A pipe fitting connection device

Abstract

The present invention discloses a pipe fitting connection device, which relates to the technical field of pipe fitting welding. The following solution is now proposed. It includes a mounting frame, and also includes: a multi-size pipe clamping mechanism, the multi-size pipe clamping mechanism is installed on the mounting frame, the multi-size pipe clamping mechanism includes two groups of hydraulic cylinders I, and rubber plates are fixed at the adjacent ends of each group of hydraulic cylinders I, and a pressure sensor I is installed on the rubber plates; through the multi-size pipe clamping mechanism, the present invention solves the clamping problems of different pipe fittings, and solves the problem that the centers are difficult to align through the center alignment mechanism, and also solves the situation that the centers of the upturned due to the flexibility of the pipe fittings are difficult to align, ensuring the aesthetics, sealing performance and straightness rate of welding. Moreover, the welding torch moving mechanism is used in cooperation with the welding torch mechanism to make the welding torch tilt and move upward, realizing slope welding, which is more beautiful and firm, and the sealing effect is also good.

Description

Technical Field

[0001] The present invention relates to the technical field of pipe fitting welding, and particularly to a pipe fitting connection device. Background Art

[0002] Pipe fitting welding is the best way for the sealed connection of metal pipe fittings. Welding connection can ensure the service life of pipe fittings and their sealing performance.

[0003] However, the sizes of pipe fittings are not necessarily the same during pipe fitting welding. Welding two pipe fittings with different diameters is difficult, specifically including the difficulties of clamping and butt joint. Because the diameters of the two pipe fittings are different, clamping is more cumbersome. It not only requires separate clamping of the two pipe fittings, but also it is difficult to align the centers after clamping, which will directly affect the welding aesthetics and sealing performance, and also affect the straightness rate of the two pipe fittings. Summary of the Invention

[0004] The present invention provides a pipe fitting connection device to solve the above deficiencies in the prior art.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A pipe fitting connection device includes a mounting frame, and further includes:

[0007] A multi-size pipe clamping mechanism, which is installed on the mounting frame. The multi-size pipe clamping mechanism includes two groups of hydraulic cylinders I. A rubber plate is fixed to the adjacent end of each group of hydraulic cylinders I, and a pressure sensor I is installed on the rubber plate;

[0008] A center alignment mechanism, which is installed on the mounting frame. The center alignment mechanism includes two groups of hydraulic cylinders II. A ball is rotatably connected to the adjacent end of each group of hydraulic cylinders II, and a pressure sensor II is installed on the hydraulic cylinder II;

[0009] A driving mechanism I, which is installed on one side of the mounting frame;

[0010] A rotating mechanism, which is installed on one side of the multi-size pipe clamping mechanism;

[0011] A driving mechanism II, which is installed on the mounting frame;

[0012] A welding torch moving mechanism, which is installed on the mounting frame;

[0013] A welding torch mechanism, which is installed on the welding torch moving mechanism;

[0014] A detection mechanism, which is installed on the mounting frame;

[0015] A controller, which is installed on a mounting bracket, and is electrically connected to a first pressure sensor and a second pressure sensor.

[0016] Further, the multi-size pipe clamping mechanism further includes a first rotating shaft rotatably connected through the mounting bracket. One end of the first rotating shaft is provided with a first one-way gear. Two sections of reciprocating threads are provided on the outer part of the first rotating shaft. A first moving block is sleeved on the outer part of the reciprocating threads. One side of the first moving block is fixed with a first collar. One side of the first collar is fixed with a second moving block. A first guide rod is sleeved inside the two second moving blocks. The first guide rod is fixed on the mounting bracket. The inner wall of the first collar is rotatably connected with an inner ring. Two groups of first hydraulic cylinders are respectively fixed on the inner walls of the two inner rings. The multi-size pipe clamping mechanism clamps pipes with different diameters with the same pressure by means of the connection of multiple hydraulic cylinders, and also meets the clamping of different diameters with the same pressure. And after operation correction, it compensates for the pipe fittings to avoid generating gaps and affecting welding.

[0017] Further, the center alignment mechanism further includes a second rotating shaft rotatably connected through the mounting bracket. One end of the second rotating shaft is provided with a second one-way gear. Two sections of reciprocating threads are provided on the outer part of the second rotating shaft. A third moving block is sleeved on the outer part of the reciprocating threads. One side of the third moving block is fixed with a second collar. The top of the second collar is fixed with a fourth moving block. A second guide rod is sleeved inside the two fourth moving blocks. The second guide rod is fixed on the mounting bracket. Two groups of second hydraulic cylinders are respectively fixed on the inner walls of the two second collars. The second hydraulic cylinders are connected to the first hydraulic cylinders through pipelines. The pipelines are externally connected to an oil supply device. The oil supply device is electrically connected to the controller. The center alignment mechanism straightens the warped pipe fittings by moving the second collar, the second hydraulic cylinders and the balls on the pipe fittings, and ensures that the connecting ends of the two pipe fittings are located on the same center line through the first collar and the second collar, which is beneficial to subsequent welding.

[0018] Further, the first driving mechanism includes a first motor fixed on one side of the mounting bracket. One end of the output shaft of the first motor is fixed with a first gear. The first gear meshes with the first one-way gear and the second one-way gear. The first motor is electrically connected to the controller.

[0019] Further, the rotating mechanism includes a mounting ring fixed on one side of one of the inner rings. A third one-way gear is fixed on the outer part of the mounting ring. The rotating mechanism drives the pipe fittings to rotate, so as to ensure 360-degree welding of the pipe fittings.

[0020] Further, the welding torch moving mechanism includes a reciprocating screw rotatably connected to the mounting frame. A one-way gear four is installed outside one end of the reciprocating screw. A moving block five is sleeved on the reciprocating screw through a thread. A guide rod three is fixed on the mounting frame. A moving block six is sleeved outside the guide rod three. The welding torch moving mechanism drives the welding torch to translate according to the coordinate data, so that the welding torch and the gap are on the same horizontal line, and the cylinder of the welding torch mechanism is cooperated to make the welding torch move obliquely upward during the welding process. The slope welding of large and small pipe fittings is more beautiful and has a better sealing effect.

[0021] Further, the driving mechanism two includes a motor two fixed on the mounting frame. A gear two is fixed at one end of the output shaft of the motor two. The gear two meshes with the one-way gear three and the one-way gear four. The motor two is electrically connected to the controller.

[0022] Further, the welding torch mechanism includes a cylinder fixed between the moving block five and the moving block six. The cylinder is externally connected to a gas source. A welding torch is fixed at the bottom end of the cylinder. The welding torch is electrically connected to the controller.

[0023] Further, the detection mechanism includes a detector fixed on the mounting frame. The detector is electrically connected to the controller.

[0024] Compared with the existing technology, the beneficial effects of the present invention are as follows:

[0025] 1. The present invention installs a multi-size pipe clamping mechanism to clamp pipe fittings with different diameters under the same pressure through the connection of multiple hydraulic cylinders, which also meets the clamping of different diameters under the same pressure, and compensates the pipe fittings after operation correction to avoid generating gaps and affecting welding.

[0026] 2. The present invention installs a center correction mechanism to straighten the warped pipe fittings by moving the collar two, the hydraulic cylinder two and the ball on the pipe fittings, and ensures that the connecting ends of the two pipe fittings are on the same center line through the collar one and the collar two, which is beneficial for subsequent welding.

[0027] 3. The present invention installs a rotating mechanism to drive the pipe fittings to rotate, so as to ensure the 360-degree welding of the pipe fittings.

[0028] 4. The present invention installs a welding torch moving mechanism to drive the welding torch to translate according to the coordinate data, so that the welding torch and the gap are on the same horizontal line, and the cylinder of the welding torch mechanism is cooperated to make the welding torch move obliquely upward during the welding process. The slope welding of large and small pipe fittings is more beautiful and has a better sealing effect.

[0029] In summary, the device is novel in design and simple in operation. The device solves the clamping problems of different pipe fittings through the multi-size pipe clamping mechanism, and solves the problem of difficult alignment of the center of the circle through the center alignment mechanism. It also solves the situation of difficult alignment of the center of the circle that is upturned due to the flexibility of the pipe fitting, ensuring the aesthetics, sealing performance and straightness of the welding. And by using the welding torch moving mechanism to cooperate with the welding torch mechanism, the welding torch is tilted and moved upward to achieve slope welding, which is more beautiful and firm, and the sealing effect is also good. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 Fig. 6 is a first three-dimensional structural schematic diagram of a pipe fitting connecting device proposed by the present invention.

[0031] Figure 2 Fig. 7 is a second three-dimensional structural schematic diagram of a pipe fitting connecting device proposed by the present invention.

[0032] Figure 3 Fig. 8 is a structural schematic diagram of a multi-size pipe clamping mechanism of a pipe fitting connecting device proposed by the present invention.

[0033] Figure 4 Fig. 9 is a structural schematic diagram of a center alignment mechanism of a pipe fitting connecting device proposed by the present invention.

[0034] In the figure: 1, mounting frame; 2, multi-size pipe clamping mechanism; 21, first collar; 22, inner ring; 23, first rotating shaft; 24, first one-way gear; 25, second moving block; 26, first hydraulic cylinder; 27, rubber plate; 28, first guide rod; 29, first moving block; 3, center alignment mechanism; 31, second collar; 32, second hydraulic cylinder; 33, ball; 34, third moving block; 35, second rotating shaft; 36, second one-way gear; 37, fourth moving block; 38, second guide rod; 4, first driving mechanism; 41, first motor; 42, first gear; 5, rotating mechanism; 51, mounting ring; 52, third one-way gear; 6, second driving mechanism; 61, second motor; 62, second gear; 7, welding torch moving mechanism; 71, reciprocating screw; 72, fourth one-way gear; 73, fifth moving block; 74, third guide rod; 75, sixth moving block; 8, welding torch mechanism; 81, cylinder; 82, welding torch; 9, detector; 10, controller. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0036] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0037] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, the meaning of "a plurality" is two or more, unless otherwise specifically defined. In addition, the terms "mounted", "connected", and "connected to" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] Example: Refer to Figures 1-4 : A pipe fitting connection device, including a mounting bracket 1, and further including:

[0039] A multi-size pipe clamping mechanism 2, the multi-size pipe clamping mechanism 2 is mounted on the mounting bracket 1, the multi-size pipe clamping mechanism 2 includes two groups of hydraulic cylinders 26, rubber plates 27 are fixed at the adjacent ends of each group of hydraulic cylinders 26, and a first pressure sensor is mounted on the rubber plate 27;

[0040] A center alignment mechanism 3, the center alignment mechanism 3 is mounted on the mounting bracket, the center alignment mechanism 3 includes two groups of hydraulic cylinders 32, balls 33 are rotatably connected to the adjacent ends of each group of hydraulic cylinders 32, and a second pressure sensor is mounted on the hydraulic cylinder 32;

[0041] A first driving mechanism 4, the first driving mechanism 4 is mounted on one side of the mounting bracket 1;

[0042] A rotating mechanism 5, the rotating mechanism 5 is mounted on one side of the multi-size pipe clamping mechanism 2;

[0043] A second driving mechanism 6, the second driving mechanism 6 is mounted on the mounting bracket 1;

[0044] A welding torch moving mechanism 7, the welding torch moving mechanism 7 is mounted on the mounting bracket 1;

[0045] The welding torch mechanism 8 is installed on the welding torch moving mechanism 7;

[0046] The detection mechanism is installed on the mounting frame 1;

[0047] The controller 10 is installed on the mounting frame 1, and the controller 10 is electrically connected to the first pressure sensor and the second pressure sensor;

[0048] The multi-size pipe clamping mechanism 2 further includes a first rotating shaft 23 rotatably connected through the mounting frame 1. One end of the first rotating shaft 23 is installed with a first one-way gear 24. Two sections of reciprocating threads one are provided on the outer part of the first rotating shaft 23. A first moving block 29 is sleeved on the outer part of the reciprocating thread one. One side of the first moving block 29 is fixed with a first collar 21. One side of the first collar 21 is fixed with a second moving block 25. A first guide rod 28 is sleeved inside the two second moving blocks 25. The first guide rod 28 is fixed on the mounting frame 1. The inner wall of the first collar 21 is rotatably connected with an inner ring 22. Two groups of first hydraulic cylinders 26 are respectively fixed on the inner walls of the two inner rings 22. The multi-size pipe clamping mechanism clamps pipes with different diameters with the same pressure through the connection of multiple hydraulic cylinders, and also satisfies the clamping of different diameters with the same pressure. And after operation correction, it compensates for the pipe fittings to avoid generating gaps and affecting welding;

[0049] The center alignment mechanism 3 further includes a second rotating shaft 35 rotatably connected through the mounting frame 1. One end of the second rotating shaft 35 is installed with a second one-way gear 36. Two sections of reciprocating threads two are provided on the outer part of the second rotating shaft 35. A third moving block 34 is sleeved on the outer part of the reciprocating thread two. One side of the third moving block 34 is fixed with a second collar 31. The top of the second collar 31 is fixed with a fourth moving block 37. A second guide rod 38 is sleeved inside the two fourth moving blocks 37. The second guide rod 38 is fixed on the mounting frame 1. Two groups of second hydraulic cylinders 32 are respectively fixed on the inner walls of the two second collars 31. The second hydraulic cylinders 32 are connected to the first hydraulic cylinders 26 through pipelines. The pipelines are externally connected to an oil supply device. The oil supply device is electrically connected to the controller 10. The center alignment mechanism moves on the pipe fitting through the second collar 31, the second hydraulic cylinders 32 and the balls 33 to straighten the warped pipe fitting. Through the first collar and the second collar, the connection ends of the two pipe fittings are ensured to be on the same center line, which is beneficial to subsequent welding;

[0050] The first driving mechanism 4 includes a first motor 41 fixed on one side of the mounting frame 1. One end of the output shaft of the first motor 41 is fixed with a first gear 42. The first gear 42 meshes with the first one-way gear 24 and the second one-way gear 36. The first motor 41 is electrically connected to the controller 10;

[0051] The rotating mechanism 5 includes a mounting ring 51 fixed on one side of one of the inner rings 22. A third one-way gear 52 is fixed on the outer part of the mounting ring 51. The rotating mechanism drives the pipe fitting to rotate, so as to ensure the 360-degree welding of the pipe fitting;

[0052] The welding torch moving mechanism 7 includes a reciprocating screw rod 71 rotatably connected to the mounting frame 1. One end of the reciprocating screw rod 71 is externally provided with a one-way gear four 72. A moving block five 73 is sleeved on the external thread of the reciprocating screw rod 71. A guide rod three 74 is fixed on the mounting frame 1. A moving block six 75 is sleeved on the external of the guide rod three 74. The welding torch moving mechanism drives the welding torch to translate according to the coordinate data, so that the welding torch and the gap are on the same horizontal line, and cooperates with the cylinder of the welding torch mechanism to make the welding torch move obliquely upward during the welding process, making the slope welding of large and small pipe fittings more beautiful and having a better sealing effect;

[0053] The driving mechanism two 6 includes a motor two 61 fixed on the mounting frame 1. One end of the output shaft of the motor two 61 is fixed with a gear two 62. The gear two 62 meshes with the one-way gear three 52 and the one-way gear four 72. The motor two 61 is electrically connected to the controller 10;

[0054] The welding torch mechanism 8 includes a cylinder 81 fixed between the moving block five 73 and the moving block six 75. The cylinder 81 is externally connected to a gas source. The bottom end of the cylinder 81 is fixed with a welding torch 82. The welding torch 82 is electrically connected to the controller 10;

[0055] The detection mechanism includes a detector 9 fixed on the mounting frame 1. The detector 9 is electrically connected to the controller 10.

[0056] Working principle:

[0057] First, insert the two pipe fittings to be connected from both sides of the device respectively. Then, the controller 10 controls the oil supply device to supply oil to the hydraulic cylinder one 26 and the hydraulic cylinder two 32 at the same time. The hydraulic cylinder one 26 pushes the rubber plate 27 to move, and the hydraulic cylinder two 32 pushes the ball 33 to move, so that the rubber plate 27 and the ball 33 contact the pipe fitting. Because multiple hydraulic cylinders are connected, the oil will be input into multiple hydraulic cylinders. Also, because the diameters of the clamped pipe fittings are different, the hydraulic cylinder that first contacts the pipe fitting through the ball 33 or the rubber plate 27 has difficulty in oil inlet, and then the oil will flow into the hydraulic cylinder that has not contacted the surface of the pipe fitting until all the hydraulic cylinders have completed the contact between the ball 33 or the rubber plate 27 and the pipe fitting. And during the clamping process, multiple pressure sensors one and pressure sensors two transmit pressure signals to the controller 10 until all the pressure values are within the same range interval. At this time, the pressures of all the hydraulic cylinders on the pipe fitting are within the same range interval. The purpose is to maintain the same pressure clamping of pipe fittings with multiple diameters by the way of connecting multiple hydraulic cylinders, and also meet the clamping of multiple diameters with the same pressure;

[0058] Then start the motor 1 41 to rotate forward to drive the gear 1 42 to rotate. Whether the gear 1 42 rotates forward or reverse, it will drive the one-way gear 1 24 and the one-way gear 2 36 to rotate at the same time. However, the one-way gear 1 24 and the one-way gear 2 36 drive the central shaft to rotate in opposite directions. Only when the gear 1 42 rotates reversely will the one-way gear 1 24 drive the central shaft to rotate, and the one-way gear 2 36 will rotate idly. On the contrary, when the gear 1 42 rotates forward, the one-way gear 1 24 will rotate idly, and the one-way gear 2 36 will drive the central shaft to rotate. The central shaft drives the rotating shaft 2 35 to rotate so that the moving block 34 rotates on the reciprocating thread 2 The pipe is moved upward and close to the pipe. During the movement, the second sleeve ring 31, the second hydraulic cylinder 32 and the ball 33 are driven to move. Because the ball 33 has pressure on the pipe fitting, and because the pipe fitting has a certain length, and the clamping only clamps one end of the pipe fitting, the pipe fitting not located inside the device will sag and bend due to its own gravity. The sagging and bending will cause the connecting end of the pipe fitting to warp upward. Therefore, the second sleeve ring 31, the second hydraulic cylinder 32 and the ball 33 are moved on the pipe fitting to straighten the warped pipe fitting, so as to ensure that the connecting ends of the two pipe fittings are located on the same center line, which is conducive to the later welding.

[0059] After straightening, compensation needs to be carried out on the pipe fittings. Due to the upward warping of the pipe fittings and the reason of manual placement, there will be a certain gap between the pipe fittings. At this time, the detector 9 is activated to detect the gap. Then, the first motor 41 rotates in reverse to drive the first gear 42 to rotate, so that the first gear 42 drives the one-way gear 24 and the first rotating shaft 23 to rotate, causing the first moving block 29 to drive the first collar 21 to approach each other. The first collar 21 drives the inner ring 22, the first hydraulic cylinder 26 and the rubber plate 27 to move and drives the clamped pipe fittings to move. When it is detected that the gap between the two pipe fittings disappears, the detector 9 sends the coordinates of the disappearing position to the controller 10. Due to the factor of manual placement of the pipe fittings, it is impossible to ensure that the placed lengths of the pipe fittings are equal. Therefore, when docking, the positions where the gaps disappear are different. So, the position of the welding torch 82 needs to be adjusted. After receiving the coordinate data, the controller 10 controls the second motor 61 to drive the second gear 62 to rotate in reverse. The rotation directions of the one-way gear 52 and the one-way gear 72 are also opposite. So, when the second gear 62 rotates in reverse, it drives the one-way gear 72 and the reciprocating screw 71 to rotate, causing the fifth moving block 73 to drive the cylinder 81 to move to the coordinate position. Then, the cylinder 81 is operated to move the welding torch 82 downward to contact the gap. Then, the welding torch 82 is started to weld the pipe fittings. If welding pipe fittings with different diameters, during the welding process, the cylinder 81 can be controlled to move the welding torch 82 upward, and the reciprocating screw 71 can be controlled to rotate to move the welding torch 82 horizontally, so as to achieve the purpose of tilting upward, making the welding position present a slope and the welding more firm. According to the situation, the second motor 61 is controlled to rotate forward to drive the second gear 62 to drive the one-way gear 52 and the mounting ring 51 to rotate. The mounting ring 51 drives the connected inner ring 22 to rotate. The inner ring 22 and the first hydraulic cylinder 26 and other structures rotate. The first hydraulic cylinder 26 drives one of the pipe fittings to rotate through the rubber plate 27. One of the pipe fittings drives the other pipe fitting to rotate through welding. The pipe fittings are welded 360 degrees for the gap to ensure the sealing of the pipe fittings.

[0060] The above is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered by the protection scope of the present invention.

Claims

1. A pipe connection device, comprising a mounting frame (1), characterized in that Also includes: A multi-size pipe clamping mechanism (2), the multi-size pipe clamping mechanism (2) being mounted on a mounting frame (1), the multi-size pipe clamping mechanism (2) comprising two groups of hydraulic cylinders (26), a rubber plate (27) being fixed to a proximal end of each group of hydraulic cylinders (26), a pressure sensor (27) being mounted on the rubber plate (27); A circle center correction mechanism (3), the circle center correction mechanism (3) is installed on a mounting frame, the circle center correction mechanism (3) comprises two groups of hydraulic cylinders (32), one end of each group of hydraulic cylinders (32) being rotatably connected to a ball (33), and a pressure sensor (33) is installed on the hydraulic cylinders (32); A driving mechanism (4), wherein the driving mechanism (4) is mounted on one side of the mounting frame (1); A rotating mechanism (5), wherein the rotating mechanism (5) is installed on one side of the multi-size pipe clamping mechanism (2); A second driving mechanism (6), wherein the second driving mechanism (6) is mounted on the mounting frame (1); A welding gun moving mechanism (7), wherein the welding gun moving mechanism (7) is mounted on the mounting frame (1); A welding gun mechanism (8), wherein the welding gun mechanism (8) is mounted on the welding gun moving mechanism (7); A detection mechanism, the detection mechanism being mounted on a mounting frame (1); A controller (10), the controller (10) being mounted on the mounting frame (1), the controller (10) being electrically connected to the first pressure sensor and the second pressure sensor; The multi-size pipe clamping mechanism (2) also includes a rotating shaft (23) that penetrates and is rotatably connected to the mounting frame (1), a one-way gear (24) is installed at one end of the rotating shaft (23), two sections of reciprocating threads are opened on the outside of the rotating shaft (23), a moving block (29) is sleeved on the outside of the reciprocating threads, a collar (21) is fixed on one side of the moving block (29), a moving block (25) is fixed on one side of the collar (21), a guide rod (28) is sleeved inside the two moving blocks (25), the guide rod (28) is fixed on the mounting frame (1), the inner wall of the collar (21) is rotatably connected to the inner ring (22), and the two groups of hydraulic cylinders (26) are respectively fixed on the inner walls of the two inner rings (22); The center correction mechanism (3) also includes a rotating shaft (35) that passes through and is rotatably connected to the mounting frame (1), a one-way gear (36) is installed at one end of the rotating shaft (35), two sections of reciprocating threads (2) are opened on the outside of the rotating shaft (35), a moving block (34) is sleeved on the outside of the reciprocating threads (2), a collar (31) is fixed on one side of the moving block (34), a moving block (37) is fixed on the top of the collar (31), and a guide rod (38) is sleeved inside the two moving blocks (37), the guide rod (38) is fixed on the mounting frame (1), the two groups of hydraulic cylinders (32) are respectively fixed on the inner walls of the two collars (31), the hydraulic cylinder (32) is connected to the hydraulic cylinder (26) through a pipeline, the pipeline is externally connected to an oil supply device, and the oil supply device is electrically connected to the controller (10); The driving mechanism 1 (4) comprises a motor 1 (41) fixed to one side of the mounting frame (1), a gear 1 (42) being fixed to one end of the output shaft of the motor 1 (41), the gear 1 (42) being meshed with a one-way gear 1 (24) and a one-way gear 2 (36), and the motor 1 (41) being electrically connected to a controller (10); The rotating mechanism (5) comprises a mounting ring (51) fixed to one side of one of the inner rings (22), and a one-way gear three (52) is fixed to the outside of the mounting ring (51); The welding gun moving mechanism (7) comprises a reciprocating screw (71) rotatably connected to the mounting frame (1), a one-way gear (4) (72) is externally mounted on one end of the reciprocating screw (71), a moving block (5) (73) is sleeved on the external thread of the reciprocating screw (71), a guide rod (3) (74) is fixed on the mounting frame (1), and a moving block (6) (75) is sleeved on the external thread of the guide rod (3) (74); The driving mechanism 2 (6) comprises a motor 2 (61) fixed on the mounting frame (1), a gear 2 (62) being fixed to one end of the output shaft of the motor 2 (61), the gear 2 (62) being meshed with a one-way gear 3 (52) and a one-way gear 4 (72), and the motor 2 (61) being electrically connected to the controller (10).

2. A pipe connection device according to claim 1, characterized in that: The welding gun mechanism (8) comprises a cylinder (81) fixed between the moving block five (73) and the moving block six (75), the cylinder (81) is connected to an external gas source, a welding gun (82) is fixed at the bottom end of the cylinder (81), and the welding gun (82) is electrically connected to the controller (10).

3. A pipe connection device according to claim 2, characterized in that: The detection mechanism comprises a detector (9) fixed on a mounting frame (1), and the detector (9) is electrically connected to a controller (10).

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