Welding equipment for valve production and using method

Abstract

The invention relates to the field of valve production. The invention discloses welding equipment for valve production and a using method, and aims to solve the problem that when an existing valve is welded, after holes of a longitudinal pipeline and a transverse pipeline are in butt joint, the welding equipment is used for welding, and the welding efficiency is high. And for butt joint of the longitudinal pipeline and the transverse pipeline, whether the trepanning axes of the longitudinal pipeline and the transverse pipeline are consistent or not needs to be determined, and then adjustment needs to be conducted by operators, so that the welding machining efficiency is affected. The expansion adjusting device is in contact transmission with the rotating device, so that the expansion adjusting device can drive the longitudinal pipeline to rotate, the trepanning position of the longitudinal pipeline is adjusted, the trepanning axis of the longitudinal pipeline is consistent with the trepanning axis of the transverse pipeline, and an operator can accurately machine the longitudinal pipeline and the transverse pipeline.

Description

Technical Field

[0001] The invention relates to the field of valve production, and in particular to welding equipment for valve production and a use method thereof. Background Art

[0002] In modern industrial production, valves, as key components for controlling fluid transmission, play a vital role in many industries such as petrochemicals, energy, and manufacturing. With the continuous improvement of industrial automation levels, the requirements for valve manufacturing are also getting higher and higher, especially in terms of precision, durability, and cost control.

[0003] The existing patent (Announcement No.: CN117984004B) discloses a welding device for valve production, including a bracket, a first adjustment member and a second adjustment member. The first clamping member is used to clamp the pipe body in a horizontal state, and the second clamping member is used to clamp the pipe head in a vertical state. Multiple grinding rods grind the intersection line on the pipe body to ensure that the pipe head can be in close contact with the pipe body. At the same time, by adjusting the angle of the adjustment block, while the multiple grinding rods rotate around the adjustment spindle, the tightening force of the tightening rod on the grinding rod is different. In the intersection line of the pipe body, the corresponding thickness of the pipe body is different. By adjusting the squeezing force on the grinding rod, it is ensured that the degree of grinding of the intersection line of the pipe body is more uniform. At the same time, the multiple grinding rods can align the position of the intersection line of the pipe body with the pipe head during the rotation process, ensuring that the pipe head and the pipe body remain aligned during welding, thereby improving the efficiency of valve processing. In the process of realizing the present invention, the inventors found that there are at least the following problems in the prior art that have not been solved: when the existing valve is welded, the openings of the longitudinal pipe and the transverse pipe need to be butt-jointed and then welded by welding equipment, and for the butt-jointing of the longitudinal pipe and the transverse pipe, it is necessary to determine whether the axes of the openings of the longitudinal pipe and the transverse pipe are consistent, which requires adjustments by the operator, affecting the efficiency of the welding process. Summary of the invention

[0004] The object of the present invention is to provide a welding device for valve production and a method of use, so as to solve the problems raised in the above background technology. To achieve the above object, the present invention provides the following technical solutions: a welding device for valve production, comprising a processing table arranged horizontally, a placing table fixedly connected to the top of the processing table, a placing groove for placing two transverse pipes in the placing table, a screw slide is also arranged on the top of the processing table, a support seat is arranged on the slide of the screw slide, the support seat is located above the placing groove, a driving moving device is arranged on the support seat, the driving moving device is rotatably matched with the support seat, an expansion adjustment device is rotatably arranged on the support seat, the expansion adjustment device is rotatably matched with the support seat, the driving moving device and the expansion adjustment device are transmission matched, the driving moving device is also transmission-connected with a rotating device, the rotating device is transmission matched with the driving moving device, a connecting portion is arranged on the expansion adjustment device, the connecting portion is transmission matched with the rotating device, a positioning device is also slidably arranged on the support seat, and the positioning device is located beside the expansion adjustment device.

[0005] Preferably, the driving mobile device includes a driving motor fixedly connected to the support base, the main shaft of the driving motor is connected to the driving gear, a driving screw rod is rotatably arranged on the support base, a transmission gear meshing with the driving gear is fixedly connected to the driving screw rod, a limiting piece is spirally arranged on the driving screw rod, the limiting piece is slidably matched with the inner wall of the support base, a moving plate is hingedly arranged on the support base, a first moving groove and a second moving groove are correspondingly opened on the moving plate, the limiting piece is in contact with the first moving groove, and the second moving groove on the moving plate is transmission-matched with the expansion adjustment device.

[0006] Preferably, the limit member includes an outer shell slidably arranged on the inner wall of the support seat, and limit wheels are rotatably arranged on both side walls of the outer shell, and the limit wheels are located in the first moving groove in the movable plate, and a limit cylinder is rotatably arranged in the outer shell, and the limit cylinder is threadedly connected to the driving screw rod, and a plurality of limit grooves are arranged at equal intervals around the circumference of the outer wall of the limit cylinder, and a limit block is slidably arranged in the outer shell, and the limit block is clamped with the limit groove on the limit cylinder, and an extrusion spring is also connected between the limit block and the outer shell, and a fixing rod is fixedly connected to the limit block, and a limit plate is also slidably arranged on the outer shell, and a V-shaped oblique groove is opened on the limit plate, and the fixing rod contacts with the V-shaped oblique groove.

[0007] Preferably, the expansion adjustment device includes an inner rod rotatably arranged on the support seat, the inner rod is clamped with an outer rod, and a fixing ring is fixedly connected to the outer wall of the outer rod accordingly, the support seat is rotatably provided with a rotating chuck, the rotating chuck is clamped and cooperated with the outer rod, and the rotating chuck is relatively provided with slide grooves in pairs, and an expansion frame is slidably arranged in each slide groove on the rotating chuck, and a connecting frame is correspondingly hingedly arranged on the expansion frame, and the other ends of the two connecting frames away from the expansion frame are respectively hinged and cooperated with the fixing ring on the outer rod, and the outer rod is provided with a clamping groove, and two clamping blocks are rotatably arranged in the clamping groove, and the two clamping blocks are connected to the clamping frame, the clamping frame is slidably cooperated with the support seat, and a clamping wheel is extended from the clamping frame toward the second movable groove on the movable plate.

[0008] Preferably, the rotating device includes a rotating rod rotatably connected to the support seat, a rotating disk is fixedly connected to the rotating rod, a driving disk is also fixedly connected to the driving spiral rod, a driving belt is sleeved between the driving disk and the rotating disk, a friction cone disk is clamped on the rotating rod, a pressure spring is sleeved on the rotating rod, and both ends of the pressure spring are respectively connected to the upper end surface of the friction cone disk and the support seat.

[0009] Preferably, the connecting part on the expansion adjustment device includes a telescopic sleeve rod telescopically arranged at the end of the inner rod, the telescopic sleeve rod is provided with a friction concave disk which frictionally transmits with the friction cone disk, the telescopic sleeve rod is provided with an annular groove, a relatively arranged ring block is rotatably arranged in the annular groove, and the ring block is connected to the clamping frame.

[0010] Preferably, the positioning device includes a positioning rod rotatably arranged on a support seat, the positioning rod is sleeved with a torsion spring, two ends of the torsion spring are respectively connected to the positioning rod and the support seat, the bottom of the positioning rod is fixedly connected to a rotating frame, the support seat is correspondingly slidably provided with a first mounting rod, and the support seat is also correspondingly slidably provided with a second mounting rod, one end of the two first mounting rods is fixedly connected to the first mounting frame, and one end of the two second mounting rods is fixedly connected to the second mounting frame, the first mounting frame and the second mounting frame are respectively located on both sides of the rotating frame, and an articulated frame is hingedly connected to the rotating frame between the first mounting frame and the second mounting frame, the other end of the two first mounting rods is fixedly connected to the first detection frame, and the other end of the two second mounting rods is fixedly connected to the second detection frame.

[0011] Preferably, the positioning device is also provided with a trigger member, and the trigger member includes a rotating cam fixedly connected to the end of the positioning rod away from the hinged frame, a seesaw is hingedly provided on the support seat, a connecting spring is provided between the seesaw and the support seat, an end of the seesaw is provided with a resistance wheel for rotation toward the rotating cam, and the end of the seesaw away from the resistance wheel is hingedly provided with a trigger frame, a positioning groove is provided on the friction cone disk, and the trigger frame is engaged and rotated with the positioning groove on the friction cone disk.

[0012] Preferably, the method for using the welding equipment for valve production comprises the following steps:

[0013] S1: When the expansion adjustment device is controlled to support the expansion of the longitudinal pipeline, the driving motor drives the driving gear to rotate, and the rotation of the driving gear drives the transmission gear to rotate, and the rotation of the transmission gear causes the driving spiral rod to rotate. At this time, the limit block is engaged with the limit groove in the limit cylinder, and the outer shell limits the rotation of the limit cylinder, and then when the driving spiral rod rotates, it can drive the spiral-matched limit cylinder to move the outer shell downward. After the outer shell moves downward, the limit wheels arranged on the two side walls of the outer shell will drive the first moving groove to deflect the moving plate on the support seat, and since the moving plate is hingedly arranged on the support seat, when the moving plate deflects, the other side of the moving plate with the second moving groove will move upward, and then the expansion adjustment device will move upward through the second moving groove to support the expansion of the longitudinal pipeline;

[0014] S2: With the continuous rotation of the driving screw rod, the driving screw rod will drive the limiting cylinder to make the outer shell continue to move downward. When the outer shell continues to move downward and is about to contact the bottom of the support seat, the limiting plate arranged on the outer shell will contact the bottom of the support seat. At this time, the bottom of the support seat will squeeze the limiting plate, and the limiting plate will move toward the outer shell. The V-shaped inclined groove arranged on the limiting plate will drive the fixed rod on the limiting block to move. At this time, the limiting block moves in the direction away from the limiting cylinder, and the limiting block will be separated from the limiting groove on the limiting cylinder. When the limiting block is separated from the limiting groove on the limiting cylinder, the limiting cylinder is not limited by the limiting block at this time. Then, when the driving screw rod rotates, it will drive the limiting cylinder to idle in the outer shell, so that when the outer shell moves to contact with the support seat, the moving plate is driven to deflect to make the expansion adjustment device expand the longitudinal pipeline, and then stop the continuous expansion of the longitudinal pipeline, so as to avoid damage to the device caused by overload of the expansion adjustment device and the driving moving device;

[0015] S3: When the driving screw rod drives the limiting member to move downward, the limiting member drives the first moving groove on the moving plate to deflect the moving plate, and when the moving plate deflects, the second moving groove on the moving plate drives the clamping wheel on the clamping frame to move the clamping frame upward, and the upward movement of the clamping frame drives the two clamping blocks to move upward, and the two clamping blocks are in the clamping grooves on the outer rod, so that the outer rod can move upward, and when the outer rod moves upward, the outer rod drives the connecting frame to move the expansion frame toward the inner wall of the longitudinal pipe, and the expansion frame moves to the inner wall of the longitudinal pipe under the restriction of the sliding groove on the rotating chuck and is tightly attached to the inner wall of the longitudinal pipe, thereby expanding and clamping the inner wall of the longitudinal pipe;

[0016] S4: The driving screw rod rotates to drive the driving disc to rotate. The driving disc rotates through the driving belt so that the rotating disc can drive the rotating rod to rotate. The friction cone disc is clamped on the rotating rod, and then when the rotating rod rotates, the friction cone disc can be driven to rotate. When the second moving groove on the moving plate drives the clamping frame to move up, the clamping frame moves up and drives the outer rod to move up through the clamping block. After the outer rod moves up, it drives the expansion frame to clamp and limit the inner wall of the longitudinal pipe. While the clamping frame moves up, the clamping frame will drive the ring block to move up synchronously, and the ring block will drive the telescopic sleeve rod to move up. The upward movement of the telescopic sleeve rod will make the friction concave disc and the friction cone disc close to each other. After the friction concave disc and the friction cone disc are in contact, the friction concave disc can be driven to rotate through the rotation of the friction cone disc, and the friction concave disc will drive the telescopic sleeve rod to rotate. When the telescopic sleeve rod drives the inner rod to rotate, the inner rod will drive the outer rod to rotate synchronously. At this time, the longitudinal pipe clamped by the expansion adjustment device will rotate, and then the position of the opening on the longitudinal pipe can be adjusted, so that the axis of the opening on the longitudinal pipe can be consistent with the axis of the opening on the two transverse pipes.

[0017] S5: When the operator sets the longitudinal pipe on the expansion adjustment device, the positioning rod can be rotated under the drive of the torsion spring, and the rotation of the positioning rod drives the rotating frame to rotate. When the rotating frame rotates, it will drive the two hinged frames to respectively make the first mounting frame and the second mounting frame move relative to each other, and then drive the first detection frame and the second detection frame to clamp and limit the outer wall of the longitudinal pipe through the first mounting rod and the second mounting rod. The axis of the outer wall of the longitudinal pipe at the opening is arranged in a plane. When the rotating device drives the expansion adjustment device to rotate the clamped longitudinal pipe, the outer wall of the longitudinal pipe abuts against the first detection frame and the second detection frame, and the first detection frame and the second detection frame cause the hinged frame to drive the rotating frame to deflect. When the plane at the axial position of the wall and the opening contacts the first detection frame and the second detection frame, the deflection of the rotating frame will drive the positioning rod to rotate, and the rotation of the positioning rod will cause the rotating cam to rotate. At this time, the raised end of the rotating cam will just move to contact the interference wheel, and the interference wheel will cause the seesaw to deflect on the support seat under the drive of the rotating cam. When the seesaw deflects, the other end of the seesaw away from the interference wheel will drive the trigger frame to contact the positioning groove on the friction cone disk, so that the trigger frame can drive the friction cone disk to move upward on the rotating rod. At this time, the friction cone disk is separated from the friction concave disk, thereby stopping the inner rod from rotating. After the inner rod stops rotating, it is determined that the opening axis of the longitudinal pipeline is on the same axis as the first detection frame and the second detection frame.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] In the present invention, the movable plate is hingedly arranged on the support seat, and when the movable plate is deflected, the other side of the movable plate provided with the second movable groove will move upward, and then the expansion adjustment device will move upward through the second movable groove to support the expansion of the longitudinal pipeline, so that the longitudinal pipeline is restricted in the expansion adjustment device.

[0020] In the present invention, when the outer shell moves to contact the support seat, it drives the movable plate to deflect so that the expansion adjustment device stops expanding the longitudinal pipe after expanding the longitudinal pipe, thereby avoiding damage to the device caused by overload of the expansion adjustment device and the driving movable device.

[0021] In the present invention, the expansion frame moves to the inner wall of the longitudinal pipe under the restriction of the slide groove on the rotating chuck and is tightly attached to the inner wall of the longitudinal pipe, thereby expanding and clamping the inner wall of the longitudinal pipe. When the longitudinal pipe is welded, it is convenient for operators to weld the longitudinal pipe with two transverse pipes, and the valve will not be interfered by the clamping device during welding, thereby improving the efficiency of the welding process.

[0022] In the present invention, the longitudinal pipe clamped by the expansion adjustment device will rotate, thereby adjusting the position of the opening on the longitudinal pipe so that the axis of the opening on the longitudinal pipe can be consistent with the axis of the openings on the two transverse pipes. Driven by the driving moving device and the rotating device, the expansion adjustment device can be driven to expand and position the longitudinal pipe. After the longitudinal pipe is expanded and positioned, the expansion adjustment device and the rotating device are contacted and transmitted, so that the expansion adjustment device can drive the longitudinal pipe to rotate, thereby adjusting the position of the opening of the longitudinal pipe so that the axis of the opening of the longitudinal pipe is consistent with the axis of the opening of the transverse pipe, so that the operator can accurately process the longitudinal pipe and the transverse pipe.

[0023] In the present invention, when the expansion adjustment device drives the longitudinal pipeline to rotate, when the opening axis of the longitudinal pipeline is coaxial with the first detection frame and the second detection frame, the rotating device is controlled to stop the expansion adjustment device from rotating, thereby facilitating the determination of the opening position of the longitudinal pipeline when welding the valve and facilitating the connection between the valve and the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the local three-dimensional structure of the present invention Figure 1 ;

[0026] Figure 3 It is a schematic diagram of the three-dimensional structure of the driving moving device and the rotating device of the present invention;

[0027] Figure 4 It is a schematic diagram of the three-dimensional structure of the driving and moving device of the present invention;

[0028] Figure 5 It is a cross-sectional view of the three-dimensional structure of the limiting member of the present invention;

[0029] Figure 6 Schematic diagram of the three-dimensional structure of the expansion adjustment device of the present invention Figure 1 ;

[0030] Figure 7 Schematic diagram of the three-dimensional structure of the expansion adjustment device of the present invention Figure 2 ;

[0031] Figure 8 It is a partial three-dimensional structural schematic diagram of the expansion adjustment device of the present invention;

[0032] Fig. 9 It is a schematic diagram of the local three-dimensional structure of the present invention Figure 2 ;

[0033] Fig.10 It is a schematic diagram of the three-dimensional structure of the positioning device of the present invention;

[0034] Fig.11 It is a schematic diagram of the three-dimensional structure of the trigger member of the present invention;

[0035] Fig.12 It is a schematic diagram of the local three-dimensional structure of the present invention Figure 3 ;

[0036] Fig.13 It is a schematic diagram of the three-dimensional structure of the longitudinal pipeline and the transverse pipeline of the present invention.

[0037] In the figure: 1, processing table; 11, placing table; 12, placing groove; 13, screw slide; 14, supporting seat; 2, driving moving device; 21, driving motor; 22, driving gear; 23, driving screw rod; 24, transmission gear; 25, moving plate; 26, first moving groove; 27, second moving groove; 3, limiting member; 31, outer shell; 32, limiting wheel; 33, limiting cylinder; 34, limiting groove; 35, limiting block; 36, extrusion spring; 37, fixing rod; 38, limiting plate; 39, V-shaped inclined groove; 4, expansion adjustment device; 41, inner rod; 42, outer rod; 43, fixing ring; 44, rotating chuck; 45, slide groove; 46, expansion frame; 47, connecting frame; 48, clamping groove; 49, clamping block; 410, Snap-on frame; 411, snap-on wheel; 5, rotating device; 51, rotating rod; 52, rotating disk; 53, driving disk; 54, driving belt; 55, friction cone disk; 56, pressure spring; 6, connecting part; 61, telescopic sleeve rod; 62, friction concave disk; 63, annular groove; 64, ring block; 7, positioning device; 71, positioning rod; 72, torsion spring; 73, rotating frame; 74, first mounting rod; 75, second mounting rod; 76, articulated frame; 77, first detection frame; 78, second detection frame; 79, first mounting frame; 710, second mounting frame; 8, trigger member; 81, rotating cam; 82, seesaw; 83, connecting spring; 84, resistance wheel; 85, trigger frame; 86, positioning groove; 9, longitudinal pipeline; 91, transverse pipeline. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technical personnel in this field without creative work are within the scope of protection of the present invention.

[0039] See also Figures 1 to 13The present invention provides a technical solution: a welding device for valve production, comprising a horizontally arranged processing table 1, a placing table 11 is fixedly connected to the top of the processing table 1, a placing groove 12 for placing two horizontal pipes 91 is opened in the placing table 11, a screw slide 13 is also arranged on the top of the processing table 1, a support seat 14 is arranged on the slide of the screw slide 13, the support seat 14 is located above the placing groove 12, a driving mobile device 2 is arranged on the support seat 14, the driving mobile device 2 is rotatably matched with the support seat 14, an expansion adjustment device 4 is rotatably arranged on the support seat 14, the expansion adjustment device 4 is rotatably matched with the support seat 14, the driving mobile device 2 and the expansion adjustment device 4 are transmission matched, the driving mobile device 2 is also transmission-connected with a rotating device 5, the rotating device 5 is transmission matched with the driving mobile device 2, a connecting portion 6 is arranged on the expansion adjustment device 4, the connecting portion 6 is transmission matched with the rotating device 5, a positioning device 7 is also slidably arranged on the support seat 14, and the positioning device 7 is located next to the expansion adjustment device 4.

[0040] In this embodiment, Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the driving mobile device 2 includes a driving motor 21 fixedly connected to the support seat 14, the main shaft of the driving motor 21 is connected to the driving gear 22, a driving screw rod 23 is rotatably provided on the support seat 14, a transmission gear 24 meshing with the driving gear 22 is fixedly connected to the driving screw rod 23, a limiting member 3 is spirally provided on the driving screw rod 23, the limiting member 3 is slidably matched with the inner wall of the support seat 14, a moving plate 25 is hingedly provided on the support seat 14, a first moving groove 26 and a second moving groove 27 are correspondingly provided on the moving plate 25, the limiting member 3 is in contact with the first moving groove 26, and the second moving groove 27 on the moving plate 25 is in transmission match with the expansion adjustment device 4;

[0041] The limiting member 3 includes an outer shell 31 slidably arranged on the inner wall of the support seat 14, and limiting wheels 32 are rotatably arranged on both side walls of the outer shell 31, and the limiting wheels 32 are located in the first moving groove 26 of the moving plate 25, and a limiting cylinder 33 is rotatably arranged in the outer shell 31, and the limiting cylinder 33 is threadedly connected to the driving screw rod 23, and a plurality of limiting grooves 34 are evenly spaced around the outer wall circumference of the limiting cylinder 33, and a limiting block 35 is slidably arranged in the outer shell 31, and the limiting block 35 is clamped with the limiting groove 34 on the limiting cylinder 33, and an extrusion spring 36 is also connected between the limiting block 35 and the outer shell 31, and a fixing rod 37 is fixedly connected to the limiting block 35, and a limiting plate 38 is also slidably arranged on the outer shell 31, and a V-shaped oblique groove 39 is opened on the limiting plate 38, and the fixing rod 37 contacts with the V-shaped oblique groove 39;

[0042] When the expansion adjustment device 4 is controlled to expand and support the longitudinal pipe 9, the driving motor 21 drives the driving gear 22 to rotate, and the rotation of the driving gear 22 drives the transmission gear 24 to rotate, and the rotation of the transmission gear 24 causes the driving screw rod 23 to rotate. At this time, the limit block 35 is engaged with the limit groove 34 in the limit cylinder 33, and the outer shell 31 limits the rotation of the limit cylinder 33, and then when the driving screw rod 23 rotates, it can drive the spirally matched limit cylinder 33 to move the outer shell 31 downward. After the outer shell 31 moves downward, the limit wheels 32 arranged on the two side walls of the outer shell 31 will drive the first moving groove 26 to deflect the moving plate 25 on the support seat 14, and since the moving plate 25 is hingedly arranged on the support seat 14, and then when the moving plate 25 deflects, the other side of the moving plate 25 with the second moving groove 27 will move upward, and then the expansion adjustment device 4 is moved upward through the second moving groove 27 to expand and support the longitudinal pipe 9, so that the longitudinal pipe 9 is restricted in the expansion adjustment device 4;

[0043] As the driving screw rod 23 continues to rotate, the driving screw rod 23 will drive the limiting cylinder 33 to make the outer shell 31 continue to move downward. When the outer shell 31 continues to move downward and is about to contact the bottom of the support seat 14, the limiting plate 38 provided on the outer shell 31 will contact the bottom of the support seat 14. At this time, the bottom of the support seat 14 will squeeze the limiting plate 38, and the limiting plate 38 will move toward the inner side of the outer shell 31. The V-shaped inclined groove 39 provided on the limiting plate 38 will drive the fixing rod 37 on the limiting block 35 to move. At this time, the limiting block 35 moves in the direction away from the limiting cylinder 33. , the limit block 35 will be disengaged from the limit groove 34 on the limit cylinder 33. When the limit block 35 is disengaged from the limit groove 34 on the limit cylinder 33, the limit cylinder 33 is no longer limited by the limit block 35. Then, when the driving screw rod 23 rotates, the limit cylinder 33 will be driven to idle in the outer shell 31, so that when the outer shell 31 moves to contact the support seat 14, the moving plate 25 will be driven to deflect and the expansion adjustment device 4 will stop the continuous expansion of the longitudinal pipe 9 after expanding the longitudinal pipe 9, so as to avoid damage to the components caused by overload of the expansion adjustment device 4 and the driving moving device 2.

[0044] In this embodiment, Figure 1 , Figure 2 , Figure 6 , Figure 7 and Figure 8 As shown, the expansion adjustment device 4 includes an inner rod 41 rotatably arranged on the support seat 14, an outer rod 42 is clamped on the inner rod 41, and a fixing ring 43 is fixedly connected to the outer wall of the outer rod 42. A rotating chuck 44 is rotatably arranged on the support seat 14, and the rotating chuck 44 is clamped and matched with the outer rod 42. Slide grooves 45 are arranged on the rotating chuck 44 in pairs, and an expansion frame 46 is slidably arranged in each slide groove 45 on the rotating chuck 44. The expansion frame 46 is hingedly provided with a connecting frame 47, and the other ends of the two connecting frames 47 away from the expansion frame 46 are respectively hingedly matched with the fixing ring 43 on the outer rod 42, and the outer rod 42 is provided with a clamping groove 48, and two clamping blocks 49 are rotatably provided in the clamping groove 48, and the two clamping blocks 49 are connected with a clamping frame 410, and the clamping frame 410 is slidably matched with the support seat 14, and a clamping wheel 411 is extended from the clamping frame 410 toward the second moving groove 27 on the moving plate 25;

[0045] When the driving screw rod 23 drives the limiting member 3 to move downward, the limiting member 3 drives the first moving groove 26 on the moving plate 25 to deflect the moving plate 25. When the moving plate 25 deflects, the second moving groove 27 on the moving plate 25 drives the clamping wheel 411 on the clamping frame 410 to move the clamping frame 410 upward. The upward movement of the clamping frame 410 drives the two clamping blocks 49 to move upward. The two clamping blocks 49 are in the clamping grooves 48 on the outer rod 42, so that the outer rod 42 can move upward. When the outer rod 42 is rotated, the connecting frame 47 is driven by the outer rod 42 to move the expansion frame 46 toward the inner wall of the longitudinal pipe 9. The expansion frame 46 moves to the inner wall of the longitudinal pipe 9 under the restriction of the slide groove 45 on the rotating chuck 44 and is tightly attached to the inner wall of the longitudinal pipe 9, thereby expanding and clamping the inner wall of the longitudinal pipe 9. When the longitudinal pipe 9 is welded, it is convenient for the operator to weld the longitudinal pipe 9 with the two transverse pipes 91, and the valve will not be interfered by the clamping device during welding, thereby improving the efficiency of the welding process.

[0046] In this embodiment, Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 8 , Fig. 9 and Fig.12 As shown, the rotating device 5 includes a rotating rod 51 rotatably connected to the support seat 14, a rotating disk 52 is fixedly connected to the rotating rod 51, a driving disk 53 is also fixedly connected to the driving screw rod 23, a driving belt 54 is sleeved between the driving disk 53 and the rotating disk 52, a friction cone disk 55 is clamped on the rotating rod 51, and a pressure spring 56 is sleeved on the rotating rod 51, and the two ends of the pressure spring 56 are respectively connected to the upper end surface of the friction cone disk 55 and the support seat 14;

[0047] The connecting part 6 on the expansion adjustment device 4 includes a telescopic sleeve rod 61 telescopically arranged at the end of the inner rod 41, and the telescopic sleeve rod 61 is provided with a friction concave disc 62 that is frictionally driven with the friction cone disc 55, and the telescopic sleeve rod 61 is provided with an annular groove 63, and a ring block 64 that is relatively arranged is rotatably arranged in the annular groove 63, and the ring block 64 is connected to the clamping frame 410;

[0048] The driving screw rod 23 rotates to drive the driving disk 53 to rotate. The driving disk 53 rotates through the driving belt 54 so that the rotating disk 52 can drive the rotating rod 51 to rotate, and the friction cone disk 55 is clamped on the rotating rod 51, and then when the rotating rod 51 rotates, the friction cone disk 55 can be driven to rotate. When the second moving groove 27 on the movable plate 25 drives the clamping frame 410 to move up, the clamping frame 410 moves up and drives the outer rod 42 to move up through the clamping block 49. After the outer rod 42 moves up, it drives the expansion frame 46 to clamp and limit the inner wall of the longitudinal pipe 9. When the clamping frame 410 moves up, the clamping frame 410 will drive the ring block 64 to move up synchronously, and the ring block 64 will drive the telescopic sleeve rod 61 to move up. The upward movement of the telescopic sleeve rod 61 will make the friction concave disk 62 and the friction cone disk 55 close to each other. When the friction concave disk 62 and the friction cone disk 55 are in contact, the rotation of the friction cone disk 55 can drive the friction concave disk 62 to move up. When the disc 62 rotates, the friction concave disc 62 will drive the telescopic sleeve rod 61 to rotate. When the telescopic sleeve rod 61 drives the inner rod 41 to rotate, the inner rod 41 will drive the outer rod 42 to rotate synchronously. At this time, the longitudinal pipe 9 clamped by the expansion adjustment device 4 will rotate, and then the position of the opening on the longitudinal pipe 9 is adjusted, so that the axis of the opening on the longitudinal pipe 9 can be consistent with the axis of the openings on the two transverse pipes 91. Driven by the driving moving device 2 and the rotating device 5, the expansion adjustment device 4 can be driven to expand and position the longitudinal pipe 9. After the longitudinal pipe 9 is expanded and positioned, the expansion adjustment device 4 and the rotating device 5 are contacted and transmitted, so that the expansion adjustment device 4 can drive the longitudinal pipe 9 to rotate, and then the position of the opening of the longitudinal pipe 9 is adjusted, so that the axis of the opening of the longitudinal pipe 9 is consistent with the axis of the opening of the transverse pipe 91, so that the operator can accurately process the longitudinal pipe 9 and the transverse pipe 91.

[0049] In this embodiment, Figure 1 , Fig. 9 , Fig.10 and Fig.11 As shown, the positioning device 7 includes a positioning rod 71 rotatably arranged on the support seat 14, the positioning rod 71 is sleeved with a torsion spring 72, the two ends of the torsion spring 72 are respectively connected to the positioning rod 71 and the support seat 14, the bottom of the positioning rod 71 is fixedly connected to a rotating frame 73, a first mounting rod 74 is correspondingly slidably arranged on the support seat 14, and a second mounting rod 75 is also correspondingly slidably arranged on the support seat 14, one end of the two first mounting rods 74 is fixedly connected to a first mounting frame 79, one end of the two second mounting rods 75 is fixedly connected to a second mounting frame 710, the first mounting frame 79 and the second mounting frame 710 are respectively located on both sides of the rotating frame 73, an articulated frame 76 is hingedly connected between the first mounting frame 79 and the second mounting frame 710 and the rotating frame 73, the other ends of the two first mounting rods 74 are fixedly connected to a first detection frame 77, and the other ends of the two second mounting rods 75 are fixedly connected to a second detection frame 78;

[0050] The positioning device 7 is also provided with a trigger member 8, and the trigger member 8 includes a rotating convex plate 81 fixedly connected to the end of the positioning rod 71 away from the hinge frame 76. A seesaw 82 is hingedly provided on the support seat 14, and a connecting spring 83 is provided between the seesaw 82 and the support seat 14. A contact wheel 84 is provided on one end of the seesaw 82 to rotate in the direction of the rotating convex plate 81, and a trigger frame 85 is hingedly provided on the end of the seesaw 82 away from the contact wheel 84. A positioning groove 86 is provided on the friction cone 55, and the trigger frame 85 is engaged and rotated with the positioning groove 86 on the friction cone 55;

[0051] When the operator sets the longitudinal pipe 9 on the expansion adjustment device 4, the positioning rod 71 can be rotated under the drive of the torsion spring 72, and the rotation of the positioning rod 71 drives the rotating frame 73 to rotate. When the rotating frame 73 rotates, it drives the two articulated frames 76 to respectively move the first mounting frame 79 and the second mounting frame 710 relative to each other, and then drives the first detection frame 77 and the second detection frame 78 to clamp and limit the outer wall of the longitudinal pipe 9 through the first mounting rod 74 and the second mounting rod 75. The axis of the outer wall of the longitudinal pipe 9 at the opening is arranged in a plane. When the rotating device 5 drives When the expansion adjustment device 4 rotates the clamped longitudinal pipe 9, the outer wall of the longitudinal pipe 9 abuts against the first detection frame 77 and the second detection frame 78, and the first detection frame 77 and the second detection frame 78 cause the hinge frame 76 to drive the rotating frame 73 to deflect, and when the outer wall of the longitudinal pipe 9 and the plane at the axial position of the opening are in contact with the first detection frame 77 and the second detection frame 78, the deflection of the rotating frame 73 drives the positioning rod 71 to rotate, and the rotation of the positioning rod 71 causes the rotating convex plate 81 to rotate, and at this time, the convex end of the rotating convex plate 81 will just move to the contact wheel 84. The contact wheel 84, driven by the rotating convex plate 81, will cause the seesaw 82 to deflect on the support seat 14. When the seesaw 82 deflects, the other end of the seesaw 82 away from the contact wheel 84 will drive the trigger frame 85 to contact the positioning groove 86 on the friction cone plate 55, so that the trigger frame 85 can drive the friction cone plate 55 to move upward on the rotating rod 51. At this time, the friction cone plate 55 is separated from the friction concave plate 62, thereby stopping the rotation of the inner rod 41. After the inner rod 41 stops rotating, it is determined that the opening axis of the longitudinal pipe 9 is in the same position as the first detection frame 77 and the second detection frame 78. The support seat 14 is then driven by the screw slide 13 to move down to the placement groove 12, and the two transverse pipes 91 in the placement groove 12 can be inserted into the openings in the longitudinal pipe 9, thereby realizing the docking and positioning of the valve pipe. Through this arrangement, when the expansion adjustment device 4 drives the longitudinal pipe 9 to rotate, when the opening axis of the longitudinal pipe 9 is coaxial with the first detection frame 77 and the second detection frame 78, the rotating device 5 is controlled to stop the expansion adjustment device 4 from rotating, thereby facilitating the determination of the opening position of the longitudinal pipe 9 when welding the valve, and facilitating the docking of the valve pipe.

[0052] The use method and advantages of the present invention: The use method of the welding equipment for valve production, the working process is as follows:

[0053] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 , Fig.11 , Fig.12 , Fig.13 As shown:

[0054] S1: When the expansion adjustment device 4 is controlled to expand and support the longitudinal pipe 9, the driving motor 21 drives the driving gear 22 to rotate, and the rotation of the driving gear 22 will drive the transmission gear 24 to rotate, and the rotation of the transmission gear 24 causes the driving screw rod 23 to rotate. At this time, the limit block 35 is engaged with the limit groove 34 in the limit cylinder 33, and the outer shell 31 limits the rotation of the limit cylinder 33, and then when the driving screw rod 23 rotates, it can drive the spirally matched limit cylinder 33 to make the outer shell 31 move downward. After the outer shell 31 moves downward, the limit wheels 32 arranged on the two side walls of the outer shell 31 will drive the first moving groove 26 to deflect the moving plate 25 on the support seat 14, and since the moving plate 25 is hingedly arranged on the support seat 14, and then when the moving plate 25 deflects, the other side of the moving plate 25 with the second moving groove 27 will move upward, and then the expansion adjustment device 4 is moved upward through the second moving groove 27 to support the expansion of the longitudinal pipe 9;

[0055] S2: As the driving screw rod 23 continues to rotate, the driving screw rod 23 will drive the limiting cylinder 33 to make the outer shell 31 continue to move downward. When the outer shell 31 continues to move downward and is about to contact the bottom of the support seat 14, the limiting plate 38 set on the outer shell 31 will contact the bottom of the support seat 14. At this time, the bottom of the support seat 14 will squeeze the limiting plate 38, and the limiting plate 38 will move toward the inner side of the outer shell 31. The V-shaped inclined groove 39 set on the limiting plate 38 will drive the fixing rod 37 on the limiting block 35 to move. At this time, the limiting block 35 moves in a direction away from the limiting cylinder 33. When the screw rod 23 is driven to rotate, the limiting cylinder 33 is driven to idle in the outer shell 31, so that the outer shell 31 moves to contact with the support seat 14, and the moving plate 25 is driven to deflect, so that the expansion adjustment device 4 stops the continuous expansion of the longitudinal pipe 9 after expanding the longitudinal pipe 9, so as to avoid damage to the components caused by overload of the expansion adjustment device 4 and the driving moving device 2;

[0056] S3: When the driving screw rod 23 drives the limiting member 3 to move downward, the limiting member 3 drives the first moving groove 26 on the moving plate 25 to deflect the moving plate 25, and when the moving plate 25 deflects, the second moving groove 27 on the moving plate 25 drives the clamping wheel 411 on the clamping frame 410 to move the clamping frame 410 upward, and the upward movement of the clamping frame 410 drives the two clamping blocks 49 to move upward, and the two clamping blocks 49 are in the clamping groove 48 on the outer rod 42, so that the outer rod 42 can move upward, and when the outer rod 42 moves upward, the outer rod 42 drives the connecting frame 47 to move the expansion frame 46 toward the inner wall of the longitudinal pipe 9, and the expansion frame 46 moves to the inner wall of the longitudinal pipe 9 under the restriction of the sliding groove 45 on the rotating chuck 44, and is tightly attached to the inner wall of the longitudinal pipe 9, thereby expanding and clamping the inner wall of the longitudinal pipe 9;

[0057] S4: The driving screw rod 23 rotates to drive the driving disk 53 to rotate. The driving disk 53 rotates through the driving belt 54 so that the rotating disk 52 can drive the rotating rod 51 to rotate, and the friction cone disk 55 is clamped on the rotating rod 51, so that when the rotating rod 51 rotates, it can drive the friction cone disk 55 to rotate. When the second moving groove 27 on the moving plate 25 drives the clamping frame 410 to move upward, the clamping frame 410 moves upward and drives the outer rod 42 to move upward through the clamping block 49. After the outer rod 42 moves upward, it drives the expansion frame 46 to clamp and limit the inner wall of the longitudinal pipe 9. When the clamping frame 410 moves upward, the clamping frame 410 will drive the ring block 64 to move upward synchronously. The block 64 will drive the telescopic sleeve rod 61 to move upward, and the upward movement of the telescopic sleeve rod 61 will make the friction concave disc 62 and the friction cone disc 55 close to each other. After the friction concave disc 62 and the friction cone disc 55 are in contact, the rotation of the friction cone disc 55 can drive the friction concave disc 62 to rotate, and the friction concave disc 62 will drive the telescopic sleeve rod 61 to rotate. When the telescopic sleeve rod 61 drives the inner rod 41 to rotate, the inner rod 41 will drive the outer rod 42 to rotate synchronously. At this time, the longitudinal pipe 9 clamped by the expansion adjustment device 4 will rotate, and then the position of the opening on the longitudinal pipe 9 will be adjusted, so that the axis of the opening on the longitudinal pipe 9 can be consistent with the axis of the openings on the two transverse pipes 91.

[0058] S5: When the operator sets the longitudinal pipe 9 on the expansion adjustment device 4, the positioning rod 71 can be rotated under the drive of the torsion spring 72, and the rotation of the positioning rod 71 drives the rotating frame 73 to rotate. When the rotating frame 73 rotates, it will drive the two articulated frames 76 to respectively move the first mounting frame 79 and the second mounting frame 710 relative to each other, and then drive the first detection frame 77 and the second detection frame 78 to clamp and limit the outer wall of the longitudinal pipe 9 through the first mounting rod 74 and the second mounting rod 75. The axis of the outer wall of the longitudinal pipe 9 at the opening is arranged in a plane. When the rotating device 5 drives the expansion adjustment device 4 to rotate the clamped longitudinal pipe 9, the outer wall of the longitudinal pipe 9 abuts against the first detection frame 77 and the second detection frame 78, and the first detection frame 77 and the second detection frame 78 cause the articulated frame 76 to drive the rotating frame 73 to deflect, and when the outer wall of the longitudinal pipe 9 is close to the opening When the plane at the axial position contacts the first detection frame 77 and the second detection frame 78, the deflection of the rotating frame 73 will drive the positioning rod 71 to rotate, and the rotation of the positioning rod 71 will cause the rotating cam 81 to rotate. At this time, the raised end of the rotating cam 81 will just move to contact the contact wheel 84. Driven by the rotating cam 81, the contact wheel 84 will cause the seesaw 82 to deflect on the support seat 14. When the seesaw 82 deflects, the other end of the seesaw 82 away from the contact wheel 84 will drive the trigger frame 85 to contact the positioning groove 86 on the friction cone 55, so that the trigger frame 85 can drive the friction cone 55 to move upward on the rotating rod 51. At this time, the friction cone 55 is separated from the friction concave plate 62, thereby stopping the rotation of the inner rod 41. After the inner rod 41 stops rotating, it is determined that the opening axis of the longitudinal pipe 9 is on the same axis as the first detection frame 77 and the second detection frame 78.

[0059] The above shows and describes the basic principles, main features and advantages of the present invention. Technical personnel in this industry should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A welding device for valve production, characterized in that: The invention comprises a processing table (1) arranged horizontally, wherein a placing table (11) is fixedly connected to the top of the processing table (1), a placing groove (12) for placing two transverse pipes (91) is provided in the placing table (11), a screw slide (13) is also arranged on the top of the processing table (1), a support seat (14) is arranged on the slide of the screw slide (13), the support seat (14) is located above the placing groove (12), a driving moving device (2) is arranged on the support seat (14), the driving moving device (2) is rotatably matched with the support seat (14), and a rotating device (2) is arranged on the support seat (14). An expansion adjustment device (4) is provided, the expansion adjustment device (4) is rotationally matched with the support seat (14), the drive moving device (2) and the expansion adjustment device (4) are transmission matched, the drive moving device (2) is also transmission-connected with a rotating device (5), the rotating device (5) and the drive moving device (2) are transmission matched, the expansion adjustment device (4) is provided with a connecting portion (6), the connecting portion (6) and the rotating device (5) are transmission matched, and a positioning device (7) is slidably provided on the support seat (14), and the positioning device (7) is located beside the expansion adjustment device (4).

2. A valve production welding device according to claim 1, characterized in that: The driving moving device (2) comprises a driving motor (21) fixedly connected to a support seat (14); the main shaft of the driving motor (21) is connected to a driving gear (22); a driving screw rod (23) is rotatably arranged on the support seat (14); a transmission gear (24) meshing with the driving gear (22) is fixedly connected to the driving screw rod (23); a limiting member (3) is spirally arranged on the driving screw rod (23); the limiting member (3) is slidably matched with the inner wall of the support seat (14); a moving plate (25) is hingedly arranged on the support seat (14); a first moving groove (26) and a second moving groove (27) are correspondingly opened on the moving plate (25); the limiting member (3) is in contact with the first moving groove (26); and the second moving groove (27) on the moving plate (25) is in transmission match with the expansion adjustment device (4).

3. A valve production welding device according to claim 2, characterized in that: The limiting member (3) comprises an outer shell (31) slidably arranged on the inner wall of the support seat (14), and limiting wheels (32) are rotatably arranged on both side walls of the outer shell (31), and the limiting wheels (32) are located in the first moving groove (26) in the moving plate (25), and a limiting cylinder (33) is rotatably arranged in the outer shell (31), and the limiting cylinder (33) is threadedly connected to the driving screw rod (23), and a plurality of limiting grooves (34) are evenly spaced around the circumference of the outer wall of the limiting cylinder (33). A limit block (35) is slidably arranged in the outer shell (31), the limit block (35) is engaged with a limit groove (34) on the limit cylinder (33), an extrusion spring (36) is connected between the limit block (35) and the outer shell (31), a fixing rod (37) is fixedly connected to the limit block (35), a limit plate (38) is slidably arranged on the outer shell (31), a V-shaped inclined groove (39) is formed on the limit plate (38), and the fixing rod (37) contacts the V-shaped inclined groove (39).

4. A valve production welding device according to claim 3, characterized in that: The expansion adjustment device (4) comprises an inner rod (41) rotatably arranged on a support seat (14), an outer rod (42) being clamped on the inner rod (41), a fixing ring (43) being fixedly connected to the outer wall of the outer rod (42), a rotating chuck (44) being rotatably arranged on the support seat (14), the rotating chuck (44) being clamped and matched with the outer rod (42), and slide grooves (45) being arranged opposite to each other on the rotating chuck (44), an expansion frame (46) being slidably arranged in each slide groove (45) on the rotating chuck (44), and the expansion frame (46) A connecting frame (47) is hingedly provided on the upper side correspondingly, and the other ends of the two connecting frames (47) away from the expansion frame (46) are respectively hingedly matched with the fixing ring (43) on the outer rod (42), and the outer rod (42) is provided with a clamping groove (48), and two clamping blocks (49) are rotatably provided in the clamping groove (48), and a clamping frame (410) is connected to the two clamping blocks (49), and the clamping frame (410) is slidably matched with the support seat (14), and a clamping wheel (411) is extended from the clamping frame (410) toward the second movable groove (27) on the movable plate (25).

5. A valve production welding device according to claim 4, characterized in that: The rotating device (5) comprises a rotating rod (51) rotatably connected to a support seat (14); a rotating disk (52) is fixedly connected to the rotating rod (51); a driving disk (53) is also fixedly connected to the driving screw rod (23); a driving belt (54) is sleeved between the driving disk (53) and the rotating disk (52); a friction cone disk (55) is clamped on the rotating rod (51); a pressure spring (56) is sleeved on the rotating rod (51); two ends of the pressure spring (56) are respectively connected to the upper end surface of the friction cone disk (55) and the support seat (14).

6. A valve production welding device according to claim 5, characterized in that: The connecting portion (6) on the expansion adjustment device (4) comprises a telescopic sleeve rod (61) telescopically arranged at the end of the inner rod (41), the telescopic sleeve rod (61) being provided with a friction concave disc (62) for friction transmission with the friction cone disc (55), the telescopic sleeve rod (61) being provided with an annular groove (63), a ring block (64) being rotatably arranged in the annular groove (63) and being relatively arranged, and the ring block (64) being connected to the clamping frame (410).

7. A valve production welding device according to claim 6, characterized in that: The positioning device (7) comprises a positioning rod (71) rotatably arranged on a support seat (14); a torsion spring (72) is sleeved on the positioning rod (71); two ends of the torsion spring (72) are respectively connected to the positioning rod (71) and the support seat (14); a rotating frame (73) is fixedly connected to the bottom of the positioning rod (71); a first mounting rod (74) is slidably arranged on the support seat (14); a second mounting rod (75) is slidably arranged on the support seat (14); one end of the two first mounting rods (74) is fixedly mounted on the support seat (14); A first mounting frame (79) is connected, one end of the two second mounting rods (75) is fixedly connected to the second mounting frame (710), the first mounting frame (79) and the second mounting frame (710) are respectively located on both sides of the rotating frame (73), an articulated frame (76) is hingedly connected between the first mounting frame (79) and the second mounting frame (710) and the rotating frame (73), the other ends of the two first mounting rods (74) are fixedly connected to the first detection frame (77), and the other ends of the two second mounting rods (75) are fixedly connected to the second detection frame (78).

8. A valve production welding device according to claim 7, characterized in that: The positioning device (7) is also provided with a trigger member (8), the trigger member (8) comprising a rotating convex disc (81) fixedly connected to one end of the positioning rod (71) away from the hinge frame (76), a seesaw (82) is hingedly provided on the support seat (14), a connecting spring (83) is provided between the seesaw (82) and the support seat (14), a contact wheel (84) is provided at one end of the seesaw (82) to rotate in the direction of the rotating convex disc (81), a trigger frame (85) is hingedly provided at one end of the seesaw (82) away from the contact wheel (84), a positioning groove (86) is provided on the friction cone disc (55), and the trigger frame (85) is engaged and rotated with the positioning groove (86) on the friction cone disc (55).

9. A method for using a welding device for valve production, using the welding device for valve production as claimed in any one of claims 1 to 8, characterized in that: The steps include: S1: When the expansion adjustment device (4) is controlled to expand and support the longitudinal pipe (9), the driving motor (21) drives the driving gear (22) to rotate, and the rotation of the driving gear (22) drives the transmission gear (24) to rotate. The rotation of the transmission gear (24) causes the driving screw rod (23) to rotate. At this time, the limit block (35) is engaged with the limit groove (34) in the limit cylinder (33), and the outer shell (31) limits the rotation of the limit cylinder (33). Therefore, when the driving screw rod (23) rotates, it can drive the limit cylinder (33) that is spirally matched. The outer shell (31) is moved downward. After the outer shell (31) is moved downward, the limiting wheels (32) arranged on the two side walls of the outer shell (31) will drive the first moving groove (26) to deflect the moving plate (25) on the support seat (14). Since the moving plate (25) is hingedly arranged on the support seat (14), when the moving plate (25) is deflected, the other side of the moving plate (25) on which the second moving groove (27) is arranged will move upward, and then the expansion adjustment device (4) will move upward through the second moving groove (27) to support the expansion of the longitudinal pipe (9); S2: As the driving screw rod (23) continues to rotate, the driving screw rod (23) will drive the limiting cylinder (33) to make the outer shell (31) continue to move downward. When the outer shell (31) continues to move downward and is about to contact the bottom of the support seat (14), the limiting plate (38) arranged on the outer shell (31) will contact the bottom of the support seat (14). At this time, the bottom of the support seat (14) will squeeze the limiting plate (38), and the limiting plate (38) will move toward the inner side of the outer shell (31). The V-shaped inclined groove (39) arranged on the limiting plate (38) will drive the fixing rod (37) on the limiting block (35) to move. At this time, the limiting block (35) moves in a direction away from the limiting cylinder (33). When the stop block (35) is moved, the stop block (35) will be disengaged from the stop groove (34) on the stop cylinder (33). When the stop block (35) is disengaged from the stop groove (34) on the stop cylinder (33), the stop cylinder (33) is no longer limited by the stop block (35). When the driving screw rod (23) rotates, the stop cylinder (33) will be driven to idle in the outer shell (31). When the outer shell (31) moves to contact with the support seat (14), the moving plate (25) will be driven to deflect, so that after the expansion adjustment device (4) expands the longitudinal pipe (9), the continuous expansion of the longitudinal pipe (9) is stopped, thereby avoiding damage to the device caused by overload of the expansion adjustment device (4) and the driving moving device (2). S3: When the driving screw rod (23) drives the limiting member (3) to move downward, the limiting member (3) drives the first moving groove (26) on the moving plate (25) to deflect the moving plate (25), and when the moving plate (25) deflects, the second moving groove (27) on the moving plate (25) drives the clamping wheel (411) on the clamping frame (410) to move the clamping frame (410) upward, and the upward movement of the clamping frame (410) drives the two clamping blocks (49) to move upward, and the two clamping blocks (49) 9) is in the clamping groove (48) on the outer rod (42), so that the outer rod (42) can move upward. When the outer rod (42) moves upward, the outer rod (42) drives the connecting frame (47) to move the expansion frame (46) toward the inner wall of the longitudinal pipe (9). The expansion frame (46) moves to the inner wall of the longitudinal pipe (9) under the restriction of the sliding groove (45) on the rotating chuck (44) and is closely attached to the inner wall of the longitudinal pipe (9), thereby expanding and clamping the inner wall of the longitudinal pipe (9); S4: The driving screw rod (23) is driven to rotate and drive the driving disk (53) to rotate. The driving disk (53) rotates through the driving belt (54) so ​​that the rotating disk (52) can drive the rotating rod (51) to rotate. The friction cone disk (55) is clamped and arranged on the rotating rod (51). When the rotating rod (51) rotates, the friction cone disk (55) can be driven to rotate. When the second moving groove (27) on the moving plate (25) drives the clamping frame (410) to move upward, the clamping frame (410) moves upward and drives the outer rod (42) to move upward through the clamping block (49). After the outer rod (42) moves upward, it drives the expansion frame (46) to clamp and limit the inner wall of the longitudinal pipe (9). When the clamping frame (410) moves upward, the ring block (64) on the clamping frame (410) is driven to move upward synchronously. The ring block (64) drives the telescopic sleeve (61) to move upward, and the upward movement of the telescopic sleeve (61) causes the friction concave disc (62) to be in close contact with the friction cone disc (55). When the friction concave disc (62) and the friction cone disc (55) are in contact, the rotation of the friction cone disc (55) can drive the friction concave disc (62) to rotate, and the friction concave disc (62) drives the telescopic sleeve (61) to rotate. When the telescopic sleeve (61) drives the inner rod (41) to rotate, the inner rod (41) drives the outer rod (42) to rotate synchronously. At this time, the longitudinal pipe (9) clamped by the expansion adjustment device (4) rotates, thereby adjusting the position of the opening on the longitudinal pipe (9) so that the axis of the opening on the longitudinal pipe (9) can be consistent with the axis of the opening on the two transverse pipes (91); S5: When the operator sleeves the longitudinal pipe (9) on the expansion adjustment device (4), the positioning rod (71) can be rotated under the drive of the torsion spring (72), and the rotation of the positioning rod (71) drives the rotating frame (73) to rotate. When the rotating frame (73) rotates, it drives the two hinged frames (76) to respectively move the first mounting frame (79) and the second mounting frame (710) relative to each other, and then drives the first detection frame (77) and the second detection frame (78) through the first mounting rod (74) and the second mounting rod (75). ) clamps and limits the outer wall of the longitudinal pipe (9), and the outer wall of the longitudinal pipe (9) is arranged in a plane at the axis of the opening. When the rotating device (5) drives the expansion adjustment device (4) to rotate the clamped longitudinal pipe (9), the outer wall of the longitudinal pipe (9) abuts against the first detection frame (77) and the second detection frame (78), and the first detection frame (77) and the second detection frame (78) cause the hinge frame (76) to drive the rotating frame (73) to deflect, and when the outer wall of the longitudinal pipe (9) abuts against the opening, the outer wall of the longitudinal pipe (9) abuts against the first detection frame (77) and the second detection frame (78). When the plane at the axis position contacts the first detection frame (77) and the second detection frame (78), the rotation of the rotating frame (73) drives the positioning rod (71) to rotate, and the rotation of the positioning rod (71) causes the rotating convex plate (81) to rotate. At this time, the protruding end of the rotating convex plate (81) just moves to contact the contact wheel (84). Driven by the rotating convex plate (81), the contact wheel (84) causes the seesaw (82) to deflect on the support seat (14). When the seesaw (82) deflects, the seesaw (82) The other end away from the abutment wheel (84) drives the trigger frame (85) to contact the positioning groove (86) on the friction cone (55), so that the trigger frame (85) can drive the friction cone (55) to move upward on the rotating rod (51). At this time, the friction cone (55) is separated from the friction concave plate (62), thereby stopping the rotation of the inner rod (41). After the inner rod (41) stops rotating, it is determined that the opening axis of the longitudinal pipe (9) is on the same axis as the first detection frame (77) and the second detection frame (78).

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