Ship pipe fitting assembling and welding tool

Abstract

The invention relates to the technical field of pipe fitting assembling tools, and discloses a ship pipe fitting assembling and welding tool which comprises a welding table, moving seats are movably connected to the two sides of the upper end of the welding table in a sliding mode, and bottom supporting assemblies used for containing to-be-welded pipe fittings and outer side clamping assemblies engaged with the bottom supporting assemblies are arranged on the moving seats; an inner side clamping assembly is installed at the outer side end of the bottom supporting assembly through a support assembly, and a buffering assembly is further arranged on the support assembly. Through the structural design of'self-weight triggering linkage clamping 'and the synergistic effect of the bottom supporting assembly, the outer side clamping assembly and the inner side clamping assembly, a positioning structure of'inner supporting and outer clamping' is formed, it is guaranteed that the inner wall and the outer wall of a pipe fitting are synchronously positioned, the coaxiality of the pipe fitting can be effectively guaranteed, radial deviation in the welding process is avoided, the repair rate is remarkably reduced, and the welding quality is improved. According to the pipe fitting clamping device, a pipe fitting only needs to be placed on the supporting rollers, full-process linkage clamping can be triggered through self weight, and complex manual operation is not needed.

Description

Technical Field

[0001] This invention relates to the field of pipe fitting assembly tooling technology, specifically a welding tooling for assembling marine pipe fittings. Background Technology

[0002] In shipbuilding, piping system processing and installation account for approximately 30% of the overall construction workload. As core components of the piping system, the welding quality of ship pipe fittings directly affects the safety and stability of the ship's navigation. Welding ship pipe fittings requires extremely high standards for coaxiality and clamping stability. Traditional welding fixtures present numerous technical challenges in practical applications. Existing tooling often requires manual measurement and positioning or visual inspection for alignment, making it difficult to accurately control the coaxiality of pipe fittings. This can easily lead to weld joint misalignment and deformation, increasing rework rates and production costs. Especially for large-diameter and long pipe fittings, manual coaxiality correction is cumbersome and cannot meet high-standard welding requirements.

[0003] Some tooling uses multiple independently driven clamping mechanisms, requiring step-by-step control to fix the pipe fittings, making the clamping process cumbersome. Furthermore, it lacks an automatic reset function, requiring manual adjustment and reset after pipe fitting placement. This results in complex and inefficient operations when changing pipe fittings before and after welding using traditional tooling. To address this, we have introduced a new type of welding tooling for assembling marine pipe fittings. Summary of the Invention

[0004] The purpose of this invention is to provide a welding fixture for assembling ship pipe fittings to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A welding fixture for assembling marine pipe fittings includes a welding table, on which movable seats are movably slidably connected on both sides of the upper end of the welding table. The movable seats are provided with a bottom support assembly for placing the pipe fitting to be welded and an outer clamping assembly that engages with the bottom support assembly. The outer end of the bottom support component is equipped with an inner clamping component by a bracket assembly, and the bracket assembly is also provided with a buffer component; The pipe to be welded is placed on the bottom support assembly. Under the gravity of the pipe to be welded, the bottom support assembly moves downward, driving the outer clamping assembly to rotate and close, and then clamping it onto the outer wall of the pipe to be welded. At the same time, the outer clamping assembly rotates and closes to contact the buffer assembly, causing the buffer assembly to drive the inner clamping assembly to rotate and open, and then clamp it onto the inner wall of the pipe to be welded.

[0006] Preferably, the upper end of the welding platform is provided with a slide rail for sliding the movable seat, and an adjusting cylinder is fixed in the middle on both sides of the upper end of the welding platform, with the piston rod inside the adjusting cylinder connected to the movable seat.

[0007] Preferably, a reset cylinder is centrally arranged in the moving seat, the bottom support assembly comprises a support, a support roller arranged at the upper end of the support, a lifting column centrally arranged at the bottom of the support, and a vertical rack fixed at the four corners of the support; A bottom disc is fixed at the bottom of the lifting column and extends into the reset cylinder, and the top of a reset spring in the reset cylinder is fixed to the lower end of the bottom disc.

[0008] Preferably, a vertical slot for slidingly connecting with the vertical rack is further arranged on the moving seat. The outer clamping assembly comprises a rotating shaft extending through the vertical slot, two sets of gears fixed on the rotating shaft, and clamping arms fixed at the two ends of the rotating shaft. The gears are arranged in the vertical slot and mesh with the corresponding vertical rack.

[0009] Preferably, a clamping wheel is movably arranged on the end of the clamping arm through an axle, a motor is further fixed on the corresponding clamping arm, a first pulley is connected to the output end of the motor, a second pulley is fixed at one end of the axle and extends out of the clamping arm, and a belt is connected between the first pulley and the second pulley.

[0010] Preferably, the support assembly comprises a horizontal plate fixed at the outer end of the bottom support assembly, and a vertical abutting plate fixed at the top of the end of the horizontal plate, and a reinforcing rib is arranged at the connection between the horizontal plate and the vertical abutting plate. The buffer assembly comprises a buffer cylinder fixed on the horizontal plate in a front-rear symmetrical manner, an abutting rod connected to the output end of the buffer cylinder, a buffer disc fixed at the end of the abutting rod extending into the buffer cylinder, and a buffer spring connected between the buffer cylinder and the buffer disc.

[0011] Preferably, the inner clamping assembly comprises a drive cylinder fixed at the inner end of the vertical abutting plate, a connecting cylinder fixed at the end of the drive cylinder, an opening and closing plate movably connected to the end of the connecting cylinder through a pin shaft, and a ball movably connected to the end of the opening and closing plate outside through a bowl-shaped ball seat. A cross-shaped connecting plate is fixed at the end of the drive rod of the drive cylinder extending into the connecting cylinder, and the inner end of the opening and closing plate slides on the cross-shaped connecting plate. The buffer cylinder is connected to the drive cylinder through a conduit.

[0012] Preferably, a drive piston is fixed at one end of the drive rod extending into the drive cylinder, and a tension spring in the drive cylinder is fixed to the drive piston. The end of the connecting cylinder is equally spaced with mounting grooves, and the pin shaft is used to movably connect the rotating cylinder to the mounting grooves, the inner end of the opening and closing plate is fixed with a connecting arm through the rotating cylinder, the end of the connecting arm is fixed with a sliding rod, and the sliding rod slides in a sliding groove on the cross-shaped connecting plate.

[0013] Compared with the prior art, the beneficial effects of the present application are: through the "self-weight triggering linkage clamping" structure design, the synergistic effect of the bottom support assembly, the outer clamping assembly and the inner clamping assembly, the positioning structure of "inner support and outer clamping" is formed, the synchronous positioning of the inner wall and the outer wall of the pipe fitting is ensured, the coaxiality of the pipe fitting can be effectively guaranteed, the radial deviation in the welding process is avoided, the repair rate is significantly reduced, and the welding quality is improved.

[0014] The present application only needs to place the pipe fitting on the supporting roller, and the whole process of linkage clamping can be triggered through the self-weight, without complex manual operation; after welding is completed, the reset spring and the buffer spring automatically drive each component to reset, without manual intervention, and the clamping and resetting time is greatly shortened. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the initial state of the present application; Figure 2 It is an exploded structural schematic diagram of the moving seat, the bottom support assembly, the inner clamping assembly and the outer clamping assembly of the present application; Figure 3 It is a schematic diagram of the three-dimensional structure of the outer clamping assembly of the present application; Figure 4 It is a schematic diagram of the three-dimensional structure of the bottom support assembly, the inner clamping assembly and the buffer assembly of the present application; Figure 5 It is a schematic diagram of the three-dimensional structure of the inner clamping assembly in the initial state of the present application; Figure 6 It is a schematic diagram of the three-dimensional structure of the present application, Figure 2 the overall assembled three-dimensional structure; Figure 7 It is a schematic diagram of the three-dimensional structure of the present application Figure 6 the three-dimensional structure from another perspective; Figure 8 It is a schematic diagram of the three-dimensional structure of the present application when the pipe fitting to be welded is hoisted above the bottom support assembly; Figure 9 It is a schematic diagram of the three-dimensional structure of the present application Figure 8 the sectional structure; Figure 10 It is a schematic diagram of the three-dimensional structure of the present application when the pipe fitting to be welded is completely placed on the bottom support assembly; Figure 11 It is a schematic diagram of the three-dimensional structure of the present application Figure 10 the sectional structure; Figure 12 It is a schematic diagram of the side view structure of the present application after the pipe fitting to be welded is clamped and positioned; Figure 13 It is a schematic diagram of the sectional structure of the present application Figure 10 the local sectional structure; Figure 14The schematic diagram of the three-dimensional structure of the bottom supporting assembly, the inner clamping assembly and the outer clamping assembly after the pipe to be welded is clamped and positioned; Figure 15 The schematic diagram of the three-dimensional structure when the pipe to be welded is welded; Figure 16 The schematic diagram of the side view structure of the two groups of supporting rollers distributed in front and back for supporting the pipe to be welded.

[0016] In the figure: 1, welding table; 2, slide rail; 3, adjusting cylinder body; 4, moving seat; 5, bottom supporting assembly; 501, lifting column; 502, support; 503, supporting roller; 504, vertical rack; 505, bottom disc; 506, return spring; 6, inner clamping assembly; 601, driving cylinder body; 603, connecting barrel; 604, opening and closing plate; 605, ball; 606, driving rod; 607, driving piston; 608, tension spring; 609, cross connecting plate; 610, sliding groove; 611, sliding rod; 612, connecting arm; 613, rotating barrel; 614, pin shaft; 615, bowl-shaped ball seat; 7, outer clamping assembly; 701, rotating shaft; 702, gear; 703, clamping arm; 704, clamping wheel; 705, motor; 706, first belt pulley; 707, belt; 708, second belt pulley; 8, piston rod; 9, return cylinder body; 10, vertical groove; 11, buffer cylinder body; 12, abutting rod; 13, horizontal plate; 14, reinforcing rib; 15, vertical abutting plate; 16, guide pipe; 17, pipe to be welded; 18, buffer disc; 19, buffer spring. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0018] Embodiment: Please refer to Figures 1-16 The present application provides a technical solution: The utility model provides a kind of ship pipe fitting assembly welding tool, including welding table 1, mobile seat 4 is movably slid on the upper end both sides of welding table 1, the upper end of welding table 1 is equipped with slide rail 2 for sliding mobile seat 4, the upper end of welding table 1 is fixed with the adjusting cylinder body 3 in the middle of both sides, the piston rod 8 in adjusting cylinder body 3 is connected to mobile seat 4, adjusting cylinder body 3 is the hydraulic cylinder or electric cylinder or air cylinder to meet the use model.Adjusting cylinder body 3 is the hydraulic cylinder or electric cylinder or air cylinder to meet the use model.

[0019] After being hung off, the reset spring 506 can automatically push the bottom support assembly 5 and the outer clamping assembly 7 to reset, without manual operation, improving the clamping efficiency.

[0020] The support rollers 503 on the upper end of the support base 502 can be arranged in two groups (as shown in Figure 6 、 Figure 12 、 Figure 13 indicated), which can support the pipe to be welded, facilitating the hoisting and placing of the pipe to be welded. Figure 16 The support rollers 503 can also be arranged in two groups (as shown in

[0021] The mobile seat 4 is also provided with a vertical slot 10 for sliding the vertical rack 504, and the outer clamping assembly 7 includes a rotating shaft 701 that extends through the vertical slot 10, two sets of gears 702 fixed on the rotating shaft 701, and clamping arms 703 fixed at both ends of the rotating shaft 701.

[0022] The gear and rack transmission is precise and stable: the gear and rack transmission gap is small, which can ensure the precise control of the rotating angle of the clamping arm 703, avoiding the shaking of the pipe during clamping.

[0023] The clamping arm 703 is centrally provided with a wheel shaft movably mounted clamping wheel 704, and the corresponding clamping arm 703 is also fixed with a motor 705, the output end of the motor 705 is connected with a first belt pulley 706, the wheel shaft is fixed with a second belt pulley 708 at one end extending out of the clamping arm 703, and the first belt pulley 706 and the second belt pulley 708 are connected with a belt 707.

[0024] The integrated rotary drive function realizes continuous welding: the clamping wheel 704 is driven to rotate by the motor 705, which can drive the pipe to be welded 17 to rotate synchronously, so that the circumferential welding can be completed without manual overturning, and the welding efficiency is improved.

[0025] The clamping wheel 704 contacts and reduces the surface damage of the pipe to be welded 17: the clamping wheel 704 is in rolling contact with the outer wall of the pipe to be welded 17, which can reduce scratches and extrusion deformation on the surface of the pipe, and protect the appearance quality of the pipe.

[0026] The outer side end of the bottom support assembly 5 is provided with an inner clamping assembly 6 by a support assembly, and the support assembly is also provided with a buffer assembly. The support assembly includes a horizontal plate 13 fixed at the outer side end of the bottom support assembly 5 and a vertical abutting plate 15 fixed at the top end of the horizontal plate 13. The connection between the horizontal plate 13 and the vertical abutting plate 15 is provided with a reinforcing rib 14. The buffer assembly includes a buffer cylinder 11 symmetrically fixed on the horizontal plate 13, a abutting rod 12 connected to the output end of the buffer cylinder 11, a buffer disc 18 fixed after the abutting rod 12 extends into the buffer cylinder 11, and a buffer spring 19 connected between the buffer cylinder 11 and the buffer disc 18.

[0027] The inner clamping assembly 6 includes a drive cylinder 601 fixed at the inner side end of the vertical abutting plate 15, a connecting cylinder 603 fixed at the end of the drive cylinder 601, an opening and closing plate 604 movably connected with a pin shaft 614 at the end of the connecting cylinder 603, a ball 605 movably connected with a bowl-shaped ball seat 615 at the outer side end of the opening and closing plate 604, a drive rod 606 of the output end of the drive cylinder 601 extending into the connecting cylinder 603 and fixed with a cross connecting plate 609, and the inner side end of the opening and closing plate 604 slidingly connected with the cross connecting plate 609. The buffer cylinder 11 is connected to the drive cylinder 601 by a conduit 16.

[0028] One end of the drive rod 606 extends into the drive cylinder 601 and is fixed with a drive piston 607. A tension spring 608 in the drive cylinder 601 is fixed with the drive piston 607. The end of the connecting cylinder 603 is provided with installation grooves at equal intervals, and the pin shaft 614 is used to movably connect the rotating cylinder 613 with the installation grooves. The inner side end of the opening and closing plate 604 is fixed with a connecting arm 612 through the rotating cylinder 613. The end of the connecting arm 612 is fixed with a sliding rod 611, and the sliding rod 611 is slidingly connected in a sliding groove 610 on the cross connecting plate 609.

[0029] The diameter of the connecting cylinder 603 is smaller than the inner diameter of the pipe to be welded 17. In the initial state as shown in FIG. 1, the opening and closing plate 604 is closed, so that the pipe to be welded 17 can be hoisted and the inner side clamping assembly 6 can be smoothly inserted into the inside of the pipe to be welded 17. Figure 6 and Figure 7 In the initial state as shown in FIG. 1, the opening and closing plate 604 is closed, so that the pipe to be welded 17 can be hoisted and the inner side clamping assembly 6 can be smoothly inserted into the inside of the pipe to be welded 17.

[0030] The hydraulic linkage between the buffer cylinder 11 and the driving cylinder 601 can achieve smooth force transmission, so that the opening force of the opening and closing plate 604 is uniformly distributed on the inner wall of the pipe to be welded 17, avoiding excessive local stress that causes pipe deformation.

[0031] The buffer spring 19 can buffer the extrusion impact of the clamping arm 703 against the abutting rod 12, avoiding structure wear or damage caused by rigid collision, and prolonging the service life of the equipment.

[0032] The ball 605 at the end of the opening and closing plate 604 is in rolling contact with the inner wall of the pipe to be welded 17, which not only ensures the stability of support, but also reduces the friction resistance during rotary welding of the pipe to be welded 17.

[0033] The pipe to be welded 17 is placed on the bottom support assembly 5. Under the action of the gravity of the pipe to be welded 17, the bottom support assembly 5 moves downward, driving the outer side clamping assembly 7 to rotate and close to clamp on the outer wall of the pipe to be welded 17. At the same time, the outer side clamping assembly 7 rotates and closes to contact the buffer assembly, so that the buffer assembly drives the inner side clamping assembly 6 to rotate and open to clamp on the inner wall of the pipe to be welded 17.

[0034] Only the weight of the pipe to be welded 17 can trigger the linkage clamping action of the "outer clamping and inner supporting", without the need to configure a complex electrical control system, thereby reducing the cost and failure rate of the equipment.

[0035] The clamping force is positively correlated with the weight of the pipe to be welded 17. The larger the pipe diameter and the heavier the weight, the stronger the clamping force. At the same time, the opening angle of the opening and closing plate 604 can be adjusted adaptively with the change of the pipe diameter, so as to adapt to the clamping of ship pipes of various specifications.

[0036] The inner supporting and outer clamping cooperate to ensure the stability of clamping. The outer wall clamping and the inner wall supporting are performed synchronously, which can effectively prevent the pipe from being offset or deformed in the radial direction during welding, ensure the coaxiality of the welded joint, and improve the welding quality.

[0037] Specifically, in use: The tooling is used for quick clamping and positioning of ship pipe welding. The core triggers the linkage action of the bottom support assembly 5, the outer side clamping assembly 7 and the inner side clamping assembly 6 through the weight of the pipe to be welded 17, realizes the synchronous adaptive clamping of the outer wall and the inner wall of the pipe, ensures the coaxiality and stability of the pipe during welding, and the specific working process is as follows: The pipe to be welded 17 is hoisted above the bottom support assembly 5, and the inner clamping assembly 6 is inserted into the pipe to be welded 17, and then the pipe to be welded 17 is placed on the end of the support roller 503 of the bottom support assembly 5 on the moving seat 4.

[0038] Under the action of gravity of the pipe to be welded 17, the support 502 drives the lifting column 501 to move downward, compresses the reset spring 506 inside the reset cylinder 9, and makes the bottom disc 505 at the bottom of the support 502 move downward along the inner wall of the reset cylinder 9; at the same time, the vertical rack 504 at the four corners of the support 502 synchronously slides downward along the vertical slot 10 on the moving seat 4.

[0039] The outer clamping assembly 7 is linked and closed to clamp the outer wall of the pipe to be welded 17: when the vertical rack 504 moves downward, it meshes with the gear 702 of the outer clamping assembly 7 to drive the rotation shaft 701 to rotate along the through part of the vertical slot 10, and the rotation shaft 701 drives the clamping arms 703 at both ends to rotate upward and close, until the clamping wheels 704 at the ends of the clamping arms 703 abut against the outer wall of the pipe to be welded 17, completing the preliminary clamping of the outer wall of the pipe to be welded 17.

[0040] The buffer assembly is triggered to drive the inner clamping assembly 6 to open and clamp the inner wall of the pipe to be welded 17: during the process of the clamping arms 703 rotating upward and closing, the side wall thereof contacts and extrudes the abutting rod 12 of the buffer assembly, so that the abutting rod 12 moves into the buffer cylinder 11, and pushes the buffer disc 18 to compress the buffer spring 19.

[0041] The fluid inside the buffer cylinder 11 is delivered to the drive cylinder 601 of the inner clamping assembly 6 through the conduit 16, pushes the drive piston 607 to stretch the tension spring 608 and drives the drive rod 606 to extend outward.

[0042] The cross connecting plate 609 at the end of the drive rod 606 moves outward, the sliding rod 611 at the end of the connecting arm 612 slides along the sliding groove 610 on the cross connecting plate 609, and the opening and closing plate 604 is driven to rotate outward and open around the pin shaft 614.

[0043] When the ball 605 at the end of the opening and closing plate 604 abuts against the inner wall of the pipe to be welded 17, the clamping of the inner wall of the pipe to be welded 17 is completed, and at this time, the bottom support assembly 5, the outer clamping assembly 7 and the inner clamping assembly 6 form a clamping structure of "inner support and outer clamping", which ensures the coaxiality of the pipe.

[0044] The adjusting cylinder 3 on both sides of the welding platform 1 is started, the moving seat 4 is driven to slide along the slide rail 2 through the extension and retraction of the piston rod 8, the distance between the two groups of moving seats 4 is adjusted, the pipe fitting clamping requirements of different lengths of ships are adapted, the weld spacing between the pipe fittings 17 to be welded is adjusted, and the motor 705 can be started during the welding process, the clamping wheel 704 is driven to rotate through the transmission of the first belt pulley 706, the belt 707 and the second belt pulley 708, and then the pipe fitting 17 to be welded is rotated, and the circumferential continuous welding of the pipe fitting 17 to be welded is realized.

[0045] When the pipe fitting 17 to be welded is rotated, the part of the ball 605 protruding from the bowl-shaped ball seat 615 abuts against the inner wall of the pipe fitting 17 to be welded, and under the action of friction, the ball 605 can rotate in the bowl-shaped ball seat 615 at the end of the opening and closing plate 604, so that the pipe fitting 17 to be welded can be clamped while rotating.

[0046] After the welding is completed, the pipe fitting 17 to be welded is lifted away from the supporting roller 503, the elastic restoring force of the reset spring 506 pushes the bottom disc 505 to move upwards, drives the vertical rack 504 to slide upwards, and the clamping arm 703 is reset by the gear and rack engagement transmission. At the same time, the buffer spring 19 pushes the buffer disc 18 to reset, the tension spring 608 in the cylinder body 601 pulls the driving piston 607 to reset, the opening and closing plate 604 is folded inward, and the clamping of the next group of pipe fittings is waited.

[0047] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A welding fixture for assembling marine pipe fittings, comprising a welding table, characterized in that: The upper end of the welding platform is movably slidably connected to two movable seats on both sides. The movable seats are provided with a bottom support assembly for placing the pipe fitting to be welded and an outer clamping assembly that engages with the bottom support assembly. The outer end of the bottom support component is equipped with an inner clamping component by a bracket assembly, and the bracket assembly is also provided with a buffer component; The pipe to be welded is placed on the bottom support assembly. Under the gravity of the pipe to be welded, the bottom support assembly moves downward, driving the outer clamping assembly to rotate and close, and then clamping it onto the outer wall of the pipe to be welded. At the same time, the outer clamping assembly rotates and closes to contact the buffer assembly, causing the buffer assembly to drive the inner clamping assembly to rotate and open, and then clamp it onto the inner wall of the pipe to be welded.

2. The welding fixture for assembling ship pipe fittings according to claim 1, characterized in that: The upper end of the welding platform is provided with a slide rail for sliding the movable seat. Adjustment cylinders are fixed in the middle on both sides of the upper end of the welding platform, and the piston rod inside the adjustment cylinder is connected to the movable seat.

3. The welding fixture for assembling marine pipe fittings according to claim 1, characterized in that: The movable seat has a reset cylinder in the center, and the bottom support assembly includes a support, a support roller at the upper end of the support, a lifting column at the center of the bottom of the support, and vertical racks fixed at the four corners of the support. The bottom of the lifting column extends into the reset cylinder and is fixed with a bottom plate. The top of the reset spring inside the reset cylinder is fixed to the lower end of the bottom plate.

4. The welding fixture for assembling marine pipe fittings according to claim 3, characterized in that: The movable seat is also provided with a vertical groove for sliding the vertical rack; The outer clamping assembly includes a rotating shaft extending through a vertical slot, two sets of gears fixed on the rotating shaft, and clamping arms fixed at both ends of the rotating shaft. The gear is located in a vertical slot and meshes with the corresponding vertical rack.

5. The welding fixture for assembling marine pipe fittings according to claim 4, characterized in that: The clamping arm has a clamping wheel movably mounted on its end via an axle. A motor is also fixed on the corresponding clamping arm. The output end of the motor is connected to a first pulley. One end of the axle extends out of the clamping arm and is fixed to a second pulley. A belt connects the first pulley and the second pulley.

6. The welding fixture for assembling marine pipe fittings according to claim 1, characterized in that: The support assembly includes a horizontal plate fixed to the outer end of the bottom support assembly and a vertical abutment plate fixed to the top of the end of the horizontal plate. The connection between the horizontal plate and the vertical abutment plate is provided with reinforcing ribs. The buffer assembly includes a buffer cylinder symmetrically fixed to a horizontal plate, a stop rod connected to the output end of the buffer cylinder, a buffer disc fixed after the stop rod extends into the buffer cylinder, and a buffer spring connected between the inside of the buffer cylinder and the buffer disc.

7. The welding fixture for assembling marine pipe fittings according to claim 6, characterized in that: The inner clamping assembly includes a drive cylinder fixed to the inner end of the vertical abutment plate, a connecting cylinder fixed to the end of the drive cylinder, an opening and closing plate movably connected to the end of the connecting cylinder by a pin, and balls movably connected to the outer side of the end of the opening and closing plate by a bowl-shaped ball seat. The drive rod at the output end of the drive cylinder extends into the cross connecting plate fixed behind the connecting cylinder, and the inner end of the opening and closing plate slides into the cross connecting plate. The buffer cylinder is connected to the drive cylinder via a conduit.

8. The welding fixture for assembling ship pipe fittings according to claim 7, characterized in that: One end of the drive rod extends into the drive cylinder and is fixed to the drive piston. The tension spring inside the drive cylinder is fixed to the drive piston. The connecting cylinder has mounting grooves evenly spaced at its end, and a pin is used to movably connect the rotating cylinder to the mounting groove. The inner end of the opening and closing plate is fixed with a connecting arm through the rotating cylinder, and a sliding rod is fixed at the end of the connecting arm. The sliding rod slides in the sliding groove on the cross connecting plate.

Images