A clamping device for welding a special-shaped pipe

Abstract

The application discloses a clamping device for welding special-shaped pipe fittings and belongs to the technical field of welding devices, which comprises a clamping cylinder, an insertion cylinder, a movable bearing table, a centering and clamping assembly and a supporting base. An inner support clamping mechanism is arranged in the clamping cylinder. An extrusion top block is arranged above the clamping cylinder. The inner support clamping mechanism is triggered to expand by the extrusion top block penetrating through the vertical pipe and abutting against the inner wall of the horizontal pipe to calibrate and clamp the splicing part of the tee pipe to be assembled. The top of the insertion cylinder is connected with the bottom of the clamping cylinder. A locking mechanism is arranged in the insertion cylinder. The locking mechanism cooperates with the inner support clamping mechanism to lock and release the clamping state of the inner support clamping mechanism. The supporting base is connected with the bottom of the insertion cylinder through a straight rod. The movable bearing table is movably sleeved on the straight rod and elastically abuts against the bottom of the insertion cylinder. The centering and clamping assembly is arranged on the movable bearing table and is used for centering and calibrating the vertical pipe.

Description

Technical Field

[0001] This invention belongs to the field of welding equipment technology, specifically referring to a clamping device for welding irregularly shaped pipe fittings. Background Technology

[0002] In the processing of irregular pipe fittings, the tee pipe is the most widely used type of pipe joint, and its welding assembly is a common process in production. The tee pipe is composed of vertical pipes and horizontal pipes spliced ​​vertically. Before welding, the two pipes need to be precisely aligned and temporarily fixed to ensure the verticality and coaxiality of the splice.

[0003] For small workshops or temporary on-site processing, manual operation or processing with simple fixtures is commonly used. This method has obvious shortcomings: the installation and disassembly of pipe fittings is inconvenient; the alignment and calibration of vertical and horizontal pipes rely entirely on the operator's experience and feel, making it difficult to guarantee assembly accuracy; during spot welding or welding, the operator needs to continuously hold the pipe fitting to maintain the calibration state, which is labor-intensive, and prolonged holding can easily cause shaking, leading to calibration deviation, affecting welding quality, and resulting in low overall processing efficiency.

[0004] Therefore, there is an urgent need for a compact and easy-to-operate clamping device that can quickly fix and calibrate the joint of the tee pipe, automatically center the vertical pipe during installation, and have a locking function to free the operator's hands, thereby improving the welding efficiency and quality of small-scale and temporary processing while ensuring assembly accuracy. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, the present invention provides a clamping device for welding irregular pipe fittings, which effectively solves the above problems.

[0006] The technical solution adopted by this invention is as follows: This invention proposes a clamping device for welding irregularly shaped pipe fittings, including a clamping cylinder, an insertion cylinder, a movable support platform, a centering clamping component, and a support base. An internal support clamping mechanism is provided inside the clamping cylinder, and a pressing block is provided above the clamping cylinder. The pressing block passes through the vertical pipe and abuts against the inner wall of the horizontal pipe, triggering the internal support clamping mechanism to calibrate and clamp the joint of the tee pipe to be assembled. The top of the insertion cylinder is connected to the bottom of the clamping cylinder, and a locking mechanism is provided inside the insertion cylinder. The locking mechanism cooperates with the internal support clamping mechanism to lock and release the clamping state of the internal support clamping mechanism. The support base is connected to the bottom of the insertion cylinder via a straight rod. The movable support platform is movably sleeved on the straight rod and elastically abuts against the bottom of the insertion cylinder. The centering clamping component is provided on the movable support platform and is used for centering and calibrating the vertical pipe.

[0007] Furthermore, the internal support clamping mechanism includes a clamping support rod, an internal support connecting rod, a movable slider, an internal support push rod, and an internal support spring. The internal support push rod is movably disposed inside the clamping cylinder. One end of the internal support push rod is connected to a connecting column, and the other end passes through the top of the clamping cylinder and is connected to the pressing top block. The movable slider is slidably sleeved on the internal support push rod. The internal support connecting rod is symmetrically disposed at both ends of the movable slider. One end of the internal support connecting rod is rotatably connected to one end of the movable slider, and the other end passes through the clamping cylinder and is rotatably connected to the clamping support rod. The clamping support rod is symmetrically disposed on both sides of the clamping cylinder. One end of the clamping support rod is rotatably connected to the top of the insertion cylinder, and the other end is provided with a clamping part. A clamping roller is rotatably connected to the clamping part. The clamping part is used to press and support the joint between the horizontal tube and the vertical tube and to provide calibration. The internal support spring is sleeved on the internal support push rod. One end of the internal support spring elastically abuts against the movable slider, and the other end elastically abuts against the limiting protrusion provided on the internal support push rod.

[0008] Furthermore, the extrusion top block is elastically abutted against a return spring, which is sleeved on the inner support push rod and located between the top of the extrusion top block and the top of the clamping cylinder.

[0009] Furthermore, the locking mechanism includes a locking sleeve, an upper guide module, a lower guide module, a pressing column, a switching column, a locking block, and a locking groove. The locking sleeve is movably disposed within the insertion cylinder, and its top is fixedly connected to the connecting column. The upper and lower guide modules are respectively fixedly disposed at the upper and lower ends of the locking sleeve. The bottom of the upper guide module is provided with an upper guide groove, and the top of the lower guide module is provided with a lower guide groove. The upper and lower guide grooves are staggered. The pressing column is movably disposed within the upper guide module and presses down... A compression spring is connected to the top of the column, which is located inside the upper guide module. The switching column is movably positioned between the upper and lower guide modules. Sliding parts are provided on both sides of the switching column, and the sliding parts are slidably connected to the lower guide groove. The top of the switching column elastically abuts against the lower pressing column. A locking block is located below the locking sleeve. The locking block passes through the bottom of the locking sleeve via a rotating shaft and is fixedly connected to the switching column. The locking groove is fixedly located at the bottom of the insertion cylinder. The locking block can lock and separate from the locking groove by rotating 90 degrees.

[0010] Furthermore, the locking groove is a rectangular slot with a narrow opening at the top, and the locking block is a structure that is narrow at the bottom and wide at the top, with its length greater than the opening length of the locking groove and its width less than the opening length of the locking groove. The locking block is controlled by a locking mechanism to rotate 90 degrees to achieve locking and separation from the locking groove.

[0011] Furthermore, the upper guide chute and the lower guide chute have openings that are opposite each other, and an upper guide slope and a lower guide slope extend from the same side of each other, with the upper guide chute facing the lower guide slope and the lower guide chute facing the upper guide slope.

[0012] Furthermore, the centering clamping assembly includes a pressing plate and a clamping mechanism. The pressing plate is movably sleeved on the insertion cylinder, and mounting slots are symmetrically opened on the movable support platform. The clamping mechanism is symmetrically arranged on both sides of the pressing plate and located on the mounting slots. The pressing plate and the clamping mechanism cooperate to apply pressure to the pressing plate by the downward pressure during the installation of the vertical tube, so as to drive the clamping mechanism to automatically center and clamp the bottom of the vertical tube.

[0013] Furthermore, the clamping mechanism includes a slide rail, a centering clamping plate, a linkage component, and a pressing module. A support base is fixedly connected to the bottom of the slide rail. The support base is bolted to the surface of the extrusion plate on one side of the mounting groove. A sliding seat is provided at the bottom of the centering clamping plate. The sliding seat is slidably connected to the slide rail. First sliding groove protrusions are provided on both sides of the sliding seat. The linkage component is symmetrically arranged in the mounting groove and located on both sides of the support base. The middle part of the linkage component is rotatably connected to the support base. A first sliding groove is opened at one end of the linkage component. The first sliding groove slides in cooperation with the first sliding groove protrusion. A second sliding groove is opened at the other end of the linkage component. The pressing module is symmetrically arranged on both sides of the bottom of the extrusion plate. A second sliding groove protrusion is provided at one end of the pressing module. The second sliding groove protrusion slides in cooperation with the second sliding groove. The top of the pressing module passes through the movable support platform and is connected to the extrusion plate through a pressing guide rod. A pressing spring is sleeved on the pressing guide rod. One end of the pressing spring abuts against the extrusion plate and the other end abuts against the surface of the movable support platform.

[0014] Furthermore, the contact surface of the middle plate is provided with concave symmetrical notches.

[0015] Furthermore, a compression spring is fitted on the straight rod, with one end of the compression spring elastically abutting the bottom of the movable support platform and the other end elastically abutting the support base, and the straight rod is rotatably connected to the support base.

[0016] The beneficial effects achieved by the present invention using the above structure are as follows:

[0017] 1. Through the linkage design of the centering clamping component and the pressure spring, the automatic centering and self-centering of the vertical tube is realized. The downward pressing action of the horizontal tube triggers the extrusion plate to move down, driving the centering clamping plate to move towards the center along the slide rail. It automatically adapts to vertical tubes of different diameters and achieves centering and clamping. At the same time, the movable support platform descends to compress the pressure spring and store force, providing a stable upward pushing force for subsequent docking and clamping, without the need for repeated manual calibration.

[0018] 2. The internal support clamping mechanism and the locking mechanism work together to achieve rapid internal support centering and mechanical self-locking of the horizontal tube opening. The downward pressure during the installation of the horizontal tube drives the extrusion block to move downward, causing the clamping support rod to unfold along the length of the horizontal tube and cooperate with the clamping roller to internally support the horizontal tube opening. At the same time, the locking mechanism achieves 90-degree rotation switching with the cooperation of the upper guide module and the lower guide module, reliably locking the internal support state. Even if the horizontal tube is loosened, it can still maintain stable support.

[0019] 3. The pressure spring and the inner support spring form a relative force to achieve a tight fit between the openings of the vertical tube and the horizontal tube. The elastic force accumulated by the pressure spring when the vertical tube is pressed down pushes the movable support platform and the extrusion plate upward, so that the vertical tube obtains an upward thrust. This force, together with the inward support force of the inner support clamping mechanism on the opening of the horizontal tube, forms a counter-pressure, effectively eliminating the splicing gap and ensuring that the clamping roller and clamping part are always pressed against the splicing point.

[0020] 4. The design of rotating connection between the straight rod and the support base allows for free rotation and adjustment of the pipe fittings during the welding process, making it convenient for construction personnel to perform welding operations from different positions. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of a clamping device for welding irregularly shaped pipe fittings proposed in this invention;

[0022] Figure 2 This is a schematic diagram of the internal support clamping mechanism and locking mechanism of a clamping device for welding irregular pipe fittings proposed in this invention;

[0023] Figure 3 This is a cross-sectional view of the locking mechanism of a clamping device for welding irregularly shaped pipe fittings proposed in this invention;

[0024] Figure 4 This is a partial structural cross-sectional view of a clamping device for welding irregularly shaped pipe fittings proposed in this invention.

[0025] Figure 5 This is an enlarged view of the structure marked A of the clamping device for welding irregular pipe fittings proposed in this invention;

[0026] Figure 6 This is a schematic diagram of the centering clamping assembly of a clamping device for welding irregularly shaped pipe fittings proposed in this invention;

[0027] Figure 7 This is a schematic diagram of the clamping mechanism of a clamping device for welding irregularly shaped pipe fittings proposed in this invention;

[0028] Figure 8 This is a reference diagram showing the usage state of a clamping device for welding irregularly shaped pipe fittings proposed in this invention.

[0029] The components include: 1. Extrusion block; 2. Clamping cylinder; 3. Insertion cylinder; 4. Internal support clamping mechanism; 5. Locking mechanism; 6. Movable support platform; 7. Centering clamping assembly; 8. Support base; 9. Straight rod; 10. Pressure spring; 11. Extrusion plate; 12. Clamping mechanism; 13. Clamping part; 14. Return spring; 15. Internal support spring; 16. Internal support push rod; 17. Moving slider; 18. Internal support connecting rod; 19. Clamping support rod; 20. Clamping roller; 21. Connecting column; 22. Locking sleeve; 23. Upper guide module; 24. Switching column; 25. 1. Lower guide module; 26. Locking block; 27. Lower pressure column; 28. Locking groove; 29. ​​Rotating shaft; 30. Sliding part; 31. Compression spring; 32. Upper guide groove; 33. Lower guide groove; 34. Mounting groove; 35. Lower pressure guide rod; 36. Lower pressure module; 37. Second groove protrusion; 38. Lower pressure spring; 39. Centering clamp; 40. Sliding seat; 41. First groove protrusion; 42. Slide rail; 43. Support seat; 44. Linkage component; 45. First groove; 46. Second groove; 47. Upper guide slope; 48. Lower guide slope.

[0030] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. Detailed Implementation

[0031] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0032] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0033] like Figures 1-8As shown, this invention proposes a clamping device for welding irregularly shaped pipe fittings, including a clamping cylinder 2, an insertion cylinder 3, a movable support platform 6, a centering clamping component 7, and a support base 8. The clamping cylinder 2 is equipped with an internal support clamping mechanism 4, and a pressing block 1 is positioned above it. The pressing block 1, passing through the vertical pipe and abutting against the inner wall of the horizontal pipe, triggers the internal support clamping mechanism 4 to align and clamp the joint of the tee pipe to be assembled. The top of the insertion cylinder 3 is connected to the bottom of the clamping cylinder 2. A locking mechanism 5 is provided inside the insertion cylinder 3, cooperating with the internal support clamping mechanism 4 to lock and release its clamping state. The support base 8 is connected to the bottom of the insertion cylinder 3 via a straight rod 9. The movable support platform 6 is movably sleeved on the straight rod 9 and elastically abuts against the bottom of the insertion cylinder 3. The centering clamping component 7 is positioned on the movable support platform 6 and is used for centering and aligning the vertical pipe.

[0034] In one embodiment of the present invention, such as Figure 2 and Figure 4 As shown, the inner support clamping mechanism 4 includes a clamping support rod 19, an inner support connecting rod 18, a movable slider 17, an inner support push rod 16, and an inner support spring 15. The inner support push rod 16 is movably disposed inside the clamping cylinder 2. One end of the inner support push rod 16 is connected to a connecting post 21, and the other end passes through the top of the clamping cylinder 2 and is connected to the pressing top block 1. The movable slider 17 is slidably sleeved on the inner support push rod 16. The inner support connecting rod 18 is symmetrically disposed at both ends of the movable slider 17. One end of the inner support connecting rod 18 is rotatably connected to one end of the movable slider 17, and the other end passes through the clamping cylinder 2. The holding cylinder 2 is rotatably connected to the clamping support rod 19. The clamping support rod 19 is symmetrically arranged on both sides of the holding cylinder 2. One end of the clamping support rod 19 is rotatably connected to the top of the insertion cylinder 3, and the other end is provided with a clamping part 13. A clamping roller 20 is rotatably connected to the clamping part 13. The clamping part 13 is used to press and support the joint of the horizontal and vertical pipes. The inner support spring 15 is sleeved on the inner support push rod 16. One end of the inner support spring 15 elastically abuts against the moving slider 17, and the other end elastically abuts against the limiting protrusion provided on the inner support push rod 16.

[0035] In one embodiment of the present invention, such as Figure 2 As shown, the extrusion block 1 elastically abuts against the return spring 14, which is sleeved on the inner support push rod 16 and located between the top of the extrusion block 1 and the clamping cylinder 2.

[0036] In one embodiment of the present invention, such as Figures 2-5As shown, the locking mechanism 5 includes a locking sleeve 22, an upper guide module 23, a lower guide module 25, a pressing column 27, a switching column 24, a locking block 26, and a locking groove 28. The locking sleeve 22 is movably disposed within the insertion cylinder 3. The top of the locking sleeve 22 is fixedly connected to the connecting column 21. The upper guide module 23 and the lower guide module 25 are respectively fixedly disposed at the upper and lower ends of the locking sleeve 22. The bottom of the upper guide module 23 is provided with an upper guide groove 32, and the top of the lower guide module 25 is provided with a lower guide groove 33. The upper guide groove 32 and the lower guide groove 33 are staggered. The pressing column 27 is movably disposed within the upper guide module 23. A compression spring 31 is connected to the top of body 27. The compression spring 31 is located inside the upper guide module 23. The switching column 24 is movably located between the upper guide module 23 and the lower guide module 25. Sliding parts 30 are provided on both sides of the switching column 24. The sliding parts 30 are slidably connected to the lower guide groove 33. The top of the switching column 24 elastically abuts against the lower pressing column 27. The locking block 26 is located below the locking sleeve 22. The locking block 26 passes through the bottom of the locking sleeve 22 through the rotating shaft 29 and is fixedly connected to the switching column 24. The locking groove 28 is fixedly located at the bottom of the insertion cylinder 3. The locking block 26 can lock and separate from the locking groove 28 by rotating 90 degrees.

[0037] In one embodiment of the present invention, such as Figure 2 and Figure 4 As shown, the locking groove 28 is a rectangular slot with a narrow opening at the top. The locking block 26 is narrow at the bottom and wide at the top, and its length is greater than the opening length of the locking groove 28. The width of the locking block 26 is less than the opening length of the locking groove 28. The locking block 26 is controlled by the locking mechanism 5 to rotate 90 degrees to achieve locking and separation from the locking groove 28.

[0038] In one embodiment of the present invention, such as Figure 3 and Figure 5 As shown, the upper guide groove 32 and the lower guide groove 33 are arranged with their openings facing each other, and the upper guide slope 47 and the lower guide slope 48 extend from the same side of them respectively. The upper guide groove 32 is directly opposite the lower guide slope 48, and the lower guide groove 33 is directly opposite the upper guide slope 47.

[0039] In one embodiment of the present invention, such as Figure 6 and Figure 7 As shown, the centering clamping assembly 7 includes a pressing plate 11 and a clamping mechanism 12. The pressing plate 11 is movably sleeved on the insertion cylinder 3. The movable support platform 6 has symmetrically opened mounting grooves 34. The clamping mechanism 12 is symmetrically arranged on both sides of the pressing plate 11 and located on the mounting grooves 34. The pressing plate 11 cooperates with the clamping mechanism 12. The pressing plate 11 is pressed by the downward pressure during the installation of the vertical pipe, so as to drive the clamping mechanism 12 to automatically center and clamp the bottom of the vertical pipe.

[0040] In one embodiment of the present invention, such as Figure 7 As shown, the clamping mechanism 12 includes a slide rail 42, a centering clamping plate 39, a linkage 44, and a pressing module 36. A support base 43 is fixedly connected to the bottom of the slide rail 42. The support base 43 is bolted to the surface of the extrusion plate 11 on one side of the mounting groove 34. A sliding seat 40 is provided at the bottom of the centering clamping plate 39. The sliding seat 40 is slidably connected to the slide rail 42. First sliding groove protrusions 41 are provided on both sides of the sliding seat 40. The linkage 44 is symmetrically arranged in the mounting groove 34 and located on both sides of the support base 43. The middle part of the linkage 44 is rotatably connected to the support base 43. A first sliding groove protrusion 41 is opened at one end of the linkage 44. A first slide groove 45 is slidably engaged with a first slide groove protrusion 41. A second slide groove 46 is provided at the other end of the linkage 44. A pressing module 36 is symmetrically arranged on both sides of the bottom of the extrusion plate 11. A second slide groove protrusion 37 is provided at one end of the pressing module 36. The second slide groove protrusion 37 is slidably engaged with the second slide groove 46. The top of the pressing module 36 passes through the movable support platform 6 and is connected to the extrusion plate 11 through the pressing guide rod 35. A pressing spring 38 is sleeved on the pressing guide rod 35. One end of the pressing spring 38 abuts against the extrusion plate 11 and the other end abuts against the surface of the movable support platform 6.

[0041] In one embodiment of the present invention, the contact surface of the centering plate 39 is provided with a concave symmetrical notch.

[0042] In one embodiment of the present invention, such as Figure 1 As shown, a compression spring 10 is sleeved on the straight rod 9. One end of the compression spring 10 elastically abuts against the bottom of the movable support platform 6 and the other end elastically abuts against the support base 8. The straight rod 9 is rotatably connected to the support base 8.

[0043] like Figure 1 As shown, when using the clamping device for welding irregular pipe fittings of the present invention to perform pre-welding assembly work on a tee pipe, the device is first placed stably on the workbench via the support base 8. Relevant personnel check the connection status of each component to ensure that the clamping cylinder 2, insertion cylinder 3, movable bearing platform 6, centering clamping component 7 and inner support clamping mechanism 4 move flexibly. At the same time, it is confirmed that the return spring 14, inner support spring 15, pressure spring 10 and downward pressure spring 38 have good elastic performance and that there is no jamming of each moving part.

[0044] The vertical tube is then installed. Personnel vertically insert the vertical tube to be welded into the outside of the clamping cylinder 2 and the insertion cylinder 3, allowing the vertical tube to fall freely onto the extrusion plate 11 under its own weight. At this point, the vertical tube completely covers the clamping cylinder 2 and the insertion cylinder 3, the extrusion top block 1 is located inside the vertical tube (not yet protruding from the top opening of the vertical tube), the bottom of the vertical tube is in contact with the upper surface of the extrusion plate 11, and the centering clamping assembly 7 is in a ready-to-trigger state.

[0045] It should be noted that if the vertical tube itself is heavy, the compression spring 38 can be slightly compressed to make the extrusion plate 11 drop slightly. However, at this time, the centering clamping plate 39 has not yet fully clamped the vertical tube, and the subsequent horizontal tube pressing action is still required to achieve final centering and clamping.

[0046] Next, the horizontal tube is installed and connected by pressing. Personnel directly take the horizontal tube, align the bottom opening of the horizontal tube with the top opening of the vertical tube, and then press the horizontal tube downwards, gradually aligning the opening of the horizontal tube with the top opening of the vertical tube. During this pressing process, the pressing force is transmitted through the horizontal tube to the vertical tube, causing the bottom of the vertical tube to press down on the pressing plate 11. The pressing plate 11 is movably fitted onto the insertion cylinder 3, and during its downward movement, it first overcomes the elastic force of the pressing spring 38 to move downwards. The pressing plate 11 drives the pressing modules 36 on both sides to move downwards synchronously. The second sliding groove protrusion 37 on the pressing module 36 slides in the second sliding groove 46 of the linkage 44, forcing the linkage 44 to deflect around its central rotating connection point with the support base 43. The other end of the linkage 44 slides through the first sliding groove 45 and engages with the first sliding groove protrusion 41 on the sliding seat 40, thereby driving the sliding seat 40 to move along the slide rail 42 towards the center of the device, causing the centering clamp 39 to move from the left and right sides towards the outer wall of the vertical tube. As the vertical tube continues to be pressed down by the horizontal tube, the concave symmetrical notches of the centering clamps 39 on both sides gradually fit into the outer wall of the vertical tube, achieving automatic centering and clamping of the bottom of the vertical tube from the horizontal direction, which can be adapted to vertical tubes of different diameters.

[0047] It should be noted that during the process of the horizontal tube pressing to drive the vertical tube to be centered and clamped by the centering clamping component 7, when the frictional force between the opening of the horizontal tube and the top opening of the vertical tube is greater than the centering clamping force, the vertical tube will not be centered immediately. Instead, after the release of the horizontal tube and the downward dynamic pressing action, the pressure spring 10 still provides an upward lifting force. At this time, the relative force of the movable support platform 6 and the inner support clamping mechanism 4 makes the horizontal tube and the vertical tube fit tightly together. At the same time, the relative force of the vertical tube on the extrusion plate 11 drives the centering clamping component 7 to center and calibrate the other end of the vertical tube. This can be manually fine-tuned later to meet the processing requirements.

[0048] Meanwhile, the extrusion plate 11 continues to move downward and gradually contacts the upper surface of the movable support platform 6, then pushes the movable support platform 6 downward together, compressing the pressure spring 10 sleeved on the straight rod 9, causing the pressure spring 10 to be compressed and stored. During this relative movement, the clamping cylinder 2 and the insertion cylinder 3 remain stationary, while the vertical tube descends together with the movable support platform 6, causing the clamping cylinder 2 and the insertion cylinder 3 to "extend" upward relative to the vertical tube. The extrusion top block 1, which was originally located inside the vertical tube, passes through the opening at the top of the vertical tube and enters the interior of the horizontal tube through the opening at the bottom of the horizontal tube.

[0049] Specifically, as the horizontal tube continues to be pressed downwards, the inner wall of the horizontal tube contacts the extrusion block 1 that has entered it, and pushes the extrusion block 1 downwards. At this time, the extrusion block 1 overcomes the elastic force of the return spring 14, causing the inner support push rod 16 and the connecting column 21 to move downwards together. The limiting protrusion on the inner support push rod 16 (such as...) Figure 2 As shown, the inner support spring 15 pushes the movable slider 17 to slide downward along the inner support push rod 16. The inner support connecting rod 18, which is symmetrically rotated at both ends of the movable slider 17, swings downward accordingly. The other end of the inner support connecting rod 18 pushes the clamping support rod 19 to open outward around the hinge point between its bottom and the top of the insertion cylinder 3.

[0050] In one embodiment of the present invention, such as Figure 2 and Figure 8 As shown, the clamping support rods 19 are symmetrically arranged, and clamping rollers 20 are rotatably connected to the clamping parts 13 at their ends. The clamping support rods 19 are extended along the length of the horizontal tube (when installing the horizontal tube, it is necessary to ensure that the length of the horizontal tube corresponds to the symmetrical clamping support rods 19, and fine adjustments can be made later). The clamping rollers 20 and the clamping support rods 19 internally support the inner wall of the bottom opening of the horizontal tube, realizing the automatic internal support of the horizontal tube for initial centering and initial support calibration (fine adjustments can be made quickly after installation).

[0051] It should be noted that during the unfolding of the clamping support rod 19, when the clamping support rod 19 has already abutted against the inner wall of the horizontal tube opening on both sides, and the pressing and lowering action has not stopped, the moving slider 17 will be kept in a relatively unchanged position by further compressing the inner support spring 15 to achieve dynamic compensation. When the pressing is released, the clamping support rod 19 will move the clamping part 13 and the clamping roller 20 to the horizontal tube opening and tightly clamp them against the vertical tube opening through the rebound force of the pressure spring 10.

[0052] like Figures 3-5 As shown, at the same moment that the clamping strut 19 opens, the locking mechanism 5 automatically locks the state. Before locking, as... Figure 5As shown, under the push of the compression spring 31 and the pressing column 27, the sliding part 30 slides from the lower guide slope 48 and is locked in the lower guide groove 33. When the pressing drive locking mechanism 5 is locked in the unfolded state, the downward movement of the connecting column 21 pushes the locking sleeve 22 and the upper guide module 23 and lower guide module 25 fixed on its upper end to move downward together, thereby driving the switching column 24 located between the upper guide module 23 and the lower guide module 25 to move downward. At this time, the switching column 24 drives the locking block 26 to move downward through the rotating shaft 29 until it is inserted into the locking groove 28 set at the bottom of the insertion cylinder 3. The length direction of the locking block 26 is consistent with the narrow opening direction of the locking groove 28, so that it can be smoothly locked into the locking groove 28 fixed at the bottom of the insertion cylinder 3. When the locking block 26 abuts against the bottom surface of the locking groove 28, with the continuous downward pressure, the locking block 26 moves the switching column 24 from the lower guide module 28 through the rotating shaft 29. 5. When the sliding part 30 is lifted, it separates from the lower guide groove 33 and moves upward until it contacts the upper guide slope 47. Under the sliding guidance of the upper guide slope 47, the sliding part 30 enters the upper guide groove 32. During this process, the switching column 24 rotates initially with the sliding part 30 (the initial rotation is less than 90 degrees), causing the locking block 26 to rotate in the locking groove 28. The length of the locking block 26 is greater than the opening width of the locking groove 28. At this time, the pressing force is released, and under the rebound force composed of multiple springs, the movable support platform 6 lifts the vertical tube. At the same time, the locking sleeve 22 resets. Under the downward pressure of the compression spring 31 and the lower pressing column 27, the sliding part 30 that has entered the upper guide groove 32 descends vertically and slides into the lower guide groove 33 after passing through the lower guide slope 48, achieving a 90-degree rotation. This completes one cycle of the posture locking operation of the inner support clamping mechanism 4 and the locking mechanism 5. At this time, the unfolded state of the inner support clamping mechanism 4 is locked. Even if the relevant personnel release the downward pressure on the horizontal tube, the clamping rod 19 will not retract and will continue to provide the inner support clamping force.

[0053] At this point, the horizontal and vertical tubes have completed their initial docking and clamping. After the relevant personnel confirm that the locking is effective, as the downward pressure on the horizontal tube is released, the previously compressed pressure spring 10 releases its elasticity, pushing the movable support platform 6 upward. The movable support platform 6 then pushes the vertical tube upward through the compression plate 11, giving the vertical tube an upward thrust. This upward thrust, together with the inward clamping force of the inner support clamping mechanism 4 on the horizontal tube opening, forms a relative force, tightly fitting the vertical tube opening and the horizontal tube opening together, eliminating the splicing gap. In this state, the relevant personnel can manually make slight adjustments to the angle or position of the horizontal tube to further precisely align the openings, completing the final calibration (e.g., ...). Figure 8 (As shown). At this point, the entire assembly process does not require manual continuous holding of the pipe fittings, completely solving the problem in traditional processing where operators need to maintain the pipe fitting posture for a long time, and the easy shaking can lead to calibration deviation.

[0054] Then, the relevant personnel can use welding equipment to weld the joint between the horizontal and vertical pipes. During this process, the horizontal and vertical pipes after the initial welding can be rotated through the rotating connection between the straight rod 9 and the support base 8, which will drive the insertion cylinder 3 and other related structures to rotate until the final welding is completed.

[0055] After all welding work is completed, unlocking and removal are performed: Personnel press down on the horizontal tube again to lower the extrusion block 1 further, causing the locking sleeve 22 to descend a short distance. At this time, the sliding part 30 of the switching column 24 disengages from the constraint area of ​​the lower guide slope 48 and rotates 90 degrees again along the slide track under the elastic force of the extrusion spring 31. The locking block 26 rotates 90 degrees accordingly, disengaging upward from the locking groove 28, thus releasing the lock. Subsequently, the inner support spring 15 and the return spring 14 release their elastic force, pushing the moving slider 17 and the inner support push rod 16 upward. The inner support connecting rod 18 pulls the clamping support rod 19 inward, releasing the inner support of the horizontal tube opening. Simultaneously, the pressure spring 10 pushes the movable bearing platform 6 upward, the downward pressure spring 38 pushes the extrusion plate 11 to reset, and the centering clamp 39 automatically opens. At this time, personnel can remove the welded tee fitting from the device, completing the entire assembly welding operation. If continuous operation is required, the above steps can be repeated.

[0056] In summary, the clamping device for welding irregularly shaped pipe fittings of the present invention achieves automatic centering and adaptive centering of the vertical pipe through the linkage design of the centering clamping component and the pressure spring. The downward pressure of the horizontal pipe triggers the extrusion plate to move downward, driving the centering clamping plate to move towards the center along the slide rail, automatically adapting to vertical pipes of different diameters and achieving centered clamping. Simultaneously, the movable support platform descends, compressing the pressure spring to store force, providing a stable upward pushing force for subsequent butt joint clamping, eliminating the need for repeated manual calibration. The internal support clamping mechanism and the locking mechanism work together to achieve rapid internal support centering and mechanical self-locking of the horizontal pipe opening. The downward pressure during horizontal pipe installation drives the extrusion block downward, causing the clamping support rod to unfold along the length of the horizontal pipe and cooperate with the clamping rollers to internally support the horizontal pipe opening. At the same time, the locking mechanism, with the cooperation of the upper and lower guide modules, achieves a 90-degree rotation switch, reliably locking the internal support state, maintaining stable support even when the horizontal pipe is released. The pressure spring and the inner support spring create a relative force, achieving a tight fit between the vertical and horizontal pipe openings. The accumulated elasticity of the pressure spring when the vertical pipe is pressed down pushes the movable support platform and the extrusion plate upwards, giving the vertical pipe an upward thrust. This thrust, combined with the inward clamping force of the inner support clamping mechanism on the horizontal pipe opening, creates opposing pressure, effectively eliminating splicing gaps and ensuring that the clamping rollers and clamping parts are always firmly against the splice. The rotating connection design between the straight rod and the support base allows for free rotation and adjustment of the pipe fittings during welding. The rotational cooperation between the bottom of the straight rod and the support base allows the initially assembled tee pipe to be rotated at any angle without disassembly, facilitating welding operations from different directions. Furthermore, the overall operation of the device is simple, requiring only four steps: "place the vertical pipe → connect the horizontal pipe and press down → weld → press down again to unlock and remove," significantly improving the efficiency and convenience of small-batch, temporary welding operations.

[0057] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0058] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

[0059] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A clamping device for welding irregularly shaped pipe fittings, characterized in that: It includes a clamping cylinder (2), an insertion cylinder (3), a movable support platform (6), a centering clamping assembly (7), and a support base (8); The clamping cylinder (2) is provided with an internal support clamping mechanism (4), and a pressing top block (1) is provided above the clamping cylinder (2). The internal support clamping mechanism (4) is activated by the pressing top block (1) passing through the vertical pipe and abutting against the inner wall of the horizontal pipe to calibrate and clamp the splice of the three-way pipe to be assembled. The top of the insertion cylinder (3) is connected to the bottom of the clamping cylinder (2). A locking mechanism (5) is provided inside the insertion cylinder (3). The locking mechanism (5) cooperates with the inner support clamping mechanism (4) to lock and release the clamping state of the inner support clamping mechanism (4). The support base (8) is connected to the bottom of the insertion tube (3) via a straight rod (9); The movable support platform (6) is movably sleeved on the straight rod (9) and elastically abuts against the bottom of the insertion cylinder (3); The centering clamping component (7) is disposed on the movable support platform (6) and is used to center and calibrate the vertical pipe.

2. The clamping device for welding irregularly shaped pipe fittings according to claim 1, characterized in that: The inner support clamping mechanism (4) includes a clamping support rod (19), an inner support connecting rod (18), a movable slider (17), an inner support push rod (16), and an inner support spring (15). The inner support push rod (16) is movably disposed inside the clamping cylinder (2). One end of the inner support push rod (16) is connected to a connecting column (21), and the other end of the push rod (16) passes through the top of the clamping cylinder (2) and is connected to the extrusion block (1). The movable slider (17) is slidably sleeved on the inner support push rod (16); The inner support rod (18) is symmetrically arranged at both ends of the movable slider (17). One end of the inner support rod (18) is rotatably connected to one end of the movable slider (17), and its other end passes through the clamping cylinder (2) and is rotatably connected to the clamping support rod (19). The clamping support rod (19) is symmetrically arranged on both sides of the clamping cylinder (2). One end of the clamping support rod (19) is rotatably connected to the top of the insertion cylinder (3), and the other end is provided with a clamping part (13). A clamping roller (20) is rotatably connected to the clamping part (13). The clamping part (13) is used to press and support the joint between the horizontal and vertical pipes for calibration. The inner support spring (15) is sleeved on the inner support push rod (16). One end of the inner support spring (15) elastically abuts against the movable slider (17), and the other end elastically abuts against the limiting protrusion provided on the inner support push rod (16).

3. The clamping device for welding irregularly shaped pipe fittings according to claim 2, characterized in that: The extrusion block (1) is elastically abutted against a return spring (14), which is sleeved on the inner support push rod (16) and located between the top of the extrusion block (1) and the clamping cylinder (2).

4. The clamping device for welding irregularly shaped pipe fittings according to claim 2, characterized in that: The locking mechanism (5) includes a locking sleeve (22), an upper guide module (23), a lower guide module (25), a lower pressure column (27), a switching column (24), a locking block (26), and a locking groove (28). The locking sleeve (22) is movably disposed inside the insertion tube (3), and the top of the locking sleeve (22) is fixedly connected to the connecting post (21); The upper guide module (23) and the lower guide module (25) are respectively fixedly installed at the upper and lower ends of the locking sleeve (22). The bottom of the upper guide module (23) is provided with an upper guide groove (32), and the top of the lower guide module (25) is provided with a lower guide groove (33). The upper guide groove (32) and the lower guide groove (33) are staggered. The pressing column (27) is movably disposed within the upper guide module (23), and a compression spring (31) is connected to the top of the pressing column (27), which is disposed within the upper guide module (23). The switching column (24) is movably disposed between the upper guide module (23) and the lower guide module (25). Sliding parts (30) are provided on both sides of the switching column (24). The sliding parts (30) are slidably connected to the lower guide groove (33). The top of the switching column (24) is elastically abutted against the lower pressing column (27). The locking block (26) is located below the locking sleeve (22), and the locking block (26) passes through the bottom of the locking sleeve (22) via a rotating shaft (29) and is fixedly connected to the switching column (24); The locking groove (28) is fixedly installed at the bottom of the insertion tube (3), and the locking block (26) can lock and separate from the locking groove (28) by rotating 90 degrees.

5. The clamping device for welding irregularly shaped pipe fittings according to claim 4, characterized in that: The locking groove (28) is a rectangular slot with a narrow opening at the top. The locking block (26) is narrow at the bottom and wide at the top, and its length is greater than the opening length of the locking groove (28). The width of the locking block (26) is less than the opening length of the locking groove (28). The locking block (26) is controlled by the locking mechanism (5) to rotate 90 degrees to achieve locking and separation from the locking groove (28).

6. The clamping device for welding irregularly shaped pipe fittings according to claim 4, characterized in that: The upper guide groove (32) and the lower guide groove (33) are arranged with their openings facing each other and with an upper guide slope (47) and a lower guide slope (48) extending from the same side respectively. The upper guide groove (32) faces the lower guide slope (48) and the lower guide groove (33) faces the upper guide slope (47).

7. The clamping device for welding irregularly shaped pipe fittings according to claim 1, characterized in that: The centering clamping assembly (7) includes a pressing plate (11) and a clamping mechanism (12). The pressing plate (11) is movably sleeved on the insertion cylinder (3). The movable support platform (6) is symmetrically provided with mounting slots (34). The clamping mechanism (12) is symmetrically arranged on both sides of the pressing plate (11) and located on the mounting slots (34). The pressing plate (11) cooperates with the clamping mechanism (12). The pressing plate (11) is pressed by the downward pressure during the installation of the vertical pipe, so as to drive the clamping mechanism (12) to automatically center and clamp the bottom of the vertical pipe.

8. The clamping device for welding irregularly shaped pipe fittings according to claim 7, characterized in that: The clamping mechanism (12) includes a slide rail (42), a centering clamping plate (39), a linkage component (44), and a pressing module (36). The bottom of the slide rail (42) is fixedly connected to a support base (43), and the support base (43) is bolted to the surface of the extrusion plate (11) on one side of the mounting groove (34). The centering clamp (39) is provided with a sliding seat (40) at the bottom. The sliding seat (40) is slidably connected to the slide rail (42). The sliding seat (40) is provided with first sliding groove protrusions (41) on both sides. The linkage (44) is symmetrically arranged in the mounting groove (34) and located on both sides of the support base (43). The middle part of the linkage (44) is rotatably connected to the support base (43). One end of the linkage (44) is provided with a first sliding groove (45). The first sliding groove (45) is slidably engaged with the first sliding groove protrusion (41). The other end of the linkage (44) is provided with a second sliding groove (46). The pressing module (36) is symmetrically arranged on both sides of the bottom of the extrusion plate (11). One end of the pressing module (36) is provided with a second sliding groove protrusion (37). The second sliding groove protrusion (37) and the second sliding groove (46) are slidably engaged. The top of the pressing module (36) passes through the movable support platform (6) through the pressing guide rod (35) and is connected to the extrusion plate (11). A pressing spring (38) is sleeved on the pressing guide rod (35). One end of the pressing spring (38) abuts against the extrusion plate (11) and the other end abuts against the surface of the movable support platform (6).

9. A clamping device for welding irregularly shaped pipe fittings according to claim 8, characterized in that: The contact surface of the centering plate (39) has a concave symmetrical notch.

10. A clamping device for welding irregularly shaped pipe fittings according to claim 1, characterized in that: A compression spring (10) is fitted on the straight rod (9). One end of the compression spring (10) elastically abuts against the bottom of the movable support platform (6) and the other end elastically abuts against the support base (8). The straight rod (9) is rotatably connected to the support base (8).

Images