Vertical flaring device for socket welding type pipe fitting
By designing a vertical flaring device with automatic mold withdrawal, the problem of difficult to withdraw the mold after flaring of the socket welded pipe fittings is solved, automatic mold withdrawal and multi-diameter adaptability are achieved, and processing efficiency and maintenance convenience are improved.
Patent Information
- Application Number
- CN202421124755.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-22
- Publication Date
- 2025-01-10
- Estimated Expiration
- 2034-05-22
AI Technical Summary
The existing socket welded pipe fittings flaring device is difficult to automatically withdraw the mold after flaring, resulting in low processing efficiency and manual intervention to assist in the mold retraction, affecting product production.
A vertical flaring device is designed, using a hydraulic press and a telescopic mechanism to combine it with a disassembled connection structure between the ejection ring and the guide shaft to realize automatic mold retraction of the pipe fittings, and the forming punch and ejection ring can be detached for easy replacement and maintain.
It realizes automatic mold retraction after the pipe fittings is flared, improves processing efficiency, and facilitates replacement and maintenance through a split-body connection structure, adapting to the requirements of different pipe fitting diameters.
Smart Images
Figure CN222326482U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of expanding of metal pipe fittings, in particular to a vertical expanding device for socket welding type pipe fittings. Background Art
[0002] Socket welding pipe fittings are a special pipe connection method, which is characterized by inserting the stainless steel pipe into the socket of the pipe fitting and reaching the socket positioning step position, and then performing a ring of argon protection fusion welding at the contact point between the end of the pipe fitting and the outer wall of the pipe. This welding method does not require welding wire, but uses the edge of the end of the pipe fitting socket to replace it, thus forming a "jointless connection" pipe connection method, which has a wide range of application prospects in high pressure, high temperature, special medium transportation and other occasions. When processing socket welding pipe fittings, it is necessary to use a flaring device to flare the socket of the pipe fitting so that the connecting pipe fitting can be inserted to achieve socket connection. At present, the mainstream flaring device mostly uses a hydraulic press, which includes a fixed top workbench and a lifting bottom workbench, and a forming punch is set on the bottom workbench. After placing the pipe fitting on the forming punch, the bottom workbench is raised by oil pressure to dock with the top workbench and squeeze the pipe fitting, and the flaring of the pipe fitting can be completed. Although the existing technology has a simple structure and low cost, it has defects in use. For example, it is not easy to demold the pipe after expanding, and it may even get stuck. Manual intervention is required to assist in demolding by knocking on the pipe, which greatly affects processing efficiency and causes product difficulty. Summary of the invention
[0003] In view of the above-mentioned deficiencies in the prior art, the utility model provides a vertical expansion device for socket-welded pipe fittings, which can stably withdraw from the mold, to solve the above-mentioned problems.
[0004] The utility model discloses a vertical expanding device for socket welding type pipe fittings, comprising a hydraulic press, wherein the hydraulic press is provided with a top workbench and a bottom workbench, a telescopic mechanism is provided below the bottom workbench, and a through hole aligned with the telescopic mechanism is provided, a mounting plate is provided on the top surface of the bottom workbench, a bracket plate is provided on the top surface of the mounting plate, a forming punch is provided on the top surface of the bracket plate, the forming punch sleeve is provided with an ejection ring, a plurality of guide shafts sliding up and down are vertically penetrated on the bracket plate, the top end of the guide shaft is fixedly connected to the bottom surface of the ejection ring, the bottom end of the guide shaft is provided with a connecting plate, and the telescopic shaft of the telescopic mechanism is fixedly connected to the bottom surface of the connecting plate after passing through the through hole.
[0005] Furthermore, the forming punch is detachably connected to the bracket plate, and the ejection ring is detachably connected to the guide shaft.
[0006] Furthermore, a punch support seat is provided between the forming punch and the bracket plate, and an ejector ring support seat is provided between the ejector ring and the bracket plate.
[0007] Furthermore, the forming punch, the punch support seat and the bracket plate are all provided with air holes.
[0008] Furthermore, the bracket plate is provided with shaft sleeves corresponding one to one with the guide shafts.
[0009] Preferably, the telescopic mechanism is an ejection cylinder.
[0010] Compared with the prior art, the beneficial effects of the utility model are:
[0011] 1. In addition to meeting the expansion requirements of pipe fittings, the expansion device also has a structure that automatically withdraws the mold after the pipe fittings are expanded, thereby improving processing efficiency.
[0012] 2. The overall structure adopts a split-connected assembly structure, and each component is connected by bolts. It can not only change the size of the forming punch and the ejector ring according to the diameter of the pipe fittings, so that it can match different pipe fittings diameters and meet processing requirements, but also facilitate the replacement of wearing parts and overall inspection and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 This is a structural axial view of the utility model;
[0014] Figure 2 It is a schematic diagram of the structure of the utility model after cutting.
[0015] In the figure: 1. top workbench; 2. bottom workbench; 3. telescopic mechanism; 4. through hole; 5. mounting plate; 6. bracket plate; 7. forming punch; 8. ejector ring; 9. guide shaft; 10. connecting plate; 11. punch support seat; 12. ejector ring support seat; 13. air hole; 14. shaft sleeve; 15. socket welding type pipe fitting. DETAILED DESCRIPTION
[0016] In order to better understand the present invention, Figure 1 to Figure 2 The implementation modes of the present utility model will be explained in detail.
[0017] It should be noted that the directions "front, back, left, right, up, down" mentioned in the text are based on Figure 1 The directions of “front, back, left, right, up, and down” are used as the basis.
[0018] See also Figure 1 and Figure 2The utility model discloses a vertical expansion device for socket welding pipe fittings, comprising a hydraulic press in the prior art, wherein the hydraulic press is provided with a fixed top workbench 1 and a bottom workbench 2 driven to rise and fall by hydraulic pressure. On this technical basis, a telescopic mechanism 3 is arranged below the bottom workbench 2, and a through hole 4 aligned with the telescopic mechanism 3 is opened. A mounting plate 5 is arranged on the top surface of the bottom workbench 2, and a bracket plate 6 is arranged on the top surface of the mounting plate 5. A forming punch 7 is arranged on the top surface of the bracket plate 6. The outer surface of the forming punch 7 is set to a cylindrical step shape, and its shape and size are consistent with the inner diameter size of the socket welding type pipe fitting 15 (after expansion); the forming punch 7 is sleeved with an ejector ring 8, and the inner diameter of the ejector ring 8 is slightly larger than (+1mm) the outer diameter of the forming punch 7 and slightly smaller than (-1mm) the outer diameter of the socket welding type pipe fitting 15 (after expansion); a plurality of guide shafts 9 that slide up and down are vertically penetrated on the bracket plate 6, and the top end of the guide shaft 9 is fixedly connected to the bottom surface of the ejector ring 8, and the bottom end of the guide shaft 9 is provided with a connecting plate 10, and the telescopic shaft of the telescopic mechanism 3 is fixedly connected to the bottom surface of the connecting plate 10 after passing through the through hole 4.
[0019] The preferred technical solution in this embodiment is to detachably connect the forming punch 7 to the bracket plate 6 and the ejector ring 8 to the guide shaft 9 in order to meet the expansion requirements of socket-welded pipe fittings 15 of different sizes, and the detachable connection method is bolt threaded connection.
[0020] The preferred technical solution in this embodiment is to facilitate the replacement of wearing parts and overall maintenance. Figure 1 and Figure 2 As shown in the figure, all parts of the expansion device are connected in a detachable manner by bolts or threads.
[0021] The preferred technical solution in this embodiment takes into account that the forming punch 7 and the ejector ring 8 have the most contact with the pipe fitting 15 and are prone to wear. They are consumable parts. If the sheet material is directly used for reprocessing and replacement after wear, the material cost is high. For this reason, a punch support seat 11 is provided between the forming punch 7 and the bracket plate 6, and an ejector ring support seat 12 is provided between the ejector ring 8 and the bracket plate 6. The forming punch 7 and the ejector ring 8 are each divided into two parts, so as to reduce the manufacturing cost.
[0022] The preferred technical solution in this embodiment takes into account that the gas inside the pipe 15 cannot be discharged when the straight pipe is expanded, and the forming punch 7, the punch support seat 11 and the bracket plate 6 are all provided with air holes 13, and the air holes 13 also have a weight reduction effect.
[0023] The preferred technical solution in this embodiment is that in order to improve the smoothness of the guide shaft 9 sliding on the bracket plate 6, a shaft sleeve 14 corresponding to the guide shaft 9 is provided on the bracket plate 6.
[0024] In the preferred technical solution of this embodiment, the telescopic mechanism 3 is a ejection cylinder.
[0025] The use and principle of the utility model are as follows: Under normal conditions, the telescopic shaft of the telescopic mechanism 3 is in a stationary state (lower limit position), and the connecting bottom plate, guide shaft 9, ejection ring support seat 12 and ejection ring 8 connected step by step to the top of the telescopic shaft are also in a stationary state; when the pipe fitting 15 is expanded, the socket end of the pipe fitting 15 that needs to be expanded is sleeved on the forming punch 7, and then the bottom workbench 2 is raised by oil pressure, so that the top port of the pipe fitting 15 is docked with the top workbench to complete the expansion of the pipe fitting 15. When the pipe fitting 15 is expanded and formed, the pipe fitting 15 has been pressed into the forming punch 7, and the bottom workbench 2 is reset and starts to be synchronously demolded. During this period, the telescopic shaft of the telescopic mechanism 3 moves linearly upward, and the connecting bottom plate, guide shaft 9, ejection ring support seat 12 and ejection ring 8 connected step by step to the top of the telescopic shaft also move linearly upward, and the ejection ring 8 applies upward pressure to the pipe fitting 15, so that the formed pipe fitting 15 is demolded from the forming punch 7 to facilitate the removal of the pipe fitting 15. After the pipe fitting 15 is taken out, the piston shaft immediately moves downward to the limit position, and the expansion is continued after the new pipe fitting 15 is installed.
[0026] In the description of the present utility model, it should be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In the description of the present utility model, unless otherwise specified and limited, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a mechanical connection or an electrical connection, or it can be the internal communication of two elements, it can be a direct connection, or it can be an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.
[0027] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A vertical expansion device for socket welding pipe fittings, comprising a hydraulic press, wherein the hydraulic press is provided with a top workbench (1) and a bottom workbench (2), characterized in that: A telescopic mechanism (3) is arranged below the bottom workbench (2), and a through hole (4) aligned with the telescopic mechanism (3) is provided. A mounting plate (5) is arranged on the top surface of the bottom workbench (2). A bracket plate (6) is arranged on the top surface of the mounting plate (5). A forming punch (7) is arranged on the top surface of the bracket plate (6). The forming punch (7) is sleeved with an ejection ring (8). A plurality of guide shafts (9) that slide up and down are vertically penetrated through the bracket plate (6). The top end of the guide shaft (9) is fixedly connected to the bottom surface of the ejection ring (8). A connecting plate (10) is arranged at the bottom end of the guide shaft (9). The telescopic shaft of the telescopic mechanism (3) passes through the through hole (4) and is fixedly connected to the bottom surface of the connecting plate (10).
2. A vertical expansion device for socket welding pipe fittings as claimed in claim 1, characterized in that: The forming punch (7) is detachably connected to the support plate (6), and the ejection ring (8) is detachably connected to the guide shaft (9).
3. A vertical expansion device for socket welding pipe fittings as claimed in claim 2, characterized in that: A punch support seat (11) is provided between the forming punch (7) and the support plate (6), and an ejector ring support seat (12) is provided between the ejector ring (8) and the support plate (6).
4. A vertical expansion device for socket welding pipe fittings as claimed in claim 3, characterized in that: The forming punch (7), the punch support seat (11) and the support plate (6) are all provided with air holes (13).
5. A vertical expansion device for socket welding pipe fittings as claimed in claim 1, characterized in that: The support plate (6) is provided with shaft sleeves (14) corresponding one to one with the guide shafts (9).
6. A vertical expansion device for socket welding pipe fittings as claimed in claim 1, characterized in that: The telescopic mechanism (3) is a push-out oil cylinder.