A pipe shaping die

Abstract

The application discloses a pipe shaping die, and relates to the technical field of pipe shaping, which comprises a limiting device, a shaping device and a mounting seat for mounting the limiting device and the shaping device. The limiting device comprises two limiting pieces. One end of the two limiting pieces is hinged, and the other end is detachably connected. The two limiting pieces are connected at the ends away from the hinge points, and a limiting space for assisting shaping of an extension section of a main pipe is formed between the two limiting pieces. One limiting piece is fixedly connected with the mounting seat. The shaping device is arranged on one side of the mounting seat, and is located between the two limiting pieces. When the extension section enters the limiting space, the shaping device is located inside the extension section, and is used for extruding the inner side of the extension section outward. The application can effectively reduce operation difficulty, effectively improve shaping efficiency and effect, and facilitate a construction worker to complete welding processing.

Description

Technical Field

[0001] This application relates to the technical field of pipe shaping, and in particular to a pipe shaping mold. Background Technology

[0002] Pipes, or tubular materials, are widely used in construction engineering, power plants, chemical plants, and other applications. For example, the casing of an ultra-high voltage circuit breaker is formed by welding together multiple pipes, as shown in the attached image. Figure 1 As shown, the existing UHV circuit breaker casing includes a main pipe 1 and two branch pipes 2. The main pipe 1 has annular extension sections 3 extending outward on both sides, and the branch pipe 2 also has annular extension sections 3 extending outward on one side. The extension sections 3 of the main pipe 1 and the extension sections 3 of the branch pipe 2 are matched. Usually, the construction personnel align the extension sections 3 of the branch pipe 2 with the extension sections 3 of the main pipe 1 and then weld them to fix them, thus obtaining the UHV circuit breaker casing.

[0003] In the existing manufacturing process of UHV circuit breaker casings, flanges need to be fixed to the ends of the main pipe and branch pipe before welding. Before flange installation, the entire branch pipe (including its extension section) needs to be shaped to meet the arc requirements of the UHV circuit breaker casing. However, during the welding process between the branch pipe and the extension section of the main pipe, the extension section of the main pipe is not shaped (typically, its radial and arc dimensions are smaller than those of the branch pipe extension section). This necessitates that construction workers first perform spot welding, and then, based on the actual situation after spot welding, hammer the extension section of the main pipe (using tools such as a hammer) to ensure that the arc dimensions of the main pipe extension section match those of the branch pipe extension section, facilitating subsequent welding and improving weld strength.

[0004] Because existing methods for shaping the extension of the main tube have drawbacks such as low efficiency, difficulty in guaranteeing results, and high operational difficulty, there is an urgent need for a shaping mold that is easy to operate, efficient, and of high quality for shaping the extension of the main tube. Summary of the Invention

[0005] This application provides a pipe forming mold that can effectively reduce the difficulty of operation, while effectively improving the forming efficiency and effect, and making it convenient for construction personnel to complete the welding process.

[0006] This application provides a forming mold for pipes, employing the following technical solution: A pipe forming mold includes a limiting device, a forming device, and a mounting base for mounting the limiting device and the forming device. The limiting device includes two limiting members; one end of the two limiting members is hinged and the other end is detachably connected, and after the ends of the two limiting members away from the hinge point are connected, a limiting space is formed between the two limiting members to assist in the shaping of the extension section of the main tube. One of the limiting members is fixedly connected to the mounting base, and the shaping device is disposed on one side of the mounting base and is located between the two limiting members; When the extension enters the limiting space, the shaping device is located inside the extension and is used to squeeze the inside of the extension outward.

[0007] By adopting the above technical solution, construction personnel can easily shape the extension section of the main pipe before welding the branch pipe to the main pipe. This effectively reduces the difficulty of operation and improves the efficiency and effect of shaping, so that the radial dimensions and curvature of the extension section of the main pipe match the radial dimensions and curvature of the extension section of the branch pipe, thereby facilitating the subsequent welding process.

[0008] Optionally, it may also include a workbench for assisting the supervisor in positioning; The top of the workbench has a shelf, and the shelf has a vertical opening for the extension section to pass through; the workbench has a mounting rod that passes through the vertical opening, and the axis of the mounting rod coincides with the axis of the opening. After the main tube is placed on the storage seat, the extension section extending vertically and located at the bottom passes through the clearance opening, and the mounting rod passes through the extension section located at the top; after the extension section located at the top enters the limiting space, the mounting seat is connected to the mounting rod.

[0009] By adopting the above technical solution, the main pipe can be placed in a suitable position, which makes it easier for construction workers to shape its extension section, and thus facilitates subsequent welding processing.

[0010] Optionally, the shaping device includes an airbag and an air nozzle; The airbag is fixedly connected to the mounting base, and after it is inflated, it is used to contact and compress the inner wall of the extension section; one end of the air nozzle is connected to the airbag and the other end protrudes from the mounting base, and it is used to control the gas entering and leaving the airbag.

[0011] By adopting the above technical solution, the airbag inflates and applies a compressive force to the inner wall of the extension section, so that the extension section can be deformed until its outer side fits with the limiting member, thereby realizing the shaping of the extension section. This can effectively reduce the probability of damage to the extension section during the shaping process, and at the same time effectively improve the shaping efficiency and shaping effect.

[0012] Optionally, the shaping device further includes a limiting plate for limiting the airbag; The limiting plate is disposed on the mounting rod, and its cross-sectional dimension is smaller than the internal dimension of the extension section. When the mounting base is connected to the mounting rod, the limiting plate is located below the airbag, limiting the degree of vertical expansion of the airbag after inflation.

[0013] By adopting the above technical solution, the limiting plate can play a guiding role in the placement and positioning of the main tube, and at the same time, it can guide the direction of airbag expansion in the process of shaping the extension section, thereby further improving the efficiency and effect of squeezing and shaping the extension section after the airbag is expanded.

[0014] Optionally, the shaping device may also include an elastic air cushion; The air cushion is disposed on the periphery of the limiting plate, and the limiting plate contacts and abuts against the inner wall of the main pipe through the air cushion.

[0015] By adopting the above technical solution, the air cushion can further improve the positioning effect of the limiting plate in guiding the placement of the main pipe, and at the same time, it can further improve the effect of the limiting plate in guiding the direction of airbag inflation.

[0016] Optionally, the air cushion is adjustable in terms of expansion and contraction. After expansion, it contacts and abuts against the inner wall of the main pipe near the extension section, exerting a vertically upward force on the main pipe and driving the main pipe to maintain the vertically extended position of the extension section. After the mounting base is connected to the mounting rod, it applies a downward force to the main pipe, and the main pipe is positioned between the mounting base and the air cushion.

[0017] By adopting the above technical solution, the accuracy and stability of the supervisor's placement and positioning on the workbench can be improved, thereby effectively ensuring the efficiency and effectiveness of subsequent shaping and welding processes.

[0018] Optionally, it also includes a fixed base, wherein the mounting base is rotatably connected to the fixed base, the axis of rotation of the mounting base coincides with its own axis, and the fixed base is detachably connected to the mounting rod; The shaping device includes multiple extrusion components; the extrusion components are disposed on the mounting base and located between the two limiting members, and the multiple extrusion components are arranged in a circumferential array with the axis of the mounting base as the axis and are all close to the limiting members that are fixedly connected to the mounting base; The extrusion assembly includes an extruder and a drive member; the extruder is radially movably connected to the mounting base, the drive member drives the extruder to move, and multiple extruders move synchronously and in the same direction relative to the axis of the mounting base.

[0019] By adopting the above technical solution, multiple extrusion components can be used to locally and centrally extrude and shape the extension section. Local large-scale shaping can ensure the effect of initial extrusion and shaping. Then, by controlling the rotating mounting base, the extension section can be fully shaped. Comprehensive small-scale shaping can ensure the effect of final extrusion and shaping.

[0020] Optionally, after the two limiting members are enclosed to form a limiting space, a space is formed between the end of the limiting member away from the hinge position and the extension segment for the extension segment to deform.

[0021] By adopting the above technical solution, the probability of damage to the extension segment due to local extrusion and shaping can be effectively reduced, and the probability of damage to the extension segment during the process of full extrusion and shaping can also be reduced.

[0022] Optionally, the extruder is rotatably provided with a roller for direct contact with the inner wall of the extension section, and the rotation axis of the roller is parallel to the rotation axis of the mounting base.

[0023] By adopting the above technical solution, the probability of damage to the inner wall of the extension section during the full extrusion forming process can be reduced. At the same time, the probability of positional changes caused by friction between the extruder and the extension section during the full extrusion forming process of the main pipe can be reduced, thereby effectively ensuring the efficiency and effect of extrusion forming.

[0024] Optionally, the end of the limiting member away from the hinge position has an extension; after the two limiting members are enclosed to form a limiting space, the two extensions are overlapped to form a structure that facilitates the construction personnel to control the rotation of the mounting base.

[0025] By adopting the above technical solution, construction personnel can easily control the rotation of the mounting base directly or with the help of tools using the extension, thereby reducing the operational difficulty for construction personnel and further improving the efficiency of extrusion shaping.

[0026] In summary, this application includes at least one of the following beneficial effects: 1. It allows construction workers to shape the extension section of the main pipe before welding the branch pipe to the main pipe, effectively reducing the difficulty of operation while improving the efficiency and effect of shaping, thus making it easier for construction workers to complete the welding process later. 2. It enables the main pipe to be accurately placed and positioned, making it convenient for construction personnel to perform shaping operations on the extension, and also facilitating subsequent welding processing. 3. It can effectively reduce the probability of damage to the extension segment during the reshaping process, and at the same time reduce the probability that changes in the position and state of the ligament during the reshaping process will affect the efficiency and effect of the reshaping. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the casing of an existing ultra-high voltage circuit breaker. Figure 2 This is a schematic diagram of the structure of a pipe forming mold according to Example 1; Figure 3 This is a cross-sectional view of a pipe forming mold according to Embodiment 1; Figure 4 This is a schematic diagram of the mounting base and the structure mounted on the mounting base in Embodiment 1; Figure 5 This is a schematic diagram of the structure of a pipe forming mold according to Example 2; Figure 6 This is a cross-sectional view of a pipe forming mold according to Embodiment 2; Figure 7 This is a schematic diagram of the mounting base and the structure mounted on the mounting base in Embodiment 2.

[0028] Explanation of reference numerals in the attached drawings: 1. Main pipe; 2. Branch pipe; 3. Extension section; 4. Workbench; 41. Storage seat; 411. Clearance opening; 42. Mounting rod; 43. Positioning block; 5. Limiting device; 51. Limiting component; 511. Extension; 52. Limiting space; 6. Shaping device; 61. Airbag; 62. Air nozzle; 63. Limiting plate; 64. Air cushion; 65. Extrusion assembly; 651. Extrusion component; 652. Driving component; 7. Mounting seat; 8. Fixed seat; 9. Roller. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 2-7 This application will be described in further detail. Example 1

[0030] Reference Figure 2 and Figure 3 This application discloses a pipe forming mold for shaping the extension section 3 of the main pipe 1 (the extension section 3 of the main pipe 1 is formed by stamping with a mold, which can easily result in the actual radial dimension of the extension section 3 being smaller than the required radial dimension and the actual arc radius being smaller than the required arc radius), so that the radial dimension and arc radius of the extension section 3 of the main pipe 1 are adapted to the radial dimension and arc radius of the extension section 3 of the branch pipe 2, which facilitates the subsequent welding and fixing of the branch pipe 2 to the main pipe 1 by construction personnel. In this embodiment, the main pipe 1 preferably includes two extension sections 3, which are located on both sides of the main pipe 1, and the axes of the two extension sections 3 coincide.

[0031] The shaping mold includes a worktable 4 for placing and positioning the main pipe 1, a limiting device 5 for limiting the outer side of the extension section 3, a shaping device 6 for shaping the inner side of the extension section 3, and a mounting base 7 for mounting the limiting device 5 and the shaping device 6.

[0032] The workbench 4 has a rectangular parallelepiped structure. Its top has a shelf 41 for placing and positioning the main pipe 1. A vertical opening 411, through which the extension 511 passes, is provided on the shelf 41, and the opening 411 has a circular cross-section. A mounting rod 42 is fixedly installed at the bottom of the workbench 4. The mounting rod 42 has a cylindrical structure, extends vertically upwards, passes through the opening 411, and its top is positioned above the shelf 41, with its axis coinciding with the axis of the opening 411. In this embodiment, preferably, the radial dimension of the opening 411 is close to and larger than the radial dimension of the extension 511.

[0033] The main pipe 1 is positioned on the shelf by passing the top of the mounting rod 42 through the two extension sections 3. When the main pipe 1 is positioned on the shelf, the extension direction of the extension section 3 tends to be vertical. At this time, the bottom of the main pipe 1 contacts and abuts against the shelf 41, and the extension section 3 at the bottom passes through the clearance opening 411. At this time, the top of the mounting rod 42 is above the main pipe 1. In this embodiment, it is preferable that the main pipe 1 is positioned on the shelf 41 with its own axis parallel to the length direction of the worktable 4.

[0034] Reference Figure 2 and Figure 4 The mounting base 7 has a circular plate-like structure. The limiting device 5 and the shaping device 6 are both installed on the mounting base 7, and the limiting device 5 is installed on one side of the axial direction of the mounting base 7.

[0035] Reference Figure 3 and Figure 4 The limiting device 5 includes two limiting members 51 extending along an arc trajectory. One limiting member 51 is fixedly connected to the mounting base 7, and one end of it is hinged to one end of the other limiting member 51, with its rotation axis parallel to the axis of the mounting base 7. The ends of the two limiting members 51 away from the hinge position are detachably connected. When the two limiting members 51 rotate relative to each other until the ends of the two limiting members 51 away from the hinge position can form a connection, a limiting space 52 is formed between the two limiting members 51 on one side of the mounting base 7, which is adapted to the size of the extended section 3 after shaping. The limiting space 52 is cylindrical in shape, and the axis of the limiting space 52 coincides with the axis of the mounting base 7. In this embodiment, it is preferable that the two limiting members 51 are detachably connected by bolts and nuts. Since the above-mentioned detachable connection method is a common prior art, it will not be described in detail here, and it is only briefly shown in the accompanying drawings.

[0036] The shaping device 6 includes an airbag 61 for squeezing and deforming the extension section 3, an air nozzle 62 for controlling the expansion and contraction of the airbag 61, a limiting plate 63 for guiding the expansion and squeezing direction of the airbag 61 and assisting in the placement and positioning of the main tube 1, and an air cushion 64 for improving the placement and positioning accuracy and stability of the main tube 1.

[0037] The airbag 61 has an overall annular structure and is fixedly installed on one side of the mounting base 7 between two limiting members 51, with its axis coinciding with the axis of the mounting base 7. When the two limiting members 51 form a limiting space 52, there is space between the airbag 61 and the limiting members 51 for the extension section 3 to be inserted. In this embodiment, the airbag 61 is preferably made of rubber material.

[0038] One end of the air nozzle 62 is fixedly connected to the airbag 61 and communicates with the internal space of the airbag 61. The other end passes through the mounting base 7 along a direction parallel to the axis of the mounting base 7 and is located on the side of the mounting base 7 away from the airbag 61. It is used for construction personnel to control the inflow and outflow of gas into the airbag 61, thereby facilitating the construction personnel to control the inflation and deflation of the airbag 61. In this embodiment, it is preferable that the construction personnel use an inflation / deflation device to inflate or deflate the airbag 61 through the air nozzle 62, and the air nozzle 62 can effectively ensure that the airbag 61 does not deflate under normal conditions. Since the air nozzle 62 with the above-mentioned functions is common prior art, it will not be described in detail here, and it is only briefly shown in the accompanying drawings.

[0039] The limiting plate 63 has a circular plate-like structure. After being fitted with the mounting rod 42, it is detachably connected to the mounting rod 42, and its axis coincides with the axis of the mounting rod 42 after installation. The installation position of the limiting plate 63 on the mounting rod 42 is adjustable along the axis of the mounting rod 42, so that after the main pipe 1 is placed and positioned on the seat 41, the limiting plate 63 can be located inside the main pipe 1 and close to the top extension section 3. The limiting plate 63 can play a guiding role during the placement and positioning of the main pipe 1, making it easier for the main pipe 1 to extend with the extension section 3. The extension segment 3, positioned vertically and located at the bottom, passes through the clearance opening 411. Simultaneously, the limiting plate 63, positioned below the airbag 61 after the main pipe 1 is placed and positioned, restricts the airbag 61 from expanding towards the internal space of the main pipe 1 after inflation, instead directing it towards the inner wall of the extension segment 3. This allows the inflated airbag 61 to effectively apply outward pressure to the inner side of the extension segment 3 until the outer side of the extension segment 3 contacts and abuts against the limiting member 51, achieving a shaping effect. In this embodiment, preferably, the radial dimension of the limiting plate 63 is smaller than the inner diameter of the extension segment 3.

[0040] The air cushion 64 has an overall annular structure and is fixedly installed on the periphery of the limiting plate 63. It is also elastic and its expansion and contraction are controllable. When the air cushion 64 shrinks to its limit, the outer diameter of the air cushion 64 is smaller than the inner diameter of the extension section 3. At this time, the air cushion 64 can improve the guiding effect of the limiting plate 63 on the placement and positioning of the main pipe 1. When the air cushion 64 expands to its limit, the air cushion 64 can contact and abut against the inner wall of the main pipe 1 near the top of the extension section 3, eliminating the gap between the limiting plate 63 and the inner wall of the main pipe 1, thereby improving the guiding effect of the limiting plate 63 on the expansion direction of the airbag 61, and at the same time, it can apply a vertical upward force to the main pipe 1. In this embodiment, it is preferable that an air pump is installed at the bottom of the workbench 4, and the air pump realizes the expansion and contraction of the air cushion 64 through an air pipe that passes through the limiting plate 63 and communicates with the internal space of the air cushion 64. Since the above-mentioned method for controlling the expansion and contraction of the air cushion 64 is a common prior art, it will not be described in detail here, and it is only briefly shown in the accompanying drawings.

[0041] The main pipe 1 is initially positioned on the shelf 41, with the bottom extension 3 inserted into the clearance opening 411 and the extension direction of the extension 3 tending to be vertical. The mounting base 7 and mounting rod 42 are then inserted and engaged, contacting and abutting against the top extension 3. At this time, the limiting member 51 is located outside the extension 3 and the airbag 61 is located inside the extension 3. A vertically downward force is applied to the mounting base 7 by the positioning block 43, which is threaded into the mounting rod 42, thus clamping and positioning the main pipe 1 between the positioning block 43 and the shelf 41. In this embodiment, it is preferable that the top outer side of the mounting rod 42 has threads, and it is preferable that the positioning block 43 is a nut.

[0042] At this point, by inflating the air cushion 64 to its limit position, the main pipe 1 can be further positioned between the positioning block 43 and the air cushion 64. This also reduces wear on the extension section 3 at the bottom when the main pipe 1 is positioned solely by the positioning block 43. Furthermore, during the expansion of the air cushion 64, it will be compressed by the reaction force of the main pipe 1, giving the air cushion 64 the effect of correcting the alignment of the main pipe 1. This ensures that the axis of the extension section 3 of the main pipe 1, which is finally positioned, coincides with the axis of the mounting rod 42, improving the efficiency and effect of subsequent shaping while also facilitating subsequent welding processing by construction personnel.

[0043] In this embodiment, it is preferable to equip the extension section 3 with different models (i.e. different sizes) with different model (i.e. different sizes) of shaping molds, and the limiting device 5 and shaping device 6 of different shaping molds are all different in size.

[0044] The implementation principle of a pipe forming mold in this application embodiment is as follows: After selecting the appropriate forming mold based on the dimensions of the extension section 3 of the main pipe 1, first install the limiting plate 63 at a suitable position on the mounting rod 42, and then hoist the main pipe 1 onto the placement seat 41. During the placement and positioning of the main pipe 1 on the placement seat 41, the extension section 3 at the bottom can smoothly pass through the clearance opening 411 with the help of the top of the mounting rod 42 and the limiting plate 63, completing the initial placement and positioning of the main pipe 1 on the placement seat 41. Next, install the mounting base 7 on the mounting rod 42 so that the mounting base 7 contacts and abuts against the extension section 3 at the top, and then control the limiting member 51 to rotate to form a surrounding enclosure. The extension section 3 is limited by a space 52; then, the air cushion 64 is controlled to expand to its limit, driving the main pipe 1 to be further positioned while correcting the deviation of the main pipe 1, thereby improving the accuracy and stability of the placement and positioning of the main pipe 1; then, the air bag 61 is inflated through the air nozzle 62, and after the air bag 61 expands, it fills the internal space of the extension section 3, and under the limitation of the limiting member 51 and the air cushion 64, the air bag 61 is guided to expand and contact the inner wall of the extension section 3 and apply extrusion force outward, driving the extension section 3 to deform outward until its outer side contacts and abuts the limiting member 51. At this time, the shaping of the extension section 3 at the top of the main pipe 1 is completed. Example 2

[0045] Reference Figure 5 and Figure 6 The difference between this embodiment and embodiment 1 is that the limiting device 5 and the shaping device 6 are used, and the shaping mold also includes a fixing seat 8. Compared with embodiment 1, this embodiment enhances the strength of shaping the extension section 3 of the main tube 1, and adopts a partial to full shaping method, which can further ensure the shaping effect.

[0046] Reference Figure 6 and Figure 7 The end of the limiting member 51 away from the hinge position has an extension 511. When the extension 3 is located in the limiting space 52, there is a space between the position of the limiting member 51 near the extension 3 and the extension 3 for the extension 3 to deform after being subjected to compressive force, which reduces the probability that the extension 3 will be damaged or even cracked at the junction of its un-shaped area and the shaped area due to high-intensity shaping in a local area.

[0047] The shaping device 6 includes a plurality of extrusion components 65 for applying an extrusion force to the inner side of the extension section 3. The plurality of extrusion components 65 are arranged in a circumferential array with the axis of the mounting base 7 as the axis. The plurality of extrusion components 65 are all located between two limiting members 51 and are close to the limiting members 51 that are fixedly connected to the mounting base 7.

[0048] The extrusion assembly 65 includes an extruder 651 and a drive member 652. The extruder 651 is movably connected to the mounting base 7 along the radial direction of the mounting base 7. The drive member 652 is fixedly installed inside the mounting base 7 and is used to drive the extruder 651 to move relative to the mounting base 7. In this embodiment, the drive member 652 is preferably a servo cylinder, and preferably multiple drive members 652 drive multiple extruders 651 to move synchronously and in the same direction (closer to or away from the axis) relative to the axis of the mounting base 7. Since the drive member 652 with the above functions is common prior art, it will not be described in detail here, and it is only briefly shown in the drawings.

[0049] The fixed base 8 has a circular plate-like structure. The mounting base 7 is rotatably installed on one side of the fixed base 8 along its axis, and the axis of rotation of the mounting base 7 coincides with its own axis and the axis of the fixed base 8. After the fixed base 8 and the mounting rod 42 are inserted and engaged, the mounting base 7 contacts and abuts against the extension section 3 located at the top to complete the installation. At this time, the limiting member 51 is located on the outside of the extension section 3 and multiple pressing members 651 are located on the inside of the extension section 3. At this time, the positioning block 43, which is threaded with the mounting rod 42, applies a vertical downward force to the fixed base 8, so that the main pipe 1 is clamped and positioned between the positioning block 43 and the placement seat 41.

[0050] After the supervisor 1 places the extension 3, which is positioned on the base 41 and located at the top, in the limiting space 52, multiple driving components 652 can be controlled to drive multiple extrusion components 651 to move towards the inner wall of the extension 3, so that multiple extrusion components 65 can simultaneously shape a local area of ​​the extension 3. At this time, the extensions 511 of the two limiting components 51 overlap and extend outward along the horizontal and perpendicular axis of the limiting space 52, which makes it convenient for construction personnel to drive the mounting base 7 to rotate relative to the fixed base 8 directly or indirectly by means of tools using the overlapping extensions 511. After the mounting base 7 rotates relative to the fixed base 8, it will change the shaping position of the multiple extrusion components 65 on the extension 3.

[0051] Furthermore, in order to reduce the damage to the inner wall of the extension section 3 caused by the rotating mounting base 7 when the multiple extrusion components 65 shape the extension section 3, it is preferable that a roller 9 for direct contact with the inner wall of the extension section 3 is rotatably mounted on the extrusion component 651, and the rotation axis of the roller 9 is parallel to the rotation axis of the mounting base 7.

[0052] The implementation principle of a pipe forming mold in this application embodiment is as follows: After selecting the appropriate forming mold based on the dimensions of the extension section 3 of the main pipe 1, the main pipe 1 is hoisted and placed on the placement base 41. During the placement and positioning of the main pipe 1 on the placement base 41, the extension section 3 at the bottom is smoothly inserted into the clearance opening 411 by means of the top of the mounting rod 42, completing the initial placement and positioning of the main pipe 1 on the placement base 41. Next, the fixing seat 8 is installed on the mounting rod 42, so that the mounting seat 7 contacts and abuts against the extension section 3 at the top, and then the limiting member 51 is controlled to rotate to form a limiting space 52 surrounding the extension section 3. Afterwards, multiple driving members 652 are controlled to drive multiple extrusions. The component 651 contacts and abuts against the inner wall of the extension section 3 via the roller 9, causing the part of the extension section 3 in contact with the roller 9 to deform outward until its outer wall contacts and abuts against the limiting component 51. After the extension section 3 is partially shaped, the construction personnel use the overlapping extension part 511 to directly or indirectly drive the mounting base 7 to rotate one revolution relative to the fixed base 8. During the rotation of the mounting base 7, the extrusion component 651 will be driven to roll through the roller 9 to fully shape the extension section 3. After the mounting base 7 is driven to rotate several revolutions relative to the fixed base 8, the shaping of the extension section 3 at the top of the main pipe 1 is completed and the effect is more reliable.

[0053] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A forming mold for pipes, characterized in that, It includes a limiting device (5), a shaping device (6), and a mounting base (7) for mounting the limiting device (5) and the shaping device (6). The limiting device (5) includes two limiting members (51); one end of the two limiting members (51) is hinged and the other end is detachably connected, and after the ends of the two limiting members (51) away from the hinge point are connected, a limiting space (52) for assisting the shaping of the extension section (3) of the main tube (1) is formed between the two limiting members (51). One of the limiting members (51) is fixedly connected to the mounting base (7), the shaping device (6) is disposed on one side of the mounting base (7), and the shaping device (6) is located between the two limiting members (51); When the extension segment (3) enters the limiting space (52), the shaping device (6) is located inside the extension segment (3) and is used to squeeze the inside of the extension segment (3) outward.

2. The pipe forming mold according to claim 1, characterized in that, It also includes a workbench (4) for assisting the supervisor (1) in positioning. The workbench (4) has a shelf (41) on its top, and the shelf (41) has a vertical opening (411) through which the extension section (3) passes; the workbench (4) has a mounting rod (42) that passes through the vertical opening (411), and the axis of the mounting rod (42) coincides with the axis of the opening (411); After the main tube (1) is placed on the storage seat (41), the extension section (3) extends vertically and the extension section (3) at the bottom passes through the relief opening (411), and the mounting rod (42) passes through the extension section (3) at the top; after the extension section (3) at the top enters the limiting space (52), the mounting seat (7) is connected to the mounting rod (42).

3. The forming mold for a pipe according to claim 2, characterized in that, The shaping device (6) includes an airbag (61) and an air nozzle (62). The airbag (61) is fixedly connected to the mounting base (7), and after it is inflated, it is used to contact and squeeze the inner wall of the extension section (3); one end of the air nozzle (62) is connected to the airbag (61) and the other end extends out of the mounting base (7), and it is used to control the gas entering and leaving the airbag (61).

4. The pipe forming mold according to claim 3, characterized in that, The shaping device (6) also includes a limiting plate (63) for limiting the airbag (61). The limiting plate (63) is disposed on the mounting rod (42), and its cross-sectional dimension is smaller than the internal dimension of the extension section (3). When the mounting seat (7) is connected to the mounting rod (42), the limiting plate (63) is located below the airbag (61), limiting the degree of expansion of the airbag (61) in the vertical direction after inflation.

5. The forming mold for a pipe according to claim 4, characterized in that, The shaping device (6) also includes an elastic air cushion (64). The air cushion (64) is disposed on the periphery of the limiting plate (63), and the limiting plate (63) contacts and abuts against the inner wall of the main pipe (1) through the air cushion (64).

6. The forming mold for a pipe according to claim 5, characterized in that, The air cushion (64) is adjustable in expansion and contraction. After it expands, it contacts and abuts against the inner wall of the main tube (1) near the extension section (3), exerting a vertically upward force on the main tube (1) and driving the main tube (1) to maintain the vertically extended position of the extension section (3). After the mounting base (7) is connected to the mounting rod (42), it applies a downward force to the main tube (1), and the main tube (1) is positioned between the mounting base (7) and the air cushion (64).

7. The forming mold for a pipe according to claim 2, characterized in that, It also includes a fixed base (8), the mounting base (7) is rotatably connected to the fixed base (8), its rotation axis coincides with its own axis, and the fixed base (8) is detachably connected to the mounting rod (42); The shaping device (6) includes a plurality of extrusion components (65); the extrusion components (65) are disposed on the mounting base (7) and located between the two limiting members (51), and the plurality of extrusion components (65) are arranged in a circular array with the axis of the mounting base (7) as the axis and are all close to the limiting members (51) that are fixedly connected to the mounting base (7). The extrusion assembly (65) includes an extruder (651) and a drive (652); the extruder (651) is radially movably connected to the mounting base (7), the drive (652) drives the extruder (651) to move, and a plurality of the extruders (651) move synchronously and in the same direction relative to the axis of the mounting base (7).

8. The forming mold for a pipe according to claim 7, characterized in that, After the two limiting members (51) are enclosed to form a limiting space (52), a space is formed between the end of the limiting member (51) away from the hinge position and the extension section (3) for the extension section (3) to deform.

9. A pipe forming mold according to claim 7, characterized in that, The extruder (651) is rotatably provided with a roller (9) for direct contact with the inner wall of the extension section (3), and the rotation axis of the roller (9) is parallel to the rotation axis of the mounting base (7).

10. A pipe forming mold according to claim 7, characterized in that, The limiting member (51) has an extension (511) at one end away from the hinge position; after the two limiting members (51) are enclosed to form a limiting space (52), the two extensions (511) are stacked to form a structure that facilitates the construction personnel to control the rotation of the mounting base (7).

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