A flaring device for producing HDPE double-wall corrugated pipes
By designing an adjustable HDPE double-wall corrugated pipe flaring device, the problems of frequent mold changes and non-circular shapes were solved, achieving rapid adaptation and circular flaring, improving flaring efficiency and simplifying subsequent processing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GANSU YUTAI RUNTONG PLASTIC CO LTD
- Filing Date
- 2025-06-17
- Publication Date
- 2026-07-17
AI Technical Summary
Existing HDPE double-wall corrugated pipe flaring devices require frequent mold changes, resulting in low flaring efficiency and difficulty in maintaining a round shape after flaring, necessitating complex shaping processes.
A flaring device is designed, comprising a frame assembly, a flaring push assembly, a rotating disk, and a spreading assembly. By rotating the spreading assembly, the device drills into the HDPE double-wall corrugated pipe after heating, maintaining the circular shape of the flared end, and the size is adjustable.
It enables rapid adaptation and flaring of HDPE double-wall corrugated pipes of different specifications, maintaining a circular shape, simplifying subsequent shaping steps, and improving flaring efficiency and applicability.
Smart Images

Figure CN224510410U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of pipe processing technology, specifically to a flaring device for producing HDPE double-wall corrugated pipes. Background Technology
[0002] HDPE double-wall corrugated pipe is a type of pipe made of high-density polyethylene. It has an inner and outer layer structure, typically with a smooth outer layer and a corrugated inner layer. The corrugated structure of the inner layer increases the pipe's flexibility and resilience, making it more suitable for applications requiring adaptation to underground conditions. After production, existing HDPE double-wall corrugated pipes require flaring at the opening to ensure proper subsequent processing. Current technology typically uses a fixed-size flaring mold to operate the pipe. The mold is inserted into the opening, and the pipe is then softened through heat treatment. The opening is then completed by the extrusion of the mold. However, existing methods require frequent mold changes depending on the opening specifications of the HDPE double-wall corrugated pipe, resulting in reduced flaring efficiency when dealing with pipes of different opening sizes.
[0003] The publication number CN222645342U discloses a flaring device for producing HDPE double-wall corrugated pipes. This utility model provides a flaring device for producing HDPE double-wall corrugated pipes that can be adapted and adjusted according to the opening specifications. The flaring device includes a mounting frame, a drive assembly, a guide frame, a spreading assembly, and a heating mechanism. The drive assembly is connected to the top of the mounting frame, the guide frame is connected to the upper part of the mounting frame, the spreading assembly is connected between the guide frame and the drive assembly, and the heating mechanism is provided on the guide frame. This utility model adapts HDPE double-wall corrugated pipes of any opening specification by adjusting the spreading assembly. After adaptation, the opening of the HDPE double-wall corrugated pipe is quickly softened by the cooperation of the spreading assembly and the heating ring, thereby improving the flaring efficiency.
[0004] During the flaring operation, the expanding component 4 slides to the right along the guide frame 3 to flare the HDPE double-wall corrugated pipe. At this time, because the HDPE double-wall corrugated pipe has been heated and softened, and due to the shape of the expanding component 4, the HDPE double-wall corrugated pipe after the flaring operation is prone to being square. It is necessary to reshape and round the HDPE double-wall corrugated pipe before it can be used, which is quite complicated. Therefore, it is necessary to design a flaring device for the production of HDPE double-wall corrugated pipe to solve the above problems. Utility Model Content
[0005] To address the shortcomings of existing technologies, this utility model provides a flaring device for the production of HDPE double-wall corrugated pipes.
[0006] To achieve the above objectives, the technical solution of this utility model is as follows: A flaring device for producing HDPE double-wall corrugated pipes includes: a frame assembly and a flaring pushing assembly, the flaring pushing assembly sliding back and forth on the top of the frame assembly; a rotating disk and a spreading assembly, the rotating disk being mounted on the front side of the flaring pushing assembly and rotating on the front side of the flaring pushing assembly, the spreading assembly being disposed on the front side of the rotating disk; and a heating ring, the heating ring being mounted on the front side of the flaring pushing assembly, the spreading assembly being located at the center of the inner cavity of the heating ring.
[0007] Preferably, the frame assembly includes two base plates, which are welded together by two guide columns, and a threaded rod is rotatably connected at the center between the two base plates.
[0008] Preferably, the flaring push assembly includes a sliding plate that slides on the surface of the guide post, the sliding plate being threadedly connected to the surface of the threaded rod, a support plate being welded to the top of the sliding plate, a control disk being fixedly mounted on the top of the support plate, and a rotating disk being rotatably connected to the front side of the control disk.
[0009] Preferably, the heating ring is fixedly mounted on the surface of the control panel by multiple mounting brackets.
[0010] Preferably, the spreading assembly includes an arc-shaped spreading plate that slides on the front side of the rotating disk. The number of arc-shaped spreading plates is N, and the N arc-shaped spreading plates are arranged in a ring on the surface of the rotating disk. A slider is fixedly installed on the rear side of the arc-shaped spreading plate, and a groove for the slider to slide is opened on the front side of the rotating disk. A buffer plate is welded to the front side of the arc-shaped spreading plate.
[0011] Preferably, a fixed column is welded to the center of the front side of the rotating disk, a rotating rod is rotatably connected to the front side of the fixed column, a sliding mounting plate is threadedly connected to the surface of the rotating rod, and N support rods are rotatably connected to the surfaces of the sliding mounting plate and the fixed column. Two support rods on the same side are rotatably connected to each other, and the other ends of the two support rods are rotatably connected and slidably connected to the surface of the arc-shaped support plate, respectively.
[0012] Preferably, the number of N is 4.
[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model uses a rotating disc to drive the opening component to rotate, so that the opening component can rotate and drill into the HDPE double-wall corrugated pipe to perform the flaring operation, keeping the flared part of the HDPE double-wall corrugated pipe round, which is convenient for subsequent use. 2. By setting up the expansion component, this utility model can expand HDPE double-wall corrugated pipes of different specified sizes according to actual needs, and expand HDPE double-wall corrugated pipes into different sizes. 3. By setting up a buffer plate, this utility model can slowly open the inner cavity of the softened HDPE double-wall corrugated pipe when drilling into it, thus preventing the arc-shaped expansion plate from suddenly drilling in and causing damage to the HDPE double-wall corrugated pipe. Attached Figure Description
[0014] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts. Wherein: Figure 1 This is a perspective view of one embodiment of the present utility model; Figure 2 This is a three-dimensional disassembled schematic diagram of one embodiment of the present utility model; Figure 3 This is a three-dimensional disassembled schematic diagram of the supporting component according to an embodiment of the present invention.
[0015] The attached diagram lists the components represented by each number as follows: 1. Frame assembly; 11. Base plate; 12. Guide column; 13. Threaded rod; 2. Flared push assembly; 21. Sliding plate; 22. Support plate; 23. Control panel; 3. Rotating plate; 31. Slide groove; 4. Spreading assembly; 41. Arc-shaped spreading plate; 42. Buffer plate; 43. Sliding block; 44. Fixed column; 45. Rotating rod; 46. Sliding mounting plate; 47. Support rod; 5. Heating ring; 6. Mounting bracket. Detailed Implementation
[0016] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.
[0017] In the following description, embodiments of the flaring device for producing HDPE double-wall corrugated pipes according to the present invention will be described with reference to the accompanying drawings.
[0018] Figure 1-3 This invention illustrates a flaring device for producing HDPE double-wall corrugated pipes according to an embodiment of the present invention, comprising: The frame assembly 1 and the flared push assembly 2 slide back and forth on the top of the frame assembly 1. Specifically, the frame assembly 1 includes two base plates 11, which are welded together by two guide posts 12. A threaded rod 13 is rotatably connected at the center between the two base plates 11. Specifically, the flared push assembly 2 includes a sliding plate 21 that slides on the surface of the guide posts 12. The sliding plate 21 is threadedly connected to the surface of the threaded rod 13. A support plate 22 is welded to the top of the sliding plate 21. A control panel 23 is fixedly installed on the top of the support plate 22. A rotating disk 3 is rotatably connected to the front side of the control panel 23. The system also includes a rotating disk 3 and a spreading assembly 4. The rotating disk 3 is installed in front of the flaring push assembly 2 and rotates in front of the flaring push assembly 2. The spreading assembly 4 is located in front of the rotating disk 3. Specifically, the spreading assembly 4 includes N arc-shaped spreading plates 41 that slide in front of the rotating disk 3. The N arc-shaped spreading plates 41 are arranged in a ring on the surface of the rotating disk 3. A slider 43 is fixedly installed on the rear side of the arc-shaped spreading plate 41. A groove 31 for the slider 43 to slide is opened on the front side of the rotating disk 3. A buffer plate 42 is welded to the front side of the arc-shaped spreading plate 41. With the setting of the buffer plate 42, when flaring and drilling into the HDPE double-wall corrugated pipe, the buffer plate 42 can slowly open the softened HDPE double-wall corrugated pipe first. The inner cavity is designed to prevent the arc-shaped expansion plate 41 from suddenly penetrating and causing damage to the HDPE double-wall corrugated pipe. Specifically, a fixed column 44 is welded to the center of the front side of the rotating disk 3. A rotating rod 45 is rotatably connected to the front side of the fixed column 44. A sliding mounting plate 46 is threadedly connected to the surface of the rotating rod 45. N support rods 47 are rotatably connected to the surfaces of the sliding mounting plate 46 and the fixed column 44. Two support rods 47 on the same side are rotatably connected to each other. The other ends of the two support rods 47 are rotatably connected and slidably connected to the surface of the arc-shaped expansion plate 41, respectively. Specifically, the number of N is 4. The expansion component 4 can be set up to expand HDPE double-wall corrugated pipes of different specified sizes according to actual needs and to expand HDPE double-wall corrugated pipes into different sizes. It also includes a heating ring 5, which is installed on the front side of the flaring push assembly 2. The opening assembly 4 is located at the center of the inner cavity of the heating ring 5. Specifically, the heating ring 5 is fixedly installed on the surface of the control panel 23 by multiple mounting brackets 6.
[0019] Working principle: When using this utility model, the user uses a clamp to fix and lock the HDPE double-wall corrugated pipe. Then, the buffer plate 42 is aligned with the center of the inner cavity of the HDPE double-wall corrugated pipe, and the rotating rod 45 is rotated according to the flare size. This causes the sliding mounting plate 46 to slide on the surface of the rotating rod 45, which in turn causes the support rods 47 to rotate, thereby pushing the arc-shaped expansion plate 41 to slide on the surface of the rotating plate 3. At this time, the slider 43 will slide in the inner cavity of the groove 31. After the ring formed by the arc-shaped expansion plate 41 meets the flare size, the two nuts on the surface of the rotating rod 45 will be used to lock the sliding plate 43. The mounting plate 46 is locked onto the surface of the rotating rod 45, and the switch of the heating ring 5 is turned on to start the heating ring 5, so that the heating ring 5 heats and softens the flared part of the HDPE double-wall corrugated pipe; then the rotating plate 3 is controlled by the control plate 23 to rotate, which drives the arc-shaped expansion plate 41 to rotate, so that the arc-shaped expansion plate 41 rotates in the inner cavity of the HDPE double-wall corrugated pipe, and in conjunction with the rotation of the threaded rod 13, drives the sliding plate 21 to slide forward on the surface of the guide post 12, thereby driving the arc-shaped expansion plate 41 to drill into the inner cavity of the HDPE double-wall corrugated pipe, and to perform the flaring operation on the softened HDPE double-wall corrugated pipe.
[0020] In summary, the flaring device for producing HDPE double-wall corrugated pipes uses a rotating disk 3 to drive the opening component 4 to rotate, allowing the opening component 4 to rotate and drill into the HDPE double-wall corrugated pipe to perform the flaring operation, ensuring that the flared end of the HDPE double-wall corrugated pipe remains round, facilitating subsequent use.
[0021] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.
Claims
1. A device for flaring HDPE double wall corrugated pipe production, characterized in that, include: The frame assembly (1) and the flaring push assembly (2) slide back and forth on the top of the frame assembly (1); A rotating disk (3) and a spreading assembly (4) are provided. The rotating disk (3) is mounted on the front side of the flaring pushing assembly (2) and rotates on the front side of the flaring pushing assembly (2). The spreading assembly (4) is provided on the front side of the rotating disk (3). Heating ring (5) is installed on the front side of the flaring push assembly (2), and the spreading assembly (4) is located at the center of the inner cavity of the heating ring (5).
2. A device for producing a flared end of a HDPE double wall corrugated pipe according to claim 1, characterized in that: The frame assembly (1) includes two base plates (11), which are welded together by two guide posts (12), and a threaded rod (13) is rotatably connected at the center between the two base plates (11).
3. A device for producing a flared end of a HDPE double wall corrugated pipe according to claim 2, characterized in that: The flaring push assembly (2) includes a sliding plate (21) that slides on the surface of the guide post (12), the sliding plate (21) being threadedly connected to the surface of the threaded rod (13), a support plate (22) being welded to the top of the sliding plate (21), a control disk (23) being fixedly installed on the top of the support plate (22), and a rotating disk (3) being rotatably connected to the front side of the control disk (23).
4. A device for producing a flared end of a HDPE double wall corrugated pipe according to claim 3, characterized in that: The heating ring (5) is fixedly mounted on the surface of the control panel (23) by multiple mounting brackets (6).
5. A device for producing a flared end of a HDPE double wall corrugated pipe according to claim 1, characterized in that: The spreading assembly (4) includes an arc-shaped spreading plate (41) that slides on the front side of the rotating disk (3). There are four arc-shaped spreading plates (41). The arc-shaped spreading plates (41) are arranged in a ring on the surface of the rotating disk (3). A slider (43) is fixedly installed on the rear side of the arc-shaped spreading plate (41). A groove (31) for the slider (43) to slide is opened on the front side of the rotating disk (3). A buffer plate (42) is welded to the front side of the arc-shaped spreading plate (41).
6. A device for producing a flared end of a HDPE double wall corrugated pipe according to claim 5, characterized in that: A fixed column (44) is welded to the center of the front side of the rotating disk (3). A rotating rod (45) is rotatably connected to the front side of the fixed column (44). A sliding mounting plate (46) is threadedly connected to the surface of the rotating rod (45). Four support rods (47) are rotatably connected to the surfaces of the sliding mounting plate (46) and the fixed column (44). Two support rods (47) on the same side are rotatably connected to each other. The other ends of the two support rods (47) are rotatably connected and slidably connected to the surface of the arc-shaped support plate (41), respectively.