Radial stretching device for PVC-O tubing

Abstract

The utility model discloses a PVC -O tubular product radial stretching device, including the bottom plate, the bottom plate is fixed with the expanding chamber, the bottom plate one end is fixed with the fixed end plate, the fixed end plate is fixed with the horizontal fixed shaft, the fixed shaft is fixed with the expanding block in the expanding chamber, the bottom plate is equipped with the push -board sliding, the bottom plate outside is installed with the drive structure of being connected in the push -board, the push -board is installed with the clamping structure, the push -board outside is fixed with the ring abutment plate of same inner diameter with tubular product, and the abutment plate is abutted in one end of tubular product, the outer diameter of abutment plate is greater than the initial outer diameter of tubular product and is not less than the outer diameter of tubular product after stretching, and is used for pushing the end of tubular product to the expanding chamber. The utility model belongs to PVC -O tubular product stretching technical field, and specifically refers to a kind of PVC -O tubular product radial stretching device.

Description

Technical Field

[0001] This utility model belongs to the field of PVC-O pipe stretching technology, specifically referring to a PVC-O pipe radial stretching device. Background Technology

[0002] In the manufacturing of PVC-O pipes, the manufacturing process plays a decisive role in the performance of the pipes. As an advanced form of PVC pipe, PVC-O pipes require axial and radial stretching of PVC-U pipes to allow the long-chain molecules of PVC to be arranged in a biaxial and regular pattern, thereby obtaining superior performance.

[0003] Currently, the existing publicly authorized patent CN220095532U for the radial stretching device of PVC-O pipes uses a method of placing the end of the pipe between clamping plates, using a drive cylinder to push the clamping plates to clamp the pipe, and then using a slide rail to allow the movable plate to move the pipe to fit over the outside of the expansion plate to achieve stretching.

[0004] The device has significant drawbacks: when the entire pipe is radially stretched, it is difficult to expand the diameter of the pipe at the clamping plate, which affects the improvement of the overall performance of the pipe; in addition, the movable plate and clamping plate are inconvenient to move and lack flexibility, which not only reduces production efficiency, but also affects the stability of the pipe stretching quality, and cannot meet the growing production demand and high-quality product requirements. Utility Model Content

[0005] In view of the above situation and to overcome the defects of the prior art, this utility model provides a radial stretching device for PVC-O pipes, which effectively solves the problem that the pipe diameter is difficult to expand at the clamping plate and the lack of flexibility affects the stretching quality.

[0006] To achieve the above functions, the technical solution adopted by this utility model is as follows: a PVC-O pipe radial stretching device, including a base plate, an expansion cavity fixed on the base plate, a fixed end plate fixed on one end of the base plate, a horizontal fixed shaft fixed on the fixed end plate, and an expansion block located in the expansion cavity fixed on the fixed shaft;

[0007] A push plate is slidably provided on the base plate, a drive structure connected to the push plate is installed on the outer side of the base plate, and a clamping structure is installed on the push plate;

[0008] An annular abutment plate with the same inner diameter as the pipe is fixed on the outer surface of the push plate. The abutment plate abuts against one end of the pipe. The outer diameter of the abutment plate is larger than the initial outer diameter of the pipe and not less than the outer diameter of the pipe after stretching. It is used to push the end of the pipe into the expansion cavity.

[0009] Preferably, the expanding block is conical, with a conical front end and a cylindrical rear end, and the length of the abutment plate is greater than the conical end.

[0010] Preferably, the clamping structure includes a fixing frame, which is symmetrically fixed on both sides of the push plate. A telescopic cylinder is horizontally fixed on the side wall of the fixing frame, and a clamping plate is fixed to the movable end of the telescopic cylinder.

[0011] Preferably, a J-shaped push rod is fixed at one end of the fixing frame and located at one end of the expansion cavity, and the center line of the bent end of the push rod is located on the side wall of the expanded pipe.

[0012] Preferably, the drive structure includes an outer plate, which is fixed in pairs on the outer side of the base plate. A drive motor is mounted on the outer plate, and a horizontal threaded rod connected to the output end of the drive motor is rotatably provided on the outer plate. The threaded rod is threadedly connected to the push plate.

[0013] Preferably, the expansion cavity is provided with a rotary heating structure; the rotary heating structure includes a heating ring plate, which is rotatably disposed in the expansion cavity, and a plurality of heating plates are evenly spaced on the inner wall of the heating ring plate. Annular teeth are arranged on the outer surface of the end of the heating ring plate. A rotary motor is provided at the bottom of the expansion cavity, and a gear is fixed at the output end of the rotary motor. The gear and the annular teeth are meshed together.

[0014] The beneficial effects achieved by adopting the above-described structure are as follows:

[0015] 1. This application drives the push plate and clamping structure to move through a drive structure, making the movement of the push plate and clamping structure more flexible. The abutment plate is fixed on the push plate, which can effectively push the pipe, so that the entire pipe can be stretched evenly. This avoids the problem that the pipe cannot be expanded at the clamping plate in the prior art, and greatly improves the overall tensile quality and performance of the pipe.

[0016] 2. A push rod is set at the other end of the push plate. After stretching, the push rod can be used to push the pipe back, making it convenient and quick to remove the pipe. This reduces the difficulty and time cost of manual operation and improves production efficiency.

[0017] 3. A rotatable heating ring plate is installed in the expansion cavity, which can uniformly heat the expansion block and the pipe fitting, ensuring that the pipe is radially stretched at a suitable temperature. Suitable temperature conditions help the molecular chains rearrange, so that the pipe can obtain better orientation during the stretching process, thereby improving the strength, toughness and other properties of the pipe. Attached Figure Description

[0018] Figure 1 This invention provides a schematic diagram of the overall structure of a radial stretching device for PVC-O pipes. Figure 1 ;

[0019] Figure 2This is a cross-sectional view of a radial tensioning device for PVC-O pipes proposed in this utility model;

[0020] Figure 3 This is a top view of a radial stretching device for PVC-O pipes proposed in this utility model;

[0021] Figure 4 This invention provides a schematic diagram of the overall structure of a radial stretching device for PVC-O pipes. Figure 2 ;

[0022] Figure 5 This is a front view of a radial stretching device for PVC-O pipes proposed in this utility model.

[0023] Among them, 1. base plate, 2. expansion cavity, 3. fixed end plate, 4. fixed shaft, 5. expansion block, 6. push plate, 7. drive structure, 8. clamping structure, 9. abutment plate, 10. fixed frame, 11. telescopic cylinder, 12. clamping plate, 13. push rod, 14. outer plate, 15. drive motor, 16. rotary heating structure, 17. heating ring plate, 18. heating plate, 19. rotary motor, 20. ring tooth, 21. gear, 22. threaded rod. Detailed Implementation

[0024] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0025] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The utility model will be further described in detail below with reference to the accompanying drawings.

[0026] like Figure 1-5As shown, the present invention proposes a radial stretching device for PVC-O pipes, comprising a base plate 1, an expansion cavity 2 fixed on the base plate 1, a fixed end plate 3 fixed on one end of the base plate 1, a horizontal fixed shaft 4 fixed on the fixed end plate 3, and an expansion block 5 located inside the expansion cavity 2 fixed on the fixed shaft 4; a push plate 6 is slidably provided on the base plate 1, and a driving structure 7 connected to the push plate 6 is installed on the outer side of the base plate 1 to drive the push plate 6 to move; a clamping structure 8 is installed on the push plate 6 to clamp and fix the pipe.

[0027] like Figure 2 , 3 As shown, an annular abutment plate 9 with the same inner diameter as the pipe is fixed on the outer surface of the push plate 6. The abutment plate 9 abuts against one end of the pipe. The outer diameter of the abutment plate 9 is greater than the initial outer diameter of the pipe and not less than the outer diameter of the pipe after stretching. It is used to push the end of the pipe into the expansion cavity 2. The expansion block 5 is conical, with a conical section at the front end and a cylindrical section at the rear end. The length of the abutment plate 9 is greater than the conical end, which facilitates radial stretching of the entire pipe.

[0028] like Figure 3 As shown, the clamping structure 8 includes a fixing frame 10, which is symmetrically fixed on both sides of the push plate 6. A telescopic cylinder 11 is horizontally fixed on the side wall of the fixing frame 10. A clamping plate 12 is fixed to the movable end of the telescopic cylinder 11. The telescopic cylinder 11 extends and drives the clamping plate 12 to clamp and fix the pipe. A J-shaped push rod 13 is fixed at one end of the fixing frame 10 and located at one end of the expansion cavity 2. The center line of the bent end of the push rod 13 is located on the side wall of the expanded pipe and is used to push the radially stretched pipe back for easy removal.

[0029] like Figure 1 , 3 As shown, the drive structure 7 includes an outer plate 14, which is fixed in pairs on the outer side of the base plate 1. A drive motor 15 is mounted on the outer plate 14. A horizontal threaded rod 22 connected to the output end of the drive motor 15 is rotatably provided on the outer plate 14. The threaded rod 22 is threadedly connected to the push plate 6. The drive motor 15 drives the threaded rod 22 to rotate, and the threaded rod 22 drives the push plate 6 to move, which in turn drives the clamping structure 8 to move, moving the pipe toward the expansion block 5.

[0030] like Figure 4 , 5As shown, a rotary heating structure 16 is provided inside the expansion cavity 2. The rotary heating structure 16 includes a heating ring plate 17, which is rotatably disposed inside the expansion cavity 2. Several heating plates 18 are evenly spaced on the inner wall of the heating ring plate 17. The heating plates 18 are ceramic infrared heaters. Annular teeth 20 are arranged on the outer surface of the end of the heating ring plate 17. A rotary motor 19 is provided at the bottom of the expansion cavity 2. A gear 21 is fixed at the output end of the rotary motor 19. The gear 21 and the annular teeth 20 are meshed. The rotary motor 19 drives the gear 21 to rotate while simultaneously driving the annular teeth 20 and the heating ring plate 17 to rotate, thereby driving the heating plates 18 to rotate and uniformly heat the pipe.

[0031] In practical use, firstly, the PVC-O pipe to be stretched is placed between the clamping plates 12 of the clamping structure 8, with one end abutting against the abutment plate 9. The telescopic cylinder 11 is activated, causing the clamping plates 12 to clamp the pipe. Then, the drive motor 15 is activated, which drives the push plate 6 to move via the threaded rod 22, gradually bringing the pipe closer to the expansion block 5. Once one end of the pipe enters the expansion block 5, the heating ring plate 17 is activated to heat the expansion block 5 and the pipe. Simultaneously, the rotary motor 19 drives the gear 21 to rotate, which in turn drives the ring gear 20 and the heating ring plate 17 to rotate, thereby rotating the heating plate 18 to uniformly heat the pipe. The push plate 6 continues to push the pipe, and the expansion block 5 radially stretches the pipe. During the stretching process, the drive... Structure 7 continuously drives the pipe to move. When the clamping plate 12 approaches the expansion cavity 2, the telescopic cylinder 11 retracts the clamping plate 12 and moves it outside the expansion cavity 2. The pipe is then pushed further by the abutment plate 9, so that the entire pipe can be stretched evenly. After the pipe is fully stretched, heating is stopped, and cold air enters the expansion cavity 2 to cool and shape the radially stretched pipe, ensuring the radial strength of the PVC-O pipe. After cooling, the drive motor 15 reverses and pushes the pipe back through the push rod 13, making it easy to remove the pipe.

[0032] 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 inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A radial stretching device for PVC-O pipes, characterized in that: Includes a base plate (1), on which an expansion cavity (2) is fixed, and a fixed end plate (3) is fixed at one end of the base plate (1). A horizontal fixed shaft (4) is fixed on the fixed end plate (3), and an expansion block (5) located inside the expansion cavity (2) is fixed on the fixed shaft (4). A push plate (6) is slidably provided on the base plate (1), and a drive structure (7) connected to the push plate (6) is installed on the outer side of the base plate (1). A clamping structure (8) is installed on the push plate (6). An annular abutment plate (9) with the same inner diameter as the pipe is fixed on the outer surface of the push plate (6). The abutment plate (9) abuts against one end of the pipe. The outer diameter of the abutment plate (9) is greater than the initial outer diameter of the pipe and not less than the outer diameter of the pipe after stretching. It is used to push the end of the pipe into the expansion cavity (2).

2. The radial stretching device for PVC-O pipes according to claim 1, characterized in that: The expanding block (5) is conical, with a conical section at the front end and a cylindrical section at the rear end. The length of the abutment plate (9) is greater than that of the conical end.

3. A radial stretching device for PVC-O pipes according to any one of claims 1 or 2, characterized in that: The clamping structure (8) includes a fixing frame (10), which is symmetrically fixed on both sides of the push plate (6). A telescopic cylinder (11) is horizontally fixed on the side wall of the fixing frame (10), and a clamping plate (12) is fixed to the movable end of the telescopic cylinder (11).

4. The radial stretching device for PVC-O pipes according to claim 3, characterized in that: One end of the fixing frame (10) is fixed with a J-shaped push rod (13) located at one end of the expansion cavity (2), and the center line of the bent end of the push rod (13) is located on the side wall of the expanded pipe.

5. The radial stretching device for PVC-O pipes according to claim 1, characterized in that: The drive structure (7) includes an outer plate (14), which is fixed in pairs on the outer side of the base plate (1). A drive motor (15) is installed on the outer plate (14), and a horizontal threaded rod (22) connected to the output end of the drive motor (15) is rotatably provided on the outer plate (14). The threaded rod (22) is threadedly connected to the push plate (6).

6. The radial stretching device for PVC-O pipes according to claim 1, characterized in that: The expansion cavity (2) is provided with a rotary heating structure (16); the rotary heating structure (16) includes a heating ring plate (17), the heating ring plate (17) is rotatably disposed in the expansion cavity (2), a plurality of heating plates (18) are evenly spaced on the inner wall of the heating ring plate (17), and annular teeth (20) are arranged on the outer surface of the end of the heating ring plate (17). A rotary motor (19) is provided at the bottom of the expansion cavity (2), and a gear (21) is fixed at the output end of the rotary motor (19). The gear (21) and the annular teeth (20) are meshed.

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