A stretching device for the production and processing of polyvinylidene fluoride (PVDF) pipes

Abstract

This utility model relates to the field of pipe manufacturing technology, specifically a stretching device for the production and processing of polyvinylidene fluoride (PVDF) pipes. Addressing the problem of pipe misalignment caused by uneven pressure distribution in existing traction devices, this device includes a base, symmetrically positioned crawler conveyors, and two side limiting plates. The limiting plates have multiple limiting holes through which the pipe passes and is clamped and pulled by the conveyor. The adjustment mechanism includes an inner plate, a rod, and a sliding plate, with a compression spring enabling angle locking and replacement of the limiting plates. The conveyor height is adjusted by a cylinder, and its surface is equipped with concave rubber blocks to increase friction. This solution prevents pipe misalignment through radial limiting, ensuring straightness and is suitable for the stretching processing of PVDF pipes, improving product quality. The shape of the limiting holes can be adapted to various pipe diameters, and adjustment is flexible and convenient.

Description

Technical Field

[0001] This utility model relates to the field of pipeline production technology, and in particular to a stretching device for the production and processing of polyvinylidene fluoride (PVDF) pipes. Background Technology

[0002] In the production and processing of polyvinylidene fluoride (PVDF) pipes, traction is a crucial step in pipe forming, conveying, and shaping. Common traction devices employ symmetrical crawler conveyors to clamp the pipes. However, this type of device has a limited contact area, and the pressure distribution may be uneven or insufficient. During traction, the pipe is prone to slight misalignment, affecting its straightness and ultimately reducing product quality. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies where slight deviations occur during traction due to uneven or insufficient pressure distribution, affecting the straightness of the pipes. Therefore, this invention proposes a stretching device for the production and processing of polyvinylidene fluoride (PVDF) pipes.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A stretching device for the production and processing of polyvinylidene fluoride (PVDF) pipes, comprising a base;

[0006] Two tracked conveyors are arranged symmetrically, one above the other. The lower tracked conveyor is fixedly connected to the top of the base, and multiple limit rods are fixedly installed on the top of the base. The upper tracked conveyor is slidably sleeved on the outer wall of the limit rods.

[0007] Two limiting plates are respectively located on both sides of the base. Multiple limiting holes are opened on the surface of the limiting plates. Side seats are fixed on both sides of the base, and the limiting plates are sleeved on one end of the side seats.

[0008] The adjustment mechanism includes a first inner cavity located in the side seat and an inner plate slidably located therein. A rod is fixedly provided on the top of the inner plate. Multiple slots are opened on the inner wall of the limiting plate. The rod cooperates with the slots to lock the angle of the limiting plate.

[0009] The pipe passes through the limiting hole and is clamped and pulled by the crawler conveyor. The limiting hole radially limits the pipe to prevent deviation caused by uneven friction and ensures straightness.

[0010] In one possible design, a compression spring is provided inside the first inner cavity. The two ends of the compression spring abut against the bottom end of the inner plate and the inner wall of the bottom of the first inner cavity through spring seats, respectively, to provide an elastic force for the inner plate to return to its original position.

[0011] In one possible design, a second inner cavity is formed inside the inner plate, and a slide plate is slidably arranged inside the second inner cavity. A limiting strip is fixed on one side of the slide plate, and one end of the limiting strip passes through the side seat and abuts against the surface of the limiting plate to limit the axial displacement of the limiting plate.

[0012] In one possible design, a second compression spring is provided inside the second inner cavity. The two ends of the second compression spring abut against the inner wall of one side of the second inner cavity and the side of the slide plate respectively through spring seats to provide elastic force for the slide plate to slide outward.

[0013] In one possible design, a sliding hole is provided on one side of the side seat, and a movable block is fixed on one side of the slide plate. One end of the movable block passes through the sliding hole and extends to the outside of the side seat, thereby limiting the position of the limiting plate by moving the movable block.

[0014] In one possible design, the base is equipped with a cylinder at the top, and the telescopic end of the cylinder is fixedly connected to the crawler conveyor above. The lifting height of the crawler conveyor above can be adjusted by the cylinder to accommodate various pipe diameters.

[0015] In one possible design, multiple rubber blocks are uniformly fixed on the surface of the tracked conveyor. The surface of the rubber blocks has a concave structure to increase the contact area and stabilize the clamping of the pipe.

[0016] In this application, during actual use, by sliding the moving block downwards, the moving block will move the inner plate downwards together, causing the insert rod at the top of the inner plate to disengage from the slot. This initially releases the fixed state of the limiting plate, allowing it to rotate for adjustment. After rotating the appropriate limiting hole upwards, the inner plate is reset by the No. 1 compression spring, causing the insert rod to re-insert into the slot and fix the limiting plate in place. When it is necessary to remove the limiting plate to replace it with a limiting hole of a different size, simply move the moving block downwards first, causing the insert rod to disengage from the slot, and then press the moving block inwards. The moving block will drive the slide plate to move inwards, causing the limiting strip on one side of the slide plate to retract into the side seat. At this point, the limiting plate can be released and replaced.

[0017] In this utility model, the stretching device for the production and processing of polyvinylidene fluoride pipes can be used in conjunction with the existing crawler conveyor traction through the limiting hole opened on the surface of the limiting plate. By limiting the pipe, its stability is ensured and phenomena such as deviation due to insufficient friction are avoided.

[0018] In this utility model, the stretching device for the production and processing of polyvinylidene fluoride pipes, through multiple limiting holes of the limiting plate and the detachable and replaceable limiting plate, can adapt to pipes of different diameters, which is highly flexible and convenient for practical use.

[0019] In this invention, when the existing tracked conveyor is used for traction, the upper limit hole of the limiting plate limits the position of the pipeline to ensure its stability during traction, avoid deviation caused by uneven or insufficient friction, prevent it from affecting its straightness, and ensure processing quality. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the main structure of a stretching device for the production and processing of polyvinylidene fluoride pipes proposed in this utility model.

[0021] Figure 2 This utility model Figure 1 Enlarged view of the structure of section A;

[0022] Figure 3 This is a side view cross-sectional structural diagram of a stretching device for the production and processing of polyvinylidene fluoride pipes proposed in this utility model.

[0023] Figure 4 This is a cross-sectional schematic diagram of a stretching device for the production and processing of polyvinylidene fluoride (PVDF) pipes proposed in this utility model.

[0024] In the diagram: 1. Base; 2. Tracked conveyor; 3. Rubber block; 4. Limiting rod; 5. Side seat; 6. Limiting plate; 7. Limiting hole; 8. Moving block; 9. Sliding hole; 10. Limiting strip; 11. No. 1 inner cavity; 12. No. 1 compression spring; 13. Inner plate; 14. Slot; 15. Insert rod; 16. No. 2 compression spring; 17. Slide plate; 18. No. 2 inner cavity. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0026] Example 1

[0027] Reference Figure 1-2 A traction device, comprising:

[0028] The base 1, as an overall support structure, has multiple limiting rods 4 fixedly installed on its top to guide the vertical sliding of the crawler conveyor 2 above.

[0029] Tracked conveyor 2, two tracked conveyors 2 are arranged symmetrically up and down, the lower tracked conveyor 2 is fixed to the top of the base 1, and the upper tracked conveyor 2 is slidably sleeved on the outer wall of the limiting rod 4 to achieve vertical lifting;

[0030] The limiting plate 6 and the side seat 5 are located on both sides of the base 1. Multiple sets of limiting holes 7 are opened on their surfaces. The different sizes of the limiting holes 7 correspond to different pipe diameters. The side seat 5 is fixed on both sides of the base 1. The limiting plate 6 is sleeved on one end of the side seat 5. An inner cavity 11 is opened inside the side seat 5.

[0031] Reference Figure 3-4 The self-locking adjustment mechanism has a first compression spring 12 and an inner plate 13 installed in the first inner cavity 11. The first compression spring 12 provides an upward elastic force to the inner plate 13 through the spring seat, so that the insert rod 15 at the top of the inner plate 13 is inserted into the slot 14 of the limiting plate 6, thereby locking the angle of the limiting plate 6.

[0032] The second inner cavity 18 is equipped with a second compression spring 16 and a sliding plate 17. The second compression spring 16 pushes the sliding plate 17 to slide horizontally, so that the end of the limiting strip 10 is inserted into one side of the limiting plate 6, so that it can only rotate in its original position.

[0033] Specifically, by sliding the moving block 8 downwards, the moving block 8 will move the inner plate 13 downwards together, so that the insert rod 15 at the top of the inner plate 13 is disengaged from the inside of the slot 14, thereby initially releasing the fixed state of the limiting plate 6, allowing it to rotate for adjustment. After rotating the appropriate limiting hole 7 upwards, the inner plate 13 is reset by the first compression spring 12, so that the insert rod 15 is reinserted into the inside of the slot 14, thus fixing the limiting plate 6.

[0034] When it is necessary to remove the limiting plate 6 to replace the limiting hole 7 of a different size, simply move the moving block 8 downwards first, so that the insert rod 15 is disengaged from the slot 14, and then press the moving block 8 inwards. The moving block 8 will drive the slide plate 17 to move inwards, so that the limiting strip 10 on one side of the slide plate 17 retracts into the side seat 5. At this time, the limiting plate 6 can be released and replaced.

[0035] Specifically, the pipe passes through the limiting hole 7 and enters between the two conveyors. At the same time, the upper and lower crawler conveyors 2 are turned on, and the speed of the two motors is adjusted to make the linear speed of the crawler consistent. In this way, the processed polyvinylidene fluoride pipe is pulled and transported by friction. The limiting holes 7 at the beginning and end can limit it to ensure the stability of its traction and prevent it from deviating, thereby ensuring its straightness.

[0036] This application can be used in the field of pipeline production, or in other fields applicable to this application.

[0037] Example 2

[0038] refer to Figure 1An improvement based on Example 1: A stretching device for the production and processing of polyvinylidene fluoride pipes, which is applied to the pipe production field, is provided with a cylinder at the top of the base 1. The telescopic end of the cylinder is fixedly connected to the crawler conveyor 2 above, so that the height can be adjusted to adapt to pipes of different sizes for traction and stretching. Since the cylinder can achieve arbitrary height adjustment, it has its own adaptability, while the limiting plate 6 can be adjusted by rotation or directly replaced to achieve adaptation to multiple sizes.

[0039] Multiple rubber blocks 3 are evenly fixed on the track surface. The surface of the rubber blocks 3 has a concave structure, which increases the contact area and friction to achieve stable clamping of the pipe.

[0040] However, as is well known to those skilled in the art, the working principle and wiring method of the tracked conveyor 2 are commonplace and are all conventional means or common knowledge, so they will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience.

[0041] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0042] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A stretching device for the production and processing of polyvinylidene fluoride (PVDF) pipes, characterized in that, include: Base (1); Two tracked conveyors (2) are arranged symmetrically above and below. The lower tracked conveyor (2) is fixedly connected to the top of the base (1). Multiple limiting rods (4) are fixedly provided on the top of the base (1). The upper tracked conveyor (2) is slidably sleeved on the outer wall of the limiting rods (4). Two limiting discs (6) are respectively located on both sides of the base (1). Multiple limiting holes (7) are opened on the surface of the limiting discs (6). Side seats (5) are fixed on both sides of the base (1). The limiting discs (6) are sleeved on one end of the side seats (5). The adjustment mechanism includes an inner cavity (11) located in the side seat (5) and an inner plate (13) slidably located therein. A rod (15) is fixedly provided on the top of the inner plate (13). Multiple slots (14) are opened on the inner wall of the limiting plate (6). The rod (15) cooperates with the slots (14) to lock the angle of the limiting plate (6). The pipe passes through the limiting hole (7) and is clamped and pulled by the crawler conveyor (2). The limiting hole (7) radially limits the pipe to avoid deviation due to uneven friction and ensure straightness.

2. The stretching device for producing and processing polyvinylidene fluoride (PVDF) pipes according to claim 1, characterized in that, The first inner cavity (11) is provided with a first compression spring (12). The two ends of the first compression spring (12) abut against the bottom end of the inner plate (13) and the bottom inner wall of the first inner cavity (11) respectively through spring seats, so as to provide the elastic force for the inner plate (13) to return to its upward position.

3. The stretching device for producing and processing polyvinylidene fluoride (PVDF) pipes according to claim 2, characterized in that, The inner plate (13) has a second inner cavity (18) inside, and a sliding plate (17) is slidably provided in the second inner cavity (18). A limiting strip (10) is fixedly provided on one side of the sliding plate (17). One end of the limiting strip (10) passes through the side seat (5) and abuts against the surface of the limiting plate (6) to limit the axial displacement of the limiting plate (6).

4. The stretching device for producing and processing polyvinylidene fluoride (PVDF) pipes according to claim 3, characterized in that, The second inner cavity (18) is provided with a second compression spring (16). The two ends of the second compression spring (16) abut against the inner wall of one side of the second inner cavity (18) and the side of the slide plate (17) respectively through spring seats, so as to provide elastic force for the slide plate (17) to slide outward.

5. The stretching device for producing and processing polyvinylidene fluoride (PVDF) pipes according to claim 4, characterized in that, The side seat (5) has a sliding hole (9) on one side, and a moving block (8) is fixed on one side of the sliding plate (17). One end of the moving block (8) passes through the sliding hole (9) and extends to the outside of the side seat (5). The moving block (8) limits the position of the limiting plate (6).

6. The stretching device for producing and processing polyvinylidene fluoride (PVDF) pipes according to claim 1, characterized in that, The base (1) is equipped with a cylinder at the top. The telescopic end of the cylinder is fixedly connected to the crawler conveyor (2) above. The lifting height of the crawler conveyor (2) above can be adjusted by the cylinder to adapt to various pipe diameters.

7. The stretching device for producing and processing polyvinylidene fluoride (PVDF) pipes according to claim 1, characterized in that, The surface of the tracked conveyor (2) is uniformly fixed with multiple rubber blocks (3), and the surface of the rubber blocks (3) is provided with a concave structure to increase the contact area and stabilize the clamping of the pipe.

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