A continuous winding device for glass fiber reinforced plastic tubes

Abstract

This utility model discloses a continuous winding device for glass fiber reinforced plastic (GFRP) tubes, including a frame, a circumferential continuous fiber winding device and a chopped fiber winding device disposed on the frame; the circumferential continuous fiber winding device includes a circumferential fiber guiding device, which guides continuous fibers to be wound circumferentially on the surface of a mold; the chopped fiber winding device includes a chopped fiber cutting device, a guide trough inclinedly disposed at the bottom of the chopped fiber cutting device, a resin mixing device disposed on the frame, and a glue-coating trough disposed at the bottom of the resin mixing device, wherein the outlet of the resin mixing device is located above the glue-coating trough, and the guide trough and the glue-coating trough are located above the mold. The continuous winding device for GFRP tubes provided by this utility model can improve the axial and circumferential strength of GFRP tubes and increase production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of cable conduit manufacturing technology, specifically to a continuous winding device for glass fiber reinforced plastic pipes. Background Technology

[0002] Glass fiber reinforced plastic (GFRP) cable conduits are pipes made of GFRP materials used to protect telecommunications cables, communication cables, etc., typically with a diameter of 50-300mm. In the existing traditional continuous winding GFRP cable conduit manufacturing process, the axial fiber yarn is laid out using an axial fiber laying device. This device includes a turntable and a threading guide. Because the number of yarn spools that can be placed on the turntable is fixed, the number of axial yarns is limited, and the existing process cannot meet the increased axial strength requirements. Furthermore, during production, the rotation speed must be reduced when changing yarn spools. When yarn breakage or yarn tangling occurs, the machine must be stopped to resolve the issue, impacting production efficiency.

[0003] Therefore, the purpose of this utility model is to provide a continuous winding device for glass fiber reinforced plastic tubes to solve the above-mentioned technical problems. Utility Model Content

[0004] The purpose of this invention is to provide a continuous winding device for glass fiber reinforced plastic tubes, which can improve the axial and circumferential strength of glass fiber reinforced plastic tubes and increase production efficiency.

[0005] The technical solution of this utility model is as follows:

[0006] A continuous winding apparatus for glass fiber reinforced plastic tubes includes a frame, a circumferential continuous fiber winding device and a chopped fiber winding device disposed on the frame;

[0007] The circumferential continuous fiber winding device includes a circumferential fiber guiding device, which pulls the continuous fiber to perform circumferential winding on the mold surface;

[0008] The chopped fiber winding device includes a chopped fiber cutting device, a guide trough inclinedly disposed at the bottom of the chopped fiber cutting device, a resin mixing device disposed on the frame, and a glue coating trough disposed at the bottom of the resin mixing device. The outlet of the resin mixing device is located above the glue coating trough, and the guide trough and the glue coating trough are located above the mold.

[0009] Furthermore, the circumferential fiber guiding device includes several yarn guide tubes and a traction roller, and the continuous fibers are tensioned around the traction roller after passing through the yarn guide tubes.

[0010] Furthermore, the chopped fiber cutting device is a rotary roller fiber cutter.

[0011] Furthermore, the guide trough is an inclined plate with an inclination angle of 50-70°.

[0012] Furthermore, a metering pump is installed at the outlet of the resin mixing device.

[0013] Furthermore, the bottom of the glue-coating tank is provided with several glue-coating holes.

[0014] Furthermore, the frame is a height-adjustable structure.

[0015] Compared with the prior art, the continuous winding device for glass fiber reinforced plastic tubes provided by this utility model has the following advantages:

[0016] I. The continuous winding device for glass fiber reinforced plastic (GFRP) tubes provided by this utility model employs a circumferential continuous fiber winding device to perform circumferential winding on the mold surface. Short fibers generated by the chopped fiber winding device are scattered anisotropically on the mold surface, combining with the resin material dripping from the glue-coating tank and adhering to the mold surface. The combination of the circumferentially wound continuous fibers and the anisotropically distributed short fibers increases the axial and radial strength of the GFRP tube. GFRP cable conduits manufactured using the continuous winding device of this utility model exhibit an axial tensile strength of not less than 55 MPa and a circumferential bending strength of not less than 200 MPa.

[0017] II. The glass fiber reinforced plastic tube continuous winding device provided by this utility model does not use a rotating sand table to lay the fiber compared with the prior art. Therefore, there is no need to change the yarn ball, and the problems of yarn breakage and messy yarn are avoided. Continuous production can be achieved, and production efficiency is improved. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the continuous winding device for glass fiber reinforced plastic tubes according to this utility model. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solutions in the embodiments of this utility model, and to make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be further described below.

[0021] It should be noted that the descriptions of these embodiments are for the purpose of aiding understanding of the present invention, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0022] Please see Figure 1 This is a schematic diagram of the continuous winding device for glass fiber reinforced plastic tubes according to this utility model. The continuous winding device for glass fiber reinforced plastic tubes according to this utility model includes a frame 11, a circumferential continuous fiber winding device 12 and a chopped fiber winding device 13 disposed on the frame 11. The frame 11 is a height-adjustable structure, and the positions of the circumferential continuous fiber winding device 12 and the chopped fiber winding device 13 relative to the mold can be adjusted by adjusting its height.

[0023] In this invention, the mold can be a cantilever mold or a glass fiber reinforced plastic tube inner layer formed by continuous winding on the surface of a cantilever mold. In this embodiment, the already formed inner layer is used as the mold, and the outer layer structure is formed by winding glass fiber on the surface of the inner layer.

[0024] The circumferential continuous fiber winding device 12 includes a circumferential fiber guiding device 121. The impregnated continuous fibers are drawn by the circumferential fiber guiding device 121 and wound circumferentially along the inner layer 10. During the winding process, the inner layer is rotated and moved forward by the traction device. The circumferential fiber guiding device 121 includes several threading guides 122 and traction rollers 123. The continuous fibers 14 pass through the threading guides 122 and are tensioned by winding around the traction rollers 123. The resin material impregnating the continuous fibers is ordinary resin, and the outer layer is cured by heat curing.

[0025] The chopped fiber winding device 13 includes a chopped fiber cutting device 131, a guide trough 132 inclinedly disposed at the bottom of the chopped fiber cutting device 131, a resin mixing device 133 disposed on the frame 11, and a coating tank 134 disposed at the bottom of the resin mixing device. The outlet of the resin mixing device is located above the coating tank 134, and the guide trough 132 and the coating tank 134 are located above the mold. The chopped fiber cutting device is a rotary roller fiber cutter. Through the rotating cutter and pressure roller, long glass fibers are cut into chopped fibers of the required length. The chopped fibers 15 are distributed to the inner layer surface through the guide trough 132 at the bottom in an anisotropic distribution. The output of chopped fibers is controlled by adjusting the rotation speed of the cutter.

[0026] In this embodiment, the length of the chopped fibers is 3-20 mm, and the guide groove 132 is an inclined plate, through which the chopped fibers slide down to the inner layer surface. Preferably, the inclination angle is 50-70°.

[0027] The resin mixing device 133 is used for mixing and stirring the resin material. Its outlet is equipped with a metering pump (not shown), which controls the resin output according to the required amount per unit length of pipeline. The resin mixing device is essentially a mixing tank. The resin output from its outlet enters the coating tank 134, and then drips onto the surface of the inner layer 10 through coating holes (not shown) at the bottom of the coating tank, where it combines with the chopped fibers. Preferably, the coating holes are spaced apart along the axial direction of the inner layer, allowing the resin material dripping through the holes to be evenly distributed on the inner layer surface during rotation. Alternatively, an opening can be made at the bottom of the coating tank, allowing the resin material to drip onto the inner layer surface from the opening.

[0028] The glass fiber reinforced plastic tube continuous winding device of this embodiment produces a cable conduit with an axial tensile strength of not less than 55 MPa and a circumferential bending strength of not less than 200 MPa by continuously winding the outer layer of glass fiber on the inner surface.

[0029] The embodiments of this utility model have been described in detail above, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations made to these embodiments without departing from the principles and spirit of this utility model still fall within the protection scope of this utility model.

Claims

1. A continuous winding apparatus for a glass fiber reinforced plastic pipe, characterized by, It includes a frame, a circumferential continuous fiber winding device and a chopped fiber winding device disposed on the frame; The circumferential continuous fiber winding device includes a circumferential fiber guiding device, which pulls the continuous fiber to perform circumferential winding on the mold surface; The chopped fiber winding device includes a chopped fiber cutting device, a guide trough inclinedly disposed at the bottom of the chopped fiber cutting device, a resin mixing device disposed on the frame, and a glue coating trough disposed at the bottom of the resin mixing device. The outlet of the resin mixing device is located above the glue coating trough, and the guide trough and the glue coating trough are located above the mold.

2. The continuous winding device for glass fiber reinforced plastic tubes according to claim 1, characterized in that, The circumferential fiber guiding device includes several yarn guide tubes and a traction roller. After the continuous fibers pass through the yarn guide tubes, they are tensioned around the traction rollers.

3. The continuous winding device for glass fiber reinforced plastic tubes according to claim 1, characterized in that, The chopped fiber cutting device is a rotary roller fiber cutter.

4. The continuous winding device for glass fiber reinforced plastic tubes according to claim 1, characterized in that, The feed chute is an inclined plate with an inclination angle of 50-70°.

5. The continuous winding device for glass fiber reinforced plastic tubes according to claim 1, characterized in that, A metering pump is installed at the outlet of the resin mixing device.

6. The continuous winding device for glass fiber reinforced plastic tubes according to claim 1, characterized in that, The bottom of the glue-coating tank is provided with several glue-coating holes.

7. The continuous winding apparatus for glass fiber reinforced plastic tubes according to any one of claims 1-6, characterized in that, The frame is a liftable structure.

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