Multi-layer composite pipeline production process

Abstract

The invention relates to the field of glass fiber pipes, in particular to a multi-layer composite pipeline production technology which comprises the steps that an inner weaving layer is machined on a core mold through a first weaving mechanism; processing a middle winding layer on the outer side of the inner woven layer through a winding mechanism; an outer weaving layer is machined on the outer side of the middle winding layer through a second weaving mechanism, and the glass fiber composite pipe is formed; a polyolefin pipe is processed on the outer side of a glass fiber composite pipe through an extrusion mechanism, an inner woven layer is woven on a core mold through a first weaving mechanism, a middle winding layer is wound on the outer side of the inner woven layer through a winding mechanism, then an outer woven layer is woven through a second weaving mechanism, and the glass fiber composite pipe is formed through the three-layer structure. And finally, a layer of polyolefin is extruded on the outer side of the glass fiber composite pipe through the extrusion mechanism, the polyolefin pipe is formed, the outer extrusion resistance and the inner extrusion resistance are effectively enhanced through the three layers of glass fibers, the extruded polyolefin is good in corrosion resistance and water resistance, the pipe performance is further enhanced, and leakage is prevented.

Description

Technical Field

[0001] The invention relates to the field of glass fiber pipes, and in particular to a production process of a multi-layer composite pipe. Background Art

[0002] Glass fiber composite pipe is a kind of pipe made by a specific composite process using glass fiber and its products as reinforcement materials; this kind of pipe usually uses glass fiber and its products as reinforcement materials, and uses non-metallic pipes with polymer components such as unsaturated polyester resin and epoxy resin as basic materials; glass fiber composite pipe not only combines the high strength, high temperature resistance and corrosion resistance of glass fiber, but also has good flexibility and designability.

[0003] In existing pipeline production, conventional materials cannot meet the requirements of pressure-resistant pipelines for resisting internal pressure. At the same time, there are microcracks inside, which leads to the risk of leakage when the water pressure is high. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, one of the purposes of the present invention is to provide a multi-layer composite pipe production process to solve the problem that the existing pipe production has low internal pressure resistance and the risk of leakage when the water pressure is high.

[0005] To achieve the above-mentioned purpose, the present invention provides a multi-layer composite pipe production process, including processing an inner braided layer on a core mold by a first braiding mechanism; processing an intermediate winding layer on the outside of the inner braided layer by a winding mechanism; processing an outer braided layer on the outside of the intermediate winding layer by a second braiding mechanism to form a glass fiber composite pipe; and processing a polyolefin pipe on the outside of the glass fiber composite pipe by an extrusion mechanism.

[0006] Principle of the technical solution: the core mold is used to determine the size, the first weaving mechanism weaves the inner braided layer on the core mold, the winding mechanism winds an intermediate winding layer on the outside of the inner braided layer, and then the second weaving mechanism weaves the outer braided layer on the basis of the intermediate winding layer. The three-layer structure forms a glass fiber composite tube, and finally a layer of polyolefin is extruded on the outside of the glass fiber composite tube through the extrusion mechanism to form a polyolefin tube, a total of four layers. The three layers of glass fiber effectively enhance the ability to resist external and internal extrusion. The extruded polyolefin has good corrosion resistance and water resistance, which further enhances the performance of the pipe and prevents leakage.

[0007] Compared with the prior art, the beneficial effects of the present invention are: 1. The winding layer is wrapped with two braided layers to improve the pressure bearing capacity inside and outside the pipeline.

[0008] 2. Add another layer of polyolefin outside the woven fiberglass tube to further improve the sealing performance and effectively prevent leakage.

[0009] As a preferred embodiment of the present invention, the thickness of the polyolefin tube is 2 to 10 mm.

[0010] Principle and beneficial effects: The thickness of the polyolefin tube is 2 to 10 mm, which can effectively improve the sealing performance while being economical.

[0011] As a preferred embodiment of the present invention, a resin tank is provided below the winding mechanism, and the glass fiber tape is soaked with resin before winding.

[0012] Purpose and beneficial effects: Resin is stored in the resin tank, and the resin adopts low shrinkage thermosetting resin, such as polyester resin, epoxy resin, polyurethane resin, etc. The resin is attached to the glass fiber tape, and fills the gaps between the glass fiber tapes during winding, and can also fill the gaps between the middle winding layer and the inner woven layer and the outer woven layer, and tightly combines the three after solidification; compared with the traditional setting of soaking first and then transporting to the winding mechanism for winding, the resin tank in the present invention is arranged below the winding mechanism, and the resin can be soaked in the glass fiber tape by the rotation of the winding mechanism itself, eliminating the soaking and transportation structure; and winding is started directly after soaking, which can reduce the dripping of resin during transportation, and the winding position is located above the resin tank, and the resin squeezed and dripped during winding directly falls into the resin tank, which can play a role in recycling and reducing waste.

[0013] As a preferred embodiment of the present invention, an inclined slide is arranged at the front end of the resin tank, a scraper is fixed at the end of the inclined slide, and the scraper is in an arc shape and is arranged around the bottom of the core mold.

[0014] Principle and beneficial effects: The scraper is used to scrape off the resin liquid suspended on the middle braided layer, and the inclined slide is used to receive the resin liquid dripping from the middle braided layer and reintroduce the collected resin liquid into the resin tank to achieve the purpose of recycling.

[0015] As a preferred embodiment of the present invention, the scraper is located on a side of the core mold close to the outer braided layer.

[0016] Principle and beneficial effects: The scraper is located on the side of the core mold close to the outer braided layer, which lengthens the distance between the core mold and the resin tank, and can reserve a length for the resin to slide down and drip from the middle winding layer, thereby maximizing the recovery of excess resin.

[0017] As a preferred embodiment of the present invention, the distance between the scraper and the core mold is between 2 and 5 glass fiber tape thicknesses.

[0018] Principle and beneficial effects: The distance between the scraper and the core mold is between 2 and 5 glass fiber tape thicknesses, which can avoid squeezing the middle winding layer and can scrape off the suspended dripping resin as much as possible.

[0019] As a preferred embodiment of the present invention, a support block is provided below the inclined slideway, and the support block is fixedly connected to the resin tank.

[0020] Principle and beneficial effects: Since the inclined slide extends the scraper to the side close to the outer braided layer, and the inclined slide is used to receive the resin and guide it into the resin tank, the inclined slide is subjected to greater pressure and there is a risk of breakage at the connection with the resin tank, which will affect the weaving. The provision of the support block can effectively improve the load-bearing capacity of the inclined slide.

[0021] As a preferred embodiment of the present invention, an adjustment plate is rotatably provided on the support block, the other end of the adjustment plate is fixedly connected to the inclined slide, the inclined slide is placed on the resin tank, and the adjustment plate and the support block are fixed by a fixing member.

[0022] Principle and beneficial effects: The adjustment plate is used to adjust the angle between the inclined slide and the resin tank, thereby controlling the distance between the scraper at the end of the inclined slide and the middle woven layer, and can be flexibly adjusted according to the thickness of the glass fiber tape. The adjustment plate and the support block are quickly fixed by the fixing piece, and the adjustment is simple and convenient.

[0023] As a preferred embodiment of the present invention, arc-shaped scraper rings are provided on both sides of the scraper, and the arc-shaped scraper rings are hinged on the scraper; the two arc-shaped scraper rings are fixed by connecting parts after rotating and contacting, and are combined with the scraper to form a complete circular ring; a brush is fixed on the inner side of the arc-shaped scraper ring.

[0024] Principle and beneficial effects: When the arc scraper rings are separated, the inclined slide does not contact the core mold, which makes it easy to adjust the angle and avoid interfering with the formation of the middle winding layer; when the arc scraper rings are connected and fixed by the connecting piece, the two arc scraper rings and the scraper are combined to form a complete circular ring, which is wrapped around the outside of the core mold. A brush is provided on the inside of the arc scraper ring to make the resin more evenly applied and to scrape off excess resin; and after the circular ring is formed, the inclined slide can be suspended on the core mold to share part of the gravity of the inclined slide and improve the ability to carry resin. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0026] Figure 1 The present invention is a flowchart of a multi-layer composite pipe production process embodiment.

[0027] Figure 2 It is a structural schematic diagram of an embodiment of a multi-layer composite pipe production process of the present invention.

[0028] Figure 3 This is an embodiment of a multi-layer composite pipe production process of the present invention. Figure 2 A partial enlargement of detail A.

[0029] Figure 4 It is a front view of an embodiment of a multi-layer composite pipe production process of the present invention.

[0030] Figure 5 This is an embodiment of a multi-layer composite pipe production process of the present invention. Figure 4 A partial enlargement of detail B.

[0031] The figure marks in the drawings of the specification include: 1 first weaving mechanism, 2 core mold, 3 inner weaving layer, 4 winding mechanism, 5 middle winding layer, 6 second weaving mechanism, 7 outer weaving layer, 8 extrusion mechanism, 9 polyolefin tube, 10 resin tank, 11 inclined slide, 12 scraper, 13 support block, 14 adjustment plate, 15 fixing part, 16 arc scraper ring, 17 connecting part, 18 brush. DETAILED DESCRIPTION

[0032] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0033] In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0035] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0036] As attached Figure 1 and attached Figure 3 As shown, the present invention provides a multi-layer composite pipe production process: comprising: processing an inner braided layer 3 on a core mold 2 by a first braiding mechanism 1; processing an intermediate winding layer 5 on the outer side of the inner braided layer 3 by a winding mechanism 4; processing an outer braided layer 7 on the outer side of the intermediate winding layer 5 by a second braiding mechanism 6 to form a glass fiber composite pipe; processing a polyolefin pipe 9 on the outer side of the glass fiber composite pipe by an extrusion mechanism 8; the thickness of the polyolefin pipe 9 is 2 to 10 mm; the core mold 2 is used to determine the size, the first braiding mechanism 1 braids the inner braided layer 3 on the core mold 2, the winding mechanism 4 winds a layer of intermediate winding layer 5 on the outer side of the inner braided layer 3, and then the second braiding mechanism 6 On the basis of the middle winding layer 5, the outer braided layer 7 is woven, and the three-layer structure forms a glass fiber composite tube. Finally, a layer of polyolefin is extruded on the outside of the glass fiber composite tube through the extrusion mechanism 8 to form a polyolefin tube 9; from the inside to the outside, there are four layers in total, namely the core mold 2, the inner braided layer 3, the middle winding layer 5, the outer braided layer 7 and the polyolefin tube 9. The three layers of glass fiber effectively enhance the ability to resist external and internal extrusion. The extruded polyolefin has good corrosion resistance and water resistance, which further enhances the performance of the pipe and prevents leakage; the thickness of the polyolefin tube 9 is within 1 to 3 mm, which can effectively improve the sealing performance while being economical.

[0037] As attached Figure 2 As shown, in this embodiment, from left to right, the first weaving mechanism 1, the second weaving mechanism 6 and the extrusion mechanism 8 are sequentially arranged on the core mold 2, the winding mechanism 4 is arranged on the inner side of the second weaving mechanism 6, and a resin tank 10 is arranged below the winding mechanism 4, in which resin is stored for soaking the glass fiber tape with resin before winding; compared with the traditional setting of soaking first and then transporting it to the winding mechanism 4 for winding, the resin tank 10 in the present invention is arranged below the winding mechanism 4, and the resin can be soaked in the glass fiber tape by the rotation of the winding mechanism 4 itself, eliminating the soaking and transportation structure; and winding is started directly after soaking, which can reduce the dripping of resin during transportation, and the winding position is located above the resin tank 10, and the resin squeezed and dripped during winding directly falls into the resin tank 10, which can play a role in recycling and reducing waste.

[0038] As attached Figure 4 and attached Figure 5As shown, in this embodiment, an inclined slide 11 is rotatably provided at the front end of the resin tank 10, and a scraper 12 is fixed at the end of the inclined slide 11. The scraper 12 is arc-shaped and is arranged around the bottom of the core mold 2. A support block 13 is arranged below the inclined slide 11, and the support block 13 is fixedly connected to the resin tank 10. An adjustment plate 14 is rotatably provided on the support block 13, and the other end of the adjustment plate 14 is fixedly connected to the inclined slide 11. The inclined slide 11 is placed on the resin tank 10, and the adjustment plate 14 and the support block 13 are fixed by a fixing member 15; the scraper 12 is located on the side of the core mold 2 close to the outer braided layer 7, and the distance between the scraper 12 and the core mold 2 is between 2 and 5 glass fiber tape thicknesses; the scraper 12 is used to scrape off the resin liquid suspended on the middle braided layer, and the inclined slide 11 is used to receive the resin liquid dripping from the middle woven layer and reintroduce the collected resin liquid into the resin tank 10 to achieve the purpose of recycling. The scraper 12 is located on the side of the core mold 2 close to the outer woven layer 7, and the distance between it and the resin tank 10 is lengthened, which can reserve a length for the resin to slide down and drip from the middle winding layer 5, thereby increasing the amount of recycled resin. The distance between the scraper 12 and the middle woven layer can be adjusted by the adjustment plate 14, so that the distance between the scraper 12 and the core mold 2 is between 2 and 5 glass fiber tape thicknesses, which can avoid squeezing the middle winding layer 5 and can scrape off the suspended dripping resin as much as possible; by setting the adjustable scraper 12 and the inclined slide 11, the resin that gradually drips from the middle woven layer due to gravity can be recovered, further reducing the waste of resin, improving the resin utilization rate, and saving costs.

[0039] As attached Figure 4 and attached Figure 5 As shown, in this embodiment, arc scraper rings 16 are provided on both sides of the scraper 12, and the arc scraper rings 16 are hinged on the scraper 12; the two arc scraper rings 161 are fixed by a connecting piece 17 after rotating and contacting, and are combined with the scraper 12 to form a complete ring; a brush 18 is fixed on the inner side of the arc scraper ring 16; in this embodiment, the connecting piece 17 adopts a bolt and nut structure, and when the arc scraper ring 16 is separated, the inclined slide 11 does not contact the core mold 2, which can facilitate the adjustment of the angle degree, and can also avoid interfering with the formation of the middle winding layer 5; when the arc scraper ring 16 is connected and fixed by the connecting piece 17, the two arc scraper rings 16 and the scraper 12 are combined to form a complete circular ring, which is wrapped around the outside of the core mold 2. A brush 18 is arranged on the inside of the arc scraper ring 16, which can make the resin smear more evenly and scrape off excess resin; and after the circular ring is formed, the inclined slide 11 can be suspended on the core mold 2, sharing part of the gravity of the inclined slide 11 and improving the ability to carry resin.

[0040] The preferred implementation modes of the present application are described in detail above in conjunction with the accompanying drawings. Typical known structures and common knowledge technologies in the preferred implementation modes are not described in detail here. Ordinary technicians in the relevant field can improve and implement the technical solutions of the present invention based on their own abilities under the inspiration given by the present implementation modes. Some typical known structures, known methods or common knowledge technologies should not become obstacles for ordinary technicians in the relevant field to implement the present application.

[0041] The scope of protection required by this application shall be based on the contents of its claims, and the contents recorded in the invention content, specific implementation methods and drawings of the specification shall be used to interpret the claims.

[0042] Within the technical concept of the present application, several modifications may be made to the specific implementation methods of the present application, and these modified specific implementation methods should also be regarded as within the protection scope of the present application.

Claims

1. A multi-layer composite pipe production process, characterized in that: The steps include: Processing an inner braided layer on a core mold by a first braiding mechanism; Processing the middle winding layer on the outside of the inner braided layer by a winding mechanism; The outer braided layer is processed on the outside of the middle winding layer by a second braiding mechanism to form a glass fiber composite tube; The polyolefin tube is processed on the outside of the glass fiber composite tube by an extrusion mechanism.

2. The multi-layer composite pipe production process according to claim 1, characterized in that: The thickness of the polyolefin tube is 2 to 10 mm.

3. The multi-layer composite pipe production process according to any one of claims 1 to 2, characterized in that: A resin tank is arranged below the winding mechanism, and the glass fiber tape is soaked with resin before winding.

4. The multi-layer composite pipe production process according to claim 3, characterized in that: An inclined slide is arranged at the front end of the resin tank, a scraper is fixed at the end of the inclined slide, and the scraper is in an arc shape and is arranged around the bottom of the core mold.

5. The multi-layer composite pipe production process according to claim 4, characterized in that: The scraper is located at one side of the core mold close to the outer braided layer.

6. The multi-layer composite pipe production process according to claim 5, characterized in that: The distance between the scraper and the core mold is between 2 and 5 glass fiber tape thicknesses.

7. The multi-layer composite pipe production process according to claim 6, characterized in that: A support block is arranged below the inclined slideway, and the support block is fixedly connected to the resin tank.

8. The multi-layer composite pipe production process according to claim 7, characterized in that: An adjustment plate is rotatably arranged on the support block, the other end of the adjustment plate is fixedly connected to the inclined slideway, the inclined slideway is placed on the resin tank, and the adjustment plate and the support block are fixed by a fixing member.

9. The multi-layer composite pipe production process according to claim 4, characterized in that: Arc scraper rings are arranged on both sides of the scraper, and the arc scraper rings are hinged on the scraper; the two arc scraper rings are fixed by connecting pieces after rotating and contacting, and are combined with the scraper to form a complete circular ring; a brush is fixed on the inner side of the arc scraper ring.

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