Glass fiber reinforced plastic pipe

Abstract

The utility model relates to the technical field of composite pipelines, and discloses a glass fiber reinforced plastic pipe, which comprises a core pipe, a glass fiber reinforced plastic pipe and a glass fiber reinforced plastic pipe, the glass fiber reinforcing layer is coated on the peripheral surface of the core tube, a reinforcing framework with a gap is embedded in the glass fiber reinforcing layer, and glass fiber reinforcing materials positioned on the inner side and the outer side of the reinforcing framework are combined into a whole through the gap; and the protective layer is coated on the peripheral surface of the glass fiber reinforced layer. According to the technical scheme, the reinforcing framework is embedded in the glass fiber reinforcing layer, and the reinforcing framework is provided with a plurality of gaps, so that the glass fiber reinforcing materials on the two sides of the reinforcing framework can penetrate through the gaps and are combined into a whole, and the structural stability and integrity of the glass fiber reinforcing layer are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of composite pipes, and particularly to a glass fiber reinforced plastic pipe. Background Art

[0002] With the development of plastic pipe technology, reinforced thermoplastic pipes (RTP) have been widely used in recent years in fields such as mining and ore dressing, oil and gas transmission and distribution, and municipal water supply. The reinforced thermoplastic pipe generally includes an inner pipe, a glass fiber reinforced layer coated on the inner pipe, and a protective layer coated on the glass fiber reinforced layer. The glass fiber reinforced layer plays a role in strengthening the pipe, and the protective layer plays a role in protecting the pipe. For existing reinforced thermoplastic pipes, especially for large-diameter pipes, such as pipes with a diameter greater than 315 mm, in order to ensure the pressure-bearing capacity of the pipe, a glass fiber reinforced layer with a relatively large thickness is usually provided. Although a glass fiber reinforced layer with a relatively large thickness can ensure the pressure-bearing capacity to a certain extent, it makes the glass fiber reinforced layer more brittle and loses the structural stability and integrity of the glass fiber reinforced layer. Summary of the Utility Model

[0003] The purpose of the utility model is to overcome the technical problem of poor structural stability and integrity of the reinforced layer existing in the prior art, and to provide a glass fiber reinforced plastic pipe with good structural stability and integrity.

[0004] To achieve the above purpose, the utility model provides a reinforced thermoplastic pipe, including: a core pipe; a glass fiber reinforced layer, the glass fiber reinforced layer is coated on the outer peripheral surface of the core pipe and is embedded with a reinforcing skeleton having voids, and the glass fiber reinforced materials on the inner and outer sides of the reinforcing skeleton are combined into one through the voids; and a protective layer coated on the outer peripheral surface of the glass fiber reinforced layer.

[0005] Through the above technical solution, a reinforcing skeleton is embedded in the glass fiber reinforced layer. The reinforcing skeleton has a plurality of voids, so that the glass fiber reinforced materials on both sides of the reinforcing skeleton can pass through the voids and be combined into one, thereby improving the structural stability and integrity of the glass fiber reinforced layer.

[0006] Optionally, a plurality of the reinforcing skeletons are embedded in the glass fiber reinforced layer, and the plurality of reinforcing skeletons are embedded at different radial positions in the glass fiber reinforced layer.

[0007] Optionally, the glass fiber reinforced layer includes a plurality of layers of glass fiber tapes that are successively laminated and wound and combined into one. The reinforcing skeleton includes a first reinforcing skeleton that is wound along a first spiral direction to the outer side of the radial inner glass fiber tape and forms a plurality of the voids.

[0008] Optionally, the reinforcing skeleton further includes a second reinforcing skeleton wound around the radial outer side of the first reinforcing skeleton along a second helical direction opposite to the first helical direction, and a plurality of the voids are formed.

[0009] Optionally, the reinforcing skeleton is a steel strip, a steel fiber strip or a steel cord strip with a single-layer thickness of 0.2-0.8 mm.

[0010] Optionally, the width of the reinforcing skeleton does not exceed 1 / 2 of the helix pitch of the helical winding of the reinforcing skeleton.

[0011] Optionally, the steel strip and at least one layer of the glass fiber strip are wound around the radial outer side of the previous layer of the glass fiber strip synchronously and alternately along the first helical direction and / or the second helical direction.

[0012] Optionally, the reinforcing skeleton is a steel mesh or a parallel strip, and the width of the steel mesh or the parallel strip is less than or equal to the helix pitch of its helical winding.

[0013] Optionally, plastic adhesives are provided on both sides of the reinforcing skeleton to integrate the reinforcing skeleton with the glass fiber reinforcing material of the glass fiber reinforcing layer. Description of the Drawings

[0014] Figure 1 is a three-dimensional structural schematic diagram of the glass fiber reinforced plastic pipe disclosed by the present utility model;

[0015] Figure 2 is Figure 1 a front view schematic diagram;

[0016] Figure 3 is a cross-sectional view of the glass fiber reinforced plastic pipe disclosed by the present utility model, where the reinforcing skeleton is located at the same radial position of the glass fiber reinforcing layer;

[0017] Figure 4 is a cross-sectional view of the glass fiber reinforced plastic pipe disclosed by the present utility model, where the reinforcing skeleton is located at different radial positions of the glass fiber reinforcing layer;

[0018] Figure 5 is a three-dimensional structural schematic diagram of an implementation manner of the reinforcing skeleton disclosed by the present utility model;

[0019] Figure 6 is Figure 5 a partial structural schematic diagram of the front view;

[0020] Figure 7 is a three-dimensional structural schematic diagram of another implementation manner of the reinforcing skeleton disclosed by the present utility model;

[0021] Figure 8 is Figure 7 a partial structural schematic diagram of the front view;

[0022] Figure 9 It is a schematic diagram of another implementation manner of the strengthening framework disclosed by the present utility model;

[0023] Figure 10 It is a schematic diagram of the strengthening framework being a parallel belt disclosed by the present utility model;

[0024] Figure 11 It is a schematic diagram of the strengthening framework being a steel fiber belt or a steel cord belt disclosed by the present utility model.

[0025] Explanation of reference numerals

[0026] 1 - core pipe; 2 - glass fiber reinforced layer; 3 - protective layer; 4 - strengthening framework; 41 - first strengthening framework; 42 - second strengthening framework; 5 - gap; 6 - glass fiber belt; 7 - parallel belt; 8 - steel belt; 9 - glue; 10 - steel fiber belt; 11 - steel wire. Specific implementation manners

[0027] The following will describe in detail the specific implementation manners of the present utility model with reference to the accompanying drawings. It should be understood that the specific implementation manners described herein are only for the purpose of illustration and explanation of the present utility model, and are not used to limit the present utility model.

[0028] In the present utility model, unless otherwise stated, the orientation or positional relationship indicated by terms such as "upper, lower, left, right, inner, outer, top, bottom" is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the present utility model.

[0029] In addition, terms such as "first" and "second" are only used for descriptive purposes, and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0030] In the present utility model, descriptions with reference to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0031] In the present utility model, unless otherwise clearly defined and limited, terms such as "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or communication with each other; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0032] In view of the technical problems that the structural stability and integrity of the glass fiber reinforced layer in the existing glass fiber reinforced plastic pipe are poor, especially as the thickness of the glass fiber reinforced layer increases, the glass fiber reinforced layer becomes more brittle, the present utility model provides a glass fiber reinforced plastic pipe.

[0033] Refer to 1 to Figure 11 As shown, the present utility model provides a glass fiber reinforced plastic pipe, including: a core pipe 1; a glass fiber reinforced layer 2 coated on the outer peripheral surface of the core pipe 1, and the glass fiber reinforced layer 2 is used to enhance the strength of the glass fiber reinforced plastic pipe. Further, a reinforcing skeleton 4 with voids 5 is embedded in the glass fiber reinforced layer 2, so that the glass fiber reinforced materials on the inner and outer sides of the reinforcing skeleton 4, such as the following glass fiber tapes, are combined into one body through the voids 5; In addition, the glass fiber reinforced plastic pipe provided by the present utility model further includes a protective layer 3 coated on the outer peripheral surface of the glass fiber reinforced layer 2, and the protective layer 3 is arranged on the outermost layer to play a role in protecting the glass fiber reinforced plastic pipe.

[0034] Through the above technical solution, the utility model provides a glass fiber reinforced plastic pipe different from the prior art. In the prior art, usually a steel mesh or a steel fiber belt is spirally wound around the outer peripheral surface of the core pipe, and then a glass fiber belt is wound around the outer peripheral surface of the steel mesh or the steel fiber belt to form a reinforcing layer. In the above reinforcing layer, the steel mesh or the steel fiber belt mainly plays the role of improving the pressure-bearing capacity of the pipe. However, in the utility model, the reinforcing skeleton 4 is embedded in the glass fiber reinforced layer 2, and the reinforcing skeleton 4 has voids 5, so that the glass fiber reinforced materials on both sides of the reinforcing skeleton 4, such as the glass fiber belts 6 inside and outside the reinforcing skeleton 4, can pass through the voids 5 and be combined into one body, for example, by bonding or welding, thereby improving the structural stability and integrity of the glass fiber reinforced layer. Therefore, in the utility model, the reinforcing skeleton 4 is embedded in the glass fiber reinforced layer 2, and its thickness is basically the same as that of a single-layer reinforcing material. Compared with the glass fiber reinforced layer 2, the volume of the reinforcing skeleton 4 itself is small, and its contribution to improving the pressure-bearing capacity of the pipe is small. Its main role is to improve the structural stability and integrity of the glass fiber reinforced layer 2, making the glass fiber reinforced layer 2 less brittle.

[0035] According to an embodiment of the glass fiber reinforced plastic pipe of the utility model, referring to Figure 3 as shown, a reinforcing skeleton 4 is embedded in the glass fiber reinforced layer 2. Optionally, as Figure 4 shown, a plurality of reinforcing skeletons 4 are embedded in the glass fiber reinforced layer 2, and the plurality of reinforcing skeletons 4 are embedded at different radial positions inside the glass fiber reinforced layer 2, thereby further improving the structural stability and integrity of the glass fiber reinforced layer 2.

[0036] Optionally, the glass fiber reinforced material includes a glass fiber belt 6, and the glass fiber belt 6 is a unidirectional belt formed by arranging and coating glue or plastic on multiple strands of glass fiber filaments. In an embodiment of the utility model, the thickness of the glass fiber belt is 0.2-0.5 mm. The glass fiber belt 6 is successively wound around the radial outer side of the core pipe 1 by a winding machine. In the multiple layers of glass fiber belts 6, a reinforcing skeleton 4 can be arranged at intervals of one layer or multiple layers, which can be specifically adjusted according to actual production requirements. As Figure 1 and Figure 2 shown, the glass fiber belt 6 can first be spirally wound around the radial outer side of the core pipe 1 to form a glass fiber belt layer, then the reinforcing skeleton 4 is arranged on the radial outer side of the glass fiber belt layer, and then the glass fiber belt 6 is continuously wound to form a new glass fiber belt layer; if it is necessary to arrange the reinforcing skeletons 4 at different radial positions of the glass fiber reinforced layer 2, the reinforcing skeletons 4 are continuously arranged on the radial outer side of the new glass fiber belt layer, and so on until the glass fiber reinforced layer 2 reaches the designed thickness.

[0037] Optionally, the reinforcing skeleton 4 of the utility model can be embedded in the glass fiber reinforced layer 2 in various ways. For example, combining Figure 5 and Figure 6As shown, the reinforcing skeleton 4 can be wound around the fiberglass tape layer at intervals in a single layer, forming a plurality of voids 5; further, as Figure 6 shown, fiberglass tapes 6 can be helically wound around the plurality of voids 5, such that in this layer, the reinforcing skeleton 5 and the fiberglass tapes 6 are in the same layer and are alternately wound around the fiberglass tape layer; or, referring to Figure 7 and Figure 8 shown, the reinforcing skeleton 4 includes a first reinforcing skeleton 41 and a second reinforcing skeleton 42. The first reinforcing skeleton 41 is wound around the fiberglass tape layer at intervals along a first helical direction, for example, along the left helical direction, and the second reinforcing skeleton 42 is wound around the radial outside of the first reinforcing skeleton 41 at intervals along a second helical direction opposite to the first helical direction, for example, along the right helical direction.

[0038] Specifically, referring to Figure 5 and Figure 6 shown, a winding machine is used to helically wind the fiberglass tape 6 around the radial outside of the core pipe 1 and cover the outer peripheral surface of the core pipe 1 to form a fiberglass tape layer. The reinforcing skeleton 4 includes a first reinforcing skeleton 41 that is wound around the radial outside of the fiberglass tape layer along the first helical direction and forms a plurality of voids 5. Combining Figure 6 shown, the first reinforcing skeleton 41 and the voids 5 are alternately formed on the radial outside of the fiberglass tape layer. The fiberglass tapes 6 on the inner and outer sides of the first reinforcing skeleton 41 are integrated through the voids 5. For example, the fiberglass tapes 6 on the inner and outer sides of the first reinforcing skeleton 41 are integrated through the voids 5 by using glue bonding or heat welding, thereby improving the structural stability and integrity of the fiberglass reinforced layer 2.

[0039] Further, referring to Figure 9 described, a winding machine is used to helically wind the fiberglass tape 6 around the radial outside of the core pipe 1 and cover the outer peripheral surface of the core pipe 1 to form a fiberglass tape layer. The reinforcing skeleton 4 is wound around the radial outside of the fiberglass tape layer at intervals along the first helical direction and / or the second helical direction and forms a plurality of voids 5. At the same time, the fiberglass tape 6 is helically wound within the voids 5. As Figure 9 described, the reinforcing skeleton 4 and the fiberglass tapes 6 are alternately wound on the radial outside of the fiberglass tape layer.

[0040] In addition, referring to Figure 7 and Figure 8 shown, a winding machine is used to helically wind the fiberglass tape 6 around the radial outside of the core pipe 1 and cover the outer peripheral surface of the core pipe 1 to form a fiberglass tape layer. The reinforcing skeleton 4 includes a first reinforcing skeleton 41 that is wound around the radial outside of the fiberglass tape layer at intervals along the first helical direction and a second reinforcing skeleton 42 that is wound around the radial outside of the first reinforcing skeleton 41 along the second helical direction opposite to the first helical direction and forms a plurality of voids 5. By helically winding the first reinforcing skeleton 41 and the second reinforcing skeleton 42 in two opposite directions on the radial outside of the fiberglass tape layer, the structural stability and integrity of the fiberglass reinforced layer 2 can be further improved.

[0041] Optionally, the reinforcing skeleton 4 can be a steel strip 8, a steel fiber strip 10, a steel cord belt, a steel mesh, a parallel belt 7, etc. To ensure the structural stability and integrity of the glass fiber reinforced layer 2, the single-layer thickness of the reinforcing skeleton 4 is 0.2-0.8 mm.

[0042] Specifically, the steel strip 8 can be a rectangular long strip. The thickness of the steel strip 8 is 0.2-0.8 mm, and the width of the steel strip 8 is less than or equal to 1 / 2 of the spiral pitch around which the steel strip 8 is spirally wound, so as to ensure that a sufficiently large gap 5 can be formed, enabling the glass fiber tapes 6 on both the inner and outer sides of the steel strip 8 to be integrated through the gap 5. Additionally, referring to Figure 11 As shown, the reinforcing skeleton 4 can be a steel fiber strip 10. The steel fiber strip 10 is a unidirectional strip formed by arranging and coating glue 9 or plastic on multiple fine steel wires. The diameter of the fine steel wires is less than 0.5 mm, and the width of the steel fiber strip 10 is less than or equal to 1 / 2 of the spiral pitch around which the steel fiber strip 10 is spirally wound, so as to ensure that a sufficiently large gap 5 can be formed. Similarly, the reinforcing skeleton 4 can be a steel cord belt. The steel cord belt is a unidirectional strip formed by arranging multiple steel cord wires and then coating glue or plastic. The steel cord is a steel wire rope formed by twisting multiple strands of wire, and the diameter of the steel wire rope is less than 2 mm. The width of the steel cord belt is less than or equal to 1 / 2 of the spiral pitch around which the steel cord belt is spirally wound, so as to ensure that a sufficiently large gap 5 can be formed.

[0043] According to another embodiment of the glass fiber reinforced plastic pipe of the present utility model, referring to Figure 10 As shown, the reinforcing skeleton 4 can be a parallel belt 7. The parallel belt 7 is a unidirectional strip formed by arranging multiple steel strips 8 at intervals and then coating glue 9 or plastic. The width of the parallel belt 7 is less than its spiral pitch around which it is spirally wound, so as to ensure that a gap 5 can be formed. Of course, since there are already gaps between the multiple steel strips 8 in the parallel belt 7, the width of the parallel belt 7 can be equal to its spiral pitch around which it is spirally wound, and still a gap 5 can be formed in this way. In addition, the reinforcing skeleton 4 can be a steel mesh. Since the steel mesh itself has holes, the width of the steel mesh can be less than or equal to its spiral pitch around which it is spirally wound.

[0044] Optionally, plastic connecting agents are provided on both sides of the reinforcing skeleton 4. The plastic connecting agents are used to integrate the reinforcing skeleton 4 with the glass fiber reinforcing material of the glass fiber reinforced layer 2, such as the glass fiber tape 6, to prevent the separation of the reinforcing skeleton 4 from the glass fiber tape 6 and further improve the structural stability and integrity of the glass fiber reinforced layer 2. The plastic connecting agent can be an adhesive to bond the reinforcing skeleton 4 to the glass fiber tapes 6 on both its inner and outer sides; or the plastic connecting agent can be plastic, which is arranged on both the inner and outer sides of the reinforcing skeleton 4, and by heating the reinforcing skeleton 4, the reinforcing skeleton 4 is fused to the glass fiber tapes 6 on both its inner and outer sides.

[0045] Optionally, the core tube 1 provided by the present utility model can be made of a single-layer material or co-extruded multi-layers. For example, the inner wall of the core tube 1 is extruded with a wear-resistant layer for contacting with the conveyed medium, thereby improving the service life of the core tube 1.

[0046] The preferred embodiments of the present utility model have been described in detail above in conjunction with the accompanying drawings. However, the present utility model is not limited thereto. Within the scope of the technical concept of the present utility model, various simple modifications can be made to the technical solution of the present utility model, including combinations of various specific technical features in any suitable manner. To avoid unnecessary repetition, the present utility model will not separately describe various possible combination methods. However, these simple modifications and combinations should also be regarded as the content disclosed by the present utility model and fall within the protection scope of the present utility model.

Claims

1. A glass fiber reinforced plastic tube, characterized in that: include: Core tube (1); A glass fiber reinforced layer (2), the glass fiber reinforced layer (2) being coated on the outer peripheral surface of the core tube (1) and having a reinforcing frame (4) with a gap (5) embedded therein, the glass fiber reinforced materials located on the inner and outer sides of the reinforcing frame (4) being integrated through the gap (5); and A protective layer (3), the protective layer (3) being coated on the outer peripheral surface of the glass fiber reinforced layer (2).

2. The glass fiber reinforced plastic tube according to claim 1, characterized in that: The glass fiber reinforced layer (2) has a plurality of reinforcing skeletons (4) embedded therein, and the plurality of reinforcing skeletons (4) are embedded at different radial positions within the glass fiber reinforced layer (2).

3. The glass fiber reinforced plastic tube according to claim 1, characterized in that: The glass fiber reinforced layer (2) comprises a plurality of glass fiber tapes (6) which are stacked, wound and combined into one, and the reinforcing skeleton (4) comprises a first reinforcing skeleton (41) which is wound along a first spiral direction to the radially outer side of the glass fiber tape (6) located radially inward thereof and forms a plurality of the voids (5).

4. The glass fiber reinforced plastic pipe according to claim 3, characterized in that: The reinforcing skeleton (4) further comprises a second reinforcing skeleton (42) which is wound along a second spiral direction opposite to the first spiral direction on the radially outer side of the first reinforcing skeleton (41) and forms a plurality of the gaps (5).

5. The glass fiber reinforced plastic tube according to claim 4, characterized in that: The reinforcing frame (4) is a steel belt, a steel fiber belt (10) or a steel curtain belt with a single layer thickness of 0.2-0.8 mm.

6. The glass fiber reinforced plastic pipe according to claim 5, characterized in that: The width of the reinforcing frame (4) does not exceed 1 / 2 of the helical lead of the helical winding of the reinforcing frame (4).

7. The glass fiber reinforced plastic tube according to claim 5, characterized in that: The steel belt and at least one layer of the glass fiber belt (6) are synchronously and alternately wound around the radial outer side of the previous layer of the glass fiber belt (6) along the first spiral direction and / or the second spiral direction.

8. The glass fiber reinforced plastic pipe according to claim 4, characterized in that: The reinforcing frame (4) is a steel mesh or a parallel belt (7), and the width of the steel mesh or the parallel belt (7) is less than or equal to the spiral lead of the spirally wound steel mesh or the parallel belt (7).

9. The glass fiber reinforced plastic tube according to claim 1, characterized in that: Plastic connecting agents are provided on both sides of the reinforcing frame (4) to integrate the reinforcing frame (4) with the glass fiber reinforced material of the glass fiber reinforced layer (2).

10. The glass fiber reinforced plastic pipe according to any one of claims 1 to 9, characterized in that: The inner side of the core tube (1) is provided with a wear-resistant layer.

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