Composite pipe comprising glass fiber reinforced plastic winding pipe fitting and machining technology of composite pipe

Abstract

The invention relates to a composite pipe comprising a glass fiber reinforced plastic winding pipe fitting and a machining process of the composite pipe. The composite pipe comprises a composite pipe body, the glass fiber reinforced plastic winding pipe fitting and a line pipe, and the glass fiber reinforced plastic winding pipe fitting is installed at one end of the line pipe; the composite pipe body is coaxially installed at the other end of the wire pipe, and one end of the composite pipe body is connected with the other end of the wire pipe through the connector assembly. The composite pipe has the beneficial effects that the structure is simple, the design is reasonable, and all metal pipe fittings used for overall connection of the composite pipe are replaced, so that the overall pipeline has the use effects of corrosion resistance and acid and alkali resistance; in addition, the composite pipe is simple in machining process, convenient to machine and high in efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of composite pipes, and in particular to a composite pipe comprising a glass fiber reinforced plastic wound pipe fitting and a processing technology thereof. Background Art

[0002] Thermoplastic lined fiberglass composite pipe is a composite pipe with polypropylene pipe as the inner lining layer and a reinforcement layer formed by winding continuous glass fiber and unsaturated resin as the structural layer. Steel joints are bonded at both ends of the composite pipe body, and the steel joints are used to terminate or connect adjacent pipes. The straight pipe section is all non-metallic pipelines, and the medium (such as crude oil, oily sewage, acid, alkali, etc.) is transported to achieve corrosion resistance, acid and alkali resistance and other use effects.

[0003] At present, the composite pipe fittings provided by thermoplastic lined fiberglass composite pipe (hereinafter referred to as composite pipe) manufacturers are all metal pipe fittings. After the composite pipe is put into operation, when the conveying medium is corrosive and has high pH, ​​the metal pipe fittings, as part of the overall pipeline operation, are still the weak points of corrosion resistance, which has an adverse impact on oilfield production and also affects the overall quality of the pipeline. Summary of the invention

[0004] The invention provides a composite pipe including a glass fiber reinforced plastic winding pipe fitting and a processing technology thereof, aiming to solve the problems in the prior art.

[0005] The technical solution of the present invention to solve the above technical problems is as follows:

[0006] A composite pipe including a fiberglass-reinforced plastic wound pipe fitting comprises a composite pipe body, a fiberglass-reinforced plastic wound pipe fitting and a wire pipe, wherein the fiberglass-reinforced plastic wound pipe fitting is installed at one end of the wire pipe; the composite pipe body is coaxially installed at the other end of the wire pipe, and one end of the composite pipe body is connected to the other end of the wire pipe through a joint assembly.

[0007] The beneficial effects of the present invention are as follows: the present invention has a simple structure and a reasonable design, and all metal pipe fittings used for the overall connection of the composite pipe are replaced to achieve the effect of corrosion resistance, acid and alkali resistance of the entire pipeline.

[0008] Based on the above technical solution, the present invention can also be improved as follows.

[0009] Furthermore, the joint assembly includes a joint, and the joint is sleeved outside one end of the composite pipe body and the other end of the wire pipe.

[0010] The beneficial effects of adopting the above further solution are simple structure, reasonable design, and easy assembly due to the connection of the wire pipe and the composite pipe body by the joint.

[0011] Furthermore, one end of the joint is threadedly connected to one end of the composite pipe body, and the other end is glued to the other end of the wire pipe.

[0012] The beneficial effect of adopting the above further solution is that the two ends of the joint are respectively threadedly connected to the composite pipe body and glued to the wire pipe, which is convenient for assembly.

[0013] Furthermore, the joint assembly also includes a sealing ring, which is located between one end of the composite pipe body and the other end of the wire pipe.

[0014] The beneficial effects of adopting the above further solution are simple structure and reasonable design. The sealing between the corresponding ends of the wire tube and the composite tube body can be increased by the sealing ring, and the sealing effect is better.

[0015] Furthermore, the joint is a steel pipe joint, and the sealing ring is a fluororubber sealing ring.

[0016] The beneficial effect of adopting the above further solution is that the materials of the joint and the sealing ring are reasonably selected to ensure the sealing performance.

[0017] Furthermore, the composite pipe body is a fiberglass composite pipe body, and the wire pipe is a glass fiber wire pipe.

[0018] The beneficial effect of adopting the above further solution is that the materials of each pipe body are reasonably selected, thereby ensuring the corrosion resistance of the entire composite pipe.

[0019] Furthermore, the fiberglass wrapped pipe fitting is a steel 90° elbow, a steel 45° elbow or a steel tee.

[0020] The beneficial effect of adopting the above further solution is that the fiberglass wrapped pipe has various shapes and can be applied to different working scenarios.

[0021] The present invention also relates to a processing technology of a composite pipe including a glass fiber reinforced plastic wound pipe fitting, comprising the following specific steps:

[0022] S1: Forming of FRP spiral pipe fittings;

[0023] S2: connection between the wire tube and the connection component;

[0024] S3: Assemble the composite pipe body, the fiberglass spiral pipe and the wire pipe together.

[0025] The beneficial effect of adopting the above further scheme is that the present invention also provides a processing technology for a composite pipe, which is simple, convenient to process, and efficient, and the composite pipe processed by this process has the characteristics of corrosion resistance and acid and alkali resistance; in addition, the processing technology of the composite pipe.

[0026] Further, the S1 comprises the following specific steps:

[0027] S11: Winding the glass fiber yarn, epoxy resin and fixing agent in the form of layers on a tube winding machine to form a semi-finished product;

[0028] S12: The semi-finished product is placed in a constant temperature box at a temperature of 180-200° C. for curing and then demoulding.

[0029] The beneficial effect of adopting the above further solution is that the process is simple and rapid prototyping of FRP winding pipe fittings can be achieved.

[0030] Furthermore, the S1 specifically includes: gluing the wire tube to the connecting assembly.

[0031] The beneficial effect of adopting the above further solution is that the wire tube and the connecting component are easy to assemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is an overall assembly diagram of the glass fiber reinforced plastic winding pipe fitting of the present invention when it is a 45° elbow;

[0033] Figure 2 This is a schematic diagram of the structure of the glass fiber reinforced plastic winding pipe fitting in the present invention when it is a 45° elbow;

[0034] Figure 3 This is an overall assembly diagram of the glass fiber reinforced plastic winding pipe fitting of the present invention when it is a 90° elbow;

[0035] Figure 4 This is a schematic diagram of the structure of the glass fiber reinforced plastic winding pipe fitting in the present invention when it is a 90° elbow;

[0036] Figure 5 This is an overall assembly diagram when the glass fiber reinforced plastic winding pipe fitting in the present invention is a tee;

[0037] Figure 6 It is a schematic structural diagram of the glass fiber reinforced plastic winding pipe fitting in the present invention when it is a tee.

[0038] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0039] 1. Composite pipe body; 2. FRP winding pipe fittings; 3. Wire pipe; 4. Joint; 5. Sealing ring. DETAILED DESCRIPTION

[0040] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0041] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0042] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0043] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0044] Example 1

[0045] like Figures 1 to 6 As shown, this embodiment provides a composite pipe including a FRP wound pipe fitting, including a composite pipe body 1, a FRP wound pipe fitting 2 and a wire pipe 3, wherein the FRP wound pipe fitting 2 is installed at one end of the wire pipe 3; the composite pipe body 1 is coaxially installed at the other end of the wire pipe 3, and one end thereof is connected to the other end of the wire pipe 3 through a joint assembly.

[0046] Preferably, in this embodiment, the composite pipe body 1 and the wire pipe 3 both adopt a straight pipe structure.

[0047] This embodiment has a simple structure and a reasonable design. All metal pipe fittings used for the overall connection of the composite pipe are replaced to achieve the effect of corrosion resistance, acid and alkali resistance of the entire pipeline.

[0048] Example 2

[0049] On the basis of Example 1, in this embodiment, the joint assembly includes a joint 4, and the joint 4 is sleeved outside one end of the composite pipe body 1 and the other end of the wire pipe 3.

[0050] This solution has a simple structure and a reasonable design. The wire tube 3 and the composite tube body 1 are connected by a joint, and the assembly is convenient.

[0051] Example 3

[0052] On the basis of Example 2, in this embodiment, one end of the joint 4 is threadedly connected to one end of the composite pipe body 1 , and the other end is glued to the other end of the wire tube 3 .

[0053] Both ends of the joint 4 are respectively threadedly connected to the composite pipe body 1 and glued to the wire pipe 3, so that the assembly is convenient.

[0054] Example 4

[0055] On the basis of any one of Examples 2 to 3, in this embodiment, the joint assembly further includes a sealing ring 5 , and the sealing ring 5 is located between one end of the composite pipe body 1 and the other end of the wire pipe 3 .

[0056] This solution has a simple structure and a reasonable design. The sealing ring 5 can increase the sealing between the corresponding ends of the wire tube 3 and the composite tube body 1, and the sealing effect is better.

[0057] Example 5

[0058] On the basis of Example 4, in this embodiment, the joint 4 is a steel pipe joint, and the sealing ring 5 is a fluororubber sealing ring.

[0059] The materials of the joint 4 and the sealing ring 5 are reasonably selected to ensure the sealing performance.

[0060] Example 6

[0061] On the basis of the above embodiments, in this embodiment, the composite pipe body 1 is a fiberglass composite pipe body, and the wire pipe 3 is a glass fiber wire pipe.

[0062] The materials of each pipe body are reasonably selected to ensure the corrosion resistance of the entire composite pipe.

[0063] Example 7

[0064] On the basis of the above embodiments, in this embodiment, the fiberglass wrapped pipe fitting 2 is a steel 90° elbow or a steel 45° elbow or a steel tee.

[0065] The fiberglass wrapped pipe fittings 2 have various shapes and can be applied to different working scenarios.

[0066] Example 8

[0067] On the basis of the above embodiments, this embodiment further provides a processing technology of a composite pipe including a fiberglass-reinforced plastic wound pipe fitting, comprising the following specific steps:

[0068] S1: Forming of FRP winding pipe fitting 2;

[0069] S2: connection between the wire tube 3 and the connection assembly;

[0070] S3: Assemble the composite pipe body 1, the FRP winding pipe 2 and the wire pipe 3 together.

[0071] This embodiment also provides a composite pipe processing technology, which is simple, convenient to process, and highly efficient. The composite pipe processed by this process has the characteristics of corrosion resistance and acid and alkali resistance. In addition, the composite pipe processing technology.

[0072] Example 9

[0073] On the basis of Example 8, in this embodiment, S1 includes the following specific steps:

[0074] S11: Winding the glass fiber yarn, epoxy resin and fixing agent in the form of layers on a tube winding machine to form a semi-finished product;

[0075] S12: The semi-finished product is placed in a constant temperature box at a temperature of 180-200° C. for curing and then demoulding.

[0076] This solution has a simple process and can realize the rapid prototyping of the FRP winding pipe 2.

[0077] Preferably, in this embodiment, in the above S11, the glass fiber yarn, epoxy resin and fixing agent are wound on a pipe winding machine in the form of layers (for example, 20 layers or 40 layers, etc., the specific number of layers is designed according to demand) to form a semi-finished product.

[0078] In addition, the curing agent is preferably an amine curing agent, such as EC201 type.

[0079] Furthermore, in the above S12, the semi-finished product is placed in a constant temperature box at a temperature of 190°C for curing for 10 minutes and then demolded.

[0080] Example 10

[0081] On the basis of any one of Embodiments 8 to 9, in this embodiment, S1 specifically includes: gluing the wire tube 3 to the connection assembly.

[0082] The wire tube 3 and the connecting assembly are easy to assemble, that is, the corresponding end of the wire tube 3 and the corresponding end of the connector 4 are glued together.

[0083] The processing technology of the composite pipe provided by the present invention is as follows:

[0084] The glass fiber yarn, epoxy resin and fixing agent are wound in the form of layers on a tube winding machine to form a semi-finished product;

[0085] The semi-finished product is placed in a thermostatic box at a temperature of 180-200°C for curing and then demoulding;

[0086] Glue the corresponding end of the wire tube 3 and the corresponding end of the connector 4 together;

[0087] The composite pipe body 1, the FRP winding pipe fitting 2 and the wire pipe 3 are assembled.

[0088] The advantages of the present invention are:

[0089] 1. The key point of the present invention is how to bond the high-pressure glass fiber pipeline to the metal pipe joint, and the bonding strength can meet the short-term failure pressure and withstand 3 times or more of the nominal pressure, so the adhesive bonding strength requirement is relatively high.

[0090] 2. Drawing work of metal pipe joints: The high-pressure glass fiber pipeline pipe that acts as a conversion tube needs to keep the same specification pressure and inner and outer diameter dimensions as the composite pipe. It is necessary to make corresponding adjustments to the drawing of the metal pipe joints so that it can be bonded to the metal joints and threaded with the glass fiber reinforced plastic pipe fittings.

[0091] 3. The winding process of FRP pipe fittings is to design the wall thickness of the pipe fittings according to the specification pressure and determine the appropriate winding outer diameter size to meet the pressure level of the composite pipe.

[0092] The present invention provides a composite pipe that uses epoxy fiberglass wrapped pipe fittings to replace metal pipe fittings, which fundamentally replaces metal pipe fittings. The present invention is suitable for improving the overall corrosion resistance of the composite pipe pipeline and making up for the shortcomings of the corrosion resistance of the overall pipeline installation.

[0093] In addition, based on the current application of metal pipe fittings and the market's requirements for pipeline corrosion resistance, the process provided by the invention is suitable for improving the overall corrosion resistance of composite pipe pipelines, making up for the shortcomings of overall pipeline corrosion resistance, and fundamentally solving the problem of metal's corrosion resistance. It is more advantageous than the original ones in terms of economic effect and use.

[0094] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0095] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0096] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A composite pipe comprising a fiberglass wound pipe fitting, Features: The invention comprises a composite pipe body (1), a glass fiber reinforced plastic winding pipe fitting (2) and a wire pipe (3), wherein the glass fiber reinforced plastic winding pipe fitting (2) is installed at one end of the wire pipe (3); the composite pipe body (1) is coaxially installed at the other end of the wire pipe (3), and one end of the composite pipe body (1) is connected to the other end of the wire pipe (3) via a joint assembly.

2. The composite pipe comprising a fiberglass-reinforced plastic wound pipe fitting according to claim 1, Features: The joint assembly comprises a joint (4), and the joint (4) is sleeved outside one end of the composite pipe body (1) and the other end of the wire pipe (3).

3. The composite pipe comprising a fiberglass wound pipe according to claim 2, Features: One end of the joint (4) is threadedly connected to one end of the composite pipe body (1), and the other end is glued to the other end of the wire pipe (3).

4. The composite pipe comprising a fiberglass wound pipe according to claim 2, Features: The joint assembly further comprises a sealing ring (5), wherein the sealing ring (5) is located between one end of the composite pipe body (1) and the other end of the wire pipe (3).

5. The composite pipe comprising a fiberglass-reinforced plastic wound pipe fitting according to claim 4, Features: The joint (4) is a steel pipe joint, and the sealing ring (5) is a fluororubber sealing ring.

6. The composite pipe comprising a fiberglass-reinforced plastic wound pipe fitting according to any one of claims 1 to 5, Features: The composite pipe body (1) is a glass fiber reinforced plastic composite pipe body, and the wire pipe (3) is a glass fiber wire pipe.

7. The composite pipe comprising a fiberglass-reinforced plastic wound pipe fitting according to any one of claims 1 to 5, Features: The glass fiber reinforced plastic winding pipe fitting (2) is a steel 90° elbow or a steel 45° elbow or a steel tee.

8. A process for processing a composite pipe comprising a fiberglass-reinforced plastic winding pipe fitting, It is characterized in that The specific steps include: S1: Forming of the glass fiber reinforced plastic winding pipe (2); S2: connection between the wire tube (3) and the connection assembly; S3: Assembling the composite pipe body (1), the fiberglass reinforced plastic winding pipe (2) and the wire pipe (3) together.

9. The process for processing a composite pipe comprising a fiberglass-reinforced plastic wound pipe fitting according to claim 8, It is characterized in that The S1 comprises the following specific steps: S11: Winding the glass fiber yarn, epoxy resin and fixing agent in the form of layers on a tube winding machine to form a semi-finished product; S12: The semi-finished product is placed in a constant temperature box at a temperature of 180-200° C. for curing and then demoulding.

10. The process for processing a composite pipe comprising a fiberglass-reinforced plastic wound pipe fitting according to claim 8, It is characterized in that The S1 specifically comprises: gluing the wire tube (3) to the connection assembly.

Images