Basalt fiber metal composite pipe

Abstract

The utility model discloses a basalt fiber metal composite pipe which comprises a foundation pipe, connecting sections are arranged at the two ends of the foundation pipe, connecting grooves matched with couplings are formed in the positions, close to the ends, of the two connecting sections respectively, and the basalt fiber metal composite pipe further comprises a basalt fiber layer which is arranged on the periphery of the foundation pipe and covers the outer side of the foundation pipe except the connecting grooves. A protruding ring is arranged on the end face of one connecting section of the basic pipe, and an annular groove matched with the protruding ring is formed in the end face of the other connecting section of the basic pipe. The outer side face of the convex ring is obliquely arranged, and a flexible layer is arranged on the convex ring so that a sealing layer can be formed after the convex ring and the ring groove are pressed tightly. According to the basalt fiber metal composite pipe provided by the utility model, the basalt fiber layer covers the outer side of the foundation pipe except the connecting groove, so that the connecting and combining area of the basalt fiber layer and the foundation pipe is increased, and meanwhile, the contact between the foundation pipe and the external environment is blocked; and the sealing layer is arranged between the adjacent composite pipes, so that the sealing effect of the pipeline joint is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of petroleum and natural gas, and more specifically, to a basalt fiber metal composite pipe. Background Art

[0002] Traditional oil pipes are generally made of steel, which has a large unit length mass and high cost. During the underground transportation process, the oil pipe may come into contact with a large amount of corrosive substances, causing the oil pipe to corrode, resulting in perforation, disengagement, and breakage of the oil pipe body, resulting in a reduced oil pipe life, frequent replacement, and reduced oil production efficiency. In general, the corrosion protection of steel pipes can be achieved by adding alloy elements to the steel according to the medium being transported, and using production processes such as heat treatment to make it resistant to the corrosive substances of the transported medium. However, the environment faced by the outside of the oil pipe is more complex, and has different corrosion protection requirements from the inner wall of the oil pipe.

[0003] The utility model patent with patent announcement number CN215410604U discloses an integral fiber metal composite pipe and composite oil pipe, which relates to the field of petroleum and natural gas. It solves the problem of fatigue fracture at the weld of existing composite pipes. The technical solution adopted is: an integral fiber metal composite pipe, including a base pipe made of metal, the base pipe forms a cylindrical tube cavity, the two ends of the base pipe are connecting sections, and connecting grooves are respectively arranged near the end of the connecting section; there is an intermediate section between the two connecting sections, the outer diameter of the intermediate section is smaller than the outer diameter of the connecting section, and the intermediate section and the connecting section are connected by an inclined surface.

[0004] Although the utility model enhances the bonding force between the basalt fiber layer and the base pipe by providing an annular groove, the bonding surface between the two is small and the bonding force is very limited, which cannot ensure that the structure of the bonding remains unchanged after long-term use. The basalt fiber layer is not provided on the outside of the connecting section, which will cause the base pipe to directly contact the external environment. The base pipe needs to be designed for both the transport medium and the corrosive substances in the external environment to meet the anti-corrosion requirements. The material requirements and manufacturing process requirements for the base pipe are higher, and the production cost will be greatly increased. The end of the connecting section cannot guarantee good sealing after connection, and the transported medium is prone to leak and contact with the coupling and corrode it. Utility Model Content

[0005] An object of the present invention is to solve the above-mentioned problems and / or disadvantages and to provide advantages which will be described below.

[0006] In order to achieve these purposes and other advantages of the utility model, a basalt fiber metal composite pipe is provided, comprising: a base pipe, the two ends of the base pipe are connecting sections, the middle section is between the two connecting sections, and the outer diameter of the middle section is smaller than the outer diameter of the connecting section, the middle section and the connecting section are transitioned by an inclined surface, and the two connecting sections are respectively provided with connecting grooves matched with couplings near the ends, and also comprising: a basalt fiber layer arranged on the outer periphery of the base pipe and covering the outer side of the base pipe except for the connecting groove;

[0007] The end surface of one connecting section of the base pipe is provided with a convex ring, and the end surface of the other connecting section is provided with a ring groove adapted to the convex ring;

[0008] The inner side surface of the convex ring is flush with the inner wall of the base pipe;

[0009] The outer side surface of the convex ring is inclined, and a flexible layer is arranged on it to form a sealing layer after being pressed against the ring groove.

[0010] Preferably, the outer wall of the base pipe is configured as a rough surface at the contact point with the basalt fiber layer.

[0011] Preferably, a section of the connecting section where no connecting groove is provided is a connecting section;

[0012] Annular grooves are arranged at intervals between the inclined surface and the surface of the connecting section.

[0013] Preferably, outer surfaces of the basalt fiber layers covering the middle section and the connecting section are flush.

[0014] The utility model includes at least the following beneficial effects: the basalt fiber layer covers the outside of the base pipe except the connection groove, which increases the area of ​​the connection and combination of the two, effectively increases the bonding force of the two, and ensures that the structure of the joint remains unchanged after long-term use. At the same time, it blocks the contact between the base pipe and the external environment to prevent the base pipe from being corroded by the external environment. The corrosion resistance requirements for the base pipe can be set only for the conveying medium, reducing the material requirements and manufacturing process requirements for the base pipe, and effectively reducing the production cost. The convex rings and annular grooves between adjacent composite pipes can help them to quickly adjust to the end face alignment when connecting, and form a sealing layer after connection to prevent leakage of the transported medium and increase the sealing effect of the pipeline connection.

[0015] Other advantages, objectives and features of the present invention will be reflected in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A cross-sectional view of a basalt fiber metal composite tube in one embodiment of the utility model;

[0017] Figure 2This is a schematic diagram of the structure of a basalt fiber metal composite tube in one embodiment of the utility model;

[0018] Figure 3 It is a cross-sectional view of a basalt fiber metal composite pipe connection section in one embodiment of the utility model;

[0019] Figure 4 It is a cross-sectional view of a basalt fiber metal composite tube convex ring in one embodiment of the utility model.

[0020] Markings in the figure: 1. base pipe, 11. connecting section, 111. connecting groove, 112. connecting section, 113. convex ring, 114. sealing layer, 115. ring groove, 12. middle section, 13. inclined surface, 14. groove, 2. basalt fiber layer, 3. coupling. DETAILED DESCRIPTION

[0021] The present invention will be further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0022] It should be understood that terms such as “having”, “including” and “comprising” used herein do not recite the existence or addition of one or more other elements or combinations thereof.

[0023] It should be noted that in the description of the present invention, the orientation or position relationship indicated by the term is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply 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 a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present utility model, unless otherwise clearly stipulated and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connection" 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 an indirect connection through an intermediate medium. It can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.

[0025] In addition, in the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0026] Example 1

[0027] A basalt fiber metal composite tube, the structure of which is as follows Figure 1-4 As shown, it includes: a base pipe 1, both ends of the base pipe 1 are connecting sections 11, an intermediate section 12 is between the two connecting sections 11, and the outer diameter of the intermediate section 12 is smaller than the outer diameter of the connecting section 11, and a transition is made between the intermediate section 12 and the connecting section 11 through an inclined surface 13, and the two connecting sections 11 are respectively provided with connecting grooves 111 matched with the coupling 3 near the ends, and also includes: a basalt fiber layer 2 arranged on the outer periphery of the base pipe 1 and covering the outer side of the base pipe 1 except for the connecting grooves 111;

[0028] The end surface of one connecting section 11 of the base pipe 1 is provided with a convex ring 113, and the end surface of the other connecting section 11 is provided with an annular groove 115 adapted to the convex ring 113;

[0029] The inner side surface of the convex ring 113 is flush with the inner wall of the base pipe 1;

[0030] The outer side surface of the convex ring 113 is inclined, and a flexible layer is provided thereon to form a sealing layer 114 after being pressed against the annular groove 115 .

[0031] In actual application, the cross section of the convex ring 113 is a right-angled trapezoid, the side away from the connecting section 11 is parallel to the end face, and its length is less than the length of the side close to the connecting section 11; the connecting groove 111 is a threaded buckle, and the coupling 3 connects two adjacent connecting sections 11 respectively and covers the outer surface of the connecting groove 111 to prevent the connecting groove 111 from being directly in contact with the external environment and being corroded; the base pipe 1 is made of metal, and the connecting grooves 111 at both ends of the base pipe 1 are an integral structure with the base pipe 1, not welded, and have high tensile strength and are not prone to fatigue fracture; basalt fibers are alternately wound around the outside of the base pipe 1 except the connecting grooves 111 to form a basalt fiber layer 2, which saves the material of the base pipe 1 and reduces the mass of the base pipe 1 per unit length. In addition, basalt fibers have the characteristics of low cost, good flexibility and good corrosion resistance. They can effectively prevent external environmental corrosion on the outside of the base pipe 1. When the base pipe 1 is made of corrosion-resistant metal material for the conveying medium, the base pipe 1 is protected.

[0032] Working principle: When connecting, align the convex ring 113 and the annular groove 115 of two adjacent composite pipes, apply force in opposite directions to bring the two together, and use the coupling 3 to tightly connect the two, so that the adjacent composite pipes are tightly connected. The basalt fiber layer 2 covers the outside of the base pipe 1 except the connection groove 111, which increases the area of ​​the connection and combination between the two, effectively increases the bonding force between the two, and ensures that the structure of the joint remains unchanged after long-term use. At the same time, it blocks the contact between the base pipe 1 and the external environment to prevent the base pipe 1 from being corroded by the external environment. The corrosion resistance requirements for the base pipe 1 can be set only for the conveying medium, reducing the material requirements and manufacturing process requirements of the base pipe 1, and effectively reducing the production cost. The convex ring 113 and the annular groove 115 between the adjacent composite pipes can help them to quickly adjust to the end face alignment when connecting, and form a sealing layer 114 after the connection to prevent the leakage of the transported medium and increase the sealing effect of the pipeline connection.

[0033] Example 2

[0034] Embodiment 2 is a preferred embodiment of the present invention, which discloses the following improvements based on embodiment 1: the contact portion between the outer wall of the base pipe 1 and the basalt fiber layer 2 is configured as a rough surface.

[0035] In practical applications, the inner wall of the base pipe 1 is smooth, which is beneficial to the transportation of the internal medium and prevents internal corrosion.

[0036] Working principle: The rough surface is provided to facilitate the basalt fiber layer 2 and the base pipe 1 to be firmly joined as a whole.

[0037] Example 3

[0038] This embodiment 3 is a preferred embodiment of the present utility model, and the specific structure is as follows Figure 1 , Figure 3 , Figure 4 As shown, it discloses the following improvement based on the embodiment 1: a section of the connecting section 11 that is not provided with the connecting groove 111 is a connecting section 112;

[0039] Annular grooves 14 are provided between the inclined surface 13 and the surface of the connecting section 112 .

[0040] Working principle: The annular grooves 14 arranged at intervals can effectively increase the area of ​​the basalt fiber layer 2 and the base pipe 1, and make the two ends of the basalt fiber layer 2 interlock with the base pipe 1, which effectively increases the bonding force between the two and makes the two connected more tightly.

[0041] Example 4

[0042] This embodiment 4 is a preferred embodiment of the present utility model, and its specific structure is as follows Figure 1 , Figure 3 As shown, it discloses the following improvement based on the first embodiment: the outer surface of the basalt fiber layer 2 covering the middle section 12 and the connecting section 11 is flush.

[0043] Working principle: After covering the middle section 12 and the connecting section 11, the surface of the basalt fiber layer 2 is flush, which can ensure the consistency of the outer diameter of the manufactured pipe fittings, and at the same time avoid the bending stress caused by the concave and convex connection during use of the pipeline and the stress concentration at the connection, which affects the service life of the composite pipe.

[0044] The above solutions are only an illustration of a preferred example, but are not limited thereto. When implementing the present utility model, appropriate replacement and / or modification can be performed according to user needs.

[0045] The number of devices and processing scales described here are used to simplify the description of the utility model. Applications, modifications and variations of the utility model are obvious to those skilled in the art.

[0046] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and the embodiments. It can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily realized. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described here.

Claims

1. A basalt fiber metal composite tube, comprising: A base pipe, wherein both ends of the base pipe are connecting sections, an intermediate section is between the two connecting sections, and the outer diameter of the intermediate section is smaller than the outer diameter of the connecting section, and an inclined transition is provided between the intermediate section and the connecting section, and the two connecting sections are respectively provided with connecting grooves matched with couplings near the ends, characterized in that it also includes: a basalt fiber layer arranged on the outer periphery of the base pipe and covering the outer side of the base pipe except for the connecting groove; The end surface of one connecting section of the base pipe is provided with a convex ring, and the end surface of the other connecting section is provided with a ring groove adapted to the convex ring; The inner side surface of the convex ring is flush with the inner wall of the base pipe; The outer side surface of the convex ring is inclined, and a flexible layer is arranged on it to form a sealing layer after being pressed against the ring groove.

2. The basalt fiber metal composite tube according to claim 1, characterized in that: The outer wall of the base pipe is configured as a rough surface at a contact point with the basalt fiber layer.

3. The basalt fiber metal composite tube according to claim 1, characterized in that: The section of the connecting section where no connecting groove is provided is a connecting section; Annular grooves are arranged at intervals between the inclined surface and the surface of the connecting section.

4. The basalt fiber metal composite tube according to claim 1, characterized in that: The outer surfaces of the basalt fiber layers covering the middle section and the connecting section are flush.

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