Gas barrier structure of RTP pipe
By adding a barrier layer between the internal tube of the RTP tube and the enhanced layer, the problem of enhanced layers of corrosion is solved, the service life of the pipeline is prolonged, and the intensity of the pipeline is enhanced.
Patent Information
- Application Number
- CN202421084122.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-17
- Publication Date
- 2025-01-24
- Estimated Expiration
- 2034-05-17
AI Technical Summary
During the use of existing RTP pipes, the reinforcement layer is prone to corrosion, resulting in a shortening of the service life of the pipe.
Add block layers between the internal tube and the enhanced layer. The blocking layer is connected to the inner tube through the adhesive layer and the grid layer to reduce gas penetration and protect the enhanced layer.
It effectively reduces the corrosion of the reinforcement layer, extends the service life of the RTP pipe, and improves the overall strength of the pipeline through the bonding design of the reinforcement layer.
Smart Images
Figure CN222392178U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of pipelines, in particular to a gas barrier structure of an RTP pipe. Background Art
[0002] RTP pipe is the abbreviation of Reinforced Thermoplastic Pipe, which means "reinforced thermoplastic pipe" in Chinese. Most RTP pipes are composed of an inner pipe, a fiber reinforcement layer, and a protective outer layer. Because of its corrosion resistance, high pressure resistance, light weight, high flexibility, and coilability, it is widely used in land, oil, sewage, chemicals, gas transportation and other fields. However, after long-term use, small molecular corrosive gases may pass through the inner pipe and contact with the fiber reinforcement layer, thereby corroding the reinforcement layer, shortening the service life of the RTP pipe. Summary of the invention
[0003] In view of the above situation, in order to overcome the defects of the prior art, the purpose of the utility model is to provide a gas barrier structure for an RTP pipe, which solves the technical problem that the reinforcement layer of the existing RTP pipe is prone to corrosion when in use, thereby shortening the service life of the RTP pipe.
[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0005] A gas barrier structure of an RTP pipe comprises: an inner pipe; a barrier layer arranged on the outer side of the inner pipe; a reinforcement layer arranged on the outer side of the barrier layer; and a protective layer arranged on the outer side of the reinforcement layer; wherein the barrier layer and the inner pipe are connected via a first connection structure, and the first connection structure comprises a glue layer and a mesh layer arranged in the glue layer.
[0006] The utility model adds a barrier layer between the inner tube and the reinforcement layer. The barrier layer can reduce the content of gases such as HS2, CO2 or water that penetrate into the reinforcement layer, thereby significantly improving the corrosion of the reinforcement layer, playing a good protective role for the reinforcement layer, and extending the service life of the RTP pipe.
[0007] Optionally, the barrier layer and the reinforcement layer are connected via a second connecting structure.
[0008] Optionally, the reinforcement layer and the protective layer are connected via a third connection structure.
[0009] Optionally, the second connection structure and / or the third connection structure is the same as the first connection structure.
[0010] The inner tube, barrier layer, reinforcement layer and protective layer are bonded into a whole through a connecting structure. By strengthening the bonding design between the layers, the performance of the RTP pipe is greatly improved and the overall strength of the RTP pipe is increased.
[0011] Optionally, the barrier layer is any one of PA6, PA11, PVDF and EVOH.
[0012] Optionally, the reinforcement layer includes: a first steel layer, which is spirally wound along the axial direction of the inner tube and outside the barrier layer; and a second steel layer, which is spirally wound along the axial direction of the inner tube and outside the first steel layer; wherein the winding directions of the first steel layer and the second steel layer are opposite. The reinforcement layer can further improve the strength of the RTP pipe by adopting the arrangement of the first steel layer and the second steel layer, so that the RTP pipe can withstand higher pressure and extend the service life of the RTP pipe.
[0013] Optionally, the first steel layer and the second steel layer are steel strips with rectangular cross-sections, and the second steel layer covers the gaps existing when the first steel layer is wound. The second steel layer covers the gaps existing when the first steel layer is wound, which is conducive to eliminating the non-pressure-bearing property caused by the winding gaps and improving the pressure-resistant function of the RTP pipe.
[0014] Optionally, a partition is provided between the first steel layer and the second steel layer, the partition is spirally wound on the first steel layer along the axial direction of the inner tube, and the second steel layer is wound on the partition, which is beneficial to reduce the friction between the steel layers and improve the fatigue life of the RTP tube.
[0015] Optionally, the partition is a strip structure made of polyester material.
[0016] Optionally, the first steel layer is provided with a plurality of first through holes, and the second steel layer is provided with a plurality of second through holes, which is conducive to preventing the layers from sliding relative to each other.
[0017] Compared with the prior art, the beneficial effects of the utility model are:
[0018] 1. The utility model adds a barrier layer between the inner tube and the reinforcement layer. The barrier layer can reduce the content of gases such as HS2, CO2 or water that penetrate into the reinforcement layer, thereby significantly improving the corrosion of the reinforcement layer, playing a good protective role on the reinforcement layer, and extending the service life of the RTP pipe.
[0019] 2. The inner tube, barrier layer, reinforcement layer and protective layer are bonded into a whole through a connecting structure. By strengthening the bonding design between the layers, the performance of the RTP tube is greatly improved and the overall strength of the RTP tube is increased.
[0020] 3. The reinforcement layer can further improve the strength of the RTP pipe by adopting the arrangement of the first steel layer and the second steel layer, so that the RTP pipe can withstand higher pressure and extend the service life of the RTP pipe. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0022] Figure 1 Schematic diagram of the structure of an embodiment of the gas barrier structure of the RTP tube in this embodiment.
[0023] Figure 2 FIG. 4 is a schematic diagram of the structure of an embodiment of the enhancement layer in this embodiment.
[0024] Figure numerals: 1, inner tube; 2, first connecting structure; 3, barrier layer; 4, reinforcement layer; 41, first steel layer; 42, second steel layer; 43, barrier layer; 5, protective layer; 6, second connecting structure; 7, third connecting structure. DETAILED DESCRIPTION
[0025] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the embodiments of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.
[0026] In the description of the embodiments of the present utility model application, it needs to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", "end", "side", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present utility model application 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 cannot be understood as a limitation on the embodiments of the present utility model application.
[0027] 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 technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present utility model application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.
[0028] In the embodiments of the present utility model application, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like 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, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model application can be understood according to the specific circumstances.
[0029] In the embodiments of the utility model application, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.
[0030] The disclosure below provides many different embodiments or examples for realizing different structures of the embodiments of the utility model application. In order to simplify the disclosure of the embodiments of the utility model application, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the embodiments of the utility model application. In addition, the embodiments of the utility model application can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.
[0031] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.
[0032] Example 1
[0033] like Figure 1 As shown, the embodiment of the utility model application provides a gas barrier structure of an RTP pipe, including an inner pipe 1 and a barrier layer 3 arranged on the outer side of the inner pipe 1 through a first connection structure 2, and a reinforcement layer 4 and a protective layer 5 are arranged on the outer side of the barrier layer 3. By adding the barrier layer 3 between the inner pipe 1 and the reinforcement layer 4, the barrier layer 3 can reduce the content of gases such as HS2, CO2 or water that penetrate into the reinforcement layer through the polyethylene layer on the inner wall of the RTP pipe, thereby significantly improving the hydrocarbon corrosion of the polyethylene material, the corrosion of the steel material or the hydrolysis corrosion of the glass fiber layer, etc., and plays a good protective role on the reinforcement layer 4.
[0034] Optionally, the barrier layer 3 may be PA6 (nylon white particle 6), PA11 (nylon white particle 11), PVDF (PVDF polyvinylidene fluoride, with the appearance of translucent or white powder or particles) or EVOH (ethylene-vinyl alcohol copolymer), and the barrier layer 3 may select a suitable material according to specific working conditions. EVOH is preferred, as ethylene-vinyl alcohol copolymer not only exhibits excellent processing properties, but also exhibits excellent blocking effects on gases, odors, fragrances, solvents, etc., and has a better barrier effect. At the same time, due to its thermal stability in combination with ethylene, the multilayer container containing the EVOH barrier layer is completely reusable.
[0035] Furthermore, the first connection structure 2 includes a glue layer and a mesh layer disposed in the glue layer. Since most gas barrier layer materials have no affinity with the inner tube 1, the first connection structure 2 is used to provide a bonding interface between the two. At the same time, by arranging a glue layer on the surface of the inner tube 1 and pressing the mesh layer onto the glue layer, the adhesion between the barrier layer 3 and the inner tube 1 can be increased.
[0036] Optionally, the mesh layer may be made of polyvinyl chloride mesh.
[0037] Optionally, the thickness of the mesh layer may be 0.5 mm to 1 mm, preferably 1 mm.
[0038] In one embodiment, the barrier layer 3 and the reinforcement layer 4 are connected via a second connection structure 6, and the second connection structure 6 serves to connect two adjacent layers of materials.
[0039] Optionally, the second connection structure 6 includes an adhesive layer.
[0040] Optionally, the second connection structure 6 is the same as the first connection structure 2, that is, the second connection structure 6 includes an adhesive layer and a grid layer disposed in the adhesive layer. The barrier layer 3 is connected to the reinforcement layer 4 through the adhesive layer pressed with the grid layer, which is conducive to improving the adhesion effect.
[0041] In one embodiment, the reinforcement layer 4 and the protection layer 5 are connected via a third connection structure 7 , and the third connection structure 7 serves to connect two adjacent layers of materials.
[0042] Optionally, the third connection structure 7 includes an adhesive layer.
[0043] Optionally, the third connection structure 7 is the same as the first connection structure 2, that is, the third connection structure 7 includes a glue layer and a grid layer disposed in the glue layer. The reinforcement layer 4 is connected to the reinforcement layer 4 through the glue layer pressed with the grid layer, which is conducive to improving the adhesion effect.
[0044] In this embodiment, the barrier layer 3 is added between the inner tube 1 and the reinforcement layer 4, which can provide good protection for the reinforcement layer 4. At the same time, the layers are bonded into a whole through the connection structure, and the bonding reinforcement design between the layers is greatly improved, which greatly improves the performance of the RTP pipe and increases the overall strength of the RTP pipe.
[0045] Example 2
[0046] like Figure 2 As shown, based on Example 1, in this embodiment, the reinforcement layer 4 includes a first steel layer 41 and a second steel layer 42. The first steel layer 41 is spirally wound on the outside of the barrier layer 3 along the axial direction of the inner tube 1, and the second steel layer 42 is spirally wound on the outside of the first steel layer 41 along the axial direction of the inner tube 1, and the winding directions of the first steel layer 41 and the second steel layer 42 are opposite. By setting the first steel layer 41 and the second steel layer 42, the strength of the RTP pipe can be improved and can withstand higher pressure.
[0047] Optionally, the first steel layer 41 and the second steel layer 42 may be steel strips with rectangular cross-sections.
[0048] Optionally, the first steel layer 41 is spirally wound along the axial direction of the inner tube 1 with the minimum gap as the standard, and the second steel layer 42 is spirally wound in the opposite direction, and the second steel layer 42 covers the above gap. The second steel layer 42 covers the gap existing when the first steel layer 41 is wound, which is beneficial to eliminate the non-pressure bearing property caused by the winding gap and improve the pressure resistance function of the RTP pipe.
[0049] Optionally, a partition layer 43 is provided between the first steel layer 41 and the second steel layer 42, the partition layer 43 is spirally wound on the first steel layer 41 along the axial direction of the inner tube 1, and the second steel layer 42 is wound on the partition layer 43. By providing the partition layer 43, the friction between the steel layers can be reduced and the fatigue life of the RTP pipe can be improved.
[0050] Optionally, the partition layer 43 may be a belt-shaped structure made of polyester material.
[0051] Optionally, a plurality of first through holes are opened on the first steel layer 41, and a plurality of second through holes are opened on the second steel layer 42, which are not shown in the through hole diagram. The arrangement of the through holes makes it difficult for the first steel layer 41 and the barrier layer 3 and the interlayer 43, and for the second steel layer 42 and the protective layer 5 and the interlayer 43 to slide relative to each other.
[0052] Optionally, the first steel layer 41 and the second steel layer 42 may be made of multiple materials, that is, the first steel layer 41 may be made of 2 or 3 steel strips with equal rectangular cross-sections, and the second steel layer 42 may also be made of 2 or 3 steel strips with equal rectangular cross-sections.
[0053] Parts not described in detail in this embodiment are well-known techniques in the art.
[0054] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.
Claims
1. A gas barrier structure of an RTP tube, characterized in that: include: Inner tube; A barrier layer is disposed on the outer side of the inner tube; A reinforcing layer, disposed outside the barrier layer; A protective layer, disposed outside the reinforcement layer; Wherein, the barrier layer and the inner tube are connected via a first connection structure, and the first connection structure includes a glue layer and a mesh layer arranged in the glue layer.
2. The gas barrier structure of the RTP tube according to claim 1, characterized in that: The barrier layer and the reinforcement layer are connected via a second connection structure.
3. The gas barrier structure of the RTP tube according to claim 2, characterized in that: The reinforcement layer and the protection layer are connected via a third connection structure.
4. The gas barrier structure of the RTP tube according to claim 3, characterized in that: The second connection structure and / or the third connection structure are the same as the first connection structure.
5. The gas barrier structure of the RTP tube according to claim 1, characterized in that: The barrier layer is any one of PA6, PA11, PVDF and EVOH.
6. The gas barrier structure of the RTP tube according to any one of claims 1 to 5, characterized in that: The enhancement layer comprises: A first steel layer, spirally wound along the axial direction of the inner tube and outside the barrier layer; A second steel layer is spirally wound around the outer side of the first steel layer along the axial direction of the inner tube; Wherein, the first steel layer and the second steel layer are wound in opposite directions.
7. The gas barrier structure of the RTP tube according to claim 6, characterized in that: The first steel layer and the second steel layer are steel strips with rectangular cross-sections, and the second steel layer covers the winding gap of the first steel layer.
8. The gas barrier structure of the RTP tube according to claim 6, characterized in that: A partition is provided between the first steel layer and the second steel layer. The partition is spirally wound on the first steel layer along the axial direction of the inner tube, and the second steel layer is wound on the partition.
9. The gas barrier structure of the RTP tube according to claim 8, characterized in that: The partition is a strip structure made of polyester material.
10. The gas barrier structure of the RTP tube according to claim 6, characterized in that: The first steel layer is provided with a plurality of first through holes, and the second steel layer is provided with a plurality of second through holes.