High-wear-resistance nonmetal marine flexible pipeline inner wall wear measurement system and method

Abstract

The invention belongs to the technical field of marine flexible pipelines, and provides a high-wear-resistance nonmetal marine flexible pipeline inner wall wear measurement system and method.Metal resistance wire grids which are consistent in resistance value and integrated in a parallel connection mode are vertically embedded into a flexible pipeline wear-resistant layer, and the metal resistance wire grids can be rectangular, arc-shaped or annular; the embedded, multi-point and high-precision monitoring on the abrasion of the inner wall of the pipeline is realized by matching with the packaging of the covering layer; the problems that an existing monitoring device can only be installed on a pipeline joint or outside, so that global monitoring cannot be achieved, the monitoring device is prone to being affected by marine environment corrosion, the integrity and local performance of a pipeline are damaged, and measurement is inaccurate under the conditions of pipeline movement and non-uniform abrasion are effectively solved. Therefore, flexible, stable and accurate measurement of abrasion conditions of different pipe sections can be realized in the service process of the pipeline, and the mechanical property of the pipeline is not influenced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of marine flexible pipe, in particular to a high wear resistance non-metallic marine flexible pipe inner wall wear measurement system and method. BACKGROUND

[0002] With the development of science and economy, land resources have been difficult to meet the current demand, and all countries have turned their eyes to the exploitation of marine resources, which mainly includes the exploitation of oil and gas and mineral resources. The flexible pipe used for exploitation is one of the key equipment in the entire resource exploitation system, especially for the mining pipe, because the fluid mixed with the ore slurry particles will cause wear to the inner wall of the wear-resistant layer of the pipe. Because the service life of the mining pipe is several years, it is very important to monitor the wear during the service process to prevent excessive wear of the pipe, which will cause the pipe to be damaged and cause huge economic losses and environmental pollution.

[0003] On the one hand, although the prior art can monitor the wear of the pipe, the monitoring device needs to be installed on the pipe joint through the flange. Only the wear measurement near the end of the pipe is accurate enough, and it is impossible to achieve overall monitoring. The flexible pipe is not a straight line in the service process and will move with the load and working conditions. There may be a large difference in wear at different positions of the pipe. At the same time, although the prior art can be installed at different positions of the pipe to monitor the wear at different positions of the pipe, it needs to be installed on the outside of the pipe. Under the long-term movement and marine corrosion, it cannot guarantee stable work, and it will also damage the integrity of the pipe and affect the local performance of the pipe. SUMMARY

[0004] Therefore, one object of the present application is to provide a high wear resistance non-metallic marine flexible pipe inner wall wear measurement system and method to solve the problems mentioned in the background art and overcome the deficiencies in the prior art.

[0005] To achieve the above-mentioned purpose, on the one hand, the present application provides a high wear resistance non-metallic marine flexible pipe inner wall wear measurement system, comprising: A plurality of metal resistance wire grids and a plurality of sub-monitoring systems, each metal resistance wire grid is connected to a sub-monitoring system, and a plurality of sub-monitoring systems form a total monitoring system, The metal resistance wire grid comprises a plurality of evenly spaced and parallel resistance wires, each resistance wire has the same resistance, and a layer of covering layer is pasted on the front and back surfaces of the plurality of resistance wires for packaging. Lead wires are led out from both sides of the parallel resistance wires, and the metal resistance wire grid is connected to the sub-monitoring system through the lead wires; The metal resistance wire grid is vertically embedded into the inner wall of the wear-resistant layer of the flexible pipe.

[0006] As preferred, the resistance wire is linear, and several linear resistance wires form a rectangular metal resistance wire grid.

[0007] As preferred, the resistance wire is arc-shaped, and several arc-shaped resistance wires form an arc-shaped metal resistance wire grid, the arc curvature of the arc-shaped metal resistance wire grid is the same as that of the wear-resistant layer of the flexible pipeline.

[0008] As preferred, the resistance wire is ring-shaped, and several ring-shaped resistance wires form a ring-shaped metal resistance wire grid, the arc curvature of the ring-shaped metal resistance wire grid is the same as that of the wear-resistant layer of the flexible pipeline.

[0009] As preferred, the plane where the rectangular metal resistance wire grid is located is the same as the axis of the wear-resistant layer of the flexible pipeline, and several rectangular metal resistance wire grids are linearly and uniformly arranged at certain intervals in the axial direction of the flexible pipeline.

[0010] As preferred, the plane where the arc-shaped metal resistance wire grid is located is perpendicular to the axis of the wear-resistant layer of the flexible pipeline, and N arc-shaped metal resistance wire grids form a group, N , the N arc-shaped metal resistance wire grids in the same group are arranged along the circumference of the flexible pipeline, and several groups of arc-shaped metal resistance wire grids are uniformly arranged at certain intervals in the axial direction of the flexible pipeline.

[0011] As preferred, the plane where the ring-shaped metal resistance wire grid is located is perpendicular to the axis of the wear-resistant layer of the flexible pipeline, and several ring-shaped metal resistance wire grids are uniformly arranged at certain intervals in the axial direction of the flexible pipeline.

[0012] In another aspect, the present application provides a high-wear-resistant non-metallic marine flexible pipeline, which comprises the above-mentioned monitoring system, the flexible pipeline comprises a straight section and a curved section, the rectangular metal resistance wire grid is arranged on the straight section, and the arc-shaped metal resistance wire grid or the ring-shaped metal resistance wire grid is arranged on the curved section.

[0013] In another aspect, the present application provides a method for measuring the wear of the inner wall of a high-wear-resistant non-metallic marine flexible pipeline, which comprises: Each sub-monitoring system continuously monitors the resistance value of the metal resistance wire grid corresponding thereto and sends the monitoring data to the total monitoring system, and the total monitoring system determines the wear amount and wear position of the inner wall of the flexible pipeline according to the resistance value of the metal resistance wire grid monitored by the sub-monitoring system.

[0014] As preferred, determining the wear amount and wear position of the inner wall of the flexible pipeline according to the resistance value of the metal resistance wire grid monitored by the sub-monitoring system comprises: When the inner wall of the flexible pipeline is worn, the single resistance wires in the metal resistance wire grid are worn out one by one, the width of the metal resistance wire grid is t, the number of resistance wires is n, the resistance value of a single resistance wire is , and the diameter of a single resistance wire is , the distance between the first resistance wire and the inner surface of the wear-resistant layer of the flexible pipe is s, then: The initial total resistance of the metal resistance wire grid is: ; When the mth resistance wire is worn out, the total resistance of the metal resistance wire grid becomes: ; The wear thickness of the wear-resistant layer of the flexible pipe is: ; That is, the number of metal resistance wire grids worn out is determined according to the resistance of the metal resistance wire grid, the wear thickness of the wear-resistant layer of the flexible pipe is determined according to the number of metal resistance wire grids worn out, and each sub-monitoring system is numbered, so that the wear position of the inner wall of the flexible pipe is determined.

[0015] Compared with the prior art, the present application has the following advantages and beneficial effects: The high-wear-resistance non-metallic marine flexible pipe inner wall wear measurement system and method can realize embedded, multi-point and high-precision monitoring of the wear of the inner wall of the pipe by vertically embedding the metal resistance wire grid with consistent resistance and integrated in parallel into the wear-resistant layer of the flexible pipe, and packaging with the cover layer, effectively solving the problems of the prior art, such as unable to monitor globally, easily affected by marine environment corrosion, damaging the integrity and local performance of the pipe, and inaccurate measurement under the conditions of pipe movement and non-uniform wear, so that flexible, stable and accurate measurement of the wear condition of different pipe sections during the service of the pipe can be realized, and the mechanical properties of the pipe itself are not affected.

[0016] Additional aspects and advantages of the application will be described in part below, some will become apparent from the following description, or will be learned by practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0017] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description, taken in conjunction with the accompanying drawings, in which: Figure 1 It is a structural schematic diagram of the high-wear-resistance non-metallic marine flexible pipe inner wall wear measurement system of the present application; Figure 2 It is a schematic diagram of the arrangement of the rectangular metal resistance wire grid in the axial direction of the embodiment of the present application; Figure 3 It is a schematic diagram of the structure of the rectangular metal resistance wire grid of the embodiment of the present application; Figure 4This is a schematic diagram of the arc-shaped metal resistance wire grid structure according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the annular metal resistance wire grid structure according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the arc-shaped metal resistance wire grid arrangement along the cross section of an embodiment of the present invention; Figure 7 This is a schematic diagram of the general underwater linear shape of a marine flexible pipeline according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the metal resistance wire grid lead arrangement in an embodiment of the present invention; Figure 9 This is a schematic diagram of the packaging at the metal resistance wire grid lead outlet of an embodiment of the present invention.

[0018] The components are: 1. Metal resistance wire grid; 2. Sub-monitoring system; 3. Resistance wire; 4. Covering layer; 5. Lead wire; 6. Protective sleeve; 7. Cap-shaped cut end; 8. Straight section; 9. Bending section. Detailed Implementation

[0019] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0020] like Figures 1-9 As shown, this embodiment of the invention provides a high-wear-resistant non-metallic marine flexible pipeline inner wall wear measurement system, comprising: A plurality of metal resistance wire grids 1 and a plurality of sub-monitoring systems 2 are provided, each of the metal resistance wire grids 1 being connected to one of the sub-monitoring systems 2, and the plurality of sub-monitoring systems 2 forming a total monitoring system. The metal resistance wire grid 1 includes several uniformly spaced and parallel resistance wires 3, each resistance wire 3 having the same resistance value. A cover layer 4 is attached to the front and back surfaces of the several resistance wires 3 for encapsulation. Leads 5 are led out from both sides of the parallel resistance wires 3, and the metal resistance wire grid 1 is connected to the sub-monitoring system 2 through the leads 5. The metal resistance wire grid 1 is vertically embedded in the wear-resistant layer of the flexible pipe.

[0021] Furthermore, vertical embedding refers to the situation where, when the metal resistance wire grid 1 is embedded into the inner wall of the wear-resistant layer of the flexible pipe, the plane of the metal resistance wire grid 1 is on the same plane as the axis of the wear-resistant layer of the flexible pipe, or the plane of the metal resistance wire grid 1 is perpendicular to the axis of the wear-resistant layer of the flexible pipe.

[0022] In one embodiment, the main components of the measurement system include: a metal resistance wire grid 1 and a sub-monitoring system 2. The metal resistance wire grid 1 is formed by processing multiple extremely fine single resistance wires 3 in parallel. Each resistance wire 3 has the same resistance value and needs to be encapsulated with a cover layer 4 on both the front and back surfaces to fix the shape and prevent the single resistance wires 3 from contacting each other. Leads 5 are left out. Finally, the formed metal resistance wire grid 1 is connected to the sub-monitoring system 2. The sub-monitoring system 2 should be able to accurately measure the resistance change of the metal resistance wire grid 1. When multiple metal resistance wire grids 1 are used together, each metal resistance wire grid 1 requires a sub-monitoring system 2 to independently monitor the resistance change of each metal resistance wire grid 1. Each sub-monitoring system 2 is connected to the outside of the pipeline through the lead 5 protected by the protective sleeve 6, forming a total monitoring system on the outside. The outside is a ship on the sea, a base, or the ground. The total monitoring system needs to independently monitor the information obtained by each sub-monitoring system 2. The width of the metal resistance wire grid 1 needs to be less than the thickness of the pipe's wear-resistant layer, generally around 10mm. The diameter of a single resistance wire 3 should be less than 0.1mm, and they should be evenly connected in parallel within the resistance wire grid. The number of wires can be 50-100. The material can be nickel-chromium alloy, due to its high resistivity and good wire drawing performance; its resistivity is approximately 1.09. The lead wire 5 can be made of materials with good conductivity such as silver or copper, and the cover layer 4 can be made of non-metallic material. The thickness requirement is that the thickness of the metal resistance wire grid 1 after forming is less than 0.5mm.

[0023] It is understood that the pipe-shaped structure in the attached figure is only the wear-resistant layer of the high wear-resistant non-metallic marine flexible pipe. The high wear-resistant non-metallic marine flexible pipe also has other layer structures, such as insulation layer, tensile armor layer, sheath layer, etc., which are not shown in the figure. The metal resistance wire grid 1 of the present invention is disposed in the wear-resistant layer and is used to monitor and measure the wear of the wear-resistant layer.

[0024] like Figure 8 and Figure 9 As shown, lead wire 5 extends from the outer wall of the wear-resistant layer of the pipe and is placed in a protective sleeve 6 with an inner diameter slightly larger than that of lead wire 5. In order to better fit the pipe wall, the protective sleeve 6 has a flat elliptical cross section. The protective sleeve 6 is bonded and fixed to the outer wall of the wear-resistant layer. The protective sleeve 6 is cut to form a cap-shaped cut end 7. The cap-shaped cut end 7 covers the lead wire 5 at the outlet position and is bonded and fixed. Each protective sleeve 6 corresponding to each metal resistance wire grid 1 should be marked for identification.

[0025] In one embodiment, such as Figure 3 As shown, the resistance wire 3 is straight, and several straight resistance wires 3 form a rectangular metal resistance wire grid. Figure 2As shown, the plane containing the rectangular metal resistance wire grid is on the same plane as the axis of the wear-resistant layer of the flexible pipe, and several rectangular metal resistance wire grids are arranged in a straight line at certain intervals along the axial direction of the flexible pipe.

[0026] The advantage of the rectangular metal resistance wire grid arrangement scheme is that by appropriately setting the length of the metal resistance wire grid 1 and arranging it continuously, it is possible to perform global monitoring of a section of flexible pipe where the high wear cross section of the wear-resistant layer cannot be determined. It is suitable for situations where the wear of the wear-resistant layer cross section of flexible pipe is uniform. Compared with the arc-shaped metal resistance wire grid and the annular metal resistance wire grid, this arrangement scheme requires fewer rectangular metal resistance wire grids and sub-monitoring systems 2, resulting in lower costs.

[0027] In one implementation, the lengths of the several resistance wires 3 in the rectangular metal resistance wire grid are the same.

[0028] In one embodiment, such as Figure 4 and Figure 6 As shown, the resistance wire 3 is arc-shaped, and several arc-shaped resistance wires 3 form an arc-shaped metal resistance wire grid. The curvature of the arc-shaped metal resistance wire grid is the same as the curvature of the wear-resistant layer of the flexible pipe. The plane containing the arc-shaped metal resistance wire grid is perpendicular to the axis of the wear-resistant layer of the flexible pipe (i.e., the plane containing the arc-shaped metal resistance wire grid is parallel to the cross-section of the flexible pipe). N arc-shaped metal resistance wire grids form a group, and N... N arc-shaped metal resistance wire grids of the same group are uniformly arranged in an array along the circumference of the flexible pipe, and several groups of arc-shaped metal resistance wire grids are uniformly arranged at certain intervals along the axial direction of the flexible pipe.

[0029] In this embodiment, the metal resistance wire grid 1 is made into an arc-shaped structure with an arc curvature consistent with the wear-resistant layer of the pipeline to be monitored, and the resistance value of each resistance wire 3 is the same. During arrangement, the plane of the arc-shaped metal resistance wire grid is parallel to the cross-section of the pipeline and is placed vertically within the wear-resistant layer. The advantage of this arrangement is that it is suitable for situations where the wear-resistant layer cross-section of flexible pipelines is unevenly worn, avoiding inaccurate monitoring caused by uneven wear at the same cross-section, and further improving monitoring accuracy. This scheme can be used for... Figure 6The array arrangement shown allows for sufficiently high monitoring accuracy with a smaller array size. The arc-shaped metal resistance wire grid needs to be placed parallel to the cross-section. If the width of the arc-shaped metal resistance wire grid is too large or the array arrangement is too dense, the continuity of the pipe's wear-resistant layer will be affected, potentially weakening the axial performance of the wear-resistant layer structure. To prevent impact on the pipe's mechanical properties, when using this arrangement, the arrangement position s (i.e., the distance from the first resistance wire 3 of the metal resistance wire grid 1 to the inner surface of the flexible pipe's wear-resistant layer) should ideally be greater than 0. The array can be evenly spaced, with the width of each arc-shaped metal resistance wire grid preferably not exceeding 1 / 3 of the pipe's wear-resistant layer thickness, the arc center angle preferably not exceeding 35°, and the total arc center angle of the array preferably not exceeding 180°.

[0030] As one implementation method, such as Figure 6 As shown, the arc-shaped metal resistance wire grids are arranged in groups of four, and the N arc-shaped metal resistance wire grids in the same group are evenly arranged in an array along the circumference of the flexible pipe, respectively in the upper, lower, left and right directions of the wear-resistant layer of the flexible pipe.

[0031] In one implementation, the arc-shaped metal resistance wire grid can also be arranged in groups of two, with the two arc-shaped metal resistance wire grids in the same group being evenly arranged along the circumference of the flexible pipe, respectively arranged on the upper, lower or left and right sides of the wear-resistant layer of the flexible pipe.

[0032] In one implementation, the arc-shaped metal resistance wire grid can also be arranged in groups of eight. The eight arc-shaped metal resistance wire grids in the same group are evenly arranged in an array along the circumference of the flexible pipe, and are respectively arranged in eight directions: top, bottom, left, right, upper left, lower left, upper right, and lower right of the wear-resistant layer of the flexible pipe.

[0033] In other words, this invention does not specifically limit the number of arc-shaped metal resistance wire grids in the same group. The number of arc-shaped metal resistance wire grids in the same group can be selectively set according to factors such as the length of the arc-shaped metal resistance wire grids and the perimeter of the wear-resistant layer of the flexible pipe. Any number of arc-shaped metal resistance wire grids in the same group that can be uniformly arrayed along the circumference of the flexible pipe, thereby being suitable for situations where the wear-resistant layer cross-section of the flexible pipe is unevenly worn, and avoiding inaccurate monitoring caused by uneven wear of the pipe at the same cross-section, and thus improving monitoring accuracy, are all within the protection scope of this invention.

[0034] In one implementation, the lengths of the several resistance wires 3 in the arc-shaped metal resistance wire grid are the same.

[0035] In another implementation, the arc of several resistance wires 3 in the arc-shaped metal resistance wire grid is the same.

[0036] In one embodiment, such as Figure 5As shown, the resistance wire 3 is annular, and several annular resistance wires 3 form annular metal resistance wire grids. The curvature of the annular metal resistance wire grids is the same as the curvature of the wear-resistant layer of the flexible pipe. The plane containing the annular metal resistance wire grids is perpendicular to the axis of the wear-resistant layer of the flexible pipe, and several annular metal resistance wire grids are evenly arranged at certain intervals along the axial direction of the flexible pipe.

[0037] In this embodiment, the metal resistance wire grid 1 can be made into a relatively complete annular shape, with an arc curvature consistent with the wear-resistant layer of the pipeline to be monitored, and each resistance wire 3 having the same resistance value. During arrangement, the plane of the annular metal resistance wire grid is parallel to the cross-section of the pipeline and placed vertically within the wear-resistant layer. The advantage of this arrangement is that it is suitable for situations where the wear-resistant layer cross-section of a flexible pipeline is unevenly worn, enabling comprehensive monitoring of the cross-sectional wear at the location of the metal resistance wire grid 1, without worrying about discrepancies between the monitoring results and reality due to uneven wear. If the width of the annular metal resistance wire grid is too large, it will also affect the continuity of the pipeline's wear-resistant layer. Therefore, to prevent the annular metal resistance wire grid from affecting the mechanical properties of the pipeline, when using this arrangement, the arrangement position s (i.e., the distance from the first resistance wire 3 (the innermost resistance wire 3) of the metal resistance wire grid 1 to the inner surface of the wear-resistant layer of the flexible pipeline) should preferably be greater than 0. The annular metal resistance wire grid should be as thin as possible and as narrow as possible, and the spacing between adjacent annular metal resistance wire grids should be larger than the spacing in rectangular or arc-shaped metal resistance wire grid arrangements.

[0038] It is understood that the annular metal resistance wire grid is not a completely closed circle, such as... Figure 5 As shown, the annular metal resistance wire grid has an opening on the ring, and the annular resistance wire 3 is led out through the lead wire 5 at the opening.

[0039] In one implementation, the lengths of the resistance wires 3 in the annular metal resistance wire grid are the same.

[0040] In another implementation, the arc of several resistance wires 3 in the annular metal resistance wire grid is the same.

[0041] It is understood that the intervals in the above embodiments of the present invention are not fixed. For example, the axial spacing between two adjacent metal resistance wire grids in the first half of the flexible pipe is 'a', and the axial spacing between two adjacent metal resistance wire grids in the second half of the flexible pipe is 'b'. b. For example, the axial spacing between two adjacent metal resistance wire grids at a location of severe wear in the flexible pipe is 'a', and the axial spacing between two adjacent metal resistance wire grids at a location of slight wear in the flexible pipe is 'b', where 'a' is the distance between the two adjacent metal resistance wire grids. b.

[0042] In one embodiment, the present invention provides a high wear-resistant non-metallic flexible marine pipeline, or the application of the measurement system of the present invention on a high wear-resistant non-metallic flexible marine pipeline, including the above-mentioned measurement system. The flexible pipeline includes a straight section 8 and a curved section 9. A rectangular metal resistance wire grid is provided on the straight section 8, and an arc-shaped metal resistance wire grid or an annular metal resistance wire grid is provided on the curved section 9.

[0043] In this embodiment, such as Figure 7 As shown, since there are various arrangement shapes in the marine flexible pipeline during operation, it can be simply divided into straight section 8 and curved section 9. For straight section 8, the wear caused by internal fluid scouring is generally evenly distributed circumferentially across the pipeline cross-section (i.e., the wear of the wear-resistant layer cross-section of the flexible pipeline is uniform throughout). Therefore, the arrangement of the rectangular metal resistance wire grid in the above embodiment can be used, placing the rectangular resistance wire grid along the pipeline axis in the wear-resistant layer. For curved section 9, the wear caused by internal fluid scouring may be uneven at the same cross-section due to factors such as the flow velocity of the fluid inside the pipeline and the characteristics of the fluid or fluid-solid mixture (i.e., the wear of the wear-resistant layer cross-section of the flexible pipeline is uneven throughout). Therefore, the arrangement of the arc-shaped metal resistance wire grid or the annular metal resistance wire grid in the above embodiment can be adopted in curved section 9, placing the arc-shaped metal resistance wire grid or the annular metal resistance wire grid parallel to the cross-section of the pipeline wear-resistant layer.

[0044] This invention achieves embedded, multi-point, high-precision monitoring of pipe inner wall wear by vertically embedding a metal resistance wire grid (which can be rectangular, arc-shaped, or ring-shaped) with consistent resistance and integrated in parallel, and encapsulating it with a cover layer. This effectively solves the problems of existing monitoring devices, which can only be installed at pipe joints or externally, resulting in the inability to monitor globally, susceptibility to corrosion in marine environments, damage to pipe integrity and local performance, and inaccurate measurement under pipe movement and non-uniform wear conditions. Thus, it can achieve flexible, stable, and accurate measurement of wear conditions in different pipe sections (including straight and curved sections) during pipeline service without affecting the pipe's mechanical properties.

[0045] In one embodiment, the present invention provides a method for measuring wear on the inner wall of a highly wear-resistant non-metallic marine flexible pipeline, comprising: Each sub-monitoring system 2 continuously monitors the resistance value of its corresponding metal resistance wire grid 1 and sends the monitoring data to the main monitoring system. The main monitoring system determines the amount and location of wear on the inner wall of the flexible pipe based on the resistance value of the metal resistance wire grid 1 monitored by the sub-monitoring system 2.

[0046] Furthermore, the determination of the wear amount and location of the flexible pipe's inner wall based on the resistance value of the metal resistance wire grid 1 monitored by the sub-monitoring system 2 includes: When the inner wall of the flexible pipe wears down, the individual resistance wires 3 in the metal resistance wire grid 1 break one by one. Let the width of the metal resistance wire grid 1 be t (equivalent to the distance t between the first and last resistance wires 3), the number of resistance wires 3 be n, and the resistance of a single resistance wire 3 be n. The diameter of a single resistance wire 3 is If the distance s between the first resistance wire 3 and the inner surface of the wear-resistant layer of the flexible pipe is s, then: The initial total resistance of the metal resistance wire grid 1 is: ; When the m-th resistance wire 3 is broken, the total resistance of the metal resistance wire grid 1 becomes: ; The wear thickness of the wear-resistant layer of the flexible pipe is: ; That is, the number of broken resistance wires 3 of the metal resistance wire grid 1 is determined based on the resistance of the metal resistance wire grid 1, and the wear thickness of the wear-resistant layer of the flexible pipe is determined based on the number of broken resistance wires 3 of the metal resistance wire grid 1. At the same time, each sub-monitoring system 2 is numbered, and the sub-monitoring system 2 with different numbers corresponds to the metal resistance wire grid 1 at different positions on the flexible pipe, thereby determining the wear position of the inner wall of the flexible pipe.

[0047] During processing, the metal resistance wire grid 1 is vertically embedded into the inner wall of the pipe's wear-resistant layer. The first single resistance wire 3 of the metal resistance wire grid 1 should be almost at the pipe surface, or positioned at a distance s from the inner surface. s should not be too large. When the inner wall of the pipe's wear-resistant layer is worn, the metal resistance wire grid 1 will also be worn. Because the metal resistance wire grid 1 is composed of multiple single resistance wires 3 connected in parallel, wear on the inner wall of the pipe will cause the single resistance wires 33 in the metal resistance wire grid 1 to be worn away one by one, thus causing a change in the overall resistance value of the metal resistance wire grid 1. Let the width of the metal resistance wire grid 1 be t, and the diameter of the single resistance wire 3 be... The resistance value is If the quantity is n, then the initial total resistance of metal resistance wire grid 1 is... for: ; ; When pipe wear causes the first single metal resistance wire 3 to break, the resistance of the metal resistance wire grid 1... It becomes: ; Because the first single metal resistance wire 3 is located at the very top of the wire grid / near the inner surface of the wear-resistant layer of the flexible pipe, the wear thickness of the pipe is: ; When pipe wear causes the second single metal resistance wire 3 to break, the resistance of the metal resistance wire grid 1 becomes: ; At this point, the gap between the first metal resistance wire 3 and the second single metal resistance wire 3 has been worn away, so the wear thickness of the pipe at this time is: ; Similarly, when the m-th single resistance wire 3 is damaged, the resistance value of the metal resistance wire grid 1 becomes: ; The wear thickness of the pipe is: ; It can be seen that the single resistance wire has a diameter of 3 The finer the resistance wire, the more resistance wires 3 there are, and the smaller the distance between two adjacent resistance wires 3, the higher the monitoring accuracy of the system.

[0048] It is understood that the metal resistance wire grid 1 of this invention must be made of a high resistivity material, and its shape can be rectangular, arc-shaped, or ring-shaped to ensure that the resistance value of each metal resistance wire 3 is consistent. They are connected in parallel in a parallel layout, with a very small diameter for each individual resistance wire 3. The spacing between two adjacent resistance wires 3 should preferably not exceed the diameter of a single wire grid to ensure sufficient accuracy. The grid size corresponds to the size of the wear-resistant layer of the pipe. The lead wire 5 can be made of a highly conductive material. The sub-monitoring system 2 needs to be able to accurately measure the resistance change of the resistance wire grid. Discrete wear values ​​are measured by the resistance change caused by the breakage of the resistance wire 3 in the grid. The accuracy is adjustable; the denser the grid, the higher the accuracy.

[0049] Compared with the prior art, the present invention has the following advantages: The metal resistance wire grid 1 of the measurement system of the present invention is embedded inside the wear-resistant layer of the pipeline. It can be arranged in a straight line or in a combined array according to the requirements, and is placed at various key monitoring positions of the pipeline, thus solving the problem of global pipeline monitoring.

[0050] The metal electronic wire grid of the measurement system of this invention is small in size and can be embedded inside the pipe without damaging the pipe's integrity or affecting its mechanical properties.

[0051] The advantage of the rectangular metal resistance wire grid arrangement scheme in this embodiment of the invention is that by appropriately increasing the length of the metal resistance wire grid 1 and arranging it continuously, it is possible to monitor a pipe section where the high wear cross-section cannot be determined. The advantage of the arc-shaped metal resistance wire grid and the annular metal resistance wire grid arrangement scheme is that, if a certain location is known to be a high wear location, it can be arranged and implemented near it, and high-precision monitoring of the local area can be achieved.

[0052] The system of this invention has no external fittings attached to the surface of the flexible pipe, so there is no need to worry about corrosion from the external environment.

[0053] The measurement system and method of the present invention have a simple monitoring / measurement principle, controllable accuracy, and are easy to operate and set up.

[0054] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0055] It will be readily understood by those skilled in the art that this invention includes any combination of the inventive description and specific embodiments outlined in the foregoing specification, as well as the various parts shown in the accompanying drawings. Due to space limitations and for the sake of brevity, not all of these combinations have been described in detail. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

[0056] Although embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A wear measurement system for the inner wall of a high-wear-resistant non-metallic marine flexible pipeline, characterized in that, include: The system comprises several metal resistance wire grids and several sub-monitoring systems, with each metal resistance wire grid connected to one of the sub-monitoring systems, and the several sub-monitoring systems forming a total monitoring system. The metal resistance wire grid includes several uniformly spaced and parallel resistance wires, each with the same resistance value. A cover layer is attached to the front and back surfaces of the resistance wires for encapsulation. Leads are drawn from both sides of the parallel resistance wires, and the metal resistance wire grid is connected to the sub-monitoring system through the leads. The metal resistance wire grid is vertically embedded into the wear-resistant layer of the flexible pipe.

2. The high wear-resistant non-metallic marine flexible pipeline inner wall wear measurement system as described in claim 1, characterized in that, The resistance wire is straight, and several straight resistance wires form a rectangular metal resistance wire grid.

3. The high wear-resistant non-metallic marine flexible pipeline inner wall wear measurement system as described in claim 1, characterized in that, The resistance wire is arc-shaped, and several arc-shaped resistance wires form an arc-shaped metal resistance wire grid. The curvature of the arc-shaped metal resistance wire grid is the same as the curvature of the wear-resistant layer of the flexible pipe.

4. The wear measurement system for the inner wall of a high-wear-resistant non-metallic marine flexible pipeline as described in claim 1, characterized in that, The resistance wire is ring-shaped, and several ring-shaped resistance wires form a ring-shaped metal resistance wire grid. The curvature of the ring-shaped metal resistance wire grid is the same as the curvature of the wear-resistant layer of the flexible pipe.

5. The high wear-resistant non-metallic marine flexible pipeline inner wall wear measurement system as described in claim 2, characterized in that, The plane containing the rectangular metal resistance wire grid is on the same plane as the axis of the wear-resistant layer of the flexible pipe, and several of the rectangular metal resistance wire grids are arranged in a straight line at certain intervals along the axial direction of the flexible pipe.

6. The high wear-resistant non-metallic marine flexible pipeline inner wall wear measurement system as described in claim 3, characterized in that, The plane containing the arc-shaped metal resistance wire grid is perpendicular to the axis of the wear-resistant layer of the flexible pipe. The arc-shaped metal resistance wire grids are grouped into sets of N. N arc-shaped metal resistance wire grids of the same group are arranged along the circumference of the flexible pipe, and several groups of arc-shaped metal resistance wire grids are evenly arranged at certain intervals along the axial direction of the flexible pipe.

7. The wear measurement system for the inner wall of a high-wear-resistant non-metallic marine flexible pipeline as described in claim 4, characterized in that, The plane containing the annular metal resistance wire grid is perpendicular to the axis of the wear-resistant layer of the flexible pipe, and several of the annular metal resistance wire grids are evenly arranged at certain intervals along the axial direction of the flexible pipe.

8. A highly wear-resistant non-metallic flexible marine pipeline, comprising the measurement system according to any one of claims 1-7, characterized in that, The flexible pipe includes a straight section and a curved section. A rectangular metal resistance wire grid is provided on the straight section, and an arc-shaped metal resistance wire grid or an annular metal resistance wire grid is provided on the curved section.

9. A method for measuring wear on the inner wall of a highly wear-resistant non-metallic marine flexible pipeline, characterized in that, include: Each sub-monitoring system continuously monitors the resistance value of its corresponding metal resistance wire grid and sends the monitoring data to the main monitoring system. The main monitoring system determines the amount and location of wear on the inner wall of the flexible pipe based on the resistance value of the metal resistance wire grid monitored by the sub-monitoring system.

10. The method for measuring wear on the inner wall of a high-wear-resistant non-metallic marine flexible pipeline as described in claim 9, characterized in that, The determination of the wear amount and location of the flexible pipe's inner wall based on the resistance value of the metal resistance wire grid monitored by the sub-monitoring system includes: When the inner wall of the flexible pipe wears down, the individual resistance wires in the metal resistance wire grid break one by one. Let the width of the metal resistance wire grid be t, the number of resistance wires be n, and the resistance of a single resistance wire be... The diameter of a single resistance wire is If the distance s between the first resistance wire and the inner surface of the wear-resistant layer of the flexible pipe is s, then: The initial total resistance of the metal resistance wire grid is: ； When the m-th resistance wire is worn off, the total resistance of the metal resistance wire grid becomes: ； The wear thickness of the wear-resistant layer of the flexible pipe is: ； The number of broken resistance wires in the metal resistance wire grid is determined based on the resistance of the metal resistance wire grid. The wear thickness of the wear-resistant layer of the flexible pipe is determined based on the number of broken resistance wires in the metal resistance wire grid. At the same time, each sub-monitoring system is numbered, and different numbered sub-monitoring systems correspond to metal resistance wire grids at different locations on the flexible pipe, thereby determining the wear location on the inner wall of the flexible pipe.

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