A pipe lining

Abstract

The application provides a pipeline lining, which comprises at least three structural layers arranged from inside to outside, i.e., an inner film layer, a support layer and an outer film layer, and one or more functional bodies arranged at any position outside the support layer; the functional body can form a magnetic field interaction with a thickness measuring device, so that the thickness measuring device can determine the thickness of at least one structural layer in the pipeline lining by sensing the magnetic field.

Description

Technical Field

[0001] This invention belongs to the field of pipeline repair technology, specifically relating to a pipeline lining. Background Technology

[0002] When repairing pipelines, trenchless repair is more efficient than trenchless repair. Its main method involves attaching a resin-impregnated liner to the inner wall of the pipeline to be repaired, and then curing it through methods such as room temperature, heating, or ultraviolet radiation, thus forming a new liner at the repair site. However, there are still shortcomings in the use of pipeline repair liner. For example, it is difficult to actually measure the thickness of the liner, making it impossible to comprehensively and accurately assess the pipeline repair effect. Summary of the Invention

[0003] To address the aforementioned technical problems, the present invention provides a pipe liner.

[0004] The pipe lining includes at least three structural layers arranged from the inside out: an inner membrane layer, a support layer, and an outer membrane layer, as well as one or more functional bodies disposed at any position outside the support layer. The functional bodies can interact with a thickness measuring device to form a magnetic field, enabling the thickness measuring device to determine the thickness of at least one of the structural layers in the pipe lining by sensing the magnetic field.

[0005] In some embodiments, the functional body is disposed on the outside of the outer membrane layer; the functional body is used to allow the thickness measuring device to determine the total thickness of the support layer and the outer membrane layer by sensing the magnetic field after the inner membrane layer is peeled off; or, the functional body is used to allow the thickness measuring device to determine the total thickness of the inner membrane layer, the support layer and the outer membrane layer by sensing the magnetic field.

[0006] In some embodiments, the functional body includes: a first functional body, wherein the first functional body is a magnetically conductive material; the first functional body is used for the thickness measuring device to perform magnetic induction thickness measurement on at least one structural layer in the pipe lining; and / or, a second functional body, wherein the second functional body is a conductive material; the second functional body is used for the thickness measuring device to perform eddy current thickness measurement on at least one structural layer in the pipe lining.

[0007] In some embodiments, the functional body is a hard magnetic material, and the functional body is used for the thickness measuring device to perform magnetic induction thickness measurement on at least one structural layer in the pipe lining.

[0008] In some embodiments, the functional body is layered and disposed on the outer surface of at least one of the support layer and the outer membrane layer.

[0009] In some embodiments, the functional body is strip-shaped, and a plurality of the functional bodies are arranged in an interlaced mesh pattern.

[0010] In some embodiments, the pipe lining is a photocurable lining, and the support layer is made of glass fiber impregnated with photocurable resin.

[0011] In some embodiments, the pipe liner further includes: an ultraviolet (UV) shielding film disposed on the outside of the outer membrane layer; the functional body disposed between the UV shielding film and the outer membrane layer, or the functional body disposed on the outside of the UV shielding film.

[0012] In some embodiments, the pipe lining is a thermosetting lining, and the support layer is made of glass fiber impregnated with thermosetting resin.

[0013] In some embodiments, the material of the inner membrane layer includes at least one of polyamide, polyethylene, polyurethane, polypropylene, and polyvinyl chloride; the material of the outer membrane layer includes at least one of polyamide, polyethylene, polyurethane, polypropylene, and polyvinyl chloride.

[0014] In this invention, the functional element is positioned at any location outside the support layer and can interact with the thickness measuring device using a magnetic field. Thus, the thickness measuring device can sense the magnetic field between the two elements and obtain relevant parameters such as magnetic flux, magnetic induction intensity, induced electromotive force, and coil impedance, thereby determining the thickness of at least one structural layer in the pipe lining. This enables a comprehensive and accurate assessment of the pipe repair effect. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a pipe lining provided by the present invention; Figure 2 This is a schematic diagram of a functional body in a pipe lining provided by the present invention; Figure 3 This is a schematic diagram of a first functional body and a second functional body in a pipe lining provided by the present invention; Figure 4 This is a schematic diagram of a layered functional body in a pipe lining provided by the present invention; Figure 5 This is a schematic diagram of a strip-shaped functional body in a pipe lining provided by the present invention; Figure 6 This is a schematic diagram of an anti-ultraviolet film in a pipe lining provided by the present invention; Figure 7 This is a schematic diagram of another type of UV-protective film in a pipe lining provided by the present invention.

[0016] In the picture: 100 - Pipeline lining, 110 - Inner membrane layer, 120 - Support layer, 130 - Outer membrane layer, 140 - Functional body, 141 - First functional body, 142 - Second functional body, 150 - UV protection film. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0018] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0019] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0020] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0021] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0022] like Figure 1 As shown, the pipe lining 100 includes at least three structural layers arranged from the inside to the outside: an inner membrane layer 110, a support layer 120, and an outer membrane layer 130, as well as one or more functional bodies 140 disposed at any position outside the support layer 120; the functional body 140 can form a magnetic field interaction with the thickness measuring device, so that the thickness measuring device can determine the thickness of at least one of the structural layers in the pipe lining by sensing the magnetic field.

[0023] In this invention, the pipe liner 100 can be used for pipe repair. For example, the pipe liner 100 can be a cured-in-place pipe (CIPP) repair liner, such as a light-cured CIPP liner, a hot water-cured CIPP liner, or a steam-cured CIPP liner. It should be noted that the pipe liner 100 is not limited to CIPP repair liners; it can also be other types of liners, such as sleeve-type liners. No further limitations are imposed here.

[0024] The pipe liner 100 includes at least three structural layers arranged from the inside out: an inner membrane layer 110, a support layer 120, and an outer membrane layer 130. The support layer 120 can be a resin-impregnated woven material, such as glass fiber or a glass fiber / polyester blend. The inner membrane layer 110 and outer membrane layer 130 are used to prevent resin leakage. The pipe liner 100 may also include one or more functional elements 140. These functional elements 140 can be positioned anywhere outside the support layer 120, such as between the support layer 120 and the outer membrane layer 130, or outside the outer membrane layer 130. The functional elements 140 can interact with a thickness measuring device using a magnetic field. The thickness measuring device can be located inside the pipe, i.e., inside the inner membrane layer 110, to measure the thickness of the pipe liner 100. It should be noted that the pipe liner 100 may also include other structural layers; however, no further restrictions are imposed here.

[0025] For example, the thickness measuring device generates a magnetic field, and the functional body 140 is a material that can affect the magnetic field (such as a magnetically conductive or electrically conductive material); or the thickness measuring device does not generate a magnetic field, but the functional body 140 is a material that can generate a magnetic field (such as a hard magnetic material). In this way, the thickness measuring device can sense the magnetic field between itself and the functional body 140 and acquire magnetic field-related parameters, such as magnetic flux, magnetic induction intensity, induced electromotive force, coil impedance, and equivalent inductance, thereby determining the thickness of at least one structural layer in the pipe lining 100 (the thickness of the structural layer between the thickness measuring device and the functional body 140), to achieve a comprehensive and accurate assessment of the pipe repair effect. In some embodiments, to facilitate measurement and improve accuracy, the probe of the thickness measuring device can be placed close to the inner wall of the pipe lining 100.

[0026] In some embodiments, such as Figure 2 As shown, the functional body 140 is disposed on the outside of the outer film layer 130; the functional body 140 is used to allow the thickness measuring device to determine the total thickness of the support layer 120 and the outer film layer 130 by sensing the magnetic field after the inner film layer 110 is peeled off; or, the functional body 140 is used to allow the thickness measuring device to determine the total thickness of the inner film layer 110, the support layer 120 and the outer film layer 130 by sensing the magnetic field.

[0027] In this invention, after the resin in the support layer 120 has completely cured, the inner membrane layer 110 can be peeled off. Thus, the functional body 140 can be positioned outside the outer membrane layer 130, and a thickness measuring device located inside the pipe can form a magnetic field with the functional body 140. Before peeling off the inner membrane layer 110, the thickness measuring device can determine the total thickness of the inner membrane layer 110, the support layer 120, and the outer membrane layer 130; and after peeling off the inner membrane layer 110, the thickness measuring device can determine the total thickness of the support layer 120 and the outer membrane layer 130.

[0028] It is understandable that the functional element 140 can also be located in other positions, such as between the support layer 120 and the outer membrane layer 130. In this way, before peeling off the inner membrane layer 110, the thickness measuring device can determine the total thickness of the inner membrane layer 110 and the support layer 120; and after peeling off the inner membrane layer 110, the thickness measuring device can directly determine the thickness of the support layer 120.

[0029] In some embodiments, such as Figure 3 As shown, the functional body 140 includes: a first functional body 141, which is a magnetically conductive material; the first functional body 141 is used for the thickness measuring device to perform magnetic induction thickness measurement on at least one structural layer in the pipe lining 100; and / or, a second functional body 142, which is a conductive material; the second functional body 142 is used for the thickness measuring device to perform eddy current thickness measurement on at least one structural layer in the pipe lining 100.

[0030] In this invention, the functional body 140 may include at least one of a first functional body 141 and a second functional body 142. Specifically, the first functional body 141 is a magnetically conductive material, i.e., a material that can affect the distribution of the magnetic field, such as iron, cobalt, nickel, etc.; the second functional body 142 is a conductive material, such as aluminum, copper, 304 austenitic stainless steel, etc. In some embodiments, the second functional body 142 may be a non-magnetic conductive material.

[0031] Thus, the thickness measuring device can emit a magnetic field for the first functional body 141. This magnetic field is affected by the first functional body 141. Therefore, the thickness measuring device can use magnetic induction to obtain relevant parameters such as the magnetic flux, magnetic induction intensity, or coil impedance / inductance of the magnetic field affected by the first functional body 141. Based on these relevant parameters, the thickness of all structural layers located between the first functional body 141 and the thickness measuring device can be determined. For example, if the structural layer between the first functional body 141 and the thickness measuring device is thicker, the magnetic air gap of the magnetic field between the thickness measuring device and the first functional body 141 will be larger, the magnetic reluctance will be greater, and the inductance and equivalent impedance of the coil in the thickness measuring device will decrease. In other words, the thickness measuring device can obtain the thickness of the structural layer between the first functional body 141 and the thickness measuring device by obtaining the equivalent impedance / inductance of the coil and performing corresponding calculations. In other embodiments, a Hall element may also be provided in the thickness measuring device. The Hall element can directly sense the change in magnetic flux of the magnetic field and output a Hall voltage. Therefore, the thickness measuring device can perform corresponding calculations on the Hall voltage to finally obtain the thickness of the structural layer between the first functional body 141 and the thickness measuring device.

[0032] For the second functional body 142, the thickness measuring device can emit a magnetic field, which induces eddy currents in the second functional body 142. These eddy currents generate a reverse magnetic field, partially canceling the original magnetic field. Therefore, the impedance of the coil in the thickness measuring device changes. The thickness measuring device can then use the eddy current method to obtain relevant parameters such as the coil's impedance / inductance, and based on these parameters, determine the thickness of all structural layers between the second functional body 142 and the thickness measuring device. For example, if the structural layer between the second functional body 142 and the thickness measuring device is thicker, and the probe is farther from the second functional body 142, the eddy current effect is weaker, the reverse magnetic field generated by the eddy currents is weakened, the coil energy loss is reduced, and the coil impedance is reduced. In other words, the thickness measuring device obtains the equivalent impedance of the coil and performs corresponding calculations to ultimately obtain the thickness of the structural layer between the second functional body 142 and the thickness measuring device.

[0033] It is understandable that the projections of any two adjacent functional bodies 140 onto the radial direction of the pipe lining 100 do not overlap, thereby preventing interference during thickness measurement and affecting accuracy.

[0034] In some embodiments, the functional body 140 is a hard magnetic material, and the functional body 140 is used for the thickness measuring device to perform magnetic induction thickness measurement on at least one structural layer in the pipe lining 100.

[0035] In this invention, the functional body 140 can also be a hard magnetic material, meaning that the functional body 140 itself can emit a magnetic field. For example, the material of the functional body 140 includes, but is not limited to, permanent magnet ferrite, neodymium iron boron magnet, and AlNiCo magnet. Thus, the thickness measuring device only needs to be equipped with a detection coil or Hall element, without the need for excitation coils, permanent magnets, or other components used to emit a magnetic field.

[0036] In other words, the thickness measuring device can use magnetic induction to obtain relevant parameters such as the magnetic flux, magnetic induction intensity, or impedance / inductance of the detection coil of the magnetic field emitted by the functional body 140 of the hard magnetic material. Based on these parameters, it can then determine the thickness of all structural layers between the functional body 140 and the thickness measuring device. For example, the thicker the structural layer between the functional body 140 and the thickness measuring device, the larger the air gap in the magnetic circuit between them, resulting in greater magnetic reluctance and a decrease in the inductance and equivalent impedance of the coil in the thickness measuring device. Therefore, the thickness measuring device can obtain the thickness of the structural layer between the functional body 140 and the thickness measuring device by obtaining the equivalent impedance / inductance of the coil and performing corresponding calculations. In other embodiments, a Hall element can also be provided in the thickness measuring device. The Hall element can directly sense changes in the magnetic flux of the magnetic field and output a Hall voltage. Therefore, the thickness measuring device can perform corresponding calculations on the Hall voltage to ultimately obtain the thickness of the structural layer between the functional body 140 and the thickness measuring device.

[0037] In some embodiments, such as Figure 4 As shown, the functional body 140 is layered and is disposed on the outer surface of at least one of the support layer 120 and the outer membrane layer 130.

[0038] In this invention, the functional body 140, like the outer membrane layer 130 and the support layer 120, can be a layered structure and is located on the outer surface of at least one of the support layer 120 and the outer membrane layer 130. Thus, the functional body 140 has the largest coverage area, allowing the thickness measuring device to measure the thickness of the structural layers at any point within the pipe lining 100, thereby improving the convenience of the thickness measurement operation.

[0039] In some embodiments, such as Figure 5 As shown, the functional body 140 is strip-shaped, and multiple functional bodies 140 are arranged in an interlaced mesh pattern.

[0040] In this invention, the functional element 140 can be strip-shaped, allowing multiple functional elements to be spaced apart, with functional elements in different directions interlacing and forming a mesh-like distribution. For example, refer to... Figure 5The strip-shaped functional elements 140 can extend along the axial or radial direction of the lining. It is understood that, compared to layered functional elements 140, multiple functional elements 140 arranged in a mesh-like pattern have a smaller coverage area, saving material costs while still ensuring sufficient thickness measurement points for the pipe lining 100. It should be noted that the shape and distribution of the functional elements 140 can also be other suitable forms, without much restriction here. For example, the functional elements 140 can be circular, and multiple circular functional elements 140 can be arranged in multiple rows and columns.

[0041] In some embodiments, the pipe liner 100 is a photocurable liner, and the support layer 120 is made of glass fiber impregnated with photocurable resin. For example, the pipe liner 100 may be a photocurable CIPP liner, meaning the support layer 120 is a woven material impregnated with photocurable resin, such as glass fiber, glass fiber / polyester blend, etc.

[0042] In some embodiments, such as Figure 6 and Figure 7 As shown, the pipe liner 100 further includes: an ultraviolet light blocking film 150, which is disposed on the outside of the outer film layer 130; the functional body 140 is disposed between the ultraviolet light blocking film 150 and the outer film layer 130, or the functional body 140 is disposed on the outside of the ultraviolet light blocking film 150.

[0043] In this invention, since the pipe liner 100 is a photocurable CIPP liner, an anti-ultraviolet film 150 can also be provided on the outer side of the outer membrane layer 130 to prevent the photocurable resin in the support layer 120 from curing prematurely. Thus, referring to... Figure 6 The functional element 140 can be located between the UV-protective film 150 and the outer film layer 130. The thickness measuring device senses the magnetic field between itself and the functional element 140 and obtains magnetic field-related parameters, such as magnetic flux, magnetic induction intensity, induced electromotive force, coil impedance, and equivalent inductance, thereby determining the total thickness of the support layer 120 and the outer film layer 130 (or, if before photocuring, the total thickness of the inner film layer 110, support layer 120, and outer film layer 130). In other embodiments, refer to... Figure 7 The functional body 140 can be located outside the UV protection film 150. The thickness measuring device senses the magnetic field between itself and the functional body 140 and obtains magnetic field-related parameters, such as magnetic flux, magnetic induction intensity, induced electromotive force, coil impedance, and equivalent inductance, thereby determining the total thickness of the support layer 120, the outer film layer 130, and the UV protection film 150 (or, if before photocuring, the total thickness of the inner film layer 110, the support layer 120, the outer film layer 130, and the UV protection film 150).

[0044] In some embodiments, the pipe liner 100 is a thermosetting liner, and the support layer 120 is made of glass fiber impregnated with thermosetting resin. For example, the pipe liner 100 can be a hot water curing CIPP liner, a steam curing CIPP liner, etc., that is, the support layer 120 is a woven material impregnated with thermosetting resin, such as glass fiber material, glass fiber and polyester fiber blended material, etc.

[0045] In some embodiments, the material of the inner membrane layer 110 includes at least one selected from polyamide, polyethylene, polyurethane, polypropylene, and polyvinyl chloride; the material of the outer membrane layer 130 includes at least one selected from polyamide, polyethylene, polyurethane, polypropylene, and polyvinyl chloride. It should be noted that the inner membrane layer 110 and the outer membrane layer 130 can be either a single-layer structure or a multi-layer structure; the inner membrane layer 110 and the outer membrane layer 130 can also be any suitable material other than those described above, without further limitations.

[0046] In this invention, the functional element is positioned at any location outside the support layer, and it can interact with the thickness measuring device using a magnetic field. Thus, the thickness measuring device can sense the magnetic field between the two elements and obtain relevant parameters such as magnetic flux, magnetic induction intensity, induced electromotive force, and coil impedance, thereby determining the thickness of at least one structural layer in the pipe lining. This enables a comprehensive and accurate assessment of the pipe repair effect.

[0047] It should be noted that, depending on the implementation needs, the various components described in this invention can be divided into more components, or two or more components or parts of the operation of components can be combined into new components to achieve the purpose of this invention.

[0048] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A pipe lining, characterized in that, The pipe lining includes at least three structural layers arranged from the inside out: an inner membrane layer, a support layer, and an outer membrane layer, as well as one or more functional bodies disposed at any position outside the support layer; the functional bodies can form a magnetic field interaction with the thickness measuring device, enabling the thickness measuring device to determine the thickness of at least one of the structural layers in the pipe lining by sensing the magnetic field.

2. The pipe lining according to claim 1, characterized in that, The functional element is disposed on the outer side of the outer membrane layer; The functional unit is used to allow the thickness measuring device to determine the total thickness of the support layer and the outer film layer by sensing the magnetic field after the inner film layer is peeled off; or, The functional unit is used to enable the thickness measuring device to determine the total thickness of the inner film layer, the support layer and the outer film layer by sensing the magnetic field.

3. The pipe lining according to claim 1, characterized in that, The functional body includes: The first functional element is a magnetically conductive material; the first functional element is used for the thickness measuring device to perform magnetic induction thickness measurement on at least one structural layer in the pipe lining. And / or, The second functional body is a conductive material; the second functional body is used for the thickness measuring equipment to perform eddy current thickness measurement on at least one structural layer in the pipe lining.

4. The pipe lining according to claim 1, characterized in that, The functional body is a hard magnetic material, and the functional body is used for the thickness measuring equipment to perform magnetic induction thickness measurement on at least one structural layer in the pipe lining.

5. The pipe lining according to claim 1, characterized in that, The functional body is layered and disposed on the outer surface of at least one of the support layer and the outer membrane layer.

6. The pipe lining according to claim 1, characterized in that, The functional element is strip-shaped, and multiple functional elements are arranged in an interlaced mesh pattern.

7. The pipe lining according to claim 1, characterized in that, The pipe lining is a photocurable lining, and the support layer is made of glass fiber impregnated with photocurable resin.

8. The pipe lining according to claim 7, characterized in that, The pipe lining also includes: An anti-ultraviolet (UV) film, wherein the UV-protective film is disposed on the outer side of the outer film layer; The functional element is disposed between the UV protection film and the outer film layer, or the functional element is disposed on the outside of the UV protection film.

9. The pipe lining according to claim 1, characterized in that, The pipe lining is a thermosetting lining, and the support layer is made of glass fiber impregnated with thermosetting resin.

10. The pipe lining according to claim 1, characterized in that, The material of the inner membrane layer includes at least one of polyamide, polyethylene, polyurethane, polypropylene, and polyvinyl chloride; The material of the outer membrane layer includes at least one of polyamide, polyethylene, polyurethane, polypropylene, and polyvinyl chloride.

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