A UV-CIPP drainage liner hose with a permanent inner lining

Abstract

This utility model relates to the field of trenchless drainage pipeline repair technology, specifically a UV-CIPP drainage liner hose with a permanent inner membrane. From the outside to the inside, it includes an outer membrane layer, an outer felt, and an inner liner composite layer. The inner liner composite layer contains a permanent inner membrane layer to increase the pressure-bearing capacity of pressurized drainage pipelines, increase the thickness of the wear layer, and improve flow capacity. This utility model eliminates the need for membrane removal, ensuring the integrity of the liner and shortening construction time. This utility model can withstand a pressure of at least 0.4 MPa, meeting the pressure requirements of pressurized drainage pipelines. The permanent inner membrane layer in this utility model has a certain pressure resistance and a smooth contact surface with water, reducing the probability of scale, silt, and contaminant / debris accumulation in the pipeline, and improving the flow capacity of the repaired pipeline.

Description

Technical Field

[0001] This utility model relates to the field of trenchless drainage pipeline repair technology, specifically a UV-CIPP drainage lining hose with a permanent inner membrane. Background Technology

[0002] The repair of underground pipelines is often constrained by complex environmental factors such as geographical environment, traffic conditions, the intersection of underground pipelines, and space limitations imposed by the foundations of surrounding buildings and underground structures, making traditional excavation repair methods difficult to implement. Trenchless repair technology, due to its characteristics of not requiring excavation, short construction period, and minimal environmental impact, has become the preferred solution for urban underground pipeline network repair.

[0003] UV-CIPP technology is a typical trenchless remediation technology. Its core technology lies in using ultraviolet light to catalyze resin curing to form a high-strength inner liner. Existing technologies typically consist of a three-layer structure: an outer UV-protective film, a middle composite liner containing reinforcing materials and resin, and an inner, peelable temporary PE liner. During construction, a flexible hose is inserted into the old pipe by pulling or flipping it. After curing under UV light (wavelength 365-420nm), the inner liner is manually removed. This process has significant technical bottlenecks: 1. The inner liner removal process is time-consuming and easily removes some structural layers, causing damage to the liner interface; 2. The temporary inner liner is prone to wrinkling during curing in complex pipe sections. These shortcomings severely restrict the further promotion and application of UV-CIPP technology in trenchless remediation.

[0004] Based on the above, this utility model proposes a UV-CIPP drainage liner hose with a permanent inner membrane, which can effectively solve one or more of the above problems. Summary of the Invention

[0005] To solve the above-mentioned technical problems, this utility model proposes a UV-CIPP drainage liner hose with a permanent inner membrane.

[0006] The technical problem to be solved by this utility model is achieved by the following technical solution: A UV-CIPP drainage liner hose with a permanent inner membrane includes, from the outside to the inside, an outer membrane layer, an outer felt, and an inner liner composite layer. The inner liner composite layer is provided with a permanent inner membrane layer to increase the pressure bearing capacity of the pressurized drainage pipe, increase the thickness of the pipe wear layer, and improve the flow capacity.

[0007] As a further improvement of this utility model, the thickness of the permanent inner membrane layer is 0.5 mm.

[0008] As a further improvement of this utility model, the inner lining composite layer includes a glass fiber layer and a resin containing a photoinitiator.

[0009] As a further improvement of this utility model, the thickness of the glass fiber layer in the inner lining composite layer is 1.1-1.5mm.

[0010] As a further improvement of this utility model, the thickness of the outer felt is 0.25-0.28 mm.

[0011] As a further improvement of this utility model, the thickness of the outer film layer is 0.2 mm.

[0012] The beneficial effects of this utility model are: (1) This utility model eliminates the film-tearing step, ensuring the integrity of the lining and shortening the construction time; (2) This utility model can withstand a pressure of at least 0.4 MPa, which meets the pressure requirements in pressurized drainage pipes; (3) The permanent inner membrane layer in this utility model has a certain pressure resistance and a smooth contact surface with water, which reduces the probability of scale, silt, pollutants / debris accumulation in the pipe and improves the flow capacity of the repaired pipe. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the front structure of this utility model; Figure 3 This is a side view of the structure of this utility model.

[0014] In the diagram: 1. Permanent inner membrane layer; 2. Inner lining composite layer; 3. Outer felt; 4. Outer membrane layer. Detailed Implementation

[0015] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0016] like Figures 1 to 3 As shown, a UV-CIPP drainage liner hose with a permanent inner membrane includes, from the outside to the inside, an outer membrane layer 4, an outer felt 3, and an inner liner composite layer 2. The outer membrane layer 4 is welded over the outer felt 3, firmly covering the outer felt 3.

[0017] The outer film layer 4 is a yellow film, which is a UV-protective film layer to prevent resin curing before construction. In this embodiment, the thickness of the outer film layer 4 is 0.2 mm. The outer felt 3 is welded to firmly cover the inner lining composite layer 2. The outer felt 3 is used to prevent resin seepage. In this embodiment, the thickness of the outer felt 3 is 0.25-0.28 mm.

[0018] The inner lining composite layer 2 has a permanent inner membrane layer 1 inside. The inner lining composite layer 2 is laid on the permanent inner membrane layer 1 by stitching or overlapping. The inner lining composite layer 2 is a structural layer of glass fiber layer and resin containing photoinitiator. In this embodiment, the thickness of the glass fiber layer in the inner lining composite layer 2 is 1.1-1.5 mm, and the thickness of the entire inner lining composite layer 2 is determined according to the design.

[0019] In this embodiment, the thickness of the permanent inner membrane layer 1 is 0.5 mm, and the permanent inner membrane layer 1 is formed by welding sheet membranes into a cylindrical membrane. The addition of the permanent inner membrane layer 1 to the drainage lining hose enables it to withstand a pressure of at least 0.4 MPa, meeting the pressure requirements of pressurized drainage pipelines. This reduces the risk of damage to the hose structure layer by the curing equipment during construction and curing. Furthermore, the increased thickness of the pipe wear layer and the smooth water contact surface reduce the probability of scale, silt, and contaminant / debris accumulation within the pipe, improving the flow capacity of the repaired pipe.

[0020] Specifically, in this embodiment, the permanent inner membrane layer 1 includes polyester felt and PE film, but can also be replaced by other felt types and membrane materials such as PE / PA / PVC / PP, all of which should be included in the protection scope of this utility model.

[0021] In this invention, the permanent inner membrane layer 1 is formed by welding sheet membranes into a cylindrical membrane corresponding to the pipe diameter; the permanent inner membrane layer 1 is wrapped with an inner lining composite layer 2, which is laid on the permanent inner membrane layer 1 by stitching or overlapping; the outer felt 3 is firmly wrapped around the inner lining composite layer 2 by welding; the outer membrane layer 4 provides UV protection, and the implementation method is similar to that of the outer felt 3, also using welding to wrap the internal layers.

[0022] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A UV-CIPP drainage liner hose with a permanent inner lining, characterized in that: From the outside to the inside, it includes an outer membrane layer (4), an outer felt (3), and an inner lining composite layer (2). The inner lining composite layer (2) is provided with a permanent inner membrane layer (1) for increasing the pressure bearing capacity of the pressurized drainage pipe, increasing the thickness of the pipe wear layer, and improving the flow capacity.

2. The UV-CIPP drainage liner hose with a permanent inner membrane according to claim 1, characterized in that: The thickness of the permanent inner membrane layer (1) is 0.5 mm.

3. The UV-CIPP drainage liner hose with a permanent inner lining according to claim 1, characterized in that: The inner lining composite layer (2) includes a glass fiber layer and a resin containing a photoinitiator.

4. The UV-CIPP drainage liner hose with a permanent inner membrane according to claim 1, characterized in that: The thickness of the glass fiber layer in the inner lining composite layer (2) is 1.1-1.5 mm.

5. The UV-CIPP drainage liner hose with a permanent inner membrane according to claim 1, characterized in that: The thickness of the outer felt (3) is 0.25-0.28 mm.

6. The UV-CIPP drainage liner hose with a permanent inner membrane according to claim 1, characterized in that: The thickness of the outer membrane layer (4) is 0.2 mm.

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