Optical cable laying structure using water conveyance tunnel
By burying pipelines inside water conveyance tunnels and using air-blowing to lay optical cables, the challenges of high elevation differences and long distances in optical cable laying at hydropower stations have been solved, achieving short-path, low-cost, and efficient optical cable laying.
Patent Information
- Application Number
- CN202423309072.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-12-02
- Estimated Expiration
- 2034-12-31
AI Technical Summary
The laying of optical cables in conventional hydropower and pumped storage power stations faces the challenges of high elevation differences and long distances. Traditional laying methods involve high investment, long construction periods, and easy damage to optical cables, especially when the terrain and power station layout are complex.
The water conveyance tunnel is used as the route for laying optical cables. The pipeline is buried in the concrete lining of the tunnel, and the optical cable is laid by air blowing. The water conveyance tunnel connects the reservoir and the factory, avoiding additional civil engineering excavation and concrete pouring.
This approach achieves shorter fiber optic cable laying paths, lower investment, faster construction, and less risk of fiber optic cable damage, thereby reducing construction costs and time, and improving laying efficiency.
Smart Images
Figure CN223624460U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of optical cable laying technology, and in particular to an optical cable laying structure utilizing a water conveyance tunnel. Background Technology
[0002] Optical cables (power cables, control cables, etc.) are the vital link ensuring the normal operation of various systems in conventional hydropower and pumped storage power stations. During the construction or maintenance of these stations, laying optical cables is a crucial step in achieving overall interconnectivity. Due to the large scale of conventional hydropower and pumped storage power stations and the significant elevation difference (typically 200–700 meters) between the power plant and the reservoir, laying optical cables usually requires overcoming the challenges of high elevation differences and long distances.
[0003] In various existing and under-construction conventional hydropower and pumped storage power stations, the three most common methods of fiber optic cable laying are direct burial, cable trench laying, and overhead line laying. Direct burial is rarely used in practice because it easily damages the fiber optic cable and is inconvenient for maintenance and replacement. Most projects use cable trench or overhead line laying methods, which have higher investment costs and longer construction periods. When the amount of fiber optic cable laid is small, the cost-effectiveness is extremely low, and regular maintenance is required during later operation. Therefore, the difficulty of laying long-distance fiber optic cables is further amplified by the terrain and the special layout of the power station. Utility Model Content
[0004] The technical problem to be solved by this utility model is: to provide a fiber optic cable laying structure that utilizes a water conveyance tunnel to address the above-mentioned problems.
[0005] The technical solution adopted in this utility model is: a fiber optic cable laying structure utilizing a water conveyance tunnel, wherein a water conveyance tunnel is provided between the reservoir and the power plant, comprising:
[0006] Multiple pipelines are buried within the concrete lining of the water conveyance tunnel;
[0007] Optical cables are laid within multiple of the aforementioned conduits.
[0008] Using the above-mentioned technical means, the water conveyance tunnel connecting the reservoir and the factory is used as the transportation medium. The pipeline is buried in the concrete lining of the water conveyance tunnel, and the optical cable is laid in the buried pipeline. This method has the advantages of short laying path, low investment, short construction period and easy damage to the buried pipeline.
[0009] In some embodiments, the pipeline is fitted with an HDPE sleeve.
[0010] In some embodiments, when the HDPE sleeve is pre-embedded, an angle steel bracket is used to fix the HDPE sleeve to the tunnel wall of the water conveyance tunnel, so that the HDPE sleeve pipeline is straight.
[0011] In some embodiments, the optical cable is laid in the conduit using an air-blowing method.
[0012] In some embodiments, after the pipeline is laid and fixed as a whole, the pipeline is filled with water for leak detection.
[0013] The beneficial effects of this utility model are:
[0014] 1. The pipeline is laid through a water conveyance tunnel connecting the reservoir and the factory. Optical cables are laid within the pipeline using an air-blowing method. Utilizing the space within the water conveyance tunnel itself, no additional civil engineering excavation or concrete structure pouring is required. Compared to traditional methods such as roadside cable trenches and overhead cables, this approach offers advantages such as shorter path, lower investment, shorter construction period, and faster optical cable laying. Furthermore, the concealed burial method minimizes the risk of damage to the optical cable after commissioning. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the longitudinal section of the optical cable laid along the water conveyance tunnel in this application.
[0016] Figure 2 This is a schematic diagram of the cross-sectional structure of the optical cable laid along the water conveyance tunnel in this application.
[0017] Explanation of reference numerals in the attached figures:
[0018] 1. Water inlet; 2. Water conveyance tunnel; 3. Plant; 4. Pipeline.
[0019] This specification includes references to "one embodiment" or "implementation". The use of the phrase "in one embodiment" or "in an embodiment" does not necessarily refer to the same embodiment. Specific features, structures, or characteristics may be combined in any suitable manner consistent with this disclosure.
[0020] The term "comprising" is open-ended. As used in the appended claims, it does not exclude additional structures or steps. Detailed Implementation
[0021] To enable those skilled in the art to better understand the present invention, the technical solution of the present invention will be further described below with reference to specific embodiments.
[0022] Example 1:
[0023] Combination Figure 1 and Figure 2As shown, this embodiment is a fiber optic cable laying structure utilizing a water conveyance tunnel. A water conveyance tunnel 2 is provided between the reservoir and the plant 3. This structure includes multiple pipes 4 and fiber optic cables. The multiple pipes 4 are buried within the concrete lining of the water conveyance tunnel 2. The pipes 4 are arranged from the inlet 1 of the water conveyance tunnel 2 to the plant 3. The multiple pipes 4 can be laid in parallel. After the pipe installation is completed, the fiber optic cable is laid in the multiple pipes 4 using an air-blowing method. Specifically, in this embodiment, the pipes 4 use HDPE sleeves.
[0024] In some implementation schemes, when the HDPE casing is pre-embedded, angle steel brackets are used to fix the HDPE casing to the tunnel wall of the water conveyance tunnel 2, so that the HDPE casing pipeline 4 is straight.
[0025] In some implementation schemes, after the pipeline 4 is laid and fixed as a whole, it is necessary to fill the pipeline 4 with water to check for leaks.
[0026] In this embodiment, the pipeline 4 is laid underground using concrete lining of the water conveyance tunnel 2, eliminating the need for additional civil engineering excavation or concrete pouring. The water conveyance tunnel 2 serves as a connecting channel between the reservoir and the plant 3, offering a shorter path compared to external highway connections, effectively saving on fiber optic cable investment. Furthermore, the underground laying of pipeline 4 reduces its susceptibility to damage. The air-blowing method for laying the fiber optic cable offers advantages such as mature technology and convenient construction.
[0027] Example 2:
[0028] This embodiment describes a construction method for laying optical cables using a water conveyance tunnel structure, including the following steps:
[0029] (1) Determine the diameter and quantity of HDPE conduits to be buried based on the number and type of optical cables to be laid.
[0030] (2) Determine the HDPE casing laying path and pipeline 4 length based on the water conveyance tunnel 2 path, and consider a certain number of spare pipelines 4.
[0031] (3) After the water conveyance tunnel 2 is excavated, HDPE sleeves are pre-embedded before the lining construction. Angle steel brackets are used to fix the HDPE sleeves to the tunnel wall in sequence to ensure that the pipeline 4 is straight.
[0032] (4) If the path of water conveyance tunnel 2 is longer than the length of a single roll of HDPE pipe, a special intermediate joint can be used to continue the pipeline 4.
[0033] (5) After the pipeline 4 is laid and fixed as a whole, before the lining concrete is poured, the pipeline 4 is filled with water for leak detection (maintaining a pressure of about 5 to 9 MPa) to ensure that the pipeline 4 is not damaged and the joints are well sealed.
[0034] (6) After the lining concrete is poured, drain the water from pipe 4 and use the air blowing method to lay the optical cable to complete the optical cable laying construction.
[0035] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.
Claims
1. A fiber optic cable laying structure utilizing a water conveyance tunnel, characterized in that, A water conveyance tunnel (2) is provided between the reservoir and the power plant (3), including: Multiple pipelines (4) are buried in the concrete lining of the water conveyance tunnel (2); Optical cables are laid in multiple of the aforementioned conduits (4).
2. The optical cable laying structure utilizing a water conveyance tunnel according to claim 1, characterized in that: The pipeline (4) uses HDPE sleeve.
3. The optical cable laying structure utilizing a water conveyance tunnel according to claim 2, characterized in that: When the HDPE sleeve is pre-embedded, an angle steel bracket is used to fix the HDPE sleeve to the tunnel wall of the water conveyance tunnel (2), so that the pipeline (4) of the HDPE sleeve is straight.
4. The optical cable laying structure utilizing a water conveyance tunnel according to claim 1, characterized in that: The optical cable is laid in the pipeline (4) using the air blowing method.
5. The optical cable laying structure utilizing a water conveyance tunnel according to claim 1, characterized in that: After the pipeline (4) is laid and fixed as a whole, the pipeline (4) is filled with water for leak detection.