Anti-scour device for cable

Abstract

The invention provides a cable anti-scour device which comprises a shell, a pile foundation is wrapped with the shell, and the surface of the shell is uneven so that the friction force of the contact surface of the shell and a soil layer can be increased; the cable protection sleeve wraps the cable, and the cable protection sleeve is connected with the cable hole of the pile foundation; the flow reduction module comprises blades and protection units, and the protection units are arranged on the multiple side faces of the blades so as to block washed silt; wherein the cable protection sleeve wraps a cable and is arranged in a soil layer, when seawater scours the cable protection sleeve out of the soil layer, the cable protection sleeve drives the cable to be arranged in the soil layer, and the flow reduction modules are arranged on the two sides of the cable, so that the speed of water flowing to the cable is reduced. The device is simple in structure and low in cost, can solve the problem of cable faults caused by the fact that the cable is scoured under the high-flow-speed environmental condition, and avoids cable replacement and power generation loss caused by cable damage of a wind power plant.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore power generation cable equipment, and more specifically, to a cable anti-scouring device. Background Art

[0002] With the booming development of offshore wind power, wind turbine sites with good environmental conditions are becoming increasingly scarce. As the distance from the shore increases, the flow velocity at the wind turbine site is becoming more and more common. Many wind farm cables are often damaged and need to be replaced. Each time the cable is replaced, the construction cost and power generation loss range from tens of millions to hundreds of millions. Therefore, how to effectively and cost-effectively reduce the damage caused by scouring of cables is one of the key factors to increase the revenue of wind farms.

[0003] The present invention aims to propose a new cable anti-scouring design, which can effectively and permanently solve the problem of cable failure caused by scouring in high-velocity environmental conditions with low cost, avoid the replacement of cables and power generation losses caused by cable damage in wind farms, and improve the profits of wind farms. Summary of the invention

[0004] The present invention provides a cable anti-scouring device, which aims to solve the problem of cable failure caused by scouring of the cable under high flow velocity and improve the anti-scouring ability of the cable.

[0005] To achieve the above object, the present invention provides a cable anti-scouring device, comprising:

[0006] An outer shell is wrapped on the pile foundation, and the outer shell has an uneven surface to increase the friction between the outer shell and the soil layer;

[0007] A cable protective sleeve, wherein the cable protective sleeve wraps the cable and is connected to a cable hole of the pile foundation;

[0008] A flow reduction module, the flow reduction module comprising blades and protection units, the protection units being arranged on multiple sides of the blades to block the washed mud and sand;

[0009] The cable protective cover wraps the cable and is placed in the soil layer. When the seawater washes the cable protective cover out of the soil layer, the cable protective cover drives the cable to be placed in the soil layer. The flow reduction module is placed on both sides of the cable to reduce the water flow speed flowing to the cable.

[0010] In one embodiment, the surface of the shell is in the shape of a tortoise shell with concave and convex surfaces connected to each other.

[0011] In one embodiment, the surface of the shell is in a pattern of concave and convex surfaces.

[0012] In one embodiment, the protection unit comprises parallel circular plates, and the blades are arranged between the parallel circular plates.

[0013] In one embodiment, the protection unit further comprises a fixing plate, and the fixing plate is arranged on a side of the current reducing module away from the cable.

[0014] In one embodiment, a fixing pile is provided at the bottom of the flow reduction module, and the fixing pile is fixed below the parallel circular plates.

[0015] In one embodiment, the fixing pile includes a supporting unit and a fixing unit, the supporting unit supports the fixing unit, and the fixing unit is connected to the protection unit.

[0016] In one embodiment, a plurality of flow reduction modules are provided.

[0017] In one embodiment, the cable protective cover is provided with a single-sided cable protective cover or a double-sided cable protective cover, wherein the single-sided cable protective cover is provided above the cable, and the double-sided cable protective cover wraps the cable in all directions.

[0018] In one embodiment, the double-sided cable protective cover is provided with a fixer, and the fixer fixes the cable in the double-sided cable protective cover.

[0019] The present invention has the following beneficial effects:

[0020] 1. Strong anti-scouring ability: The present invention protects the cable by providing an uneven outer shell for the pile foundation, a circular cable protection sleeve and a flow reduction module. These three modules jointly protect the cable from being damaged or removing the soil layer due to the scouring of seawater.

[0021] 2. Simple structure: The structural design of the present invention is extremely simple and clear. It abandons cumbersome and complex structural elements and can be easily manufactured by using common and easily available fixing methods. The entire production process is simple and smooth, and no additional complex engineering area is required for cumbersome assembly operations.

[0022] 3. Low cost: The present invention can select materials that are easy to purchase and have stable and reliable performance to meet the various functional requirements of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic structural diagram of a cable anti-scouring device according to an embodiment of the present invention;

[0024] Figure 2 A schematic diagram of a housing structure of a cable anti-scour device according to an embodiment of the present invention;

[0025] Figure 3 A schematic structural diagram of a current reducing module of a cable anti-scour device according to an embodiment of the present invention;

[0026] Figure 4 A schematic diagram of the local disturbance flow field and scour pattern around a pile foundation in an embodiment of the present invention.

[0027] Among them, 100 is the shell; 200 is the cable protective cover; 210 is the fixer; 300 is the flow reduction module; 310 is the parallel circular plate; 320 is the blade; 330 is the fixing plate; 340 is the fixing unit; 350 is the supporting unit; and 400 is the cable hole of the pile foundation. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the implementation of this application clearer, the technical scheme in the embodiment of this application will be described in more detail below in conjunction with the drawings in the embodiment of this application. In the drawings, the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions. The described embodiments are part of the embodiments of this application, not all of them. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain this application, and should not be construed as limitations on this application. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0029] Figure 1 The present invention is a schematic diagram of a cable anti-scouring device according to an embodiment of the present invention, wherein the cable anti-scouring device comprises:

[0030] The outer shell 100 is wrapped on the pile foundation, and the surface of the outer shell 100 is uneven to increase the friction between the outer shell 100 and the soil layer;

[0031] A cable protective cover 200, wherein the cable protective cover 200 wraps the cable, and the cable protective cover 200 is connected to a cable hole 400 of the pile foundation;

[0032] A flow reduction module 300, wherein the flow reduction module 300 includes a blade 320 and a protection unit, wherein the protection unit is disposed on multiple sides of the blade 320 to block the silt washed in;

[0033] Among them, the cable protective cover 200 wraps the cable and is placed in the soil layer. When the seawater washes the cable protective cover 200 out of the soil layer, the cable protective cover 200 drives the cable to be placed in the soil layer. The flow reduction module 300 is placed on both sides of the cable to reduce the water flow speed flowing to the cable.

[0034] Figure 4The figure is a schematic diagram of the local disturbance flow field and scouring pattern near the pile foundation, from which it can be seen that the pile foundation is affected by various disturbances. The uneven shell 100 is wrapped on the pile foundation. When various disturbances are scoured onto the uneven shell 100, the intensity of various disturbances can be reduced, effectively reducing the horseshoe vortex and wake vortex, reducing the local scouring intensity, and ensuring the safety of the overall cable device.

[0035] In one embodiment, Figure 2 As shown, the surface of the housing 100 is in a tortoise shell pattern with concave and convex surfaces connected to each other.

[0036] In one embodiment, the surface of the housing 100 is in a pattern of concave and convex surfaces.

[0037] Specifically, the concave-convex housing 100 can be in various shapes, and the concave-convex housing 100 can be designed into various shapes and styles, from simple geometric shapes, such as circle, square, triangle, etc., to complex natural forms, such as bionic animal shapes, plant textures, etc.

[0038] In one embodiment, Figure 3 As shown, the protection unit includes parallel circular plates 310 , and the blades 320 are arranged between the parallel circular plates 310 .

[0039] Specifically, the parallel circular plates 310 can block the scouring of mud and sand from two sides of the flow reduction module 300 , thereby preventing the mud and sand from interfering with the operation of the blades 320 .

[0040] In one embodiment, the protection unit further includes a fixing plate 330 , and the fixing plate 330 is disposed on a side of the current reducing module 300 away from the cable.

[0041] Specifically, the fixing plate 330 can fix the parallel circular plate 310 on one hand, and on the other hand, the fixing plate 330 can block the mud and sand rushing from one side of the flow reduction module 300 to ensure the normal rotation of the blade 320.

[0042] In one embodiment, a fixing pile is disposed at the bottom of the flow reduction module 300 , and the fixing pile is fixed below the parallel circular plate 310 .

[0043] Specifically, the fixing piles are used to fix the flow reduction module 300 and fix the flow reduction module 300 in the soil layer.

[0044] In one embodiment, the current reducing module 300 is provided with a fixing plate 330 on a side away from the cable, and the fixing plate 330, or the parallel circular plates 310, or the fixing plate 330 and the parallel circular plates 310 are connected to the fixing piles.

[0045] In one embodiment, the fixing pile includes a supporting unit 350 and a fixing unit 340 , wherein the supporting unit 350 supports the fixing unit 340 , and the fixing unit 340 is connected to the protection unit.

[0046] Specifically, the fixing unit 340 is connected to the fixing plate 330 , or to the parallel circular plate 310 , or to the fixing plate 330 and the parallel circular plate 310 .

[0047] Exemplarily, the support unit 350 uses a four-legged support column, or two parallel support columns, or multiple support columns can be selected according to needs.

[0048] Further, part or all of the supporting unit 350 is placed below the fixing unit 340 .

[0049] In one embodiment, a plurality of flow reduction modules 300 are provided.

[0050] Specifically, the flow reduction modules 300 are dispersedly placed on both sides of the cable. The flow reduction modules 300 are simple in design, and when the flow reduction modules 300 are damaged by being washed, they can be quickly repaired or replaced.

[0051] In one embodiment, the cable protective cover 200 is provided with a single-sided cable protective cover 200 or a double-sided cable protective cover 200, wherein the single-sided cable protective cover 200 is provided above the cable, and the double-sided cable protective cover 200 wraps the cable in all directions.

[0052] Specifically, the cable protective cover 200 is designed to be circular so as to better fit the cable when buried in the soil layer, rather than simply preventing protection on the layer.

[0053] Furthermore, the cable protective cover 200 may be made of a material with a large volume density so that the cable is pressed into the soil layer under the gravity of the cable protective cover 200 .

[0054] Furthermore, when the upper end of the cable protective cover 200 is exposed from the soil layer due to scouring, the overall protective device can still protect the cable because the circular design can divert water, allowing the flowing water to press the anti-scouring device into the soil again, preventing the entire device from detaching from the soil.

[0055] In one embodiment, the double-sided cable protective cover 200 is provided with a fixer 210 , and the fixer 210 fixes the cable in the double-sided cable protective cover 200 .

[0056] Furthermore, in the cable anti-scouring device, the outer shell 100 and the cable protective cover 200 for protecting the cable need to have good wear resistance, corrosion resistance, impact resistance, and certain flexibility and strength to adapt to complex and changing environmental conditions. The following are some materials for the outer shell 100 that can be selected:

[0057] Stainless steel: Stainless steel, especially 316L stainless steel, has excellent corrosion resistance and heat resistance, and high mechanical strength, and can withstand large external impact. It can be used in harsh environments such as ocean and chemical industry, and can effectively protect cables from corrosion and erosion.

[0058] Polyurethane (PUR / TPU): Polyurethane material has excellent wear resistance, oil resistance, and aging resistance, and has good elasticity, high transparency, and is easy to process and shape. It can be used for cable protection that requires high wear resistance.

[0059] Chlorinated Polyethylene (CPE): CPE material has the characteristics of light weight, hardness, low friction coefficient, good oil resistance, good water resistance, chemical resistance and excellent UV resistance. It can be used for cable protection in very harsh environments, such as strong corrosion, high temperature, high humidity and other conditions.

[0060] Ceramic silicone rubber: Ceramic silicone rubber has excellent fire resistance, flame retardancy, low smoke, non-toxicity and other characteristics. The residue after combustion is a hard ceramic shell that does not melt or drip. It can be used in places that require high fire protection, such as nuclear power plants, large data centers, etc.

[0061] Polyethylene (PE): Polyethylene, especially cross-linked polyethylene (XLPE), has excellent electrical properties and extremely high insulation resistance, as well as good moisture resistance and strong deformation resistance. It is mainly used for the insulation layer and sheath layer of wires and cables, but can also be used as the shell 100 material in some anti-scour devices.

[0062] In summary, when selecting the material of the outer shell 100 for protecting the cable in the cable anti-scour device, comprehensive consideration should be given to the specific application environment, performance requirements and cost budget. The outer shell 100 of different materials has its own advantages and disadvantages, and selecting the appropriate material is crucial to ensure the safe and stable operation of the cable.

[0063] The present invention has the following beneficial effects:

[0064] 1. Strong anti-scouring ability: The present invention protects the cable by providing an uneven outer shell for the pile foundation, a circular cable protection sleeve and a flow reduction module. These three modules jointly protect the cable from being damaged or removing the soil layer due to the scouring of seawater.

[0065] 2. Simple structure: The structural design of the present invention is extremely simple and clear. It abandons cumbersome and complex structural elements and can be easily manufactured by using common and easily available fixing methods. The entire production process is simple and smooth, and no additional complex engineering area is required for cumbersome assembly operations.

[0066] 3. Low cost: The present invention can select materials that are easy to purchase and have stable and reliable performance to meet the various functional requirements of the present invention.

[0067] In the description of the present application, it should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0068] It should be noted that, in the present application, the terms "comprises", "includes" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. It should also be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved. For example, the described method may be performed in an order different from that described, and various steps may be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0069] In addition, it should be noted that, unless otherwise clearly specified and limited, words such as "connect" and "drive" used in the description of this application should be understood in a broad sense, which can be direct, through an intermediate medium, or the relationship between two elements. Technical personnel in the field can understand their specific meanings in this application based on the specific circumstances.

[0070] The above embodiments are provided for persons familiar with the art to implement or use the present application. Personnel familiar with the art can make various modifications or changes to the above embodiments without departing from the application concept of the present application. Therefore, the protection scope of the present application is not limited to the above embodiments, but should be the maximum scope of the innovative features mentioned in the claims.

Claims

1. A cable anti-scouring device, characterized in that: The cable anti-scouring device comprises: An outer shell is wrapped on the pile foundation, and the outer shell has an uneven surface to increase the friction between the outer shell and the soil layer; A cable protective sleeve, wherein the cable protective sleeve wraps the cable and is connected to a cable hole of the pile foundation; A flow reduction module, the flow reduction module comprising blades and protection units, the protection units being arranged on multiple sides of the blades to block the washed mud and sand; The cable protective cover wraps the cable and is placed in the soil layer. When the seawater washes the cable protective cover out of the soil layer, the cable protective cover drives the cable to be placed in the soil layer. The flow reduction module is placed on both sides of the cable to reduce the water flow speed flowing to the cable.

2. The cable anti-scouring device according to claim 1, characterized in that: The surface of the shell is in the shape of a tortoise shell with concave and convex patterns.

3. The cable anti-scouring device according to claim 1, characterized in that: The surface of the shell is in a pattern of concave and convex portions connected to each other.

4. The cable anti-scouring device according to claim 1, characterized in that: The protection unit comprises parallel circular plates, and the blades are arranged between the parallel circular plates.

5. The cable anti-scouring device according to claim 4, characterized in that: The protection unit further comprises a fixing plate, and the fixing plate is arranged on a side of the current reducing module away from the cable.

6. The cable anti-scouring device according to claim 5, characterized in that: A fixing pile is arranged at the bottom of the flow reduction module, and the fixing pile is fixed below the parallel circular plates.

7. The cable anti-scouring device according to claim 6, characterized in that: The fixing pile includes a supporting unit and a fixing unit, wherein the supporting unit supports the fixing unit, and the fixing unit is connected to the protection unit.

8. The cable anti-scouring device according to claim 1, characterized in that: The flow reduction modules are provided in plurality.

9. The cable anti-scouring device according to claim 1, characterized in that: The cable protective cover is provided with a single-sided cable protective cover or a double-sided cable protective cover, wherein the single-sided cable protective cover is provided above the cable, and the double-sided cable protective cover wraps the cable in all directions.

10. The cable anti-scouring device according to claim 9, characterized in that: The double-sided cable protective cover is provided with a fixer, and the fixer fixes the cable in the double-sided cable protective cover.

Images