Large tidal energy power generation device and its assembly platform

Abstract

The present invention provides a large-scale tidal current power generation device and its assembly platform, in which at least one horizontal axis hydro-turbine generator is installed, and the assembly platform includes a bracket, at least four fixed piles, at least two nested pieces and at least two force-bearing support pieces. The fixed piles are connected into one by the bracket and surround to form an installation space, and the generator is installed in the installation space. One end of each fixed pile is piled and fixed to the seabed, and the other end extends above the water surface. At least four fixed piles are arranged in two columns along the direction of water flow, wherein at least two fixed piles in each column are arranged in sequence along the direction of water flow and at least one of the fixed piles is used as a main load-bearing pile. At least two nested pieces are detachably sleeved on the main load-bearing piles on the left and right sides of the generator. One end of at least two force-bearing support pieces is respectively installed on the left and right sides of the horizontal axis hydro-turbine along the direction of water flow, and the other end is respectively installed with nested pieces to resist the impact force of water flow on the horizontal axis hydro-turbine generator.

Description

Technical Field

[0001] The invention belongs to the field of tidal energy power generation, and in particular relates to a large-scale tidal energy power generation device and an assembly platform thereof. Background Art

[0002] Ocean energy (including tidal energy, wave energy, temperature difference energy, salinity difference energy, ocean current energy, etc.) is a clean and pollution-free renewable energy source with abundant reserves and wide distribution, and has excellent development prospects and value. Today, energy is increasingly scarce, the greenhouse effect is becoming increasingly serious, and energy needs to be low-carbon, so clean energy such as wind energy and ocean energy is the future direction of energy development. However, now these clean energy power generation equipment, except for the relatively mature use of wind energy, the use of ocean energy is still in its infancy. There is no universal and mature equipment, and the power generation power is lower than that of other energy sources. Most importantly, the existing ocean energy power generation devices are much higher than the cost of other energy generation in terms of manufacturing cost, installation cost and maintenance cost, which has become the biggest obstacle to the commercial application and promotion of ocean energy power generation devices.

[0003] At present, the wind power generation device that uses offshore wind power to generate electricity can achieve a maximum installed power of 5MW per unit. It is to fix a tower on the seabed, and then fix the wind turbine on the top of the tower and above the sea surface to collect wind energy for power generation. The diameter of the bottom of the tower is 6.242m, the diameter of the top is 4.170m, the average tower diameter is 5.206m, and the entire tower is 96m high. In other words, in order to achieve a single-unit installed power of 5MW, a tower of nearly 100m high is required, and the maximum diameter must be greater than 6m to be able to carry a generator of this power. Such a tower weighs 439 tons, and the cost of construction and installation is not cheap. Because of the high cost, it cannot be converted into real economic value. Even if you want to use it on a large scale, you will be discouraged by the high cost.

[0004] With wind power generation, even if the diameter of the entire impeller is 230m, the power generation is only 12MW, but the corresponding tower height needs to be 195m (the lowest end of the blade needs to be 30m above the ground, and the impeller radius is 165m). However, with tidal energy for power generation, the blade diameter only needs to be 70m, and theoretically, 30MW of power generation can be achieved, and the pile height only needs to be 40m (the blade is 5m above the ground, and the impeller radius is 35m). Therefore, compared with offshore wind power generation, tidal energy power generation greatly reduces the tower height and reduces costs, and the power generation efficiency of tidal energy power generation will be much higher than that of offshore wind power generation.

[0005] Traditional tidal power generation devices usually adopt two fixing methods. One is floating fixing, that is, floating in the sea through a floating bed and fixed to the seabed or two banks through steel cables. The other is seabed fixing, that is, directly fixed to the seabed through a fixed pile. Since floating fixing still mainly uses wave energy to generate electricity, the power generation capacity is not high compared with deep tidal energy, and the scale of the generator that can be suspended is very small, so the economic value is small and gradually abandoned in practical applications. The second seabed fixing is the fixing method used by existing tidal power generation devices to be truly put into practical application.

[0006] At present, the maximum single-unit installed power of the power generation module that is actually put into use in the existing tidal power generation device is 2MW. So far, there has been no successful implementation of a single-unit installed power exceeding 2MW in the world. Limited by the scale of single-unit generator sets, most tidal power generation devices are extremely expensive and cannot be truly put into commercial use, so they cannot generate commercial value. Specifically, traditional tidal power generation devices are similar to offshore wind power generation devices and are also directly fixed to the seabed through a fixed pile. Due to the huge impact force of seawater, the fixed pile must have a large enough diameter to resist the bending moment. The larger the diameter of the fixed pile, the higher the pile driving cost. The fixed pile of a specific diameter has an upper limit on its bearing capacity, so it can only carry horizontal axis turbine generators within a certain scale. The fixed pile cannot be unlimitedly enlarged from both the cost and technical perspectives, which also makes it impossible to break through the installed power of a single horizontal axis turbine generator. Summary of the invention

[0007] In order to overcome at least one deficiency in the prior art, the present invention provides a large-scale tidal energy power generation device and an assembly platform thereof.

[0008] In a first aspect, the present invention provides an assembly platform of a large tidal current energy power generation device, in which at least one horizontal axis hydro-turbine generator is installed. The assembly platform of the large tidal current energy power generation device includes a bracket, at least four fixed piles, at least two nested pieces, and at least two force-bearing support pieces. At least four fixed piles are connected as a whole by the bracket and surround to form an installation space, at least one horizontal axis hydro-turbine generator is installed in the installation space, one end of each fixed pile is piled and fixed on the seabed, and the other end extends above the water surface, at least four fixed piles are arranged in two left and right rows along the direction of water flow, wherein at least two fixed piles in each row are arranged in sequence along the direction of water flow, and at least one fixed pile in each row of at least two fixed piles is used as a main load pile. At least two nested pieces are respectively detachably sleeved on the main load piles on the left and right sides of the horizontal axis hydro-turbine generator and are located below the water surface. One end of at least two force-bearing support pieces is respectively installed on the left and right sides of the horizontal axis hydro-turbine along the direction of water flow, and the other end is respectively installed with nested pieces to resist the impact force of water flow on the horizontal axis hydro-turbine generator.

[0009] In one embodiment of the first aspect of the present invention, the assembly platform also includes at least two groups of fence guide grooves for installing or fixing fences, which are respectively arranged on the upstream and downstream sides of the horizontal-axis hydro-generator, and each group of fence guide grooves extends from above the water surface to below the water surface.

[0010] In one embodiment of the first aspect of the present invention, the assembly platform also includes at least one manhole, one end of which leads to above the water surface and the other end leads to below the water surface, so that people can reach below the water surface to install and fix the main piles and nesting parts.

[0011] In one embodiment of the first aspect of the present invention, the assembly platform also includes at least one blower and a ventilation duct. The ventilation duct can be fixedly or detachably arranged along the inside or outside of the passage. The ventilation duct extends from above the water surface to below the water surface to enable air exchange in the working area under the water surface.

[0012] In one embodiment of the first aspect of the present invention, the assembly platform also includes at least one water pump and at least one drain pipe. The drain pipe can be fixedly or detachably arranged along the inside or outside of the through pipe. The drain pipe extends from above the water surface to below the water surface. The water pump draws accumulated water in the working area below the water surface and discharges it above the water surface through the drain pipe.

[0013] In one embodiment of the first aspect of the present invention, the lower part of the main pile is poured with concrete, and the upper part is hollow, so that people can reach below the water surface through the main pile to install and fix the main pile and the nesting piece.

[0014] In one embodiment of the first aspect of the present invention, the assembly platform also includes at least one suspension support column, which is a closed hollow structure. One end of the suspension support column is connected to the horizontal-axis hydro-turbine generator, so that personnel can enter the interior of the horizontal-axis hydro-turbine generator through the suspension support column, and the other end of the suspension support column leads to above the water surface.

[0015] In an embodiment of the first aspect of the present invention, the assembly platform further includes a sealing device and a fixing component, the fixing component fixes the main pile and the nesting member, and the sealing device is correspondingly arranged at the fixing component.

[0016] In an embodiment of the first aspect of the present invention, the assembly platform further includes at least two shock absorbing devices, each of which is disposed between the nesting member and the main supporting pile.

[0017] In an embodiment of the first aspect of the present invention, a side plate is provided on a side of each row of fixing piles facing the horizontal-axis hydro-generator.

[0018] In a second aspect, the present invention further provides a large-scale tidal current power generation device, comprising an assembly platform as described in any embodiment of the first aspect, at least one horizontal-axis hydro-turbine generator, and at least one suspension support column. At least one horizontal-axis hydro-turbine generator can be detachably installed in the assembly platform. At least one suspension support column is a closed hollow structure, one end of the suspension support column is connected to the horizontal-axis hydro-turbine generator, so that personnel can enter the interior of the horizontal-axis hydro-turbine generator through the suspension support column, and the other end of the suspension support column leads to above the water surface.

[0019] In a third aspect, the present invention further provides a tidal power generation device, comprising at least two fences, which are respectively arranged on the upstream and downstream sides of the horizontal axis hydro-turbine generator, and the width of each fence along the water flow direction is greater than or equal to 8 cm.

[0020] In an embodiment of the third aspect of the present invention, the tidal energy power generation device includes an assembly platform as described in any embodiment of the first aspect of the present invention.

[0021] In an embodiment of the third aspect of the present invention, the tidal current energy power generation device adopts the tidal current energy power generation device as described in any embodiment of the second aspect of the present invention.

[0022] In summary, the present invention connects four fixed piles and brackets together to form an installation space, and then fixes the horizontal axis hydro-turbine generator in the installation space, instead of installing the horizontal axis hydro-turbine generator in a frame as in the prior art, which greatly reduces the use of steel and reduces the manufacturing and installation costs. In addition, the present invention can evenly transfer the thrust of the water flow received by the horizontal axis hydro-turbine generator to both sides by setting the force-bearing support members and nesting members on both sides of the horizontal axis hydro-turbine generator, thereby dispersing it to the entire assembly platform, so that the entire assembly platform can carry a single horizontal axis hydro-turbine generator with a larger power, greatly reducing the power generation cost of the tidal energy power generation device. In particular, the horizontal axis hydro-turbine generator of the present invention has a "fixed point" in the water, thereby avoiding the problem in the prior art that the horizontal axis hydro-turbine generator is easily damaged due to the resonance phenomenon caused by shaking under the huge thrust of the water flow. By adopting the large tidal energy power generation device and its assembly platform provided by this embodiment, the cost of tidal energy power generation can be truly reduced to a level lower than that of thermal power generation, thereby truly realizing the commercial promotion and application of tidal energy power generation.

[0023] In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Shown is a top view of a large-scale tidal current energy power generation device provided according to a first embodiment of the present invention.

[0025] Figure 2 Shown is a side view of a large-scale tidal current energy power generation device provided according to a first embodiment of the present invention.

[0026] Figure 3 Shown is a partial schematic diagram of a large-scale tidal current energy power generation device provided according to a second embodiment of the present invention.

[0027] Figure 4 Shown is a schematic diagram of a fence of a large-scale tidal energy power generation device provided according to a third embodiment of the present invention. DETAILED DESCRIPTION

[0028] Figure 1 Shown is a top view of a large-scale tidal current energy power generation device provided according to a first embodiment of the present invention.

[0029] Figure 2 Shown is a side view of a large-scale tidal current energy power generation device provided according to a first embodiment of the present invention. Figure 1 The dotted circle on the right is an enlarged schematic diagram of the dotted circle on the left. Figure 1 and Figure 2 As shown, in the first embodiment, the large-scale tidal energy power generation device includes an assembly platform 1 and at least one horizontal axis hydro-generator 2 , and the at least one horizontal axis hydro-generator 2 is installed in the assembly platform 1 .

[0030] In this embodiment, the assembly platform 1 includes at least four fixed piles 11, at least two nested members 12, at least two force-bearing support members 13 and a bracket 14. One end of each fixed pile 11 is piled and fixed to the seabed F, and the other end extends above the water surface P. At least four fixed piles 11 are connected as a whole by the bracket 14, and the four fixed piles 11 and the bracket 14 together surround and form an installation space 15. The four fixed piles 11 are arranged in two left and right rows along the water flow direction D, wherein at least two fixed piles 11 in each row are arranged in sequence along the water flow direction D. Specifically, at least four fixed piles 11 are divided into two groups (i.e., two rows), and each group includes at least two fixed piles 11. The cross-sections of at least two fixed piles 11 in each group are connected by a line through the center point that is substantially parallel to the water flow direction D (a slight deviation is allowed). Since each group of fixed piles 11 is arranged in a row parallel to the water flow direction D, the water flow impact force borne by the fixed piles 11 located downstream will be greatly reduced after being blocked by the fixed piles 11 located upstream. Figure 1 As shown in the figure, when the tide is high, the water flow direction is D, and when the tide is low, the water flow direction becomes D'. The "left" and "right" mentioned in this article refer to the left and right sides relative to the direction of the water flow. Specifically, Figure 1 Looking from the direction shown, that is, looking down from above the water surface, the two rows of fixed piles 11 are respectively located on the left and right sides.

[0031] In this embodiment, the bracket 14 includes a plurality of rigid rods, each of which is connected to two fixed piles 11. The force borne by the entire assembly platform 1 is decomposed by transmitting between the fixed piles 11 by the bracket 14. By setting the bracket 14, at least four fixed piles 11 form a whole together, and the force borne by a single fixed pile 11 can be effectively transmitted to other fixed piles 11, so that the force distribution of the entire assembly platform 1 is balanced. In this embodiment, the underwater part and the above-water part of the fixed pile 11 are both provided with a bracket 14 for connection. When the sea area where the tidal energy power generation device is located is relatively deep, the fixed pile 11 will be relatively long, and the bracket 14 can be set at multiple locations underwater, so that the connection between the fixed piles 11 can be more reliable and the force can be dispersed more effectively. However, the present invention does not make any limitation to this, and the connection position and number of connections of the bracket 14 can be set according to specific requirements.

[0032] In practical applications, each fixing pile 11 does not have to be installed completely perpendicular to the seabed F. In this embodiment, the fixing pile 11 is located on the water side or the water side (i.e. Figure 1 The bottom and top fixed piles 11 shown in the figure can be inserted obliquely into the seabed F. The ability of each obliquely inserted fixed pile 11 to resist the impact force of water flow is about 1.5 times that of the vertically arranged fixed piles, that is, the obliquely arranged fixed piles 11 can bear and disperse a greater impact force of water flow.

[0033] In this embodiment, the assembly platform 1 of the tidal current energy power generation device may include a total of six fixed piles 11, three fixed piles 11 are located on the left side of the horizontal axis hydro-turbine generator 2, and three fixed piles 11 are located on the right side of the horizontal axis hydro-turbine generator 2. The three fixed piles 11 located on the left or right side are arranged in sequence along the water flow direction D. The present invention does not impose any restrictions on the specific number of fixed piles 11. In other embodiments, the number of fixed piles may be 4, 8 or 12. By setting more fixed piles 11, the impact force of the water flow on the horizontal axis hydro-turbine generator 2 can be transmitted to more fixed piles 11, so that the water flow impact force can be effectively dispersed, so that the entire tidal current energy power generation device can withstand and resist a larger water flow thrust, thereby also improving the ability of the assembly platform 1 to carry a single larger-scale horizontal axis hydro-turbine generator 2. In other words, the assembly platform 1 provided in the embodiment of the present invention can support a larger-power horizontal axis hydro-turbine generator 2, and improve the upper limit of the power of a single turbine impeller plus a single generator, thereby realizing the commercial promotion and application of tidal current energy power generation devices. In addition, as the number of fixed piles 11 increases, the diameter of each fixed pile 11 can be reduced accordingly, thereby reducing the cross-section of the fixed pile 11 blocking the water flow, improving the utilization rate of the horizontal-axis hydro-turbine generator 2 for the water flow, and improving the power generation efficiency of the horizontal-axis hydro-turbine generator 2.

[0034] Specifically, taking the existing offshore wind power generation device mentioned in the background technology section of this application as an example, the maximum single-unit installed power that the device can carry is 5MW, but a fixed pile with a maximum diameter greater than 6m is required to achieve the load. In this embodiment, at least four fixed piles 11 and a bracket 14 form a whole to disperse the thrust of the water flow received. Each fixed pile only needs to have a diameter of 1.3m to carry a horizontal axis hydro-turbine generator with a single installed power of 5MW, so the diameter of the fixed pile can be greatly reduced. The difficulty and cost of making each fixed pile are also reduced accordingly. In addition, the installation process of a single fixed pile that needs to be fixed on the seabed will be very cumbersome. During the installation, a pile driving platform formed by multiple auxiliary piles needs to be set around the single fixed pile, and then after the single fixed pile is installed and fixed, people and ships are sent to remove the auxiliary pile driving platform, and even underwater operations are involved, which results in a very high installation cost of the fixed pile. However, this embodiment uses at least four fixed piles connected to each other to form a natural pile driving platform. No additional auxiliary piling platform is required, which greatly reduces the installation cost of fixed piles. Therefore, the sum of the manufacturing cost and installation cost of four fixed piles with a diameter of 1.3m is much less than the manufacturing cost and installation cost of one fixed pile with a diameter of 6m.

[0035] If each fixed pile of this embodiment has a diameter of 3m, it can carry a horizontal axis hydro-turbine generator with an installed power of up to 20MW, breaking the upper limit of the existing single-unit installed power and truly increasing the single-unit installed power. The maximum single-unit installed power of the existing tidal energy power generation device is only 2MW. To achieve a power generation of 20MW, it is necessary to operate up to ten horizontal axis hydro-turbine generators, and at least ten assembly platforms need to be set up for installation. However, the tidal energy power generation device of the first embodiment of the present invention only needs to set up one horizontal axis hydro-turbine generator and one assembly platform to achieve a power generation of 20MW, which greatly reduces the cost and makes the commercial use of tidal energy power generation devices truly possible.

[0036] The cost of tidal power generation equipment is basically composed of two parts, one is the manufacturing cost and installation cost of the generator, and the other is the manufacturing cost and installation cost of the assembly platform. For example, the manufacturing cost and installation cost of a 2.5MW horizontal axis hydro-turbine generator is 20 million, the manufacturing cost and installation cost of two 2.5MW horizontal axis hydro-turbine generators is 40 million, and the manufacturing cost and installation cost of a 5MW horizontal axis hydro-turbine generator is only 26 million. In other words, without considering the difference in the manufacturing cost and installation cost of the assembly platform, in terms of the cost of the horizontal axis hydro-turbine generator alone, running a higher power horizontal axis hydro-turbine generator will greatly reduce the cost per kilowatt-hour, not to mention that the manufacturing cost and installation cost of the assembly platform of this embodiment are also much lower than the manufacturing cost and installation cost of the assembly platform of the prior art.

[0037] In this embodiment, at least two nesting members 12 are detachably mounted on the main piles on the left and right sides of the horizontal axis hydro-turbine generator 2 and are located below the water surface P. In this embodiment, the assembly platform of the tidal energy power generation device has 6 fixed piles, the fixed pile 11 in the middle of the left column and the fixed pile 11 in the middle of the right column are the main piles, and the two nesting members 12 are respectively mounted on the main piles on the left and right sides along the water flow direction. In this embodiment, the nesting member 12 is circular, but the present invention does not impose any restrictions on the specific structure of the nesting member. In other embodiments, when the tidal energy power generation device has 8 fixed piles, the two fixed piles in the middle of the left column and the two fixed piles in the middle of the right column can be the main piles, and each nesting member 12 can be a double-ring structure and can be mounted on two main piles at the same time.

[0038] In this embodiment, one end of at least two force-bearing support members 13 is respectively installed on the left and right sides of the horizontal axis hydro-generator 2 along the water flow direction D, and the other end is respectively installed with a nesting member 12. Figure 1 Taking the load-bearing support member 13 on the left side as an example, one end of the load-bearing support member 13 refers to the right end, and the other end of the load-bearing support member 13 refers to the left end. Figure 1 Taking the load-bearing support member 13 on the right side as an example, one end of the load-bearing support member 13 refers to the left end, and the other end of the load-bearing support member 13 refers to the right end.

[0039] The force-bearing support member 13 and the nesting member 12 of this embodiment are combined to resist the impact force of the water flow on the horizontal axis hydro-generator 2. Specifically, Figure 1 As shown, the water flows from bottom to top along the water flow direction D toward the horizontal axis hydro-turbine generator 2. Since one end of the two force-bearing supports 13 is respectively fixed on both sides of the horizontal axis hydro-turbine generator 2, the thrust of the water flow on the horizontal axis hydro-turbine generator 2 can be directly transmitted and decomposed on both sides. The thrust is evenly distributed to each fixed pile 11 through the force-bearing support 13, the nesting member 12, the main pile and the bracket 14, and all the fixed piles 11 are stressed together. At the same time, since the nesting member 12 is fixed on the main pile, the nesting member 12 will produce a force on the force-bearing support 13 as shown in FIG. Figure 1 When viewed from the direction of "blocking force" from top to bottom, the effects of different forces are offset to achieve a balance, thereby ensuring the stability of the horizontal-axis hydraulic turbine generator 2 in the water, thereby increasing the upper limit of the water flow thrust that the horizontal-axis hydraulic turbine generator 2 can withstand.

[0040] In the prior art, the horizontal axis hydro-turbine generator is fixed to the seabed by a single bearing pile, and the single bearing pile will bear the entire impact force of the water flow on the horizontal axis hydro-turbine generator. The bending moment and shear force generated in this process will be very large. In order to ensure that the bearing pile is not overloaded, an upper limit is set for the single-unit installed capacity of the horizontal axis hydro-turbine generator. However, the assembly platform of this embodiment is provided with at least two force points at the "waist" of the entire power generation device, which effectively disperses the impact force of the water flow on the horizontal axis hydro-turbine generator laterally. Since the tidal energy generating device uses the kinetic energy of the water flow to generate electricity, the greater the thrust of the water flow, the greater the power generation. Therefore, the tidal energy generating device of this embodiment can carry a horizontal axis hydro-turbine generator with a larger power.

[0041] The nested piece 12 and the main pile of this embodiment can be fixed by a jack or fixing bolts. However, the present invention does not impose any limitation on this. In another embodiment, the nested piece 12 and the main pile can achieve an interference fit. Specifically, when the force-bearing support member 13 is sleeved on the main pile, the nested piece 12 and the main pile can be completely clamped without the need for additional jacks or fixing bolts, and the fixation of the two will not become loose. During installation, there is no need for the installer to enter the water for installation operations, and therefore there is no need to set up an additional manhole.

[0042] In this embodiment, the number of the nesting members 12 and the force-bearing support members 13 are both two. However, the present invention does not impose any limitation on this. In other embodiments, the number of the nesting members and the force-bearing support members may be both four, and there may be two nesting members and force-bearing support members on the left and right sides of the horizontal axis hydro-turbine generator along the water flow direction. In this embodiment, the length direction of the force-bearing support member 13 is perpendicular to the water flow direction D and parallel to the horizontal plane P. Such a setting not only reduces the amount of steel used in the force-bearing support member 1 but also reduces the bending moment generated by the force-bearing support member 1. The present invention does not impose any limitation on this either. In other embodiments, the length direction of the force-bearing support member may be perpendicular to the water flow direction, but may not be parallel to the horizontal plane, that is, the force-bearing support member may be inclined. The more inclined the force-bearing support member 13 is, the longer the length of the force-bearing support member 13 will be, the greater the amount of steel used will be, and the greater the bending moment generated will be. Therefore, the joint end of the force-bearing support member 13 and the nesting member 12 needs to be set below the water surface.

[0043] In this embodiment, one end of the two force-bearing supports 13 is directly mounted on the generator part of the horizontal-axis hydro-turbine generator 2 and is located on the left and right sides. However, the present invention does not impose any limitation on this. In other embodiments, the horizontal-axis hydro-turbine generator may have a suspension support column, then one end of the two force-bearing supports 13 may be mounted on the suspension support column and still be located on both sides of the horizontal-axis hydro-turbine generator 2. In other words, one end of the force-bearing support is directly or indirectly mounted on the horizontal-axis hydro-turbine generator 2, thereby decomposing the force exerted on the horizontal-axis hydro-turbine generator 2 toward both sides. Preferably, the positions where the two force-bearing supports 13 are fixed on both sides of the horizontal-axis hydro-turbine generator 2 are as close to the horizontal-axis hydro-turbine generator as possible, and the farther away, the weaker the effect of decomposing and transmitting the force, while increasing the bending moment generated by the suspension support column.

[0044] During the actual installation process, the horizontal axis turbine generator 2, the load-bearing support 13 and the nesting member 12 are welded and fixed on the shore to form an inner module. The prototype of the fixed pile 11 and the bracket 14 are also welded and fixed to each other on the shore, and then they are transported to the installation waters, and at least four fixed piles 11 are piled respectively, thereby completing the installation of the assembly platform 1. After that, the inner module is hoisted from the water surface from top to bottom into the installation space 15 of the assembly platform 1, and then the nesting member 12 and the main pile are fixed, that is, the installation of the entire tidal energy power generation device is completed. In this embodiment, all manufacturing and installation actions of the tidal energy power generation device and its assembly platform can be completed above the water surface, eliminating underwater operations, reducing the difficulty of construction, improving the safety of construction personnel, and greatly reducing the construction and installation costs.

[0045] Regarding how each fixed pile 11 in this embodiment is fixed on the seabed F, the piling method disclosed in another Chinese patent (Announcement No. CN105401564) invented by the inventor can be used for piling, or other existing piling methods can be used, which will not be described in detail here. The present invention does not make any limitation to this. It should be noted that, in this embodiment, only the piling method of the fixed piles can be consistent with the piling method disclosed in CN10540156, but the structure and installation method of the entire tidal energy power generation device are essentially different from the structure and installation method disclosed in CN10540156.

[0046] First, the horizontal axis hydro-turbine generator in CN10540156 invented by the inventor is first installed in the inner frame, and then the inner frame is inserted into the outer frame. The setting of the inner frame and the outer frame will lead to a significant increase in the amount of steel used and a substantial increase in the cost. After the tidal energy power generation device previously invented by the inventor was put into practical use, the inventor found that the thrust generated by the water flow was huge and unimaginable, and the maximum thrust could be as high as 2000-3000 tons. Therefore, the thrust of the water flow on the hydro-turbine generator can only be offset by increasing the weight of the inner frame and relying on the friction caused by its own gravity, which leads to a sharp increase in the amount of steel used and the cost. This embodiment completely abandons the use of the frame. The entire assembly platform, except for a small amount of steel cages that are needed in the process of pouring concrete to form fixed piles, and steel is used for the load-bearing support parts, nested parts and brackets, no other parts require steel at all. The steel consumption of the entire assembly platform is reduced geometrically, which greatly reduces the manufacturing cost.

[0047] The inventor has found through actual application comparison that the installation method and structure previously invented by the inventor are implemented. A horizontal axis water flow generator with a single unit installed capacity of 200KW has an impeller diameter of 5.4m and an impeller cross-section of 22.9m 2 , the turbine generator will bear the thrust of 23 tons of water flow. At this time, the inner frame needs to be as high as more than 230 tons to ensure the safe operation of the turbine generator. However, the weight of the entire assembly platform of the tidal power generation device of this embodiment only needs to be 125 tons (if the buoyancy generated by the hollow load-bearing support and the hollow generator cabin is removed, there is actually only 25 tons of gravity in the water), and the horizontal axis turbine generator with a single installed capacity of 1.5MW can be operated stably. The impeller diameter is 15m and the impeller cross-section is 177m 2 , the turbine generator will bear the thrust of 177 tons of water flow. If the installation method and structure previously invented by the inventor are adopted, a frame of up to 1,800 tons is required to carry a 1.5MW horizontal axis turbine, and a frame of this weight is simply impossible to achieve from both a technical and cost perspective. Therefore, the frame problem alone limits the expansion of the existing horizontal axis turbine generator.

[0048] Secondly, the horizontal axis hydro-turbine generator in CN10540156 is rotatably fixed at the top and bottom of the inner frame through the central rotating shaft. Under the huge thrust of the water flow, the horizontal axis hydro-turbine generator is easy to vibrate during operation. The larger the generator scale, the more severe the vibration. Severe vibration will cause the components inside the horizontal axis hydro-turbine generator to resonate and thus be damaged. Therefore, after the tidal current energy power generation device previously invented by the inventor was put into practical application, it was found that the installation method in CN10540156 can only safely operate a 200KW or 300KW horizontal axis hydro-turbine generator. If the single unit scale reaches more than 1MW, the horizontal axis hydro-turbine generator will be very easy to be damaged, which makes it impossible to break through the single unit scale of the horizontal axis hydro-turbine generator. However, the tidal current energy power generation device provided in this embodiment is provided with at least two "binding points" at or near the waist of the horizontal axis hydro-turbine generator. The horizontal axis hydro-turbine generator is directly and firmly fixed to the force-bearing support member, and then the force-bearing support member is also firmly fixed to the nesting member, and the nesting member and the bracket and the fixing pile are also firmly fixed. In other words, the horizontal axis hydro-turbine generator and the assembly platform are firmly fixed, and no components will vibrate beyond the safe range in the water, thus avoiding the problem of resonance. Therefore, the tidal current energy power generation device provided in this embodiment can stably operate a horizontal axis hydro-turbine generator with a larger installed capacity.

[0049] In this embodiment, in order to effectively reduce the damage of marine foreign matter (such as marine garbage or floating ice) to the horizontal-axis hydro-turbine generator 2, it is necessary to set fences both upstream and downstream of the horizontal-axis hydro-turbine generator 2. Due to the large amount of marine garbage, the surface garbage needs to be cleaned regularly after the fence has been used for a period of time to ensure that the water flows smoothly into the horizontal-axis hydro-turbine generator 2 without being blocked by the garbage, thereby ensuring the power generation efficiency. In addition, due to the rapid flow of water, some garbage is sharp, and even if the fence is made of steel wire, there will still be damage problems, so the fence needs to be repaired and replaced frequently. The existing fence cleaning, installation and maintenance personnel must dive into the water to perform operations, which is difficult to operate and inefficient. In addition, due to the collision of water flow around the tidal energy generator, whirlpools are easily formed, and maintenance and cleaning are also dangerous.

[0050] In this embodiment, the assembly platform 1 further includes at least two groups of fence guide grooves 16 for installing or fixing fences, and the two groups of fence guide grooves 16 are respectively arranged on the upstream and downstream sides of the horizontal axis hydro-generator 2 (if the water flow direction is as follows Figure 1 As shown in D, Figure 1 The lower part is the upstream, Figure 1 The upper side of the fence guide groove 16 is the downstream side), and each group of fence guide grooves 16 is connected from above the water surface to below the water surface. In this embodiment, each group of fence guide grooves 16 includes two fence guide grooves, one group of fence guide grooves 16 is located at Figure 1 Two fixed piles 11( Figure 1 On the upstream side of the two lowest fixed piles), another set of fence guide grooves 16 are located Figure 1 The downstream side of the two fixing piles 11 (the two fixing piles at the top) in the middle and downstream. In actual application, the left and right sides of the fence can be inserted into the fence guide groove 16 from top to bottom along a group of fence guide grooves 16, and then slide to the bottom by their own gravity, thereby completing the installation and fixation of the fence. By setting the fence guide grooves 16, the installation of the fence is easier, and there is no need to perform installation operations in the sea, and the installation of the fence can be completed directly by operating on the sea surface. In particular, when the fence needs to be cleaned or replaced, the fence can be pulled out from bottom to top along the fence guide grooves 16, and the personnel only need to operate on the water surface. Therefore, the setting of the fence guide grooves 16 also facilitates the cleaning and replacement of the fence. By setting the fence guide grooves 16, the cost of installing the fence and repairing and replacing is reduced. This embodiment does not impose any restrictions on the specific type of the fence.

[0051] In this embodiment, the assembly platform 1 includes at least one man-through pipe 17, and at least one man-through pipe 17 is connected from above the water surface to below the water surface, so that people can reach below the water surface through the man-through pipe 17 for maintenance or fixing operations. In this embodiment, the number of man-through pipes 17 is two, and the two man-through pipes 17 are respectively located in the main piles on both sides of the horizontal axis hydro-turbine generator 2. People can reach below the water surface through the man-through pipes 17 to install and fix the nesting member 12 and the main pile. In this embodiment, the lower part of the main pile is poured with concrete, and the upper part is hollow, so that people can reach below the water surface through the main pile to install and fix the main pile and the nesting member. In other words, the main pile with a hollow upper part plays the role of the man-through pipe 17, so there is no need to set up a special pipe as the man-through pipe 17. It is only necessary to set up a ladder in the main pile, and people can enter the water through the internal ladder to reach the fixing place of the main pile and the nesting member 12, so as to perform fixing operations (such as adjusting the fixing bolts, etc.). The present invention does not impose any limitation on this. In other embodiments, the through pipe 17 may be arranged along the outside of the main pile.

[0052] In this embodiment, the assembly platform 1 also includes at least one blower 181 and a ventilation pipe 182. The ventilation pipe 182 can be fixedly or detachably arranged along the inside or outside of the man-in-pipe 17. The ventilation pipe 182 passes from above the water surface P to below the water surface P so that the working area under the water surface can be ventilated. The existing tidal power generation device has not considered the situation of underwater installation or maintenance. The inventor has considered underwater maintenance before, but ignored the problem that due to the long-term operation of the internal machine, the high temperature generated by the machine heating will also be accompanied by the generation of toxic and harmful gases and excessive carbon dioxide concentration. If underwater operations are required, personnel need to stay underwater for a long time, and it is easy to suffer from hypoxia or carbon dioxide poisoning. The blower 181 and ventilation pipe 182 of this embodiment constitute a fresh air system, which greatly guarantees the life safety of maintenance personnel or installers entering underwater. When personnel need to enter the working area below the water surface to work, the blower can be started to change the air in the working area below the water surface. In specific applications, the fresh air system may have a more complex structure, such as an independent air supply system and exhaust system, etc., which will not be elaborated here.

[0053] In this embodiment, the assembly platform 1 also includes at least one pump 183 and at least one drain pipe 184. The drain pipe 184 can be fixedly or detachably arranged along the inside or outside of the man-through pipe 17. The drain pipe 184 passes from above the water surface P to below the water surface P. The pump 183 extracts the accumulated water in the working area below the water surface and discharges it to above the water surface through the drain pipe 184. Since most of the entire tidal energy power generation device is located in the water, after a long period of operation, the sealing ring is prone to loosening, and it is difficult to ensure that there will be no leakage at the sealing ring. If there are no protective measures, maintenance personnel or installers may face life-threatening situations if they enter the underwater working area from the man-through pipe 17. By setting the pump 183 and the drain pipe 184, the life safety of personnel is greatly guaranteed. In this embodiment, before personnel need to work underwater, the pump 183 is started and operated for a period of time to observe whether there is accumulated water discharged from the drain pipe 184. Personnel can enter the man-through pipe 17 until there is no obvious accumulated water discharged from the drain pipe 184. When the personnel are working underwater, the water pump 183 keeps working until the personnel finish the work and return to the surface. However, the present invention does not impose any limitation on the working mode of the water pump. In other embodiments, the water pump 183 can be operated regularly to extract the accumulated water inside and discharge it to the surface above the water through the drain pipe 184, so as to avoid the accumulated water damaging the components and ensure the life safety of the personnel. In this embodiment, the ventilation pipe 182, the drain pipe 184, and the man-access pipe 17 can all be located in the fixed pile 11. However, the present invention does not impose any limitation on this. In other embodiments, a special ventilation pipe 182, a drain pipe 184, and a man-access pipe 17 can be set outside the fixed pile 11 to pass from the water to the underwater.

[0054] In this embodiment, each row of fixed piles 11 is provided with a side plate 19 on one side facing the horizontal-axis hydro-turbine generator 2. The side plate 19 can form a waterway to play a rectifying role, that is, it can gather the water flow and better guide it to the horizontal-axis hydro-turbine generator 2, thereby improving the power generation efficiency. In another embodiment, the horizontal-axis hydro-turbine generator 2 can be provided with side plates on the upper, lower, left, and right sides, so as to form a waterway to guide the water to rush to the horizontal-axis hydro-turbine generator 2.

[0055] like Figure 2 As shown, in this embodiment, each fixed pile 11 of the assembly platform 1 is provided with a concrete protection device 111 in the area above the lowest tide line L, which protects each fixed pile 11 from strong corrosion in the intertidal zone, thereby greatly extending the service life of the fixed pile 11, and thus extending the service life of the assembly platform 1, reducing the maintenance frequency and cost. Since water plays a role in isolating oxygen in the air, the part of the fixed pile 11 under water is not easy to corrode, and the part of the fixed pile 11 above the water surface is the most susceptible to corrosion. If the concrete protection device is not provided, once the part of the fixed pile 11 above the water surface is corroded, the force transmission between the fixed piles 11 will no longer be balanced, which may cause the entire assembly platform 1 to be unbalanced or even collapse. By providing the concrete protection device 111, the service life of the entire assembly platform 1 can be as long as 50 years. With the rise and fall of the tide, the height of the water surface P will change, so the lowermost end of the concrete protection device 111 is preferably set at the lowest tide line L. In actual application, the lowermost end of the concrete protection device 111 can be lower than the lowest tide line L. In a specific application, a protective cover is provided in the area of ​​the fixed pile 11 located above the lowest tide line L, and then concrete is poured into the protective cover to form a concrete protection device 111 .

[0056] In this embodiment, the assembly platform also includes a sealing device 185 and a fixing assembly 186, the fixing assembly 186 includes at least one fixing bolt, and the sealing device 185 is correspondingly arranged at the fixing assembly 186. During the installation process of the tidal energy power generation device of this embodiment, the horizontal axis turbine generator 2, at least two force-bearing support members 13 and at least two nesting members 12 are welded and connected on the shore to form an inner module. After the fixed pile 11 completes the pile driving and fixing on the seabed F (including but not limited to drilling holes on the seabed, embedding piles into the bedrock layer, and pouring concrete in the pile to form a reinforced concrete cast-in-place pile), the inner module is hoisted from top to bottom into the installation space 15 located in the water. Then the personnel enter from the access pipe 17 (in this embodiment, they enter along the internal ladder of the main pile), and by adjusting the fixing assembly 186 (such as tightening the fixing bolts), the nesting member 12 and the main pile are clamped, thereby achieving the fixation of the nesting member 12 and the main pile. At this point, the entire inner module and the assembly platform 1 are fixed, and the entire tidal energy power generation device is installed. However, the present invention does not limit this. In another embodiment, the man-through pipe 17 can be passed into the force-bearing support member 13, and then a person enters the force-bearing support member 13 to fix the nesting member 12 and the main pile together through the sealing device 185 and the fixing assembly 186. In another embodiment, the nesting member 12 and the main pile are fixed by snapping, so there is no need to provide the sealing device 185 and the fixing assembly 186.

[0057] In the actual manufacturing process, it is difficult to ensure that the inner diameter of the nested piece can completely match the outer diameter of the main pile. Because of the tolerance, there will be a gap between the main pile and the nested piece 12. In order to prevent the horizontal-axis hydro-turbine generator 2 from shaking, the installer can enter the water through the manhole 17 to adjust the fixing assembly 186 (such as tightening the fixing bolts), so that the nested piece 12 is firmly stuck on the outer wall of the fixing pile 11, avoiding the shaking of the horizontal-axis hydro-turbine generator 2. Regardless of whether it is high tide or low tide, the horizontal-axis hydro-turbine generator 2 is firmly positioned and will not produce vibrations beyond the acceptable range. In this process, the blower 181 is always working, and fresh air is sent in from the ventilation pipe 182. And the water pump 183 can also be always working to discharge possible accumulated water from the drain pipe 184, thereby ensuring the life safety of personnel. When the horizontal-axis hydro-turbine generator 2 needs to be lifted out of the water, the fixing assembly 186 can be loosened to release the fixed relationship between the horizontal-axis hydro-turbine generator 2 and the main pile, so as to realize the detachable installation and fixation of the horizontal-axis hydro-turbine generator 2.

[0058] In this embodiment, the tidal current energy power generation device further includes at least one suspension support column 31, which is a closed hollow structure. One end of the suspension support column 31 is connected to the horizontal axis hydro-turbine generator 2, so that personnel can enter the interior of the horizontal axis hydro-turbine generator 2 through the suspension support column 31, and the other end of the suspension support column 31 leads to above the water surface P. Since the suspension support column 31 is a closed hollow structure, a ladder can be set inside the suspension support column 31. Personnel can enter the interior of the horizontal axis hydro-turbine generator 2 through the ladder inside the middle suspension support column 31 to work (such as replacing the sealing ring, replacing the oil and other maintenance work or arranging the pipeline line). When the horizontal axis hydro-turbine generator 2 fails, it is not necessary to lift the horizontal axis hydro-turbine generator 2 out of the water, and personnel can directly enter the interior of the horizontal axis hydro-turbine generator 2 for maintenance. The suspension support column 31 in the tidal current energy power generation device of this embodiment is correspondingly provided with a blower 181, a ventilation pipe 182, a water pump 183 and a drain pipe 184 to ensure the life safety of underwater workers.

[0059] Most of the existing tidal power generation devices are equipped with a single bearing pile under the horizontal axis hydro-turbine generator. This installation method has two obvious disadvantages. The first is that the single bearing pile support mentioned above will bear the entire thrust of the water flow on the horizontal axis hydro-turbine generator, resulting in excessive bending moment and shear force, so it is impossible to carry a larger single-unit horizontal axis hydro-turbine generator, making the power generation cost high. The second is that if the horizontal axis hydro-turbine generator needs to be repaired, it is necessary to remove the connection between the horizontal axis hydro-turbine generator and the bearing pile underwater, and then lift the horizontal axis hydro-turbine generator off the sea surface, which poses a great safety hazard for maintenance. In addition, in order to ensure the normal operation of the horizontal axis hydro-turbine generator, the fixation between the bearing pile and the horizontal axis hydro-turbine generator must be very reliable, which also means that it is very difficult to remove the connection between the two, not to mention the operation underwater, which makes maintenance very difficult. Therefore, many existing tidal power generation devices are not maintained at all. Once the horizontal axis hydro turbine generator is damaged (for example, the sealing ring becomes loose due to long-term use, causing water to enter the horizontal axis hydro turbine generator or the oil of the horizontal axis hydro turbine generator needs to be replaced, etc.), the entire power generation device is directly scrapped. This is also one of the important reasons for the short service life and high cost of existing tidal power generation devices, making it impossible for tidal power generation devices to be commercialized.

[0060] However, when the horizontal-axis hydro-turbine generator 2 in this embodiment needs to be repaired, the maintenance personnel can directly enter the interior of the horizontal-axis hydro-turbine generator 2 through the suspension support column 31 to directly perform underwater maintenance. In actual applications, the service life of the assembly platform of this embodiment can be as long as 50 years, but the upper limit of the use of the horizontal-axis hydro-turbine generator is 20 years. When the horizontal-axis hydro-turbine generator 2 reaches the end of its service life, it is only necessary to release the fixed connection between the horizontal-axis hydro-turbine generator 2 and the assembly platform 1, and then the horizontal-axis hydro-turbine generator 2 can be lifted out of the water from bottom to top, and a new horizontal-axis hydro-turbine generator 2 can be replaced for installation. The horizontal-axis hydro-turbine generator 2 in this embodiment is installed in an inverted and detachable manner, and the maintenance and replacement cost and difficulty of the horizontal-axis hydro-turbine generator 2 are much lower than the maintenance cost and difficulty of the horizontal-axis hydro-turbine generator directly fixed on the seabed.

[0061] The horizontal axis hydro-turbine generator 2 of this embodiment is fixed underwater by the suspension support column 31 and the force-bearing supports 13 on both sides, ensuring that the horizontal axis hydro-turbine generator 2 will not shake under the huge thrust of the water flow, and the vibration generated is also within a safe range. Therefore, the tidal energy power generation device provided in this embodiment can operate a larger-scale horizontal axis hydro-turbine generator, which also means that the single-unit installed power of the horizontal axis hydro-turbine generator will be larger. The maximum single-unit installed power that the existing tidal energy power generation device can withstand is 2MW. The tidal energy power generation device of this embodiment can directly carry and operate a horizontal axis hydro-turbine generator with a single-unit installed power of 5MW or even 10MW or 20MW. This has greatly promoted the development of the ocean energy power generation industry and promoted technological progress, bringing fundamental changes to the industry.

[0062] At the same time, even if the existing tidal power generation device adopts a single-unit installed power of 2MW, it cannot generate electricity continuously because it has not solved the maintenance and other problems. Even if some tidal power generation devices consider the maintenance problem, the high maintenance cost leads to the cost of tidal power generation being much higher than the cost of other energy sources. Therefore, the commercial value of the existing tidal power generation devices has always been very small. The suspension support column of this embodiment not only plays a supporting role, but also allows people to enter the interior of the horizontal axis hydro-turbine generator for maintenance, which greatly reduces the maintenance cost.

[0063] In this embodiment, the large tidal current power generation device further includes at least one connecting member 4, which connects one end of the suspension support column 31 above the water surface and the assembly platform 1 horizontally or longitudinally. When it is necessary to separate the horizontal-axis hydro-generator 2 from the assembly platform 1, the connection between the connecting member 4 and the assembly platform 1 is released, and the fixing assembly 186 is loosened to lift the horizontal-axis hydro-generator 2 out of the water.

[0064] In another embodiment, the tidal energy power generation device may not have a suspension support column, and the two man-through pipes 17 may be connected to the load-bearing support member 13 respectively, and the two load-bearing support members 13 may be hollow structures, and personnel may reach the interior of the horizontal-axis hydro-turbine generator 2 through the man-through pipes 17 and the load-bearing support member 13 to perform maintenance operations on the interior of the horizontal-axis hydro-turbine generator 2 (such as oil renewal, gear replacement, seal replacement, etc.). The ventilation pipe 182 and the drainage pipe 184 may also be connected to the interior of the load-bearing support member 13, and the ventilation pipe 182 and the drainage pipe 184 may be arranged along the hollow load-bearing support member 13, all the way to the interior of the horizontal-axis hydro-turbine generator 2. However, the present invention does not make any limitation to this. In other embodiments, the assembly platform may have only one access pipe, through which personnel can reach the force-bearing support on one side to fix and install the nesting member 12 and the main pile on one side, or reach the interior of the horizontal-axis hydro-turbine generator through the force-bearing support to perform maintenance operations on the horizontal-axis hydro-turbine generator, or fix and install the nesting member 12 and the main pile on the other side through the force-bearing support on one side, the horizontal-axis hydro-turbine generator, and the force-bearing support on the other side. In yet another embodiment, the assembly platform may be provided with a special access pipe to directly connect to the interior of the horizontal-axis hydro-turbine generator from above the water surface.

[0065] Figure 3 The figure shows a partial schematic diagram of a large tidal current power generation device provided according to the second embodiment of the present invention. The assembly platform, horizontal axis turbine generator, fixed pile 11, concrete protection device, nesting member 12, force support member, bracket, installation space, fence guide groove, manhole, blower, ventilation pipe, water pump, drainage pipe, side plate, etc. of the second embodiment can be basically the same as the corresponding components in the first embodiment in structure and function. Only the differences are described below.

[0066] In the second embodiment, the assembly platform further includes two shock-absorbing devices 21, each of which is disposed between the nesting member 12 and the fixing pile 11. The shock-absorbing device 21 can be made of special polyethylene polymer material, rubber material or spring, etc. By providing the shock-absorbing device 21, the resonance that may be generated by the horizontal axis hydro-turbine generator can be effectively reduced.

[0067] Figure 4 FIG. 1 is a schematic diagram of a fence provided according to a third embodiment of the present invention. Figure 4 The dotted circle on the right is a top view of the dotted circle on the left. The assembly platform, horizontal axis turbine generator, fixed pile, concrete protection device, nesting member, force support member, bracket, installation space, fence guide, manhole, blower, ventilation pipe, water pump, drainage pipe, side plate, etc. of the third embodiment can be basically the same as the corresponding components in the first embodiment in structure and function. Only the differences are described below.

[0068] In this embodiment, the assembly platform includes at least two fences 3, which are respectively arranged on the upstream and downstream sides of the horizontal axis hydro-turbine generator 2, and the width W of each fence 3 along the water flow direction is greater than or equal to 8 cm. Existing tidal power generation devices often ignore the damage to the impeller of the hydro-turbine generator caused by foreign objects in the ocean (such as marine garbage, floating ice in the sea, etc.). The inventor noticed this point, so he adopted the method of setting fences to reduce the probability of marine foreign objects being involved in the impeller. However, after more than a year of practice, it was found that if the fence is formed by woven steel wire, the steel wire junction will rub against each other after continuous impact by the water flow, and the thickness of the steel wire at the junction will continue to become thinner, and eventually the steel wire will break, thereby losing the function of the fence to intercept marine foreign objects. More importantly, the broken steel wire will be twisted into the impeller of the hydro-turbine generator, damaging the blades and causing damage to the entire horizontal axis hydro-turbine generator. This not only fails to protect the impeller, but also unexpectedly causes the maintenance cost to rise. Therefore, by setting the width of the fence 3 along the water flow direction to be greater than or equal to 8 cm, the fence will not be damaged again no matter how the water flow impacts. Due to the particularity of this field, every maintenance or replacement of components of the tidal energy horizontal axis hydro-turbine generator will cause a huge increase in costs, hindering the commercial application of tidal energy power generation devices. Those skilled in the art often fell into misunderstandings and have always considered the problem from a theoretical perspective, while ignoring the economic applicability of the power generation device after it is actually put into use. The parameter of 8 cm is the parameter that the inventor has determined after continuous practice accumulation, summarizing experience and lessons, and finally determined to ensure that the fence has a sufficiently long service life.

[0069] In this embodiment, the height of each fence grid along the water depth direction is still the diameter of the steel wire, that is, about 8mm. In practical applications, the width W of the fence 3 along the water flow direction can be 30 cm, which effectively prevents the impact of ice in the waters near northern Canada, and also ensures that the steel wire will not be cut. In this embodiment, the length of the fence perpendicular to the water flow direction and parallel to the horizontal plane is determined according to the size of the corresponding installed assembly platform, which is not limited by this patent. For example, it can be 15m*20m. The height of the fence along the water depth direction is determined according to the stress conditions of the water flow environment of the implementation site, which is not specifically limited by this patent. The mesh of the fence can be a square or diamond structure. This patent does not limit the size of the mesh distance, and the mesh can be 30cm*30cm. In addition, this patent does not limit the specific materials of the fence bracket and the block net.

[0070] All features in all embodiments mentioned in this application can be freely combined and used according to actual conditions. For example, the fence in the third embodiment can be applied to the tidal energy power generation device of any of the first or second embodiments, and the fence in the third embodiment can also be used in any existing tidal energy power generation device. The tidal energy power generation device of any of the first or second embodiments can also adopt fences of other structures. The tidal energy power generation devices of the first to third embodiments can all be equipped with one or more horizontal axis hydro turbine generators in the water depth direction.

[0071] In summary, the present invention connects four fixed piles and brackets together to form an installation space, and then fixes the horizontal axis hydro-turbine generator in the installation space, instead of installing the horizontal axis hydro-turbine generator in a frame as in the prior art, which greatly reduces the use of steel and reduces the manufacturing and installation costs. In addition, the present invention can evenly transfer the thrust of the water flow received by the horizontal axis hydro-turbine generator to both sides by setting the force-bearing support members and nesting members located on both sides of the horizontal axis hydro-turbine generator, thereby dispersing it to the entire assembly platform, so that the entire assembly platform can carry a single horizontal axis hydro-turbine generator with a larger power, greatly reducing the power generation cost of the tidal energy power generation device. In particular, the horizontal axis hydro-turbine generator of the present invention has a "fixed point" in the water, thereby avoiding the problem in the prior art that the horizontal axis hydro-turbine generator is easily damaged due to the resonance phenomenon caused by shaking under the huge thrust of the water flow. By adopting the large tidal energy power generation device and its assembly platform provided by the present application, the cost of tidal energy power generation can be truly reduced to a level lower than that of thermal power generation, thereby truly realizing the commercial promotion and application of tidal energy power generation.

[0072] Although the present invention has been disclosed as above by the preferred embodiment, it is not intended to limit the present invention. Anyone familiar with this technology can make slight changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope of protection required by the claims.

Claims

1. An assembly platform of a large tidal current power generation device, in which at least one horizontal axis hydro-turbine generator is installed, characterized in that: The assembly platform of the large tidal energy power generation device comprises: Bracket; At least four fixed piles, the at least four fixed piles are connected into one body by a bracket and surround to form an installation space, the at least one horizontal-axis hydro-generator is installed in the installation space, one end of each fixed pile is piled and fixed to the seabed, and the other end extends above the water surface, the at least four fixed piles are arranged in two left and right rows along the water flow direction, wherein at least two fixed piles in each row are arranged in sequence along the water flow direction, and at least one fixed pile of the at least two fixed piles in each row is used as a main load-bearing pile; At least two nesting members are detachably mounted on the main piles on the left and right sides of the horizontal axis hydro-generator and are located below the water surface; At least two load-bearing supports, one end of which is respectively installed on the left and right sides of the horizontal-axis hydraulic generator along the water flow direction, and the other end is correspondingly installed with nesting members to resist the impact force of the water flow on the horizontal-axis hydraulic generator.

2. The assembly platform of the large-scale tidal energy power generation device according to claim 1 is characterized in that: The assembly platform also includes at least two groups of fence guide grooves for installing or fixing fences, which are respectively arranged on the upstream and downstream sides of the horizontal axis hydro-generator, and each group of fence guide grooves extends from above the water surface to below the water surface.

3. The assembly platform of the large-scale tidal energy power generation device according to claim 1 is characterized in that: The assembly platform also includes at least one man-accessible pipe, one end of which leads to above the water surface and the other end leads to below the water surface, so that people can reach below the water surface to install and fix the main piles and nesting parts.

4. The assembly platform of the large-scale tidal energy power generation device according to claim 3 is characterized in that: The assembly platform also includes at least one blower and a ventilation pipe, which can be fixedly or detachably arranged along the inside or outside of the passage, and the ventilation pipe extends from above the water surface to below the water surface to enable air exchange in the working area under the water surface.

5. The assembly platform of the large-scale tidal energy power generation device according to claim 3 is characterized in that: The assembly platform also includes at least one water pump and at least one drainage pipe. The drainage pipe can be fixedly or detachably arranged along the inside or outside of the through pipe. The drainage pipe extends from above the water surface to below the water surface. The water pump draws the accumulated water in the working area below the water surface and discharges it above the water surface through the drainage pipe.

6. The assembly platform of the large-scale tidal energy power generation device according to claim 1 is characterized in that: The lower part of the main pile is poured with concrete, and the upper part is hollow, so that people can reach below the water surface through the main pile to install and fix the main pile and the nesting parts.

7. The assembly platform of the large-scale tidal energy power generation device according to claim 1 is characterized in that: The assembly platform also includes at least one suspension support column, which is a closed hollow structure. One end of the suspension support column is connected to the horizontal-axis hydro-turbine generator, so that personnel can enter the interior of the horizontal-axis hydro-turbine generator through the suspension support column, and the other end of the suspension support column leads to above the water surface.

8. The assembly platform of the large-scale tidal energy power generation device according to claim 1 is characterized in that: The assembly platform also includes a sealing device and a fixing component. The fixing component fixes the main loading pile and the nesting piece, and the sealing device is correspondingly arranged at the fixing component.

9. The assembly platform of the large-scale tidal energy power generation device according to claim 1, characterized in that: The assembly platform also includes at least two shock-absorbing devices, each of which is arranged between the nesting piece and the main supporting pile.

10. A large-scale tidal current energy power generation device, characterized in that: include: The assembly platform as claimed in any one of claims 1 to 9; At least one horizontal-axis hydro-generator, detachably mounted in the assembly platform; At least one suspension support column is a closed hollow structure, one end of the suspension support column is connected to the horizontal-axis hydro-turbine generator, so that personnel can enter the interior of the horizontal-axis hydro-turbine generator through the suspension support column, and the other end of the suspension support column leads to above the water surface.

Images