Semi-submersible floating wind turbine integrated with wave energy generator

CN224782265UActive Publication Date: 2026-09-22SHANWEI MARINE IND RES INST
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
CN202522522649.6
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-11-27
Publication Date
2026-09-22
Estimated Expiration
2035-11-27

AI Technical Summary

Technical Problem

[0003]半潜式平台与波浪能集成的技术优势显著,波浪能与风能资源分布高度重叠,且波浪能发电时间与风电峰值存在时间差,二者协同可平滑输出曲线,减少对储能设备的依赖,在目前的实际使用过程中,若集成波浪能发电装置的半潜漂浮式风机无法适应海水不同时间段的高度变化,其运行稳定性与发电效率将受到显著影响,海水高度随潮汐周期性波动,若装置无法适应潮汐变化,将导致海水过低时波浪发电结构高于海面无法吃水,进而导致波浪能发电结构无法运行,海水高度过高时,装置又会因吃水过深而承受过大的水压与水流冲击力

Benefits of technology

[0017]综上所述,本实用新型具有以下有益效果:通过漂浮筏与适应组件的配合使用,可便于适应不同时间段海水的潮汐变化,使波浪能发电设备能够始终保持在海面之下的合适位置持续运作,防止装置无法适应海水的高度变化而无法运行,从而便于提高装置的灵活性和适用性。

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN224782265U_ABST
    Figure CN224782265U_ABST
Patent Text Reader

Abstract

The utility model discloses a kind of integrated wave energy power generation device's semi-submersible floating fan, it is related to power generation device technical field, including floating platform, the inner wall of the floating platform is fixedly connected with central tube, the outside of the central tube is provided with first power generation part, the outside of the floating platform is provided with second power generation part, the bottom of the floating platform is fixedly connected with mounting rod, the outside of the mounting rod is fixedly connected with floating raft, the inner wall of the central tube is respectively set with inlet and outlet and inlet and outlet, the utility model has following beneficial effect: by the cooperation of floating raft and adaptive assembly, it can be adapted to the tidal change of seawater in different time period, so that wave energy power generation equipment can always be kept in the appropriate position under sea surface and continuously operate, prevent device from being unable to operate due to unable to adapt to the height change of seawater, thereby facilitating to improve the flexibility and applicability of device.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] This utility model relates to the field of power generation equipment technology, and in particular to a semi-submersible floating wind turbine that integrates wave energy power generation device. Background Technology

[0002] Wave energy generation devices are equipment that convert the kinetic and potential energy of ocean waves into electrical energy. The core principle is to use wave motion to drive mechanical transmission, which concentrates the dispersed low-density wave energy into mechanical energy, and then converts it into electrical energy through a generator. Its application value is significant. Wave energy is one of the cleanest renewable energy sources with huge reserves. Its development and utilization can greatly alleviate the crisis of fossil energy depletion and reduce greenhouse gas emissions. Secondly, the device is highly adaptable. It can be fixed on the coast or near-shore platforms, or it can float in the deep sea. It is especially suitable for powering maritime buoys, fishing ports, isolated islands and marine monitoring equipment. Floating devices have been successfully used to power marine facilities. Furthermore, wave energy generation is not affected by weather and has a unique advantage in terms of stable power supply.

[0003] The technological advantages of integrating semi-submersible platforms with wave energy are significant. Wave energy and wind energy resources have highly overlapping distributions, and there is a time difference between wave energy generation time and wind power peak. The synergy between the two can smooth the output curve and reduce dependence on energy storage equipment. In current practical use, if the semi-submersible floating wind turbine integrating wave energy generation device cannot adapt to the height changes of seawater at different times, its operational stability and power generation efficiency will be significantly affected. Seawater height fluctuates periodically with the tides. If the device cannot adapt to tidal changes, the wave power generation structure will be above the sea surface and unable to draft when the seawater is too low, thus causing the wave energy generation structure to fail to operate. When the seawater height is too high, the device will be subjected to excessive water pressure and water flow impact due to excessive draft. Utility Model Content

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] A semi-submersible floating wind turbine with an integrated wave energy generation device includes a floating platform. A central pipe is fixedly connected to the inner wall of the floating platform. A first power generation component is arranged on the outer side of the central pipe. A second power generation component is arranged on the outer side of the floating platform. An installation rod is fixedly connected to the bottom of the floating platform. A floating raft is fixedly connected to the outer side of the installation rod. The inner wall of the central pipe is provided with water inlet and outlet and air inlet and outlet respectively. An adaptive component is arranged at the bottom of the floating platform.

[0007] The adaptive component includes a connecting pipe rotatably connected to the bottom of the floating platform, and a connecting rod slidably connected to the inner wall of the connecting pipe.

[0008] As a preferred embodiment of the semi-submersible floating wind turbine of the integrated wave energy power generation device of this utility model, the first power generation component includes a first generator fixedly connected to the top of the floating platform, and a first air turbine fixedly connected to the input end of the first generator.

[0009] As a preferred embodiment of the semi-submersible floating wind turbine of the integrated wave energy power generation device of this utility model, the second power generation component includes a second generator fixedly connected to the top of the floating platform, and a fixed shell is fixedly connected to the bottom of the floating platform.

[0010] As a preferred embodiment of the semi-submersible floating wind turbine of the integrated wave energy power generation device of this utility model, the second power generation component further includes a bevel gear set disposed at the input end of the second generator, the inner wall of the fixed shell is rotatably connected to a second air turbine, and the bevel gear set is disposed at one end of the second air turbine.

[0011] As a preferred embodiment of the semi-submersible floating wind turbine of the integrated wave energy power generation device of this utility model, the inner wall of the connecting pipe is provided with a limiting groove, the outer side of the connecting rod is fixedly connected to a limiting column, and the outer side of the limiting column is slidably connected to the inner wall of the limiting groove.

[0012] As a preferred embodiment of the semi-submersible floating wind turbine of the integrated wave energy power generation device of this utility model, one end of the connecting rod is rotatably connected to a fixing block, and the outside of the connecting pipe is fixedly connected to a fixing rod.

[0013] As a preferred embodiment of the semi-submersible floating wind turbine of the integrated wave energy power generation device of this utility model, the second air turbine is fixedly connected to the outer side of a positioning ring, and the outer side of the positioning ring is rotatably connected to the inner wall of the fixed shell. The inner wall of the fixed shell is fixedly connected to a limit ring, and the inner wall of the limit ring is rotatably connected to the outer side of the input end of the second generator.

[0014] As a preferred embodiment of the semi-submersible floating wind turbine of the integrated wave energy power generation device of this utility model, the top of the floating platform is fixedly connected to a protective shell, and the inner wall of the protective shell is fitted with a guide plate.

[0015] As a preferred embodiment of the semi-submersible floating wind turbine of the integrated wave energy power generation device of this utility model, wherein: a plug-in rod is fixedly connected to one side of the protective shell, and the outer side of the plug-in rod is plugged into the inner wall of the guide plate; an installation groove is provided on the inner wall of the protective shell, and the inner wall of the installation groove is slidably connected to the outer side of the guide plate.

[0016] As a preferred embodiment of the semi-submersible floating wind turbine of the integrated wave energy power generation device of this utility model, the inner wall of the guide plate is fixedly connected with a tie rod, the outer side of the mounting rod is fixedly connected with a fixing frame, and the inner wall of the fixing frame is fixedly connected to the outer side of the central tube.

[0017] In summary, this utility model has the following beneficial effects: by using the floating raft in conjunction with the adaptive components, it is easy to adapt to the tidal changes of seawater at different times, so that the wave energy power generation equipment can always be kept in a suitable position below the sea surface and continue to operate, preventing the device from failing to operate due to the inability to adapt to changes in seawater height, thereby improving the flexibility and applicability of the device. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0019] Figure 1 This is a structural diagram of a semi-submersible floating wind turbine that integrates wave energy generation devices.

[0020] Figure 2 This is a schematic diagram of the adaptive component in this utility model.

[0021] Figure 3 for Figure 2 A magnified structural diagram of point A shown.

[0022] Figure 4 This is a schematic diagram of the limiting groove in this utility model.

[0023] Figure 5 for Figure 4 A magnified structural diagram of point B is shown.

[0024] Figure 6 This is a schematic diagram of the mounting groove in this utility model.

[0025] Numbered in the diagram: 1. Floating platform; 2. Central pipe; 3. First power generation component; 31. First generator; 32. First air turbine; 4. Second power generation component; 41. Second generator; 42. Fixed shell; 43. Bevel gear set; 44. Second air turbine; 5. Mounting rod; 6. Floating raft; 7. Water inlet / outlet; 8. Air inlet / outlet; 9. Adaptive component; 91. Connecting pipe; 92. Connecting rod; 10. Limiting groove; 11. Limiting post; 12. Fixing block; 13. Fixing rod; 14. Positioning ring; 15. Limiting ring; 16. Protective shell; 17. Guide plate; 18. Insertion rod; 19. Mounting groove; 20. Tie rod; 21. Fixing frame. Detailed Implementation

[0026] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0027] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0028] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0029] Example 1:

[0030] Reference Figures 1-6 This is the first embodiment of the present invention. This embodiment provides a semi-submersible floating wind turbine with an integrated wave energy power generation device, including a floating platform 1. A central pipe 2 is fixedly connected to the inner wall of the floating platform 1. A first power generation component 3 is provided on the outer side of the central pipe 2. A second power generation component 4 is provided on the outer side of the floating platform 1. An installation rod 5 is fixedly connected to the bottom of the floating platform 1. A floating raft 6 is fixedly connected to the outer side of the installation rod 5. The inner wall of the central pipe 2 is provided with a water inlet / outlet 7 and an air inlet / outlet 8. An adaptive component 9 is provided at the bottom of the floating platform 1.

[0031] The floating platform 1 serves as the main load-bearing structure of the semi-submersible floating wind turbine of the entire integrated wave energy power generation device. It provides the installation foundation and support for other components, enabling the entire device to float stably in the marine environment and ensuring the coordinated operation of all components. The central pipe 2 is connected to the outside seawater through the inlet / outlet 7 and to the outside air through the air inlet / outlet 8. Waves push seawater into the central pipe 2 through the inlet / outlet 7, compressing the internal air and expelling it through the air inlet / outlet 8, forming an airflow. When the waves recede, seawater flows out of the central pipe 2, creating negative pressure, which allows outside air to enter the central pipe 2 through the air inlet / outlet 8. This cycle forms a continuous airflow. The first power generation component 3 converts the kinetic energy of the airflow compressed by the seawater in the central pipe 2 into mechanical energy. The second power generation component 4 converts the kinetic energy of the wind into mechanical energy. The mounting rod 5 provides an installation position for the floating raft 6 and the fixed frame 21, serving as a connection and support. The floating raft 6 provides the entire device with... The buoyancy of the inlet / outlet 6 is designed to adapt to different sea surface heights, ensuring that the inlet / outlet 7 is always below sea level. This allows seawater in the central tube 2 to continuously flow in and out using the kinetic energy of ocean waves, thus ensuring the continuous operation of the first power generation component 3. It should be noted that the outer shell of the floating raft 6 is made of fiberglass reinforced plastic for corrosion resistance and lightweight, the core material is foam or polyurethane foam for high buoyancy, and the protective layer is a polyurea coating or epoxy resin to enhance impact resistance and wear resistance. The inlet / outlet 7, in conjunction with the air inlet / outlet 8, provides a channel for the entry and exit of seawater and air. This allows the air in the central tube 2 to be compressed by the kinetic energy of seawater, or the air outside the central tube 2 to be drawn into the central tube 2 by negative pressure when seawater flows out, thereby achieving stable operation of the first power generation component 3. The adaptive component 9 can limit the floating platform 1 to prevent it from drifting away with the ocean current, and adapt to the floating platform 1 as it floats with the sea surface height, preventing the inlet / outlet 7 from being higher than the sea surface, thus preventing seawater from entering the central tube 2.

[0032] The adaptive component 9 includes a connecting pipe 91 rotatably connected to the bottom of the floating platform 1, and a connecting rod 92 slidably connected to the inner wall of the connecting pipe 91.

[0033] The coordination between the connecting pipe 91 and the connecting rod 92 allows the floating raft 6 to adjust its position by sliding against each other as the sea surface fluctuates, thereby achieving adaptive adjustment and preventing the inlet / outlet 7 from being higher than the sea surface, which would prevent seawater from entering the central pipe 2, or the seawater from being too high and submerging the inlet / outlet 8.

[0034] Example 2:

[0035] This is the second embodiment of the present invention, which is based on the previous embodiment.

[0036] Specifically, the first power generation component 3 includes a first generator 31 fixedly connected to the top of the floating platform 1, and a first air turbine 32 fixedly connected to the input end of the first generator 31.

[0037] The first generator 31 is configured to convert the mechanical energy transmitted from the first air turbine 32 into electrical energy, thereby realizing the power generation function. The first air turbine 32 is configured to be driven to rotate by the air flow at the air inlet and outlet 8 of the central pipe 2, thereby converting the kinetic energy of the air flow into mechanical energy and providing power input for the first generator 31.

[0038] Specifically, the second power generation component 4 includes a second generator 41 fixedly connected to the top of the floating platform 1, and a fixed shell 42 fixedly connected to the bottom of the floating platform 1.

[0039] The second generator 41 is configured to convert the mechanical energy transmitted through the bevel gear set 43 into electrical energy, which together with the first generator 31 provides power to the device. The fixed housing 42 is configured to protect the bevel gear set 43 and at the same time provide a support point for the installation of the second air turbine 44.

[0040] Specifically, the second generator 4 also includes a bevel gear set 43 disposed at the input end of the second generator 41, and a second air turbine 44 is rotatably connected to the inner wall of the fixed housing 42, with the bevel gear set 43 disposed at one end of the second air turbine 44.

[0041] The bevel gear set 43 can change and transmit the rotation direction and transmission mode of the second air turbine 44, so that the rotation of the second air turbine 44 can effectively drive the second generator 41 to generate electricity. The second air turbine 44 can utilize the air flow in the marine environment to drive its rotation, converting air kinetic energy into mechanical energy, which is transmitted to the second generator 41 through the bevel gear set 43 to realize the power generation function. It should be noted that the bevel gear set 43 consists of two meshing bevel gears, one fixedly connected to the input end of the second generator 41, and the other fixed to one end of the second air turbine 44.

[0042] Specifically, a limiting groove 10 is provided on the inner wall of the connecting pipe 91, and a limiting post 11 is fixedly connected to the outer side of the connecting rod 92, and the outer side of the limiting post 11 is slidably connected to the inner wall of the limiting groove 10.

[0043] The use of the limiting groove 10 and the limiting post 11 together can prevent the connecting rod 92 from sliding out of the connecting tube 91, thus ensuring the structural stability and normal operation of the adaptive component 9.

[0044] Specifically, a fixing block 12 is rotatably connected to one end of the connecting rod 92, and a fixing rod 13 is fixedly connected to the outside of the connecting tube 91.

[0045] The fixing block 12 can be used to fix the device on the seabed in a suitable position to prevent the device from being swept away by the waves. The fixing rod 13 can connect the two sets of connecting pipes 91 on the same side, thereby facilitating the improvement of the stability of the floating platform 1.

[0046] Specifically, a positioning ring 14 is fixedly connected to the outer side of the second air turbine 44, and the outer side of the positioning ring 14 is rotatably connected to the inner wall of the fixed housing 42. A limit ring 15 is fixedly connected to the inner wall of the fixed housing 42, and the inner wall of the limit ring 15 is rotatably connected to the outer side of the input end of the second generator 41.

[0047] The positioning ring 14 is used to position the second air turbine 44, ensuring that the second air turbine 44 rotates within the fixed housing 42 and preventing it from shifting during rotation, which could cause the two bevel gears in the bevel gear set 43 to separate. The limiting ring 15 is used to limit the input end of the second generator 41, ensuring the stability of the input end of the second generator 41 during power transmission and preventing it from experiencing excessive displacement or shaking due to force or rotation, thus ensuring the smooth operation of the power generation process.

[0048] Specifically, a protective shell 16 is fixedly connected to the top of the floating platform 1, and a guide plate 17 is snapped into the inner wall of the protective shell 16.

[0049] The protective shell 16 provides installation space for the guide plate 17 and protects the first generator 31 and the second generator 41. The guide plate 17 can guide some rainwater from the floating platform 1 into the sea, preventing rainwater or seawater from damaging the first generator 31 and the second generator 41.

[0050] Example 3:

[0051] This is the third embodiment of the present invention, which is based on the first two embodiments.

[0052] Specifically, a plug rod 18 is fixedly connected to one side of the protective shell 16, and the outer side of the plug rod 18 is plugged into the inner wall of the guide plate 17. An installation groove 19 is provided on the inner wall of the protective shell 16, and the inner wall of the installation groove 19 is slidably connected to the outer side of the guide plate 17.

[0053] The plug rod 18 is designed to fix and position the guide plate 17, preventing the guide plate 17 from falling off and losing its guiding function for seawater and rainwater. The mounting groove 19 is designed to provide guidance for the installation and removal of the guide plate 17. When removing the guide plate 17, simply push the guide plate 17 to slide along the mounting groove 19 until it is separated from the plug rod 18. Then pull the guide plate 17 to remove it from the mounting groove 19.

[0054] Specifically, a pull rod 20 is fixedly connected to the inner wall of the guide plate 17, and a fixing bracket 21 is fixedly connected to the outer side of the mounting rod 5, and the inner wall of the fixing bracket 21 is fixedly connected to the outer side of the central tube 2.

[0055] The pull rod 20 allows operators to easily pull and adjust the position of the guide plate 17 when maintenance and inspection of the first generator 3 and the second generator 4 are required. The fixed frame 21 enhances the stability of the central pipe 2 in the device, ensuring that the central pipe 2 will not shake or shift due to the impact of seawater during the operation of the device, and ensuring the normal operation of the inlet / outlet 7 and the air inlet / outlet 8.

[0056] In use, the device is first installed in a suitable position using the fixing block 12. The connecting pipe 91 and connecting rod 92 slide against each other until the floating raft 6 contacts the sea surface. Simultaneously, the inlet / outlet 7 of the central pipe 2 is submerged. When the waves propel the seawater, it enters the central pipe 2 through the inlet / outlet 7, thus displacing the air inside. The airflow in the central pipe 2 is discharged through the air inlet / outlet 8, thereby using the kinetic energy of the airflow to drive the first air turbine 32 to rotate, thus supplying power to the first generator 31. After the waves recede, the seawater in the central pipe 2 will naturally flow out due to the lack of thrust. Simultaneously, the outflow of seawater... Negative pressure causes the air around the air inlet / outlet 8 to enter the central pipe 2, thereby driving the first air turbine 32 to rotate again through the kinetic energy of the airflow. At this time, the first generator 3 can complete its work. When the sea breeze is strong, the kinetic energy of the sea breeze will directly drive the second air turbine 44 to rotate. At this time, the second air turbine 44 drives the bevel gear set 43 to rotate, thereby supplying power to the second generator 41. When it is necessary to perform maintenance on the first generator 3 and the second generator 4, first push the guide plate 17 to slide along the mounting groove 19 until it is disengaged from the plug rod 18. Then pull the guide plate 17 to disengage it from the mounting groove 19. After that, the pull rod 20 can be pulled to remove the guide plate 17 for maintenance.

[0057] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A semi-submersible floating wind turbine integrating wave energy generation device, comprising a floating platform (1), characterized in that: The inner wall of the floating platform (1) is fixedly connected to a central pipe (2), a first power generation component (3) is provided on the outer side of the central pipe (2), a second power generation component (4) is provided on the outer side of the floating platform (1), an installation rod (5) is fixedly connected to the bottom of the floating platform (1), a floating raft (6) is fixedly connected to the outer side of the installation rod (5), an inlet and outlet (7) and an air inlet and outlet (8) are respectively opened on the inner wall of the central pipe (2), and an adaptive component (9) is provided at the bottom of the floating platform (1). The adaptive component (9) includes a connecting pipe (91) rotatably connected to the bottom of the floating platform (1), and a connecting rod (92) is slidably connected to the inner wall of the connecting pipe (91).

2. The semi-submersible floating wind turbine with integrated wave energy generation device as described in claim 1, characterized in that: The first power generation unit (3) includes a first generator (31) fixedly connected to the top of the floating platform (1), and the input end of the first generator (31) is fixedly connected to a first air turbine (32).

3. The semi-submersible floating wind turbine with integrated wave energy generation device as described in claim 1, characterized in that: The second power generation component (4) includes a second generator (41) fixedly connected to the top of the floating platform (1), and a fixed shell (42) is fixedly connected to the bottom of the floating platform (1).

4. The semi-submersible floating wind turbine with integrated wave energy generation device as described in claim 3, characterized in that: The second generator (4) also includes a bevel gear set (43) disposed at the input end of the second generator (41), and the inner wall of the fixed housing (42) is rotatably connected to a second air turbine (44), and the bevel gear set (43) is disposed at one end of the second air turbine (44).

5. The semi-submersible floating wind turbine of the integrated wave energy power generation device as described in claim 1, characterized in that: The inner wall of the connecting pipe (91) is provided with a limiting groove (10), and the outer side of the connecting rod (92) is fixedly connected to a limiting post (11), and the outer side of the limiting post (11) is slidably connected to the inner wall of the limiting groove (10).

6. The semi-submersible floating wind turbine with integrated wave energy generation device as described in claim 1, characterized in that: One end of the connecting rod (92) is rotatably connected to a fixing block (12), and the outside of the connecting tube (91) is fixedly connected to a fixing rod (13).

7. The semi-submersible floating wind turbine with integrated wave energy generation device as described in claim 4, characterized in that: A positioning ring (14) is fixedly connected to the outer side of the second air turbine (44), and the outer side of the positioning ring (14) is rotatably connected to the inner wall of the fixed shell (42). A limit ring (15) is fixedly connected to the inner wall of the fixed shell (42), and the inner wall of the limit ring (15) is rotatably connected to the outer side of the input end of the second generator (41).

8. The semi-submersible floating wind turbine of the integrated wave energy power generation device as described in claim 1, characterized in that: The top of the floating platform (1) is fixedly connected to a protective shell (16), and a guide plate (17) is snapped into the inner wall of the protective shell (16).

9. The semi-submersible floating wind turbine of the integrated wave energy power generation device as described in claim 8, characterized in that: A plug rod (18) is fixedly connected to one side of the protective shell (16), and the outer side of the plug rod (18) is inserted into the inner wall of the guide plate (17). An installation groove (19) is provided on the inner wall of the protective shell (16), and the inner wall of the installation groove (19) is slidably connected to the outer side of the guide plate (17).

10. The semi-submersible floating wind turbine of the integrated wave energy power generation device as described in claim 9, characterized in that: A pull rod (20) is fixedly connected to the inner wall of the guide plate (17), and a fixing frame (21) is fixedly connected to the outer side of the mounting rod (5), and the inner wall of the fixing frame (21) is fixedly connected to the outer side of the central tube (2).