Absolute settlement monitoring device for offshore wind power foundation

Abstract

The utility model relates to and discloses an offshore wind power foundation absolute settlement monitoring device which comprises a single pile foundation, a displacement monitoring part is arranged on one side of the single pile foundation in parallel, the displacement monitoring part comprises a rotary drum and a plurality of first waterproof shells in linear connection, the tail end of the last first waterproof shell is connected with a second waterproof shell, and the tail end of the second waterproof shell is connected with a third waterproof shell. The plurality of waterproof shells I are arranged in the rotary drum, and displacement sensors are fixedly mounted in the plurality of waterproof shells I and the waterproof shell II; according to the absolute settlement monitoring device for the offshore wind power foundation, a plurality of displacement sensors are vertically and linearly arranged in a rotary drum through a plurality of first waterproof shells and a plurality of second waterproof shells, the plurality of displacement sensors are used for measuring three axial components of force acceleration in real time, and the included angle between each displacement sensor and the vertical direction and the included angle between each displacement sensor and the horizontal direction are calculated; and the displacement of a plurality of measuring points on the X coordinate axis, the Y coordinate axis and the Z coordinate axis is calculated, so that the inclination and settlement displacement conditions of the single pile foundation are monitored in real time.

Description

Technical Field

[0001] The utility model relates to the technical field of offshore wind power foundations, in particular to an absolute settlement monitoring device for offshore wind power foundations. Background Technique

[0002] Offshore wind power foundations are in a complex marine environment for a long time and bear huge forces such as wind, waves, and currents; absolute settlement monitoring can timely detect uneven settlement or excessive settlement of the foundation; if the settlement exceeds the design allowable range, it may lead to foundation inclination, tower barrel deformation, and even affect the normal operation and structural safety of the fan; for example, uneven settlement may generate additional stress on the tower barrel of the fan, reduce its bearing capacity, and increase the risk of collapse, and excessive settlement of the offshore wind power foundation may affect the verticality of the fan, and then affect the alignment degree of the impeller of the fan and the wind direction. If the impeller cannot accurately align with the wind direction, the wind energy capture efficiency will be reduced, the power generation will be reduced. In addition, the settlement may also affect the normal operation of the transmission system and electrical equipment inside the fan, further reducing the power generation efficiency; at present, the offshore wind power foundation generally measures the horizontal height between the monitoring reference point and the monitoring point through a static level to ensure that the horizontal height between the reference point and the monitoring point does not exceed the actual range of the static level.

[0003] The static level in the prior art is generally installed on the sea surface through a single-pile foundation to monitor the settlement of nearby offshore wind power foundations. However, the static level can only monitor the preset monitoring points on the monitored offshore wind power foundation, with a small monitoring range and cannot perform multi-point monitoring on the offshore wind power foundation; in view of this, this paper proposes an absolute settlement monitoring device for offshore wind power foundations. Content of the Utility Model

[0004] The purpose of the utility model is to solve the problem that the static level used for monitoring the lifting of offshore wind power foundations in the prior art can only monitor the preset monitoring points on the monitored offshore wind power foundation, with a small monitoring range and cannot perform multi-point monitoring on the offshore wind power foundation, and proposes an absolute settlement monitoring device for offshore wind power foundations.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme:

[0006] An absolute settlement monitoring device for offshore wind power foundations, including a single-pile foundation, and a displacement monitoring part is arranged in parallel on one side of the single-pile foundation;

[0007] The displacement monitoring unit includes a rotating cylinder and several waterproof housings I connected linearly. The rotating cylinder is rotatably connected to the single-pile foundation, and the end of the last waterproof housing I is connected to a waterproof housing II. Several waterproof housings I are all arranged inside the rotating cylinder, and displacement sensors are fixedly installed inside several waterproof housings I and the waterproof housing II. A waterproof cable is connected between the displacement sensors in every two adjacent waterproof housings I, and between the displacement sensors in the last waterproof housing I and the waterproof housing II.

[0008] Preferably, the displacement monitoring unit further includes a cylindrical barrel, which is fixedly installed parallel to one side of the single-pile foundation through several connecting seats, and the rotating cylinder is coaxially and rotatably installed in the circular hole of the cylindrical barrel.

[0009] Preferably, the upper end of the rotating cylinder is coaxially and fixedly connected with a threaded joint, and a sealing cover is threadedly connected to the outer periphery of the threaded joint, and the sealing cover and the first waterproof housing I are in mutual extrusion contact.

[0010] Preferably, several strip grooves that are mutually fitted with the inner wall of the spline hole in the rotating cylinder are arranged on the outer walls of the waterproof housing I and the waterproof housing II.

[0011] Preferably, a drill bit is coaxially and fixedly connected to the end of the waterproof housing II.

[0012] Preferably, a handwheel is coaxially and fixedly connected to the outer circle of the top end of the rotating cylinder.

[0013] Compared with the prior art, the utility model provides an absolute settlement monitoring device for an offshore wind power foundation, which has the following beneficial effects:

[0014] 1. For this absolute settlement monitoring device for an offshore wind power foundation, several displacement sensors are arranged in a vertical straight line in the rotating cylinder through several waterproof housings I and the waterproof housing II, and several displacement sensors are used to measure the components of the force acceleration in three axial directions in real time, calculate the included angles between each displacement sensor and the vertical and horizontal directions, and then calculate the displacements of multiple measuring points on the three XYZ coordinate axes, so as to achieve the real-time monitoring of the inclination and settlement displacement of the single-pile foundation.

[0015] 2. For this absolute settlement monitoring device for an offshore wind power foundation, through the drill bit coaxially arranged below the waterproof housing II and the rotating cylinder connected by fitting and sliding, the rotation synchronization between the waterproof housing II in the rotating cylinder and the rotating cylinder can be linked, so that the operator can drive the rotating cylinder and the drill bit below the waterproof housing II in the rotating cylinder to drill into the soil below the seabed by rotating the handwheel, and then cooperate with the sealing cover to vertically extrude several waterproof housings I and several waterproof cables into the rotating cylinder, so as to complete the stable setting of the displacement sensors in several waterproof housings I and the waterproof housing II without random deviation. Description of the Drawings

[0016] Figure 1 Structural schematic diagram of an absolute settlement monitoring device for an offshore wind power foundation proposed by the present utility model;

[0017] Figure 2 Structural schematic diagram of the displacement monitoring part in an absolute settlement monitoring device for an offshore wind power foundation proposed by the present utility model;

[0018] Figure 3 Structural schematic diagram of the displacement monitoring part in an absolute settlement monitoring device for an offshore wind power foundation proposed by the present utility model.

[0019] In the figure: 1, single pile foundation; 2, displacement monitoring part; 201, cylinder; 202, connecting seat; 203, strip groove; 204, drill bit; 205, round hole; 206, waterproof housing one; 207, waterproof cable; 208, sealing cover; 209, rotating cylinder; 210, hand wheel; 211, spline hole; 212, threaded joint; 213, waterproof housing two. Specific implementation manners

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0021] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0022] Refer to the attached Figures 1-3 , an absolute settlement monitoring device for an offshore wind power foundation, including a single pile foundation 1, the lower end of the single pile foundation 1 is vertically fixedly buried and installed below the seabed, the upper part of the single pile foundation 1 is higher than the sea surface, and a displacement monitoring part 2 for real-time monitoring of the vertical displacement lift and tilt offset of the single pile foundation 1 is arranged in parallel on one side of the single pile foundation 1.

[0023] In this embodiment, the displacement monitoring part 2 further includes a cylinder 201, the cylinder 201 is fixedly installed in parallel on one side of the single pile foundation 1 through a plurality of connecting seats 202, a rotating cylinder 209 is coaxially rotatably connected in a round hole 205 in the cylinder 201, a spline hole 211 is coaxially arranged in the rotating cylinder 209, and the upper and lower ends of the cylinder 201, the rotating cylinder 209 and the single pile foundation 1 are flush.

[0024] In this embodiment, the displacement monitoring unit 2 further includes a number of waterproof housings I 206 connected linearly. The rotary drum 209 is rotatably connected to the single-pile foundation 1, and the end of the last waterproof housing I 206 is connected to a waterproof housing II 213. Since the waterproof housing II 213 needs to be buried in the soil under the seabed, the length of the waterproof housing II 213 does not need to be set too long. The waterproof housing I 206 is mainly used for equidistantly installing displacement sensors, and the displacement sensors do not need to be too dense. Therefore, the length of the waterproof housing I 206 is greater than that of the waterproof housing II 213. A number of waterproof housings I 206 are all arranged in the rotary drum 209, and displacement sensors are fixedly installed in both a number of waterproof housings I 206 and the waterproof housing II 213. A waterproof cable 207 is connected between the displacement sensors in every two adjacent waterproof housings I 206, and between the displacement sensors in the last waterproof housing I 206 and the waterproof housing II 213. And both ends of each waterproof cable 207 are fixedly and sealingly connected to two waterproof housings I 206 or a waterproof housing I 206 and the waterproof housing II 213, linearly connecting a number of waterproof housings I 206 and the waterproof housing II 213 in an equidistant and flexible manner.

[0025] It should be added that in order to better monitor the lifting of the single-pile foundation 1, a space is reserved between two of the displacement sensors arranged in the rotary drum 209, that is, the waterproof cable 207 between every two adjacent waterproof housings I 206 is in a bent state and can be stretched and moved. For this purpose, a steel strip with high mechanical strength is extruded and arranged inside the outer layer of the above waterproof cable 207, so as to effectively increase the bending resistance of the waterproof cable 207.

[0026] In this embodiment, a number of strip-shaped grooves 203 that are fitted with the inner wall of the spline hole 211 in the rotary drum 209 are provided on the outer walls of the waterproof housing I 206 and the waterproof housing II 213, so that the waterproof housing I 206 or the waterproof housing II 213 can only move along the spline hole 211 in the rotary drum 209. Moreover, the rotary drum 209 and the waterproof housing I or the rotary drum 209 and the waterproof housing II 213 that are fitted and connected are also used to seal the inner cavity of the spline hole 211, minimizing the amount of seawater contacting the waterproof housing I 206 as much as possible. The end of the waterproof housing II 213 is coaxially and fixedly connected to a drill bit 204. The drill bit 204 is integrally conical, and spiral cutting teeth are arranged on the periphery of the drill bit 204. By rotating the drill bit 204, it is convenient for the spiral cutting teeth to drill into the soil under the seabed. A handwheel 210 is coaxially and fixedly connected to the outer ring at the top of the rotary drum 209.

[0027] In this embodiment, a threaded joint 212 is coaxially and fixedly connected to the upper end of the rotary drum 209. A sealing cover 208 is threadedly connected to the outer periphery of the threaded joint 212. The sealing cover 208 and the first waterproof housing 206 are in mutual extrusion contact. The waterproof cable 207 externally connected to the first waterproof housing 206 passes through the sealing cover 208 in a sealed manner. The sealing cover 208 is mainly used to cover the upper opening of the rotary drum 209. Through the drill bit 204 coaxially arranged below the second waterproof housing 213 and in cooperation with the rotatable drum 209 connected by fitting and sliding, the rotation of the second waterproof housing 213 in the rotary drum 209 can be synchronized with the rotation of the drum, so that a person can drive the rotary drum 209 and the drill bit below the second waterproof housing 213 in the rotary drum 209 to drill into the soil under the seabed by rotating the handwheel 210. Then, with the cooperation of the sealing cover 208, a plurality of the first waterproof housings 206 and a plurality of waterproof cables 207 are vertically pressed into the rotary drum 209, thereby completing the stable setting of the displacement sensors in a plurality of the first waterproof housings 206 and the second waterproof housing 213 without random deviation.

[0028] It should be added that the installation process of a plurality of the first waterproof housings 206 and the second waterproof housing 213 arranged in a linear connection is as follows:

[0029] First, the drill bit 204 at the end of the second waterproof housing 213 is inserted into the spline hole 211 in the rotary drum 209, and a plurality of connected first waterproof housings 206 are sequentially slid into the spline hole 211 until the lower end of the drill bit 204 is inserted into the soil under the seabed, and the connected waterproof cables 207 are squeezed and bent.

[0030] Then, the rotary drum 209 is rotated clockwise by the handwheel 210, and the rotating rotary drum 209 drives the second waterproof housing 213 and the drill bit 204 therein to rotate clockwise and drill into the soil under the seabed. The drill bit 204 drilled into the soil can pull down the second waterproof housing 213 until the second waterproof housing 213 is completely separated from the rotary drum 209, that is, the second waterproof housing 213 is inserted into the soil under the seabed, and a plurality of the first waterproof housings 206 are arranged in the rotary drum 209.

[0031] It can be seen that a plurality of displacement sensors arranged linearly are installed in the rotary drum 209 and in the soil under the seabed, which is the same as the principle of the segmental displacement meter in the prior art. The displacement sensors in this article specifically adopt MEMS inclination sensors, and the MEMS inclination sensors in a plurality of displacement sensors are used to measure the components of the force acceleration in three axial directions in real time, calculate the angles between each displacement sensor and the vertical and horizontal directions, and then calculate the displacements of each measuring point in the three XYZ coordinate axes, so as to realize the displacement monitoring of the absolute settlement and the displacement monitoring of the tilting and bending of the single-pile foundation 1.

[0032] In this utility model, displacement sensors in a number of waterproof housings I (206) and waterproof housings II (213) are used to measure the components of the force acceleration in three axial directions in real time, calculate the angles between each displacement sensor and the vertical and horizontal directions, and then calculate the displacements of each measuring point on the three XYZ coordinate axes, so as to achieve real-time monitoring of the inclination and settlement displacement of the single-pile foundation (1).

[0033] The above is only the preferred specific implementation mode of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present utility model.

Claims

1. An absolute settlement monitoring device for an offshore wind power foundation, comprising a single pile foundation (1), characterized in that: A displacement monitoring unit (2) is arranged in parallel on one side of the single pile foundation (1); The displacement monitoring unit (2) comprises a rotating drum (209) and a plurality of linearly connected waterproof shells (206); the rotating drum (209) is rotationally connected to the single pile foundation (1); the end of the last waterproof shell (206) is connected to a waterproof shell (213); the plurality of waterproof shells (206) are arranged in the rotating drum (209); and displacement sensors are fixedly installed in the plurality of waterproof shells (206) and the waterproof shells (213); a waterproof cable (207) is connected between the displacement sensors in every two adjacent waterproof shells (206) and between the displacement sensors in the last waterproof shell (206) and the waterproof shell (213).

2. The absolute settlement monitoring device for offshore wind power foundation according to claim 1 is characterized in that: The displacement monitoring unit (2) further comprises a cylinder (201), wherein the cylinder (201) is fixedly mounted in parallel on one side of the monopile foundation (1) via a plurality of connecting seats (202), and the rotating cylinder (209) is coaxially rotatably mounted in a circular hole (205) in the cylinder (201).

3. The absolute settlement monitoring device for offshore wind power foundation according to claim 1 is characterized in that: The upper end of the rotating drum (209) is coaxially fixedly connected with a threaded joint (212), the outer periphery of the threaded joint (212) is threadedly connected with a sealing cover (208), and the sealing cover (208) and the first waterproof shell (206) are in mutual compression contact.

4. The absolute settlement monitoring device for offshore wind power foundation according to claim 1 is characterized in that: The outer walls of the waterproof housing 1 (206) and the waterproof housing 2 (213) are both provided with a plurality of strip grooves (203) which are engaged with the inner walls of the spline holes (211) in the rotating drum (209).

5. The absolute settlement monitoring device for offshore wind power foundation according to claim 1 is characterized in that: The end of the second waterproof housing (213) is coaxially fixedly connected with a drill bit (204).

6. The absolute settlement monitoring device for offshore wind power foundation according to claim 1 is characterized by: The top outer ring of the rotating drum (209) is coaxially fixedly connected with a hand wheel (210).

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