Sacrificial anode testing device for foundation of offshore wind turbine generator

Abstract

An offshore wind turbine generator foundation sacrificial anode testing device comprises a motor, an output shaft of the motor penetrates into an electric slip ring after penetrating through a winding drum, a measuring cable is wound on the winding drum, one end, wound on the winding drum, of the measuring cable is electrically connected with a rotating terminal of the electric slip ring, and the other end of the measuring cable is electrically connected with a reference electrode after bypassing a meter counter. A fixed terminal of the electric slip ring is electrically connected with a voltage measurement controller, the voltage measurement controller is electrically connected with a voltage display, the voltage measurement controller is also connected with a loop cable, a motor controller is electrically connected with a motor, and a meter counting control display is electrically connected with a meter counter. The measuring cable is wound on the winding drum for winding and unwinding, so that the measuring cable is convenient to wind and unwind during use, the measuring cable is electrically connected with the reference electrode after winding around the meter counter, and the length of the cable can be measured in the unwinding process, so that the length of the reference electrode placed in water can be obtained through the meter counting control display.

Description

Technical Field

[0001] The utility model relates to the technical field of offshore wind turbine foundation detection equipment, in particular to an offshore wind turbine foundation sacrificial anode testing device. Background Art

[0002] At present, there are many forms of foundations for offshore wind turbines in my country, which can be divided into reinforced concrete caps or steel pipe pile foundations according to the materials used. Compared with the foundations of inland wind turbines, the corrosion phenomenon of offshore wind turbine foundations is more serious due to seawater immersion and alternating dry and wet conditions. At the same time, the working conditions at sea are complex and maintenance is difficult, so the requirements for anti-corrosion protection design are particularly strict. Wind farms generally eliminate local corrosion and prevent further corrosion expansion through timely and proper anti-corrosion coating maintenance, but mechanical damage to the coating is inevitable during the actual operation and maintenance process, and the coating is difficult to detect in the early stage of damage. Therefore, it is necessary to adopt appropriate protection methods to slow down the corrosion rate of the foundation piles.

[0003] The steel pipe piles of offshore wind turbines are generally tens of meters long, and their lower sections are wedged in the seabed. The anti-corrosion of steel structures relies on paint coating to isolate them from the corrosive media in the marine environment. The corrosion of the steel structure of the wind turbine by seawater is essentially an electrochemical reaction. In the electrolyte solution, steel is an iron-carbon alloy with a carbon content of 0.02% to 2.11%. The iron element constitutes the anode and is oxidized to form rust, and the cementite constitutes the cathode to undergo a reduction reaction. At the same time, the coating of the wind turbine foundation steel piles is completed before piling. The damage to the coating is inevitable during the process of driving the foundation steel pipe into the seabed soil layer. If damaged, it will be very difficult to repair, which makes cathodic protection an important anti-corrosion means for the middle section of the steel pile. At present, cathodic protection is the only means of anti-corrosion for the lower section of the steel pile in the seabed soil layer of offshore wind turbines. Zinc and aluminum are usually used as sacrificial anode materials in seawater. In order to effectively and timely discover the corrosion of the steel pile foundation of offshore wind turbines, the sacrificial anode test of offshore wind turbines is a must-do item in the annual unit inspection work.

[0004] At present, in the operation and maintenance of offshore wind power, the annual sacrificial anode test of the steel pile foundation of offshore wind turbines is completed by using a combination of a multimeter, copper sulfate or high-purity zinc reference electrode, and test wires. It is inconvenient to carry the test tools up and down the foundation of the offshore wind turbine, to release and reel in the wires during use, and it is unclear how deep to put the copper sulfate or high-purity zinc reference electrode. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a sacrificial anode testing device for offshore wind turbine foundation, so as to solve the problems of inconvenience in laying out and reeling in the wires during the use of the current testing tools and unclear depth of the reference electrode in water.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is: a sacrificial anode test device for the foundation of an offshore wind turbine unit, including a motor, a reference electrode, an electric slip ring, a meter, a meter control display, a voltage measurement controller, a voltage display and a motor controller. The output shaft of the motor passes through a drum and then inserts into the electric slip ring. A measuring cable is wound on the drum. One end of the measuring cable wound on the drum is electrically connected to a rotating terminal of the electric slip ring, and the other end is electrically connected to the reference electrode after bypassing the meter. The fixed terminal of the electric slip ring is electrically connected to the voltage measurement controller, the voltage measurement controller is electrically connected to the voltage display, and a loop cable is also connected to the voltage measurement controller. The motor controller is electrically connected to the motor, and the meter control display is electrically connected to the meter.

[0007] It also includes a storage battery, which is electrically connected to the motor controller, the meter control display and the voltage measurement controller respectively.

[0008] The storage battery is electrically connected to the input end of the main switch, and the output end of the main switch is electrically connected to the motor controller, the meter control display and the voltage measurement controller respectively.

[0009] The output end of the main switch is electrically connected to the input end of the step-down module, and the output end of the step-down module is electrically connected to the voltage measurement controller.

[0010] A charger is also included, and the charger is used to charge the battery.

[0011] It also includes a box body, wherein a partition is arranged in the box body, and a meter control display, a voltage display, a main switch and a motor controller are installed on the partition. The motor, the reel, the electric slip ring and the meter are installed below the partition in the box body. A window is arranged on the box body at the position corresponding to the reel, and one end of the measuring cable connected to the reference electrode passes through the window; a charging interface is also arranged on the partition, and the charging interface is electrically connected to the battery. After the charger is connected to the charging interface, the battery is charged.

[0012] The motor and the electric slip ring are respectively installed in the box through mounting seats.

[0013] A placement groove for accommodating the reference electrode is arranged in the window, and an opening and closing door is installed on the window, and the opening and closing door is used to close the window.

[0014] An openable and closable box cover is arranged on the upper side of the box body.

[0015] The utility model has the following beneficial effects:

[0016] 1. The present invention winds the measuring cable on a reel for retraction and release, thereby facilitating the retraction and release of the measuring cable during use, and the measuring cable is electrically connected to the reference electrode after being wound around the meter. During the release process, the length of the cable can be measured, so that the length of the reference electrode placed in water can be obtained through the meter control display.

[0017] 2. The present invention also includes a box body, a partition is arranged in the box body, a meter control display, a voltage display, a main switch and a motor controller are installed on the partition, the motor, the reel, the electric slip ring and the meter are installed under the partition in the box body, a window is arranged on the box body at the position corresponding to the reel, and one end of the measuring cable connected to the reference electrode passes through the window, so that the test device is easy to carry. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0019] Figure 1 It is a schematic diagram of the principle of the utility model.

[0020] Figure 2 This is a schematic diagram of the implementation structure of the utility model.

[0021] Figure 3 It is a schematic diagram of the utility model when used on site.

[0022] In the figure:

[0023] Motor 10, mounting base 11, reel 20, reference electrode 30, measuring cable 31, electric slip ring 40, meter counter 50, meter counter control display 51, voltage measurement controller 60, voltage display 61, loop cable 62, battery 70, step-down module 71, charger 72, charging interface 73, main switch 80, motor controller 90;

[0024] Box body 100 , window 101 , opening and closing door 102 , partition 110 , box cover 120 . DETAILED DESCRIPTION

[0025] Embodiment 1:

[0026] See also Figure 1A sacrificial anode testing device for offshore wind turbine foundation includes a motor 10, a reference electrode 30, an electric slip ring 40, a meter counter 50, a meter counter control display 51, a voltage measurement controller 60, a voltage display 61 and a motor controller 90. The output shaft of the motor 10 passes through a drum 20 and then passes through the electric slip ring 40. A measuring cable 31 is wound on the drum 20. One end of the measuring cable 31 wound on the drum 20 passes through a hole on the side wall of the drum 20 and is electrically connected to a rotating terminal of the electric slip ring 40. The other end of the measuring cable 31 is electrically connected to the reference electrode 30 after bypassing the meter counter 50. The fixed terminal of the electric slip ring 40 is electrically connected to the voltage measurement controller 60. The voltage measurement controller 60 is electrically connected to the voltage display 61. A loop cable 62 is also connected to the voltage measurement controller 60. The motor controller 90 is electrically connected to the motor 10. The meter counter control display 51 is electrically connected to the meter counter 50. By winding the measuring cable 31 on the reel 20 for reeling, it is convenient to reel in and out the measuring cable 31 when in use, and the measuring cable 31 is electrically connected to the reference electrode 30 after being wrapped around the meter 50. During the unwinding process, the length of the cable can be measured, so that the length of the reference electrode 30 placed in water can be obtained through the meter control display 51.

[0027] In this embodiment, the reference electrode 30 is a copper sulfate reference electrode or a high-purity zinc reference electrode. In the process of paying out the measuring cable 31 , the reference electrode 30 also plays a role of a counterweight, thereby being able to pull the measuring cable 31 paid out from the reel 20 .

[0028] In this embodiment, the electric slip ring 40 is a MT series through-hole slip ring. When in use, the center hole slip ring of the electric slip ring 40 is connected and fixed to the output shaft of the motor 10 by bolts, and the center hole slip ring of the electric slip ring 40 rotates synchronously with the reel 20 .

[0029] In this embodiment, the structure of the meter 50 is the prior art, for example, the structure of the electronic fishing line length counter of the RTI brand is adopted. In the application of this patent, the display screen is separated from the base on which the encoder is installed, a groove wheel is installed on the rotating shaft of the encoder, and a plurality of rotating limiting rollers are arranged on the base at the circumference of the winding groove wheel, and the measuring cable 31 passes around the groove wheel. The limiting rollers limit the measuring cable 31 and prevent the measuring cable 31 from slipping out of the winding groove wheel.

[0030] In this embodiment, the meter control display 51 adopts an electronic digital display intelligent counter of model SC76A.

[0031] In this embodiment, the voltage measurement controller 60 is a DC voltage test module, for example, a DC voltage test module of model Fluke 17B.

[0032] In this embodiment, the voltage display 61 is a LED DC voltmeter.

[0033] It should be noted that the voltage measurement controller 60 and the voltage display 61 can be an integrated structure or a separate structure. When an integrated structure is adopted, a DF3-D type digital DC voltmeter can be adopted.

[0034] In this embodiment, the motor controller may be a 90PWM DC forward and reverse digital display speed control controller.

[0035] When in use, the motor controller 90, the meter control display 51 and the voltage measurement controller 60 are respectively electrically connected to a power source for power supply.

[0036] Embodiment 2:

[0037] On the basis of the first embodiment, a battery 70 is further included, and the battery 70 is electrically connected to the motor controller 90, the meter control display 51 and the voltage measurement controller 60. The battery 70 is a 6V or 12V lead-acid or lithium battery.

[0038] Furthermore, the storage battery 70 is electrically connected to the input end of the main switch 80, and the output end of the main switch 80 is electrically connected to the motor controller 90, the meter control display 51 and the voltage measurement controller 60. The main switch 80 controls the on and off of the power supply of the electrical equipment.

[0039] In one solution, since the rated voltage of the voltage measurement controller 60 is lower than 6V, the output end of the main switch 80 is electrically connected to the input end of the voltage reduction module 71, and the output end of the voltage reduction module 71 is electrically connected to the voltage measurement controller 60. Thus, the voltage of the voltage measurement controller 60 is reduced.

[0040] In this embodiment, the step-down module 71 is a DC-DC step-down module of model MUT1212.

[0041] Furthermore, a charger 72 is also included, and the charger 72 is used to charge the storage battery 70. The charger 72 is a prior art, and when used, a charger matching the voltage of the storage battery 70 needs to be selected.

[0042] Embodiment three:

[0043] Based on Example 2, see Figure 2, and also includes a box 100, a compartment 110 is provided in the box 100, and a meter control display 51, a voltage display 61, a main switch 80 and a motor controller 90 are installed on the compartment 110, and the motor 10, the reel 20, the electric slip ring 40 and the meter 50 are installed below the compartment 110 in the box 100, and a window 101 is provided on the box 100 at a position corresponding to the reel 20, and one end of the measuring cable 31 connected to the reference electrode 30 passes through the window 101, and a charging interface 73 is also provided on the compartment 110, and the charging interface 73 is electrically connected to the battery 70, and the charger 72 is connected to the charging interface 73 to charge the battery 70. Through the above, the test device is easy to carry. The window 101 can be set at the bottom of the box 100, or it can be set on the side of the box 100.

[0044] It should be noted that the loop cable 62 can pass through the side wall of the box 100 or the partition 110. In order to connect the loop cable 62 to the terminal on the wind turbine tower, a jumper clip is installed at the end of the loop cable 62.

[0045] For details, see Figure 1 The motor 10 and the electric slip ring 40 are respectively installed in the box 100 through the mounting seat 11. The mounting seat 11 has a clamp structure of two half rings, wherein the lower half ring is connected and fixed to the inner wall of the box 100, and the upper half ring tightly holds the motor 10 or the electric slip ring 40 through bolts. During installation, the meter 50 is located at the lower side or the front and rear sides of the reel 20.

[0046] The mounting seat 11 may be installed in the box body 100 later, or may be pre-set in the box body 100 .

[0047] For further information, see Figure 1 The window 101 is provided with a placement groove for accommodating the reference electrode 30, and the window 101 is provided with an opening and closing door 102, which is used to close the window 101, so as to facilitate the storage of the reference electrode 30. When in use, a round hole is provided at the bottom of the placement groove, and the measuring cable 31 passes through the round hole. The opening and closing door 102 can be adopted Figure 2 The side sliding structure described in the above can also adopt a flip-over and buckle-matching structure.

[0048] Furthermore, an openable and closable box cover 120 is provided on the upper side of the box body 100, which is convenient for carrying and waterproof.

[0049] The working principle or action process of the utility model is as follows:

[0050] See also Figure 3When testing the sacrificial anode of the offshore wind turbine foundation, after placing the box 100, connect the loop cable 62 to the terminal on the wind turbine tower, turn on the main switch 80, and control the motor 10 to reverse through the motor controller 90, drive the reel 20 to reverse, so as to release the measuring cable 31. The measuring cable 31 approaches the water surface under the traction of the deadweight of the reference electrode 30. During the release process, the measuring cable 31 drives the groove wheel of the meter counter 50 to rotate, thereby driving the encoder to rotate, so that the length of the measuring cable 31 released is displayed by the meter control display 51. When the reference electrode 30 contacts the water surface, at this time, the length value L1 on the meter control display 51 is recorded. When the reference electrode 30 is required to be 5 meters below the sea level, when the value recorded on the meter control display 51 is L1+5, it means that the reference electrode 30 is 5 meters below the sea level, and so on.

[0051] When the reference electrode 30 contacts the water surface, the loop cable 62 forms a loop with the reference electrode 30, and the DC voltage data of the reference electrode 30 at 1 meter, 2 meters, 3 meters, 4 meters, and 5 meters below sea level are displayed through the voltage display 61. When the voltage value measured at the specified depth is greater than the design threshold, it means that the sacrificial anode is damaged, otherwise it can continue to be used.

[0052] After the test is completed, the motor controller 90 controls the motor 10 to rotate forward, driving the reel 20 to rotate forward, thereby winding the measuring cable 31 .

Claims

1. Offshore wind turbine foundation sacrificial anode test device, characterized by: The invention comprises a motor (10), a reference electrode (30), an electric slip ring (40), a meter counter (50), a meter counter control display (51), a voltage measurement controller (60), a voltage display (61) and a motor controller (90). The output shaft of the motor (10) passes through a reel (20) and then passes through the electric slip ring (40). A measuring cable (31) is wound around the reel (20). One end of the measuring cable (31) wound around the reel (20) is electrically connected to a rotating terminal of the electric slip ring (40), and the other end of the measuring cable (31) is electrically connected to the reference electrode (30) after passing around the meter counter (50). The fixed terminal of the electric slip ring (40) is electrically connected to the voltage measurement controller (60). The voltage measurement controller (60) is electrically connected to the voltage display (61). A loop cable (62) is also connected to the voltage measurement controller (60). The motor controller (90) is electrically connected to the motor (10), and the meter counter control display (51) is electrically connected to the meter counter (50).

2. The offshore wind turbine foundation sacrificial anode testing device according to claim 1, characterized in that: It also includes a storage battery (70), which is electrically connected to the motor controller (90), the meter control display (51), and the voltage measurement controller (60).

3. The offshore wind turbine foundation sacrificial anode testing device according to claim 2, characterized in that: The storage battery (70) is electrically connected to an input end of a main switch (80), and an output end of the main switch (80) is electrically connected to a motor controller (90), a meter control display (51), and a voltage measurement controller (60), respectively.

4. The offshore wind turbine foundation sacrificial anode testing device according to claim 3, characterized in that: The output end of the main switch (80) is electrically connected to the input end of the voltage reduction module (71), and the output end of the voltage reduction module (71) is electrically connected to the voltage measurement controller (60).

5. The offshore wind turbine foundation sacrificial anode testing device according to claim 3 or 4, characterized in that: A charger (72) is also included, and the charger (72) is used to charge the storage battery (70).

6. The offshore wind turbine foundation sacrificial anode testing device according to claim 5, characterized in that: The invention also comprises a box (100), wherein a partition (110) is provided in the box (100), a meter control display (51), a voltage display (61), a main switch (80) and a motor controller (90) are installed on the partition (110), and the motor (10), the reel (20), the electric slip ring (40) and the meter (50) are installed below the partition (110) in the box (100). A window (101) is provided on the box (100) at a position corresponding to the reel (20), and one end of the measuring cable (31) connected to the reference electrode (30) passes through the window (101); and a charging interface (73) is also provided on the partition (110), and the charging interface (73) is electrically connected to the storage battery (70). After the charger (72) is connected to the charging interface (73), the storage battery (70) is charged.

7. The offshore wind turbine foundation sacrificial anode testing device according to claim 6, characterized in that: The motor (10) and the electric slip ring (40) are respectively mounted in the box (100) via mounting seats (11).

8. The offshore wind turbine foundation sacrificial anode testing device according to claim 6, characterized in that: A placement groove for accommodating the reference electrode (30) is provided in the window (101), and an opening and closing door (102) is installed on the window (101), and the opening and closing door (102) is used to close the window (101).

9. The offshore wind turbine foundation sacrificial anode testing device according to claim 6, characterized in that: An openable and closable box cover (120) is provided on the upper side of the box body (100).

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