Photovoltaic support and control method thereof

Abstract

The invention discloses a photovoltaic support and a control method thereof, and belongs to the technical field of photovoltaics. The photovoltaic support comprises: a column; the bearing seat is mounted at the upper end of the stand column; the rotating part comprises a bearing pivotally mounted on the bearing seat and a main shaft mounted on the bearing; the limiting device is installed on the stand column, moves between the first position and the second position and is used for being matched with the rotating part in a limiting mode at the second position. According to the technical scheme, the movable limiting device is arranged on the photovoltaic support, and the limiting device can be in limiting fit with the rotating part when the main shaft of the rotating part generates abnormal torsion and the torsion angle is larger than a certain condition, so that damage or unnecessary offset caused by the torsion of the main shaft is reduced.

Description

Technical Field

[0001] This application belongs to the field of photovoltaic technology, and in particular relates to a photovoltaic support structure and its control method. Background Technology

[0002] Photovoltaic tracking brackets primarily use the rotation of a main shaft to drive photovoltaic modules to follow the sun. However, uneven wind loads acting on different parts of the main shaft can easily cause torsion, and when the torsional frequency of the main shaft matches the wind frequency, torsional instability may occur, posing a significant safety hazard. Related technologies typically add dampers to the ends of the main shaft to increase the damping ratio and reduce the torsional rate. However, dampers are buffer devices and can only alleviate the torsion of the main shaft, leaving room for improvement. Summary of the Invention

[0003] This application aims to at least solve one of the technical problems existing in the related art. To this end, this application proposes a photovoltaic support bracket and its control method, which can reduce damage or unnecessary displacement caused by spindle torsion.

[0004] In a first aspect, this application provides a photovoltaic mounting bracket, comprising:

[0005] Columns;

[0006] The bearing housing is installed at the upper end of the column;

[0007] The rotating part includes a bearing pivotally mounted in the bearing housing and a main shaft mounted in the bearing;

[0008] A limiting device is installed on the column. The limiting device moves between a first position and a second position and is used to limit the engagement with the rotating part in the second position.

[0009] In the above technical solution, by setting a movable limiting device on the photovoltaic support, the limiting device can cooperate with the limiting of the rotating part when the main shaft of the rotating part undergoes abnormal torsion and the torsion angle is greater than a certain condition, thereby reducing damage or unnecessary displacement caused by the torsion of the main shaft.

[0010] According to one embodiment of this application, the limiting device is used to limit the bearing in the second position.

[0011] According to one embodiment of this application, the bearing includes a limiting groove, the limiting device includes a limiting member, the limiting member rotates relative to the column between a first position and a second position, and the limiting member is inserted into the limiting groove at the second position.

[0012] In the above technical solution, the limiting device is matched with the bearing limiting mechanism of the rotating part.

[0013] According to one embodiment of this application, the limiting device is used to engage with the spindle in the second position.

[0014] According to one embodiment of this application, the limiting device includes a limiting member that rotates relative to the column between a first position and a second position, and the limiting member clamps the main shaft at the second position;

[0015] or;

[0016] The rotating part further includes a sleeve mounted on the main shaft, the sleeve having a locking hole, and the limiting device including a pin for moving between a first position and a second position, wherein the pin is inserted into the locking hole in the second position.

[0017] In the above technical solution, the limiting device is matched with the main shaft limiting mechanism of the rotating part.

[0018] According to one embodiment of this application, when the rotating part is in the initial position or the first deflection angle and the limiting device is in the second position, the limiting device is in a limiting engagement with the rotating part.

[0019] In the above technical solution, the rotating part can be limited at different positions during the rotation process by the limiting device, thereby achieving multi-angle limiting.

[0020] According to one embodiment of this application, the limiting device includes: a limiting drive mechanism and a limiting member, wherein the limiting drive mechanism is configured to drive the limiting member to move between a first position and a second position, and the limiting member engages with the rotating part in a limiting cooperation at the second position.

[0021] According to one embodiment of this application, the photovoltaic bracket further includes: a distance sensor mounted on the bearing seat, the bearing seat having a clearance hole facing the distance sensor, and the bearing having a plurality of grooves distributed circumferentially on the circumferential surface facing the distance sensor, the plurality of grooves having different depths, and the distance sensor being used to measure the distance to the bottom of the groove.

[0022] In the above technical solution, the bearing has multiple grooves distributed circumferentially on its circumferential surface, which helps to detect the degree of torsion of the photovoltaic bracket when it is in a high wind protection state.

[0023] According to one embodiment of this application, the plurality of grooves are symmetrically distributed with respect to the central one, and the depths of the central groove and the grooves in any direction are stepped.

[0024] In the above technical solution, the bottom of the multiple grooves forms a stepped structure, which helps the distance sensor identify the position of the rotating part.

[0025] According to one embodiment of this application, the plurality of grooves are connected as one unit, and the grooves are spaced apart from the two ends of the bearing.

[0026] In the above technical solution, the groove is spaced apart from the two ends of the bearing, which helps to reduce the impact of the groove on the bearing strength.

[0027] According to one embodiment of this application, the circumferential surface of the bearing is further provided with a plurality of observation marks distributed circumferentially.

[0028] In the above technical solution, the bearing has multiple observation marks distributed circumferentially on its circumferential surface, which helps to detect the degree of torsion of the photovoltaic support when it is not under high wind protection.

[0029] Secondly, this application provides a control method for a photovoltaic support, the photovoltaic support comprising: a detection device, a rotating part, and a limiting device, wherein when the photovoltaic support is in a high wind protection state, the deflection value of the rotating part is obtained;

[0030] When it is determined that the deflection value of the rotating part reaches the first target value, the limiting device is controlled to move to the second position and cooperate with the limiting of the rotating part.

[0031] According to one embodiment of this application, after controlling the limiting device to move to the second position and engaging with the rotating part in a limiting manner, the method further includes:

[0032] After the first target duration, if it is determined that the deflection value of the rotating part is greater than the first target value but not greater than the second target value, a first-level instability alarm is output;

[0033] and / or;

[0034] After the first target duration, if it is determined that the deflection value of the rotating part is greater than the second target value and less than the third target value, a second-level instability alarm is output;

[0035] and / or;

[0036] After the first target duration, if the deflection value of the rotating part is determined to be greater than or equal to the third target value, a level three instability alarm is output.

[0037] According to one embodiment of this application, the photovoltaic support further includes observation markers, and when the photovoltaic support is in a non-strong wind protection state, the time difference between two adjacent observation markers sensed by the detection device is obtained;

[0038] If the time difference reaches the second target duration, the photovoltaic support is controlled to stop rotating and a fault alarm is output.

[0039] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0040] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0041] Figure 1 This is one of the structural schematic diagrams of the photovoltaic support provided in the embodiments of this application;

[0042] Figure 2 This is the second structural schematic diagram of the photovoltaic support provided in the embodiments of this application;

[0043] Figure 3 This is an exploded view of the photovoltaic support provided in the embodiments of this application;

[0044] Figure 4 This is the third structural schematic diagram of the photovoltaic support provided in the embodiments of this application;

[0045] Figure 5 This is the fourth structural schematic diagram of the photovoltaic support provided in the embodiments of this application;

[0046] Figure 6 This is the fifth structural schematic diagram of the photovoltaic support provided in the embodiments of this application;

[0047] Figure 7 This is the sixth schematic diagram of the photovoltaic support structure provided in the embodiments of this application;

[0048] Figure 8 This is the seventh schematic diagram of the photovoltaic support structure provided in the embodiments of this application;

[0049] Figure 9 This is the eighth schematic diagram of the photovoltaic support structure provided in the embodiments of this application;

[0050] Figure 10 This is the ninth structural schematic diagram of the photovoltaic support provided in the embodiments of this application;

[0051] Figure 11 This is the tenth schematic diagram of the structure of the photovoltaic support provided in the embodiments of this application;

[0052] Figure 12 This is eleventh of the structural schematic diagrams of the photovoltaic support provided in the embodiments of this application;

[0053] Figure 13This is the twelfth schematic diagram of the structure of the photovoltaic support provided in the embodiments of this application;

[0054] Figure 14 This is the thirteenth structural schematic diagram of the photovoltaic support provided in the embodiments of this application;

[0055] Figure 15 This is one of the flowcharts of the control method for photovoltaic brackets provided in the embodiments of this application;

[0056] Figure 16 This is the second flowchart of the control method for the photovoltaic bracket provided in the embodiments of this application.

[0057] Figure label:

[0058] Photovoltaic bracket 1;

[0059] Column 10, connector 110;

[0060] Bearing housing 20, clearance hole 210;

[0061] Rotating part 30;

[0062] Bearing 40, upper bearing 410, groove 411, observation mark 412, lower bearing 420, limiting groove 430;

[0063] Main spindle 50, sleeve 510, locking hole 511;

[0064] Limiting device 60, limiting component 610, limiting rod 611, clamping component 612, pin 613, limiting drive mechanism 620;

[0065] Distance sensor 70. Detailed Implementation

[0066] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0067] This application aims to at least solve one of the technical problems existing in the related art. To this end, this application proposes a photovoltaic support bracket and its control method, which can reduce damage or unnecessary displacement caused by spindle torsion.

[0068] The following is for reference. Figures 1-16 A photovoltaic bracket 1 according to an embodiment of this application is described.

[0069] like Figure 1As shown, the photovoltaic support 1 includes a column 10, a bearing seat 20, a rotating part 30, and a limiting device 60. The bearing seat 20 is installed on the upper end of the column 10. The rotating part 30 includes a bearing 40 pivotally installed on the bearing seat 20 and a main shaft 50 installed on the bearing 40. The limiting device 60 is installed on the column 10 and moves between a first position and a second position, and is used to limit the engagement with the rotating part 30 in the second position.

[0070] Among them, the column 10 is the basic part of the photovoltaic support 1. The column 10 is responsible for supporting the weight and load of other structures of the photovoltaic support 1 and providing them with stable support. For example, the column 10 can withstand the pressure from the photovoltaic panel and the load applied by the external environment. The column 10 is usually installed vertically on the ground, and at least part of the lower end of the column 10 is buried deep in the ground to provide sufficient load-bearing capacity and stability.

[0071] The bearing housing 20 is the basic structure supporting the rotating part 30. It is mainly used to limit the axial displacement of the rotating part 30, that is, to limit the rotation of the rotating part 30 in the length direction, which helps the rotating part 30 to rotate in the appropriate position. The bearing housing 20 is installed on the upper end of the column 10 through the connector 110. The connector 110 can also provide an installation position for the limiting device 60.

[0072] The photovoltaic bracket 1 also includes a drive device, which is configured to drive the rotating part 30 to rotate circumferentially, thereby driving the photovoltaic panels mounted on the rotating part 30 to rotate. The rotating part 30 includes a bearing 40 pivotally mounted on the bearing seat 20 and a main shaft 50 mounted on the bearing 40. The main shaft 50 is dynamically coupled to the drive device. The rotation of the main shaft 50 drives the bearing 40 to rotate at the same time. There are usually multiple sets of one-to-one bearings 40 and bearing seats 20 distributed along the length direction on the same main shaft 50.

[0073] The limiting device 60 is installed on the column 10. It is mainly used to limit the range of motion of the main shaft 50 when the main shaft 50 is torn due to external environmental load, maintain the stability of the main shaft 50, and reduce the risk of the main shaft 50 becoming unstable. Under uneven wind load, different torques are generated at different positions on the main shaft 50, causing the main shaft 50 to twist. The degree of twisting also varies at different distances from the drive device. For example, the degree of twisting of the main shaft 50 gradually increases from the direction closer to the drive device to the direction farther away from the drive device. Small-scale twisting causes deformation of the main shaft 50, while large-scale twisting causes instability of the main shaft 50. At the same time, the main shaft 50 is in an oscillating state when it twists, that is, the direction of twisting of the main shaft 50 changes intermittently. For example, the main shaft 50 twists clockwise for a period of time and counterclockwise for another period of time, and the two are distributed alternately.

[0074] Furthermore, the limiting device 60 moves between the first position and the second position, and is used to limit the engagement with the rotating part 30 in the second position. When the limiting device 60 is in the initial state in the first position, it does not interfere with the rotating part 30. When the limiting device 60 is in the limiting state in the second position, it engages with the rotating part 30 to limit the engagement, thereby controlling the movement of the rotating part 30 within a controllable range and reducing damage or unnecessary deviation caused by the torsion of the main shaft 50.

[0075] In related technologies, photovoltaic tracking brackets primarily use the rotation of a main shaft 50 to drive photovoltaic modules to follow the sun. However, uneven wind loads acting on different positions of the main shaft 50 cause torque to be generated at locations on the main shaft 50 far from the drive device, leading to torsion of the main shaft 50. Furthermore, when the torsional frequency of the main shaft 50 coincides with the wind frequency, the main shaft 50 may experience torsional instability, posing a significant safety hazard. Existing technologies typically add dampers to the ends of the main shaft 50 to increase the damping ratio and reduce the torsional rate; however, dampers are buffer devices and have room for improvement.

[0076] This application provides a limiting device 60 on the photovoltaic support 1. When the main shaft 50 of the rotating part 30 undergoes abnormal torsion and the torsion angle exceeds a certain condition, the limiting device 60 engages with the rotating part 30 to limit it, fixing the rotating part 30 in the position before the torsion occurs, thereby reducing damage or unnecessary displacement caused by the torsion of the main shaft 50. At the same time, the limiting device 60 does not work when the rotating part 30 rotates normally or when the main shaft 50 of the rotating part 30 is slightly torsioned. The slight torsion of the main shaft 50 can release torsional stress, and the limiting device 60 only engages with the rotating part 30 to limit it when the torsion angle exceeds a certain condition, which can extend the service life of the limiting device 60.

[0077] According to the photovoltaic bracket 1 provided in the embodiment of this application, by setting a movable limiting device 60 on the photovoltaic bracket 1, the limiting device 60 can cooperate with the rotating part 30 to limit the rotation when the main shaft 50 of the rotating part 30 undergoes abnormal torsion and the torsion angle is greater than a certain condition, thereby reducing damage or unnecessary displacement caused by the torsion of the main shaft 50.

[0078] In some embodiments, the limiting device 60 has various structural forms, including but not limited to:

[0079] Example 1: The limiting device 60 is used to limit the engagement with the bearing 40 in the second position.

[0080] In this embodiment, such as Figures 1-5 As shown, the bearing 40 includes a limiting groove 430, and the limiting device 60 may include a limiting member 610. The limiting member 610 rotates relative to the column 10 between a first position and a second position, and the limiting member 610 is inserted into the limiting groove 430 at the second position.

[0081] like Figure 2 and Figure 3 As shown, the bearing 40 includes an upper bearing 410 and a lower bearing 420 that are spaced apart in the vertical direction. A limiting groove 430 is formed between the upper bearing 410 and the lower bearing 420. At the same time, the limiting member 610 may include a limiting rod 611. The limiting drive mechanism 620 drives the limiting rod 611 to rotate relative to the column 10 between a first position and a second position. When the limiting rod 611 is in the first position, the limiting rod 611 does not interfere with the bearing 40. When the limiting rod 611 is in the second position, the end of the limiting rod 611 is inserted into the limiting groove 430.

[0082] In addition, under the wind protection state, the main shaft 50 does not rotate, that is, the main shaft 50 forms a fixed angle with the horizontal plane under the wind protection state, while the limiting device 60 can be used at any angle. For example, when the main shaft 50 is placed horizontally or when the main shaft 50 forms a certain angle with the horizontal plane, the limiting device 60 can realize the limiting function.

[0083] like Figures 1-3 As shown, the spindle 50 forms a 0° angle with the horizontal plane. When the limiting rod 611 is in the first position, the limiting rod 611 does not interfere with the bearing 40. When the limiting rod 611 is in the second position, the end of the limiting rod 611 is inserted into the limiting groove 430.

[0084] like Figure 4 and Figure 5 As shown, the spindle 50 forms a 45° angle with the horizontal plane. When the limiting rod 611 is in the first position, the limiting rod 611 does not interfere with the bearing 40. When the limiting rod 611 is in the second position, the end of the limiting rod 611 is inserted into the limiting groove 430.

[0085] Example 2: The limiting device 60 is used to limit the engagement with the spindle 50 in the second position, and the limiting device 60 includes a limiting member 610.

[0086] In this embodiment, such as Figures 6-9 As shown, the limiting device 60 may include a limiting member 610, which rotates relative to the column 10 between a first position and a second position, and the limiting member 610 clamps the main shaft 50 in the second position.

[0087] like Figure 6 and Figure 7 As shown, the limiting member 610 may include a clamping member 612. The limiting drive mechanism 620 drives the clamping member 612 to rotate relative to the column 10 between a first position and a second position. When the clamping member 612 is in the first position, the clamping member 612 does not interfere with the spindle 50. When the clamping member 612 is in the second position, the end of the clamping member 612 clamps the spindle 50.

[0088] In addition, under the wind protection state, the main shaft 50 does not rotate, that is, the main shaft 50 forms a fixed angle with the horizontal plane under the wind protection state, while the limiting device 60 can be used at any angle. For example, when the main shaft 50 is placed horizontally or when the main shaft 50 forms a certain angle with the horizontal plane, the limiting device 60 can realize the limiting function.

[0089] like Figure 6 and Figure 7 As shown, the spindle 50 forms a 0° angle with the horizontal plane. When the clamping member 612 is in the first position, the clamping member 612 does not interfere with the spindle 50. When the clamping member 612 is in the second position, the end of the clamping member 612 clamps the spindle 50.

[0090] like Figure 8 and Figure 9 As shown, the spindle 50 forms a 45° angle with the horizontal plane. When the clamping member 612 is in the first position, the clamping member 612 does not interfere with the spindle 50. When the clamping member 612 is in the second position, the end of the clamping member 612 clamps the spindle 50.

[0091] Example 3: The limiting device 60 is used to limit the engagement with the spindle 50 in the second position, and the limiting device 60 includes a pin.

[0092] In this embodiment, such as Figures 10-13 As shown, the rotating part 30 also includes a sleeve 510 mounted on the main shaft 50. The sleeve 510 is provided with a locking hole 511. The limiting device 60 may include a pin 613 for moving between a first position and a second position, and the pin 613 is inserted into the locking hole 511 in the second position.

[0093] like Figure 10 and Figure 11 As shown, the rotating part 30 also includes a sleeve 510 mounted on the main shaft 50. The lower end of the sleeve 510 is provided with a locking hole 511. Meanwhile, the limiting member 610 may include a pin 613. The limiting drive mechanism 620 drives the pin 613 to extend and retract between a first position and a second position. When the pin 613 is in the first position, the pin 613 does not interfere with the sleeve 510 on the main shaft 50. When the pin 613 is in the second position, the pin 613 is inserted into the locking hole 511 at the bottom of the sleeve 510.

[0094] In addition, under the wind protection state, the main shaft 50 does not rotate, that is, the main shaft 50 forms a fixed angle with the horizontal plane under the wind protection state, while the limiting device 60 can be used at any angle. For example, when the main shaft 50 is placed horizontally or when the main shaft 50 forms a certain angle with the horizontal plane, the limiting device 60 can realize the limiting function.

[0095] like Figure 10 and Figure 11As shown, the spindle 50 forms a 0° angle with the horizontal plane. When the pin 613 is in the first position, the pin 613 does not interfere with the sleeve 510 on the spindle 50. When the pin 613 is in the second position, the pin 613 is inserted into the locking hole 511 at the bottom of the sleeve 510.

[0096] like Figure 12 and Figure 13 As shown, the spindle 50 forms a 45° angle with the horizontal plane. When the pin 613 is in the first position, the pin 613 does not interfere with the sleeve 510 on the spindle 50. When the pin 613 is in the second position, the pin 613 is inserted into the locking hole 511 at the bottom of the sleeve 510.

[0097] In some embodiments, such as Figures 1-5 As shown, when the rotating part 30 is in the initial position or the first deflection angle and the limiting device 60 is in the second position, the limiting device 60 and the rotating part 30 are in a limiting engagement.

[0098] In this embodiment, under the wind protection state, the main shaft 50 does not rotate, that is, the main shaft 50 forms a fixed angle with the horizontal plane under the wind protection state. For example, when the rotating part 30 is in the initial position, the main shaft 50 forms a 0° angle with the horizontal plane. When the rotating part 30 is in the first deflection angle, the main shaft 50 forms an angle with the horizontal plane that is the same as the first deflection angle.

[0099] Furthermore, when the main shaft 50 is not rotating, due to the uneven wind load applied to the main shaft 50, different torques will be generated at different positions on the main shaft 50, causing the main shaft 50 to twist. At the same time, the main shaft 50 is in an oscillating state when it twists, that is, the direction of the main shaft 50 twists changes intermittently. For example, the main shaft 50 twists in a clockwise direction for a period of time, and in a counterclockwise direction for another period of time, and the two are alternately distributed.

[0100] When the spindle 50 is in an oscillating state, the spindle 50 repeatedly passes through the initial position or the position where the first deflection angle is located. The first deflection angle is the angle formed between the spindle 50 and the horizontal plane when the spindle 50 stops rotating. The first deflection angle is not limited to a fixed value and can take a value within a certain range. The limiting device 60 and the rotating part 30 cooperate to limit the spindle 50 when it is in the initial position or the position where the first deflection angle is located.

[0101] In some embodiments, such as Figure 3 As shown, the limiting device 60 may include a limiting drive mechanism 620 and a limiting member 610. The limiting drive mechanism 620 is configured to drive the limiting member 610 to move between a first position and a second position, and the limiting member 610 engages with the rotating part 30 in a limiting cooperation at the second position.

[0102] In this embodiment, the limiting member 610 has various structural forms. For example, the limiting member 610 may include a limiting rod 611, a clamping member 612, and a pin 613. The limiting drive mechanism 620 is configured to drive the limiting member 610 to move between a first position and a second position. The limiting member 610 does not interfere with the rotating part 30 in the first position, and the limiting member 610 engages with the rotating part 30 in the second position.

[0103] In addition, the limiting member 610 can be limited and engaged with the bearing 40 of the rotating part 30 in the second position, or it can be limited and engaged with the main shaft 50 of the rotating part 30.

[0104] In some embodiments, such as Figure 3 and Figure 14 As shown, the photovoltaic bracket 1 also includes a distance sensor 70, which is mounted on the bearing seat 20. The bearing seat 20 has a clearance hole 210 facing the distance sensor 70. The bearing 40 has a plurality of grooves 411 distributed circumferentially on its circumferential surface facing the distance sensor 70. The grooves 411 have different depths, and the distance sensor 70 is used to measure the distance to the bottom of the groove 411.

[0105] In this embodiment, the bearing 40 includes an upper bearing 410 and a lower bearing 420 spaced apart in a vertical direction. The distance sensor 70 is mounted on the top of the bearing housing 20, and the bearing housing 20 is provided with a clearance hole 210 facing the distance sensor 70. The distance sensor 70 is mainly used to measure the distance from the distance sensor 70 to the top of the upper bearing 410. The upper bearing 410 has a plurality of grooves 411 distributed circumferentially on its circumferential surface facing the distance sensor 70.

[0106] In addition, the multiple grooves 411 have different depths and are connected as one unit, forming a stepped structure at the bottom of the grooves 411.

[0107] When the photovoltaic support 1 is in a strong wind protection state, the distance sensor 70 can obtain the deflection value of the rotating part 30 by measuring the distance from the distance sensor 70 to the bottom of the groove 411. For example, the distance sensor 70 can identify the groove 411 that is directly opposite the distance sensor 70 in the vertical direction through the measurement result. Grooves 411 of different depths correspond to different deflection angles, thereby determining the degree of deflection of the rotating part 30.

[0108] Understandably, the bearing 40 has multiple grooves 411 distributed circumferentially on its circumferential surface, which helps to detect the degree of torsion of the photovoltaic bracket 1 when it is in a wind protection state.

[0109] In some embodiments, such as Figure 14As shown, multiple grooves 411 are symmetrically distributed with respect to the central one, and the depth from the central groove 411 to each groove 411 in any direction is stepped.

[0110] In this embodiment, the bearing 40 has a plurality of grooves 411 distributed circumferentially on its circumferential surface facing the distance sensor 70, and the plurality of grooves 411 are symmetrically distributed with respect to the middle one. When the rotating part 30 is in the initial position or the first deflection angle, the area on the rotating part 30 corresponding to the distance sensor 70 in the vertical direction is the middle groove 411. For example, when the rotating part 30 is in the initial position, the deflection angle is zero. At this time, the distance sensor 70 measures the distance to the bottom of the middle groove 411, and the measuring area of ​​the distance sensor 70 is located in the middle part of the bottom of the middle groove 411. When the rotating part 30 is in the first deflection angle, the distance sensor 70 also measures the distance to the bottom of the middle groove 411, but at this time the measuring area of ​​the distance sensor 70 is located at the edge of the bottom of the middle groove 411.

[0111] Furthermore, the depths of the grooves 411 from the center to the grooves 411 in any direction are distributed in a stepped manner. For example, the depth of the center groove 411 is the smallest, and the depths of the other grooves 411 distributed sequentially on one side of the center groove 411 gradually increase from the center groove 411 to the grooves 411 furthest away from the center groove 411. Or, for example, the depth of the center groove 411 is the largest, and the depths of the other grooves 411 distributed sequentially on one side of the center groove 411 gradually decrease from the center groove 411 to the grooves 411 furthest away from the center groove 411.

[0112] In some embodiments, such as Figure 14 As shown, multiple grooves 411 are connected as one piece, and the grooves 411 are spaced apart from the two ends of the bearing 40.

[0113] In this embodiment, the bearing 40 has a plurality of grooves 411 distributed circumferentially on the circumferential surface facing the distance sensor 70. The grooves 411 have different depths and are connected as one unit, forming a stepped structure at the bottom of the grooves 411. The connection of the grooves 411 as one unit helps the distance sensor 70 to detect.

[0114] Furthermore, the groove 411 is spaced apart from the two ends of the bearing 40. The circumferential direction of the bearing 40 toward the peripheral surface of the distance sensor 70 is the distribution direction of the multiple grooves 411, and the axial direction of the bearing 40 toward the peripheral surface of the distance sensor 70 is the width direction of the groove 411. That is, the axial width of the bearing 40 toward the peripheral surface of the distance sensor 70 is greater than the width of the groove 411, and the groove 411 is only open on the side toward the distance sensor 70.

[0115] Understandably, the groove 411 is spaced apart from the two ends of the bearing 40, which helps to reduce the impact of the groove 411 on the strength of the bearing 40.

[0116] In some embodiments, such as Figure 14 As shown, the circumferential surface of the bearing 40 is also provided with multiple observation marks 412 distributed along the circumferential direction.

[0117] In this embodiment, the bearing 40 has a plurality of grooves 411 distributed circumferentially on its circumferential surface facing the distance sensor 70, and the bearing 40 also has a plurality of observation marks 412 distributed circumferentially spaced apart, with the outermost groove 411 and the outermost observation mark 412 being circumferentially spaced apart.

[0118] Multiple observation markers 412 are identical, and the distance from the distance sensor 70 to the observation marker 412 is different from the distance from the distance sensor 70 to the circumference of the bearing 40. When the photovoltaic support 1 is not in a high wind protection state, when the rotating part 30 rotates, multiple observation markers 412 pass through the detection area of ​​the distance sensor 70 in sequence. The distance sensor 70 can detect the time difference between adjacent observation markers 412 passing through the detection area of ​​the distance sensor 70. When the time difference is the same, the rotating part 30 rotates normally. When the time difference is not large, the rotating part 30 twists slightly but does not affect the operation. When the time difference is large, the rotating part 30 twists more severely, and the rotating part 30 is controlled to stop rotating and a fault alarm is triggered.

[0119] Understandably, the bearing 40 is also provided with multiple observation marks 412 distributed circumferentially on its circumferential surface, which helps to detect the degree of torsion of the photovoltaic bracket 1 when it is not under wind protection.

[0120] This application also provides a control method for a photovoltaic support 1, such as... Figure 15 As shown, the photovoltaic support 1 includes: a detection device, a rotating part 30 and a limiting device 60. When the photovoltaic support 1 is in a strong wind protection state, the deflection value of the rotating part 30 is obtained.

[0121] When the deflection value of the rotating part 30 is determined to reach the first target value, the control limit device 60 moves to the second position and engages with the limiting position of the rotating part 30.

[0122] In this embodiment, the photovoltaic support 1 includes a column 10, a bearing seat 20, a detection device, a rotating part 30, and a limiting device 60. The bearing seat 20 is installed on the upper end of the column 10. The rotating part 30 includes a bearing 40 pivotally installed on the bearing seat 20 and a main shaft 50 installed on the bearing 40. The limiting device 60 is installed on the column 10 and moves between a first position and a second position. It is used to limit the engagement with the rotating part 30 in the second position. The detection device is installed on the bearing seat 20 and includes, but is not limited to, a distance sensor 70.

[0123] When the photovoltaic bracket 1 is in the wind protection state, the rotating part 30 does not rotate. That is, the main shaft 50 of the rotating part 30 forms a fixed angle with the horizontal plane in the wind protection state, while the limiting device 60 can be used at any angle. For example, when the main shaft 50 is placed horizontally or when the main shaft 50 forms a certain angle with the horizontal plane, the limiting device 60 can realize the limiting function.

[0124] Furthermore, when the main shaft 50 of the rotating part 30 is not rotating, due to the uneven wind load applied to the main shaft 50, different torques will be generated at different positions on the main shaft 50, causing the main shaft 50 to twist. At the same time, the main shaft 50 is in an oscillating state when it twists, that is, the direction of the main shaft 50 twists changes intermittently. For example, the main shaft 50 twists in a clockwise direction for a period of time, and in a counterclockwise direction for another period of time, and the two are alternately distributed.

[0125] When the spindle 50 is in an oscillating state, the spindle 50 repeatedly passes through the initial position or the position where the first deflection angle is located. The first deflection angle is the angle formed between the spindle 50 and the horizontal plane when the spindle 50 stops rotating. The first deflection angle is not limited to a fixed value and can take a value within a certain range. The limiting device 60 and the rotating part 30 cooperate to limit the spindle 50 when it is in the initial position or the position where the first deflection angle is located.

[0126] The control method of the photovoltaic bracket 1 includes: when the photovoltaic bracket 1 is in a strong wind protection state, obtaining the deflection value of the rotating part 30; when it is determined that the deflection value of the rotating part 30 reaches the first target value, controlling the limiting device 60 to move to the second position and cooperate with the limiting of the rotating part 30.

[0127] The bearing 40 of the rotating part 30 has multiple grooves 411 distributed circumferentially on the circumferential surface facing the distance sensor 70. The grooves 411 have different depths. The distance sensor 70 can obtain the deflection value of the rotating part 30 by measuring the distance from the distance sensor 70 to the bottom of the groove 411. For example, the distance sensor 70 can identify the groove 411 that is directly opposite the distance sensor 70 in the vertical direction through the measurement result. Grooves 411 of different depths correspond to different deflection angles, thereby determining the degree of deflection of the rotating part 30.

[0128] When the deflection value of the rotating part 30 reaches the first target value, the deflection angle of the rotating part 30 reaches the limit standard. At this time, the main shaft 50 is in an oscillating state. The control limit device 60 moves to the second position and cooperates with the rotating part 30 when the main shaft 50 is in the initial position or the position of the first deflection angle, fixing the rotating part 30 in the initial position or the position of the first deflection angle, so as to maintain the normal operation of the photovoltaic bracket 1 under the strong wind protection state.

[0129] In some embodiments, as shown in the figure, after the control limiting device 60 moves to the second position and engages with the rotating part 30 in a limiting manner, the method further includes:

[0130] After the first target duration, if the deflection value of the rotating part 30 is determined to be greater than the first target value but not greater than the second target value, a first-level instability alarm is output.

[0131] After the first target duration, if the deflection value of the rotating part 30 is determined to be greater than the second target value and less than the third target value, a second-level instability alarm is output;

[0132] After the first target duration, if the deflection value of the rotating part 30 is determined to be greater than or equal to the third target value, a level three instability alarm is output.

[0133] In this embodiment, after the control limiting device 60 moves to the second position and engages with the rotating part 30 in a limiting manner, the control method of the photovoltaic bracket 1 further includes: after a certain period of time, determining the range of the deflection value of the rotating part 30, thereby determining whether the rotating part 30 is unstable.

[0134] After the control limit device 60 moves to the second position and engages with the rotating part 30 for the first target duration, the deflection value of the rotating part 30 is determined. When the deflection value of the rotating part 30 is not greater than the first target value, the main shaft 50 does not twist or twists slightly, and no instability alarm is output. When the deflection value of the rotating part 30 is greater than the first target value but not greater than the second target value, a first-level instability alarm is output. When the deflection value of the rotating part 30 is greater than the second target value, less than the third target value, and changes regularly, a second-level instability alarm is output. When the deflection value of the rotating part 30 is greater than or equal to the third target value, the main shaft 50 is torn at a large angle and a third-level instability alarm is output.

[0135] When a Level 1 or Level 2 instability alarm occurs, the spindle undergoes a small-angle torsional deformation, requiring manual inspection to check for damage and clear the alarm. When a Level 3 instability alarm occurs, the spindle suffers a large-angle torsional failure, requiring manual intervention for repair.

[0136] In some embodiments, as shown in the figure, the photovoltaic support 1 also includes an observation mark 412, which is used to obtain the time difference between two adjacent observation marks 412 when the photovoltaic support 1 is in a non-wind protection state.

[0137] Once the time difference reaches the second target duration, control the photovoltaic support 1 to stop rotating and output a fault alarm.

[0138] In this embodiment, the circumferential surface of the bearing 40 is also provided with a plurality of observation marks 412 distributed circumferentially. The plurality of observation marks 412 are all identical, and the distance from the distance sensor 70 to the observation mark 412 is different from the distance from the distance sensor 70 to the circumferential surface of the bearing 40. When the photovoltaic support 1 is in a non-high wind protection state, when the rotating part 30 rotates, the plurality of observation marks 412 pass through the detection area of ​​the distance sensor 70 in sequence. The distance sensor 70 can detect the time difference of adjacent observation marks 412 passing through the detection area of ​​the distance sensor 70. When the time difference is the same, the rotating part 30 rotates normally. When the time difference is not large, the rotating part 30 twists slightly but does not affect the operation. When the time difference is large, the rotating part 30 twists more severely, and the rotating part 30 is controlled to stop rotating and a fault alarm is triggered.

[0139] When the photovoltaic support 1 is not in a high wind protection state, the detection device senses the time difference between two adjacent observation markers 412. When the time difference is less than the second target duration, the photovoltaic support 1 operates normally. When the time difference reaches the second target duration, the main shaft 50 twists severely, and the photovoltaic support 1 is controlled to stop rotating and a fault alarm is output.

[0140] This application also provides a control method for a photovoltaic support 1, such as... Figure 16 As shown, it includes:

[0141] First, determine whether photovoltaic bracket 1 is under wind protection.

[0142] When the photovoltaic support 1 is in the wind protection state, the torsion warning function is activated to control the distance sensor 70 to measure the actual distance to the bearing 40.

[0143] When the actual distance from the distance sensor 70 to the bearing 40 is not greater than the first target value, the photovoltaic bracket 1 is maintained in normal operation under the wind protection state;

[0144] When the actual distance from the distance sensor 70 to the bearing 40 is greater than the first target value, the limit device 60 is activated.

[0145] When the limit device 60 is activated, the photovoltaic bracket 1 will maintain normal operation under the wind protection state when the actual distance from the distance sensor 70 to the bearing 40 returns to no greater than the first target value.

[0146] When the limit device 60 is activated, if the actual distance from the distance sensor 70 to the bearing 40 is greater than the first target value and not greater than the second target value, a first-level instability alarm is triggered. The photovoltaic bracket 1 is manually checked for damage, and the alarm model is deactivated to maintain the normal operation of the photovoltaic bracket 1 under the high wind protection state.

[0147] When the limit device 60 is activated, if the actual distance from the distance sensor 70 to the bearing 40 is greater than the second target value and less than the third target value and maintains a regular change, a level two instability alarm is triggered. The photovoltaic bracket 1 is manually checked for damage, and the alarm model is deactivated to maintain the normal operation of the photovoltaic bracket 1 under the high wind protection state.

[0148] When the limit device 60 is activated, if the actual distance from the distance sensor 70 to the bearing 40 is greater than or equal to the third target value, the wind protection of the photovoltaic bracket 1 fails, the main shaft 50 is torn at a large angle and damaged, triggering a level three instability alarm, requiring manual intervention for maintenance.

[0149] When the photovoltaic support 1 is not in a high wind protection state, the operation status monitoring function is activated to obtain the time difference between two adjacent observation markers 412 sensed by the detection device. When the time difference is less than the second target duration, the photovoltaic support 1 is operating normally. When the time difference reaches the second target duration, an operation fault warning is issued, the photovoltaic support 1 is controlled to stop rotating, and a manual inspection is performed to clear the alarm and restore operation.

[0150] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0151] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0152] In the description of this application, "first feature" and "second feature" may include one or more of the features.

[0153] In the description of this application, "multiple" means two or more.

[0154] In the description of this application, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or the first and second features being in contact through another feature between them.

[0155] In the description of this application, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0156] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0157] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A photovoltaic support (1), characterized in that, include: Column (10); Bearing housing (20) is installed on the upper end of the column; The rotating part (30) includes a bearing (40) pivotally mounted on the bearing housing (20) and a spindle (50) mounted on the bearing (40); A limiting device (60) is installed on the column (10). The limiting device (60) moves between a first position and a second position and is used to limit the engagement with the rotating part (30) in the second position.

2. The photovoltaic bracket (1) according to claim 1, characterized in that, The limiting device (60) is used to limit the engagement with the bearing (40) in the second position.

3. The photovoltaic bracket (1) according to claim 2, characterized in that, The bearing (40) includes a limiting groove (430), and the limiting device (60) includes a limiting member (610). The limiting member (610) rotates relative to the column (10) between the first position and the second position, and the limiting member (610) is inserted into the limiting groove (430) at the second position.

4. The photovoltaic bracket (1) according to claim 1, characterized in that, The limiting device (60) is used to limit the engagement with the spindle (50) in the second position.

5. The photovoltaic bracket (1) according to claim 4, characterized in that, The limiting device (60) includes a limiting member (610), which rotates relative to the column (10) between the first position and the second position, and the limiting member (610) clamps the main shaft (50) in the second position; or; The rotating part (30) further includes a sleeve (510) mounted on the main shaft (50), the sleeve (510) having a locking hole (511), the limiting device (60) including a pin (613) for moving between a first position and a second position, and the pin (613) being inserted into the locking hole (511) in the second position.

6. The photovoltaic bracket (1) according to claim 1, characterized in that, When the rotating part (30) is in the initial position or the first deflection angle and the limiting device (60) is in the second position, the limiting device (60) and the rotating part (30) are in a limiting engagement.

7. The photovoltaic bracket (1) according to claim 1, characterized in that, The limiting device (60) includes: The limit drive mechanism (620) and the limit member (610) are configured to drive the limit member (610) to move between the first position and the second position, and the limit member (610) engages with the rotating part (30) in the second position.

8. The photovoltaic bracket (1) according to any one of claims 1-7, characterized in that, The photovoltaic support (1) also includes: A distance sensor (70) is installed on the bearing housing (20). The bearing housing (20) has a clearance hole (210) facing the distance sensor (70). The bearing (40) has a plurality of grooves (411) distributed circumferentially on its circumferential surface facing the distance sensor (70). The depths of the plurality of grooves (411) are different. The distance sensor (70) is used to measure the distance to the bottom of the groove (411).

9. The photovoltaic bracket (1) according to claim 8, characterized in that, Including at least one of the following implementation methods: Method 1: The plurality of grooves (411) are symmetrically distributed with respect to the middle one, and the depth from the middle groove (411) to each groove (411) around any direction is stepped; Method 2: The plurality of grooves (411) are connected as one piece, and the grooves (411) are spaced apart from the two ends of the bearing (40); Method 3: The bearing (40) is also provided with multiple observation marks (412) distributed along the circumferential direction on its circumferential surface.

10. A control method for a photovoltaic support structure, characterized in that, The photovoltaic support includes a detection device, a rotating part, and a limiting device. When the photovoltaic support is in a high wind protection state, the deflection value of the rotating part is obtained. When it is determined that the deflection value of the rotating part reaches the first target value, the limiting device is controlled to move to the second position and cooperate with the limiting of the rotating part.

11. The control method for a photovoltaic support according to claim 10, characterized in that, After the limiting device is moved to the second position and engaged with the rotating part for limiting, the method further includes: After the first target duration, if it is determined that the deflection value of the rotating part is greater than the first target value but not greater than the second target value, a first-level instability alarm is output; and / or; After the first target duration, if it is determined that the deflection value of the rotating part is greater than the second target value and less than the third target value, a second-level instability alarm is output; and / or; After the first target duration, if the deflection value of the rotating part is determined to be greater than or equal to the third target value, a level three instability alarm is output.

12. The control method for a photovoltaic support according to claim 10, characterized in that, The photovoltaic support also includes observation markers. When the photovoltaic support is not in a strong wind protection state, the time difference between the detection device sensing two adjacent observation markers is obtained. If the time difference reaches the second target duration, the photovoltaic support is controlled to stop rotating and a fault alarm is output.

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