A multi-point stopping photovoltaic tracking system

Abstract

A multi-point stopping photovoltaic tracking system, comprising a main beam, a first driving device and a column group. The column group is provided with a plurality of columns spaced along the length direction of the main beam. The main beam is rotatably penetrated through the column group. The first driving device is installed on one of the columns and is connected to drive the main beam to rotate. It is characterized in that: it further comprises a second driving device and a plurality of stopping devices. The plurality of stopping devices are respectively installed between different columns and the main beam to lock the main beam to achieve multi-point stopping. The second driving device is installed on one of the columns and is connected to drive each stopping device to act synchronously to unlock the main beam. The present invention can achieve multi-point stopping without increasing the driving points, and improves the wind resistance stability of the system.

Description

Technical Field

[0001] The invention relates to the field of photovoltaic technology, in particular to a multi-point stopping photovoltaic tracking system. Background Art

[0002] At present, when the flat single-axis photovoltaic tracking bracket is tracking the sun normally, the driving device is required to drive the photovoltaic module to rotate from east to west with the north-south axis as the axis to obtain higher sunlight irradiation and increase power generation. When encountering severe windy weather, the driving device is required to drive the photovoltaic module to stay at a certain angle to resist the wind and no longer track the sun normally. This can better resist the force and torque generated by the wind load on the photovoltaic module, effectively improving the wind resistance performance of the bracket.

[0003] Common tracking brackets have single-point or multi-point drive devices. The drive devices generally have a self-locking function that can limit the rotation of the main beam. In the case of a single-point drive device, the torque on the main shaft will be concentrated at one point during strong winds, resulting in excessive load on the drive device. The multi-point drive device has multiple points to limit the rotation of the main shaft, so the wind torque on the main shaft is dispersed, which significantly reduces the wind torsion on the main beam. At the same time, it increases the rigidity of the tracking bracket in the direction of rotation and improves the stability of the bracket. The more fixed points there are on the main beam, the more dispersed the torque is, and the stronger the overall rigidity of the bracket.

[0004] Therefore, the main reason why tracking brackets on the market use multi-point drive is not to provide more driving force with more driving points, because even a single point can provide enough driving force to operate the bracket. Instead, it is to use the self-locking force (holding force or torque) of multiple driving devices to resist wind-induced torque under strong wind conditions, so that more points on the main beam of the bracket are fixed to limit the freedom of rotation and reduce the concentration of torque, thereby reducing the torsional performance of the main beam section, ultimately reducing the material cost of the main beam, and improving the wind resistance of the bracket.

[0005] However, in order to have more fixing points on the main beam of the support under strong winds, the existing tracking support technical solutions use more driving devices to increase the number of fixing points. Common driving devices are rotary reducers or linear push rods, which are often expensive. In addition, since the time that the tracking support encounters strong wind conditions during its entire life cycle is far less than the time of normal operation, in most cases, the support does not need more driving devices to complete the normal tracking operation function of the support. The strong wind mode of the support will only be triggered in a few times or a few times. From an economic and practical perspective, since the driving device is expensive, the number of driving points is not necessarily more. Excessive driving points will lead to over-design, which will increase the cost of the support and bring greater challenges to installation and operation and maintenance. Summary of the invention

[0006] The main object of the present invention is to overcome the defects in the prior art that achieving multi-point stopping by increasing driving points has high costs and is inconvenient for installation, operation and maintenance. A photovoltaic tracking system with multi-point stopping is proposed. The multi-point stopping is realized by using a stopping device, which reduces costs, improves the wind resistance stability of the bracket and is convenient for installation, operation and maintenance.

[0007] The present invention adopts the following technical solutions:

[0008] A photovoltaic tracking system with multi-point stopping, comprising a main beam, a first driving device and a column group. The column group is provided with a plurality of columns spaced along the length direction of the main beam. The main beam is rotatably passed through the column group. The first driving device is installed on one of the columns and is connected to drive the main beam to rotate; it is characterized in that: it further includes a second driving device and a plurality of stopping devices. The plurality of stopping devices are respectively installed between different columns and the main beam to lock the main beam to achieve multi-point stopping. The second driving device is installed on one of the columns and is connected to drive each stopping device to act synchronously to unlock the main beam, and is set as:

[0009] When the wind speed is less than the preset threshold V, the photovoltaic tracking system with multi-point stopping is controlled to be in the normal tracking mode. Then the second driving device drives each stopping device to act synchronously to unlock the main beam, and the first driving device drives the main beam to rotate following the sun.

[0010] When the wind speed is greater than or equal to the preset threshold V, the photovoltaic tracking system with multi-point stopping is controlled to be in the wind resistance mode. Then the first driving device drives the main beam to rotate to a set wind resistance angle and then stops. The second driving device acts to make each stopping device return to its position to lock the main beam to achieve multi-point stopping.

[0011] Preferably, the stopping device includes a mounting seat, a stopping disk and a lifting component; the mounting seat is fixed on the column and is rotatably connected to the main beam; the stopping disk is fixedly connected to the main beam and can rotate with the main beam. The stopping disk is provided with a limiting groove; the lifting component is arranged on the mounting seat in a liftable manner and is provided with a stopping piece to engage with or disengage from the limiting groove to lock or unlock the main beam; the second driving device is connected to the lifting component.

[0012] Preferably, the stopping disk includes a hoop portion and at least one stopping plate. The hoop portion is provided with a first mounting hole to be fixedly connected to the main beam. The stopping plate is fixed to the hoop portion and its outer periphery is provided with the limiting groove. One end of the limiting groove opposite to the stopping piece is provided with an opening.

[0013] Preferably, the stopping disk is further provided with two limiting protrusions. The two limiting protrusions are circumferentially distributed along the stopping disk and are located on both sides of the limiting groove. The stopping disk is limited by the limiting protrusions against the stopping piece.

[0014] Preferably, an installation groove is provided on the mounting seat, and the installation groove is located below the stop disc; the lifting assembly includes a first elastic member and a lifting rod, the lifting rod is slidably disposed through the installation groove, and a stop member is provided at the top end thereof, and the first elastic member is abutted between the lifting rod and the installation groove to drive the stop member to be engaged with the limiting member.

[0015] Preferably, two vertical plates are provided on the mounting seat, the two vertical plates are arranged in parallel at intervals and are provided with guide holes, and the guide holes extend along the lifting direction of the stop member; both ends of the stop member are slidably disposed through the corresponding guide holes; the outer periphery of the stop disc can be located between the two vertical plates.

[0016] Preferably, several columns of the column group are divided into at least one driving column, one main stop column, two side stop columns and at least one middle stop column; the two side stop columns are located on both sides of the column group, the main stop column is located in the middle of the column group, and the middle stop column and the driving column are located between the side stop column and the main stop column; the first driving device is installed on the driving column; the second driving device is installed on the main stop column; several stop devices are respectively installed on the main stop column, the side stop column and the middle stop column.

[0017] Preferably, the second driving device includes a second electric push rod, two main pull ropes and several auxiliary pull ropes, the second electric push rod is installed on the mounting seat and is provided with a push rod; one end of the two main pull ropes is connected to the push rod, and the other end passes through the middle stop column, the driving column and the corresponding side stop column in opposite directions and is connected to the mounting seat of the stop device on the side stop column through a second elastic member respectively; one end of the several auxiliary pull ropes is fixedly connected to the main pull rope, and the other end is connected to the lifting assembly of the corresponding stop device.

[0018] Preferably, pulley groups are provided on both sides of the main stop column, the side stop column and the middle stop column for the main pull rope to pass through, and the main pull rope and the auxiliary pull rope bypass the pulley group.

[0019] Preferably, the first driving device includes a first electric push rod and a push rod arm, the push rod arm is connected to the main beam, and the first electric push rod is connected between the push rod arm and the column to drive the push rod arm to act to drive the main beam to rotate.

[0020] As can be seen from the above description of the present invention, compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. In the present invention, a second driving device and a plurality of stopping devices are provided. The plurality of stopping devices are respectively installed between different columns and the main beam to lock the main beam to achieve multi-point stopping. The second driving device is installed on one of the columns and is connected to drive each stopping device to act synchronously to unlock the main beam, so that multi-point stopping can be achieved without increasing the driving points, improving the wind resistance stability of the system.

[0022] 2. In the present invention, the stopping device includes a mounting seat, a stopping disk and a lifting assembly; the mounting seat is fixed on the column and is rotatably connected to the main beam, the stopping disk is fixedly connected to the main beam and can rotate with the main beam, and a limiting groove is provided on the stopping disk; the lifting assembly is disposed on the mounting seat in a liftable manner and is provided with a stopping member, and the main beam is locked or unlocked by driving the stopping member to lift and engage or disengage from the limiting groove, thereby improving the wind resistance stability.

[0023] 3. In the present invention, the stopping disk includes a hoop portion and a stopping plate. The hoop portion is provided with a first mounting hole for fixedly connecting with the main beam. The outer periphery of the stopping plate is provided with a limiting groove, and the limiting groove is provided with an opening for the stopping member to engage or disengage. The main beam can be locked or unlocked by locking or unlocking the stopping plate; in addition, the stopping disk is further provided with two limiting protrusions, and the main beam is limited by the limiting protrusions against the stopping member to further limit the rotation angle of the main beam and prevent the main beam from rotating excessively.

[0024] 4. In the present invention, the lifting assembly includes a first elastic member and a lifting rod. The lifting rod is disposed in the mounting groove in a liftable manner and its top end is provided with a stopping member. The first elastic member abuts between the lifting rod and the mounting groove to drive the stopping member to engage with the limiting member. The structure is simple and the installation is convenient; in addition, two vertical plates can be provided on the mounting seat, and guiding holes are provided on the vertical plates. Both ends of the stopping member can slidably pass through the corresponding guiding holes, so as to ensure that the lifting action of the lifting rod is more stable and reliable.

[0025] 5. In the present invention, a plurality of columns are divided into a driving column, a main stopping column, a side stopping column and a middle stopping column. The first driving device is installed on the driving column, and the second driving device is installed on the main stopping column; a plurality of stopping devices are respectively installed on the main stopping column, the side stopping column and the middle stopping column, etc. Adopting this structure can make the torque of the main beam more dispersed and the force on each column more uniform, reduce the force on the main beam and the column, and the cross section thereof can be appropriately reduced, reducing the cost of the system support.

[0026] 6. In the present invention, the second driving device may adopt a second electric push rod, two main pulling ropes and several auxiliary pulling ropes. One end of the two main pulling ropes is connected to the push rod, and the other end passes through the stop column, the driving column and the corresponding side stop column in opposite directions and is respectively connected to the mounting seat of the stop device on the side stop column through the second elastic member. One end of several auxiliary pulling ropes is fixedly connected to the main pulling rope, and the other end is connected to the lifting assembly of the corresponding stop device. The second driving device can drive multiple stop devices simultaneously, which is convenient for operation.

[0027] 7. In the present invention, driving the main beam to rotate with fewer driving points can meet the power demand and rotation accuracy requirements of the system. Using more stop devices than the number of driving points to achieve multi-point stopping greatly improves the overall rigidity of the system, and the requirement for the self-locking holding force of the first driving device is small after the torque of the main beam is dispersed, so the specification of the driving device can be appropriately reduced to reduce costs.

[0028] 8. In the present invention, when the wind speed is less than the preset threshold V, the photovoltaic tracking system with multi-point stopping is controlled to be in the normal tracking mode. Then the second driving device drives each stop device to act synchronously to unlock the main beam, and the first driving device drives the main beam to rotate to track the sun. When the wind speed is greater than or equal to the preset threshold V, the photovoltaic tracking system with multi-point stopping is controlled to be in the wind resistance mode. Then the first driving device drives the main beam to rotate to the set wind resistance angle and stops, and the second driving device acts to make each stop device return to its position to lock the main beam to achieve multi-point stopping. The control method is simple and reliable. Description of the Drawings

[0029] Figure 1 is a schematic diagram of the system of the present invention;

[0030] Figure 2 is the front view of the driving column;

[0031] Figure 3 is the perspective view of the driving column;

[0032] Figure 4 is the front view of the main stop column;

[0033] Figure 5 is the perspective view (front) of the main stop column;

[0034] Figure 6 is the perspective view (back) of the main stop column;

[0035] Figure 7 is the side view of the stop column;

[0036] Figure 8 is the front view of the stop column;

[0037] Figure 9 is the side view of the side stop column;

[0038] Figure 10 is the front view of the side stop column;

[0039] Figure 11 is the pulley set installed on the column;

[0040] Figure 12 is the structure diagram of the stop device installed on the column;

[0041] Figure 13 is the three-dimensional view of the stop disc;

[0042] Figure 14 is the structure diagram of the lifting assembly;

[0043] Figure 15 is the structure diagram of the mounting seat (front);

[0044] Figure 16 is the structure diagram of the mounting seat (back);

[0045] Figure 17 is the state diagram of the stop device locking the main beam;

[0046] Figure 18 is the state diagram of the stop device unlocking the main beam;

[0047] Figure 19 is the state diagram of the limit protrusion abutting against the stop member;

[0048] Wherein:

[0049] 10. Column group, 11. First driving device, 12. First electric push rod, 13. Push rod arm, 14. Driving column, 15. Push rod seat, 16. Main stop column, 17. Side stop column, 18. Middle stop column, 20. Main beam, 21. Purlin, 30. Mounting seat, 31. Bottom plate, 32. Support plate, 33. Sleeve body, 34. Second mounting hole, 35. Mounting groove, 36. Vertical plate, 37. Guide hole, 40. Stop disc, 41. Limit groove, 42. Hoop part, 43. Stop plate, 43a. Arc part, 44. First mounting hole, 45. Opening, 46. Limit protrusion, 50. Lifting assembly, 51. Stop member, 52. First elastic member, 53. Lifting rod, 54. Convex ring, 60. Second driving device, 61a. Main pulling rope, 61b. Auxiliary pulling rope, 62. Second electric push rod, 63. Push rod, 64. Rope buckle, 65. Pulley, 66. Pulley seat, 67. Second elastic member, 70. Control device.

[0050] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Specific Embodiments

[0051] The present invention will be further described below through specific embodiments.

[0052] In the present invention, for terms such as "first", "second", "third", etc., they are only used to distinguish similar objects, and do not necessarily need to be used to describe a specific order or sequence, nor can they be understood as indicating or implying relative importance. In the description, the orientation or positional relationship indicated by "up", "down", "left", "right", "front" and "back" is based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the present invention, rather than indicating or implying that the device referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the protection scope of the present invention. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0053] In addition, in the description of this application, unless otherwise specified, "a plurality of" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects before and after.

[0054] See Figures 1 to 19 , a photovoltaic tracking system with multi-point stopping, including a main beam 20, a first driving device 11, a column group 10, a second driving device 60 and several stopping devices, etc. The main beam 20 can be horizontally placed, and several purlins 21 can be connected thereto to install photovoltaic modules, that is, the photovoltaic panel modules are supported by the purlins 21. The column group 10 is provided with several columns spaced along the length direction of the main beam 20, and the main beam 20 is rotatably passed through each column of the column group 10 around its axis. The first driving device 11 is installed on one of the columns and is connected to drive the main beam 20 to rotate; the several stopping devices are respectively installed between different columns and the main beam 20 to lock the main beam 20 to achieve multi-point stopping. The second driving device 60 is installed on one of the columns and is connected to drive each stopping device to act synchronously to unlock the main beam 20. And, it is also set that:

[0055] When the wind speed is less than the preset threshold V, the photovoltaic tracking system with multi-point stopping is controlled to be in the normal tracking mode. Then, the second driving device 60 drives each stopping device to act synchronously to unlock the main beam 20, and the first driving device 11 drives the main beam 20 to rotate following the sun, thereby increasing the power generation of the system.

[0056] When the wind speed is greater than or equal to the preset threshold V, the photovoltaic tracking system with multi-point stopping is controlled to be in the wind resistance mode. After the first driving device 11 drives the main beam 20 to rotate to the set wind resistance angle, the second driving device 60 acts to make each stopping device return to its position to lock the main beam 20 to achieve multi-point stopping.

[0057] Among them, the stopping device includes a mounting base 30, a stopping disk 40, a lifting assembly 50, etc. The mounting base 30 is used to connect the columns of the column group 10 and the main beam 20, and is fixed on the column and rotatably connected to the main beam 20. Specifically, the mounting base 30 includes a bottom plate 31, a support plate 32 and a sleeve 33. The bottom plate 31 can be fixed to the top of the column by bolts or screws. The support plate 32 is located on the top surface of the bottom plate 31 and is connected between the bottom plate 31 and the sleeve 33. The sleeve 33 is provided with a second mounting hole 34, and a bearing is provided in the second mounting hole 34 for rotatable connection with the main beam 20. The second mounting hole 34 can be a through-round hole, and its size can be set according to the size of the main beam 20.

[0058] The stopping disk 40 is fixedly connected to the main beam 20. When the main beam 20 is driven to rotate around its own axis, the stopping disk 40 can rotate with the main beam 20. The stopping disk 40 is provided with a limiting groove 41. The lifting assembly 50 is disposed on the mounting base 30 in a liftable manner and is provided with a stopping member 51. By driving the stopping member 51 to lift and engage or disengage from the limiting groove 41, the locking or unlocking of the stopping disk 40, that is, the locking or unlocking of the main beam 20, is realized. When the stopping disk 40 is locked, the main beam 20 and the stopping disk 40 cannot rotate. When the stopping disk 40 is unlocked, the main beam 20 and the stopping disk 40 can rotate.

[0059] Among them, the stopping disk 40 includes a hoop portion 42 and at least one stopping plate 43. The hoop portion 42 is provided with a first mounting hole 44. The main beam 20 can pass through the first mounting hole 44. A number of bolts or screws are also provided on the hoop portion 42. The shape and size of the first mounting hole 44 can be adapted to the main beam 20. By adjusting the bolts or screws, the hoop portion 42 can tightly hold the main beam 20.

[0060] The stopping plate 43 is fixed to the hoop portion 42. A limiting groove 41 is provided on the outer periphery of the stopping plate 43. The stopping plate 43 can be two or one. Taking two as an example, the two stopping plates 43 are arranged in parallel at intervals and are connected through a connecting portion. An arc portion 43a is provided on the outer periphery of each stopping plate 43, so that the stopping plate 43 is similar to a sector. A limiting groove 41 can be provided in the middle of the arc portion 43a. An opening 45 is provided at one end of the limiting groove 41 facing the stopping member 51 to facilitate the engagement or disengagement of the stopping member 51.

[0061] Further, the stop disc 40 is further provided with two limiting protrusions 46 which are circumferentially distributed along the stop disc 40 and are located on both sides of the limiting groove 41. The stop disc 40 is limited by abutting the limiting protrusions 46 against the stop member 51. Specifically, each stop plate 43 is provided with two limiting protrusions 46 which are respectively located at both ends of the arc portion 43a and extend radially outward. When the main beam 20 rotates forward to a preset angle, when one of the limiting protrusions 46 abuts against the stop member 51, the main beam 20 stops rotating. When the main beam 20 rotates backward to a preset angle, when the other limiting protrusion 46 abuts against the stop member 51, the main beam 20 stops rotating. Refer to Figure 19 .

[0062] The mounting base 30 is provided with a mounting groove 35 which is located below the stop disc 40 and is used for mounting the lifting assembly 50. The lifting assembly 50 includes a first elastic member 52 and a lifting rod 53. The lifting rod 53 is vertically movably inserted into the mounting groove 35 and a stop member 51 is provided at the top end thereof. The stop member 51 can be perpendicular to the lifting rod 53. A convex ring 54 can also be provided near the middle of the lifting rod 53. The first elastic member 52 abuts between the convex ring 54 of the lifting rod 53 and the mounting groove 35. The first elastic member 52 is provided to drive the lifting rod 53 to rise until the stop member 51 is caught in the limiting groove 41.

[0063] Further, the mounting base 30 is provided with two vertical plates 36 which are arranged in parallel at intervals and are provided with guide holes 37. The guide holes 37 extend along the lifting direction of the stop member 51. Both ends of the stop member 51 are slidably inserted into the corresponding guide holes 37. The guide holes 37 play a guiding role, that is, when the lifting rod 53 moves up and down, the stop member 51 can slide along the guide holes 37. In addition, the outer circumference of the stop disc 40 can be located between the two vertical plates 36 to ensure that the stop member 51 can accurately be caught in the limiting groove 41 when locked. In practical applications, the vertical plates 36 can be located at the top of the bottom plate 31, and the mounting groove 35 can be located at the bottom surface of the bottom plate 31.

[0064] In the present invention, several columns of the column group 10 can be divided into at least one driving column 14, one main stop column 16, two side stop columns 17 and at least one middle stop column 18. The two side stop columns 17 are located on both sides of the column group 10. The main stop column 16 is located in the middle position or near the middle position of the column group 10. The middle stop column 18 and the driving column 14 are located between the side stop columns 17 and the main stop column 16. Stop devices can be installed on the main stop column 16, the side stop columns 17 and the middle stop column 18. The driving column 14 may not be installed with a stop device. At least one middle stop column 18 or a main stop column 16 etc. can be provided between the two driving columns 14. The number of the driving columns 14, the number of the middle stop columns 18, the arrangement order etc. can be set according to power requirements, rotation accuracy requirements etc., and are not limited thereto.

[0065] Further, the first driving device 11 can be installed on the driving column 14, and the number of the first driving devices 11 can correspond to the number of the driving columns 14. The first driving device 11 includes a first electric push rod 12 and a push rod arm 13. The push rod arm 13 is connected to the main beam 20. The first electric push rod 12 is connected between the push rod arm 13 and the driving column 14, and can drive the push rod arm 13 to act to drive the main beam 20 to rotate. A push rod seat 15 is further provided on the driving column 14. Two ends of the first electric push rod 12 are respectively rotatably connected to the push rod arm 13 and the push rod seat 15. By the telescopic movement of the push rod of the first electric push rod 12, the push rod arm 13 is driven to drive the main beam 20 to rotate forward or backward.

[0066] Further, the second driving device 60 can be installed on the main stop column 16. It can include a second electric push rod 62, two main pull ropes 61a and a plurality of auxiliary pull ropes 61b. The second electric push rod 62 is installed on the mounting seat 30 and is provided with a push rod. One ends of the two main pull ropes 61a are connected to the push rod, and the other ends pass through the stop column 18, the driving column 14 and the corresponding side stop column 17 in opposite directions and are connected to the mounting seat 30 of the stop device on the side stop column 17 through a second elastic member 67, that is, the second elastic member 67 is connected between the other end of the main pull rope 61a and the mounting seat 30 so that the main pull rope 61a is always in a taut state. One ends of the plurality of auxiliary pull ropes 61b are fixedly connected to the main pull rope 61a, and the other ends are connected to the lifting rods 53 of the corresponding stop devices, that is, the number and positions of the auxiliary pull ropes 61b correspond to the number and positions of the stop devices. The first elastic member 52 of the lifting assembly can ensure that the auxiliary pull ropes 61b are always in a taut state. The first electric push rod 62 and the second electric push rod 62 in the present invention convert the rotational motion of the motor into the linear motion of the push rod. In practical applications, a power structure with a similar function can also be used for replacement.

[0067] In the present invention, the main pull rope 61a and the auxiliary pull ropes 61b can be made of steel wire ropes. A rope buckle 64 can be used to connect between the push rod 63 and the main pull rope 61a, between the auxiliary pull ropes 61b and the lifting rods 53, and between the main pull rope 61a and the auxiliary pull ropes 61b. Among them, through holes for the main pull rope 61a to pass through are provided on the main stop column 16, the side stop column 17 and the stop column 18. Pulley groups are respectively provided on both sides of the holes. The main pull rope 61a and the auxiliary pull ropes 61b can bypass the pulley groups. By the pulley groups, the direction of the force of the push rod of the second electric push rod 62 can be changed to ensure the smooth pulling of the lifting rods 53. The pulley group can include a fixed pulley 65 and a pulley seat 66. The pulley seat 66 is fixed to the column, and the fixed pulley 65 is rotatably connected to the pulley seat 66.

[0068] In practical applications, the present invention is also provided with a control device 70, which can be connected to the first driving device 11 and the second driving device 60, and control the actions of the first driving device 11 and the second driving device 60 according to the operating conditions required, so that the system can switch between different operating conditions. The operating conditions may include a normal tracking mode, a wind resistance mode, etc. The working principle is as follows:

[0069] Normal tracking mode: The second driving device 60 on the main stop column 16 operates, and the push rod 63 of the second electric push rod 62 retracts, that is, it simultaneously pulls up the two main pull ropes 61a. The two main pull ropes 61a pull the auxiliary pull ropes 61b connected thereto, and the auxiliary pull ropes 61b pull down the lifting rod 53 connected thereto. Then, the first elastic members 52 of the stop devices on the main stop column 16, the middle stop column 18, and the side stop column 17 are all compressed, and the second elastic member 67 on the side stop column 17 is stretched. The stop members 51 of all the stop devices disengage from the limit slots 41, so that the stop devices do not restrict the rotation freedom of the main beam 20; at the same time, the control device 70 controls the first driving device 11 on the driving column 14 to operate, and the first driving device 11 drives the main beam 20 to drive the photovoltaic module to rotate to obtain higher solar irradiance. At the same time, the stop disk 40 of the stop device rotates with the main beam 20. See Figure 18 .

[0070] Wind resistance mode: The control device 70 controls the first driving device 11 on the driving column 14 to operate, and the first driving device 11 drives the main beam 20 to rotate until the limit slot 41 is opposite to the stop member 51. The control device 70 controls the second driving device 60 to operate, and the push rod of the second electric push rod 62 extends. Then, the second elastic member 67 returns to its original position and tightens the main pull rope 61a. The first elastic members 52 of each stop device reset and drive the lifting rod 53 to rise. The rising of the lifting rod 53 can tighten the auxiliary pull rope 61b, and the stop member 51 just fits into the limit slot 41, and the main beam 20 is locked. See Figure 17 , at this time, the stop disks 40 of each stop device are in a stopped state, and the main beam 20 is in a state of restricting the rotation of the main beam 20 at each column, thereby realizing stopping at more points than the number of the first driving devices 11, and even all the main beams 20 of all the columns can be in a stopped state, greatly improving the overall rigidity of the bracket.

[0071] The above is only the specific implementation manner of the present invention, but the design concept of the present invention is not limited thereto. Any non-substantive modification made to the present invention using this concept shall fall within the scope of infringement of the protection scope of the present invention.

Claims

1. A multi-point stopping photovoltaic tracking system, comprising a main beam, a first driving device and a column group. The column group is provided with a plurality of columns spaced along the length direction of the main beam. The main beam is rotatably penetrated through the column group. The first driving device is installed on one of the columns and is connected to drive the main beam to rotate; characterized in that: It further includes a second driving device and a plurality of stopping devices. The plurality of stopping devices are respectively installed between different columns and the main beam to lock the main beam to achieve multi-point stopping. The stopping device includes a mounting seat, a stopping disk and a lifting assembly; the mounting seat is fixed on the column and is rotatably connected to the main beam; the stopping disk is fixedly connected to the main beam and can rotate with the main beam, and a limiting groove is provided on the stopping disk; the lifting assembly is arranged on the mounting seat in a liftable manner and is provided with a stopping member to engage with or disengage from the limiting groove to lock or unlock the main beam; the second driving device is connected to the lifting assembly; the second driving device is installed on one of the columns and is configured to connect and drive each stopping device to act synchronously to unlock the main beam, and is arranged as follows: When the wind speed is less than the preset threshold value V, the photovoltaic tracking system with multi-point stopping is controlled to be in the normal tracking mode. Then, the second driving device drives each stopping device to act synchronously to unlock the main beam, and the first driving device drives the main beam to rotate to track the sun; When the wind speed is greater than or equal to the preset threshold value V, the photovoltaic tracking system with multi-point stopping is controlled to be in the wind resistance mode. Then, the first driving device drives the main beam to rotate to the set wind resistance angle and then stops, and the second driving device acts to make each stopping device return to its position to lock the main beam to achieve multi-point stopping; An installation groove is provided on the mounting seat, and the installation groove is located below the stopping disk; the lifting assembly includes a first elastic member and a lifting rod. The lifting rod is arranged in the installation groove in a liftable manner, and the stopping member is provided at the top end thereof. The first elastic member abuts between the lifting rod and the installation groove to drive the stopping member to engage with the limiting groove; Two vertical plates are provided on the mounting seat. The two vertical plates are arranged in parallel at intervals and are provided with guiding holes. The guiding holes extend along the lifting direction of the stopping member; both ends of the stopping member are slidably arranged through the corresponding guiding holes; the outer periphery of the stopping disk can be located between the two vertical plates; The several columns of the column group are divided into at least one driving column, one main stopping column, two side stopping columns and at least one middle stopping column; the two side stopping columns are located on both sides of the column group, the main stopping column is located in the middle of the column group, and the middle stopping column and the driving column are located between the side stopping columns and the main stopping column; the first driving device is installed on the driving column; the second driving device is installed on the main stopping column; several of the stopping devices are respectively installed on the main stopping column, the side stopping columns and the middle stopping column; The second driving device includes a second electric push rod, two main pull ropes and several auxiliary pull ropes. The second electric push rod is installed on the mounting seat and is provided with a push rod; one end of each of the two main pull ropes is connected to the push rod, and the other ends pass through the middle stopping column, the driving column and the corresponding side stopping column in opposite directions and are respectively connected to the mounting seats of the stopping devices on the side stopping columns through second elastic members; one end of each of the several auxiliary pull ropes is fixedly connected to the main pull rope, and the other end is connected to the lifting assembly of the corresponding stopping device; Pulley groups are provided on both sides of the main stopping column, the side stopping columns and the middle stopping column for the main pull ropes to pass through, and the main pull ropes and the auxiliary pull ropes bypass the pulley groups; The first driving device includes a first electric push rod and a push rod arm. The push rod arm is connected to the main beam, and the first electric push rod is connected between the push rod arm and the column to drive the push rod arm to act and drive the main beam to rotate.

2. The multi-point stop photovoltaic tracking system according to claim 1, characterized in that: The stop disk includes a hoop portion and at least one stop plate. The hoop portion is provided with a first mounting hole for fixedly connecting with the main beam. The stop plate is fixed to the hoop portion, and a limiting groove is provided on its outer periphery. An opening is provided at one end of the limiting groove relative to the stop member.

3. A photovoltaic tracking system with multi-point stopping as claimed in claim 1, characterized in that: The stop disk is further provided with two limiting protrusions. The two limiting protrusions are circumferentially distributed along the stop disk and are located on both sides of the limiting groove. The stop disk is limited by the limiting protrusions abutting against the stop member.

Images