WO2017197966A1

WO2017197966A1 - Flexible driving device for all-terrain-matching linkage tracking photovoltaic support

Info

Publication number: WO2017197966A1
Application number: PCT/CN2017/076410
Authority: WO
Inventors: 程继高
Original assignee: 马鞍山经纬回转支承有限公司
Priority date: 2016-05-19
Filing date: 2017-03-13
Publication date: 2017-11-23
Also published as: CN105811869B; CN105811869A

Abstract

Provided in the present invention is a flexible driving device for an all-terrain-matching linkage tracking photovoltaic support, comprising: a reducer sprocket, columns for supporting and rotating solar panels, and main beams that are movable on the columns. The main beams are provided thereon with purlins for transferring power to respective arrays of solar panels, the rear end of a preceding purlin being connected, by means of a synchronous cable guided by a pulley A, to the front end of a following purlin, realizing a head-to-tail serial connection of the purlins. The reducer sprocket drives a transmission chain in a reciprocating motion, two traction cables being respectively connected to the two ends of the transmission chain, and the other end of the two traction cables being connected to synchronous cables via two pulleys B. The two pulleys B each are fitted with a counterweight to maintain an automatically compensated tensile force of the transmission chain and the traction cables. The present invention is structurally simple and easy to install, solving the problem that a linkage horizontal single-axis, linkage inclined single-axis, or linkage array-type double-axis tracking support has to meet a high standard concerning the flatness of the land and cannot be installed and used on a barren mountain or a steep slope with complex terrain.

Description

All terrain matching linkage tracking photovoltaic bracket flexible driving device

Technical field

The invention relates to the field of photovoltaic brackets, in particular to a full-terrain matching linkage tracking photovoltaic bracket flexible driving device.

Background technique

Since the 1980s, various forms of tracking solar power systems developed by countries around the world have been widely used in photovoltaic power plants of various sizes. Among them, the most used is the linkage tracking bracket, which is the main method to improve the efficiency of solar cell power generation, direct, simple, reliable, low cost and most effective.

At present, the driving devices of the linkage tracking brackets at home and abroad use rigid motion pairs, such as the electric lever reducer (or electric push rod) + main push link + multi-row solar panels together with the push rod drive mode; Electric reducer + series connection drive shaft drive with universal joint drive shaft + multiple worm gear reducer + multi-row solar panel linkage; also use a drive shaft to drive multiple steel cables (or ultra high molecular weight polyethylene) Cable) Linked cable drive mode; and distributed electronic control linkage mode and so on. Although there are many applications of these linkage tracking bracket systems, the following deficiencies generally exist; because the tolerances of the rigid motion pairs must be within the specified range, they can operate normally. Especially in the linkage tracking bracket system, there are strict specifications for the concentricity of the column and the main axis of rotation, the parallelism between adjacent rows, the height difference, etc. The bracket needs to be installed on a set of planes, The standard requirements for land leveling are also very high. Uneven terrains such as barren hills and slopes will not be available, or large machinery will be required for finishing, and the cost and construction difficulty will be greatly increased.

According to engineering practice, in addition to the above problems, due to the large number of rigid moving sub-members, heavy weight, long processing and assembly cycle, it is time-consuming and labor-intensive, resulting in many unplanned costs for engineering construction and post-maintenance. At the same time, there are also problems in the operation due to factors such as gap, friction, wear, lubrication, foundation settlement and other factors that cause tracking accuracy and reliability.

In recent years, with the rapid development of photovoltaic power plants and the trend of less and less land resources available in the future, the search for the development of linkage tracking brackets that can be used in any complex terrain is an important issue that the current PV industry can develop rapidly and urgently. .

Summary of the invention

1. The problem to be solved

The invention aims at the deficiencies of the above-mentioned existing linkage tracking brackets, and provides a full-terrain matching linkage tracking photovoltaic bracket flexible driving device, which solves the linkage flat single-axis, the linkage oblique single-axis, the array-type linkage double-axis tracking bracket, and the land leveling standard High, can not be installed in the hills and steep slopes where the terrain is very complicated.

2. Technical solutions

The technical solution provided by the invention: an all-terrain matching linkage tracking photovoltaic bracket flexible driving device, including a reducer a sprocket and a column for supporting and rotating the solar panel, and a main beam movable on the column, the main beam being provided with a stringer for transmitting power in each row of solar panel arrays, between the purlins The tail end of the preceding string is connected to the front end of the latter string by the pulley A through the synchronous cable, and the end and the tail of the stringer are connected in series. The speed reducer sprocket drives the transmission chain to reciprocate and is respectively connected at both ends of the transmission chain. There are two traction cables, and the other ends of the two traction cables are connected to the synchronous cable via two pulleys B. Each of the two pulleys B is equipped with a counterweight for maintaining the automatic compensation of the transmission chain and the traction cable. Tension.

Further, the synchronization cable is tightly coupled to the traction cable by a collet at a central position of the synchronization cable.

Further, the stringer is hinged on the main beam by bolts, and the synchronous cable is pulled, and the stringers rotate synchronously.

Further, the column can also be replaced by a concrete pipe pile, and the weight is suspended on the concrete pipe pile when the concrete pipe pile is installed.

Further, depending on the complexity of the terrain, several sets of pulley-guided connections are used to meet the needs of complex terrain.

3. Beneficial effects

Compared with the prior art, the beneficial effects of the present invention are:

(1) Replacing the motion pair of the rigid transmission mechanism with a traction cable to drive the entire photovoltaic grid array, so that dozens of rows, even more arrays of bracket grids, along without any leveling of the land, along any Complex, high and low staggered terrain, and always keep each row of panels moving with the sun at the same angle.

(2) The synchronous cable is connected to the stringer supporting the solar panel through the pulley guide. Regardless of the spacing of the rows of the panels and the difference between the height and the height, the length difference of each segment of the synchronous cable can be adjusted to maintain each row of batteries. The plates rotate synchronously at the same angle. Since the traction force of the present invention is applied to both ends of the stringer, no excessive tremor occurs during operation, so that the accuracy of tracking the sun is higher and the life of the panel is longer.

(3) The driving method adopted by the invention is that the chain drives the traction cable to operate, and the weight adjustment tension is provided, which can avoid the trouble of directly reducing the frictional force and the slippage caused by the aging deformation and wear of the traction cable. Since one weight is connected to each end of the traction cable, the tension of the traction cable can be automatically compensated, the axial force of the output shaft can be greatly reduced, the operation is stable, the transmission ratio is more constant, and the power consumption is saved. It can be lower, its structure is simple and light, and it is easy to install. Moreover, the ability to withstand sudden external impact is stronger, especially when the wind is overloaded, it will not cause damage to the entire array. As long as several sets of guide pulleys are added, it can operate normally without being restricted by the transmission distance, angle and height difference of each row of panel arrays, and does not require special protection in working in a harsh environment.

DRAWINGS

1 is a schematic structural view of Embodiment 1 of the present invention;

2 is a schematic structural view of Embodiment 2 of the present invention;

3 is a schematic structural view of Embodiment 3 of the present invention;

In the picture: 1—檩, 2—synchronous cable, 3—speed reducer sprocket, 4—drive chain, 5—trailer cable, 6—weight, 7—clamp, 8—main beam, 9—pulley A, 10—Pulley B, 11—concrete pipe pile, 12—column.

detailed description

The invention is further described below in conjunction with specific embodiments.

Example 1

The all-terrain matching linkage tracking photovoltaic bracket flexible driving device shown in FIG. 1 comprises a reducer sprocket 3 and a column 12 for supporting and rotating the solar panel and a main beam 8 movable on the column, the main beam 8 is provided with a stringer 1 for transmitting power in each row of solar panel arrays, the stringer 1 is hinged on the main beam 8 by bolts, and the synchronous cable 2 is dragged, and the stringers 1 are synchronously rotated, and the stringers 1 are between The tail end of the preceding string is guided by the pulley A 9 to the front end of the latter string through the synchronous cable 2, and the head and tail of the stringer are connected in series, specifically, the N+1 section synchronous cable is connected in series from the N row of the battery board bracket. The function of the purlins is to maintain the synchronous rotation of each row of panels at the same angle by adjusting the length difference of each segment of the cable regardless of the spacing of the rows. The tail end of the front row of rafters is connected by a pair of synchronous cables to the front end of the second row of rafters via pulleys, and the other end of the second row of rafters is connected to the front end of the third row of rafters by pulleys. In this way, all the purlins are connected in series with a synchronizing cable, thus completing the synchronous transfer function of all the panel arrays. The reducer sprocket 3 drives the drive chain 4 to reciprocate, and two traction cables 5 are respectively connected at two ends of the drive chain 4, and the other end of the two traction cables 5 passes through two pulleys B 10 and a synchronous cable. The two phases are connected, and the two pulleys B 10 are each coupled with a counterweight 6 for maintaining the automatically compensated tension of the drive chain 4 and the traction cable 5.

The photovoltaic brackets can be arranged in an array, and the outer and outer rows of the two rows of battery panel brackets can also maintain the same angle and rotation as other row of strips. The central part of each section of the synchronous cable 2 is adjacent to the traction cable 5, and is locked and connected by the chuck 7 so that the traction force is distributed on the rows of the brackets to avoid the angular error caused by the rotation of a certain grid. The chain reaction of cumulative errors causes the entire stent array to track out-of-step phenomena.

Example 2

As shown in FIG. 2, the basic principle and structure of the second embodiment are the same as those of the first embodiment. The column 12 is replaced by a concrete pipe pile 11 which is suspended from the concrete pipe pile 11 when the concrete pipe pile 11 is installed. .

Example 3

FIG. 3 is a schematic view showing the structure of the present invention matched to the complex terrain of the mountain, the all terrain matching linkage tracking photovoltaic support flexible driving device, the reducer sprocket 3 and the column 12 for supporting and rotating the solar panel, and a main beam 8 on the column, the main beam 8 is provided with a stringer 1 for transmitting power in each row of solar panel arrays, and the tail end of the preceding string is passed between the beams 1 according to the needs of the terrain The synchronizing cable 2 is guided by a plurality of sets of pulleys A 9 to the front end of the latter purlin to realize the end-to-end series connection of the purlins. The speed reducer sprocket 3 drives the transmission chain 4 to reciprocate, and two ends of the transmission chain 4 are respectively connected. The root traction cable 5, the other end of the two traction cables 5 are respectively guided by a plurality of sets of pulleys A 9 Towards, the pulley B 10 is connected to the synchronizing cable 2, and each of the pulleys B 10 is coupled with a counterweight 6 for maintaining the automatically compensated tension of the transmission chain 4 and the traction cable 5.

The above description is only a detailed description of the specific embodiments of the present invention, and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made in the design of the present invention should be included in the protection of the present invention. Within the scope.

Claims

An all-terrain matching linkage tracking photovoltaic bracket flexible driving device, comprising: a reducer sprocket (3) and a column (12) for supporting and rotating the solar panel and a main beam capable of moving on the column (8) The main beam (8) is provided with a stringer (1) for transmitting power in each row of solar panel arrays, and the tail end of the preceding stringer is passed through the synchronous cable (2) A pair of pulleys A (9) are guided to the front end of the latter stringer to realize the end-to-end series connection of the stringers, and the reducer sprocket (3) drives the transmission chain (4) to reciprocate in the transmission chain (4) Two traction cables (5) are respectively connected at two ends, and the other ends of the two traction cables (5) are respectively connected with the synchronous cable (2) through the pulley B (10), and each of the pulleys B (10) is matched with one. Counterweight (6) for maintaining the automatically compensated tension of the drive chain (4) and the traction cable (5).
The all-terrain matching linkage tracking photovoltaic bracket flexible driving device according to claim 1, characterized in that the synchronous cable (2) and the traction cable are clamped by a collet (7) at a central position of the synchronous cable (2) ( 5) Lock the connection.
The all-terrain matching linkage tracking photovoltaic bracket flexible driving device according to claim 1, characterized in that: the purlin (1) is hinged on the main beam (8) by bolts, and the synchronous cable (2) is pulled, and the purlin (1) ) Synchronous rotation.
The all-terrain matching linkage tracking photovoltaic bracket flexible driving device according to claim 1, characterized in that: the column (12) can also be installed on a concrete pipe pile (11) (instead of), using a concrete pipe pile (11) When installed, the counterweight (6) is suspended from the concrete pipe pile (11).
The all-terrain matching linkage tracking photovoltaic bracket flexible driving device according to claim 1, characterized in that: according to the complexity of the terrain, a plurality of sets of pulley A guiding connections are used to meet the needs of complex terrain.