CN114866006A

CN114866006A - Truss type photovoltaic array with large-spacing support foundation

Info

Publication number: CN114866006A
Application number: CN202110156047.7A
Authority: CN
Inventors: 吴建农; 周孝水; 郑道涛; 周会晶; 郑华荣
Original assignee: Tonking New Energy Technology Jiangshan Co ltd
Current assignee: Tonking New Energy Technology Jiangshan Co ltd
Priority date: 2021-02-04
Filing date: 2021-02-04
Publication date: 2022-08-05

Abstract

A large standoff based truss photovoltaic array comprising: the photovoltaic support frame comprises a plurality of rows of photovoltaic support frames which extend along a first direction, and each row of photovoltaic support frames is arranged on the basis of each row of support frames; the photovoltaic main shafts/purlines extend along the second direction and are arranged on each row of photovoltaic supports and used for mounting photovoltaic modules; and the cross beams are bridged on every two rows of support bases along the first direction, at least one photovoltaic main shaft/purlin used for mounting a photovoltaic assembly is arranged in the middle of each cross beam, and the cross beams, the support bases and the photovoltaic main shafts/purlins form a truss structure. The invention increases the movable space below the photovoltaic array, the cross beam can be used as a laying channel of a photovoltaic cable, and the cross beam, the support foundation and the photovoltaic main shaft are mutually connected to form a truss structure, thereby reducing the overall cost while ensuring the safety and reliability of the photovoltaic array.

Description

Truss type photovoltaic array with large-spacing support foundation

Technical Field

The invention relates to a solar photovoltaic array, in particular to a truss type photovoltaic array with a large-spacing support foundation.

Background

Solar photovoltaic panels, particularly large area arrays of solar photovoltaic panels or photovoltaic systems, can be fully exposed to sunlight when installed on the ground or on a surface of water. Particularly, the photovoltaic support array with the automatic tracking device can track the movement of the sun in real time and adjust the orientation (such as the movement from east to west) of the photovoltaic module, so that sunlight directly irradiates to a light receiving plane of the photovoltaic panel, and the photovoltaic power generation amount is improved. However, in the conventional photovoltaic rack array, for example, the photovoltaic rack array 10 shown in fig. 1, a row of photovoltaic modules 12 is installed on a row of rack foundations 11, which is large in usage amount and high in cost. In addition, in order to improve the utilization rate of the land or water area, the space between two adjacent rows of support foundations 11 of the existing photovoltaic support array is designed to be small, so that the movement space of the ground or the water surface is reduced, and the construction and the daily maintenance of projects are not facilitated, and the agricultural cultivation on the ground or the fishery operation on the water surface is also not facilitated. Moreover, in the photovoltaic support array in the prior art, the power cable and the power cable need to be additionally laid on a bridge frame in the east-west routing process or a cable trench is dug on the ground, so that the problems of complex construction, high cost and the like are caused.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide a truss type photovoltaic array with a large-distance support foundation.

The invention relates to a truss type photovoltaic array of a large-spacing support foundation, which comprises:

the photovoltaic support frame comprises a plurality of rows of photovoltaic support frames which extend along a first direction, and each row of photovoltaic support frames is arranged on the basis of each row of support frames;

the photovoltaic main shafts/purlines extend along the second direction and are arranged on each row of photovoltaic supports and used for mounting photovoltaic modules; and

a beam bridged on the bases of every two rows of brackets along a first direction, at least one photovoltaic main shaft/purlin used for mounting a photovoltaic assembly is arranged on the beam,

the cross beam, the support foundation and the photovoltaic main shaft/purline form a truss structure.

And the photovoltaic modules arranged on the cross beam are positioned between two adjacent groups of photovoltaic modules arranged on the support foundation.

And a support foundation is not arranged below the photovoltaic module arranged on the cross beam.

The beam also serves as a cable bridge of the photovoltaic array.

The photovoltaic array also comprises tracking devices arranged on the support foundation and the cross beam and used for tracking the movement of the sun in real time.

Be provided with the stand on the support basis, tracking means is including setting up main shaft bearing frame on the stand, with the perpendicular push rod that sets up of photovoltaic main shaft and movably the swing arm of connecting between push rod and main shaft.

A rotary speed reducer and a control box are mounted on the stand column of the support foundation and used for adjusting the steering of the photovoltaic module by tracking the movement of the sun from east to west

The photovoltaic main shaft tracking device is characterized in that a stand column is arranged in the middle of the cross beam, and the tracking device comprises a main shaft bearing seat arranged on the stand column, a push rod perpendicular to the photovoltaic main shaft and a swing arm movably connected between the push rod and the main shaft.

The first direction is the east-west direction, and the second direction is the north-south direction.

The support foundation is connected with the upright post through bolts and/or welding.

According to the truss type photovoltaic array with the large-spacing support bases, the cross beam is arranged between two adjacent rows of support bases, at least one row of photovoltaic modules are arranged on the cross beam at the middle position, and the support bases are not arranged below the cross beam, so that the spacing between the support bases is greatly expanded, and the activity space below the photovoltaic array is enlarged. Meanwhile, the cross beam can be used as a laying channel of the photovoltaic cable, extra cable bridges or cable trench engineering is reduced, and the cost of the array is greatly reduced. Moreover, the cross beam, the support foundation and the photovoltaic main shaft are connected with each other to form a truss structure, so that the local stress of the array can be reduced, the stress of the foundation can be balanced, the specification of the foundation can be reduced, and the overall cost is reduced while the safety and the reliability of the photovoltaic array are ensured.

Drawings

Fig. 1 is a schematic diagram showing a prior art photovoltaic stent array.

Fig. 2 is a schematic perspective view of a truss-like photovoltaic array illustrating a large-pitch stent foundation according to an embodiment of the invention.

Fig. 3 is a side view of the photovoltaic array shown in fig. 2.

Fig. 4 is a partial perspective view of a lattice photovoltaic array based on the large standoff shown in fig. 2.

Fig. 5 is a partial enlarged view of the photovoltaic array shown in fig. 4.

Fig. 6 is a schematic perspective view of a lattice photovoltaic array showing a large standoff foundation according to another embodiment of the present invention.

FIG. 7 is a schematic diagram showing a tracking device of the photovoltaic array of FIG. 6 mounted on a support base.

FIG. 8 is a schematic diagram showing a tracking device of the photovoltaic array of FIG. 6 positioned on a beam.

Detailed Description

The invention will be described in detail with reference to the drawings and examples, and those skilled in the art will understand that the examples shown in the drawings are only schematic and are used to help understand the basic concept of the invention. Other advantages and features of the present invention will become apparent from the following description.

Fig. 2 is a schematic perspective view of a truss-like photovoltaic array based on a large-pitch stent according to an embodiment of the invention, and fig. 3 is a side view of the photovoltaic array shown in fig. 2. Referring to fig. 2 and 3 in combination, the photovoltaic array according to the present invention includes, for example, a plurality of rows of support bases 21 extending in an east-west direction (hereinafter also referred to as a first direction), and each row of support bases 21 is provided with a photovoltaic module 22 extending in a north-south direction (hereinafter also referred to as a second direction), thereby forming a photovoltaic array. East-west beams 23 are also provided across each column of support bases 21 in the first direction of the photovoltaic array, for example, each beam 23 is provided between two adjacent columns of support bases 21 in the east-west direction of the photovoltaic array, and a plurality of beams 23 are provided, for example, in the north-south direction, thereby forming at least one column of beams 23 located between two adjacent columns of support bases 21. One or more rows of photovoltaic modules 22 'are mounted on the beam 23, for example in the east-west direction at intermediate locations, the latter extending in the north-south direction of the array, with the photovoltaic modules 22' being located intermediate two adjacent rows of photovoltaic modules 22 mounted on the carrier base 21. Because photovoltaic module 22' installs on east west to crossbeam 23, does not occupy support basis 21, so the use amount of the support basis that has significantly reduced has not only reduced man-hour and the manpower of project construction, greatly reduced the whole cost of project moreover. For example, when one row of photovoltaic modules 22 'are mounted on the east-west beam 23, the usage amount of the support base 21 is only 1/2, when two rows of photovoltaic modules 22' are mounted on the east-west beam 23, the usage amount of the support base 21 is only 1/3, and so on. Furthermore, since there is no support base 21 under the photovoltaic module 22', the distance between the rows of support bases 21 can be greatly expanded, for example, at least doubled compared to the original design, compared to the design of the prior art. Therefore, the movable space below the photovoltaic array is greatly improved, the operation of various engineering machines in the array installation and maintenance process is facilitated, and the development of subsequent ground agricultural operation or water surface fishery operation is facilitated.

Fig. 4 is a partial perspective view illustrating a lattice-type photovoltaic array based on the large-open-pitch stent shown in fig. 2, and fig. 5 is a partial enlarged view illustrating the photovoltaic array shown in fig. 4. Referring collectively to fig. 2-5, the top of the rack base 21 is provided with a column 215 supporting a photovoltaic main shaft/purlin 25 (sometimes referred to as a main shaft in a tracking photovoltaic rack and a purlin in a non-tracking photovoltaic rack), and a connector 235 is provided between the rack base 21 and the column 215, for example, which is connected to the rack base 21 and/or the column 215, for example, by welding or screwing. The east-west beam 23 is erected between two adjacent columns of support foundations 21, the two adjacent columns of support foundations 21 are connected into a whole, and then the truss structure in the photovoltaic array is formed together with the main shafts 25 and 25 'of the photovoltaic modules 22 and 22' in the north-south direction. Therefore, the stress of the connected support foundation 21 can be balanced by utilizing the force transmission from the east and west beams 23 and the photovoltaic main shaft 25 (25'), the stress of a part of pile foundations can be reduced, and the problem that the specifications of the part of pile foundations need to be increased due to the fact that the stress of the part of pile foundations is large is solved.

The east-west beam 23 is made of, for example, a steel pipe with a rectangular cross section, and those skilled in the art will appreciate that the beam 23 may be made of steel pipes with other cross sections or similar materials. The cross beam 23 is erected between two adjacent rows of the support foundations 21, the photovoltaic module 22' is installed on the middle position 231, and the support foundations 21 are not arranged below the photovoltaic module. The two ends 232 of the cross beam 23 are fixed on the bracket bases 21 through connectors 235, and preferably, an oblique supporting member 236 is provided between the middle position of the cross beam 23 and two adjacent bracket bases 21, for example, to strengthen the supporting force of the cross beam 23. According to another embodiment of the invention, the beam 23 arranged along the east-west direction can also be used as a cable bridge of the whole photovoltaic array, for example, power cables and power cables of the photovoltaic array can be laid on or in the beam 23, so that the problems that additional bridge laying is needed for cable routing, or construction difficulty and cost are high when cable trenches are excavated on the ground are solved, and the comprehensive cost of the project is greatly reduced.

Fig. 6 is a schematic perspective view showing a truss-type photovoltaic array of a large-distance rack foundation according to another embodiment of the present invention, fig. 7 is a schematic view showing a tracking device of the photovoltaic array shown in fig. 6 disposed on a rack foundation 21, and fig. 8 is a schematic view showing a tracking device of the photovoltaic array shown in fig. 6 disposed on a beam 23. Referring to fig. 6 to 8 in combination, according to another embodiment of the present invention, the truss-type photovoltaic array based on a large-distance support has an automatic tracking device, which can track the movement of the sun in real time and adjust the orientation (e.g., the movement from east to west) of the photovoltaic module, so that the sunlight always directly irradiates the light receiving plane of the photovoltaic panel, thereby increasing the photovoltaic power generation amount. Preferably, tracking means are mounted, for example, on the support base 21 and on the cross beam 23. The tracking device mounted on the support base 21 includes, for example, a spindle bearing seat 65 provided on the upright 215, a push rod 61 arranged perpendicular to the photovoltaic spindle 25, and a swing arm 62 movably connected between the push rod 61 and the spindle 25. The tracking device mounted on the cross beam 23 comprises, for example, a spindle bearing seat 65 arranged at a middle position 231 of the cross beam 23, a push rod 61 arranged perpendicular to the photovoltaic spindle 25, and a swing arm 62 movably connected between the push rod 61 and the spindle 25

In detail, as shown in fig. 7, a rotary speed reducer 66 and a control box 67 are mounted on the upright post 215 of at least one of the support bases 21 in the east-west direction for adjusting the turning direction of the photovoltaic module 22 by tracking the movement of the sun from the east-west direction. In particular, the photovoltaic module 22 is fixed to a photovoltaic main shaft 25, which is movably mounted on the upright 215 by means of a bearing housing 27. On the one hand, the rotary speed reducer 66 is, for example, fitted over the bearing housing 27, and the control box 67 controls the movement of the sun to drive the photovoltaic main shaft 25 and further the steering of the photovoltaic module 22. On the other hand, the swing arm 62 fixed to the photovoltaic main shaft 25 swings left and right in accordance with the steering of the main shaft 25, and in turn drives the push rod 61 to move, for example, in the east-west direction.

The upright posts 215 of the other support bases of the support base 21 in the east-west direction are simply and easily provided with bearing sleeves 27 for movably mounting the photovoltaic main shaft 25, the photovoltaic main shaft 25 is also fixedly mounted with a swing arm 62 and is connected to the push rod 61 through the swing arm 62, and when the push rod 61 moves in the east-west direction under the driving of the rotary speed reducer 66, the swing arm 62 can drive the photovoltaic main shaft 25 and further drive the photovoltaic module 22 to turn, so that the tracking of the running track of the sun is realized.

With particular reference to fig. 8, the tracking device mounted on the cross beam 23 at a central position 231 thereof comprises a spindle bearing support 65 arranged on the upright 215', a thrust rod 61 arranged perpendicularly to the photovoltaic spindle 25, and a swing arm 62 movably connected between the thrust rod 61 and the spindle 25. Wherein, the bottom end of the upright post 215' is fixedly installed at the middle position of the cross beam 23, for example, the bottom end of the swing arm 62 is installed on the push rod 61, and the top end thereof is fixed on the photovoltaic main shaft 25 through the hoop 68, for example. When the push rod 61 moves in the east-west direction under the driving of the rotary speed reducer 66, the swing arm 62 can drive the photovoltaic main shaft 25 and further drive the photovoltaic module 22' to turn, so as to track the running track of the sun. The above description is only a few examples of large-pitch rack-based photovoltaic arrays according to the present invention, and those skilled in the art can make various changes and modifications according to the above-described concept of the present invention, but they fall within the scope of the present invention.

Claims

1. A large standoff based truss photovoltaic array comprising:

2. The photovoltaic array of claim 1, wherein the photovoltaic modules mounted on the beam are positioned intermediate two adjacent groups of photovoltaic modules mounted on the foundation of the rack.

3. The photovoltaic array of claim 2, wherein no scaffolding foundation is provided beneath the photovoltaic modules mounted on the beam.

4. The photovoltaic array of claim 1 or 2, wherein the beam doubles as a cable tray for the photovoltaic array.

5. The photovoltaic array of claim 1 or 2, further comprising tracking means disposed on the base and the beam of the rack for tracking the movement of the sun in real time.

6. The pv array according to claim 5 wherein the support is provided with a post, and the tracking device comprises a spindle bearing seat disposed on the post, a push rod disposed perpendicular to the pv spindle, and a swing arm movably connected between the push rod and the spindle.

7. The photovoltaic array of claim 6, wherein a slewing reducer and a control box are mounted on the columns of the support base for tracking the movement of the sun from east to west to adjust the steering of the photovoltaic module.

8. The array of claim 5, wherein the beam has a post disposed at a central location thereof, and the tracking device includes a spindle bearing seat disposed on the post, a push rod disposed perpendicular to the photovoltaic spindle, and a swing arm movably connected between the push rod and the spindle.

9. The photovoltaic array of claim 1 or 2, wherein the first direction is east-west and the second direction is north-south.

10. The photovoltaic array of claim 6, wherein the support base is connected to the column by bolts and/or welding.