Pivotable support structure for cross canal solar array
A cross canal support structure for photovoltaic cells is disclosed. The structure includes a major frame having disconnectable and hinged connections to anchors at its corners, on either side of the canal. The major frame carries a plurality of minor frames, which are inclinable at an angle with respect to the major frame with the use of fixed or adjustable mounting plates. The combination of the major frame's tilt and the minor frame tilt enables fabrication of support structures that hold panels at latitude inclination for various portions of a canal.
1. A support structure for carrying a plurality of photovoltaic panels and spanning an underlying space, the support structure comprising;
a major frame having a first dimension greater than a predetermined distance to be spanned, the major frame defining a first plane, the major frame having a first side and a second, opposite side;
a plurality of minor frames configured to be supported by the major frame, each minor frame defining a second plane, and each minor frame being coupled to the major frame such that the second plane makes a predetermined angle with the first plane;
a plurality of ground anchors coupled to and proximate to ground and arranged to provide vertical support at a plurality of points around an outside perimeter of the major frame;
wherein, the major frame is coupled to one or more of a plurality of first ground anchors by hinged connections along the first side of the major frame;
wherein the major frame further comprises a plurality of weld tubes arranged along the second side and fixedly coupled to the major frame, the weld tubes extending downwardly away from the plane of the major frame, the weld tubes having a maximal transverse outer dimension; and
wherein second ground anchors support the second side of the major frame and are proximately coupled to anchor joints comprising upwardly extending mutually parallel tabs having a maximal transverse inner spacing greater than the maximal transverse outer dimension of the weld tubes, the tabs sized to accept the weld tubes arranged on the second side of the major frame between the tabs and form a disconnectable, hinged connection thereto;
and wherein the support structure includes columns having a lower end having the same transverse dimensions as the weld tubes and an upper end having a column joint, the column joint comprising upwardly extending mutually parallel tabs having a maximal transverse inner spacing greater than the maximal transverse outer dimension of the weld tubes, the lower end being arranged between the tabs of the anchor joints and the weld tubes being arranged between the tabs of the column joints such that disconnectable, hinged connections are formed between the columns and the major frame at the second side and between the columns and the anchor joints.
2. The structure of claim 1 , wherein, each of the connections between the major frame and the ground anchors is disconnectable such that the major frame can be disconnected from the ground anchors.
3. The structure of claim 1 , wherein each disconnectable, hinged connection between each anchor joint and a corresponding weld tube comprises a hinge pin insertable though apertures in the anchor joint tabs and corresponding apertures in walls of the weld tubes such that the tube may rotate around the hinge pin.
4. The structure of claim 3 , wherein the hinge pin is temporarily securable to each anchor joint with one of a nut or a cotter pin.
5. The structure of claim 4 , wherein the major frame is coupled to the anchor joint by passing the hinge pin through the anchor joint and through a weld tube coupled to the major frame.
6. The structure of claim 1 , wherein the upper end of the column is coupled to the major frame through the hinged connection comprising the column joint configured to receive a hinge pin, and a hinge pin temporarily securable to the column joint.
7. The structure of claim 6 , wherein the hinge pin is temporarily securable to the column joint with one of a nut or a cotter pin.
8. The structure of claim 6 , wherein the major frame is coupled to the column joint by passing the hinge pin through the column joint and through the weld tube coupled to the major frame.
9. The structure of claim 1 , wherein the major and minor frames are rectangular, and wherein the one or more of the plurality of ground anchors are configured to provide vertical support to the corners of the major frame.
10. The structure of claim 1 , further including, for each minor frame, a pair of mounting plates that, when coupled to the major frame and the minor frame, determine the angle the second plane makes with respect to the first plane.
11. The structure of claim 10 , wherein each of the pair of mounting plates includes an arcuate slot through which a minor frame can be secured to the mounting plate so as to permit an installer of a minor frame to couple the minor frame to the major frame such that the second plane is set at an installer-selectable angle within a range of angles relative to the first plane.
12. A photovoltaic panel installation capable of spanning a space, the installation comprising:
a plurality of minor frames, each carrying a plurality of solar panels, the minor frames comprising a rectangular frame having two opposing long ends and two opposing short ends;
a rectangular major frame configured to support the plurality of minor frames;
a plurality of support columns arranged along one long end of the major frame between the major frame and the ground;
a first set of hinged connections on a first side of the major frame proximate to the ground, a second set of hinged connections on a second side of the major frame, the second set of hinged connections being configured to couple the second side of the major frame to one or more vertical columns such that the major frame is inclined at a non-zero angle relative to the horizontal, and a third set of hinged connections between lower ends of the vertical columns and ground anchors proximate to the ground and wherein
the minor frames are inclined at a non-zero angle with respect to a plane defined by the major frame.
13. The installation of claim 12 , wherein a combination of an angle of inclination of the major frame with respect to the horizontal and an angle of inclination of a minor frame with respect to a plane defined by the major frame results in a photovoltaic panel carried by the minor frame being inclined at an angle approximately equal to a latitude of the installation.
14. The installation of claim 12 , wherein the first, second and third sets of hinged connections are disconnectable.
15. The installation of claim 12 , further including an electrical inverter electrically coupled to one or more of the plurality of solar panels, the electrical inverter having an AC output including a disconnectable terminal.