Flexible photovoltaic system and flexible photovoltaic support foundation thereof

Abstract

The utility model discloses a flexible photovoltaic system and a flexible photovoltaic support foundation thereof. The flexible photovoltaic support foundation comprises a pile body, a knob joint and a plurality of spiral blades. The bottom end of the pile body is of a tip structure, and the top end is used for being fixed to the bottom end of a stand column of the flexible photovoltaic support. The multiple spiral blades are fixed to the peripheral wall of the middle part of the pile body and distributed in the axial direction of the pile body at intervals. The outer walls of the pile body and the multiple spiral blades are each provided with a hot galvanizing anti-corrosion coating. The knob connector is detachably arranged at the top end of the pile body and used for being in butt joint and fixed with a knob head of knob equipment. The flexible photovoltaic support foundation is a spiral ground pile formed by fixing the multiple spiral blades to the peripheral wall of the middle part of the pile body at intervals in the axial direction, the spiral ground pile is used for being in butt joint fit with a rotary twisting head of rotary twisting equipment through the rotary twisting connector, and the spiral ground pile can be constructed in a rotary twisting mode conveniently; effective support can be provided for the bottom end of the flexible photovoltaic support, and the problems of two existing flexible photovoltaic support foundations are solved.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic manufacturing technology, and in particular to a flexible photovoltaic system and its flexible photovoltaic support foundation. Background Technology

[0002] Currently, flexible photovoltaic support foundations use cast-in-place concrete piles and precast concrete piles as foundations. However, these foundations have several drawbacks: long construction period, high cost, difficult on-site construction in mountainous areas, significant impact of cast-in-place concrete piles on the site environment, and numerous uncontrollable factors affecting the quality of these two types of piles, resulting in inconsistent pile foundation quality and posing certain safety hazards to the operation of photovoltaic power stations. Utility Model Content

[0003] In view of this, the present invention provides a flexible photovoltaic support foundation that can withstand vertical tensile and pull-out bearing capacity, effectively support the bottom of the flexible photovoltaic support under pressure, ensure the reliability and stability of the overall structure, and solve the problems existing in the two existing flexible photovoltaic support foundations.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A flexible photovoltaic support foundation includes: a pile, a torsion joint, and multiple helical blades;

[0006] The bottom end of the pile is a pointed structure, and the top end is used to fix it to the bottom end of the column of the flexible photovoltaic support.

[0007] Multiple helical blades are respectively fixed to the outer peripheral wall of the middle part of the pile body and are distributed at intervals along the axial direction of the pile body; wherein, the outer walls of the pile body and the multiple helical blades are provided with hot-dip galvanized anti-corrosion coating;

[0008] The rotary joint is detachably installed at the top of the pile and is used to connect and fix with the rotary head of the rotary device to rotary the pile into the soil.

[0009] Preferably, the pile body comprises a steel pipe;

[0010] Multiple helical blades are respectively welded to the outer peripheral wall of the lower middle part of the steel pipe and are evenly distributed along the axial direction of the steel pipe.

[0011] Preferably, the pitch of the helical blade is equal to the diameter of the steel pipe;

[0012] The distance between two adjacent helical blades is a multiple of the pitch of the helical blades.

[0013] Preferably, the steel pipe and / or the spiral blade are made of Q235B steel or Q355B steel.

[0014] Preferably, the toggle joint includes a flange joint.

[0015] Preferably, the flange joint includes: a sleeve portion and a flange portion;

[0016] The sleeve portion is detachably fitted onto the outer side of the top end of the pile body and is fixed to the outer side of the top end of the pile body by the first bolt assembly;

[0017] The disc portion is fixed to the top of the sleeve portion and is used to dock with the rotary head of the rotary device, and is provided with an assembly connection structure for cooperating with the rotary head.

[0018] Preferably, the assembly connection structure includes:

[0019] Multiple assembly connection holes are respectively opened through the method plate portion and evenly distributed around the center of the method plate portion; wherein, the multiple assembly connection holes are all arc-shaped elliptical holes.

[0020] Preferably, it also includes a sleeve;

[0021] The top end of the pile is connected and fixed to the bottom end of the column through a sleeve.

[0022] Preferably, one end of the sleeve is used to be fitted onto the outside of the top of the pile body and fixed to the outside of the top of the pile body by a second bolt assembly, and the other end is used to be fitted onto the outside of the bottom of the column and fixed to the outside of the bottom of the column by a third bolt assembly.

[0023] A flexible photovoltaic system includes a flexible photovoltaic support foundation, wherein the flexible photovoltaic support foundation is as described above.

[0024] As can be seen from the above technical solution, the flexible photovoltaic support foundation provided by this utility model is a spiral ground pile formed by fixing multiple spiral blades axially at intervals to the outer peripheral wall of the middle part of the pile body. Moreover, the top of the spiral ground pile is provided with a rotary joint for docking with the rotary head of the rotary device, which facilitates the construction of the spiral ground pile by rotary method. The spiral ground pile can withstand vertical tensile and pull-out bearing capacity, and can provide effective support for the bottom of the flexible photovoltaic support under pressure, ensuring the reliability and stability of the overall structure, while also solving the problems existing in the two existing flexible photovoltaic support foundations. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 A schematic diagram of the structure of the flexible photovoltaic support foundation provided in this embodiment of the utility model;

[0027] Figure 2 A schematic diagram of the structure of the spiral blade provided in an embodiment of this utility model;

[0028] Figure 3 A top view of the flange joint provided in an embodiment of this utility model;

[0029] Figure 4 A schematic diagram of the structure of a flexible photovoltaic support foundation provided in another embodiment of this utility model.

[0030] Wherein, 1 is the pile body, 2 is the helical blade, 3 is the flange joint, 31 is the sleeve part, 32 is the disc part, and 321 is the assembly connection hole. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] The flexible photovoltaic support foundation provided in this embodiment of the utility model, such as Figure 1 or Figure 4 As shown, it includes: pile body 1, torsion joint and multiple helical blades 2;

[0033] The bottom end of pile 1 is a pointed structure, and the top end is used to fix it to the bottom end of the column of the flexible photovoltaic support.

[0034] Multiple helical blades 2 are fixed to the outer peripheral wall of the middle part of the pile body 1 and are distributed at intervals along the axial direction of the pile body 1; wherein, the outer walls of the pile body 1 and the multiple helical blades 2 are provided with hot-dip galvanized anti-corrosion coating.

[0035] The rotary joint is detachably fixed to the top of the pile body 1 and is used to connect and fix with the rotary head of the rotary device to rotary the pile body 1 into the soil.

[0036] It should be noted that pile 1 is used for screwing into the soil, and the tip structure at its bottom end can be referenced. Figure 1 or Figure 4 As shown, the top is used to connect and fix to the bottom of the column of the flexible photovoltaic support; wherein, the pile body 1 can be a solid metal pile structure or a hollow metal pile structure. Figure 4 The height of the middle pile 1 is greater than Figure 1 The height of the central pile 1;

[0037] Multiple helical blades 2 are fixed to the outer peripheral wall of the middle part of the pile body 1 and are distributed at intervals along the axial direction of the pile body 1 to form a helical ground pile; the outer wall of the helical ground pile is provided with a hot-dip galvanized anti-corrosion coating to improve the corrosion resistance of the helical ground pile and enhance its service durability.

[0038] The torsion joint is detachably fixed to the top of the pile body 1 and is used to connect and fix with the torsion head of the torsion device to torsion drive the pile body 1 into the soil. Of course, multiple helical blades 2 will also be torsion driven into the soil along with the pile body 1. Among them, the helical blades 2 are torsion driven into (embedded) in the soil, forming a community with the soil and sharing the force. The force-bearing form is better than that of existing cylindrical concrete cast-in-place piles or precast concrete piles, and it also maximizes the bearing capacity of the soil and reduces the material consumption of the pile body 1. In addition, the bucket of the excavator can be modified into a hydraulic power head that matches the torque of the helical pile, and then the hydraulic power head can be connected and fixed with the torsion joint of the helical pile for torsion construction. Of course, after the helical pile is installed in place, the torsion joint needs to be disassembled to facilitate the subsequent fixing of the top of the helical pile to the bottom of the flexible photovoltaic support column.

[0039] In other words, the flexible photovoltaic support foundation provided by this solution is a spiral pile formed by fixing multiple spiral blades 2 axially at intervals to the outer peripheral wall of the middle part of the pile body 1. The top of the spiral pile is equipped with a torsion joint for docking with the torsion head of the torsion device, which facilitates the construction of the spiral pile by torsion. The spiral pile can withstand vertical tensile and pull-out bearing capacity, providing effective support for the bottom of the flexible photovoltaic support under pressure, ensuring the reliability and stability of the overall structure. It can also solve the problems existing in the two types of flexible photovoltaic support foundations. Of course, the spiral pile is quick to process and manufacture, has high construction efficiency, and is cheaper than the two existing pile types. Moreover, due to its light weight, it is convenient for secondary transportation and construction in mountainous areas, and it does not pollute the ecological environment. On-site, only the torsion process needs to be controlled to control the construction quality, and the stress result of the overall pile foundation is relatively uniform.

[0040] In this scheme, pile 1 includes a steel pipe;

[0041] like Figure 1 or Figure 4As shown, multiple helical blades 2 are welded to the outer circumferential wall of the lower middle part of the steel pipe, and are evenly distributed along the axial direction of the steel pipe. In other words, the helical pile provided by this scheme is formed by welding multiple helical blades 2 to the outer circumferential wall of the lower middle part of the steel pipe at equal intervals along the axial direction. This not only ensures the structural strength of the helical pile but also helps to improve its pull-out bearing capacity. Of course, multiple helical blades 2 can also be welded to the outer circumferential wall of the middle part of the steel pipe at equal intervals along the axial direction. Furthermore, the helical pile can be made by welding helical steel plate blades to the steel pipe, allowing for finished product processing in the factory. Compared to existing foundation pile types, it is lighter in weight, facilitating on-site transportation and construction. Moreover, since no concrete is used on-site, there is no environmental pollution. Furthermore, the helical blades of the helical pile are embedded in the soil, allowing for collaborative force distribution between the pile and the soil, maximizing the bearing capacity of the soil and reducing the material usage of the pile.

[0042] Specifically, the pitch of the spiral blade 2 is equal to the diameter of the steel pipe;

[0043] The distance between two adjacent helical blades 2 is a multiple of the pitch of the helical blade 2.

[0044] It should be noted that, as Figure 2 As shown, the spiral blade 2 is a full spiral blade. The pitch of the spiral blade 2 refers to the distance that the spiral blade 2 travels along the axis of the ground pile when it rotates once. It can reflect the "density" or "propulsion efficiency" of the spiral blade 2. Of course, the smaller the pitch, the denser the spiral blade 2 is, the greater the resistance when it enters the soil, but the stronger the grip. In other words, a smaller pitch can increase the contact area between the spiral ground pile and the soil and improve the pull-out resistance.

[0045] In addition, this solution provides a multi-bladed helical pile. The spacing between two adjacent helical blades 2 refers to the axial distance between two adjacent helical blades 2 in the multi-bladed helical pile, which can reflect the distribution interval between the blades. Of course, too small a spacing will lead to excessive soil compression and increase the difficulty of installation, while too large a spacing will reduce the overall stability. Therefore, a reasonable spacing can allow multiple helical blades 2 to compact the soil in layers and improve the overturning resistance.

[0046] Preferably, the diameter of the steel pipe can be 140mm, the pitch of the helical blade 2 can be 140mm, the diameter of the helical blade 2 can be 700mm, and the spacing between two adjacent helical blades 2 can be three or four times the pitch of the helical blade 2. Of course, the diameter of the steel pipe, the diameter of the helical blade 2, the spacing of the helical blade 2, and the opening pitch of the helical blade 2 all need to be calculated and determined according to mechanical calculation formulas. After determination, test piles should be carried out to verify the calculation results and the actual stress effect. That is to say, the number, spacing, and stress of the helical blades 2 need to be analyzed in detail to formulate a helical ground pile that meets the stress characteristics of flexible photovoltaic support (the stress of flexible photovoltaic support is greater than that of rigid photovoltaic support). Of course, since the stress of helical ground piles is relatively complex, the problem cannot be solved by simply increasing the pile length and increasing the blade diameter. It is necessary to conduct on-site tests to verify the actual feasibility of the construction machinery.

[0047] Furthermore, to ensure the structural strength and durability of the helical piles, it is preferable that the steel pipe and / or helical blade 2 be made of Q235B steel or Q355B steel. Specifically, both the steel pipe and the helical blade 2 can be made of Q235B steel or Q355B steel.

[0048] Furthermore, such as Figure 1 or Figure 4 As shown, the torsion joint includes a flange joint 3. The flange joint 3 is used to fit and fix itself to the top of the pile body 1, and to connect and fix with the torsion head of the torsion device, thus facilitating the screwing of the helical pile into the soil. After construction is completed (once the helical pile is in place), the flange joint 3 needs to be disassembled and can be used for the driving of the next helical pile. In other words, this scheme uses the flange joint 3 as the torsion joint, which has a simple structure and convenient connection.

[0049] In this plan, such as Figure 1 As shown, the flange joint 3 includes: a sleeve portion 31 and a flange portion 32;

[0050] The sleeve part 31 is detachably fitted onto the outer side of the top end of the pile body 1 and is fixed to the outer side of the top end of the pile body 1 by the first bolt assembly;

[0051] The disc part 32 is fixed to the top of the sleeve part 31 and is used to dock with the rotating head of the rotating device, and is provided with an assembly connection structure for cooperating with the rotating head.

[0052] The sleeve portion 31 and the top of the pile body 1 are both provided with first internal threaded through holes in the radial direction. After the sleeve portion 31 is fitted onto the outer side of the top of the pile body 1, the sleeve portion 31 and the first internal threaded through holes of the pile body 1 can be locked by first bolts. Of course, there can be multiple first bolts, and the above method can be used to lock the sleeve portion 31 and the top of the pile body 1 from different radial directions, thereby fixing the sleeve portion 31 to the outer side (outer peripheral wall) of the top of the pile body 1. The flange portion 32 can be a disc structure and can be an integral structure with the sleeve portion 31, and is used for docking and assembly connection with the rotating head of the rotating device. In other words, the flange joint 3 is designed in this way to make the docking and assembly connection between the top of the helical pile and the rotating head of the rotating device more reliable.

[0053] Specifically, such as Figure 3 As shown, the assembly connection structure includes:

[0054] Multiple assembly connection holes 321 are respectively opened through the plate portion 32 and evenly distributed around the center of the plate portion 32; wherein, the multiple assembly connection holes 321 are all arc-shaped elliptical holes.

[0055] Among them, such as Figure 3 As shown, there can be four assembly connection holes 321, which are evenly distributed around the center of the disc portion 32. Each assembly connection hole 321 is an arc-shaped elliptical hole, and each arc-shaped elliptical hole is concentric with the disc portion 32. In this way, when the rotary head of the rotary device is connected and fixed to the multiple assembly connection holes 321 of the disc portion 32 by the bolt assembly, there is an adjustment margin, thereby ensuring that the rotary head of the rotary device can be connected and fixed to the multiple assembly connection holes 321 of the disc portion 32. Of course, the assembly connection structure of the disc portion 32 is designed in this way, which is simple in structure and convenient in connection.

[0056] Furthermore, the flexible photovoltaic support foundation provided in this embodiment of the present invention also includes a sleeve;

[0057] The top of pile 1 is connected and fixed to the bottom of the column through a sleeve. In other words, after the helical pile is driven into place, the top of the helical pile is connected and fixed to the bottom of the column of the flexible photovoltaic support through a sleeve.

[0058] Furthermore, one end of the sleeve is used to be fitted onto the outer side of the top of the pile body 1 and fixed to the outer side of the top of the pile body 1 by the second bolt assembly, and the other end is used to be fitted onto the outer side of the bottom of the column and fixed to the outer side of the bottom of the column by the third bolt assembly.

[0059] The sleeve has a second internal threaded through hole radially between one end (lower end) and the top of the pile body 1 (steel pipe). After one end of the sleeve is fitted onto the outside of the top of the pile body 1, the sleeve and the second internal threaded through hole of the pile body 1 can be locked together by a second bolt. Of course, there can be multiple second bolts, and the above method can be used to lock one end of the sleeve and the top of the pile body 1 from different radial directions, thereby fixing one end of the sleeve to the outside (outer peripheral wall) of the top of the pile body 1. Similarly, the other end of the sleeve (upper end) and the bottom end of the column have a third internal threaded through hole radially between them. After the other end of the sleeve is fitted onto the outside of the bottom end of the column, the sleeve can be locked together by a third bolt. The pipe and the column have a third internal threaded through hole. Of course, there can be multiple third bolts. Using the above method, the other end of the sleeve and the bottom end of the column can be locked from different radial directions, thereby fixing the other end of the sleeve to the outside (outer peripheral wall) of the bottom end of the column. In addition, to ensure that the connection between the upper and lower end faces of the sleeve is sealed and waterproof, a waterproof rubber sleeve is provided between one end face of the sleeve (i.e., the lower end face) and the outer peripheral wall of the top of the pile 1, and a waterproof rubber sleeve is also provided between the other end face of the sleeve (i.e., the upper end face) and the outer peripheral wall of the bottom end of the column. That is to say, the top end of the pile 1 is connected to the bottom end of the column through the sleeve, which makes the connection between the top end of the pile 1 and the bottom end of the column more secure and reliable.

[0060] This utility model embodiment also provides a flexible photovoltaic system, including a flexible photovoltaic support foundation, which is the flexible photovoltaic support foundation as described above. Since this solution uses the aforementioned flexible photovoltaic support foundation, it has corresponding beneficial effects, as detailed in the preceding description, which will not be repeated here.

[0061] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0062] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A flexible photovoltaic racking foundation, characterized by, The utility model relates to a flexible photovoltaic support foundation, including: A pile body (1), a screw joint and a plurality of spiral blades (2); The bottom end of the pile body (1) is a pointed end structure, and the top end is used for being fixed with the bottom end of a column of a flexible photovoltaic support; A plurality of spiral blades (2) are respectively fixed to the outer wall of the middle part of the pile body (1) and are spaced along the axial direction of the pile body (1); wherein the outer wall of the pile body (1) and a plurality of spiral blades (2) are provided with a hot-dip galvanizing anticorrosive coating; The screw joint is detachably arranged at the top end of the pile body (1) and is used for being fixed with a screw head of a screwing device to screw the pile body (1) into the soil.

2. The flexible photovoltaic racking foundation of claim 1, wherein, The pile body (1) comprises a steel pipe; A plurality of spiral blades (2) are respectively welded to the outer wall of the middle and lower part of the steel pipe and are equally spaced along the axial direction of the steel pipe.

3. The flexible photovoltaic racking foundation of claim 2, wherein, The pitch of the spiral blade (2) is equal to the diameter of the steel pipe. The pitch of the spiral blade (2) is equal to the diameter of the steel pipe.

4. The flexible photovoltaic racking foundation of claim 2, wherein, The pitch of the spiral blade (2) is equal to the diameter of the steel pipe.

5. The flexible photovoltaic racking foundation of claim 1, wherein, The steel pipe and / or the spiral blade (2) adopts Q235B steel or Q355B steel.

6. The flexible photovoltaic racking foundation of claim 5, wherein, The screw joint comprises a flange joint (3). The flange joint (3) comprises a sleeve part (31) and a flange part (32); The sleeve part (31) is detachably sleeved on the outside of the top end of the pile body (1) and is fixed on the outside of the top end of the pile body (1) through a first bolt assembly; 7. The flexible photovoltaic racking foundation of claim 6, wherein, The flange part (32) is fixed to the top end of the sleeve part (31) and is used for being connected with the screw head of the screwing device and is provided with an assembly connecting structure for cooperating with the screw head. The assembly connecting structure comprises:

8. The flexible photovoltaic racking foundation of claim 1, wherein, A plurality of assembly connecting holes (321) are respectively formed through the flange part (32) and are uniformly distributed around the center of the flange part (32); wherein a plurality of assembly connecting holes (321) are arc-shaped oval holes. Further comprising a sleeve; 9. The flexible photovoltaic racking foundation of claim 8, wherein, The top end of the pile body (1) is connected and fixed with the bottom end of the column through the sleeve.

10. A flexible photovoltaic system comprising a flexible photovoltaic support base, characterized in that, One end of the sleeve is used for being sleeved on the outside of the top end of the pile body (1) and is fixed on the outside of the top end of the pile body (1) through a second bolt assembly, and the other end is used for being sleeved on the outside of the bottom end of the column and is fixed on the outside of the bottom end of the column through a third bolt assembly. The flexible photovoltaic support foundation is the flexible photovoltaic support foundation in any one of claims 1-9.

Images