Modular large-span overwater photovoltaic system construction method

Abstract

The application discloses a modular large-span water photovoltaic system construction method, which comprises the following steps: step A, assembling a photovoltaic panel structure module and installing a lifting rope; step B, fixing a precast pile in water; step C, hoisting the photovoltaic panel structure module onto a transport ship and stacking the photovoltaic panel structure module up and down; step D, transporting the photovoltaic panel structure module to a designated position by the transport ship; step E, hoisting the photovoltaic panel structure module and connecting the photovoltaic panel structure module with the precast pile, and then fixing the photovoltaic panel structure module and the precast pile; and step F, hoisting and installing the remaining photovoltaic panel structure modules by the same method as that in step E until a water photovoltaic system with a designed shape and size is formed. The application guarantees the installation quality of the photovoltaic panel structure module, improves the installation efficiency, transports the photovoltaic panel structure module stacked up and down, improves the transportation efficiency, and avoids damage to the structure of the photovoltaic panel structure module caused by movement.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of photovoltaic panel construction, and particularly relates to a modular large-span water photovoltaic system construction method. BACKGROUND

[0002] At present, photovoltaic frames are mainly divided into rigid photovoltaic supports and flexible photovoltaic supports. The rigid photovoltaic support is generally connected by means of inclined support of a photovoltaic panel and a pile. The flexible photovoltaic support mainly bears the load of the upper photovoltaic panel through a prestressed cable.

[0003] For the rigid photovoltaic support, the area managed by a single pile is small, so that when the photovoltaic panels of the same area are laid out, a large number of piles are required. For the case where the pile driving cost is high (such as pile driving at sea for a large-span structure), it is not economical.

[0004] Therefore, in the construction of a large-span water photovoltaic system, the prior art adopts a flexible support, piles are first driven in water, a connecting member is then arranged on the piles, a prestressed cable is then tensioned on the connecting member, and a photovoltaic panel is then installed on the prestressed cable. However, the following technical problems exist: (1) the arrangement and tensioning of the prestressed cable need a transport ship to pull back and forth, which reduces the construction efficiency; (2) the installation of the piles and the connecting member, the adjustment and tensioning of the prestressed cable need to be constructed on site, and the construction quality cannot be guaranteed; and (3) the photovoltaic panel needs to be transported to a designated installation point on water by a transport ship, and the photovoltaic panel is installed on the prestressed cable, which has a safety hazard, and when the photovoltaic panel is installed near the middle of the span, the installation position is far away from the piles on both sides, and the construction is inconvenient. SUMMARY

[0005] The application aims to solve the above technical problems in the prior art, and provides a modular large-span water photovoltaic system construction method. A photovoltaic panel structure module is formed by using a plurality of photovoltaic panels and support structures. The module can be assembled on land to ensure the installation quality of the photovoltaic panel structure module. The photovoltaic panel structure module can be installed on water. The photovoltaic panel structure module and a prefabricated pile are fixed by butt joint through a hoisting ship. The photovoltaic panel does not need to be laid separately on water, the installation efficiency is improved, the photovoltaic panel structure module is transported by stacking up and down, the number of transportation is large, the transportation efficiency is improved, the structure of the photovoltaic panel structure module is protected from damage caused by movement, and the protection effect is achieved.

[0006] In order to solve the above technical problems, the application adopts the following technical scheme:

[0007] The modular large-span water photovoltaic system construction method comprises the following steps:

[0008] Step A, fixing a plurality of photovoltaic panels at a set inclination angle on a support structure on land, the support structure being a steel structure, assembling to obtain a photovoltaic panel structure module, and then installing a lifting rope on the support structure of each photovoltaic panel structure module;

[0009] Step B, fixing a precast pile in water according to design requirements;

[0010] Step C, using a land hoisting device and a lifting rope fixed connection, hoisting the photovoltaic panel structure module onto a transport ship, and stacking the photovoltaic panel structure module up and down;

[0011] Step D, the transport ship transports the photovoltaic panel structure module to the designated location;

[0012] Step E, using a hoisting ship and a lifting rope fixed connection, hoisting one photovoltaic panel structure module above the corresponding precast pile, adjusting the position of the photovoltaic panel structure module, then lowering the photovoltaic panel structure module and connecting it with the precast pile, and then fixing the photovoltaic panel structure module and the precast pile;

[0013] Step F, using the same method as step E, hoisting and installing the remaining photovoltaic panel structure modules until the water photovoltaic system of the designed shape and size is formed.

[0014] Further, in step A, the support structure includes a main beam, a purlin, and a purlin support. When installing the support structure, the purlin support is first welded to the main beam, and then the purlin is fixedly connected to the purlin support through bolts. Then, the photovoltaic panels are fixed at a set inclination angle on the purlin. In this step, the main beam is used as a force-bearing member, and multiple photovoltaic panels are installed on two main beams. One photovoltaic panel structure module is installed on four precast piles, which reduces the number of precast piles and the cost of pile driving. Moreover, the main beam, the purlin, and the purlin support are steel structures, which have small structural disturbance and uniform stress, so that the photovoltaic panels can be installed at a certain inclination interval to fully utilize the performance of the photovoltaic panels.

[0015] Further, two purlin supports are provided for each photovoltaic panel, and the two purlin supports installed on the same photovoltaic panel have a height difference, so that the photovoltaic panel is installed at an inclination. The number of purlin supports can be appropriately increased according to the size of the photovoltaic panel. In order to increase the strength of the purlin support, a reinforcing plate can be welded between the purlin support and the main beam.

[0016] Further, in the same photovoltaic panel structure module, a detachable support rod is arranged between the two main beams, so that the two main beams form an integral structure, facilitating the hoisting of the same photovoltaic panel structure module.

[0017] Further, in the process of installing the support rod, first, the connecting plate one is welded on the web of the main beam, then the connecting plate two is welded on the end of the support rod, and then the connecting plate two and the connecting plate one are fixed and connected by bolts, when step E is completed, the bolts between the connecting plate two and the connecting plate one are unscrewed, and the support rod is disassembled. The support rod is detachably connected to the main beam, and the support rod is timely installed or disassembled according to actual needs.

[0018] Further, the arrangement of the support rod is specifically designed: two parallel support rods one are arranged between the two main beams, the arrangement direction of the support rod one is perpendicular to the arrangement direction of the main beam, and the support rod one is used for bearing the horizontal force generated by the lifting rope during hoisting of the photovoltaic panel structure module, thereby avoiding bending and damage of the purlin and the photovoltaic panel due to the horizontal force. Meanwhile, two cross support rods two are arranged between the two main beams, and the two cross support rods two are arranged in the region between the two parallel support rods one, thereby preventing the structural shear deformation caused by the inclination of the photovoltaic structure module or uneven force of the lifting rope during hoisting.

[0019] Further, in step C, the support members are used to stack the photovoltaic panel structure modules up and down, the support member includes a column body and a corbel, the corbel is welded on the column body, and the corbel is provided with a positioning hole, at this time, a limiting piece is welded on the bottom of the main beam.

[0020] (1) When the photovoltaic panel structure modules are placed, a base is welded on the platform plate of the transport ship, then the column body is welded on the base, and then one of the photovoltaic panel structure modules is placed on the corbel, and the limiting piece at the bottom of the main beam is inserted into the positioning hole of the corbel;

[0021] (2) The next column body is prepared, the positioning piece at the bottom of the column body is fixed, the positioning piece of the upper column body is fixed to the lower column body, and then the other photovoltaic panel structure module is placed on the corbel of the upper column body, and the limiting piece at the bottom of the main beam is inserted into the positioning hole of the corbel;

[0022] (3) Repeat step (2) to stack the photovoltaic panel structure modules up and down.

[0023] In this step, the photovoltaic panel structure modules are stacked and placed on the transport ship, this component can avoid the photovoltaic panel structure modules stacked and placed from being pressed against each other, and the multi-layer stacking mode can improve the transportation efficiency. Moreover, the support member can be quickly installed or disassembled, and can be recycled.

[0024] Further, the positioning piece adopts a positioning column or a positioning sleeve: when the positioning piece adopts the positioning column, the positioning column of the upper column body is inserted into and limited in the through hole one of the lower column body. The upper column body is fixed to the lower column body, in this connection mode, the column bodies are firmly installed, at this time, a certain force needs to be applied to the upper column body to make the positioning column be arranged in the through hole one, and the column body is designed as a hollow component, thereby saving the amount of materials.

[0025] When the positioning member adopts the positioning sleeve, the positioning sleeve is provided with the through hole two, the through hole two of the positioning sleeve of the upper column body is sleeved on and limited on the top end of the lower column body, so that the upper column body is fixed on the lower column body, and the upper column body can be quickly connected or disassembled with the lower column body in the connecting mode, and the stacking speed of the photovoltaic panel structure module is improved.

[0026] Further, in step B, the embedded steel member is fixed on the precast pile, and the inclined support is welded on the embedded steel member, when the photovoltaic panel structure module is fixedly connected with the precast pile in step E, the main beam and the inclined support are welded and fixed, so that the main beam and the inclined support form a triangular stable structure, resist the overturning of the main beam, improve the stability of the main beam installed on the precast pile, and meet the construction of the large-span water photovoltaic system.

[0027] Further, the embedded steel ring is fixed on the top end of the precast pile, the embedded steel ring is provided with the mounting hole, when the photovoltaic panel structure module is placed down, the limiting member at the bottom of the main beam extends into the mounting hole, so that the photovoltaic panel structure module and the precast pile are butt jointed, and then the embedded steel ring and the main beam are welded and fixed, the firmness of the connection between the main beam and the precast pile is improved, the construction of the large-span water photovoltaic system is met, and finally the large-span water photovoltaic system with the designed shape and size is built.

[0028] The present application has the following beneficial effects due to the adoption of the above technical scheme:

[0029] The present application adopts a plurality of photovoltaic panels and support structures to form a photovoltaic panel structure module, which is divided into a plurality of identical modules to realize modular construction, the process can be assembled on land to ensure the installation quality of the photovoltaic panel structure module, the photovoltaic panel structure module can be integrally installed on water, the photovoltaic panel structure module and the precast pile are butt jointed and fixed by batch hoisting ship, and there is no need to separately lay photovoltaic panels on water, so that the installation efficiency is improved, and the construction quality and safety are ensured.

[0030] Moreover, the photovoltaic panel structure modules are transported in a large number to improve the transportation efficiency, and the structure of the photovoltaic panel structure modules is protected from being damaged due to movement.

[0031] In the later stage, the photovoltaic panel structure modules are transported to the designated position by the transport ship, the photovoltaic panel structure modules and the precast pile are butt jointed and fixed through hoisting and position adjustment of the photovoltaic panel structure modules, and the construction is completed. Modular assembly, hoisting, transportation and installation are realized, and finally the large-span water photovoltaic system with the designed shape and size is built. BRIEF DESCRIPTION OF DRAWINGS

[0032] The present application will be further described below in combination with the drawings:

[0033] Figure 1 Structure diagram of photovoltaic panel structure module in the present application;

[0034] Figure 2 Structure diagram of purlin in the present application;

[0035] Figure 3 Structure diagram of main beam in the present application;

[0036] Figure 4 Structure diagram of purlin support in the present application;

[0037] Figure 5 Structure diagram of photovoltaic panel structure module in the present application;

[0038] Figure 6 Structure diagram of connection between support rod and connecting plate in the present application;

[0039] Figure 7 Structure diagram of connection between main beam and connecting plate in the present application;

[0040] Figure 8 Structure diagram of positioning column of upper column body extending into and being limited in through hole one of lower column body in the present application;

[0041] Figure 9 Structure diagram of fixed connection between support member and base in the present application;

[0042] Figure 10 Structure diagram of fixed connection between support member and positioning column in the present application;

[0043] Figure 11 Structure diagram of positioning sleeve of upper column body sleeving and being limited on top end of lower column body in the present application;

[0044] Figure 12 Structure diagram of fixed connection between support member and positioning sleeve in the present application;

[0045] Figure 13 Structure diagram of photovoltaic panel structure module in the present application;

[0046] Figure 14 Structure diagram of prefabricated pile in the present application.

[0047] In the figure, 1-pv panel; 2-main beam; 3-purlin support; 4-purlin; 5-limiting piece; 6-stiffener; 7-hoisting rope; 8-supporting pole; 9-connection plate two; 10-connection plate one; 11-web; 12-flange; 13-column body; 14-corbel; 15-through hole one; 16-positioning hole; 17-base; 18-positioning sleeve; 19-through hole two; 20-precast pile; 21-pre-embedded steel member; 22-inclined support; 23-pre-embedded steel ring; 24-mounting hole; 25-positioning column; a-pv panel structure module. DETAILED DESCRIPTION

[0048] As shown in the figure, the construction method of the modular large-span waterborne photovoltaic system of the application comprises the following steps: Figures 1 to 14

[0049] Step A, fix a plurality of photovoltaic panels 1 at a set inclination angle on a supporting structure on land, the supporting structure is a steel structure, and a photovoltaic panel structure module a is assembled, and then a hoisting rope 7 is installed on the supporting structure of each photovoltaic panel structure module a.

[0050] The supporting structure is specifically designed in the application: the supporting structure comprises a main beam 2, a purlin 4 and a purlin support 3, the main beam 2 is an H-shaped steel, which comprises a web 11 and a flange 12 fixed to each other. When the supporting structure is installed, the purlin support 3 is welded on the main beam 2 first, then the purlin 4 is fixedly connected with the purlin support 3 through bolts, and then the photovoltaic panel 1 is fixed at a set inclination angle on the purlin 4. A connecting piece can be arranged at the bottom of the photovoltaic panel 1, and the connecting piece is fixedly connected with the purlin 4 through bolts. In this step, the main beam 2 is used as a force-bearing member, a plurality of photovoltaic panels 1 are installed on two main beams 2, and one photovoltaic panel structure module a is installed on four precast piles 20, so that the number of precast piles 20 can be reduced, and the piling cost can be reduced. Moreover, the main beam 2, the purlin 4 and the purlin support 3 are steel structures, the structural disturbance is small, the force is uniform, the photovoltaic panel 1 can be installed at a certain interval and inclination, and the performance of the photovoltaic panel 1 can be fully utilized. Hoisting points are arranged at the set positions of the first and last ends of each main beam 2, and the hoisting rope 7 is directly fixed at the hoisting points, so that the positive and negative bending moments of the structure are more uniformly distributed.

[0051] Two purlin supports 3 are arranged corresponding to each photovoltaic panel 1, and the two purlin supports 3 installed on the same photovoltaic panel 1 have a height difference, so that the photovoltaic panel 1 is installed at an inclination. The number of purlin supports 3 can be appropriately increased according to the size of the photovoltaic panel 1. In order to increase the strength of the purlin support 3, a stiffener 6 can be welded between the purlin support 3 and the main beam 2.

[0052] ​In the same photovoltaic panel structure module a, the detachable support rod 8 is arranged between the two main beams 2, so that the two main beams 2 form an integral structure, facilitating the lifting of the same photovoltaic panel structure module a. In the process of installing the support rod 8, the connecting plate one 10 is first welded on the web plate 11 of the main beam 2, then the connecting plate two 9 is welded on the end of the support rod 8, and then the connecting plate two 9 and the connecting plate one 10 are fixedly connected through bolts. The support rod 8 is detachably connected to the main beam 2, and the support rod 8 is timely installed or detached according to actual needs.

[0053] The present application specifically designs the arrangement of the support rod 8: two parallel support rods one are arranged between the two main beams 2, the arrangement direction of the support rod one is perpendicular to the arrangement direction of the main beam 2, and the support rod one is used to bear the horizontal force generated by the lifting rope 7 during lifting of the photovoltaic panel structure module a, so as to avoid the bending and damage of the purlin 4 and the photovoltaic panel 1 due to the horizontal force. Meanwhile, two cross support rods two are arranged between the two main beams 2, and the two cross support rods two are arranged in the region between the two parallel support rods one, so as to prevent the structural shear deformation caused by the inclination of the photovoltaic structure module or the uneven force of the lifting rope 7 during lifting.

[0054] Step B, the precast pile 20 is preformed by concrete, and a pre-embedded steel member 21 is fixed on the precast pile 20 during the forming process. The pre-embedded steel member 21 is firmly fixed on the precast pile 20 by using a sleeve, and an inclined support 22 is welded on the pre-embedded steel member 21. A pre-embedded steel ring 23 is fixed on the top end of the precast pile 20, and the pre-embedded steel ring 23 is provided with a mounting hole 24. According to design requirements, the precast pile 20 is fixed in water.

[0055] Step C, the photovoltaic panel structure module a is lifted and placed on the transport ship by using land lifting equipment and a lifting rope 7, and the photovoltaic panel structure modules a are stacked up and down.

[0056] The present application adopts support members to stack the photovoltaic panel structure modules a up and down, and the support members include a column body 13 and a corbel 14, the corbel 14 is welded on the column body 13, and the corbel 14 is provided with a positioning hole 16. At this time, a limiting piece 5 is welded on the bottom of the main beam 2.

[0057] (1) When the photovoltaic panel structure module a is placed, a base 17 is first welded on the platform plate of the transport ship, then the column body 13 is welded on the base 17, and then one photovoltaic panel structure module a is placed on the corbel 14, and the limiting piece 5 at the bottom of the main beam 2 extends into the positioning hole 16 of the corbel 14.

[0058] (2)Prepare the next column 13, the bottom of the column 13 fixed positioning member, and then the upper column 13 fixed to the lower column 13 positioning member, and then put another photovoltaic panel structure module a placed on the corbel 14 of the upper column 13, the main beam 2 bottom limit 5 into the positioning hole 16 of the corbel 14.

[0059] (3)Repeat step (2), photovoltaic panel structure module a stacked on top of each other.

[0060] In this step, the photovoltaic panel structure module a stacked on the transport ship, this component can avoid the stacked photovoltaic panel structure module a extrusion, multi-layer stacked mode can improve the transportation efficiency. Moreover, it is convenient to install or disassemble the support member quickly, which can be recycled.

[0061] Positioning member using positioning column 25 or positioning sleeve 18: when the positioning member uses the positioning column 25, the positioning column 25 of the upper column 13 is inserted into and limited in the through hole one 15 of the lower column 13. Make the upper column 13 fixed to the lower column 13, in this connection mode, the column 13 is installed firmly, at this time, a certain force needs to be applied to the upper column 13, so that the positioning column 25 is arranged in the through hole one 15, and the column 13 is designed as a hollow component, which saves the amount of material.

[0062] When the positioning member uses the positioning sleeve 18, the positioning sleeve 18 is provided with a through hole two 19, the through hole two 19 of the positioning sleeve 18 of the upper column 13 is sleeved and limited on the top end of the lower column 13. Make the upper column 13 fixed to the lower column 13, in this connection mode, the upper column 13 can be quickly connected or disassembled with the lower column 13, which improves the speed of stacking photovoltaic panel structure module a.

[0063] Step D, the transport ship transports the photovoltaic panel structure module a to the designated position.

[0064] Step E, through the hoisting ship and the hoisting rope 7 fixed connection, one of the photovoltaic panel structure module a is hoisted to the upper of the corresponding precast pile 20, and then the position of the photovoltaic panel structure module a is adjusted, and then the photovoltaic panel structure module a is put down, the limit 5 of the main beam 2 bottom is inserted into the installation hole 24, so that the photovoltaic panel structure module a and the precast pile 20 are connected, and then the pre-embedded steel ring 23 and the main beam 2 are welded and fixed, which improves the firmness of the connection between the main beam 2 and the precast pile 20, meets the construction of large-span water photovoltaic system. Then the main beam 2 and the inclined support 22 are welded and fixed, so that the main beam 2 and the inclined support 22 form a triangular stable structure, resist the overturning of the main beam 2, improve the stability of the main beam 2 installed on the precast pile 20, meet the construction of large-span water photovoltaic system. When step E is completed, the bolt between the connecting plate two 9 and the connecting plate one 10 is screwed out, the support rod 8 is disassembled, and the connecting plate one 10 can be cut at the same time.

[0065] Step F, using the same method as step E, hoist and install the remaining photovoltaic panel structure modules a until the designed shape and size of the water photovoltaic system is formed.

[0066] The above merely illustrates the specific embodiments of the present application, but the technical features of the present application are not limited thereto. Any simple change, equivalent replacement or modification made on the basis of the present application to solve the basically same technical problem and realize the basically same technical effect shall be covered within the protection scope of the present application.

Claims

1. Modular large-span overwater photovoltaic system construction method, characterized in that, It comprises the following steps: Step A, fixing photovoltaic panels on the support structure on land at a set inclination angle, the support structure is a steel structure, assembling to obtain a photovoltaic panel structure module, and then installing a sling on the support structure of each photovoltaic panel structure module; Step B, fixing precast piles in water according to design requirements; Step C, using land hoisting equipment and sling fixed connection to hoist and place the photovoltaic panel structure module on the transport ship, and then stacking the photovoltaic panel structure module up and down; Step D, transporting the photovoltaic panel structure module to the designated position by the transport ship; Step E, using the hoisting ship and the sling fixed connection to hoist one photovoltaic panel structure module to the upper part of the corresponding precast pile, adjusting the position of the photovoltaic panel structure module, then placing the photovoltaic panel structure module and connecting it with the precast pile; Step F, using the same method as step E to hoist and install the remaining photovoltaic panel structure modules until the water photovoltaic system of the designed shape and size is formed.

2. The modular long-span overwater PV system construction method according to claim 1, characterized in that: In step A, the support structure comprises a main beam, a purlin and a purlin support, when installing the support structure, the purlin support is welded on the main beam, then the purlin is fixed and connected with the purlin support through bolts, and then the photovoltaic panel is fixed on the purlin at a set inclination angle.

3. The modular long-span overwater PV system construction method according to claim 2, characterized in that: Two purlin supports are arranged on each photovoltaic panel, and the two purlin supports arranged on the same photovoltaic panel have a height difference, so that the photovoltaic panel is installed in an inclined manner.

4. The modular long-span overwater PV system construction method of claim 2, wherein: In the same photovoltaic panel structure module, a detachable support rod is arranged between the two main beams.

5. The modular long-span overwater PV system construction method according to claim 4, characterized in that: In the process of installing the support rod, first, a connecting plate one is welded on the web of the main beam, then a connecting plate two is welded on the end of the support rod, and then the connecting plate two and the connecting plate one are fixed and connected through bolts, when step E is completed, the bolts between the connecting plate two and the connecting plate one are unscrewed, and the support rod is removed.

6. The modular long-span overwater PV system construction method of claim 4, wherein: Two parallel support rods one are arranged between the two main beams, and the arrangement direction of the support rod one is perpendicular to the arrangement direction of the main beam, and two intersecting support rods two are arranged between the two main beams, and the two intersecting support rods two are arranged in the area between the two parallel support rods one.

7. The modular long-span overwater PV system construction method of claim 2, wherein: In step C, the photovoltaic panel structure module is stacked up and down by using a support member, the support member comprises a column body and a corbel, the corbel is welded on the column body, and the corbel is provided with a positioning hole, and at this time, a limiting piece is welded on the bottom of the main beam; (1) when the photovoltaic panel structure module is placed, first, a base is welded on the platform plate of the transport ship, then the column body is welded on the base, then one photovoltaic panel structure module is placed on the corbel, and the limiting piece at the bottom of the main beam is inserted into the positioning hole of the corbel; (2) preparing another column body, fixing a limiting piece at the bottom of the column body, fixing the limiting piece of the upper column body on the lower column body, then placing another photovoltaic panel structure module on the corbel of the upper column body, and the limiting piece at the bottom of the main beam is inserted into the positioning hole of the corbel; (3) repeating step (2) to stack the photovoltaic panel structure module up and down.

8. The modular long-span overwater PV system construction method of claim 7, wherein: The limiting piece is a positioning column or a positioning sleeve; When the limiting piece is a positioning column, the positioning column of the upper column body is inserted into and limited in the through hole one of the lower column body. When the positioning member is a positioning sleeve, the positioning sleeve is provided with a through hole two, and the through hole two of the positioning sleeve of the upper column body is sleeved on and limited on the top end of the lower column body.

9. The modular long-span overwater PV system construction method of claim 7, wherein: In step B, the embedded steel member is fixed on the precast pile, and the inclined support is welded on the embedded steel member. When the photovoltaic panel structure module is fixedly connected with the precast pile in step E, the main beam and the inclined support are welded and fixed.

10. The modular long-span overwater PV system construction method of claim 9, wherein: The embedded steel ring is fixed on the top end of the precast pile, and the embedded steel ring is provided with a mounting hole. When the photovoltaic panel structure module is lowered, the limiting member at the bottom of the main beam is inserted into the mounting hole, so that the photovoltaic panel structure module and the precast pile are docked, and then the embedded steel ring and the main beam are welded and fixed.

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