Installation structure suitable for centralized arrangement of mountainous region string inverters

Abstract

The utility model relates to the technical field of mountain photovoltaic power generation engineering construction, in particular to an installation structure suitable for centralized arrangement of a mountain string inverter. The installation structure comprises a steel pipe pile foundation and an installation support fixedly installed on the steel pipe pile foundation, the steel pipe pile foundation comprises a concrete foundation at the bottom, the lower end of the concrete foundation is used for being buried underground, a steel pipe is buried in the concrete foundation in the vertical direction, and the installation support is fixedly installed on the steel pipe. And a plurality of string inverter mounting positions are arranged on the mounting bracket. By arranging the plurality of string inverter mounting positions on the mounting bracket, the plurality of string inverters can be intensively arranged on the mounting bracket, so that on one hand, actual mounting and later maintenance are facilitated, and on the other hand, during actual mounting, the whole string inverters can be arranged close to the alternating current input device through the mounting structure; therefore, the number of alternating-current cables of each group of inverter string is reduced, the total number of alternating-current cables is reduced, and resources are saved.

Description

Technical Field

[0001] The utility model relates to the technical field of mountain photovoltaic power generation engineering construction, and in particular to an installation structure suitable for centralized arrangement of mountain string inverters. Background Art

[0002] The main function of the photovoltaic grid-connected inverter is to convert the direct current generated by the photovoltaic modules into alternating current that meets the requirements of the power grid. It is the core component in the photovoltaic system.

[0003] String inverters can track the maximum power point of one or more strings of photovoltaic modules individually, and have advantages in terms of failure rate, system safety, and operation and maintenance costs. They have better system reliability and can ensure the long-term safe and reliable operation of power stations. Therefore, in mountain photovoltaic power generation projects, string inverters are usually used as photovoltaic grid-connected inverters. During actual installation, string inverters are generally installed near the bottom of a certain string and are directly fixed to the fixed columns of photovoltaic modules using clamps or other methods.

[0004] However, in mountain photovoltaic power generation projects, the terrain slopes at different locations vary greatly and the ground is uneven. Therefore, the positions of each string of photovoltaic modules will be scattered at different positions according to the actual terrain. The installation method of traditional string inverters will cause the string inverters to be arranged in a decentralized manner, which may be far apart from each other, resulting in increased difficulty in actual installation and operation and maintenance. At the same time, when connecting the AC cable to the AC end of the string inverter, the decentralized arrangement of the string inverters will result in a large total AC cable usage.

[0005] Therefore, how to reduce the installation and maintenance difficulty of string inverters in mountain photovoltaic power generation projects and save the amount of AC cables is a technical problem that technical personnel in this field need to solve urgently. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide an installation structure suitable for centralized arrangement of mountain string inverters, including a steel pipe pile foundation and a mounting bracket fixedly installed on the steel pipe pile foundation, the steel pipe pile foundation including a concrete foundation at the bottom, the lower end of the concrete foundation is used to be buried deep underground, a steel pipe is vertically buried in the concrete foundation, the mounting bracket is fixedly installed on the steel pipe, and a plurality of string inverter mounting positions are arranged on the mounting bracket.

[0007] Furthermore, the mounting bracket is a square frame consisting of two supporting cross beams and two supporting longitudinal beams, a plurality of string inverter mounting positions are arranged at lateral intervals on the supporting cross beams, an intelligent communication cabinet mounting position is arranged on the supporting longitudinal beams, and a steel pipe pile foundation is fixedly provided at each of the four corners of the square frame.

[0008] Furthermore, a plurality of steel pipe pile foundations are arranged laterally at equal intervals on the upper side of the support beam, two string inverter installation positions are arranged between two laterally adjacent steel pipe pile foundations, and a support longitudinal beam is fixedly arranged between two vertically opposite steel pipe pile foundations.

[0009] Furthermore, the mounting bracket is fixedly mounted on the steel pipe pile foundation via a fixing structure.

[0010] Furthermore, the fixing structure includes U-shaped bolts and fixing nuts, and the supporting cross beam and the supporting longitudinal beam are fixed to the corresponding steel pipe pile foundation through the U-shaped bolts and fixing nuts.

[0011] Furthermore, the supporting cross beam and the supporting longitudinal beam are both C-shaped channel steels.

[0012] Furthermore, two mounting brackets are arranged at intervals in the vertical direction, and the distance between the two mounting brackets is used to match the vertical height of the string inverter.

[0013] Furthermore, the lower end of the steel pipe is flush with the lower end of the concrete foundation, and the upper end of the concrete foundation is exposed to the ground.

[0014] Furthermore, the steel pipe includes an exposed section and a ground-inserted section from top to bottom, the exposed section is used to be exposed on the ground, and the ratio of the exposed section to the ground-inserted section is 1:1.

[0015] Furthermore, the steel pipe is poured with internal concrete.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] (1) Multiple string inverter installation positions are set on the installation bracket, and multiple string inverters can be concentrated on the installation bracket. On the one hand, it is convenient for actual installation and subsequent maintenance. On the other hand, during actual installation, each string inverter can be arranged close to the AC input device through the installation structure, thereby reducing the amount of AC cables for each string inverter, reducing the total amount of AC cables, and saving resources. The steel pipe pile foundation includes a concrete foundation and a steel pipe. The steel pipe is buried in the concrete foundation. The concrete foundation can be used to increase the contact area with the ground, and the concrete foundation can be used to increase the stability with the ground, thereby improving the support stability of the steel pipe pile foundation.

[0018] (2) The mounting bracket is a square frame. On the one hand, the supporting longitudinal beams and supporting cross beams of the square bracket block each other, which can improve the stability of the mounting bracket. On the other hand, the number of string inverter installation points can be increased. The installation position of the intelligent communication cabinet is set on the supporting longitudinal beam, and the intelligent communication cabinet can be integrated on the mounting structure to improve the integration and facilitate the monitoring and communication of the intelligent communication cabinet.

[0019] (3) A plurality of steel pipe pile foundations are arranged at equal intervals along the horizontal direction of the supporting cross beam, and a supporting longitudinal beam is fixedly installed between two vertically opposite steel pipe pile foundations to improve stability.

[0020] (4) Two mounting brackets are arranged at intervals along the vertical direction. The spacing between the two mounting brackets is used to adapt to the vertical height of the string inverter. On the one hand, it can improve the stability of the mounting structure, and on the other hand, it is convenient to reliably install the string inverter. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the installation structure in Example 1 of the utility model.

[0022] Figure 2 It is a front view of the mounting bracket and the steel pipe pile foundation in Example 1 of the utility model.

[0023] Figure 3 It is a side view of the mounting bracket and the steel pipe pile foundation in Example 1 of the utility model.

[0024] Figure 4 It is a structural schematic diagram of the U-bolt in Example 1 of the utility model.

[0025] Figure 5 It is a schematic diagram of the installation of the supporting beam and the steel pipe pile foundation in Example 1 of the utility model.

[0026] Figure 6 It is a schematic diagram of the installation of the supporting beam, steel pipe pile foundation and string inverter in Example 1 of the utility model.

[0027] Figure 7 It is a cross-sectional view of the steel pipe pile foundation in Example 1 of the utility model.

[0028] In the figure: 1. Steel pipe pile foundation; 11. Concrete foundation; 12. Steel pipe; 121. Exposed section; 122. Ground-inserted section; 13. Injected concrete; 2. Mounting bracket; 21. Supporting crossbeam; 22. Supporting longitudinal beam; 23. String inverter installation position; 24. Intelligent communication cabinet installation position; 25. Inverter installation hole; 26. Communication cabinet installation hole; 27. Fixing hole; 28. U-bolt; 3. String inverter; 4. Intelligent communication cabinet; S. Ground. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application: Specific embodiment 1:

[0031] refer to Figures 1 to 7The utility model discloses an installation structure suitable for centralized arrangement of mountain string inverters (hereinafter referred to as the installation structure), comprising a steel pipe pile foundation 1 and an installation bracket 2 fixedly installed on the steel pipe pile foundation 1, wherein the steel pipe pile foundation 1 comprises a concrete foundation 11 at the bottom, wherein the lower end of the concrete foundation 11 is used to be buried deep underground, wherein a steel pipe 12 is vertically buried in the concrete foundation 11, wherein the installation bracket is fixedly installed on the steel pipe 12, and wherein a plurality of string inverter installation positions 23 are arranged on the installation bracket.

[0032] Specifically, Figure 7 As shown, in this embodiment, the steel pipe 12 includes an exposed section 121 and a ground-inserted section 122 from top to bottom, and the exposed section 121 is used to be exposed from the ground S. Preferably, the ratio of the exposed section 121 to the ground-inserted section 122 is 1:1, the lower end of the steel pipe 12 is flush with the lower end of the concrete foundation 11, and the upper end of the concrete foundation 11 is used to be exposed from the ground S, that is, in this embodiment, the concrete foundation 11 completely wraps the ground-inserted section 122 and a part of the exposed section 121, and the concrete foundation 11 is used to ensure the stability of the steel pipe 12.

[0033] Preferably, Figure 7 As shown, in this embodiment, internally-injected concrete 13 is poured into the steel pipe 12, and the height of the internally-injected concrete 13 is lower than the ground S, thereby improving the stability of the steel pipe pile foundation 1 and ensuring that the bearing capacity of the steel pipe pile foundation 1 meets the design requirements.

[0034] In this embodiment, if Figure 1 , 2 As shown in Figure 3, the mounting bracket 2 is a square frame consisting of two supporting crossbeams 21 and two supporting longitudinal beams 22. A plurality of string inverter mounting positions 23 are arranged at intervals along the horizontal direction on the supporting crossbeams 21, and a smart communication cabinet mounting position 24 is arranged on the supporting longitudinal beams 22. A steel pipe pile foundation 1 is fixedly arranged at each of the four corners of the square frame. In this way, the mounting bracket 2 is a square frame. On the one hand, the supporting longitudinal beams 22 and the supporting crossbeams of the square bracket block each other, which can improve the stability of the mounting bracket 2. On the other hand, the number of the string inverter mounting positions 23 can be increased. The smart communication cabinet mounting position 24 is arranged on the supporting longitudinal beams 22, and the smart communication cabinet 4 can be integrated and installed on the mounting structure to improve the integration and facilitate the monitoring and communication of the smart communication cabinet 4. Preferably, as Figure 2 , 3 As shown, in this embodiment, two mounting brackets 2 are arranged at intervals in the vertical direction, and the spacing between the two mounting brackets 2 is adapted to the vertical height of the string inverter 3. This can improve the stability of the mounting structure on the one hand, and facilitate the reliable installation of the string inverter 3 on the other hand.

[0035] When the number of actual string inverters 3 is large, the length of the support beam 21 is long. Therefore, in order to improve the stability of the support beam 21, preferably, in this embodiment, Figure 1 As shown, a plurality of steel pipe pile foundations 1 are arranged at equal intervals in the horizontal direction on the supporting crossbeam 21, two string inverter installation positions 23 are arranged between two laterally adjacent steel pipe pile foundations 1, and a supporting longitudinal beam 22 is fixedly arranged between two vertically opposite steel pipe pile foundations 1.

[0036] Such settings, such as Figure 1 , 2 As shown in Figure 3, the steel pipe pile foundation 1 is arranged at intervals in the horizontal direction, and the support beams 21 are divided into different installation areas at equal intervals, and only two string inverter installation positions 23 need to be arranged in each installation area to ensure that the entire support beam 21 is evenly stressed and the stress is evenly transmitted to the steel pipe pile foundation 1. A support longitudinal beam 22 is arranged between the two opposite support beams 21, and the support longitudinal beam 22 cooperates with the support beam 21 to limit the displacement of the steel pipe pile foundation 1 and improve the stability of the installation structure.

[0037] In this embodiment, if Figure 2 As shown, four inverter mounting holes 25 are respectively arranged on the two supporting beams 21 between adjacent steel pipe pile foundations 1 along the lateral sides. The four inverter mounting holes 25 are surrounded by a rectangle, and the rectangle corresponds to the mounting holes on the string inverter 3. The area surrounded by the four inverter mounting holes 25 is the string inverter mounting position 23. Each string inverter 3 is fixedly mounted on the corresponding string inverter mounting position 23 by four fixing bolts.

[0038] like Figure 3 As shown, four communication cabinet mounting holes 26 are provided on the two supporting longitudinal beams 22, and the positions of the four communication cabinet mounting holes 26 correspond one-to-one to the mounting holes on the back of the intelligent communication cabinet 4. The area surrounded by the four communication cabinet mounting holes 26 constitutes the intelligent communication cabinet mounting position 24, so that the intelligent communication cabinet 4 is fixedly installed on the intelligent communication cabinet mounting position 24 by four fixing bolts.

[0039] In this embodiment, if Figure 2 , 3 As shown, the supporting cross beam 21 and the supporting longitudinal beam 22 are both C-shaped channel steels, and the C-shaped channel steels are 6.3# channel steels made of Q355B.

[0040] Specifically, the notches of the two supporting longitudinal beams 22 facing each other in the transverse direction are arranged relative to each other, and the notches of the two supporting crossbeams 21 facing each other in the longitudinal direction are arranged relative to each other, so that the notches can be arranged toward the inner side of the square frame. In this way, during actual installation, the side of the C-shaped channel steel facing away from the notch is used for fixed connection with the steel pipe 12, and the string inverter 3 and the intelligent communication cabinet 4 can be respectively arranged on one side of the plane of the supporting crossbeam 21 and the supporting longitudinal beam 22 facing away from the notch. Of course, in other embodiments, the supporting crossbeam 21 and the supporting longitudinal beam 22 can also be square steel, and the material thereof can also be selected according to the actual connection and stress requirements, which is not limited here.

[0041] In this embodiment, the mounting bracket 2 is fixedly mounted on the steel pipe pile foundation 1 through a fixing structure. Figure 3 , 4 As shown in FIG. 5 , the fixing structure includes a U-shaped bolt 28 and a fixing nut (not shown in the figure), and the material of the U-shaped bolt 28 is Q235B. The supporting cross beam 21 and the supporting longitudinal beam 22 are fixed to the corresponding steel pipe 12 through the U-shaped bolt 28 and the fixing nut.

[0042] Specifically, Figure 2 , 3 As shown, the support cross beam 21 has two fixing holes 27 symmetrically formed on both sides of the corresponding steel pipe 12, and the two ends of the U-shaped bolt 28 are respectively passed through the two fixing holes 27 to hold the support cross beam 21 tightly and fix it on the steel pipe 12. Similarly, the support longitudinal beam 22 has two fixing holes 27 symmetrically formed on both sides of the corresponding steel pipe 12, and the two ends of the U-shaped bolt 28 are respectively passed through the two fixing holes 27 to hold the support longitudinal beam 22 tightly and fix it on the steel pipe 12.

[0043] Of course, in other embodiments, when the actual use requirements are met, the square frame can also be fixedly installed on the steel pipe pile foundation 1 by rod-shaped bolts. In this case, a through hole is opened at the position of the steel pipe 12 corresponding to the support beam 21, and a mounting and fixing hole is opened at the position corresponding to the corresponding through hole on the support beam 21. The rod-shaped bolt passes through the mounting and fixing hole and the through hole to fix the support beam 21 on the steel pipe 12. Similarly, the installation method of fixing the support longitudinal beam 22 on the steel pipe 12 by rod-shaped bolts is the same, which will not be repeated here. Or in other embodiments, no fixing structure may be provided, and the mounting bracket is fixed to the steel pipe 12 by welding.

[0044] In this embodiment, the specifications of the steel pipe 12 are: diameter 60mm, wall thickness 3mm, length 3000mm, material is Q355B, and the steel pipe pile foundation 1 adopts a pre-buried steel pipe 12 insertion design.

[0045] The installation process of the installation structure of the utility model is:

[0046] When implementing a photovoltaic project, the installation structure dimensions are determined based on the local mountain slope and mountain geological conditions, combined with the project master plan layout parameters and the number of strings.

[0047] During construction, the steel pipe pile foundation 1 adopts an embedded round steel pipe 12 insertion design. The top surface of the concrete foundation 11 is exposed to a certain height from the ground S. The embedded round steel pipe 12 can be conveniently connected to the upper structure through a fixed structure, and then the internal concrete 13 is poured into the steel pipe 12 to ensure that the pile spacing, pile top elevation and pile foundation bearing capacity meet the design requirements.

[0048] After the steel pipe pile foundation 1 reaches the design strength, the upper mounting bracket 2 is installed. The supporting cross beam 21 and the supporting longitudinal beam 22 are assembled into a stable frame structure using their respective fixed structures according to the diagram. After the installation of the centralized supporting structure is completed, the installation of the string inverter 3 and the intelligent communication cabinet 4 can be carried out.

[0049] In summary, the installation structure of the utility model can centrally arrange multiple string inverters 3 on the installation bracket 2 by setting multiple string inverter installation positions 23 on the installation bracket 2. On the one hand, it is convenient for actual installation and later maintenance. On the other hand, during actual installation, each string inverter 3 can be arranged as a whole close to the AC input device through the installation structure, thereby reducing the amount of AC cables of each string inverter 3, reducing the total amount of AC cables, and saving resources. The steel pipe pile foundation 1 includes a concrete foundation 11 and a steel pipe 12. The steel pipe 12 is buried in the concrete foundation 11. The concrete foundation 11 can be used to increase the contact area with the ground S, and the concrete foundation 11 can be used to increase the stability with the ground S, thereby improving the support stability of the steel pipe pile foundation 1.

[0050] Embodiment 2: This embodiment provides a different installation bracket. Different from Embodiment 1, in this embodiment, according to actual installation requirements, the installation bracket can be a triangular frame structure, and a steel pipe pile foundation is set at each triangle of the triangular frame.

[0051] Embodiment 3, this embodiment provides a different mounting bracket. In this embodiment, when the number of string inverters is large, to meet actual needs, the supporting beam can be designed in sections, and two string inverter mounting positions are arranged at lateral intervals on each section of the supporting beam.

[0052] Embodiment 4: This embodiment provides a different installation structure. In this embodiment, when meeting actual needs, only one installation bracket may be provided in the longitudinal direction.

[0053] Embodiment 5: This embodiment provides a different steel pipe pile foundation. In this embodiment, the ratio of the inserted section to the exposed section can be set according to actual use requirements, such as 2:1, 1:2, 2:3, etc.

[0054] Example 6: This example provides a different steel pipe pile foundation. In this example, when actual use requirements are met, the upper end of the concrete foundation can be buried underground.

[0055] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

[0056] In the description of the embodiments of the present application, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the invented product is usually placed when used. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0057] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

Claims

1. An installation structure suitable for centralized arrangement of mountain string inverters, characterized in that: It includes a steel pipe pile foundation and a mounting bracket fixedly installed on the steel pipe pile foundation. The steel pipe pile foundation includes a concrete foundation at the bottom. The lower end of the concrete foundation is used to be buried deep underground. A steel pipe is buried vertically in the concrete foundation. The mounting bracket is fixedly installed on the steel pipe. A plurality of string inverter mounting positions are arranged on the mounting bracket.

2. The installation structure suitable for centralized arrangement of mountain string inverters according to claim 1, characterized in that: The mounting bracket is a square frame consisting of two supporting crossbeams and two supporting longitudinal beams, a plurality of string inverter mounting positions are arranged at lateral intervals on the supporting crossbeams, an intelligent communication cabinet mounting position is arranged on the supporting longitudinal beams, and a steel pipe pile foundation is fixedly provided at each of the four corners of the square frame.

3. The installation structure suitable for centralized arrangement of mountain string inverters according to claim 2, characterized in that: A plurality of steel pipe pile foundations are arranged at equal intervals laterally along the support crossbeam, two string inverter installation positions are arranged between two laterally adjacent steel pipe pile foundations, and a support longitudinal beam is fixedly arranged between two vertically opposite steel pipe pile foundations.

4. The installation structure suitable for centralized arrangement of mountain string inverters according to claim 2, characterized in that: The mounting bracket is fixedly mounted on the steel pipe pile foundation via a fixing structure.

5. The installation structure suitable for centralized arrangement of mountain string inverters according to claim 4, characterized in that: The fixing structure includes a U-shaped bolt and a fixing nut, and the supporting cross beam and the supporting longitudinal beam are fixed on the corresponding steel pipe pile foundation through the U-shaped bolt and the fixing nut.

6. The installation structure suitable for centralized arrangement of mountain string inverters according to claim 5, characterized in that: The supporting cross beam and the supporting longitudinal beam are both C-shaped channel steels.

7. The installation structure suitable for centralized arrangement of mountain string inverters according to claim 1, characterized in that: Two mounting brackets are arranged vertically at intervals, and the distance between the two mounting brackets is used to adapt to the vertical height of the string inverter.

8. The installation structure suitable for centralized arrangement of mountain string inverters according to claim 1, characterized in that: The lower end of the steel pipe is flush with the lower end of the concrete foundation, and the upper end of the concrete foundation is used to be exposed to the ground.

9. The installation structure suitable for centralized arrangement of mountain string inverters according to claim 8, characterized in that: The steel pipe includes an exposed section and a ground-inserted section from top to bottom, the exposed section is used to be exposed from the ground, and the ratio of the exposed section to the ground-inserted section is 1:

1.

10. The installation structure suitable for centralized arrangement of mountain string inverters according to claim 9, characterized in that: Injected concrete is poured into the steel pipe.

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