A modular pergola design method and a photovoltaic pergola

Abstract

The present invention discloses a modular pergola design method and a photovoltaic pergola. The pergola is used to support a plurality of plates arranged in a matrix, and includes the following steps: S1: equally divide the length or width of the plate according to a preset number of equal parts to obtain an equal division size, and obtain a value coefficient according to the local environmental parameters and the equal division size; S2: calculate the length of the standard purlin, the length of the cantilever purlin, and the length of the supplementary purlin respectively according to the value coefficient and the equal division size; S3: obtain at least one combination mode of the standard purlin, the cantilever purlin, and the supplementary purlin according to the number of columns of the plurality of plates arranged in a matrix, and form the cross beam of the pergola by combining the standard purlin, the cantilever purlin, and the supplementary purlin. The modular pergola design method provided by the present invention adopts the modular design concept, and performs modular design on the purlins based on the length or width of the plate. While having high flexibility, it realizes a certain number of combination selections, and can reduce the pergola design cost.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic power generation, and particularly to a modular shed frame design method and a photovoltaic shed frame. Background Art

[0002] With the development of photovoltaic technology, household photovoltaic power generation has been popularized. Household photovoltaic power generation requires arranging solar panels on the roof, wall or ground in the courtyard of a house. The electricity generated can be used by the household itself or sold to the power grid to increase income. Building-integrated photovoltaics (i.e., BIPV) is a technology that integrates solar power generation products into buildings. In a region, the BIPV business of household photovoltaic power generation is characterized by small scale, large quantity and strong individuality. This results in high requirements for BIPV design and assembly module supply in household photovoltaic power generation. The BIPV design should not only meet the design requirements of the photovoltaic shed frame for the regional environment, but also meet the site requirements for arranging photovoltaic products for each household. The current photovoltaic shed frame design adopts a separate design method for each small project of household photovoltaic power generation in the region, which leads to too long time-consuming for photovoltaic shed frame design, and the construction dimensions of each small project are irregular, resulting in a huge workload in the process of converting to processing drawings, a high error rate in the production of BIPV assembly modules, reducing the promotion and layout progress of household photovoltaic power generation, and increasing the promotion and layout cost of household photovoltaic power generation. Summary of the Invention

[0003] The technical problem to be solved by the present invention is: to provide a modular shed frame design method and a photovoltaic shed frame to solve the problems of difficult design and high cost of existing BIPV modules.

[0004] To solve the above technical problem, the technical solution adopted by the present invention is: a modular shed frame design method, the shed frame is used to support a plurality of plates arranged in a matrix, including the following steps:

[0005] S1: Divide the length or width of the plate according to a preset equal division number to obtain an equal division size, and obtain a value coefficient according to the local environmental parameters and the equal division size;

[0006] S2: Calculate the length of the standard purlin, the length of the cantilever purlin and the length of the supplementary purlin respectively according to the value coefficient and the equal division size;

[0007] S3: Obtain at least one combination mode of the standard purlin, the cantilever purlin and the supplementary purlin according to the number of columns of the plurality of plates arranged in a matrix, and form the cross beam of the shed frame by combining the standard purlin, the cantilever purlin and the supplementary purlin.

[0008] Further, in the step S1, the length or width of the plate body is equally divided to obtain an equal division dimension, and a value-taking coefficient is obtained according to the local environmental parameters and the equal division dimension, including the steps of:

[0009] S11. Determine a preset number of equal division parts, and equally divide the length or width of the plate body according to the preset number of equal division parts to obtain the equal division dimension;

[0010] S12. Calculate the maximum simply supported span of the purlin according to the local environmental parameters, the allowable strength of the purlin and the allowable deflection of the purlin;

[0011] S13. Calculate the value-taking coefficient according to the maximum simply supported span of the purlin and the equal division dimension; wherein, the value-taking coefficient is an integer.

[0012] Further, in the step S13, calculating the value-taking coefficient according to the maximum simply supported span of the purlin and the equal division dimension includes:

[0013] Calculate the value-taking coefficient according to the following formula:

[0014]

[0015] wherein, a is the value-taking coefficient, is the maximum simply supported span of the purlin, is the equal division dimension, is the length or width of the plate body, n is the preset number of equal division parts, and Int is the rounding function.

[0016] Further, the environmental parameters include: local wind pressure, local snow pressure, and maximum allowable height of the shed.

[0017] Further, in the step S2, calculating the lengths of the standard purlin, the cantilever purlin and the supplementary purlin according to the value-taking coefficient and the equal division dimension includes:

[0018] Calculate the lengths of the standard purlin, the cantilever purlin and the supplementary purlin respectively according to the following formula:

[0019]

[0020] wherein, L 1 is the length of the standard purlin, a is the value-taking coefficient, is the equal division dimension, is the length or width of the plate body, n is the preset number of equal division parts, is the length of the cantilever purlin, b is the first integer preset value, is the length of the supplementary purlin, c is the second integer preset value.

[0021] Further, the cross beam includes an intermediate part and a cantilever part. The intermediate part includes the standard purlin and / or the supplementary purlin, and the cantilever part is the standard purlin, the cantilever purlin or the supplementary purlin.

[0022] Further, the connection position between the purlin of the cantilever part and the side column of the pergola can be adjusted within a preset adjustment range.

[0023] Further, it further includes step S4: Select one of the combination methods of the standard purlin, the cantilever purlin and the supplementary purlin as the cross beam assembly, and design the inclined beam and the column of the pergola according to the obstacle situation of the installation site of the cross beam assembly and the pergola.

[0024] Another object of the present invention is to provide a photovoltaic pergola designed according to the above modular pergola design method. The photovoltaic pergola is used to support a plurality of photovoltaic panels arranged in a matrix, and includes a plurality of inclined beams, a plurality of columns and a plurality of cross beams. The inclined beams are arranged on the columns, and the cross beams are arranged on the inclined beams. The cross beam includes at least one of a standard purlin, a cantilever purlin and a supplementary purlin.

[0025] Further, the cross beam includes an intermediate part and a cantilever part. The intermediate part includes the standard purlin and / or the supplementary purlin, and the cantilever part is the standard purlin, the cantilever purlin or the supplementary purlin.

[0026] The beneficial effects of the present invention are as follows: The modular pergola design method provided by the present invention adopts the modular design concept, performs modular design on the purlins based on the length or width of the plate body to obtain three types of purlins: standard purlins, cantilever purlins and supplementary purlins, and forms the cross beam of the pergola by the combination of the three types of purlins. This method can realize the modular design of the purlins of the pergola. While having high flexibility, it realizes a certain number of combination selections. By setting the three types of purlins, it can meet the personalized construction requirements of pergolas for plate bodies with the same width size or length size within a single region. Its application in building a photovoltaic pergola can reduce the modular design difficulty of the photovoltaic pergola, improve the design efficiency of the photovoltaic pergola, simplify the structural complexity of the photovoltaic pergola, reduce the processing cost of the cross beam and purlin of the photovoltaic pergola, and at the same time reduce the processing error rate of the cross beam and purlin of the photovoltaic pergola. Description of the Drawings

[0027] Figure 1 is the step flow chart of the modular pergola design method of the present invention;

[0028] Figure 2 is the structural schematic diagram of the photovoltaic pergola of the present invention in one embodiment;

[0029] Figure 3Schematically shows the standard purlin, cantilever purlin and supplementary purlin of the present invention; wherein, Figure 3 (a) Schematically shows the standard purlin of the present invention, Figure 3 (b) Schematically shows the cantilever purlin of the present invention, Figure 3 (c) Schematically shows the supplementary purlin of the present invention;

[0030] Figure 4 Schematically shows the structural diagram of the cantilever part of the cross beam of the present invention;

[0031] Figure 5 Schematically shows the structural diagram of the photovoltaic panel array and the cross beam; wherein, Figure 5 (a) Schematically shows the structural diagram of the photovoltaic panel array arranged flush with the edge cross beam, Figure 5 (b) Schematically shows the structural diagram of the photovoltaic panel array cantilevered relative to the cross beam;

[0032] Figure 6 Schematically shows the structural diagram of the cross beam assembly composed of three different combination methods when the number of columns N of the photovoltaic panel array is 5.

[0033] Label description:

[0034] 1. Standard purlin; 2. Cantilever purlin; 21. Column spacing section; 22. Cantilever section; 3. Supplementary purlin; 4. Cross beam; 41. Middle part; 42. Cantilever part; 5. Support column; 6. Diagonal beam; 7. Middle column; 8. Side column; 9. Photovoltaic panel array. Specific implementation manner

[0035] To describe in detail the technical content, achieved purpose and effect of the present invention, the following is described in conjunction with the implementation manners and with reference to the drawings.

[0036] Please refer to Figures 1 to 6 , a modular pergola design method, the pergola is used to support a plurality of plates arranged in a matrix, and includes the following steps:

[0037] S1: Divide the length or width of the plate according to a preset number of equal parts to obtain an equal division size, and obtain a value coefficient according to the local environmental parameters and the equal division size;

[0038] S2: Calculate the length of the standard purlin, the length of the cantilever purlin and the length of the supplementary purlin respectively according to the value coefficient and the equal division size;

[0039] S3: Obtain at least one combination method of the standard purlin, the cantilever purlin and the supplementary purlin according to the number of columns of the plurality of plates arranged in a matrix, and form the cross beam of the pergola by combining the standard purlin, the cantilever purlin and the supplementary purlin.

[0040] As can be seen from the above description, the beneficial effects of the present invention are as follows: The modular pergola design method provided by the present invention adopts the modular design concept, and modularly designs the length of the purlins based on the size of the plate body to obtain purlins with three length dimensions: standard purlins, cantilever purlins, and supplementary purlins. And the combination of the three purlins forms the cross beam of the pergola. This method can realize the modular design of the purlins of the pergola. While having high flexibility, it realizes a certain number of combination selections. By setting the three purlins, it can meet the personalized construction requirements of pergolas for plate bodies with the same width dimension or length dimension within a single region. Its application in building a photovoltaic pergola can reduce the modular design difficulty of the photovoltaic pergola, improve the design efficiency of the photovoltaic pergola, simplify the structural complexity of the photovoltaic pergola, reduce the processing costs of the cross beam and purlins of the photovoltaic pergola, and at the same time reduce the error rate of processing the cross beam and purlins of the photovoltaic pergola.

[0041] Further, in step S1, the length or width of the plate body is equally divided to obtain an equal division dimension, and a value coefficient is obtained according to the local environmental parameters and the equal division dimension, including the steps of:

[0042] S11. Determine a preset number of equal division parts, and equally divide the length or width of the plate body according to the preset number of equal division parts to obtain the equal division dimension;

[0043] S12. Calculate the maximum simply supported span of the purlin according to the local environmental parameters, the allowable strength of the purlin, and the allowable deflection of the purlin;

[0044] S13. Calculate the value coefficient according to the maximum simply supported span of the purlin and the equal division dimension; wherein, the value coefficient is an integer.

[0045] Further, in step S13, calculating the value coefficient according to the maximum simply supported span of the purlin and the equal division dimension includes:

[0046] Calculate the value coefficient according to the following formula:

[0047]

[0048] wherein, a is the value coefficient, is the maximum simply supported span of the purlin, is the equal division dimension, is the length or width of the plate body, n is the preset number of equal division parts, and Int is the rounding function.

[0049] Further, the environmental parameters include: local wind pressure, local snow pressure, maximum allowable height of the pergola, etc.

[0050] As can be seen from the above description, the pergola is designed according to the local environmental parameters, and its safety performance is high.

[0051] Further, in the step S2, calculating the lengths of the standard purlin, the cantilever purlin, and the supplementary purlin according to the value coefficient and the equal division size respectively includes:

[0052] Calculating the lengths of the standard purlin, the cantilever purlin, and the supplementary purlin respectively according to the following formulas:

[0053]

[0054] where L 1 is the length of the standard purlin, a is the value coefficient, is the equal division size, is the length or width of the plate body, n is the preset number of equal divisions, is the length of the cantilever purlin, b is the first preset integer value, is the length of the supplementary purlin, c is the second preset integer value.

[0055] As can be seen from the above description, the lengths of the three types of purlins are calculated according to the local environmental parameters and the equal division size, so that the lengths of the three types of purlins and the length / width of the plate body can be counted in base n; among them, the length of the standard purlin is the purlin length of the most economical simply supported span of the shed frame for this length / width of the plate body applied locally; the cantilever purlin has a balancing effect on the cantilever span load, and the length of the cantilever purlin can be b module lengths more than the length of the standard purlin; the supplementary purlin is used to make up the remainder of the total length during modular assembly, so the length of the supplementary purlin is c module lengths less than the length of the standard purlin. For the convenience of calculation, the first preset integer value b and the second preset integer value c can take values of 1 or 2.

[0056] Further, the cross beam includes an intermediate part and a cantilever part, the intermediate part includes the standard purlin and / or the supplementary purlin, and the cantilever part is the standard purlin, the cantilever purlin or the supplementary purlin.

[0057] As can be seen from the above description, the length of the cantilever purlin is large, and the economy and flexibility of the cantilever purlin are better than those of the standard purlin 1 and the supplementary purlin 3. However, when the cantilever purlin is used as the simply supported beam of the shed frame in the intermediate part 41, its span exceeds the limit. Therefore, the cantilever purlin is used for the arrangement of the cantilever part 42 of the cross beam 4, while the standard purlin 1 and the supplementary purlin 3 can simultaneously take into account the arrangement of the intermediate part 41 and the cantilever part 42 of the cross beam 4.

[0058] Further, the connection position of the purlin of the cantilever part 42 and the side column of the shed frame can be adjusted and set within a preset adjustment range.

[0059] As can be seen from the above description, the overhanging load of the overhanging part of the crossbeam has a balancing effect. The load-bearing capacity of the purlin of the overhanging part of the crossbeam is better than that of the simply supported beam in the middle part of the crossbeam. Therefore, the side column connected to the purlin of the overhanging part of the crossbeam can meet the structural requirements while the connection position between the purlin of the overhanging part of the crossbeam and the side column can be adjusted within a certain range, which can improve the ability of the pergola to avoid obstacles in the installation environment and enhance the flexibility of pergola installation. The standard purlin and the supplementary purlin are used for the overhanging part and can only move inward due to length restrictions, which affects the usable space of the column spacing and has poor adjustability. Therefore, setting the overhanging part of the crossbeam as the overhanging purlin can improve the adjustability of the pergola, and the overhanging purlin can be preferentially selected as the purlin of the overhanging part of the crossbeam.

[0060] Further, it further includes step S4: Select one of the combination methods of the standard purlin, the overhanging purlin, and the supplementary purlin as the crossbeam assembly, and design the inclined beam and the support column of the pergola according to the obstacles in the installation site of the crossbeam assembly and the pergola.

[0061] As can be seen from the above description, there are still various ways to arrange the standard purlin, the overhanging purlin, and the supplementary purlin in the crossbeam combination, which can be flexibly applied to match the pergola installation environment to ensure that the formed inclined beam and column grid can flexibly avoid obstacles in the installation environment.

[0062] Another object of the present invention is to provide a photovoltaic pergola designed according to the above modular pergola design method. The photovoltaic pergola is used to support a plurality of photovoltaic panels arranged in a matrix, and includes a plurality of inclined beams 6, a plurality of support columns 5, and a plurality of crossbeams 4. The inclined beams 6 are arranged on the support columns 5, the crossbeams 4 are arranged on the inclined beams 6, and the crossbeams 4 include at least one of the standard purlin 1, the overhanging purlin 2, and the supplementary purlin 3.

[0063] As can be seen from the above description, the photovoltaic pergola of the present invention at least has all the beneficial effects of the above modular pergola design method. Its installation methods are rich and diverse. The number of components of the purlin of the crossbeam 4 of the photovoltaic pergola is small. Only three types of purlins, namely the standard purlin 1, the overhanging purlin 2, and the supplementary purlin 3, need to be prepared in a single area to meet the personalized construction requirements of the pergola for plates with the same width or length in this area.

[0064] Further, the crossbeam 4 includes a middle part 41 and an overhanging part 42. The middle part 41 includes the standard purlin 1 and / or the supplementary purlin 3, and the overhanging part 42 is the standard purlin 1, the overhanging purlin 2, or the supplementary purlin 3.

[0065] As can be seen from the above description, the length of the cantilever purlin 2 is large, and the economy and flexibility of the cantilever purlin 2 are better than those of the standard purlin 1 and the supplementary purlin 3. However, when the cantilever purlin 2 is used as a simply supported beam of the pergola in the middle part 41, its span exceeds the limit. Therefore, the cantilever purlin 2 is used for the layout of the cantilever part 42 of the cross beam 4, while the standard purlin 1 and the supplementary purlin 3 can simultaneously take into account the layout of the middle part 41 and the cantilever part 42 of the cross beam 4.

[0066] Embodiment 1

[0067] Please refer to Figure 1 , Embodiment 1 of the present invention is: providing a modular pergola design method, which includes the following steps:

[0068] S1: Divide the length or width of the plate body according to a preset number of equal parts to obtain an equal division size, and obtain a value coefficient according to the local environmental parameters and the equal division size;

[0069] S2: Calculate the length of the standard purlin, the length of the cantilever purlin, and the length of the supplementary purlin respectively according to the value coefficient and the equal division size;

[0070] S3: Obtain at least one combination mode of the standard purlin, the cantilever purlin, and the supplementary purlin according to the number of columns of the multiple plate bodies arranged in a matrix, and form the cross beam of the pergola by combining the standard purlin, the cantilever purlin, and the supplementary purlin.

[0071] In the above step S1, dividing the length or width of the plate body to obtain an equal division size, and obtaining a value coefficient according to the local environmental parameters and the equal division size includes the steps:

[0072] S11. Determine the preset number of equal parts, and divide the length or width of the plate body according to the preset number of equal parts to obtain the equal division size;

[0073] S12. Calculate the maximum simply supported span of the purlin according to the local environmental parameters, the allowable strength of the purlin, and the allowable deflection of the purlin;

[0074] S13. Calculate the value coefficient according to the maximum simply supported span of the purlin and the equal division size; wherein, the value coefficient is an integer.

[0075] Specifically, in the above step S13, calculating the value coefficient according to the maximum simply supported span of the purlin and the equal division size includes:

[0076] Calculate the value coefficient according to the following formula:

[0077]

[0078] wherein, a is the value coefficient, is the simple support span of the maximum purlin, is the equal division dimension, is the length or width of the plate body, n is the preset number of equal divisions, and Int is the rounding function.

[0079] In this embodiment, in the above step S2, calculating the lengths of the standard purlin, the cantilever purlin, and the supplementary purlin according to the value-taking coefficient and the equal division dimension respectively includes:

[0080] Calculating the lengths of the standard purlin, the cantilever purlin, and the supplementary purlin respectively according to the following formulas:

[0081]

[0082] wherein, L 1 is the length of the standard purlin, a is the value-taking coefficient, is the equal division dimension, is the length or width of the plate body, n is the preset number of equal divisions, is the length of the cantilever purlin, b is the first integer preset value, is the length of the supplementary purlin, c is the second integer preset value.

[0083] In this embodiment, the lengths of the three purlins and the length or width of the plate body can be calculated in the n-ary system; the technical method of the n-ary system means that when calculating the numbers on each digit, it is carried over by n.

[0084] Preferably, the preset number of equal divisions n can be set to 3 or 4, so as to design the shed frame by trisecting or quadrisecting the size of the plate body, so that the lengths of the three purlins and the length or width of the plate body can be counted in ternary or quaternary, reducing the calculation difficulty, ensuring the feasibility of setting the length of the supplementary purlin, and ensuring the feasibility of supplementing with the remainder segment of the equal division modulus. Of course, in some embodiments, when the length of the supplementary purlin can be appropriately selected to meet the remainder segment supplement, the preset number of equal divisions n can be set to any integer.

[0085] Specifically, the cantilever purlin 2 is increased by b module lengths on the basis of the length of the standard purlin 1. Correspondingly, the supplementary purlin 3 is reduced by c module lengths on the basis of the length of the standard purlin 1. Preferably, the first preset integer value b and the second preset integer value c can be specifically set to 1 or 2 for convenient calculation.

[0086] Please refer to Figure 2, in this embodiment, the cross beam 4 includes an intermediate part 41 and a cantilever part 42. The intermediate part 41 includes a standard purlin 1 and / or a supplementary purlin 3, and the cantilever part 42 is a standard purlin 1, a cantilever purlin 2 or a supplementary purlin 3. Among them, the connection position of the purlin 42 of the cantilever part with the side column 8 of the shed frame can be adjusted within a preset adjustment range.

[0087] Embodiment 2

[0088] Please refer to Figures 2 to 6 , Embodiment 2 of the present invention is to apply the modular shed frame design method provided in Embodiment 1 to design a photovoltaic shed frame in a region. Embodiment 2 of the present invention is as follows:

[0089] First, query the information of environmental parameters such as local wind pressure, local snow pressure, and the maximum allowable height of the shed frame, and then combine the allowable strength of the purlin and the allowable deflection of the purlin to calculate the maximum simply supported span L of the purlin max , in this Embodiment 2, the maximum simply supported span of the purlin in this region is calculated to be 4336 mm. In this Embodiment 2, the preset equal division number n = 3 is set, and in this Embodiment 2, a photovoltaic shed frame applied to a photovoltaic panel with a length dimension of 2283 mm (including the seam length) is designed. The value coefficient a is calculated according to the following formula:

[0090]

[0091] According to the value coefficient and the length of the photovoltaic panel, the most economical purlin length of the photovoltaic shed frame applied to the photovoltaic panel of this length in the local area can be calculated as , and the above-mentioned most economical purlin length is used as the length of the standard purlin.

[0092] It is easy to understand that in this Embodiment 2, the length of the standard purlin and the length of the photovoltaic panel can be counted in ternary, and the length of the standard purlin can be denoted as ; in this Embodiment 2, for example, the length of the cantilever purlin is increased by one module length on the basis of the length of the standard purlin. Therefore, the length of the cantilever purlin can be denoted as ; please refer to Figure 3 , the length of the column spacing section 21 of the cantilever purlin 2 is the same as the length of the standard purlin, both are , and the length of the cantilever section 22 of the cantilever section 2 is .

[0093] The length of the supplementary purlin is reduced by one module length on the basis of the length of the standard purlin. Therefore, the length of the supplementary purlin can be denoted as . The function of the supplementary purlin is to solve the remainder of the total length of the modular bottle.

[0094] The cross beam 4 includes an intermediate part 41 and a cantilever part 42. The intermediate part 41 includes a standard purlin 1 and / or a supplementary purlin 3, and the cantilever part 42 is a standard purlin 1, a cantilever purlin 2 or a supplementary purlin 3.

[0095] The overhanging load of the purlins in the overhanging part has a balancing effect. The force model of the purlins in the middle part is the same as that of a simply supported beam, and the bearing capacity of the force model of the purlins in the overhanging part is better than that of the simply supported force model of the purlins in the middle part. Therefore, when the structure and bearing performance are satisfied, the side columns connected to the purlins in the overhanging part can move within a certain range, and setting an overhanging part in the cross beam can improve the flexibility of the photovoltaic shed frame to avoid obstacles in the installation environment.

[0096] Standard purlins and supplementary purlins are used in the overhanging part. Due to length limitations, they can only move inward, which affects the use space of the column spacing and has poor adjustability. Therefore, overhanging purlins can be preferentially selected as the purlins for the overhanging part of the cross beam.

[0097] When designing a photovoltaic shed frame, there is a multiple relationship between the total length of the photovoltaic panel array 9 and the length of a single photovoltaic panel, and the lengths L 1 of the standard purlin 1, the length L 2 of the overhanging purlin 2, and the length L 3 of the supplementary purlin 3 and the length of a single photovoltaic panel can be calculated in ternary and all contain a common divisor L pv / n. Therefore, the combination of standard purlins, overhanging purlins, and supplementary purlins can complete the layout design of the cross beams of the photovoltaic shed frame for all photovoltaic panels with this length dimension applied in this area.

[0098] Specifically, the photovoltaic shed frame designed in this second embodiment includes a plurality of inclined beams 6, a plurality of columns 5, and a plurality of cross beams 4. The inclined beams 6 are arranged on the columns 5, the cross beams 4 are arranged on the inclined beams 6, and the cross beams 4 include at least one of the standard purlin 1, the overhanging purlin 2, and the supplementary purlin 3.

[0099] Please refer to Figure 5 (a). When the photovoltaic panel array 9 is arranged on the photovoltaic shed frame, the edge of the photovoltaic panel array can be flush with the cross beam 4. In this case, the total length of the cross beam 4 is equal to the total length of the photovoltaic panel array. When the number of columns of the photovoltaic panel array is N, the total length of the cross beam 4 is set to N*L pv .

[0100] Please refer to Figure 5 (b). The edge of the photovoltaic panel array 9 can also extend relative to the edge of the cross beam 4 so that the photovoltaic panel array is cantilevered relative to the cross beam 4, and the overhanging length of one side of the photovoltaic panel array relative to the cross beam 4 is L pv / 6, and the total overhanging length of both sides of the photovoltaic panel array relative to the cross beam 4 is L pv / 3, that is, 0.1L pv . When the number of columns of the photovoltaic panel array is N, the total length of the cross beam 4 is set to N*L pv -Lpv / 3。

[0101] Based on the above analysis, it can be known that: the cross beams 4 of all the photovoltaic pergolas applied to the above photovoltaic panels in this area can be formed by combining the standard purlin 1, the cantilever purlin 2 and the supplementary purlin 3.

[0102] As an example, in the second embodiment, all the combination methods of the cross beam 4 are listed when the number of columns of the photovoltaic panel array is 3 - 8:

[0103]

[0104] Among them, the cantilever purlin has a large length, and its economy and flexibility are better than those of the standard purlin and the supplementary purlin. However, when the cantilever purlin is used as the simply supported beam of the pergola in the middle part, its span exceeds the limit. Therefore, the cantilever purlin is used for the layout of the cantilever part of the cross beam, while the standard purlin and the supplementary purlin can take into account the layout of both the middle part and the cantilever part of the cross beam at the same time.

[0105] Please further refer to Figure 6 , which schematically shows that when the number of columns N of the photovoltaic panel array is 5, the cross beam 4 assembly is composed of three different combination methods. Figure 6 (a) shows the selection of one standard purlin 1, one supplementary purlin 3 and one cantilever purlin 2 to form the support of the photovoltaic panel array with 5 columns; Figure 6 (b) shows the selection of three standard purlins 1 to form the support of the photovoltaic panel array with 5 columns; Figure 6 (c) shows the selection of two supplementary purlins 3 and one cantilever purlin 2 to form the support of the photovoltaic panel array with 5 columns.

[0106] During the actual installation of the photovoltaic pergola, the spatial positions of the supplementary purlin 3 and the standard purlin 1 can be adjusted by swapping according to the obstacle situation of the installation site; the cantilever part 42 of the cross beam 4 has a balancing effect on the cantilever span load. Therefore, the connection position between the purlin of the cantilever part 42 and the side column 8 of the pergola can be adjusted and set within the preset adjustment range, and the flexibility of avoiding obstacles in the installation site by applying this modular pergola design method is high.

[0107] Please refer to Figure 4 , taking the cantilever part of the cross beam as the cantilever purlin as an example in the second embodiment. In the second embodiment, the above preset adjustment range can be determined according to the following steps: according to the local wind pressure, snow pressure and the maximum allowable height of the pergola, the allowable mid-span length of the cantilever purlin can be calculated to determine C1, and the allowable cantilever length can be calculated to determine C2; taking the position where the column spacing between the side column 8 and the middle column 7 is the standard purlin spacing L1 as the moving origin of the side column 8, and taking the direction of the side column 8 moving closer to the middle column 7 as the negative direction, the side column 8 can move within the following range: [C2 - L1, C1 - L1].

[0108] Standard purlins and supplementary purlins are used for the cantilever section. Due to length limitations, they can only move inward, which affects the usable space of the column spacing and has poor adjustability. Therefore, cantilever purlins are preferably selected as the purlins for the cantilever part of the crossbeam.

[0109] As an example, when the length of the standard purlin 1 is 3805 mm, C1 is 4235 mm, and C2 is 3525 mm, one end of the cantilever purlin 2 is connected to the middle column 7. The column span between the side column 8 and the middle column 7 at the position equal to the length of the standard purlin 1 is used as the moving origin of the side column 8. The direction in which the side column 8 approaches the middle column 7 is taken as the negative direction of movement. The preset adjustment range of the side column 8 is [-280, +430].

[0110] In summary, the modular pergola design method provided by the present invention adopts the modular design concept, modularly designs the length of the purlin based on the size of the plate body to obtain purlins with three length sizes: standard purlins, cantilever purlins, and supplementary purlins. And the crossbeam of the pergola is formed by the combination of the three purlins. This method can realize the modular design of the purlins of the pergola, with high flexibility. By setting the three purlins, it can meet the personalized construction requirements of pergolas applied to plates with the same width or length size within a single region. Its application in building a photovoltaic pergola can reduce the difficulty of modular design of the photovoltaic pergola, improve the design efficiency of the photovoltaic pergola, simplify the structural complexity of the photovoltaic pergola, reduce the processing cost of the purlins of the crossbeam of the photovoltaic pergola, and at the same time reduce the error rate of processing the purlins of the crossbeam of the photovoltaic pergola.

[0111] The above are only the embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent transformations made using the content of the specification and drawings of the present invention, directly or indirectly applied in related technical fields, are equally included in the patent protection scope of the present invention.

Claims

1. A modular scaffolding design method, characterized in that: The scaffold is used to support a plurality of panels arranged in a matrix, and includes the following steps: S1: Divide the length or width of the plate into equal parts according to a preset number of equal parts to obtain equal-division sizes, and obtain a value coefficient according to local environmental parameters and the equal-division sizes; S2: Calculate the length of the standard purlin, the length of the cantilever purlin and the length of the supplementary purlin respectively according to the value coefficient and the equally divided size; S3: obtaining at least one combination of the standard purlin, the cantilever purlin and the supplementary purlin according to the number of columns of the plurality of plates arranged in a matrix, and forming a crossbeam of the scaffold by combining the standard purlin, the cantilever purlin and the supplementary purlin; Wherein, the crossbeam includes a middle part and a cantilever part, the middle part includes the standard purlin and / or the supplementary purlin, and the cantilever part is the standard purlin, the cantilever purlin or the supplementary purlin; the connection position of the purlin of the cantilever part and the side column of the scaffolding can be adjusted within a preset adjustment range.

2. The modular scaffolding design method according to claim 1, characterized in that: In the step S1, the length or width of the plate is divided into equal parts to obtain equal-division sizes, and a value coefficient is obtained according to local environmental parameters and the equal-division sizes, including the steps of: S11, determining a preset number of equal parts, and dividing the length or width of the plate into equal parts according to the preset number of equal parts to obtain the equal-division size; S12. Calculate the maximum purlin simply supported span based on local environmental parameters, purlin allowable strength and purlin allowable deflection; S13. Calculate the coefficient according to the maximum purlin simply supported span and the equally divided size; wherein the coefficient is an integer.

3. The modular scaffolding design method according to claim 2, characterized in that: In the step S13, the value coefficient is calculated according to the maximum purlin simply supported span and the equally divided size, including: The value coefficient is calculated according to the following formula: Wherein, a is the value coefficient, is the maximum purlin simply supported span, For the said equal division size, is the length or width of the plate, n is the preset number of equal parts, and Int is the rounding function.

4. The modular scaffolding design method according to claim 1, characterized in that: The environmental parameters include: local wind pressure, local snow pressure, and maximum allowable height of the scaffolding.

5. The modular scaffolding design method according to claim 1, characterized in that: In the step S2, respectively calculating the length of the standard purlin, the length of the cantilever purlin and the length of the supplementary purlin according to the value coefficient and the equally divided size includes: The length of the standard purlin, the length of the cantilever purlin and the length of the supplementary purlin are calculated respectively according to the following formulas: Wherein, L1 is the length of the standard purlin, a is the value coefficient, For the said equal division size, is the length or width of the plate, n is the number of equal parts, is the length of the cantilever purlin, b is the first preset integer value, To supplement the length of the purlin, c is a second preset integer value.

6. The modular scaffolding design method according to claim 1, characterized in that: The method further comprises step S4: selecting a combination of the standard purlin, the cantilever purlin and the supplementary purlin as a crossbeam assembly, and designing the inclined beams and pillars of the scaffolding according to obstacles at the installation site of the crossbeam assembly and the scaffolding.

7. A photovoltaic shed designed according to the modular shed design method according to any one of claims 1 to 6, characterized in that: The photovoltaic scaffolding is used to support multiple photovoltaic panels arranged in a matrix, and includes a plurality of inclined beams, a plurality of pillars and a plurality of cross beams. The inclined beams are arranged on the pillars, and the cross beams are arranged on the inclined beams. The cross beams include at least one of a standard purlin, a cantilever purlin and a supplementary purlin.

8. The photovoltaic scaffolding according to claim 7, characterized in that: The cross beam comprises a middle portion and a cantilever portion, the middle portion comprises the standard purlin and / or the supplementary purlin, and the cantilever portion is the standard purlin, the cantilever purlin or the supplementary purlin.

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