CN211531036U - Purline for photovoltaic module installation - Google Patents
Purline for photovoltaic module installation Download PDFInfo
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- CN211531036U CN211531036U CN202020211182.8U CN202020211182U CN211531036U CN 211531036 U CN211531036 U CN 211531036U CN 202020211182 U CN202020211182 U CN 202020211182U CN 211531036 U CN211531036 U CN 211531036U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E10/50—Photovoltaic [PV] energy
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Abstract
The utility model provides a purlin for photovoltaic module installs. At least one closed cavity is arranged in the purline for mounting the photovoltaic module, and a foaming material for enhancing the compressive strength of the purline is arranged in the closed cavity. The purlin for photovoltaic module installation provided by the utility model is suitable for single-sided assemblies and double-sided assemblies, the weight of the unit length of the purlin is reduced by arranging the closed cavity in the purlin, and the overall compressive strength and stability of the purlin are improved by arranging the filling material in the cavity; and, the utility model provides a purlin can be according to the intensity requirement, adjusts the shape, the size of cavity and thin steel plate thickness to satisfy different areas and different loads to the requirement of purlin intensity.
Description
Technical Field
The utility model relates to a photovoltaic module technical field, concretely relates to purlin for photovoltaic module installs.
Background
Purlines used in solar photovoltaic power stations are generally made of U-shaped structures, C-shaped structures and Z-shaped steel materials formed by cold-bending hot-dip galvanized steel plates, and are an important part with large steel quantity in photovoltaic module mounting structures. In order to adapt to load requirements such as different spans, wind pressure, snow pressure and the like, the structure and the size of the purline, the thickness of the base material and the specification and the model can be selected according to the span, the wind pressure and the snow pressure; however, most purlins in the prior art are made of galvanized steel plates into solid U-shaped, C-shaped or Z-shaped structures, the wall thickness of the purlins in the structures is 2mm or more, the purlins are heavy in unit length and high in price, and although the weight of purlins made of aluminum alloy can be reduced, the cost is greatly increased.
In view of this, a new structural form of the purlin is developed to reduce the weight per unit length without affecting the original strength requirement of the purlin, and different materials are made by different manufacturing processes, such as steel sheets.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art not enough, provide a purlin for photovoltaic module installs.
The utility model provides a pair of a purlin for photovoltaic module installs, the purlin adopts corrosion resistance, strong weatherability's steel sheet clod wash shaping, be provided with at least one closed cavity in the purlin, be provided with the expanded material who is used for strengthening purlin compressive strength in the closed cavity.
The utility model provides a pair of a purlin for photovoltaic module installation still includes following attached technical scheme:
the purline is formed by cold bending a steel plate or a metal alloy plate as a base material, and the outer surface of the purline is provided with a corrosion-resistant metal coating or a paint protective layer; or the like, or, alternatively,
the purlines are formed by extrusion by taking aluminum alloy or magnesium alloy as a base material, and the surfaces of the aluminum alloy or magnesium alloy are subjected to oxidation treatment or coated with paint protective layers.
And the upper surface and the lower surface of the purline and/or two side walls of the cavity are respectively provided with a sawtooth structure or a wave structure.
The purlines are cold-bent into C-shaped structures by using steel plates or metal alloy plates as base materials, or extruded into C-shaped structures by using aluminum alloys or magnesium alloys as base materials;
a closed cavity is formed in the purline of the C-shaped structure, and a foaming material used for enhancing the strength of the purline of the C-shaped structure is arranged in the closed cavity.
The purlines are cold-bent into U-shaped structures by using steel plates or metal alloy plates as base materials, or extruded into U-shaped structures by using aluminum alloys or magnesium alloys as base materials;
two closed cavities are arranged in the purlines of the U-shaped structures, and foaming materials used for enhancing the strength of the purlines of the U-shaped structures are arranged in the closed cavities.
The purlines are cold-bent into Z-shaped structures by using steel plates or metal alloy plates as base materials, or extruded into Z-shaped structures by using aluminum alloys or magnesium alloys as base materials;
a closed cavity is formed in the Z-shaped purline, and a foaming material used for enhancing the strength of the Z-shaped purline is arranged in the closed cavity.
And flanging, meshing or welding is carried out at the edge seam of the purline.
The utility model discloses an implement including following technological effect:
the purlin for photovoltaic module installation provided by the utility model is suitable for single-sided assemblies and double-sided assemblies, the weight of the unit length of the purlin is reduced by arranging the closed cavity in the purlin, and the overall compressive strength and stability of the purlin are improved by arranging the filling material in the cavity; and, the utility model provides a purlin can be according to the intensity requirement, adjusts the shape, the size of cavity and thin steel plate thickness to satisfy different areas and different loads to the requirement of purlin intensity.
And, when considering that the purlin material becomes steel from the aluminum alloy material, its intensity has increased, nevertheless chooses for use thicker steel, and its weight also can greatly increased, especially steel do not have the extrusion lumber condition like the aluminum alloy, and the steel of bending welds into holistic processing degree of difficulty and processing cost higher, the utility model discloses creatively utilizes the very light special effect of expanded material, foams in the steel shaping frame of bending, makes it to form honeycomb's integral frame, can guarantee the intensity of purlin, does not influence the weight of purlin again.
Drawings
Fig. 1 is a schematic structural view of a purlin for photovoltaic module installation according to an embodiment of the present invention, which is a C-shaped structure.
Fig. 2 is a schematic structural view of a purlin for photovoltaic module installation according to an embodiment of the present invention, which is a U-shaped structure.
Fig. 3 is a schematic structural diagram of a purlin for photovoltaic module installation according to an embodiment of the present invention, which is a Z-shaped structure.
Fig. 4 is a schematic structural diagram of a purlin for photovoltaic module installation according to another embodiment of the present invention, which is a C-shaped structure.
Fig. 5 is a schematic structural view of a purlin for photovoltaic module installation according to another embodiment of the present invention, which is a U-shaped structure.
Fig. 6 is a schematic structural diagram of a purlin for photovoltaic module installation according to another embodiment of the present invention, which is a Z-shaped structure.
Fig. 7 is an enlarged view of a portion a of fig. 4-6.
Fig. 8 is a partial enlarged view at B in fig. 4-6.
FIG. 9 is a schematic view of the distribution of loads borne by a Z-section purlin and a U-section purlin;
FIG. 10 is a schematic view showing the position and direction of bearing capacity of a Z-shaped composite section purlin;
FIG. 11 is a schematic view showing the position and direction of bearing capacity of a purline with a U-shaped cross section;
FIG. 12 is a schematic view of a Z-shaped composite section purlin grid division;
FIG. 13 is a schematic view of a grid division of a purlin of U-shaped cross-section;
FIG. 14 is a finite element analysis diagram of a purlin with Z-shaped composite cross section;
fig. 15 is a finite element analysis diagram of a purlin with a U-shaped section.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
Generally, plate rolling is a process of performing continuous three-point bending on a plate by using a plate rolling machine. When the equipment is used for rolling the plate, the plate is placed between the upper working roll and the lower working roll. The upper roller vertically goes up and down, and the two lower rollers rotate and horizontally move relative to the axial center plane of the upper roller. When the upper roll descends, the plate is subjected to plastic deformation between the upper working roll and the lower working roll to be bent. The lower roller continuously rotates to drive the steel plate to move forward and backward through the friction force between the plate and the roller to complete rolling, and the whole process also comprises operations such as pre-bending, centering, rolling, rounding and the like.
The foaming materials in the chemical field are various, and can be classified into soft, hard and semi-hard according to hardness, and classified into low foaming foam materials, medium foaming foam materials, high foaming foam materials and the like according to density. Common foaming process methods such as a batch foaming method, a die-pressing foaming method, an extrusion foaming method and the like, and an extrusion foaming method is preferably adopted. The extrusion foaming method is that plastic material containing foaming agent is added into an extruder, and through rotation of a screw and heating outside a cylinder, the material is sheared, melted, plasticized and mixed, and the melted material is changed from high pressure to normal pressure when being extruded from a die orifice of a machine head, so that gas dissolved in the material is expanded to complete foaming. The most prominent characteristic of the molding method is continuous production, and different types of products can be produced by replacing the machine head.
The preferable polyurethane PU foaming joint filling material is widely applied to the fields of home decoration doors and windows and the like. The polyurethane rigid foam is a low-density microporous material with a closed cell structure, has the advantages of light weight, high specific strength, small heat conductivity coefficient, low water absorption and convenient construction and operation, and can be prepared into foam materials with different hardness, chemical resistance and mechanical strength by changing the composition, formula proportion, synthesis condition and method of the materials. Many of the physical properties of polyurethane foams depend on their cell structure, and for rigid foams, the cells are preferably of closed cell structure.
The utility model provides a pair of a purlin for photovoltaic module installs, the purlin adopts corrosion resistance, strong weatherability's steel sheet clod wash shaping, be provided with at least one closed cavity in the purlin, be provided with the expanded material who is used for strengthening purlin compressive strength in the closed cavity.
It should be noted that the steel sheet for rolling in the present invention may also preferably be a high corrosion resistance coated steel sheet "SuperDyma" developed by new day iron, or an aluminum-magnesium-zinc steel sheet of korean purkinje steel. Taking the new-day iron SuperDyma as an example, the novel corrosion-resistant coated steel plate which is mainly made of zinc and consists of 11% of aluminum, 3% of magnesium and a trace amount of silicon has good rust prevention and processing performances, such as good rust prevention of planes and end parts, difficult rusting of a bending forming part and a stretching part, few scratches on the surface of a processing part, and good weldability and paintability.
Moreover, the service life of 30-50 years can be provided for the steel by adopting the latest anticorrosion measure or adopting an anticorrosion finished product steel, thereby fundamentally solving the problems of easy corrosion and service life of the steel.
The purlin for photovoltaic module installation provided by the utility model is suitable for single-sided assemblies and double-sided assemblies, the weight of the unit length of the purlin is reduced by arranging the closed cavity in the purlin, and the overall compressive strength and stability of the purlin are improved by arranging the filling material in the cavity; and, the utility model provides a purlin can be according to the intensity requirement, adjusts the shape, the size of cavity and thin steel plate thickness to satisfy different areas and different loads to the requirement of purlin intensity.
Optionally, the purline is formed by cold bending a steel plate or a metal alloy plate as a base material, and the outer surface of the purline is provided with a corrosion-resistant metal coating or a paint protective layer; or the like, or, alternatively,
the purlines are formed by extrusion by taking aluminum alloy or magnesium alloy as a base material, and the surfaces of the aluminum alloy or magnesium alloy are subjected to oxidation treatment or coated with paint protective layers.
In some embodiments, as shown in fig. 4-8, the upper and lower surfaces of the purlin and/or the two sidewalls of the cavity are provided with a concave-convex structure. The concave-convex structure can increase the effective contact area between the assembly purline and the filling structure in the cavity, so that the strength of the purline can be effectively improved; set up concave-convex structure simultaneously on the purlin, this concave-convex structure and the inside filling structure of cavity fully contact, even filling structure can wrap up the one side and two sides that concave-convex structure and filling structure contacted on the purlin to make this concave-convex structure be equivalent to filling structure's strengthening rib, thereby can improve the common compressive capacity of organizing behind purlin and the combination of cavity filler effectively.
In some more preferred embodiments, the relief structure is a zigzag structure or a wave structure.
In one embodiment, as shown in fig. 1 and 4, a steel plate or a metal alloy plate is selected as a base material to be cold-bent into a C-shaped structure, or the purlin is extruded into the C-shaped structure by using an aluminum alloy or a magnesium alloy as a base material; a closed cavity 1 is arranged in the purline with the C-shaped structure, and a foaming material used for enhancing the strength of the purline with the C-shaped structure is arranged in the closed cavity.
In one embodiment, as shown in fig. 2 and 5, the purlines are cold-bent into a U-shaped structure by using steel plates or metal alloy plates as base materials, or extruded into a U-shaped structure by using aluminum alloys or magnesium alloys as base materials; two closed cavities 2 are arranged in the purlines of the U-shaped structures, and foaming materials used for enhancing the strength of the purlines are arranged in the closed cavities 2.
In one embodiment, as shown in fig. 3 and 6, the purlines are cold-bent into a Z-shaped structure by using steel plates or metal alloy plates as base materials, or extruded into a Z-shaped structure by using aluminum alloys or magnesium alloys as base materials; a closed cavity 3 is arranged in the purline of the Z-shaped structure, and a foaming material used for enhancing the strength of the purline of the Z-shaped structure is arranged in the closed cavity 3.
Preferably, the foaming material can be made of organic materials or inorganic materials, preferably rigid polyurethane foam plastics or unsaturated polyester plastics, the unsaturated polyester plastics comprise a component A and a component B, the component A comprises unsaturated polyester resin, a thickening agent, an initiator and a filler, and the component B is glass fiber coarse sand or glass fiber felt.
Specifically, the utility model provides a polyurethane foam, polyurethane hard bubble for short has light in weight, excellent performance such as intensity height, and dimensional stability is good, and the adhesion is strong, to metals such as steel, aluminium, stainless steel, most plastic materials such as timber, concrete, pitch have good cohesive strength. In addition, the closed-cell rate of the rigid polyurethane is more than 95%, and the rigid polyurethane belongs to a hydrophobic material, so that the assembly purline has moisture-proof and waterproof performances; moreover, polyurethane is a flame-retardant self-extinguishing material after a flame retardant is added, and the softening point of the polyurethane can reach more than 250 ℃, so that the purline of the assembly has the performances of fire prevention, flame retardance and high temperature resistance. Finally, subassembly purlin resistance to deformation ability in this application is strong, difficult fracture, and the veneer is stable, safe.
In some embodiments, as shown in fig. 1-3, the purlins may be flanged at their side seams for waterproofing.
The welding modes in this embodiment include resistance welding, laser welding, and cold welding.
In some embodiments, during the process of rolling the purlin by using a steel plate or a metal alloy plate or extruding and molding the purlin by using an aluminum alloy or a magnesium alloy, a filling structure is arranged in the cavity of the purlin for foaming. The steel coil manufacturing process and the foaming process in the embodiment can be carried out simultaneously, namely, the steel coil is rolled and foamed at the same time, which is not realized for the aluminum purline manufacturing process adopting the injection molding process. In addition, the manufacturing process of rolling and foaming is simple and easy to realize; and the foaming area can be controlled, and the foaming speed can be controlled, so that the manufacturing quality of purlins and the foaming uniformity are controlled.
The utility model discloses an implement and increase the atress analysis from the aspect of software simulation calculation:
1. calculating conditions:
the section of the purline structure in fig. 3-5 is taken as a calculation model, the thickness of the surface thin plate is 0.6mm, and the inside of the surface thin plate is filled with foaming materials such as polyurethane.
2. The calculation assumes:
1) the foaming material filled inside can work with the surface layer thin plate;
2) the external environment temperature (-20-30 ℃) has no influence on the bending strength, compression strength and other strength of the internal filling material;
3) the surface layer thin plate is made of Q345 steel;
4) filling polyurethane material with the interior of the bag under the pressure of 30 MPa;
5) calculating the graph and the cross section.
3. And (3) calculating the bearing capacity:
the bending resistance bearing capacity calculation formula is as follows;
m ═ fe × W-fe + γ × pack × W-pack;
wherein, iron: the yield strength of the rolled steel is 305 Mpa;
w iron: the section modulus of the rolled steel is calculated and determined according to the height and the width of the actual section;
γ: the strength reduction coefficient of the filling material is 0.5-0.9 according to different filling materials;
filling: the yield strength of the filling material, such as the polyurethane material can take 30 Mpa;
filling with W: and the section modulus of the filling material is determined by calculation according to the height and the width of the actual section.
This embodiment chooses for use the utility model provides a Z type composite cross section purlin Z45X 40X 0.6, and conventional U type cross section purlin 41X 2.0 carries out the calculation comparison among the prior art.
The bending resistance bearing capacity of the Z-shaped composite section purline is represented by MZ:
MZ ═ iron zxw iron Z + γ xfill xw fill
＝305×2.28+0.7×30×4＝0.78KN·m；
The bending resistance bearing capacity of the conventional purline with the U-shaped section is expressed by MU:
MU-fe-uxw-fe-U-215 × 3.48-0.748 KN · m.
From the above calculation results, it can be known that: the utility model discloses the bending moment value that Z type composite cross section purlin that well adoption high strength's sheet steel was made can bear can reach, is stronger than the value of bearing of conventional component even. Wherein the filler material provides a strength value of 0.084KN m, which is about 11% of the total load-bearing capacity of the composite member.
Finite element simulation:
respectively taking the weight of the Z-shaped composite section purline Z45 × 40 × 0.6.6 in the case and the weight of the conventional U-shaped section purline 41 × 41 × 2.0.0 in the prior art as 1.23Kg/m and 2.15Kg/m, respectively, calculating the length according to a 2-meter simple beam, and calculating the wind load according to 0.85KN/m2(the assembly withstands a design load of about 2400 Pa). The load bearing modes of the two purlins are the same, and as shown in fig. 9, the line load transmitted to the purlins is calculated to be 1.2KN/m according to the wind load and the dead weight.
As can be seen from the calculations shown in figures 10-15 and described above,
a. the foaming filling material and the rolled steel are tightly combined to bear force together, wherein the filling material in the rolled steel can provide bearing capacity of about 10-15% according to the difference of the overall section form, the cavity volume, the filling material and the like, and the finite element simulation value conforms to the theoretical calculation value.
b. The purline in the optimized market has the calculation span of 2 meters and the wind pressure of 0.85KN/m2(the assembly bears about 2400Pa design load), the common purlin adopts U41 × 41 × 2.0.0, the member meter weight is 2.15Kg/m, the composite purlin member (Z45 × 40 × 0.6) of the embodiment is adopted, the thickness is 0.6mm, the member meter weight is 1.23Kg/m, and the result shows that the calculation results of the two members under the given conditions are similar and both meet the bearing requirement.
Therefore, the foaming material can provide strength and stability for the whole purline, so that the thickness of the purline component is reduced; compared with the conventional purline, the composite purline component saves steel by about 42 percent, and the cost is obviously reduced.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
Claims (8)
1. The utility model provides a purlin for photovoltaic module installation which characterized in that, be provided with at least one closed cavity in the purlin, be provided with the expanded material that is used for strengthening purlin compressive strength in the closed cavity.
2. The purlin for photovoltaic module installation according to claim 1, wherein the purlin is formed by cold-bending a steel plate or a metal alloy plate as a base material, and a corrosion-resistant metal coating or a paint protective layer is arranged on the outer surface of the purlin; or the like, or, alternatively,
the purlines are formed by extrusion by taking aluminum alloy or magnesium alloy as a base material, and the surfaces of the aluminum alloy or magnesium alloy are subjected to oxidation treatment or coated with paint protective layers.
3. The purlin for photovoltaic module installation according to claim 1 or 2, wherein the upper and lower surfaces of the purlin and/or two side walls of the cavity are provided with sawtooth structures or wavy structures.
4. The purlin for photovoltaic module installation according to claim 1 or 2, wherein the purlin is cold-bent into a C-shaped structure by using a steel plate or a metal alloy plate as a base material, or extruded into a C-shaped structure by using an aluminum alloy or a magnesium alloy as a base material;
a closed cavity is formed in the purline of the C-shaped structure, and a foaming material used for enhancing the strength of the purline of the C-shaped structure is arranged in the closed cavity.
5. The purlin for photovoltaic module installation according to claim 1 or 2, wherein the purlin is cold-bent into a U-shaped structure by using a steel plate or a metal alloy plate as a base material, or extruded into a U-shaped structure by using an aluminum alloy or a magnesium alloy as a base material;
two closed cavities are arranged in the purlines of the U-shaped structures, and foaming materials used for enhancing the strength of the purlines of the U-shaped structures are arranged in the closed cavities.
6. The purlin for photovoltaic module installation according to claim 1 or 2, wherein the purlin is cold-bent into a Z-shaped structure by using a steel plate or a metal alloy plate as a base material, or extruded into the Z-shaped structure by using an aluminum alloy or a magnesium alloy as a base material;
a closed cavity is formed in the Z-shaped purline, and a foaming material used for enhancing the strength of the Z-shaped purline is arranged in the closed cavity.
7. The purlin for photovoltaic module installation according to claim 1 or 2, wherein the edge seams of the purlin are subjected to flanging, meshing or welding treatment.
8. The purlin for photovoltaic module installation according to claim 2, wherein a filling structure is arranged in a cavity of the purlin for foaming in a process of rolling the purlin by using a steel plate or a metal alloy plate or extruding and molding the purlin by using an aluminum alloy or a magnesium alloy.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117155223A (en) * | 2023-09-07 | 2023-12-01 | 广东缔美科技发展有限公司 | Cold bending shearing-resistant photovoltaic support component, photovoltaic system and photovoltaic system construction method |
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2020
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117155223A (en) * | 2023-09-07 | 2023-12-01 | 广东缔美科技发展有限公司 | Cold bending shearing-resistant photovoltaic support component, photovoltaic system and photovoltaic system construction method |
| CN117155223B (en) * | 2023-09-07 | 2024-03-26 | 广东缔美科技发展有限公司 | Cold bending shearing-resistant photovoltaic support component, photovoltaic system and photovoltaic system construction method |
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Effective date of registration: 20230302 Address after: No. 99, Sunshine Avenue, Yushan High-tech Zone, Changshu, Suzhou, Jiangsu 215500 Patentee after: Jiangsu Zhongjian Metal Materials Co.,Ltd. Address before: No. 97, Sunshine Avenue, Changfu Street, Changshu, Suzhou, Jiangsu 215557 Patentee before: Repow (Jiangsu) Co.,Ltd. |