A connecting structure and connecting method of a photovoltaic module and a purlin

Abstract

The application provides a connection structure and a connection method of a photovoltaic module and a purlin, adopts an inverted U-shaped clamp spring, a pair of side edges of the inverted U-shaped clamp spring correspondingly abut against both sides of a U-shaped purlin notch, burrs of a pair of photovoltaic module frames are respectively inserted into two clamping grooves in a row of clamping grooves on the top surface of the bottom edge of the inverted U-shaped clamp spring, and a bolt penetrates through the burrs of the pair of photovoltaic module frames, the pair of side edges of the inverted U-shaped clamp spring and the side walls on both sides of the U-shaped purlin and locks them together. The application can flexibly adjust and effectively control the size of the module gap during installation, can flexibly adjust and effectively control the relative position of the module gap and the purlin, and can further make the on-site connection of the photovoltaic module and the purlin more convenient, can better accommodate the installation error of the U-shaped purlin, and can improve the installation precision of the photovoltaic module. The connection structure after installation has better waterproof and drainage performance.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of photovoltaic, in particular to a connecting structure and connecting method of photovoltaic module and purline. BACKGROUND

[0002] Photovoltaic module is often installed on purline for use, and the cross-sectional shape of purline has many kinds, such as C-shaped, H-shaped, Z-shaped, U-shaped, etc. Figure 1 As shown in the figure, the existing connecting method of photovoltaic module and U-shaped purline is generally to set the notch 107 of the U-shaped purline 101 upward, place the photovoltaic module 103 with module frame 102 on both sides of the notch 107 of the U-shaped purline 101 respectively, install the pressing block 104 on the opposite ends of the photovoltaic module 103 / module frame 102, put the square nut 105 into the U-shaped purline 101, and fasten the pressing block 104 and the square nut 105 together through the bolt 106, so that the opposite ends of the photovoltaic module 103 / module frame 102 are pressed tightly on the U-shaped purline 101 by the pressing block 104.

[0003] The existing connecting method of photovoltaic module and U-shaped purline has the following defects:

[0004] 1) The existing connecting method of photovoltaic module and U-shaped purline limits the distance between the two photovoltaic modules 103 / module frames 102 on both sides of the notch 107 of the U-shaped purline 101 by the pressing block 104, so that the size of the module gap (i.e. the distance between the two photovoltaic modules 103 / module frames 102 on both sides of the notch 107 of the U-shaped purline 101) cannot be flexibly adjusted and effectively controlled during installation, which may not meet the actual size requirements of the installation site for the module gap, resulting in difficulties in the on-site connection of the photovoltaic module 103 and the purline 101, and the installation cannot be completed.

[0005] 2) The existing connecting method of photovoltaic module and U-shaped purline cannot flexibly adjust and effectively control the position of the module gap (i.e. the gap between the pair of photovoltaic modules 103 on both sides of the notch 107 of the U-shaped purline 101) in the width direction of the notch 107 of the U-shaped purline 101, and if there is an installation error in the width direction of the U-shaped purline 101 (i.e. the width direction of the notch 107 of the U-shaped purline 101), the installation position of the photovoltaic module 103 may be affected by the installation error of the U-shaped purline 101 itself, thereby failing to ensure the installation accuracy of the photovoltaic module 103.

[0006] 3) the existing photovoltaic module and U-shaped purlin connection mode does not set a reinforcing member in the notch 107 of the U-shaped purlin 101, the strength of the notch 107 of the U-shaped purlin 101 is relatively weak, the anti-deformation ability of the notch 107 of the U-shaped purlin 101 is relatively weak, the notch 107 of the U-shaped purlin 101 may be stressed and deformed during on-site installation, which affects the installation accuracy of the photovoltaic module 103, and even causes difficulty in on-site connection of the photovoltaic module 103 and the purlin 101, and installation cannot be completed;

[0007] 4) the existing photovoltaic module and U-shaped purlin connection mode has poor waterproofing / drainage performance, when it rains, the water flow on the top surface of the photovoltaic module 103 will seep to the outside of the two sides of the U-shaped purlin 101 along the module frame 102. SUMMARY

[0008] To solve the defects of the prior art, the present application provides a photovoltaic module and purlin connection structure, which comprises: a U-shaped purlin with a notch and the notch is arranged upward (the notch and the U-shaped purlin extend in the same direction), a pair of photovoltaic modules arranged on both sides above the notch of the U-shaped purlin and each having a module frame, and a connection assembly connecting the pair of photovoltaic modules and the U-shaped purlin together.

[0009] The module frames on the opposite sides of the pair of photovoltaic modules each have a flash extending downward into the notch of the U-shaped purlin, and the flash and the notch of the U-shaped purlin extend in the same direction.

[0010] The connection assembly comprises: an inverted U-shaped spring inserted into the notch of the U-shaped purlin, and a bolt.

[0011] The inverted U-shaped spring is a profile, comprising: a pair of vertical side edges corresponding to the two sides of the notch of the U-shaped purlin, a bottom edge connected to the bottom ends of the pair of side edges at both ends, and a pair of outer turning edges turned outward from the top ends of the pair of side edges and abutting against the top surface of the U-shaped purlin; the top surface of the bottom edge of the inverted U-shaped spring is further provided with a row of clamping grooves, the row of clamping grooves extend in the same direction as the notch of the U-shaped purlin, and the row of clamping grooves are arranged in sequence along the width direction of the notch of the U-shaped purlin.

[0012] The flash of the module frame of the pair of photovoltaic modules is inserted into two clamping grooves in the row of clamping grooves on the top surface of the bottom edge of the inverted U-shaped spring, and the spacing of the flash of the module frame of the pair of photovoltaic modules is limited and fixed by the two clamping grooves.

[0013] The bolt penetrates the flash of the module frame of the pair of photovoltaic modules, the pair of side edges of the inverted U-shaped spring, and the side walls on both sides of the U-shaped purlin, and the bolt locks the flash of the module frame of the pair of photovoltaic modules, the pair of side edges of the inverted U-shaped spring, and the side walls on both sides of the U-shaped purlin together.

[0014] Preferably, the flash is located in the bottom end inner side of the module frame where it is located.

[0015] Preferably, the flash is located at the bottom end of the frame of the component.

[0016] Preferably, the frame of the component of the pair of photovoltaic components on the opposite side is pressed on the pair of outward flanges of the inverted U-shaped spring.

[0017] Preferably, the row of clamping grooves on the top surface of the bottom edge of the inverted U-shaped spring is uniformly distributed along the width direction of the U-shaped purlin slot.

[0018] Preferably, the row of clamping grooves on the top surface of the bottom edge of the inverted U-shaped spring is wavy in cross section.

[0019] Preferably, the row of clamping grooves on the top surface of the bottom edge of the inverted U-shaped spring is sawtooth-shaped in cross section.

[0020] Preferably, the flash of the frame of the component of the pair of photovoltaic components, the pair of side edges of the inverted U-shaped spring, and the side walls of the U-shaped purlin are respectively provided with through holes for bolts to pass through.

[0021] Preferably, the through hole is a threaded through hole matched with the thread of the bolt.

[0022] Preferably, the connecting assembly further comprises a fastening nut mounted at the tail end of the bolt; and the fastening nut is locked on the outer side wall of the U-shaped purlin.

[0023] Preferably, the connecting assembly further comprises a clamping nut mounted at the tail end of the bolt and located outside the fastening nut; and the clamping nut is locked on the fastening nut.

[0024] Preferably, the connecting assembly is two or more, and the two or more connecting assemblies are sequentially arranged along the extension direction of the U-shaped purlin slot.

[0025] Preferably, the connecting assembly is multiple, and the multiple connecting assemblies are sequentially arranged at equal intervals along the extension direction of the U-shaped purlin slot.

[0026] The application also provides a connecting method of the above connecting structure. When a pair of photovoltaic components is mounted on the U-shaped purlin, two clamping grooves in the row of clamping grooves on the top surface of the bottom edge of the inverted U-shaped spring are selected, the flashes of the frames of the pair of photovoltaic components are respectively inserted into the two clamping grooves, and the interval of the pair of photovoltaic components is adjusted and controlled through the interval of the two selected clamping grooves.

[0027] Preferably, the connecting method comprises the following steps:

[0028] The notch of the U-shaped purlin is arranged upwardly; the inverted U-shaped spring is inserted into the notch of the U-shaped purlin, so that the inverted U-shaped spring and the notch of the U-shaped purlin extend in the same direction (a row of clamping grooves on the top surface of the bottom edge of the inverted U-shaped spring extend in the same direction with the notch of the U-shaped purlin, and the clamping grooves are arranged along the width direction of the notch of the U-shaped purlin), so that a pair of side edges of the inverted U-shaped spring abut against the two sides of the notch of the U-shaped purlin respectively, and a pair of outer flanges of the inverted U-shaped spring abut against the top surface of the U-shaped purlin respectively; two clamping grooves in the row of clamping grooves on the top surface of the bottom edge of the inverted U-shaped spring are selected, the flash of the frame of a pair of photovoltaic modules is inserted into the two clamping grooves respectively, and the distance between the two clamping grooves is used to adjust and control the distance between the pair of photovoltaic modules / the frame (the distance between the flash of the frame of the pair of photovoltaic modules is fixed by the two clamping grooves); the bolt is penetrated through the flash of the frame of the pair of photovoltaic modules, the pair of side edges of the inverted U-shaped spring and the two side walls of the U-shaped purlin (the flash of the frame of the pair of photovoltaic modules, the pair of side edges of the inverted U-shaped spring and the two side walls of the U-shaped purlin are respectively provided with through holes for the bolt to penetrate), and the flash of the frame of the pair of photovoltaic modules, the pair of side edges of the inverted U-shaped spring and the two side walls of the U-shaped purlin are locked together by the bolt.

[0029] Preferably, if the flash is located at the outer edge of the bottom end of the frame, when the pair of photovoltaic modules are installed on the U-shaped purlin, the opposite frames of the pair of photovoltaic modules are pressed on the pair of outer flanges of the inverted U-shaped spring.

[0030] Preferably, the fastening nut is installed at the tail end of the bolt, and the fastening nut is locked on the outer side wall of the U-shaped purlin.

[0031] Preferably, the locking nut is installed and tightened at the tail end of the bolt, and the locking nut is locked on the fastening nut.

[0032] The application has the advantages and beneficial effects that a connection structure and a connection method of photovoltaic modules and purlins are provided, the size of the module gap can be flexibly adjusted and effectively controlled during installation, the relative position of the module gap and the purlin can also be flexibly adjusted and effectively controlled, the on-site connection of the photovoltaic modules and the purlin is more convenient, the installation error of the U-shaped purlin can be better accommodated, the installation precision of the photovoltaic modules is improved, and the installed connection structure has better waterproof and drainage performance.

[0033] The application has the following characteristics:

[0034] 1) When a pair of photovoltaic modules are installed on both sides of the notched of U-purlin, according to the actual size requirement of the module gap (i.e. the gap of a pair of photovoltaic modules on both sides of the notched of U-purlin) on the installation site, two clamping grooves in a row of clamping grooves on the top surface of the bottom edge of the inverted U-shaped spring are selected, so that the interval of the two clamping grooves completely meets or maximally meets the actual size requirement of the module gap on the installation site; as long as the flash of the module frame of a pair of photovoltaic modules is inserted into the two clamping grooves, the interval of the pair of photovoltaic modules, the module frame and the flash on both sides of the notched of U-purlin completely meets or maximally meets the actual size requirement on the installation site; and for different actual size requirements, two clamping grooves with different intervals (the width of the top surface of the bottom edge of the inverted U-shaped spring is greater than the actual size requirement) can be selected; therefore, the interval of the pair of photovoltaic modules, the module frame and the flash on both sides of the notched of U-purlin can be flexibly adjusted and effectively controlled by the interval of the selected two clamping grooves, which leaves a certain operation space for adjusting the size of the module gap on site, and further makes the on-site connection of the photovoltaic module and the purlin more convenient.

[0035] 2) When two clamping grooves in a row of clamping grooves on the top surface of the bottom edge of the inverted U-shaped spring are selected according to the actual size requirement of a pair of photovoltaic modules on both sides of the notched of U-purlin on the installation site, the two clamping grooves with the interval meeting the actual size requirement may not be the only two, i.e. there may be several pairs of clamping grooves with different positions whose intervals meet the actual size requirement; at this time, the flash of the module frame of a pair of photovoltaic modules can be inserted by selecting one pair of clamping grooves with different positions from the several pairs of clamping grooves with different positions meeting the actual size requirement; and if the flash of the module frame of a pair of photovoltaic modules is inserted into different pairs of clamping grooves with different positions, the position of the gap of the pair of photovoltaic modules in the width direction of the notched of U-purlin (i.e. the width direction of the top surface of the bottom edge of the inverted U-shaped spring) is also different; therefore, the position of the module gap (i.e. the gap of a pair of photovoltaic modules on both sides of the notched of U-purlin) in the width direction of the notched of U-purlin can be flexibly adjusted and effectively controlled by selecting different pairs of clamping grooves with different positions, which leaves a certain operation space for adjusting the position of the module gap on site, so that the installation error of U-purlin in the width direction thereof (i.e. the width direction of the notched of U-purlin) can be better contained, the installation position of the photovoltaic module can be made to be less affected by the installation error of U-purlin itself, and further the installation precision of the photovoltaic module is improved.

[0036] 3) The present application inserts an inverted U-shaped spring in the notch of the U-shaped purlin, and a pair of sides of the inverted U-shaped spring abuts against the two sides of the notch of the U-shaped purlin one by one. The inverted U-shaped spring can be used as a reinforcing piece in the notch of the U-shaped purlin, strengthens the notch of the U-shaped purlin, increases the strength of the notch of the U-shaped purlin, and further maximizes the avoidance of the stress distortion of the notch of the U-shaped purlin during the on-site installation, ensures the smooth implementation of the on-site connection of the photovoltaic module and the purlin, and avoids the influence of the installation precision of the photovoltaic module by the distortion of the notch of the U-shaped purlin.

[0037] 4) The connecting structure of the present application has good waterproof and drainage performance after installation. When it rains, the water flow on the top surface of the photovoltaic module can be collected downward along the flash of the module frame into the notch of the U-shaped purlin, and then the rainwater can be drained along the slope of the U-shaped purlin, such as being guided to the drainage gutter of the main beam along the inner wall of the U-shaped purlin. The U-shaped purlin can act as a drainage groove for the gap of the module, which can effectively drain water. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 is a schematic diagram of the prior art;

[0039] Figures 2 to 5 is a schematic diagram of the present application;

[0040] Figure 6 and Figure 7 is a schematic diagram of the inverted U-shaped spring in the present application;

[0041] Figure 8 is a schematic diagram of the U-shaped purlin in the present application;

[0042] Figure 9 and Figure 10 is a schematic diagram of the module frame in the present application. DETAILED DESCRIPTION

[0043] The specific embodiments of the present application will be further described below in combination with the drawings and examples. The following examples are only used to more clearly illustrate the technical solutions of the present application, and cannot be used to limit the protection scope of the present application.

[0044] The technical solutions of the specific embodiments of the present application are as follows:

[0045] As shown in Figures 2 to 10 , the present application provides a connecting structure of a photovoltaic module 3 and a purlin, comprising: a U-shaped purlin 1 with a notch 11, wherein the notch 11 is arranged upward (the notch 11 and the U-shaped purlin 1 extend in the same direction), a pair of photovoltaic modules 3 respectively arranged on the two sides above the notch 11 of the U-shaped purlin 1 and respectively having a module frame 2, and a connecting assembly connecting the pair of photovoltaic modules 3 and the U-shaped purlin 1 together;

[0046] The component frame 2 of the opposite side of the pair of photovoltaic modules 3 has a flash 21 extending downward into the slot 11 of the U-shaped purlin 1, and the flash 21 extends in the same direction as the slot 11 of the U-shaped purlin 1;

[0047] The connecting assembly comprises a reverse U-shaped clasp 4 inserted into the slot 11 of the U-shaped purlin 1, a bolt 5, a fastening nut 6, and a parallel tightening nut 7;

[0048] The reverse U-shaped clasp 4 is a profiled material, comprising a pair of vertical side edges 41 corresponding to the two sides of the slot 11 of the U-shaped purlin 1, a bottom edge 42 connected to the bottom ends of the pair of side edges 41, and a pair of outwardly turned edges 43 outwardly turned from the top ends of the pair of side edges 41 and abutting against the top surface of the U-shaped purlin 1; the top surface of the bottom edge 42 of the reverse U-shaped clasp 4 is further provided with a row of clamping grooves 44 extending in the same direction as the slot 11 of the U-shaped purlin 1, the clamping grooves 44 are arranged in sequence along the width direction of the slot 11 of the U-shaped purlin 1, and the clamping grooves 44 are uniformly distributed along the width direction of the slot 11 of the U-shaped purlin 1;

[0049] The flash 21 of the component frame 2 of the pair of photovoltaic modules 3 is inserted into two clamping grooves 44 in the row of clamping grooves 44 on the top surface of the bottom edge 42 of the reverse U-shaped clasp 4, and the spacing of the flash 21 of the component frame 2 of the pair of photovoltaic modules 3 is fixed by the two clamping grooves 44;

[0050] The bolt 5 penetrates the flash 21 of the component frame 2 of the pair of photovoltaic modules 3, the pair of side edges 41 of the reverse U-shaped clasp 4, and the two side walls of the U-shaped purlin 1; the flash 21 of the component frame 2 of the pair of photovoltaic modules 3, the pair of side edges 41 of the reverse U-shaped clasp 4, and the two side walls of the U-shaped purlin 1 are respectively provided with through holes for the bolt 5 to penetrate, and the through holes can be threaded through holes matched with the threads of the bolt 5;

[0051] The fastening nut 6 is installed at the tail end of the bolt 5, and the fastening nut 6 is locked on the outer side wall of the U-shaped purlin 1; the fastening nut 6 and the bolt 5 lock the flash 21 of the component frame 2 of the pair of photovoltaic modules 3, the pair of side edges 41 of the reverse U-shaped clasp 4, and the two side walls of the U-shaped purlin 1 together;

[0052] The parallel tightening nut 7 is installed at the tail end of the bolt 5, and the parallel tightening nut 7 is located outside the fastening nut 6 and is locked on the fastening nut 6.

[0053] Specifically:

[0054] As shown in Figure 2 , Figure 3 and Figure 6 , the row of clamping grooves 44 on the top surface of the bottom edge 42 of the reverse U-shaped clasp 4 can have a wave-shaped cross section;

[0055] AsFigure 4 , Figure 5 and Figure 7 As shown, the row of slots 44 on the top surface of the bottom edge 42 of the inverted V-shaped retaining spring 4 can also have a serrated cross-section.

[0056] like Figure 2 , Figure 4 and Figure 9 As shown, the burr 21 can be located at the bottom inner edge of the frame 2 of the component in which it is located;

[0057] like Figure 3 , Figure 5 and Figure 10 As shown, the burr 21 can also be located at the bottom outer edge of the frame 2 of its component; and as... Figure 3 and Figure 5 As shown, if the flash 21 is located at the bottom outer edge of the component frame 2, the component frames 2 on opposite sides of a pair of photovoltaic modules 3 can press against one pair of flanges 43 of the inverted V-shaped retaining spring 4.

[0058] More specifically:

[0059] The connecting components can be two or more, and the two or more connecting components are arranged sequentially along the extension direction of the U-shaped purlin 1 groove 11; if there are multiple connecting components, the multiple connecting components can be arranged sequentially at equal intervals along the extension direction of the U-shaped purlin 1 groove 11.

[0060] The application further provides a connecting method of the connecting structure, comprising the following steps: arranging the notched groove 11 of the U-shaped purlin 1 upwards; inserting the inverted U-shaped clasp 4 into the notched groove 11 of the U-shaped purlin 1, so that the inverted U-shaped clasp 4 and the notched groove 11 of the U-shaped purlin 1 extend in the same direction (the inverted U-shaped clasp 4 and the notched groove 11 of the U-shaped purlin 1 extend in the same direction through the row of clamping grooves 44 on the top surface of the bottom edge 42 of the inverted U-shaped clasp 4, and the row of clamping grooves 44 are arranged along the width direction of the notched groove 11 of the U-shaped purlin 1), so that the pair of side edges 41 of the inverted U-shaped clasp 4 abut against the two sides of the notched groove 11 of the U-shaped purlin 1 one by one, and the pair of outward turning edges 43 of the inverted U-shaped clasp 4 abut against the top surface of the U-shaped purlin 1 respectively; selecting two clamping grooves 44 in the row of clamping grooves 44 on the top surface of the bottom edge 42 of the inverted U-shaped clasp 4, inserting the flashing 21 of the component frame 2 of the pair of photovoltaic modules 3 into the two clamping grooves 44 respectively, and adjusting and controlling the distance between the pair of photovoltaic modules 3 / the component frame 2 through the distance between the two clamping grooves 44 (the distance between the flashing 21 of the component frame 2 of the pair of photovoltaic modules 3 is limited and fixed by the two clamping grooves 44); penetrating the flashing 21 of the component frame 2 of the pair of photovoltaic modules 3, the pair of side edges 41 of the inverted U-shaped clasp 4 and the through holes of the side walls on the two sides of the U-shaped purlin 1 by the bolt 5, installing the fastening nut 6 on the tail end of the bolt 5, and locking the fastening nut 6 on the outer side wall of the U-shaped purlin 1; locking the flashing 21 of the component frame 2 of the pair of photovoltaic modules 3, the pair of side edges 41 of the inverted U-shaped clasp 4 and the side walls on the two sides of the U-shaped purlin 1 together by the fastening nut 6 and the bolt 5; installing and locking the nut 7 on the tail end of the bolt 5, and locking the nut 7 on the fastening nut 6.

[0061] More specifically, if the flashing 21 is located at the outer edge of the bottom end of the component frame 2, when the pair of photovoltaic modules 3 are installed on the U-shaped purlin 1, the component frames 2 on the opposite sides of the pair of photovoltaic modules 3 are pressed on the pair of outward turning edges 43 of the inverted U-shaped clasp 4.

[0062] The above only describes the preferred embodiments of the application, and it should be noted that those skilled in the art can make some improvements and refinements without departing from the technical principles of the application, and these improvements and refinements should also be considered as the protection scope of the application.

Claims

1. A connection structure between a photovoltaic module and a purlin, comprising: A U-shaped purlin with a slot facing upwards, a pair of photovoltaic modules respectively disposed on both sides above the slot of the U-shaped purlin and each having a module frame, and a connecting component connecting the pair of photovoltaic modules to the U-shaped purlin; characterized in that: The frame edges of the pair of photovoltaic modules on opposite sides each have burrs extending downward into the U-shaped purlin groove; The connecting assembly includes: an inverted V-shaped retaining spring that snaps into the U-shaped purlin groove, and a bolt; The inverted V-shaped retaining spring includes: a pair of side edges that correspond to and abut against the two sides of the U-shaped purlin groove, a bottom edge that connects to the bottom end of the pair of side edges at both ends, and an outwardly turned edge that abuts against the top surface of the U-shaped purlin from the top of the pair of side edges; the top surface of the bottom edge of the inverted V-shaped retaining spring is also provided with a row of retaining grooves, which extend in the same direction as the groove of the U-shaped purlin and are arranged sequentially along the width direction of the U-shaped purlin groove; The flash of the frame of the pair of photovoltaic modules is inserted into two slots in a row of slots on the top surface of the bottom edge of the inverted V-shaped retaining spring, and the spacing of the flash of the frame of the pair of photovoltaic modules is limited and fixed by the two slots. The bolt passes through the flash of the frame of a pair of photovoltaic modules, the pair of sides of the inverted V-shaped retaining spring, and the two side walls of the U-shaped purlin, and the bolt locks the flash of the frame of a pair of photovoltaic modules, the pair of sides of the inverted V-shaped retaining spring, and the two side walls of the U-shaped purlin together.

2. The connection structure between the photovoltaic module and the purlin according to claim 1, characterized in that, The burr is located at the bottom inner edge of the frame of the component it belongs to.

3. The connection structure between the photovoltaic module and the purlin according to claim 1, characterized in that, The burr is located at the bottom outer edge of the frame of the component it belongs to.

4. The connection structure between the photovoltaic module and the purlin according to claim 3, characterized in that, The frame edges of the pair of photovoltaic modules on opposite sides are pressed against the outer flange of the inverted V-shaped retaining spring.

5. The connection structure between the photovoltaic module and the purlin according to claim 1, characterized in that, A row of slots on the top surface of the bottom edge of the inverted V-shaped retaining spring is evenly distributed along the width direction of the U-shaped purlin slot.

6. The connection structure between the photovoltaic module and the purlin according to claim 5, characterized in that, The row of slots on the top surface of the bottom edge of the inverted V-shaped retaining spring has a wavy cross-section.

7. The connection structure between the photovoltaic module and the purlin according to claim 5, characterized in that, The row of slots on the top surface of the bottom edge of the inverted V-shaped retaining spring has a serrated cross-section.

8. The connection structure between the photovoltaic module and the purlin according to claim 1, characterized in that, The frame of the pair of photovoltaic modules, the two sides of the inverted V-shaped retaining spring, and the two side walls of the U-shaped purlin are respectively provided with through holes for bolts to pass through.

9. The connection structure between the photovoltaic module and the purlin according to claim 8, characterized in that, The through hole is a threaded through hole that mates with the bolt thread.

10. The connection structure between the photovoltaic module and the purlin according to claim 1, characterized in that, The connecting assembly further includes a fastening nut installed at the tail end of the bolt; and the fastening nut is locked onto the outer wall of the U-shaped purlin.

11. The connection structure between the photovoltaic module and the purlin according to claim 10, characterized in that, The connecting assembly further includes: a tightening nut installed at the tail end of the bolt and located outside the fastening nut; and the tightening nut is locked onto the fastening nut.

12. The connection structure between the photovoltaic module and the purlin according to any one of claims 1 to 11, characterized in that, The connecting components are two or more, and the two or more connecting components are arranged sequentially along the extension direction of the U-shaped purlin groove.

13. The connection structure between the photovoltaic module and the purlin according to any one of claims 1 to 11, characterized in that, The multiple connecting components are arranged at equal intervals along the extension direction of the U-shaped purlin groove.

14. A connection method for the connection structure according to any one of claims 1 to 13, characterized in that, When installing a pair of photovoltaic modules on a U-shaped purlin, select two slots from the row of slots on the top surface of the bottom edge of the inverted V-shaped retaining spring. Insert the burrs of the frame of the pair of photovoltaic modules into the two slots respectively, and adjust the spacing of the pair of photovoltaic modules by adjusting the spacing of the two selected slots.

15. The connection method according to claim 14, characterized in that, Includes the following steps: Insert the inverted V-shaped retaining ring into the slot of the U-shaped purlin, ensuring that the two sides of the inverted V-shaped retaining ring align with the two sides of the slot of the U-shaped purlin, and that the two outer flanges of the inverted V-shaped retaining ring align with the top surface of the U-shaped purlin. Select two slots from the row of slots on the top surface of the bottom edge of the inverted V-shaped retaining ring, and insert the flash of the frame of a pair of photovoltaic modules into these two slots respectively. Adjust the spacing of the pair of photovoltaic modules by adjusting the spacing between the two selected slots. Insert bolts through the flash of the frame of a pair of photovoltaic modules, the two sides of the inverted V-shaped retaining ring, and the two side walls of the U-shaped purlin, and lock the flash of the frame of a pair of photovoltaic modules, the two sides of the inverted V-shaped retaining ring, and the two side walls of the U-shaped purlin together using bolts.

16. The connection method according to claim 15, characterized in that, If the flash is located at the bottom outer edge of the frame of the component it belongs to, then when installing a pair of photovoltaic modules on the U-shaped purlin, the frame of the opposite side of the pair of photovoltaic modules is pressed against the outer flange of the inverted V-shaped retaining spring.

17. The connection method according to claim 15, characterized in that, Install a fastening nut at the end of the bolt and lock the fastening nut onto the outer wall of the U-shaped purlin.

18. The connection method according to claim 17, characterized in that, Install and tighten the nut at the end of the bolt, and lock the nut onto the fastening nut.

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