Photovoltaic frame fixing device

Abstract

The utility model discloses a photovoltaic frame fixing device, which is used for vertically fixing a horizontal extension plate at the bottom of a photovoltaic frame to a purline, and comprises a supporting plate, a fixing plate, a fixing plate and a fixing device, and the supporting plate is vertically located above the extension plate and is vertical to the purline; the two vertical plates are parallel to each other, are perpendicular to the extension plate in a spaced mode and are parallel to the purline, a clamping groove allowing the extension plate to be inserted therein is formed in each vertical plate, and the side edges of the parts, located above the clamping grooves, of the two vertical plates are perpendicularly connected with the two ends of the supporting plate correspondingly; the parts, located below the clamping grooves, of the two vertical plates are located on the two sides of the purline in the width direction respectively and connected with the purline. According to the photovoltaic frame fixing device, the photovoltaic frame can be prevented from inclining towards the inner side due to stress, the fixing effect of the photovoltaic frame and the capacity of bearing loads in the vertical direction are improved, and the risks that a photovoltaic module is blown away, damaged and the like are avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of photovoltaic technology, in particular to a photovoltaic frame fixing device. BACKGROUND

[0002] At present, photovoltaic power generation occupies an increasingly important position in the energy supply system, and more and more large-scale photovoltaic ground power stations are built. Since photovoltaic modules need to serve in outdoor environment for a long time, strong wind will form wind pressure on the surface of photovoltaic modules when severe weather comes. However, the common installation methods of photovoltaic frame of photovoltaic modules mainly include block installation and bolt installation. Under the challenge of extreme environment, the photovoltaic frame is installed by pressing block against the top of the photovoltaic frame, which is easy to cause the photovoltaic frame to be blown away due to the disengagement of the block from the top of the photovoltaic frame, and the installation hole of the photovoltaic frame is also easy to be sheared and damaged when the photovoltaic frame is installed by bolt through the installation hole of the photovoltaic frame, thereby the safety and reliability are low, and the increasingly high demand cannot be met. CONTENT OF THE UTILITY MODEL

[0003] The purpose of the present application is to provide a photovoltaic frame fixing device for vertically fixing the horizontally extending plate at the bottom of the photovoltaic frame to the purlin, preventing the photovoltaic frame from being inclined inwardly under stress, improving the fixing effect of the photovoltaic frame and the ability to bear vertical load, and avoiding the risk of the photovoltaic module being blown away, damaging the photovoltaic module, etc.

[0004] In order to solve at least one of the above technical problems, the technical scheme of the present application is as follows:

[0005] The photovoltaic frame fixing device provided by the embodiment of the present application is used for vertically fixing the horizontally extending plate at the bottom of the photovoltaic frame to the purlin, and the photovoltaic frame fixing device comprises: a support plate vertically located above the extending plate and perpendicular to the purlin; two vertical plates vertically located perpendicular to the extending plate and parallel to the purlin and spaced apart from each other, each vertical plate is provided with a clamping groove for inserting the extending plate, wherein the side edges of the portions of the two vertical plates above the clamping grooves are respectively connected vertically to the two ends of the support plate, and the portions of the two vertical plates below the clamping grooves are respectively located on the two sides of the purlin in the width direction and connected with the purlin.

[0006] In a possible implementation of the above embodiment, the upper end faces of the two clamping grooves are flush with the bottom face of the support plate.

[0007] In a possible implementation of the above embodiment, the photovoltaic frame fixing device of the present application further comprises: a protective backing plate, which is parallel to the top face of the extending plate and inserted into the clamping grooves in the two vertical plates together with the extending plate.

[0008] In a possible implementation of the above-described embodiment, the two ends of the protection base plate are respectively provided with positioning blocks, and the two vertical plates are located between the two positioning blocks and abut against the inner side walls of the corresponding positioning blocks.

[0009] In a possible implementation of the above-described embodiment, the top edge of the part of each vertical plate located above the clamping groove is inclined downward from one end connected to the support plate to the other end.

[0010] In a possible implementation of the above-described embodiment, the photovoltaic frame fixing device further comprises a connecting mechanism, and the two vertical plates are connected to the purlin through the connecting mechanism.

[0011] In a possible implementation of the above-described embodiment, the bottom of each vertical plate is vertically provided with a first horizontal plate extending away from the purlin, and the two ends of the connecting mechanism in the width direction of the purlin are respectively connected to the two first horizontal plates through fasteners, so as to realize the connection of the two vertical plates to the purlin.

[0012] In a possible implementation of the above-described embodiment, the fastener is a bolt, and the ends of the two first horizontal plates away from each other are respectively provided with a limiting block, and each limiting block is used to limit the rotation of the head of the corresponding bolt or the locking nut on the bolt.

[0013] In a possible implementation of the above-described embodiment, the connecting mechanism comprises a U-shaped body embracing the purlin from below and two second horizontal plates vertically arranged at the ends of the U-shaped body, and the second horizontal plates correspond to the first horizontal plates and are connected through bolts.

[0014] In a possible implementation of the above-described embodiment, the connecting mechanism is formed as a flat plate structure penetrating the purlin along the width direction of the purlin, and the two ends of the connecting mechanism extending out of the purlin are respectively connected to the two first horizontal plates corresponding to each other through bolts.

[0015] The above technical solutions of the present application have at least one of the following beneficial effects:

[0016] The photovoltaic frame fixing device according to the application comprises a support plate and two vertical plates, the support plate is vertically located above the extension plate and is perpendicular to the purlin, the two vertical plates are parallel to each other and are vertically arranged on the extension plate and are parallel to the purlin, a clamping groove for inserting the extension plate is arranged on each vertical plate, the side edges of the portions of the two vertical plates above the clamping grooves are respectively connected to the two ends of the support plate perpendicularly, and the portions of the two vertical plates below the clamping grooves are respectively located on the two sides of the purlin in the width direction and are connected to the purlin, so as to vertically fix the horizontal extension plate at the bottom of the photovoltaic frame to the purlin. In this way, on the one hand, the side wall of the photovoltaic frame close to the extension plate can be supported by the support plate, so as to prevent the photovoltaic frame from being inclined inwardly under force, and the two vertical plates also improve the structural strength of the support plate and enhance the supporting effect of the support plate, on the other hand, the clamping groove on each vertical plate clamps the extension plate of the photovoltaic frame, and the extension plate of the photovoltaic frame is pressed downward by the vertical plate, so as to improve the fixing effect of the photovoltaic frame and the ability to bear the vertical load, the portions of the two vertical plates below the clamping grooves are respectively located on the two sides of the purlin in the width direction and are connected to the purlin, so as to conveniently and quickly avoid the risk of the photovoltaic module being blown away and damaging the photovoltaic module, and the safety, stability and reliability are high, the service life is prolonged, and the increasingly high demand can be met, and the photovoltaic frame is better applicable to bad weather such as wind and snow.

[0017] In addition, in the technical scheme of the application, any unexplained part can be realized by using conventional means in the art. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the specific embodiments of the application or the technical scheme in the prior art, the drawings needed in the following specific embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the application, and those skilled in the art can also obtain other drawings according to these drawings without creating any creative labor.

[0019] Figure 1 The structural schematic view of the photovoltaic frame fixing device according to an embodiment of the application;

[0020] Figure 2 The front view of the photovoltaic frame fixing device according to an embodiment of the application;

[0021] Figure 3 The side view of the photovoltaic frame fixing device according to an embodiment of the application;

[0022] Figure 4 The structural schematic view of the photovoltaic frame fixing device according to an embodiment of the application;

[0023] Figure 5A front view of a photovoltaic frame fixing device according to an embodiment of the present application;

[0024] Figure 6 A side view of a photovoltaic frame fixing device according to an embodiment of the present application;

[0025] Figure 7 A partial structural schematic view of a photovoltaic frame fixing device according to an embodiment of the present application;

[0026] Figure 8 A structural schematic view of a protective pad according to an embodiment of the present application.

[0027] Explanation of reference numerals in the drawings:

[0028] Support plate 100;

[0029] Stand plate 200; clamping groove 210;

[0030] First horizontal plate 300; first connecting hole 310;

[0031] Limiting block 400;

[0032] Connecting mechanism 500; U-shaped body 510; second horizontal plate 520;

[0033] Fastener 600; locking nut 610;

[0034] Protective pad 700; positioning block 710;

[0035] Photovoltaic frame 800; extension plate 810;

[0036] Purlin 900; through hole 910. DETAILED DESCRIPTION

[0037] In order to make the purposes, technical solutions and advantages of the present application clearer, the present application is further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are part of the embodiments of the present application, rather than all the embodiments, and are used to explain the present application, but not to limit the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0038] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "inner", "outer", "two ends", "two sides", "bottom", "top" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the elements referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "superior", "inferior", "primary", "secondary" and the like are only for descriptive purposes and can simply be used to more clearly distinguish different components, and cannot be understood as indicating or implying relative importance.

[0039] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0040] Referring to Figures 1-8 As shown, the photovoltaic frame fixing device provided by the embodiment of the present application is shown schematically, which is used to fix the extension plate 810 horizontally extended at the bottom of the photovoltaic frame 800 vertically to the purlin 900. The photovoltaic frame fixing device can include a support plate 100 and two vertical plates 200.

[0041] Wherein, the support plate 100 is vertically located above the extension plate 810 and perpendicular to the purlin 900, the photovoltaic frame 800 can at least include a horizontal extension plate 810 extending along the length direction and a side wall vertically located above the extension plate 810, that is, the support plate 100 is arranged parallel to the side wall of the photovoltaic frame 800, so that the support plate 100 can support the side wall of the photovoltaic frame 800 close to the extension plate 810, and the two vertical plates 200 are parallel and spaced apart, perpendicular to the extension plate 810 and parallel to the purlin 900, and each vertical plate 200 is provided with a clamping groove 210 for inserting the extension plate 810. The side edges of the portions of the two vertical plates 200 above the clamping grooves 210 are respectively connected vertically to the two ends of the support plate 100, and the portions of the two vertical plates 200 below the clamping grooves 210 are respectively located on both sides of the purlin 900 in the width direction and connected with the purlin 900.

[0042] It should be noted that the frame of the photovoltaic module is usually a rectangular frame structure, the rectangular frame surrounds the photovoltaic laminated plate of the photovoltaic module, the side of the photovoltaic frame 800 close to the center of the photovoltaic module is the inner side, and the side of the photovoltaic frame 800 close to the center of the photovoltaic module is provided with an extension plate 810, and the bottom surface of the photovoltaic frame 800 and the bottom surface of the extension plate 810 are both pressed against the corresponding purlin 900 for installation.

[0043] When installing the photovoltaic frame 800, the photovoltaic frame 800 and the photovoltaic frame fixing device of the application are placed on the purlin 900, the bottom surface of the photovoltaic frame 800 and the bottom surface of the extension plate 810 are both pressed against the upper surface of the purlin 900, the support plate 100 can support the side wall of the photovoltaic frame 800 close to the extension plate 810, the portions of the two vertical plates 200 below the clamping grooves 210 are respectively located on both sides of the purlin 900 in the width direction, the clamping grooves 210 on each vertical plate 200 clamp the extension plate 810 of the photovoltaic frame 800, and then the portions of the two vertical plates 200 below the clamping grooves 210 are respectively connected with the purlin 900, so that the photovoltaic frame 800 is stably installed on the purlin 900. In addition, the top of the support plate 100 should be lower than the lower plane of the mounting groove on the photovoltaic frame 800 for mounting the photovoltaic laminated plate, to prevent the top of the support plate 100 from contacting the photovoltaic laminated plate, etc.

[0044] Therefore, according to the photovoltaic frame fixing device of the application, on the one hand, when the photovoltaic frame 800 is subjected to the inward pulling force caused by the bending of the photovoltaic laminated plate, the support plate 100 can support the side wall of the photovoltaic frame 800 close to the extension plate 810, preventing the photovoltaic frame 800 from tilting inwardly under stress, limiting the inward sliding of the photovoltaic frame 800 under stress, and the side edges of the portions of the two vertical plates 200 above the clamping grooves 210 are respectively connected with the two ends of the support plate 100 vertically, which also improves the structural strength of the support plate 100 and enhances the supporting effect of the support plate 100. On the other hand, the clamping grooves 210 on each vertical plate 200 clamp the extension plate 810 of the photovoltaic frame 800, and the vertical plate 200 exerts downward pressure on the extension plate 810 of the photovoltaic frame 800, improving the fixing effect of the photovoltaic frame 800 and the ability to withstand vertical loads, and also limiting the inward sliding of the photovoltaic frame 800 under stress. The portions of the two vertical plates 200 below the clamping grooves 210 are respectively located on both sides of the purlin 900 in the width direction and connected with the purlin 900, which is convenient and fast to operate, thereby avoiding the risk of the photovoltaic module being blown away, damaging the photovoltaic module, etc., having high safety, stability and reliability, prolonging the service life, and being able to meet the increasingly high demand and better adapt to harsh weather such as wind and snow.

[0045] In some embodiments, referring to Figures 1-7As shown, the upper end faces of the two clamping grooves 210 are flush with the bottom face of the support plate 100. Thus, the bottom face of the support plate 100 can also be pressed against the extension plate 810, the structure is more stable, and better fixation of the photovoltaic frame 800 to the purlin 900 is ensured.

[0046] In some embodiments, referring to Figures 1-6 As shown, the photovoltaic frame fixing device of the present application further comprises a protective pad plate 700. The protective pad plate 700 is parallel to the top face of the extension plate 810 and is inserted into the clamping grooves 210 on the two upright plates 200 together with the extension plate 810, that is, the protective pad plate 700 abuts against the top face of the extension plate 810, and the top face of the protective pad plate 700 abuts against the upper end faces of the two clamping grooves 210, respectively. Thus, the contact area with the extension plate 810 can be increased by the protective pad plate 700, local stress concentration is prevented, the fastening effect is enhanced, and wear on the surface of the photovoltaic frame 800 is reduced, etc.

[0047] Further, referring to Figure 2 、 5 , 8, the two ends of the protective pad plate 700 are respectively provided with positioning blocks 710, the two upright plates 200 are located between the two positioning blocks 710, and each upright plate 200 abuts against the inner side wall of the corresponding positioning block 710. Thus, the protective pad plate 700 is prevented from sliding relative to the clamping grooves 210 in a direction perpendicular to the upright plates 200 by the two positioning blocks 710, the structure is more stable, and the safety and reliability are higher.

[0048] Further, the two positioning blocks 710 are symmetrically arranged and can be integrally formed with the protective pad plate 700. Thus, the structural strength is improved, the structure is more stable and reliable, and the service life is longer.

[0049] In some embodiments, referring to Figures 1-6 As shown, the two upright plates 200 are symmetrically arranged, the distance between the portions of the two upright plates 200 below the clamping grooves 210 is substantially consistent with the width of the purlin 900, and the portions of the two upright plates 200 below the clamping grooves 210 are parallel to the side walls of the respective purlins 900. Thus, better connection of the two upright plates 200 to the purlins 900 is ensured, the structure is more stable, and the two upright plates 200 are facilitated to clamp the extension plate 810.

[0050] In some embodiments, referring to Figure 1 、 3 , 4, 6, 7, the top edge of the portion of each upright plate 200 above the clamping groove 210 is downwardly inclined from one end connected to the support plate 100 to the other end. Thus, contact of the upright plate 200 with the stress-bent photovoltaic laminated plate is prevented from causing explosion, etc.

[0051] In some embodiments, referring to Figure 7As shown, the two vertical plates 200 can be integrally formed with the support plate 100. In this way, the structural strength is improved, and the device is more stable, reliable, and has a longer service life.

[0052] In some embodiments, referring to Figures 1-6 As shown, the photovoltaic frame fixing device also includes a connecting mechanism 500. The two vertical plates 200 are connected to the purlin 900 through the connecting mechanism 500, and the connecting mechanism 500 is located below the two vertical plates 200 and perpendicular to the purlin 900. In this way, the two vertical plates 200 are connected to the purlin 900 through the connecting mechanism 500, thereby stably mounting the photovoltaic frame 800 on the purlin 900.

[0053] Further, referring to Figures 1-6 As shown, the bottom of each vertical plate 200 is vertically provided with a first horizontal plate 300 extending away from the purlin, and the two ends of the connecting mechanism 500 in the width direction of the purlin 900 are respectively connected to the two first horizontal plates 300 through fasteners 600, thereby connecting the two vertical plates 200 to the purlin 900. The heights of the two first horizontal plates 300 are consistent, each first horizontal plate 300 is perpendicular to the corresponding vertical plate 200, and each first horizontal plate 300 is provided with a first connecting hole 310 for the fastener 600 to pass through. In this way, the connection is more convenient and fast.

[0054] In some embodiments, referring to Figures 1-7 As shown, the fastener 600 is a bolt, each fastener 600 is provided with a locking nut 610, and the ends of the two first horizontal plates 300 away from each other are respectively provided with a limiting block 400, each limiting block 400 is used to limit the rotation of the head of the corresponding bolt or the locking nut 610 on the bolt. In this way, the bolt rotates and the locking nut 610 does not move, or the bolt does not move and the locking nut 610 rotates, preventing the locking nut 610 from rotating together with the bolt during installation or disassembly, and the operation is more simple and convenient.

[0055] Further, referring to Figures 1-7As shown, each limiting block 400 is used to limit the rotation of the locking nut 610 on the corresponding bolt, the locking nut 610 is located between the corresponding limiting block 400 and the vertical plate 200, the head of the bolt is downward, the fastener 600 can adopt a hexagonal head bolt, the locking nut 610 can be a hexagonal nut, the limiting block 400 can be parallel to the corresponding vertical plate 200, the vertical distance between the limiting block 400 and the center of the first connecting hole 310 is greater than the inscribed circle radius of the hexagonal nut and less than the circumscribed circle radius of the hexagonal nut. Thus, the limiting block 400 limits the rotation of the locking nut 610, preventing the locking nut 610 from rotating with the bolt, making the operation more convenient and fast, improving the installation and disassembly speed, etc. In addition, the locking nut 610 can also adopt a square nut or other non-circular nut. For a square nut, the distance between the limiting block 400 and the vertical plate 200 is slightly greater than the width of the square nut.

[0056] Further, each limiting block 400 is used to limit the rotation of the head of the corresponding bolt, the head of the bolt is upward and located between the corresponding limiting block 400 and the vertical plate 200, the fastener 600 can adopt a hexagonal head bolt, the locking nut 610 can be a hexagonal nut, the distance between the limiting block 400 and the vertical plate 200 is less than the maximum width of the head of the bolt and greater than the minimum width of the head of the bolt. Thus, the limiting block 400 limits the rotation of the head of the bolt, preventing the locking nut 610 from rotating with the bolt, making the operation more convenient and fast, improving the installation and disassembly speed, etc. In addition, the head of the bolt can also adopt a square or other non-circular shape. For a square bolt, the distance between the limiting block 400 and the vertical plate 200 is slightly greater than the width of the head of the bolt.

[0057] In some embodiments, referring to Figure 7 As shown, the vertical plate 200 is integrally formed with the corresponding first horizontal plate 300 and limiting block 400. That is, the support plate 100, the vertical plate 200, the first horizontal plate 300 and the limiting block 400 are integrally formed, thereby the structure is more stable, the stability and reliability are higher, the service life is longer, the processing and manufacturing are more convenient, the cost is reduced, etc.

[0058] In some embodiments, referring to Figures 1-3As shown, the connecting mechanism 500 comprises a U-shaped body 510 embracing the purlin 900 from below and two second horizontal plates 520 vertically arranged at the ends of the U-shaped body 510 respectively, the second horizontal plates 520 correspond to the first horizontal plates 300 and are connected by bolts. Among them, the two second horizontal plates 520 are perpendicular to the U-shaped body 510 respectively, the second horizontal plates 520 are parallel to the first horizontal plates 300, the heights of the two first horizontal plates 300 are consistent, the heights of the two second horizontal plates 520 are consistent, and each second horizontal plate 520 is provided with a hole body (not shown) corresponding to the first connecting hole 310. That is, the U-shaped body 510 and the two second horizontal plates 520 form a clamp structure, the connecting mechanism 500 adopts the clamp structure, when the connecting mechanism 500 is connected with the two first horizontal plates 300, the groove of the U-shaped body 510 clamps the lower end of the purlin 900, the two second horizontal plates 520 cooperate with the two first horizontal plates 300 respectively, then bolts are respectively passed through the first connecting hole 310 on each first horizontal plate 300 and the hole body on the corresponding second horizontal plate 520, and are fastened by the locking nut 610 on each fastener 600, so as to connect the connecting mechanism 500 with the two first horizontal plates 300, so that the two vertical plates 200 apply pressing force to the extension plate 810, so that the photovoltaic frame 800 is stably installed on the purlin 900. Thus, the operation is more simple and fast, and it is convenient for installation, disassembly and adjustment, etc.

[0059] In some embodiments, referring to Figures 4-6As shown, the connecting mechanism 500 is formed as a flat plate structure penetrating the purlin 900 along the width direction of the purlin 900, and the two ends of the connecting mechanism 500 extending out of the purlin 900 are respectively connected with the two first horizontal plates 300 corresponding to each other through bolts. Wherein, the purlin 900 is provided with a through hole 910 penetrating along the width direction thereof, the connecting mechanism 500 passes through the through hole 910 and the two ends thereof extend out of the purlin 900 respectively, the connecting mechanism 500 is provided with a second connecting hole (not shown in the figure) corresponding to the first connecting hole 310 one by one, the heights of the two first horizontal plates 300 are consistent, the connecting mechanism 500 is located below the two first horizontal plates 300 and is parallel to the two first horizontal plates 300, a certain gap can be left between the connecting mechanism 500 and the first horizontal plates 300, which is convenient for the connection and adjustment of the bolts, etc. When the connecting mechanism 500 is connected with the two first horizontal plates 300, the connecting mechanism 500 first passes through the through hole 910 on the purlin 900 and the two ends thereof extend out of the purlin 900 respectively, then the bolts pass through the first connecting hole 310 on each first horizontal plate 300 and the corresponding second connecting hole on the connecting mechanism 500 respectively, and are fastened through the locking nuts 610 on each fastener 600, so as to connect the connecting mechanism 500 with the two first horizontal plates 300, so that the two vertical plates 200 apply a pressing force to the extension plate 810, so that the photovoltaic frame 800 is stably installed on the purlin 900. Thus, the operation is more simple and fast, the connecting mechanism 500 adopts a flat plate structure, which is convenient for processing and manufacturing, reduces the cost, and the through hole 910 can prevent the connecting mechanism 500 from moving along the length direction of the purlin 900, thereby preventing the photovoltaic frame 800 from moving along the length direction of the purlin 900, and the safety and stability are higher.

[0060] Based on the above embodiments of the present application, the technical features of one of the embodiments can be beneficially combined with one or more of the other embodiments without explicit negation or conflict.

[0061] The above only describes some embodiments of the present application, which are used to illustrate the technical solutions of the present application, but not to limit them, and it should be understood that for those skilled in the art, without departing from the creative concept of the present application, the above description can be improved or replaced, and all these improvements and replacements should belong to the protection scope of the appended claims of the present application. In this case, all details can be replaced by equivalent elements, and the materials, shapes and sizes can be arbitrary.

Claims

1. A photovoltaic frame fixing device for fixing a horizontally extending plate of a photovoltaic frame bottom perpendicularly to a purlin, characterized in that, The photovoltaic frame fixing device comprises: a support plate vertically positioned above the extension plate and perpendicular to the purlin; two vertical plates parallel and spaced apart from each other, vertically positioned perpendicular to the extension plate and parallel to the purlin, each of the vertical plates is provided with a clamping groove for inserting the extension plate, wherein the side edges of the portions of the two vertical plates above the clamping grooves are respectively connected vertically to the two ends of the support plate, and the portions of the two vertical plates below the clamping grooves are respectively positioned on both sides of the purlin in the width direction and connected with the purlin.

2. The photovoltaic frame securing device of claim 1, wherein, The upper end faces of the two clamping grooves are flush with the bottom face of the support plate.

3. The photovoltaic frame securing device of claim 1, wherein, Further comprising: a protective pad plate parallel positioned on the top face of the extension plate and inserted into the clamping grooves on the two vertical plates together with the extension plate.

4. The photovoltaic frame securing device of claim 3, wherein, The two ends of the protective pad plate are respectively provided with positioning blocks, and the two vertical plates are positioned between the two positioning blocks and abut against the inner side walls of the corresponding positioning blocks.

5. The photovoltaic frame securing device of claim 1, wherein, The top edges of the portions of each vertical plate above the clamping groove are downwardly inclined from one end connected with the support plate to the other end.

6. The photovoltaic frame securing device of claim 1, wherein, Further comprising: a connecting mechanism for connecting the two vertical plates with the purlin, the connecting mechanism is positioned below the two vertical plates and perpendicular to the purlin.

7. The photovoltaic frame securing device of claim 6, wherein, The bottom of each vertical plate is vertically provided with a first horizontal plate extending away from the purlin, and the two ends of the connecting mechanism in the width direction of the purlin are respectively connected with the two first horizontal plates through fasteners, thereby achieving the connection of the two vertical plates with the purlin.

8. The photovoltaic frame securing device of claim 7, wherein, The fastener is a bolt, and the ends of the two first horizontal plates away from each other are respectively provided with a limiting block, and each limiting block is used for limiting the rotation of the head of the corresponding bolt or the locking nut on the bolt.

9. The photovoltaic frame securing device of claim 8, wherein, The connecting mechanism comprises a U-shaped body embracing the purlin from below and two second horizontal plates vertically provided at the ends of the U-shaped body, respectively, the second horizontal plates correspond to the first horizontal plates and are connected through the bolts.

10. The photovoltaic frame securing device of claim 8, wherein, The connecting mechanism is formed as a flat plate structure penetrating through the purlin along the width direction of the purlin, and the two ends of the connecting mechanism protruding out of the purlin are respectively connected with the two first horizontal plates corresponding to each other through the bolts.

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