Safe unwinding device for photovoltaic support raw materials

Abstract

The utility model discloses a photovoltaic support raw material safety unwinding device which comprises a frame, the frame is composed of a front set of bottom supporting rods and a rear set of bottom supporting rods which are symmetrically arranged and connected through supporting longitudinal beams, and vertical fixing blocking rods are symmetrically and fixedly arranged on the top faces of the bottom supporting rods. One or more groups of vertical adjusting gear levers are arranged on the bottom supporting rod between the vertical fixing gear levers, and the bottom supporting rod, the supporting longitudinal beam, the vertical fixing gear levers and the vertical adjusting gear levers are matched to form a limiting containing space for placing the reel steel. The unforeseen circumstances such as rolling, lateral inclination and the like in the uncoiling process of the reel steel can be prevented, and potential safety hazards are reduced; and the hoisting operation after the coil steel is uncoiled is also facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to photovoltaic power generation support production technical field especially relates to a kind of photovoltaic support raw material safety unwinding device. BACKGROUND

[0002] Photovoltaic support is the special equipment designed and installed in solar photovoltaic power generation system to support, fix, rotate photovoltaic module and solar cell panel. General photovoltaic support is composed of C-shaped steel, stand, support etc. Among them, C-shaped section such as inclined beam, purline, inclined strut accounts for about 65% of the whole, and the above three main materials are manufactured by coiled steel material as photovoltaic support raw material. To ensure production efficiency to meet the demand of mass production, coiled steel material as photovoltaic support raw material is unwound by coiled plate feeding unwinding. At the same time, coiled steel material is a material commonly used in fields such as building, manufacturing, transportation and energy, and its characteristics are heavy weight, long length and complex shape, so the safety problem in use is extremely important.

[0003] The utility model discloses a kind of split shearing steel coil material rack for placing, including placing plate, be located on the limiting slot of placing plate, placing plate both sides have the limiting mechanism of opposite arrangement, limiting mechanism includes the support frame of being placed in the side of placing plate, rotatable be located on the limiting rod of support frame, when coil material is placed in limiting slot, limiting rod rotates and enters the side center position of coil material;Limiting slot both sides are oppositely provided with guide mechanism, guide mechanism includes the recess of being opened in the side of limiting slot, the guide block of being movably located in recess, the side of guide block close to coil material is provided with arc concave surface. Recess bottom is provided with moving groove, moving block is movably located in moving groove, and moving block is connected with guide block. Recess bottom is provided with moving groove, moving block is movably located in moving groove, and moving block is connected with guide block. The above-mentioned technology can increase the safety when coil material is placed.

[0004] When the above-mentioned technical scheme is used to unload coil material, the guide block needs to be moved along the recess to the coil material position, and then the coil material is rolled to the direction of the guide block through the arc concave surface on one side of the guide block. However, during the rolling process of the coil material, the coil material may roll away from the limiting slot area along the arc concave surface, which has safety hazards and is easy to cause safety accidents. SUMMARY

[0005] The utility model discloses a kind of photovoltaic support raw material safety unwinding device, can prevent the rolling side skew and other accidents during the unwinding process of coiled steel material, reduce safety hazard, also facilitate the lifting of coiled steel material.

[0006] The utility model discloses the following technical scheme:

[0007] The utility model provides a kind of photovoltaic support raw material safety unwinding device, including frame, frame is by front and rear two groups of symmetrically arranged and is connected by support longitudinal beam bottom support rod is formed, the top surface of bottom support rod is symmetrically fixed with vertical fixed stop lever, one group or multiple groups vertical adjusting stop lever is arranged on the bottom support rod between vertical fixed stop lever, and the cooperation between bottom support rod, support longitudinal beam, vertical fixed stop lever and vertical adjusting stop lever forms the limiting containing space for the placement of reel steel.

[0008] The upper end surface of the bottom support rod is provided with a plurality of rectangular grooves, the left and right sides of the rectangular grooves are symmetrically provided with first threaded holes, the bottom ends of the vertical adjusting stoppers are welded with support plates, the upper end surfaces of the support plates are symmetrically provided with two groups of through holes, and the first threaded holes are vertically arranged with the through holes.

[0009] It also includes an unwinding buffer device detachably arranged on the reel steel, which includes a fixed part and a buffer part. The two fixed parts are symmetrically arranged at the two ends of the buffer part, and are used to limit the two side surfaces and the inner surface of the reel steel. The buffer part is used to limit the outer surface of the reel steel. The lower end of the buffer part is provided with a buffer pad.

[0010] The front and rear ends of the buffer part are symmetrically provided with square through holes, and the two fixed parts are respectively arranged in the corresponding square through holes. Each fixed part includes a square tube and two groups of L-shaped combination rods arranged at the two ends of the square tube. Each group of L-shaped combination rods includes a first L-shaped rod and a second L-shaped rod. In each group of L-shaped combination rods, the horizontal end of the first L-shaped rod is inserted into the opening corresponding to the side of the square tube, the vertical end of the first L-shaped rod is provided with a receiving groove matching the shape of the vertical end of the second L-shaped rod, and the vertical end of the second L-shaped rod is inserted into the receiving groove and is in sliding connection with the receiving groove.

[0011] The upper end surface of the square tube is provided with a plurality of first threaded through holes, the upper end surface of the horizontal end of the first L-shaped rod is provided with a second threaded through hole matching the first threaded through hole, and the square tube and the first L-shaped rod are connected by a third bolt and a threaded through hole.

[0012] The corners of the first L-shaped rod and the second L-shaped rod are provided with reinforcing ribs.

[0013] The top end of the second L-shaped rod is further provided with a limiting block, the limiting block is in sliding connection with the inner wall of the receiving groove, a spring is sleeved on the outer side of the second L-shaped rod between the limiting block and the opening of the receiving groove, the horizontal end of the second L-shaped rod is provided with a third threaded through hole along the axial direction, and the third threaded through holes of the horizontal ends of the second L-shaped rods in the two groups of L-shaped combination rods are threadedly connected with a fourth bolt.

[0014] The herringbone fixing plate is composed of a herringbone plate, an extendable vertical rod, a second bolt and fixing columns, the extendable vertical rod is vertically and slidably connected with the top of the herringbone plate, the second bolt is threadedly connected with the herringbone plate, the top end of the second bolt is in contact with the side of the extendable vertical rod, the top end of the extendable vertical rod and the two bottom ends of the herringbone plate are fixedly connected with the fixing columns, the length of the fixing column connected with the extendable vertical rod is greater than that of the fixing column connected with the herringbone plate, and the front and rear end faces of the buffer part are provided with fixing grooves, a plurality of fixing holes vertically arranged and matched with the fixing columns are further provided on the outer sides of the vertical fixing rods and the vertical adjusting rods, the two fixing columns at the bottom end of the herringbone fixing plate are inserted into the corresponding fixing holes, and the fixing column at the top end is inserted into the fixing groove provided in the buffer part.

[0015] The upper end face of the uncoiling buffer device is provided with an ear.

[0016] The height of the support longitudinal beam is lower than that of the bottom support rod, the inner side of the bottom support rod is provided with a chamfer, and the vertical fixing rods at the two ends of the frame are fixedly connected with inclined supports.

[0017] The uncoiling buffer device provided on the reel steel material can prevent rolling accidents during the uncoiling process of the reel steel material, the ear fixedly connected with the upper end face of the uncoiling buffer device can facilitate hoisting and feeding, and the herringbone fixing plate, the vertical adjusting rod and / or the vertical fixing rod and the uncoiling buffer device jointly act to prevent the reel steel material from being skewed;

[0018] Further, the uncoiling buffer device provided on the reel steel material comprises fixing parts and a buffer part, the two fixing parts are used for limiting the two side faces and the inner face of the reel steel material, and the buffer part is used for limiting the outer face of the reel steel material.

[0019] Further, the buffer part is provided with square through holes symmetrically arranged at the front and rear ends, and the two fixing parts are arranged in the corresponding square through holes; each fixing part comprises a square tube and two groups of L-shaped combination rods arranged at the two ends of the square tube; each group of L-shaped combination rods comprises a first L-shaped rod and a second L-shaped rod, in each group of L-shaped combination rods, the horizontal end of the first L-shaped rod is inserted into the opening on the corresponding side of the square tube, the vertical end of the first L-shaped rod is provided with a receiving groove matched with the shape of the vertical end of the second L-shaped rod, the vertical end of the second L-shaped rod is inserted into the receiving groove and is slidably connected with the receiving groove, a plurality of first threaded through holes are formed in the upper end face of the square tube, a second threaded through hole matched with the first threaded through hole is formed in the upper end face of the horizontal end of the first L-shaped rod, and the square tube and the first L-shaped rod are connected by a third bolt and the threaded through holes, so that the uncoiling buffer device can be matched with reel steel materials of various specifications.

[0020] Further, the first L-shaped rod and the second L-shaped rod are provided with reinforcing ribs at the corners, so that the strength of the L-shaped rod is increased and stress concentration is avoided.

[0021] Further, the utility model discloses the top of second L type pole still fixedly arranged with the limiting block, limiting block and the sliding connection of containing groove inner wall, and the spring is equipped with between the second L type pole outside of opening of containing groove, and the third threaded through -hole of second L type pole horizontal end is along the axial direction all seted up, and the third threaded through -hole of second L type pole horizontal end in two groups L type combination pole is commonly screwed with fourth bolt.

[0022] Further, the utility model discloses the bottom two fixed columns of herringbone fixed plate insert corresponding fixed hole, and the top fixed column inserts the fixed groove that the buffer portion seted up

[0023] Further, the utility model discloses the upper end of uncoiling buffer device is provided with the lifting lug, can conveniently lift the lifting device and lift

[0024] Summarized above, the utility model discloses can prevent the rolling lateral skew etc. Accidental situation of coil steel material uncoiling process, reduces the security risk, also is convenient for the lifting operation of coil steel material after uncoiling. ACCURACY OF DRAWINGS

[0025] Figure 1 It is the structural schematic diagram of the utility model for the structure schematic diagram of the utility model;

[0026] Figure 2 It is the structural schematic diagram of the utility model frame;

[0027] Figure 3 It is the structural schematic diagram of the utility model uncoiling buffer device;

[0028] Figure 4 It is the structural schematic diagram of the utility model buffer portion;

[0029] Figure 5 It is the structural schematic diagram of the utility model fixed portion;

[0030] Figure 6 It is the structural schematic diagram of the utility model herringbone fixed plate.

[0031] In the diagram, 1. Frame; 2. Herringbone fixing plate; 3. Unwinding buffer device; 4. Supporting longitudinal beam; 5. Bottom support rod; 6. Chamfer; 7. First bolt; 8. Support plate; 9. Vertical adjustment stop; 10. Rectangular groove; 11. Threaded hole; 12. Vertical fixing stop; 13. Diagonal brace; 14. Fixing hole; 15. Buffer part; 16. Fixing groove; 17. Square through hole; 18. Buffer pad; 19. Hook; 20. L-shaped rod; 21. First L-shaped rod; 22. Second L-shaped rod; 23-1. First threaded through hole; 23-2, Second threaded through hole; 23-3, Third threaded through hole; 25, Vertical groove; 26, Limiting block; 27, Fourth bolt; 28, Limiting hole; 29, Spring; 30, Square tube; 31, Reinforcing rib; 32, Fixed column; 33, Telescopic vertical rod; 36, Herringbone plate; 37, Coil steel; 38, Fixing part; 39, Second bolt; 40, Third bolt; 41, Receiving groove. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Those skilled in the art should understand that the embodiments described below are only some, not all, of the embodiments disclosed in this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0033] The following describes various non-limiting embodiments of this utility model. Any number of elements in the accompanying drawings is for illustrative purposes only and not for limitation, and any naming is for distinction only and has no limiting meaning.

[0034] The principles and spirit of this utility model will be explained in detail below with reference to several representative embodiments.

[0035] like Figures 1 to 6 As shown, the photovoltaic support raw material safety uncoiling device of this utility model includes a frame 1. The frame 1 is composed of two sets of bottom support rods 5 symmetrically arranged at the front and rear and connected by a support longitudinal beam 4. The top surface of the bottom support rods 5 is symmetrically fixed with vertical fixed stops 12. One or more sets of vertical adjustment stops 9 are fixed on the bottom support rods 5 between the vertical fixed stops 12 by bolts or other means. The cooperation between the bottom support rods 5, the support longitudinal beam 4, the vertical fixed stops 12 and the vertical adjustment stops 9 can form a limited accommodating space for placing the coiled steel 37.

[0036] refer to Figure 2In the embodiment, the bottom support rod 5 is provided with a plurality of rectangular grooves 10 on the upper end surface, and the vertical adjusting stop rod 9 is inserted into the rectangular grooves 10 at different positions, so that the coiled steel 37 with different volumes can be limited, the material and size can be distinguished, and the side deviation can be prevented.

[0037] During the uncoiling process of the coiled steel 37 placed in the frame 1, the radial force generated by the coiled steel 37 may cause the coiled steel 37 to roll over, and in the embodiment, the frame 1 is provided with a plurality of vertical adjusting stop rods 9. Figure 2 The first threaded holes 11 are symmetrically arranged on the left and right sides of the rectangular groove 10, the bottom end of the vertical adjusting stop rod 9 is welded with a support plate 8, two groups of through holes are symmetrically arranged on the upper end surface of the support plate 8, the first threaded holes 11 are vertically arranged with the through holes, after the vertical adjusting stop rod 9 is inserted into the rectangular groove 10, the first bolt 7 is used to cooperate with the corresponding through hole and the first threaded hole 11, so that the vertical adjusting stop rod 9 is fixed on the frame 1, and the coiled steel 37 with different volumes is limited by the vertical adjusting stop rod 9.

[0038] Because the coiled steel 37 is instantaneously released from the radial constraint force during uncoiling, under the action of the elastic force of the coiled steel, the coiled steel 37 will instantaneously rebound along the radial direction, and there is a great safety hazard. In order to solve this problem, the uncoiling buffer device 3 is further arranged in the utility model, which is used for restraining the rebounding process of the coiled steel 37, so that the coiled steel 37 rebounds at a uniform speed, and the safety hazard is eliminated.

[0039] In the utility model, the uncoiling buffer device 3 is detachably connected with the coiled steel 37, the uncoiling buffer device 3 comprises a fixed part 38 and a buffer part 15, the two fixed parts 38 are symmetrically arranged at the two ends of the buffer part 15, the lower end surface of the buffer part 15 is arranged in an arc shape, and the arc surface can be more fitted to the shape of the coiled steel 37. The two fixed parts 38 are used for limiting the two side surfaces and the inner surface of the coiled steel 37, and the buffer part 15 is used for limiting the outer surface of the coiled steel 37.

[0040] Further, the buffer pad 18 is arranged on the lower end arc surface of the buffer part 15, the buffer pad 18 is also arranged in an arc shape as a whole, the buffer pad 18 can not only absorb part of the radial force generated during the uncoiling process of the coiled steel 37, prevent the coiled steel 37 from rolling and deviating, but also can reduce the collision between the coiled steel 37 and the buffer part 15, reduce the mutual damage between the two, and improve the service life of the device.

[0041] In order to adapt to various specifications of the reel steel 37, in the embodiment, square holes 17 are symmetrically arranged at the front and rear ends of the buffer part 15, and two fixing parts 38 are arranged in the corresponding square holes 17 respectively; each fixing part 38 comprises a square tube 30 and two groups of L-shaped combination rods 20 arranged at both ends of the square tube 30 correspondingly, each group of L-shaped combination rods 20 comprises a first L-shaped rod 21 and a second L-shaped rod 22; in each group of L-shaped combination rods 20, the horizontal end of the first L-shaped rod 21 is inserted into the opening on the corresponding side of the square tube 30; the vertical end of the first L-shaped rod 21 is provided with a containing groove 41 matched with the shape of the vertical end of the second L-shaped rod 22, and the vertical end of the second L-shaped rod 22 is inserted into the containing groove 41 and is in sliding connection with the containing groove 41.

[0042] In the utility model, a plurality of first threaded holes 23-1 are arranged on the upper end surface of the square tube 30, a second threaded hole 23-2 matched with the first threaded hole 23-1 is arranged on the upper end surface of the horizontal end of the first L-shaped rod 21, and the square tube 30 and the first L-shaped rod 21 are connected by the third bolt 40 and the threaded hole. By matching the third bolt 40 with the corresponding threaded hole, the position adjustment of the square tube 30 and the first L-shaped rod 21 can be realized, so that the distance between the first L-shaped rods 21 in the two groups of L-shaped combination rods 20 can be adjusted, thereby adapting to the reel steel 37 with different thicknesses.

[0043] In the embodiment, the first L-shaped rod 21 and the second L-shaped rod 22 are provided with the reinforcing ribs 31 at the corners, so that the strength of the L-shaped rod 20 can be increased and stress concentration can be avoided.

[0044] In the embodiment, the top end of the second L-shaped rod 22 is further provided with the limiting block 26, the limiting block 26 is in sliding connection with the inner wall of the containing groove 41, the spring 29 is arranged on the outer side of the second L-shaped rod 22 between the limiting block 26 and the opening of the containing groove 41, so that part of the radial force generated when the reel steel 37 is unwound can be absorbed; the third threaded hole 23-3 is arranged on the horizontal end of the second L-shaped rod 22 along the axial direction, and the third threaded holes 23-3 on the horizontal ends of the second L-shaped rods 22 in the two groups of L-shaped combination rods 20 are threadedly matched with the fourth bolt 27, so that the two groups of second L-shaped rods 22 arranged symmetrically can be connected by the fourth bolt 27 after the fixing part 38 adapts to the thickness and diameter of the reel steel 37.

[0045] After the reel steel 37 is placed into the frame 1, the buffer part 15 is installed to the top end of the reel steel 37, according to the thickness of the reel steel 37, the position of the first L-shaped rod 21 and the square tube 30 is adjusted to adapt to the thickness of the reel steel 37; the fourth bolt 27 and the two groups of second L-shaped rods 22 arranged symmetrically can limit the inner ring of the reel steel 37, and the vertical length of the fixing part 38 is adjustable through the elastic force of the spring 29, so that the width requirement of different reel steels 37 and the radial expansion of the reel steel 37 during uncoiling can be adapted; meanwhile, the cooperation of the spring 29 and the buffer pad 18 can also effectively absorb the radial force generated during the uncoiling of the reel steel 37, so that the reel steel 37 can be opened at a uniform speed, and the safety hidden danger is eliminated.

[0046] In order to further improve the constraint on the reel steel 37 opening process, and limit the position of the uncoiling buffer device 3 on the reel steel 37, prevent the uncoiling buffer device from sliding during the reel steel 37 opening process, the utility model also provides a herringbone fixing plate 2, which is detachably connected with the uncoiling buffer device 3, the vertical fixing rod 12 and / or the vertical adjusting rod 9; the herringbone fixing plate 2 can also use the vertical fixing rod 12 and the vertical adjusting rod 9 to avoid the accidental situation of the reel steel 37 rolling over through the cooperation with the vertical fixing rod 12, the vertical adjusting rod 9 and / or the uncoiling buffer device 3.

[0047] Specifically, referring to Figure 6 , the herringbone fixing plate 2 is composed of a herringbone plate 36, a telescopic vertical rod 33, a second bolt 39 and a fixed column 32, the telescopic vertical rod 33 is vertically slidably connected with the top (i.e. vertical part) of the herringbone plate 36, the second bolt 39 is threadedly connected with the herringbone plate 36, and the top end of the second bolt 39 is in contact with the side surface of the telescopic vertical rod 33, so that the position of the telescopic vertical rod 33 and the herringbone plate 36 can be fixed by rotating the second bolt 39 to abut against the telescopic vertical rod 33, and the length of the part of the telescopic vertical rod 33 extending out of the herringbone plate 36, i.e. the overall height of the herringbone fixing plate 2, can be adjusted, so that the herringbone fixing plate 2 can adapt to different specifications of the reel steel 37; the top end of the telescopic vertical rod 33 and the two bottom ends of the herringbone plate 36 are fixedly connected with the fixed columns 32, and the length of the fixed column 32 connected with the telescopic vertical rod 33 is greater than that of the fixed column 32 connected with the herringbone plate 36.

[0048] In the utility model, the front and rear end surfaces of the buffer part 15 are provided with fixed grooves 16; the outer sides of the vertical fixing rod 12 and the vertical adjusting rod 9 are also vertically provided with a plurality of fixed holes 14 matched with the fixed columns 32; the two fixed columns 32 at the bottom end of the herringbone fixing plate 2 are inserted into the corresponding fixed holes 14, and the top end fixed column 32 is inserted into the fixed groove 16 provided in the buffer part 15, so that the circumferential force generated during the uncoiling of the reel steel 37 can prevent the uncoiling buffer device 3 from deviating.

[0049] Considering that the coiled steel 37 needs to be lifted and transferred after being uncoiled and placed in the coiled steel 37 processing station, for the coiled steel 37 whose weight does not exceed a set value (such as 1 ton), the utility model also sets a lifting lug 19 on the upper end surface of the uncoiling buffer device 3, and the coiled steel 37 is directly lifted through the lifting lug 19, at this time the spring 29 is in a compressed state, and the uncoiling buffer device 3 can always play a clamping role on the coiled steel 37 during the lifting process.

[0050] In the embodiment, the coiled steel 37 exerts a downward force after being placed, and the bottom is prone to friction with the ground to damage the surface zinc layer; in order to prevent the above wear and tear, in the utility model, the height of the support longitudinal beam 4 is lower than the height of the bottom support rod 5, and the coiled steel 37 can be prevented from contacting the ground to prevent friction and damage to the surface plating layer after being placed.

[0051] In the embodiment, the inside of the bottom support rod 5 is provided with a chamfer 6 to prevent the edge of the bottom support rod 5 from causing wear and tear to the surface plating layer of the coiled steel 37.

[0052] In the embodiment, the vertical fixed stop rod 12 at both ends of the frame 1 is reinforced by being fixedly connected with a diagonal brace 13, and the vertical fixed stop rod 12 and the diagonal brace 13 can be connected by welding to further strengthen the overall structural strength.

[0053] In the embodiment, the bolts used in the above are standard specifications, and the replacement of the damaged bolts is facilitated.

[0054] The utility model can prevent the coiled steel from rolling and tilting during the uncoiling process, reduce the safety hazards, and facilitate the lifting operation after the coiled steel is uncoiled.

[0055] According to the above description of the present specification, those skilled in the art can also understand that the terms used, such as "up", "down", "front", "back", "left", "right", "inner", "outer" and the like, are indicative of the orientation or positional relationship based on the orientation or positional relationship shown in the drawings of the present specification, and are only for the purpose of facilitating the description of the scheme of the utility model and simplifying the description, and do not explicitly or implicitly indicate or imply that the devices or elements involved must have the specified orientation, be constructed and operated in a specified orientation, therefore the above orientation or positional relationship terms cannot be understood or interpreted as a limitation on the scheme of the utility model.

[0056] In addition, in the description of the present specification, "a plurality of" means at least two, such as two, three or more, etc., unless otherwise specifically limited.

Claims

1. A photovoltaic racking stock material safety unwinding device, characterized in that: The frame is composed of two groups of bottom support rods arranged symmetrically and connected by support longitudinal beams, the top surface of the bottom support rod is symmetrically provided with vertical fixed stop rods, and one or more groups of vertical adjusting stop rods are arranged on the bottom support rod between the vertical fixed stop rods.

2. A photovoltaic support raw material safe unwinding device according to claim 1, characterized in that: The upper end surface of the bottom support rod is provided with a plurality of rectangular grooves, the left and right sides of the rectangular grooves are symmetrically provided with first threaded holes, the bottom end of the vertical adjusting stop rod is welded with a support plate, the upper end surface of the support plate is symmetrically provided with two groups of through holes, and the first threaded holes and the through holes are vertically arranged.

3. A photovoltaic support raw material safe unwinding device according to claim 1, characterized in that: The uncoiling buffer device includes a fixed part and a buffer part, two fixed parts are symmetrically arranged at both ends of the buffer part, the two fixed parts are used for limiting the two side surfaces and the inner surface of the reel steel, and the buffer part is used for limiting the outer surface of the reel steel.

4. A photovoltaic racking precursor material safe unwinding device according to claim 3, characterized in that: The front and rear ends of the buffer part are symmetrically provided with square through holes, and the two fixed parts are arranged in the corresponding square through holes; each fixed part includes a square tube and two groups of L-shaped combination rods arranged at both ends of the square tube; each group of L-shaped combination rods includes a first L-shaped rod and a second L-shaped rod, and in each group of L-shaped combination rods, the horizontal end of the first L-shaped rod is inserted into the opening on the corresponding side of the square tube, the vertical end of the first L-shaped rod is provided with a receiving groove matched with the shape of the vertical end of the second L-shaped rod, and the vertical end of the second L-shaped rod is inserted into the receiving groove and is in sliding connection with the receiving groove.

5. A photovoltaic racking precursor material safe unwinding device according to claim 4, characterized in that: The upper end surface of the square tube is provided with a plurality of first threaded through holes, the upper end surface of the horizontal end of the first L-shaped rod is provided with second threaded through holes matched with the first threaded through holes, and the square tube and the first L-shaped rod are connected by third bolts and threaded through holes.

6. A photovoltaic rack stock material safe unwinding device according to claim 4, characterized in that: The corners of the first L-shaped rod and the second L-shaped rod are provided with reinforcing ribs.

7. A photovoltaic rack stock material safe unwinding device according to claim 4, characterized in that: The top end of the second L-shaped rod is further provided with a limiting block in sliding connection with the inner wall of the receiving groove, a spring is sleeved on the outer side of the second L-shaped rod between the limiting block and the opening of the receiving groove, the horizontal end of the second L-shaped rod is provided with third threaded through holes in the axial direction, and the third threaded through holes of the horizontal end of the second L-shaped rod in the two groups of L-shaped combination rods are threadedly connected with a fourth bolt.

8. A photovoltaic rack stock material safe unwinding device according to claim 3, characterized in that: The herringbone-shaped fixing plate is detachably connected with the uncoiling buffer device, the vertical fixed stop rod and / or the vertical adjusting stop rod, and the herringbone-shaped fixing plate is composed of a herringbone-shaped plate, an extendable vertical rod, a second bolt and a fixed column.

9. A photovoltaic rack stock material safe unwinding device according to claim 3, characterized in that: The upper end surface of the uncoiling buffer device is provided with an ear.

10. A photovoltaic racking stock material safety unwinding device according to claim 1, characterized in that: The height of the support longitudinal beam is lower than the height of the bottom support rod, the inside of the bottom support rod is provided with a chamfer, and the vertical fixed ledge rods at both ends of the frame are provided with inclined braces through fixed connection.

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