Anti-dropping clamp nut mechanism for fastening C-shaped metal frame photovoltaic panels

Abstract

The invention discloses an anti-slipping clamping nut mechanism for fastening a C-shaped metal frame photovoltaic panel, which solves the problem of how to effectively overcome the problem of nuts following the rotation of bolts during bolt tightening; a bolt upper through hole (2) is arranged in the middle of a bottom plate of a U-shaped groove base (1); a four-corner nut (3) is embedded in a groove body of the U-shaped groove base (1) and is welded to the U-shaped groove base; a central screw hole of the four-corner nut (3) and the bolt upper through hole (2) are arranged correspondingly; a left-inverted L-shaped spring piece (4) and a right-inverted L-shaped spring piece (5) are respectively arranged on one side vertical edge of the U-shaped groove base (1); the U-shaped groove base (1), the four-corner nut (3), the left-inverted L-shaped spring piece (4) and the right-inverted L-shaped spring piece (5) form an integrated anti-slipping clamping nut assembly; the four-corner nut (3) is effectively prevented from following the rotation when rotating with the upper through bolt.

Description

Technical Field

[0001] The invention relates to a component for installing and fastening a photovoltaic panel, and in particular to an anti-dropping clamping pad nut mechanism for fastening a C-shaped metal frame photovoltaic panel when fastening and installing the photovoltaic panel and a steel support purlin in monsoon-prone areas. Background Art

[0002] New energy sources generally include solar energy, geothermal energy, wind energy and other energy sources, among which solar energy is the most widely used. Solar energy converts the heat emitted by the sun into electrical energy through photovoltaic power generation devices, which is achieved through photovoltaic modules; the photovoltaic modules (i.e. photovoltaic panels) of the photovoltaic power plant are installed and fixed on the steel support purlins, and the photovoltaic panels are embedded in the metal frame, and the metal frame is fixedly connected to the steel support purlins (hot-dip galvanized C-shaped steel) by bolts; most metal frames are C-shaped frames, and the cross-section of this C-shaped frame is C-shaped, with an opening facing outward, a groove at the bottom, an inverted groove at the top, and a bolt through hole at the bottom of the C-shaped groove of the frame; the installation and fixing process of the C-shaped metal frame photovoltaic panel is as follows: first place the C-shaped metal frame photovoltaic panel to the installation position on the steel support purlin, and then pass the connecting bolt rod from top to bottom through the bolt hole in the groove set at the bottom of the C-shaped frame and the bolt hole on the steel support purlin, and then connect it with the lower The square nuts are connected together, and the screw and the nut are tightened together by rotating the screw rod; during the on-site installation of photovoltaic panels, since the spacing between two adjacent photovoltaic panels is only 20 mm, it is impossible to insert the wrench into the gap between the two photovoltaic panels. When the hexagonal nuts are rotated to tighten the bolts, they often rotate with the bolts. Sometimes, the rotational tightening force of the bolts causes the side vertical plates at the bottom of the C-shaped groove to deform, resulting in the photovoltaic panel frame being unable to be securely fixed on the steel support purlins; in addition, in windy seasons, due to the continuous influence of wind force, bolts that are not tightened in place will also loosen and fall off, eventually causing the photovoltaic components to deform, fall off and be damaged; therefore, how to effectively overcome the defect that the nuts rotate with the screw rods during the tightening of the bolts during the installation of the C-shaped aluminum alloy frame photovoltaic panels, and securely fix the C-shaped metal frame photovoltaic panels on the steel support purlins is a problem that needs to be solved on site. Summary of the invention

[0003] The present invention provides an anti-dropping clamping pad nut mechanism for fastening a C-shaped metal frame photovoltaic panel, which solves the technical problem of how to effectively overcome the problem that the nut rotates with the bolt during bolt tightening.

[0004] The present invention solves the above technical problems through the following technical solutions:

[0005] The overall concept of the present invention is as follows: first, according to the size of the C-shaped groove of the C-shaped metal frame of the photovoltaic panel, an anti-slip pad nut assembly is made of a 1 mm thick galvanized steel plate, the anti-slip pad assembly is composed of a U-shaped groove base, four-corner nuts and two inverted L-shaped spring pieces in one, a bolt through hole is arranged in the middle of the U-shaped groove base, and four-corner nuts are welded in the U-shaped groove base, the central screw holes of the four-corner nuts are arranged corresponding to the bolt through holes, and a left inverted L-shaped spring piece and a right inverted L-shaped spring piece are respectively connected to the inner vertical edges of the U-shaped groove base; the integrated anti-slip pad nut assembly is embedded in the bottom groove of the outward opening of the C-shaped metal frame, so that the two inverted L-shaped spring pieces can be elastically connected to the top groove of the outward opening of the C-shaped metal frame, so that the anti-slip pad nut assembly and the C-shaped metal frame are tightly embedded together; thereby the four-corner nuts are firmly embedded in the C-shaped metal frame, and the four-corner nuts are effectively prevented from rotating with the rotation when the four-corner nuts and the upper through bolts are rotated.

[0006] The invention discloses an anti-dropping clamping nut mechanism for fastening a C-shaped metal frame photovoltaic panel, comprising a U-shaped groove base and four-corner nuts, wherein a bolt through hole is arranged in the middle of the bottom plate of the U-shaped groove base, the four-corner nuts are embedded in the groove body of the U-shaped groove base and are welded together with the U-shaped groove base, the central screw hole of the four-corner nut and the bolt through hole are arranged correspondingly, a left inverted L-shaped spring piece and a right inverted L-shaped spring piece are respectively arranged on one side vertical edge of the U-shaped groove base, the U-shaped groove base, the four-corner nuts, the left inverted L-shaped spring piece and the right inverted L-shaped spring piece form an integrated anti-dropping clamping nut assembly.

[0007] The integrated anti-dropping clamping washer nut assembly is embedded in the C-shaped metal frame of the photovoltaic panel. The opening of the C-shaped metal frame faces outward. A bottom groove is arranged at the bottom end of the C-shaped metal frame, and a top groove is arranged at the top end of the C-shaped metal frame. The U-shaped groove base is embedded in the bottom groove, and the top end of the left inverted L-shaped spring clip and the top end of the right inverted L-shaped spring clip are connected to the top groove.

[0008] The C-shaped metal frame of the photovoltaic panel is set on the top plate of the steel support purlin, and an upper bolt through hole is set on the top plate of the steel support purlin. The upper bolt passes through the upper bolt through hole and the bolt upper through hole set in the middle of the bottom plate of the U-shaped channel base in sequence from bottom to top, and is screwed together with the four corner nuts. Elastic washers and flat washers are respectively set between the bolt heads of the upper bolts and the top plate of the channel steel support.

[0009] A method for fixing a C-shaped metal frame photovoltaic panel on a steel support purlin to prevent it from falling off comprises a C-shaped metal frame inlaid with a photovoltaic panel, the C-shaped metal frame is arranged at the top of a channel steel support, a bottom groove is arranged at the bottom end of the C-shaped metal frame, a through hole for an upper bolt is arranged on the bottom plate of the bottom groove, a top groove is arranged at the top of the C-shaped metal frame, and the opening of the C-shaped metal frame faces outward, characterized by the following steps:

[0010] The first step is to measure the inner size of the C-shaped notch of the C-shaped metal frame, and make an integrated anti-dropping clamping pad nut assembly according to the measured size. The anti-dropping clamping pad nut assembly is composed of a U-shaped groove base, a four-corner nut, a left-inverted L-shaped spring piece and a right-inverted L-shaped spring piece. A bolt through hole is set in the middle of the bottom plate of the U-shaped groove base, and the four-corner nut is embedded in the groove body of the U-shaped groove base and welded to the U-shaped groove base. The central screw hole of the four-corner nut is set corresponding to the bolt through hole, and a left-inverted L-shaped spring piece and a right-inverted L-shaped spring piece are respectively set on one side of the vertical edge of the U-shaped groove base; the width of the U-shaped groove base is equal to the inner groove width of the bottom groove, and the height of the U-shaped groove base plus the height of the left-inverted L-shaped spring piece is equal to the inner groove height of the C-shaped groove;

[0011] Step 2: By pressing down the top of the left inverted L-shaped spring piece and the top of the right inverted L-shaped spring piece, the integrated anti-dropping clamping washer nut assembly is embedded into the C-shaped groove of the C-shaped metal frame, so that the U-shaped groove base is clamped in the bottom groove set at the bottom end of the C-shaped metal frame, and the top of the left inverted L-shaped spring piece and the top of the right inverted L-shaped spring piece are connected to the top groove set at the top end of the C-shaped metal frame, and the central screw hole of the four-corner nut is set correspondingly to the through hole of the upper bolt in the bottom groove;

[0012] The third step is to pass the upper through bolts through the upper through bolt holes set on the top plate of the steel support purlin and the bolt upper through holes on the bottom plate of the U-shaped channel base from bottom to top, and then screw them together with the four-corner nuts. Use an electric wrench to rotate and tighten the upper through bolts to achieve the tightening screw connection between the upper through bolts and the four-corner nuts, and realize the fastening of the C-shaped metal frame photovoltaic panel to the top plate of the channel steel support.

[0013] An elastic washer and a flat washer are respectively arranged between the bolt head of the upper through bolt and the top plate of the channel steel bracket; the length of the U-shaped channel base is 40 mm.

[0014] The present invention can effectively prevent the phenomenon that the nut rotates with the bolt, resulting in the failure to fasten the photovoltaic panel and the bracket when the bolt is rotated to fasten the nut, and prevent the components from falling off and being damaged and causing related losses due to the long-term action of the monsoon; the structure is simple, the installation is convenient, the labor is saved, the difficulty of on-site installation operations is reduced, and the anti-slip pad is simple to process and low in cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the present invention;

[0016] Figure 2 It is a schematic structural diagram of the anti-dropping clamping washer nut assembly of the present invention in the main viewing direction;

[0017] Figure 3 It is a schematic structural diagram of the anti-dropping clamping washer nut assembly of the present invention in a side view direction;

[0018] Figure 4 It is a schematic structural diagram of the anti-dropping clamping washer nut assembly of the present invention when viewed from above. DETAILED DESCRIPTION

[0019] The present invention is described in detail below in conjunction with embodiments:

[0020] The U-shaped groove base 1 is provided with a bolt through hole 2 in the middle of the bottom plate of the U-shaped groove base 1, and the four-corner nut 3 is embedded in the groove body of the U-shaped groove base 1 and is welded together with the U-shaped groove base, so that the inner and outer vertical plates of the U-shaped groove base become extensions of the outer side surfaces of the four-corner nut 3, and the central screw hole of the four-corner nut 3 is arranged corresponding to the bolt through hole 2, and a left inverted L-shaped spring clip 4 and a right inverted L-shaped spring clip 5 are respectively arranged on one side vertical edge of the U-shaped groove base 1, and the lower vertical plates of the left inverted L-shaped spring clip 4 and the lower vertical plates of the right inverted L-shaped spring clip 5 are an integrated plate with one side vertical edge of the U-shaped groove base 1, and the U-shaped groove base 1, the four-corner nut 3, the left inverted L-shaped spring clip 4 and the right inverted L-shaped spring clip 5 form an integrated anti-slip pad nut assembly, and the integrated anti-slip pad nut assembly is essentially a nut body with two vertical surfaces of the four-corner nut 3 extended outward.

[0021] The integrated anti-slip pad nut assembly is embedded in the C-shaped metal frame 10 of the photovoltaic panel. The opening of the C-shaped metal frame 10 faces outward, and a bottom groove 11 is arranged at the bottom end of the C-shaped metal frame 10, and a top groove 12 is arranged at the top end of the C-shaped metal frame 10. Photovoltaic panels are inlaid in the C-shaped metal frame 10, and upper bolt passing holes are arranged in the bottom groove 11, so that bolts for fixing the photovoltaic panels can pass through and connect with nuts in the bottom groove 11, so as to fix the C-shaped metal frame 10; the U-shaped groove base 1 is embedded in the bottom groove 11, and the top ends of the left inverted L-shaped spring clip 4 and the right inverted L-shaped spring clip 5 are connected to the top groove 12; the integrated anti-slip pad nut assembly is movably clamped in the bottom groove 11 arranged at the bottom end of the C-shaped aluminum alloy frame 10, so that the C-shaped metal frame 10 forms a rotation limit clamping connection with the four-corner nut 3.

[0022] The C-shaped metal frame 10 of the photovoltaic panel is set on the top plate of the steel support purlin 9. An upper bolt through hole is set on the top plate of the steel support purlin 9. The upper bolt 6 passes through the upper bolt through hole and the bolt upper through hole 2 set in the middle of the bottom plate of the U-shaped channel base 1 in sequence from bottom to top, and is screwed together with the four-corner nuts 3. Elastic washers 7 and flat washers 8 are respectively arranged between the bolt heads of the upper bolts 6 and the top plate of the channel steel support 9; the C-shaped metal frame photovoltaic panel and the steel support purlin 9 are fixed to the steel support purlin by the connection cooperation of bolts and nuts. Therefore, it is crucial whether the bolts and nuts are tightened.

[0023] A method for fixing a C-shaped metal frame photovoltaic panel on a steel support purlin to prevent it from falling off, comprising a C-shaped metal frame 10 inlaid with a photovoltaic panel, the C-shaped metal frame 10 being arranged at the top of the steel support purlin 9, a bottom groove 11 being arranged at the bottom end of the C-shaped metal frame 10, a through hole for an upper bolt being arranged on the bottom plate of the bottom groove 11, a top groove 12 being arranged at the top end of the C-shaped metal frame 10, and an opening of the C-shaped metal frame 10 facing outward, characterized by the following steps:

[0024] The first step is to measure the inner size of the C-shaped notch of the C-shaped metal frame 10, and make an integrated anti-dropping clamping nut assembly according to the measured size. The anti-dropping clamping nut assembly is composed of a U-shaped groove base 1, a four-corner nut 3, a left-inverted L-shaped spring piece 4 and a right-inverted L-shaped spring piece 5. A bolt through hole 2 is arranged in the middle of the bottom plate of the U-shaped groove base 1, and the four-corner nut 3 is embedded in the groove body of the U-shaped groove base 1 and welded to the U-shaped groove base. The central screw hole of the four-corner nut 3 is arranged corresponding to the bolt through hole 2, and a left-inverted L-shaped spring piece 4 and a right-inverted L-shaped spring piece 5 are respectively arranged on one side of the vertical edge of the U-shaped groove base 1; the width of the U-shaped groove base 1 is equal to the inner groove width of the bottom groove 11, and the height of the U-shaped groove base 1 plus the height of the left-inverted L-shaped spring piece 4 is equal to the inner groove height of the C-shaped groove;

[0025] Step 2: By pressing down the top of the left inverted L-shaped spring piece 4 and the top of the right inverted L-shaped spring piece 5, the integrated anti-dropping clamping pad nut assembly is embedded into the C-shaped groove of the C-shaped metal frame 10, so that the U-shaped groove base 1 is clamped in the bottom groove 11 set at the bottom end of the C-shaped metal frame 10, and the top of the left inverted L-shaped spring piece 4 and the top of the right inverted L-shaped spring piece 5 are connected to the top groove 12 set at the top end of the C-shaped metal frame 10, and the central screw hole of the four-corner nut 3 is set correspondingly to the upper bolt through hole in the bottom groove 11;

[0026] The third step is to pass the upper through bolt 6 through the upper through bolt through hole set on the top plate of the steel support purlin 9 and the bolt upper through hole 2 on the bottom plate of the U-shaped groove base 1 in sequence from bottom to top, and then screw it together with the four-corner nut 3. Use an electric wrench to rotate and tighten the upper through bolt 6 to achieve the tightening screw connection between the upper through bolt 6 and the four-corner nut 3, so as to fasten the C-shaped metal frame photovoltaic panel to the top plate of the steel support purlin 9.

[0027] An elastic washer 7 and a flat washer 8 are respectively arranged between the bolt head of the upper through bolt 6 and the top plate of the steel bracket purlin 9. The arrangement of the two washers further tightens the nut; the length of the U-shaped groove base 1 is 40 mm.

[0028] The U-shaped groove base 1, the top of the left inverted L-shaped spring piece 4 and the right inverted L-shaped spring piece 5 are made of a 1 mm thick galvanized sheet. A piece of galvanized sheet is bent into a U-shaped groove, and then the middle part of the upper part of the pad is cut off to form two inverted L-shaped spring pieces to increase the elasticity and deformation force of the pad.

Claims

1. An anti-dropping clamping nut mechanism for fastening a C-shaped metal frame photovoltaic panel, comprising a U-shaped groove base (1) and a four-corner nut (3), characterized in that: A bolt through hole (2) is provided in the middle of the bottom plate of the U-shaped groove base (1); a four-corner nut (3) is embedded in the groove body of the U-shaped groove base (1) and is welded to the U-shaped groove base; the central screw hole of the four-corner nut (3) and the bolt through hole (2) are provided correspondingly; a left inverted L-shaped spring piece (4) and a right inverted L-shaped spring piece (5) are provided on one side vertical edge of the U-shaped groove base (1); the U-shaped groove base (1), the four-corner nut (3), the left inverted L-shaped spring piece (4) and the right inverted L-shaped spring piece (5) form an integrated anti-dropping clamping pad nut assembly.

2. The anti-dropping clamping nut mechanism for fastening a C-shaped metal frame photovoltaic panel according to claim 1 is characterized in that: The integrated anti-dropping clamping washer nut assembly is embedded in a C-shaped metal frame (10) of a photovoltaic panel. The opening of the C-shaped metal frame (10) faces outwards. A bottom groove (11) is provided at the bottom end of the C-shaped metal frame (10). A top groove (12) is provided at the top end of the C-shaped metal frame (10). The U-shaped groove base (1) is embedded in the bottom groove (11). The top ends of the left inverted L-shaped spring clip (4) and the top ends of the right inverted L-shaped spring clip (5) are connected to the top groove (12).

3. The anti-dropping clamping nut mechanism for fastening a C-shaped metal frame photovoltaic panel according to claim 1 or 2, characterized in that: The C-shaped metal frame (10) of the photovoltaic panel is arranged on the top plate of the steel support purlin (9), and an upper bolt passing hole is arranged on the top plate of the steel support purlin (9). The upper bolt (6) passes through the upper bolt passing hole and the bolt upper through hole (2) arranged in the middle of the bottom plate of the U-shaped groove base (1) in sequence from bottom to top, and is then screwed together with the four-corner nut (3). An elastic washer and a flat washer are respectively arranged between the bolt head of the upper bolt (6) and the top plate of the steel support purlin (9).

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