Photovoltaic support with anti-loosening function

Abstract

The invention discloses a photovoltaic support with an anti-loosening function, and belongs to the technical field of solar power generation equipment, the photovoltaic support comprises a stand column and inclined struts on the two sides of the stand column, the lower ends of the inclined struts are connected with the stand column through connecting structures, the tops of the stand column and the inclined struts are connected with oblique beams, and the oblique beams are connected with purlines through anti-loosening bolt pairs; the connecting structure comprises a hoop and an anti-loosening bolt pair at the end of the hoop, and the anti-loosening bolt pair is used for reinforcing. According to the anti-loosening bolt pair, a nut extrudes a cover piece through an anti-skid gasket in the screwing process of a bolt, so that shape memory alloy exerts superelasticity of the shape memory alloy, or when the temperature is high, the alloy exerts the shape memory effect of the shape memory alloy to provide opposite acting force meeting the pre-tightening force for the cover piece and the anti-skid gasket; therefore, relative sliding between the cover plate and the anti-skid gasket is effectively prevented, the memory alloy can automatically sense looseness of the nut, and the effect of fixing the pre-tightening force in real time is achieved. The overall stability and safety of the photovoltaic support are improved through the anti-loosening bolt pair, and the reliability of power generation equipment is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of solar power generation equipment, and in particular relates to a photovoltaic bracket with an anti-loosening function. Background Art

[0002] As a clean energy with abundant reserves, solar energy has become an important choice in the global new energy field. With the continuous development of my country's photovoltaic industry, the installation demand of photovoltaic brackets has also increased rapidly. For some important parts that are subject to frequent vibration, the reliability requirements are also constantly increasing. At present, ordinary bolts are mostly used for installation and fixation in the field of photovoltaic brackets. Because photovoltaic brackets are in an outdoor environment, bolt connections may be subject to lateral, vertical and torsional loads. As time goes by, the bolts may gradually reduce the preload force or even become loose due to factors such as thermal expansion and contraction, vibration, load changes, and material fatigue. This not only affects the firmness of the connection, but also reduces the mechanical properties of the connector. Damage to parts at the bracket connection node causes the photovoltaic module to fall off, affecting the overall stability of the photovoltaic bracket, and may also cause structural failures or safety hazards. Therefore, it is necessary to develop a photovoltaic bracket with an anti-loosening function to improve its stability and safety performance. Summary of the invention

[0003] In order to solve the above problems, the present invention provides a photovoltaic bracket with an anti-loosening function.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0005] A photovoltaic support with an anti-loosening function comprises a column and oblique braces arranged on both sides thereof, the lower end of the oblique brace is connected to the column via a connecting structure, the top of the column and the oblique brace are respectively connected to the middle and both sides of an oblique beam, a photovoltaic assembly is provided on the top of the oblique beam, and the photovoltaic assembly is connected to the oblique beam via a connecting assembly; the connecting assembly comprises an anti-loosening bolt pair and a purlin, the purlin is fixed to the bottom of the photovoltaic assembly, and the purlin is connected to the oblique beam via an anti-loosening bolt pair; the connecting structure comprises two hoops for cooperating with the column, and the ends of the two hoops are fixed by an anti-loosening bolt pair.

[0006] Furthermore, the anti-loosening bolt pair includes a bolt, a combined gasket, an anti-slip washer and a nut, one end of the bolt is fixed with a nut, and the other end is threadedly matched with the nut, the combined gasket and the anti-slip washer are both mounted on the bolt, the nut and the combined gasket of the bolt are respectively arranged on both sides of the connected part, and the end surface of the combined gasket on the side in contact with the connected part is provided with a washer anti-slip pattern; an anti-slip washer is arranged between the combined gasket and the nut, and the end surface of the anti-slip washer on the side in contact with the nut is provided with a gasket anti-slip pattern, and the end surface of the other side of the anti-slip washer is provided with a reverse wedge-shaped tooth that engages with the combined gasket, and the edges around the reverse wedge-shaped tooth are provided with a rotation groove that rotates with the combined gasket.

[0007] Furthermore, the anti-skid patterns of the washer hoop and the anti-skid patterns of the washer are both concave radial fine teeth, which are used to increase the friction between the combined gasket and the connected part, and between the anti-skid washer and the nut.

[0008] Furthermore, the combined gasket includes a cover plate, a memory alloy mesh ring and a gasket hoop, the side wall of the gasket hoop is provided with an annular inner cavity with an open top, the cover plate is arranged at the open end of the annular inner cavity, the memory alloy mesh ring is arranged in the annular inner cavity, and its upper and lower end surfaces are respectively rotatably matched with the cover plate and the bottom of the annular inner cavity; the four sides of the cover plate and the gasket hoop are detachably connected through a clamping structure; the outer end face of the cover plate is provided with positive wedge-shaped teeth for engaging with the reverse wedge-shaped teeth on the anti-slip gasket.

[0009] Furthermore, the snap-fit ​​structure includes multiple groups of snaps and limiting slots, multiple snaps are spaced and protrudingly arranged on the four edges of the cover plate, the limiting slots are spaced and arranged on the outer wall of the gasket, and the snaps around the cover plate can be inserted into the limiting slots around the gasket.

[0010] Furthermore, the buckle is a long rectangular block, the limiting slot is a corresponding rectangular slot, and the limiting slot is a notch slot that is open on the outside and passes through from top to bottom.

[0011] Furthermore, the memory alloy mesh ring includes a bottom plate, a top plate and a memory alloy mesh therebetween, the memory alloy mesh is composed of nickel-titanium-niobium alloy filaments arranged in a honeycomb and spider web bionic structure, the top plate and the bottom plate are respectively connected to the upper and lower surfaces of the memory alloy mesh on the opposite sides, the bottom plate and the top plate are both provided with an annular groove on the outward side, a ball bearing is provided in the annular groove, a cover plate bottom groove matching the ball bearing is provided on the inner end face of the cover plate, a washer bottom groove matching the ball bearing is provided at the bottom of the annular inner cavity of the washer, and the cover plate and the bottom of the annular inner cavity are respectively abutted against the ball bearing.

[0012] Furthermore, the ball bearing includes a plurality of steel balls arranged in a ring shape and a ball hoop for limiting the position of the steel balls. The steel balls can roll in the ball hoop. The plurality of steel ball hoop are connected by a connecting frame and are arranged in a ring shape in the annular slide groove.

[0013] Furthermore, the ball bearings on the bottom plate and the top plate each have two circles, and the bottom slide groove of the cover plate and the bottom slide groove of the washer hoop each have two circles.

[0014] Furthermore, in the process of tightening the nut, the washer is frictionally fixed to the connected part through the anti-slip grooves of the washer at the bottom, and the nut produces relative movement with the cover plate through the anti-slip grooves of the washer at the top of the anti-slip washer, and the reverse wedge teeth at the bottom of the anti-slip washer and the positive wedge teeth on the top of the cover plate engage with each other to ensure the pre-tightening force of the bolt pair; continue to tighten the nut, and the anti-slip washer compresses and deforms the memory alloy mesh ring in the washer by squeezing the cover plate, and the memory alloy mesh ring will squeeze the cover plate and the anti-slip washer in the reverse direction of the bolt, and then squeeze the nut in the reverse direction, thereby increasing the friction between the cover plate and the anti-slip washer and between the anti-slip washer and the nut, preventing the pre-tightening force from changing and thus ensuring the overall stability of the anti-loosening bolt pair.

[0015] Compared with the prior art, the present invention has the following technical advances:

[0016] The present invention fixes the connecting structure connected between the diagonal brace and the column by using an anti-loosening bolt pair, and the bottom purlin and the diagonal beam of the photovoltaic module are also fixed by an anti-loosening bolt pair, and the anti-loosening bolt pair is used to play an anti-loosening reinforcement role; the anti-loosening principle of the anti-loosening bolt pair is that the nut squeezes the cover plate through the anti-skid washer during the tightening process of the bolt, so that the shape memory alloy exerts its superelastic performance or when the temperature is high, the alloy exerts its shape memory effect to provide a reverse force that satisfies the preload force to the cover plate and the anti-skid washer, thereby effectively preventing the cover plate and the anti-skid washer from sliding relative to each other, and the memory alloy can automatically sense the loosening of the nut, achieving the effect of real-time fixing of the preload force. The present invention combines friction anti-loosening with structural mechanical anti-loosening, and exerts the excellent performance of the shape memory alloy and the bionic structure benefits of the honeycomb and spider web, which can prevent the preload force from decreasing, ensure the firmness between the bolts and nuts and the connection parts, and thus improve the overall stability and safety of the photovoltaic bracket. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0018] In the attached picture:

[0019] Figure 1 A schematic structural diagram of a photovoltaic bracket with an anti-loosening function provided by an embodiment of the present invention;

[0020] Figure 2 It is a structural schematic diagram of an anti-loosening bolt pair in an embodiment of the present invention;

[0021] Figure 3 for Figure 2 The main view;

[0022] Figure 4 An exploded schematic diagram of a combined gasket and an anti-slip gasket in an embodiment of the present invention;

[0023] Figure 5 is a front view schematic diagram of an anti-slip gasket in an embodiment of the present invention;

[0024] Figure 6 for Figure 5 Schematic diagram of the reverse side of the middle anti-skid washer;

[0025] Figure 7 is a front schematic diagram of a cover sheet according to an embodiment of the present invention;

[0026] Figure 8 for Figure 7 A schematic diagram of the reverse side of the middle cover sheet;

[0027] Fig. 9 It is a front view schematic diagram of the gasket in the embodiment of the present invention;

[0028] Fig.10 for Fig. 9 Schematic diagram of the reverse side of the middle hoop;

[0029] Fig.11 It is a schematic diagram of the structure of the memory alloy mesh ring in an embodiment of the present invention;

[0030] Fig.12 for Fig.11 Top view of the memory alloy mesh;

[0031] Fig.13 for Fig.11 Schematic diagram of the structure of the middle top plate and ball bearing;

[0032] Fig.14 for Figure 7 , 9 , combined state diagram of 13;

[0033] Fig.15 for Figure 6 , 7 Occlusal diagram;

[0034] Fig.16 It is a schematic diagram of the torque of the anti-loosening bolt pair in the working state in the embodiment of the present invention;

[0035] In the figure:

[0036] 1- nut; 2- washer; 3- cover; 4- non-slip washer; 5- bolt; 6- nut; 7- limit slot; 8- screw hole; 9- memory alloy mesh; 10- bottom plate; 11- top plate; 12- buckle; 13- positive wedge-shaped teeth; 14- washer radial fine teeth; 15- reverse wedge-shaped teeth; 16- rotation groove; 17- bottom slide groove of cover; 18- bottom slide groove of washer; 19- radial fine teeth of washer; 20- annular slide groove; 21- steel ball; 22- ball hoop; 23- ball bearing; 24- nickel-titanium-niobium alloy filament; 25- hoop; 26- pile foundation; 27- column; 28- diagonal brace; 29- diagonal beam; 30- photovoltaic module; 31- purlin. DETAILED DESCRIPTION

[0037] The following specific embodiments may be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments. The embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0038] like Figure 1 As shown, a photovoltaic support with anti-loosening function includes a column 27 and diagonal braces 28 arranged obliquely on both sides thereof, the lower end of the diagonal brace 28 is connected to the column 27 through a connecting structure, the tops of the column 27 and the diagonal brace 28 are respectively connected to the middle and both sides of the diagonal beam 29, a photovoltaic assembly 30 is arranged on the top of the diagonal beam 29, and the photovoltaic assembly 30 is connected to the diagonal beam 29 through a connecting assembly; the connecting assembly includes an anti-loosening bolt pair and a purlin 31, the purlin 31 is fixed to the bottom of the photovoltaic assembly 30, and the purlin 31 is connected to the diagonal beam 29 through an anti-loosening bolt pair; the connecting structure includes two clamps 25 for cooperating with the column 27, and the ends of the two clamps 25 are fixed by anti-loosening bolt pairs. In the specific production, the column adopts a steel column, and the lower end of the steel column is fixed on the pile foundation 26; the anti-loosening bolt pair is used to connect and fix the various components, so as to achieve the purpose of anti-loosening and improve the stability and safety of the photovoltaic support.

[0039] In a specific embodiment of the present invention, Figure 2 , Figure 3 , Figure 4 and Figure 6As shown, the anti-loosening bolt pair includes a bolt 5, a combined gasket, an anti-skid washer 4 and a nut 6. One end of the bolt 5 is fixed with a nut 1, and the other end is threadedly matched with the nut 6. The combined gasket and the anti-skid washer 4 are both mounted on the bolt 5. The nut 1 and the combined gasket of the bolt 5 are respectively arranged on both sides of the connected part. The end surface of the combined gasket on one side in contact with the connected part is provided with a washer anti-skid pattern 19; an anti-skid washer 4 is arranged between the combined gasket and the nut 6, and the end surface of the anti-skid washer 4 on one side in contact with the nut 6 is provided with a gasket anti-skid pattern 14, and the end surface of the other side of the anti-skid washer 4 is provided with a reverse wedge-shaped tooth 15 engaged with the combined gasket, and the edges of the reverse wedge-shaped tooth 15 are provided with a rotation groove 16 that rotates with the combined gasket. When fixing the clamp, the connected part is the end of the clamp; when fixing the purlin, the connected part is the purlin and the diagonal beam. The anti-loosening bolt pair is applied to different parts of the photovoltaic bracket, and different connected parts are selected.

[0040] When designing specifically, Figure 2 , Figure 5 , Fig.10 As shown, the anti-skid pattern 19 of the washer hoop and the anti-skid pattern 14 of the washer are both concave radial fine teeth, which are used to increase the friction between the combined gasket and the connected part, and the anti-skid washer 4 and the nut 6. Among them, the cross section of the radial fine teeth is a 90° V-shaped groove.

[0041] As a preferred structure, Figure 2 , Figure 4 , Figure 7 As shown, the combined gasket includes a cover plate 3, a memory alloy mesh ring and a gasket hoop 2. The side wall of the gasket hoop 2 is provided with an annular inner cavity with an upper opening. The cover plate 3 is arranged at the open end of the annular inner cavity. The memory alloy mesh ring is arranged in the annular inner cavity, and its upper and lower end surfaces are respectively rotatably matched with the cover plate 3 and the bottom of the annular inner cavity; the surrounding of the cover plate 3 and the gasket hoop 2 are detachably connected through a clamping structure; the outer end surface of the cover plate 3 is provided with a positive wedge-shaped tooth 13 for engaging with the reverse wedge-shaped tooth 15 on the anti-slip gasket 4, and the inclined surfaces of the upper and lower wedge-shaped teeth cooperate to exert a wedge-shaped bite effect, such as Fig.15 The positive wedge-shaped teeth 13 protruding upward from the top of the cover sheet 3 overlap with the reverse wedge-shaped teeth 15 at the bottom of the anti-skid washer 4 and fit along the inclined surface, so that when the anti-skid washer 4 rotates, the inclined surface of the reverse wedge-shaped teeth 15 squeezes the lower cover sheet 3, and the reverse wedge-shaped teeth 15 and the positive wedge-shaped teeth 13 fit together to form a secondary anti-loosening structure.

[0042] When designing specifically, Figure 4 , Figure 7-10As shown, the snap-fit ​​structure includes multiple groups of snaps 12 and limiting slots 7. Multiple snaps 12 are arranged at intervals and protrudingly on the edges of the cover sheet 3. The limiting slots 7 are arranged at intervals on the outer wall of the gasket 2. The snaps 12 around the cover sheet 3 can be inserted into the limiting slots 7 around the gasket 2. The cover sheet 3 is inserted into the limiting slots 7 around the gasket 2 through the snaps 12 and is sleeved with the gasket 2 as a whole to prevent the cover sheet 3 from rotating. In specific production, the snaps 12 are long rectangular blocks, the limiting slots 7 are corresponding rectangular slots, and the limiting slots 7 are notched slots that are open on the outside and pass through from top to bottom.

[0043] In a specific embodiment of the present invention, Figure 11-14 As shown, the memory alloy mesh ring includes a bottom plate 10, a top plate 11 and a memory alloy mesh 9 therebetween, wherein the memory alloy mesh 9 is composed of nickel-titanium-niobium alloy filaments arranged in a honeycomb and spider web bionic structure, wherein the top plate 11 and the bottom plate 10 are connected to the upper and lower surfaces of the memory alloy mesh 9 on opposite sides thereof, and the bottom plate 10 and the top plate 11 are provided with an annular slide groove 20 on the outward side thereof, wherein a ball bearing 23 is provided in the annular slide groove 20, and a cover plate bottom slide groove 17 cooperating with the ball bearing 23 is provided on the inner end surface of the cover plate 3, and a washer bottom slide groove 18 cooperating with the ball bearing 23 is provided at the bottom of the annular inner cavity of the washer 2, and the cover plate 3 and the bottom of the annular inner cavity are respectively in contact with the ball bearing 23. Among them, the nickel-titanium-niobium alloy filaments can provide a reaction force along the bolt direction for the secondary anti-loosening structure composed of the cover plate 3 and the anti-slip washer, thereby preventing the relative sliding of the slope difference between the wedge-shaped teeth and the thread, thereby preventing the reduction of the preload force. In addition, the mesh arrangement of the memory alloy mesh 9 adopts a bionic structure of a honeycomb and a spider web, which can provide sufficient support force while effectively reducing the impact of concentrated loads and has better torsion resistance.

[0044] Since the nickel-titanium-niobium alloy filaments have the characteristics of superelasticity and shape memory effect, and the shape memory effect adopts a one-way shape memory effect. Shape memory alloys can be divided into three phases at the microscopic level: non-twinned martensite, twinned martensite and austenite. When the temperature reaches the austenite phase transition temperature, it exhibits superelasticity. When the temperature exceeds the martensite phase transition temperature, the alloy triggers the shape memory effect and restores the original form under the high temperature state during the heat treatment process. Therefore, when the bolt is at a natural general temperature and a low temperature state, the memory alloy mesh 9 exhibits superelastic properties, providing reverse pressure to the cover plate 3, the anti-skid washer 4 and the nut 6, increasing friction and preventing the wedge teeth from sliding relative to each other; when the bolt is at a high temperature and reaches the martensite phase transition temperature, the alloy will also trigger the shape memory effect, further increasing the friction between the cover plate 3, the anti-skid washer 4 and the nut 6, fixing the wedge teeth to keep the preload unchanged, thereby achieving an anti-loosening effect.

[0045] When making specific Fig.11 , 13As shown, the ball bearing 23 includes a plurality of steel balls 21 arranged in an annular shape and a ball hoop 22 for limiting the position of the steel balls 21, and the size of the ball hoop 22 is slightly larger than the steel balls 21, so that the steel balls 21 can roll freely in the ball hoop 22; a plurality of steel ball hoop 22 are connected by a connecting frame and arranged in an annular groove 20 in an annular shape. In this embodiment, the ball bearings 23 on the bottom plate 10 and the top plate 11 are both two circles, and the bottom groove 17 of the cover plate and the bottom groove 18 of the washer hoop are correspondingly two circles. The steel balls 21, the connecting frame and the ball hoop 22 in the ball bearing 23 are all made of stainless steel, which has excellent corrosion resistance, oxidation resistance, high temperature resistance and fatigue resistance, can work for a long time in harsh environments such as humidity, gas corrosion or high temperature, and are not prone to fatigue or fracture under repeated loads, thereby ensuring that the ball bearings of the photovoltaic bracket can work normally under various outdoor environmental conditions. In addition, the ball bearing 23 eliminates the torque force generated by the engagement of the positive wedge teeth 13 and the reverse wedge teeth 15 of the anti-slip washer 4 with the cover plate 3 by rolling in the bottom groove 17 of the cover plate and the bottom groove 18 of the washer hoop, thereby preventing the memory alloy mesh ring from being twisted during the tightening of the bolt.

[0046] The specific application process of the above anti-loosening bolt pair is as follows: the washer 2, the memory alloy mesh ring 9, the cover plate 3, the anti-skid washer 4 and the nut 6 are sequentially mounted on the bolt. In the process of tightening the nut, the washer 2 is fixed to the connected part by friction through the washer anti-skid pattern 19 at the bottom, and the nut 6 moves relative to the cover plate 3 through the washer anti-skid pattern 14 at the top of the anti-skid washer 4. The reverse wedge-shaped teeth 15 at the bottom of the anti-skid washer 4 and the forward wedge-shaped teeth 13 at the top of the cover plate 3 are engaged with each other to ensure the pre-tightening force of the bolt pair; continue to tighten the nut 6, the anti-skid washer 4 compresses the memory alloy mesh ring 9 in the washer 2 by squeezing the cover plate 3, and the memory alloy mesh ring 9 will squeeze the cover plate 3 and the anti-skid washer 4 in the direction of the bolt 5, and then squeeze the nut 6 in the reverse direction, thereby increasing the friction between the cover plate 3 and the anti-skid washer 4 and between the anti-skid washer 4 and the nut 6, preventing the pre-tightening force from changing and thus ensuring the overall stability of the anti-loosening bolt pair.

[0047] In the specific application process, the anti-loosening bolt pair provides pre-tightening force through the two-stage anti-loosening structure. The reference torque is shown in the figure. Fig.16 When the photovoltaic bracket is under a small vibration load, the vibration at the bracket connection node is small, and the pressure F is generated on the anti-slip washer 4 during the tightening of the nut 6. 压 and torque M 扭1 The superelasticity and shape memory effect of the memory alloy mesh ring provide a reverse force F for the cover plate 3, the anti-slip washer 4 and the nut 6. 抗 , F 抗The reverse force F acting on the cover plate 3 and the anti-skid washer 4 prevents the wedge-shaped teeth from sliding relative to each other due to the slope difference, thereby ensuring that the pre-tightening force remains unchanged and achieving a first-level anti-loosening effect; when the photovoltaic bracket is in extreme vibration, the bolts are seriously loosened. When the reverse force F provided by the memory alloy mesh ring 抗 When the angle β of the wedge-shaped teeth bevel of the positive wedge-shaped teeth 13 and the reverse wedge-shaped teeth 15 at the top of the cover piece 3 and the bottom of the anti-skid washer 4 is greater than the angle α of the bolt thread rise, the sliding of the cover piece 3 and the anti-skid washer 4 is limited due to the slope difference, and is only limited to the slope of the wedge-shaped teeth bevel, forming a wedge-shaped quality lock, ensuring that the bolt preload will not decrease, and the M transmitted downward by the nut 6 扭2 The positive wedge-shaped teeth 13 and the reverse wedge-shaped teeth 15 are engaged and squeezed up and down, so that the anti-skid washer 4 and the nut 6 produce friction, thereby achieving a secondary pre-tightening force fixing and anti-loosening effect.

[0048] In such Figure 1 In the specific embodiment shown, the connection points of the photovoltaic bracket include the connection between the steel column 27 and the pile foundation 26, the connection between the diagonal brace 28 and the steel column 27, the connection between the diagonal beam 29 and the diagonal brace 28, the connection between the column 27 and the diagonal beam 29, and the connection between the photovoltaic module 30 and the purlin 31. The connection between the steel column 27 and the diagonal brace 28 is mainly used to prevent the bracket from tilting or deforming under external loads. Therefore, an anti-loosening bolt pair is applied at the connection between the column 27 and the diagonal brace 28 to prevent the pre-tightening force from decreasing, ensure the firmness between the bolts and nuts and the hoop, and increase the stability of the photovoltaic bracket. At the same time, an anti-loosening bolt pair is also applied at the connection between the diagonal beam and the purlin to further improve the overall stability and safety of the photovoltaic bracket.

[0049] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A photovoltaic bracket with anti-loosening function, characterized in that: It includes a column and oblique braces arranged on both sides thereof, the lower end of the oblique brace is connected to the column through a connecting structure, the top of the column and the oblique brace are respectively connected to the middle part and both sides of the oblique beam, a photovoltaic component is provided on the top of the oblique beam, and the photovoltaic component is connected to the oblique beam through a connecting component; the connecting component includes an anti-loosening bolt pair and a purlin, the purlin is fixed to the bottom of the photovoltaic component, and the purlin is connected to the oblique beam through an anti-loosening bolt pair; the connecting structure includes two hoops for cooperating with the column, and the ends of the two hoops are fixed by an anti-loosening bolt pair.

2. The photovoltaic bracket with anti-loosening function according to claim 1, characterized in that: The anti-loosening bolt pair includes a bolt, a combined gasket, an anti-skid washer and a nut. One end of the bolt is fixed with a nut, and the other end is threadedly matched with the nut. The combined gasket and the anti-skid washer are both mounted on the bolt. The nut and the combined gasket of the bolt are respectively arranged on both sides of the connected part. The end surface of the combined gasket on the side in contact with the connected part is provided with a washer anti-skid pattern; an anti-skid washer is arranged between the combined gasket and the nut, and the end surface of the anti-skid washer on the side in contact with the nut is provided with a gasket anti-skid pattern, and the end surface of the other side of the anti-skid washer is provided with a reverse wedge-shaped tooth that engages with the combined gasket, and the edges around the reverse wedge-shaped tooth are provided with a rotation groove that rotates with the combined gasket.

3. A photovoltaic support with anti-loosening function according to claim 2, characterized in that: The anti-skid patterns of the washer hoop and the anti-skid patterns of the washer are both concave radial fine teeth, which are used to increase the friction between the combined gasket and the connected part, and between the anti-skid washer and the nut.

4. The photovoltaic support with anti-loosening function according to claim 2, characterized in that: The combined gasket comprises a cover plate, a memory alloy mesh ring and a gasket hoop; the side wall of the gasket hoop is provided with an annular inner cavity with an upper opening; the cover plate is arranged at the open end of the annular inner cavity; the memory alloy mesh ring is arranged in the annular inner cavity, and its upper and lower end surfaces are respectively rotatably matched with the cover plate and the bottom of the annular inner cavity; the four sides of the cover plate and the gasket hoop are detachably connected through a clamping structure; the outer end surface of the cover plate is provided with positive wedge-shaped teeth for engaging with the reverse wedge-shaped teeth on the anti-slip gasket.

5. The photovoltaic support with anti-loosening function according to claim 4, characterized in that: The snap-fit ​​structure includes multiple groups of snaps and limiting slots. Multiple snaps are spaced and protrudingly arranged on the edges of the cover plate. The limiting slots are spaced and arranged on the outer wall of the gasket. The snaps around the cover plate can be inserted into the limiting slots around the gasket.

6. The photovoltaic support with anti-loosening function according to claim 5, characterized in that: The buckle is a long rectangular block, the limiting slot is a corresponding rectangular slot, and the limiting slot is a notch slot that is open on the outside and runs through from top to bottom.

7. The photovoltaic support with anti-loosening function according to claim 4, characterized in that: The memory alloy mesh ring includes a bottom plate, a top plate and a memory alloy mesh therebetween, wherein the memory alloy mesh is composed of nickel-titanium-niobium alloy filaments arranged in a honeycomb and spider web bionic structure, and the top plate and the bottom plate are respectively connected to the upper and lower surfaces of the memory alloy mesh on one side opposite to the bottom plate, and an annular groove is provided on the outward side of the bottom plate and the top plate, and a ball bearing is provided in the annular groove, and a cover plate bottom groove matching the ball bearing is provided on the inner end surface of the cover plate, and a washer bottom groove matching the ball bearing is provided on the bottom of the annular inner cavity of the washer, and the cover plate and the bottom of the annular inner cavity are respectively in contact with the ball bearing.

8. The photovoltaic support with anti-loosening function according to claim 7, characterized in that: The ball bearing comprises a plurality of steel balls arranged in a ring shape and a ball hoop for limiting the position of the steel balls. The steel balls can roll in the ball hoop. The plurality of steel ball hoop are connected by a connecting frame and are arranged in a ring shape in an annular slide groove.

9. The photovoltaic support with anti-loosening function according to claim 7, characterized in that: The ball bearings on the bottom plate and the top plate each have two circles, and the bottom slide groove of the cover plate and the bottom slide groove of the washer hoop each have two circles.

10. A photovoltaic support with anti-loosening function according to any one of claims 4 to 9, characterized in that: During the process of tightening the nut, the washer is frictionally fixed to the connected part through the anti-slip grooves of the washer at the bottom, and the nut moves relative to the cover plate through the anti-slip grooves of the washer at the top of the anti-slip washer. The reverse wedge teeth at the bottom of the anti-slip washer and the forward wedge teeth on the top of the cover plate engage with each other to ensure the pre-tightening force of the bolt pair; continue to tighten the nut, and the anti-slip washer compresses and deforms the memory alloy mesh ring in the washer by squeezing the cover plate. The memory alloy mesh ring will squeeze the cover plate and the anti-slip washer in the reverse direction of the bolt, and then squeeze the nut in the reverse direction, thereby increasing the friction between the cover plate and the anti-slip washer and between the anti-slip washer and the nut, preventing the pre-tightening force from changing and thus ensuring the overall stability of the anti-loosening bolt pair.

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