Flexible photovoltaic support suitable for sloping roof

Abstract

The invention relates to the technical field of photovoltaic supports, in particular to a flexible photovoltaic support suitable for a sloping roof. Comprising mounting strips and connecting pieces connected with the mounting strips in a crossed mode. The connecting piece is connected with the roof through a fastening piece; the plurality of mounting strips are connected in a crossed manner to form a mounting frame for mounting a photovoltaic panel; the upper end face and the lower end face of the mounting strip are each provided with a storage groove. An elastic bag is fixedly connected in the storage groove; the gap between the edge of the photovoltaic panel and the roof is controlled to be blocked by the expanded elastic bag under the condition that the wind level around the photovoltaic panel is large, so that airflow cannot enter the back face of the photovoltaic panel, the stability of the photovoltaic panel on the roof is improved, and in addition, under the condition that the wind level around the photovoltaic panel is small, the photovoltaic panel is prevented from being blocked by the elastic bag. The elastic bag between the photovoltaic panel and the roof is controlled to be wizened, so that the gap between the back surface of the photovoltaic panel and the roof is exposed, and the heat dissipation requirement of the photovoltaic panel is met.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic brackets, and specifically to a flexible photovoltaic bracket suitable for a sloped roof. Background Art

[0002] Photovoltaic panels are often installed on buildings, and common locations include exterior walls and roofs. Roof types include flat roofs and sloped roofs, and sloped roofs are mostly composed of overlapping tiles. During installation, a transverse bracket and a longitudinal bracket are perpendicularly stacked on top of each other to form an installation frame, and the installation frame is connected to the tiles through installation parts such as fasteners, and then the photovoltaic panels are installed. In the prior art, although this installation method can fix the photovoltaic panels, due to the horizontal and vertical intersections of the brackets and the unevenness of the tiles, gaps will form between the photovoltaic panels and the roof tiles. When the wind is strong, the airflow generates an upward force through the gaps, easily overturning the photovoltaic panels, causing detachment and damage, triggering faults in the power generation system, and increasing maintenance costs. To solve the wind prevention problem, fillers are often used to fill the gaps. However, in the case of low wind and high temperature, this filling will hinder air circulation, preventing the photovoltaic panels from effectively dissipating heat, thereby affecting the working efficiency, and may also shorten the service life in the long run. Summary of the Invention

[0003] To make up for the deficiencies of the prior art, the present invention proposes a flexible photovoltaic bracket suitable for a sloped roof. When the wind level is relatively high around the photovoltaic panels, the present invention controls the gaps between the edges of the photovoltaic panels and the roof to be blocked by the inflated elastic sacs, so that the airflow cannot enter the back of the photovoltaic panels, improving the stability of the photovoltaic panels on the roof. Additionally, when the wind level is relatively low around the photovoltaic panels, the present invention controls the elastic sacs between the photovoltaic panels and the roof to deflate, so that the gaps between the back of the photovoltaic panels and the roof are exposed, meeting the heat dissipation requirements of the photovoltaic panels.

[0004] The technical solution adopted by the present invention to solve its technical problems is: A flexible photovoltaic bracket suitable for a sloped roof according to the present invention includes installation strips and connectors that cross-connect the installation strips; the connectors are connected to the roof through fasteners; a plurality of the installation strips are cross-connected to form an installation frame for installing photovoltaic panels; storage grooves are provided on both the upper and lower end faces of the installation strips; elastic sacs are fixedly connected in the storage grooves; the elastic sacs can be compressed and inflated and can deflate on their own; a threaded hole is recessed on one end face of the installation strip, and a threaded joint protrudes on the other end; the threaded hole on one of the installation strips is thread-sealed and connected to the threaded joint on another installation strip; the depth of the threaded hole is greater than that of the threaded joint; a first air hole communicates between the bottom of the threaded hole, the end face of the threaded joint, and the bottom of the storage groove on the same installation strip; an air charging and discharging component is connected to the threaded hole; the air charging and discharging component can inflate and deflate the inner side of the elastic sac.

[0005] Preferably, a step groove is provided inside the mounting strip; one end of the step groove is connected to the end face of the threaded joint through a second straight hole, and the other end is connected to the first air hole; a straight rod is movably connected in the second straight hole; the outer diameter of the straight rod is smaller than the inner diameter of the second straight hole, and the length of the straight rod is larger than the length of the second straight hole; one end of the second straight hole connected to the step groove abuts against a ball through a first spring; the first spring is located in the step groove; the ball is fixedly connected to the end of the straight rod; the first air hole at the bottom of the threaded hole and the second straight hole on the threaded joint are staggered.

[0006] Preferably, the charging and discharging assembly is composed of a shell, a fan blade, a main shaft and a piston plate; the shell is threadedly sealed with the threaded hole through a shell joint; a rotation groove is provided through the center of the shell; the two ends of the rotation groove pass through the shell through the main holes; the main shaft passes through the main hole and is rotatably connected with the main hole; the outer wall of the main shaft located in the rotation groove is fixedly connected to the cam; the inside of the shell is provided with driving grooves located on both sides of the rotation groove; the driving groove is connected with the rotation groove; the piston plate is slidingly sealed and connected in the driving groove; the piston plate divides the driving groove into a near groove close to the rotation groove and a far groove away from the rotation groove; the far groove is connected with the outer wall of the shell through a one-way air inlet hole, and the far groove is connected with the end of the shell joint through a one-way air outlet hole; the fan blade is connected to one end of the main shaft; there are four charging and discharging assemblies, which are respectively located at four positions of the photovoltaic panel and can independently control the elastic bags on the mounting strips at the four outermost edges of the photovoltaic panel; the outer wall of the shell is connected with the end of the shell joint through a pressure relief hole; the side of the piston plate away from the cam is connected to the wall of the driving groove through a second spring.

[0007] Preferably, the main shaft extends out of the main hole at one end facing the incoming wind and is slidably sleeved with the main sleeve; the anti-slip groove on the inner wall of the main sleeve is slidably connected to the anti-slip strip on the outer wall of the main shaft; the inner bottom wall of the main sleeve and the end of the main shaft are connected by a third spring; the fan blades are connected to the arc-shaped outer wall of the main sleeve; the outer wall of the shell is provided with an annular groove corresponding to the main sleeve; the end of the pressure relief hole is located in the annular groove; and the main sleeve can enter the annular groove.

[0008] Preferably, the main shaft is rotatably sealed to the main hole; and the rotating groove and the near groove are filled with medium.

[0009] Preferably, an adjustment hole with internal threads is provided through the center of the main shaft; the internal threads of the adjustment hole are connected to the adjustment bolt; one end of the third spring abuts against the inner bottom wall of the main sleeve, and the other end abuts against the adjustment bolt in the adjustment hole.

[0010] Preferably, the adjustment hole is threadedly and sealedly connected to the adjustment bolt; a gradient hole is provided through the inner bottom wall of the main sleeve toward the outside; the aperture of the gradient hole decreases as it moves away from the adjustment bolt; and the main sleeve is slidingly and sealingly connected to the main shaft.

[0011] Preferably, the end of the pressure relief hole is located on the arc-shaped inner wall of the annular groove; the arc-shaped outer wall of the main sleeve blocks the end of the pressure relief hole after entering the annular groove.

[0012] Preferably, an exhaust groove is provided at a position on the arc-shaped inner wall of the annular groove away from the pressure relief hole; the gas in the annular groove is discharged along the exhaust groove during the process of the main sleeve entering.

[0013] The beneficial effects of the present invention are as follows: 1. When the wind level is relatively high around the photovoltaic panel, the present invention controls the gap between the edge of the photovoltaic panel and the roof to be blocked by the inflated elastic bladder, so that the air flow cannot enter the back of the photovoltaic panel, improving the stability of the photovoltaic panel on the roof. Additionally, when the wind level is relatively low around the photovoltaic panel, the present invention controls the elastic bladder between the photovoltaic panel and the roof to deflate, so that the gap between the back of the photovoltaic panel and the roof is exposed, meeting the heat dissipation requirements of the photovoltaic panel.

[0014] 2. In the present invention, the wind forces in four directions of the photovoltaic panel can independently drive the elastic bladders on the mounting bars in four directions to expand, so as to ensure that the elastic bladder in one direction blocks the gap between the back of the photovoltaic panel and the roof, and the other edges of the photovoltaic panel remain exposed, thus taking into account both the safety and heat dissipation of the photovoltaic panel.

[0015] 3. By turning the adjusting bolt in the present invention, the sensitivity of the elastic bladder to block the gap between the back of the photovoltaic panel and the roof can be changed, thereby meeting different usage requirements of the photovoltaic panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below in conjunction with the drawings and embodiments.

[0017] Figure 1 is a three-dimensional view after the photovoltaic bracket installs the photovoltaic panel; Figure 2 is a three-dimensional view of the present invention; Figure 3 is Figure 2 the enlarged view of part A in Figure 4 is Figure 2 the enlarged view of part B in Figure 5 is a three-dimensional view of a single mounting bar and the charging and discharging assembly in the present invention; Figure 6 is Figure 5 the cross-sectional view of Figure 7 is a three-dimensional view of the charging and discharging assembly in the present invention; Figure 8 is Figure 7 the three-dimensional view from another angle; Figure 9 isFigure 7 Cross-sectional view; Figure 10 It is a position diagram of the anti-slip grooves and anti-slip strips in the invention.

[0018] In the figure: mounting strip 1, connecting piece 11, storage groove 12, elastic bladder 13, threaded hole 14, threaded joint 15, first air hole 16, step groove 17, second straight hole 18, photovoltaic panel 2, straight rod 3, first spring 31, spherical ball 32, housing 4, housing joint 41, rotating groove 42, main hole 43, driving groove 44, near groove 441, far groove 442, one-way air inlet hole 443, one-way air outlet hole 444, pressure relief hole 45, annular groove 46, exhaust groove 47, fan blade 5, main shaft 6, cam 61, anti-slip strip 62, adjustment hole 63, adjustment bolt 64, piston plate 7, second spring 71, main sleeve 8, anti-slip groove 81, third spring 82, tapered hole 83. Specific embodiments

[0019] In order to make the technical means, creative features, achieved purposes and effects realized by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0020] As Figures 1 to 10 shown, the present invention includes the following embodiments: Embodiment 1: A flexible photovoltaic bracket applicable to a sloping roof, including a mounting strip 1 and a connecting piece 11 that cross-connects the mounting strips 1; the connecting piece 11 is connected to the roof through fasteners (not shown in the figure); a plurality of the mounting strips 1 cross-connect to form a mounting frame (not labeled in the figure) for mounting the photovoltaic panel 2; storage grooves 12 are provided on both the upper end surface and the lower end surface of the mounting strip 1; an elastic bladder 13 is fixedly connected in the storage groove 12; the elastic bladder 13 can be compressed and expanded and can deflate by itself; a threaded hole 14 is recessed on one end surface of the mounting strip 1, and a threaded joint 15 protrudes on the other end; the threaded hole 14 on one of the mounting strips 1 is threadedly and hermetically connected to the threaded joint 15 on another mounting strip 1; the depth of the threaded hole 14 is greater than that of the threaded joint 15; the bottom of the threaded hole 14, the end surface of the threaded joint 15, and the bottom of the storage groove 12 on the same mounting strip 1 are communicated through a first air hole 16; a charging and discharging assembly (not labeled in the figure) is connected to the threaded hole 14; the charging and discharging assembly can inflate and deflate the inside of the elastic bladder 13.

[0021] In this embodiment, a step groove 17 is provided inside the mounting strip 1; one end of the step groove 17 is connected to the end face of the threaded joint 15 through a second straight hole 18, and the other end is connected to the first air hole 16; a straight rod 3 is movably connected inside the second straight hole 18; the outer diameter of the straight rod 3 is smaller than the inner diameter of the second straight hole 18, and the length of the straight rod 3 is greater than the length of the second straight hole 18; one end of the second straight hole 18 connected to the step groove 17 abuts against a ball 32 through a first spring 31; the first spring 31 is located in the step groove 17; the ball 32 is fixedly connected to the end of the straight rod 3; the first air hole 16 at the bottom of the threaded hole 14 and the second straight hole 18 on the threaded joint 15 are staggered.

[0022] Before installing the photovoltaic panel 2, the mounting strip 1 is assembled according to the specifications of the mounting frame. For example, if the mounting strip 1 is required to be longer, the threaded joint 15 of one mounting strip 1 is screwed into the threaded hole 14 of the other mounting strip 1. The straight rod 3 protruding from the end surface of the threaded joint 15 will be squeezed by the bottom of the threaded hole 14 inserted into the threaded joint 15. The first air hole 16 at the bottom of the threaded hole 14 is staggered from the straight rod 3 in the second straight hole 18 on the threaded joint 15. In this way, during the compression process of the supporting rod, the ball 32 will be compressed to move in the step groove 17, so that the ball 32 overcomes the first spring 31 and moves away from the end of the second straight hole 18 close to the step groove 17, so that the second straight hole 18 and the step groove 1 7 is kept connected, so that the first air holes 16 inside the two connected mounting strips 1 are kept connected, and then the connecting piece 11 is connected to the roof through a fastener, and the fastener can be a bolt, etc. After the connecting piece 11 is installed on the roof, the horizontal mounting strip 1 and the longitudinal mounting strip 1 are connected together through the connecting piece 11, and finally a cross frame-type mounting frame is formed, and then the photovoltaic panel 2 is installed on the mounting frame. For the convenience of description, the outermost mounting strips 1 in the four directions of the photovoltaic panel 2 are called peripheral mounting strips 1, and the threaded holes 14 on the peripheral mounting strips 1 are connected to the charging and discharging components; as the photovoltaic panel 2 works, the photovoltaic panel 2 will convert solar energy into electrical energy and store it in the battery, and the charging and discharging components will be connected to the charging and discharging components. When the wind level around the photovoltaic panel 2 is less than the threshold, the charging and discharging assembly will not inflate the connected and corresponding threaded holes 14, so that the elastic bag 13 on the mounting strip 1 will not expand, so that the gap formed between the edge of the photovoltaic panel 2 and the sloping roof is not blocked, so that the back of the photovoltaic panel 2 is exposed to the air, so as to achieve the purpose of heat dissipation on the back of the photovoltaic panel 2, thereby ensuring the working efficiency of the photovoltaic panel 2; when the wind level around the photovoltaic panel 2 is greater than the threshold, in order to prevent the photovoltaic panel 2 from being lifted up by the wind, the charging and discharging assembly will inject air into the connected threaded holes 14, and the threaded holes 14 connected to the charging and discharging assembly will be filled with gas during the air intake process. The first air hole 16 inside the connected mounting strip 1 eventually allows gas to enter the storage groove 12. As the air pressure in the storage groove 12 increases, the elastic capsule 13 will be compressed and expanded. The elastic capsule 13 located on the lower surface of the mounting strip 1 will be compressed and expanded to approach the roof surface. The elastic capsule 13 will eventually abut against the roof surface. The elastic capsule 13 located on the upper surface of the mounting strip 1 will be compressed and expanded to approach and abut against the back of the photovoltaic panel 2. In this way, the gap between the back of the photovoltaic panel 2 and the roof is blocked and blocked by the expanded elastic capsule 13. In this way, it is difficult for external gas to enter the gap between the roof and the back of the photovoltaic panel 2, so that the photovoltaic panel 2 on the roof is not easily blown away by the wind, thereby improving the stability of the photovoltaic panel 2.When the elastic capsules 13 on the mutually intersecting mounting bars 1 approach and expand towards each other, the intersecting positions of the two cannot expand. The expansion of the elastic capsules 13 at other positions limits the two intersecting mounting bars 1, making it difficult for the two intersecting mounting bars 1 to shift, thereby improving the connection strength and stability of the mounting bars 1. Since the straight rods 3 at the ends of the exposed mounting bars 1 will protrude from the corresponding second straight holes 18, the second straight holes 18 at the ends of the mounting bars 1 are blocked by the spherical balls 32 near one end corresponding to the step grooves 17, achieving the sealing of the ends of the mounting bars 1. In this way, the gas in the first air holes 16 will not leak. When the wind level around the photovoltaic panel 2 is less than the threshold, the charging and discharging assembly will stop inflating the first air holes 16. The charging and discharging assembly can leak air, and the gas in the storage groove 12 will enter the charging and discharging assembly along the first air holes 16 to achieve air leakage. The elastic capsules 13 will deflate and tighten under the action of their own elastic force. The gas inside the elastic capsules 13 is discharged during the contraction of the elastic capsules 13. After the elastic capsules 13 deflate, the gap between the back of the photovoltaic panel 2 and the roof will be exposed again to meet the heat dissipation requirements of the photovoltaic panel 2. In the present invention, when the wind level around the photovoltaic panel 2 is relatively high, it is controlled that the gap between the edge of the photovoltaic panel 2 and the roof is blocked by the inflated elastic capsules 13, so that the air flow cannot enter the back of the photovoltaic panel 2, improving the stability of the photovoltaic panel 2 on the roof. Additionally, when the wind level around the photovoltaic panel 2 is relatively low, it is controlled that the elastic capsules 13 between the photovoltaic panel 2 and the roof deflate, so that the gap between the back of the photovoltaic panel 2 and the roof is exposed to meet the heat dissipation requirements of the photovoltaic panel 2.

[0023] Embodiment 2: The charging and discharging assembly is composed of a housing 4, a fan blade 5, a main shaft 6, and a piston plate 7. The housing 4 is threadedly and hermetically connected to the threaded hole 14 through a housing joint 41. A rotating groove 42 is provided through the center of the housing 4. Both ends of the rotating groove 42 penetrate the housing 4 through main holes 43. The main shaft 6 passes through the main holes 43 and is rotatably connected to the main holes 43. A cam 61 is fixedly connected to the outer wall of the main shaft 6 located in the rotating groove 42. Drive grooves 44 are provided inside the housing 4 on both sides of the rotating groove 42. The drive grooves 44 communicate with the rotating groove 42. The piston plate 7 is slidably and hermetically connected in the drive grooves 44. The piston plate 7 divides the drive grooves 44 into a near groove 441 close to the rotating groove 42 and a far groove 442 far from the rotating groove 42. The far groove 442 communicates with the outer wall of the housing 4 through a one-way intake hole 443, and the far groove 442 communicates with the end of the housing joint 41 through a one-way outlet hole 444. The fan blade 5 is connected to one end of the main shaft 6. There are four charging and discharging assemblies, which are respectively located at four orientations of the photovoltaic panel 2 and can independently control the elastic capsules 13 on the mounting bars 1 at the four outermost edges of the photovoltaic panel 2. A pressure relief hole 45 communicates between the outer wall of the housing 4 and the end of the housing joint 41. A second spring 71 is connected between the side of the piston plate 7 away from the cam 61 and the groove wall of the drive groove 44.

[0024] In this embodiment, one end of the main shaft 6 facing the oncoming wind extends out of the main hole 43 and is sleeved with a main sleeve 8 in a sliding manner; the anti-slip groove 81 on the inner wall of the main sleeve 8 is slidably connected to the anti-slip strip 62 on the outer wall of the main shaft 6; the inner bottom wall of the main sleeve 8 and the end of the main shaft 6 are connected by a third spring 82; the fan blade 5 is connected to the arc-shaped outer wall of the main sleeve 8; an annular groove 46 corresponding to the main sleeve 8 is provided on the outer wall of the housing 4; the end of the pressure relief hole 45 is located in the annular groove 46; the main sleeve 8 can enter the annular groove 46.

[0025] Another embodiment of the charging and discharging assembly is an air pump.

[0026] The photovoltaic panel 2 is provided with charging and discharging components in all four directions. The charging and discharging components independently control the elastic capsules 13 on the mounting bars 1 in the four directions of the photovoltaic panel 2. Taking the wind direction flowing from left to right as an example, for the convenience of description, the charging and discharging components facing the four directions are respectively the leftward charging and discharging component, the backward charging and discharging component, the rightward charging and discharging component, and the forward charging and discharging component. Since the wind direction is from left to right, only the rotation of the fan blades 5 on the leftward charging and discharging component will drive the main sleeve 8 to approach the corresponding housing 4. The anti-slip grooves 81 on the inner wall of the main sleeve 8 slide with the anti-slip strips 62 on the outer wall of the main shaft 6. When the main sleeve 8 approaches the housing 4, it will overcome the elastic force of the third spring 82. When the end of the main sleeve 8 approaches the housing 4, it will enter the annular groove 46 to block the orifice of the pressure relief hole 45. As the fan blades 5 rotate, the main sleeve 8 and the main shaft 6 will rotate. During the rotation of the main shaft 6, the cam 61 on the outer wall will rotate. During the rotation of the cam 61, it will intermittently squeeze the piston plate 7 away from the main shaft 6. When the cam 61 enters the near groove 441 from the rotating groove 42, it will squeeze the piston plate 7. The piston plate 7 being pressed will overcome the second spring 71 and move away from the main shaft 6, so that the space of the corresponding far groove 442 becomes smaller. The gas in the space of the far groove 442 is compressed and will flow into the threaded hole 14 on the mounting bar 1 along the one-way air outlet hole 444. Since the pressure relief hole 45 is blocked, the gas cannot leak out. The gas will enter the storage groove 12 along the first air hole 16. The continuous rotation of the cam 61 will cause the piston plate 7 to be intermittently squeezed. When there is no extrusion of the cam 61 on the piston plate 7, the second spring 71 will push the piston plate 7 close to the main shaft 6, so that the space in the far groove 442 becomes larger to form a negative pressure. The outside air will enter the far groove 442 along the one-way air inlet hole 443, so that the gas in the far groove 442 is replenished, preparing for the next injection of gas by squeezing the far groove 442. In this way, the elastic capsule 13 on the mounting bar 1 connected to the leftward charging and discharging component will expand, so that the air flow from left to right cannot pass through the expanded elastic capsule 13 and enter the inner side of the photovoltaic panel 2, realizing the protection of the photovoltaic panel 2; for the charging and discharging components in other directions, even if the fan blades 5 rotate, the fan blades 5 cannot drive the main sleeve 8 to block the corresponding pressure relief hole 45. In this way, even when the elastic capsule 13 is inflated inside, the pressure relief hole 45 will relieve the pressure, ensuring that the elastic capsules 13 in other directions of the photovoltaic panel 2 do not bulge, so that the other edges of the photovoltaic panel 2 maintain the heat dissipation effect, taking into account both the safety and heat dissipation of the photovoltaic panel 2; finally, when the wind level from left to right decreases, the main sleeve 8 moves out of the annular groove 46 under the action of the elastic force of the third spring 82, releasing the blockage of the pressure relief hole 45. In this way, the air flow inside the expanded elastic capsule 13 can smoothly discharge along the pressure relief hole 45, making the expanded elastic capsule 13 deflated, and forming a gap again between the left edge of the photovoltaic panel 2 and the roof to ensure the heat dissipation requirement of the photovoltaic panel 2.

[0027] Embodiment 3: The main shaft 6 is rotationally and sealingly connected to the main hole 43; the rotating groove 42 and the near groove 441 are both filled with a medium.

[0028] During the rotation of the cam 61 along with the main shaft 6, the cam 61 will push one of the piston plates 7 to move away from the main shaft 6 against the elastic force of the corresponding second spring 71, causing the space of the near groove 441 corresponding to the piston plate 7 to expand to form a negative pressure. The liquid medium in the rotating groove 42 and the other near groove 441 will enter the near groove 441 with an expanded space. In this way, the space in the other near groove 441 will become smaller. Thus, every time the cam 61 pushes one of the piston plates 7, the space of one of the near grooves 441 will expand, and the space of the other near groove 441 will decrease. In this way, when one of the piston plates 7 is pushed, the other piston plate 7 can quickly reset, enabling the far groove 442 to quickly reset and inhale external gas in a timely manner, thereby improving the air injection efficiency of the charging and discharging assembly into the elastic bladder 13 on the mounting strip 1.

[0029] Embodiment 4: An adjusting hole 63 with internal threads is provided through the center of the main shaft 6; an adjusting bolt 64 is connected to the internal threads of the adjusting hole 63; one end of the third spring 82 abuts against the inner bottom wall of the main sleeve 8, and the other end abuts against the adjusting bolt 64 in the adjusting hole 63.

[0030] In this embodiment, the adjusting hole 63 is in threaded sealing connection with the adjusting bolt 64; a tapered hole 83 is provided through the inner bottom wall of the main sleeve 8 facing outward; the aperture of the tapered hole 83 decreases as it moves away from the adjusting bolt 64; the main sleeve 8 is in sliding sealing connection with the main shaft 6.

[0031] Before enabling the charging and discharging assembly, first turn the adjusting bolt 64. During the turning process of the adjusting bolt 64, the position of the adjusting bolt 64 in the adjusting hole 63 will change. The main sleeve 8 is in sliding sealing connection with the main shaft 6 but will not separate. Therefore, the compression degree of the third spring 82 can be controlled. When the compression degree of the third spring 82 is relatively large, the resistance for the main sleeve 8 to enter the annular groove 46 is relatively large, so that the main sleeve 8 requires a relatively large wind force to enter the annular groove 46 and block the pressure relief hole 45 in the annular groove 46, causing the elastic bladder 13 to expand and block the gap between the back of the photovoltaic panel 2 and the roof at a relatively large wind level; similarly, if the compression degree of the third spring 82 is controlled to be relatively small, the resistance for the main sleeve 8 to enter the annular groove 46 is relatively small, so that the main sleeve 8 requires a relatively small wind force to enter the annular groove 46 and block the pressure relief hole 45 in the annular groove 46, causing the elastic bladder 13 to expand and block the gap between the back of the photovoltaic panel 2 and the roof at a relatively small wind level; thus, by turning the adjusting bolt 64, the sensitivity of the elastic bladder 13 to block the gap between the back of the photovoltaic panel 2 and the roof can be changed, thereby meeting the usage requirements of different photovoltaic panels 2; Under the action of the wind, the windward fan blade 5 drives the main sleeve 8 to rotate and approach the corresponding housing 4. During the process of the main sleeve 8 approaching the housing 4, the gas inside the main sleeve 8 is discharged along the tapered hole 83. The aperture of the tapered hole 83 decreases as it moves away from the adjusting bolt 64. Therefore, the speed at which the gas inside the main sleeve 8 is discharged along the tapered hole 83 is less than the speed at which the outside gas enters the inside of the main sleeve 8 along the tapered hole 83. Therefore, the main sleeve 8 can more easily enter the annular groove 46 under the action of the wind force to block the pressure relief hole 45. In the case where the wind force suddenly weakens, since the speed at which the outside gas enters the inside of the main sleeve 8 along the tapered hole 83 is slow, the main sleeve 8 will slowly move out of the annular groove 46, realizing a slower speed of moving away from the orifice of the pressure relief hole 45, so that the pressure relief hole 45 will not be exposed even when the wind force suddenly becomes smaller, ensuring the smooth inflation of the inner side of the elastic bladder 13 by the charging and discharging assembly.

[0032] Embodiment 5: The end of the pressure relief hole 45 is located on the arc-shaped inner wall of the annular groove 46; the arc-shaped outer wall of the main sleeve 8 blocks the end of the pressure relief hole 45 after entering the annular groove 46.

[0033] In this embodiment, an exhaust groove 47 is provided at a position on the arc-shaped inner wall of the annular groove 46 away from the pressure relief hole 45; the gas in the annular groove 46 is discharged along the exhaust groove 47 during the process of the main sleeve 8 entering.

[0034] During the process of the windward fan blade 5 driving the main sleeve 8 into the annular groove 46 under the action of the wind force, the gas in the annular groove 46 is compressed and discharged along the exhaust groove 47. The main sleeve 8 blocks the orifice of the pressure relief hole 45 on the arc-shaped inner wall of the annular groove 46. In this way, during the rotation of the main sleeve 8 with the fan blade 5, the main sleeve 8 will not affect the blocking effect on the pressure relief hole 45. The orifice of the pressure relief hole 45 is perpendicular to the arc-shaped outer wall of the main sleeve 8, so there will be no thrust on the main sleeve 8 away from the housing 4, ensuring the blocking effect of the orifice of the pressure relief hole 45 by the main sleeve 8 and making the inflation smoother.

[0035] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the Figure 1 orientation or positional relationship shown, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the protection scope of the present invention. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0036] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and what is described in the above embodiments and the specification is only to illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A flexible photovoltaic bracket suitable for a sloping roof, comprising a mounting bar and a connecting piece in which the mounting bars are cross-connected with each other; the connecting piece is connected to the roof by a fastener; a plurality of mounting bars are cross-connected to form a mounting frame for mounting photovoltaic panels; characterized in that: The upper end surface and the lower end surface of the mounting bar are both provided with storage grooves; an elastic bag is fixedly connected in the storage groove; a threaded hole is provided on one end surface of the mounting bar, and a threaded joint is provided on the other end; the threaded hole on one mounting bar is threadedly sealed with the threaded joint on the other mounting bar; the bottom of the threaded hole, the end surface of the threaded joint and the bottom of the storage groove on the same mounting bar are connected through the first air hole; the threaded hole is connected with a charging and discharging component; the charging and discharging component can inflate and deflate the inside of the elastic bag.

2. The flexible photovoltaic bracket suitable for a sloping roof according to claim 1, characterized in that: A step groove is arranged inside the mounting strip; one end of the step groove is connected to the end face of the threaded joint through the second straight hole, and the other end is connected to the first air hole; the gap in the second straight hole is movably connected to the straight rod; one end of the second straight hole connected to the step groove abuts against the ball through the first spring; the ball is fixedly connected to the end of the straight rod.

3. The flexible photovoltaic bracket suitable for a sloping roof according to claim 1, characterized in that: The charging and discharging assembly is composed of a shell, a fan blade, a main shaft and a piston plate; the shell is threadedly sealed with a threaded hole through a shell joint; a rotating groove is provided through the center of the shell; both ends of the rotating groove pass through the shell through the main holes; the main shaft passes through the main hole and is rotatably connected with the main hole; the outer wall of the main shaft located in the rotating groove is fixedly connected to the cam; driving grooves are provided on both sides of the rotating groove inside the shell; the driving groove is connected with the rotating groove; the piston plate is elastically slidingly sealed and connected in the driving groove; the piston plate divides the driving groove into a near groove close to the rotating groove and a far groove far away from the rotating groove; The distal groove is connected to the outer wall of the shell through a one-way air inlet hole, and the distal groove is connected to the end of the shell joint through a one-way air outlet hole; the fan blades are connected to one end of the main shaft; there are four charging and discharging components, which are respectively located at four positions of the photovoltaic panel and can independently control the elastic bags on the mounting strips at the four outermost edges of the photovoltaic panel; the outer wall of the shell and the end of the shell joint are connected through a pressure relief hole.

4. The flexible photovoltaic bracket suitable for a sloping roof according to claim 3, characterized in that: The main shaft extends out of the main hole at the windward end and is slidably sleeved with the main sleeve; the inner bottom wall of the main sleeve is connected to the end of the main shaft through a third spring; the fan blades are connected to the arc-shaped outer wall of the main sleeve; the outer wall of the shell is provided with an annular groove corresponding to the main sleeve; the end of the pressure relief hole is located in the annular groove.

5. The flexible photovoltaic bracket suitable for a sloping roof according to claim 3, characterized in that: The main shaft is connected to the main hole in a rotating seal; the rotating groove and the near groove are filled with medium.

6. The flexible photovoltaic bracket suitable for a sloping roof according to claim 4, characterized in that: An adjusting hole with internal threads is provided through the center of the main shaft; the internal threads of the adjusting hole are connected to the adjusting bolt; one end of the third spring abuts against the inner bottom wall of the main sleeve, and the other end abuts against the adjusting bolt in the adjusting hole.

7. The flexible photovoltaic bracket suitable for a sloping roof according to claim 6, characterized in that: The adjusting hole is threadedly and sealedly connected with the adjusting bolt; a gradient hole is penetrated outwardly through the inner bottom wall of the main sleeve; the aperture of the gradient hole decreases as it moves away from the adjusting bolt; the main sleeve is slidingly and sealingly connected with the main shaft.

8. The flexible photovoltaic bracket suitable for a sloping roof according to claim 4, characterized in that: The end of the pressure relief hole is located on the arc-shaped inner wall of the annular groove; the arc-shaped outer wall of the main sleeve shields the end of the pressure relief hole after entering the annular groove.

9. The flexible photovoltaic support suitable for a sloping roof according to claim 8, characterized in that: An exhaust groove is arranged on the arc-shaped inner wall of the annular groove away from the pressure relief hole; the gas in the annular groove is discharged along the exhaust groove during the main sleeve entering process.

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