CN114865997B - Adjustable prestress large-span flexible photovoltaic bracket and system - Google Patents

Abstract

The invention belongs to the field of photovoltaic supports, and discloses an adjustable prestress large-span flexible photovoltaic support and a system, wherein the flexible photovoltaic support comprises a plurality of support frames, a bearing cable assembly and a plurality of inhaul cable assemblies, and the support frames are arranged at intervals along a first direction; the bearing cable assembly comprises a first bearing cable, a second bearing cable, a stabilizing cable and an adjusting sleeve, wherein the first bearing cable and the second bearing cable are arranged at intervals along a second direction, two ends of the first bearing cable and the second bearing cable are respectively connected with two supporting frames through the adjusting sleeve, the length of the adjusting sleeve is adjustable, the stabilizing cable is positioned below the first bearing cable and the second bearing cable, and two ends of the stabilizing cable are respectively connected with the two supporting frames; the cable assembly comprises a first cable, a second cable and a connecting piece, wherein the first cable is connected with the first bearing cable and the connecting piece, the second cable is connected with the second bearing cable and the connecting piece, and the first cable is connected with the second cable and the stabilizing cable. The invention can improve the wind-absorbing and wind-pressure resistance, the integral rigidity of the structure and reduce the influence of wind vibration.

Description

An adjustable prestressed large-span flexible photovoltaic support and system

technical field

The invention relates to the field of photovoltaic supports, in particular to an adjustable prestressed large-span flexible photovoltaic support and a system.

Background technique

Most of the existing flexible photovoltaic support structures are double-cable system, three-cable+strut system or load-bearing cable+stabilizing cable system. Among them, the double-cable system has low rigidity, large mid-span deflection, weak wind resistance, and is prone to large vibrations. The three-cable + strut system is to add a stabilizing cable to the lower part of the two double cables, and add struts between the rows of photovoltaic arrays. Although this system increases the wind and snow resistance, reduces the mid-span deflection of the structure, and reduces the wind vibration of the structure, there are still problems such as insufficient structural wind absorption capacity, limited structural span, and high structural cost. The load-bearing cable + stabilizing cable system is a stabilizing cable with arching added to the lower part of the load-bearing cable. Although this system can increase the wind suction resistance of the structure and has good rigidity, it is difficult to ensure that the load-bearing cable of this system is in a horizontal and straight state, and the stabilizing cable is prone to relaxation under the action of wind pressure.

Contents of the invention

The purpose of the present invention is to provide an adjustable prestressed large-span flexible photovoltaic support and system. The present invention can not only improve the wind suction and wind pressure resistance, but also improve the overall rigidity of the structure and reduce the impact of wind vibration.

The technical scheme provided by the invention is as follows:

On the one hand, a flexible photovoltaic support is provided, including:

a plurality of supporting frames arranged at intervals along the first direction;

The load-bearing cable assembly includes a first load-bearing cable, a second load-bearing cable, a stabilizing cable, and a plurality of adjustment sleeves. The first load-bearing cable and the second load-bearing cable are arranged at intervals along a second direction, and the second direction is perpendicular to the first direction. One end of the first load-bearing cable and one end of the second load-bearing cable are respectively connected to one of the support frames through the adjustment sleeve. The prestress on the first load-bearing cable and the second load-bearing cable, the stability cable is located below the first load-bearing cable and the second load-bearing cable, and one end of the stability cable is connected to one of the support frames, and the other end is connected to the other support frame;

A plurality of cable assemblies are arranged at intervals along the first direction, and the cable assembly includes a first cable, a second cable and a connector, one end of the first cable is connected to the first load-bearing cable and one end of the connector, one end of the second cable is connected to the second load-bearing cable and the other end of the connector, and the other end of the first cable is connected to the other end of the second cable and the stabilizing cable.

In some embodiments, the adjusting sleeve includes sequentially connecting a first connecting rod, a sleeve, and a second connecting rod, one end of the first connecting rod is connected to the first load-bearing cable or the second load-bearing cable, the other end of the first connecting rod is threaded to one end of the sleeve, the other end of the sleeve is threaded to one end of the second connecting rod, and the other end of the second connecting rod is connected to the support frame.

In some embodiments, the adjusting sleeve further includes a pressure head, a fork lug and a pin shaft, one end of the pressure head is connected to the end of the first connecting rod away from the sleeve, the other end of the pressure head is connected to the first load-bearing cable or the second load-bearing cable; one end of the fork lug is connected to the end of the second connecting rod away from the sleeve, the other end of the fork lug is provided with a first through hole, a part of the support frame is inserted into the fork lug, and the support frame is provided with a second through hole corresponding to the first through hole, the pin shaft The fork ear and the support frame are fixedly connected through the first through hole and the second through hole.

In some embodiments, the connector is a rigid rod.

In some embodiments, the cable assembly further includes a first fixing member and two second fixing members, the first cable, the second cable and the stabilizing cable are connected by the first fixing member, one end of the connecting member, the first load-bearing cable and the first cable are fixedly connected by one second fixing member, and the other end of the connecting member, the second load-bearing cable and the second cable are fixedly connected by another second fixing member.

In some embodiments, the first fixing member includes a first cable clip and a second cable clip oppositely disposed;

One side of the first cable clip close to the second cable clip is provided with a first receiving groove, and the other side of the first cable clip is provided with a first lug; the side of the second cable clip close to the first cable clip is provided with a second receiving groove corresponding to the first receiving groove, and the other side of the second cable clip is provided with a second lug;

The stabilizing cable clamp is arranged between the first cable clamp and the second cable clamp and is located in the first receiving groove and the second receiving groove, the first cable is fixedly connected to the first lug, and the second cable is fixedly connected to the second lug.

In some embodiments, the second fixing member includes a third cable clip and a fourth cable clip oppositely disposed;

One side of the third cable clamp close to the fourth cable clamp is provided with a third receiving groove, and the other side of the third cable clamp is provided with a third lug and a fourth lug; the side of the fourth cable clamp close to the third cable clamp is provided with a fourth receiving groove corresponding to the third receiving groove;

The first load-bearing cable clamp is arranged between the third cable clamp and the fourth cable clamp and is located in the third receiving groove and the fourth receiving groove, the connecting member is fixedly connected to the third lug, and the first cable is fixedly connected to the fourth lug; or;

The second load-bearing cable clamp is arranged between the third cable clamp and the fourth cable clamp and is located in the third receiving groove and the fourth receiving groove, the connecting member is fixedly connected to the third lug, and the second cable is fixedly connected to the fourth lug.

In some embodiments, the number of the load-bearing cable assemblies is multiple, and the multiple load-bearing cable assemblies are arranged at intervals along the second direction.

In another aspect, there is also provided a photovoltaic system, comprising the flexible photovoltaic support described in any one of the above embodiments and a plurality of photovoltaic components, the plurality of photovoltaic components are arranged at intervals along the first direction on the first load-bearing cable and the second load-bearing cable.

In some embodiments, it further includes a pressing block and a clip, the pressing block is fixed on the first load-bearing cable or the second load-bearing cable through the clip, and the photovoltaic module is fixed on the pressing block.

Technical effect of the present invention is:

(1) The first load-bearing cable and the second load-bearing cable are respectively connected to the support frame through the adjustment sleeve, and the length of the adjustment sleeve can be adjusted, so that the prestress of the first load-bearing cable and the second load-bearing cable can be adjusted according to different wind load conditions and service life to change the vibration frequency of the photovoltaic support, so as to prevent the photovoltaic support from generating resonance and destroying the photovoltaic module under the action of wind load; , can improve the stability of the photovoltaic support, and then improve the wind resistance of the photovoltaic support.

(2) Rigid rods are arranged between the first load-bearing cable and the second load-bearing cable, which can prevent the first load-bearing cable and the second load-bearing cable from changing the distance between the first load-bearing cable and the second load-bearing cable due to the tension of the first and second load-bearing cables, and improve the stability of the photovoltaic support.

Description of drawings

Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

Fig. 1 is a top view of a flexible photovoltaic support provided by a specific embodiment of the application;

Fig. 2 is a structural schematic diagram of a photovoltaic system provided by a specific embodiment of the application in a top view;

Fig. 3 is the enlarged view of place A in Fig. 2;

Fig. 4 is the enlarged view of place A in Fig. 3;

Fig. 5 is a structural schematic diagram of a photovoltaic system provided by a specific embodiment of the application in a bottom-up perspective;

Figure 6 is an enlarged view at C in Figure 5;

Figure 7 is an enlarged view at D in Figure 5;

Fig. 8 is a cross-sectional view of an adjusting sleeve provided by a specific embodiment of the present application.

Explanation of reference numbers:

10, support frame; 11, column; 12, crossbar; 21, first load-bearing cable; 22, second load-bearing cable; 23, stabilizing cable; 24, adjustment sleeve; 241, first connecting rod; 242, sleeve; 243, second connecting rod; 244, pressure head; 245, fork ear; 246, pin shaft; 341, the first cable clip; 3411, the first lug; 342, the second cable clip; 3421, the second lug; 35, the second fixing piece; 351, the third cable clip; 3511, the third lug; 3512, the fourth lug; 352, the fourth cable clip;

Detailed ways

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the accompanying drawings required in the description of the embodiments or prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other accompanying drawings can also be obtained according to these drawings without creative work.

In order to make the drawing concise, each drawing only schematically shows the parts related to the present invention, and they do not represent the actual structure of the product. In addition, to make the drawings concise and easy to understand, in some drawings, only one of the components having the same structure or function is schematically shown, or only one of them is marked. Herein, "a" not only means "only one", but also means "more than one".

It should be further understood that the term "and/or" used in the specification of the present application and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

In this article, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediary, or it may be an internal connection between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

In addition, in the description of the present application, the terms "first", "second" and the like are only used to distinguish descriptions, and cannot be understood as indicating or implying relative importance.

In one embodiment of the present application, as shown in FIG. 1 and FIG. 2 , a flexible photovoltaic support includes a plurality of support frames 10 , a load-bearing cable assembly and a plurality of drag cable assemblies.

A plurality of support frames 10 are arranged at intervals along the first direction, and the distance between two adjacent support frames 10 can be set according to actual span requirements to meet different span requirements. The support frames 10 are used to support the load-bearing cable assembly, wherein the first direction is the X-axis direction shown in FIG. 2 .

As shown in Figure 1, load-bearing cable assembly comprises the first load-bearing cable 21, the second load-bearing cable 22, stabilizing cable 23 and a plurality of adjustment sleeves 24, and the first load-bearing cable 21 and the second load-bearing cable 22 are arranged at intervals along the second direction, and the second direction is perpendicular to the first direction. The other end of load-bearing cable 22 is connected with another support frame 10 through adjusting sleeve 24 respectively, by adjusting the length of adjustment sleeve 24 to adjust the prestress on the first load-bearing cable 21 and the second load-bearing cable 22, stabilizing cable 23 is positioned at the below of first load-bearing cable 21 and the second load-bearing cable 22, and one end of stabilizing cable 23 is connected with a support frame 10, and the other end is connected with another support frame 10.

Both ends of the first load-bearing cable 21 and the second load-bearing cable 22 are respectively arranged on the support frame 10 for supporting the photovoltaic module 40. The first load-bearing cable 21 and the second load-bearing cable 22 are respectively connected to the support frame 10 through the adjustment sleeve 24. In actual use, the length of the adjustment sleeve 24 can be changed according to different wind load conditions and service life to adjust the prestress on the first load-bearing cable 21, the second load-bearing cable 22 or the stabilizing cable 23, thereby changing the overall vibration frequency of the structure and preventing the flexible photovoltaic support from being subjected to wind loads. When resonance occurs, the photovoltaic module 40 is damaged.

The number of load-bearing cable assemblies can be one or more than two, and when the number of load-bearing cable assemblies is more than two, more than two load-bearing cable assemblies are arranged at intervals along the second direction. A plurality of photovoltaic components 40 can be arranged on each load cable component along the first direction.

As shown in Figure 4, a plurality of dragline assemblies are arranged at intervals along the first direction, and the dragline assemblies include a first dragline 31, a second dragline 32 and a connector 33, one end of the first dragline 31 is connected with one end of the first load-bearing cable 21 and the connector 33, one end of the second dragline 32 is connected with the other end of the second load-bearing cable 22 and the connector 33, and the other end of the first dragline 31 is connected with the other end of the second dragline 32 and the stabilizing cable 23.

Each cable assembly can form a stable triangle and connect the first load-bearing cable 21, the second load-bearing cable 22 and the stabilizing cable 23. The stabilizing cable 23 is used to keep the first load-bearing cable 21 and the second load-bearing cable 22 stable, reduce the shaking of the entire photovoltaic support under the action of wind, and then improve the wind resistance of the entire photovoltaic support.

In order to reduce the initial prestress value of the load-bearing cable 23, the first load-bearing cable 21 and the second load-bearing cable 22 have a certain radian of initial downward arch deflection. The stabilizing cable 23 has an initial arching deflection of a certain radian. Preferably, the stabilizing cable 23 can also be connected to the support frame 10 through the adjusting sleeve 24. By adjusting the length of the adjusting sleeve 24, the prestress on the stabilizing cable 23 can be changed, thereby changing the pull-down force on the first load-bearing cable 21 and the second load-bearing cable 22, and further improving the wind resistance of the photovoltaic support. The two ends of the stabilizing cable 23 can be arranged on the columns of the support frame 10 , and can also be arranged at the bottom of the support frame 10 .

Preferably, as shown in FIG. 3 , the support frame 10 includes a plurality of uprights 11 and a plurality of crossbars 12, the plurality of uprights 11 are arranged at intervals along the second direction, and a crossbar 12 is arranged obliquely on the top of each upright 11, and the plurality of uprights 11 are connected as a whole by reinforcing rods, and the plurality of crossbars 12 are also connected as a whole by reinforcing rods, and the crossbars 12 and the uprights 11 are also connected by reinforcing rods to improve the stability of the support frame. The first load-bearing cable 21 and the second load-bearing cable 22 are respectively connected to the crossbar 12, and the crossbar 12 is arranged obliquely so that the height of the first load-bearing cable 21 is higher than the height of the second load-bearing cable 22. After the photovoltaic module 40 is arranged on the first load-bearing cable 21 and the second load-bearing cable 22, the photovoltaic module 40 can be placed in an inclined state to face the sun.

Preferably, the bearing cable assembly further includes a first oblique cable 25 and a second oblique cable 26, one end of the first oblique cable 25 and the second oblique cable 26 are respectively fixed on the support frame 10 at the outermost edge, and the first oblique cable 25 is arranged corresponding to the first bearing cable 21, and the second oblique cable 26 is arranged corresponding to the second bearing cable 22, and the other ends of the first oblique cable 25 and the second oblique cable 26 are respectively fixed on the ground. Improve the rationality and economy of structural stress. In some embodiments, as shown in FIG. 8 , the adjusting sleeve 24 includes connecting a first connecting rod 241 , a sleeve 242 and a second connecting rod 243 sequentially. One end of the first connecting rod 241 is connected to the first load-bearing cable 21 or the second load-bearing cable 22 . The other end of the first connecting rod 241 is screwed to one end of the sleeve 242 .

The first connecting rod 241 and the second connecting rod 243 are threadedly connected with the sleeve 242 respectively. When the first connecting rod 241 and/or the second connecting rod 243 are rotated, the length of the entire adjusting sleeve 24 can be adjusted, thereby adjusting the prestress on the first load-bearing cable 21 or the second load-bearing cable 22.

As shown in Figure 8, the adjustment sleeve 24 also includes a pressure head 244, a fork ear 245 and a pin shaft 246. One end of the pressure head 244 is connected to the end of the first connecting rod 241 away from the sleeve 242, and the other end of the pressure head 244 is connected to the first load-bearing cable 21 or the second load-bearing cable 22; A part of the fork ear 245 is inserted into the fork ear 245, and the support frame 10 is provided with a second through hole corresponding to the first through hole.

During production, the indenter 244 is directly formed at the ends of the first load-bearing cable 21 and the second load-bearing cable 22, and the indenter 244 can be threadedly connected with the first connecting rod 241, or, during production, the indenter 244 is directly connected with the first connecting rod 241 as a whole, and only the first connecting rod 241 and the sleeve 242 need to be connected together during assembly.

The second connecting rod 243 is fixedly connected with a fork ear 245. After a part of the support frame 10 is inserted into the fork ear 245, the fork ear 245 and the support frame 10 are fixed together by the pin shaft 246, so as to realize the fixed connection between the adjustment sleeve 242 and the support frame 10, and the installation is convenient and quick.

In some embodiments, the connector 33 is a rigid rod. Arranging a rigid rod between the first load-bearing cable 21 and the second load-bearing cable 22 can prevent the first load-bearing cable 21 and the second load-bearing cable 22 from changing the distance between the first load-bearing cable 21 and the second load-bearing cable 22 under the tension of the first cable 31 and the second cable 32, thereby improving the stability of the photovoltaic support.

Further, as shown in FIG. 4 , the cable assembly also includes a first fixing part 34 and two second fixing parts 35, the first cable 31, the second cable 32 and the stabilizing cable 23 are connected by the first fixing part 34, one end of the connecting part 33, the first load-bearing cable 21 and the first cable 31 are fixedly connected by a second fixing part 35, and the other end of the connecting part 33, the second load-bearing cable 22 and the second cable 32 are fixedly connected by another second fixing part 35.

As shown in FIG. 6 , the first fixing member 34 includes a first cable clip 341 and a second cable clip 342 oppositely arranged; the first cable clip 341 is provided with a first receiving groove near the second cable clip 342, and the other side of the first cable clip 341 is provided with a first lug 3411; the second cable clip 342 is provided with a second receiving groove corresponding to the first receiving groove on one side near the first cable clip 341; Between 1 and the second cable clip 342 and located in the first receiving groove and the second receiving groove, the first cable 31 is fixedly connected to the first lug 3411 , and the second cable 32 is fixedly connected to the second lug 3421 .

The first cable clamp 341 and the second cable clamp 342 are fixed together by bolts, and the stabilizing cable 23 is sandwiched between the first cable clamp 341 and the second cable clamp 342 and located in the receiving hole formed by the first receiving groove and the second receiving groove, so as to fix the first fixing member 34 on the stabilizing cable 23 . The first cable clamp 341 is provided with a first lug 3411 , the second cable clamp 342 is provided with a second lug 2422 , the first cable 31 is connected to the first lug 3411 , and the second cable 32 is connected to the second lug 3421 to realize the connection of the first cable 31 , the second cable 33 and the stabilizing cable 23 .

As shown in FIG. 7 , the second fixing member 35 includes a third cable clip 351 and a fourth cable clip 352 oppositely arranged; the third cable clip 351 is provided with a third receiving groove near the fourth cable clip 352 , and the other side of the third cable clip 351 is provided with a third lug 3511 and a fourth lug 3512 ;

When the second fixing member 35 is arranged on the first load-bearing cable 21, the first load-bearing cable 21 is sandwiched between the third cable clamp 351 and the fourth cable clamp 352 and is located in the third receiving groove and the fourth receiving groove. It is arranged on the side of the first load-bearing cable 21 close to the second load-bearing cable 22 , the fourth cable clamp 352 is set on the side of the first load-bearing cable 21 away from the second load-bearing cable 22 , and the third cable clamp 351 is provided with a third lug 3511 and a fourth lug 3512 on a side close to the second load-bearing cable 21 . The connecting piece 33 is connected to the third lug 3511 on the third cable clamp 351 , and the first cable 31 is connected to the fourth lug 3512 on the third cable clamp 351 to fix the connecting piece 33 , the first cable 31 and the first bearing cable 21 together.

When the second fixing member 35 is arranged on the second load-bearing cable 22, the second load-bearing cable 22 is sandwiched between the third cable clamp 351 and the fourth cable clamp 352 and is located in the third receiving groove and the fourth receiving groove, the connecting member 33 is fixedly connected to the third lug 3511, and the second cable 32 is fixedly connected to the fourth lug 3512. The arrangement method of the second fixing member 35 on the second load-bearing cable 22 is the same as that on the first load-bearing cable 21 , and will not be repeated here.

The present invention also provides an embodiment of a photovoltaic system, as shown in FIGS. 1 to 8 , including the flexible photovoltaic support of any of the above embodiments and a plurality of photovoltaic components 40, and the plurality of photovoltaic components 40 are arranged at intervals along the first direction on the first load-bearing cable 21 and the second load-bearing cable 22. Each set of first load-bearing cables 21 and second load-bearing cables 22 is provided with a plurality of photovoltaic modules 40 at intervals along the first direction.

The photovoltaic module 40 is fixed by a pressure block 51 and a clamp 52. The clamp 52 is arranged on one side of the pressure block 51. The clamp 52 is fixedly connected to the pressure block 51 by bolts and the first load-bearing cable 21 or the second load-bearing cable 22 is sandwiched between the clamp 52 and the pressure block 51, so that the pressure block 51 is fixed on the first load-bearing cable 21 or the second load-bearing cable 22, and then the frame of the photovoltaic module 40 and the pressure block 51 are fixed by bolts to fix the two ends of the photovoltaic module 40 respectively. On the first load-bearing cable 21 and the second load-bearing cable 22 .

The installation method of the photovoltaic system of the present invention is as follows:

After the installation and positioning of the prefabricated pipe piles is completed, first the support frame 10 is fixedly installed on the ground, then the first oblique cable 25 and the second oblique cable 26 are installed at the corresponding positions of the support frame 10, and the first load-bearing cable 21 and the second load-bearing cable 22 are installed on the top of the support frame 10 through the adjustment sleeve 24. In order to reduce the initial prestress value of the first load-bearing cable 21 and the second load-bearing cable 22, so that the photovoltaic support can be close to the actual application, the first load-bearing cable 21 and the second load-bearing cable 22 have an initial arch deflection of a certain radian.

Then, the first load-bearing cable 21 and the second load-bearing cable 22 are connected to the stabilizing cable 23 by the first drag cable 31 and the second drag cable 32. The stabilizing cable 23 has an initial arch deflection of a certain radian. change.

After the above-mentioned components are installed, it is only necessary to stretch the stabilizing cable 23 and fix it on the column 11 of the support frame 10 or the bottom support of the support frame 10 , and then fix and install the photovoltaic module 40 through the clamp 52 and the pressure block 51 . Finally, by adjusting the adjustment sleeve 24 on the first load-bearing cable 21 and the second load-bearing cable 22, the initial stress value of the first load-bearing cable 21 and the second load-bearing cable 22 is changed to change the structural vibration frequency, so as to prevent the photovoltaic support from generating resonance under wind load and destroying the photovoltaic module 40.

The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications should also be considered as the protection scope of the present invention.

Claims (10)

1. An adjustable prestressed large-span flexible photovoltaic support, characterized in that it includes: a plurality of supporting frames arranged at intervals along the first direction; The load-bearing cable assembly includes a first load-bearing cable, a second load-bearing cable, a stabilizing cable and a plurality of adjustment sleeves, the first load-bearing cable and the second load-bearing cable are arranged at intervals along the second direction, the second direction is perpendicular to the first direction, the stabilizing cable is located below the first load-bearing cable and the second load-bearing cable, and one end of the stabilizing cable is connected to one of the support frames, and the other end is connected to the other support frame; the adjustment sleeve is connected to the support frame and at least one of the first load-bearing cable, the second load-bearing cable and the stabilizing cable, adjusting the length of the adjusting sleeve to adjust the prestress on the first bearing cable, the second bearing cable or the stabilizing cable; A plurality of cable assemblies are arranged at intervals along the first direction. The cable assembly includes a first cable, a second cable and a connector. One end of the first cable is connected to the first load-bearing cable and one end of the connector. The initial camber deflection in radians. 2. An adjustable prestressed large-span flexible photovoltaic support according to claim 1, wherein the adjusting sleeve includes sequentially connecting a first connecting rod, a sleeve and a second connecting rod, one end of the first connecting rod is connected to the first load-bearing cable, the second load-bearing cable or the stabilizing cable, the other end of the first connecting rod is threaded to one end of the sleeve, the other end of the sleeve is threaded to one end of the second connecting rod, and the other end of the second connecting rod is connected to the support frame. 3. An adjustable prestressed large-span flexible photovoltaic support according to claim 2, wherein the adjusting sleeve further comprises a pressure head, a fork and a pin shaft, one end of the pressure head is connected to the end of the first connecting rod away from the sleeve, the other end of the pressure head is connected to the first load-bearing cable or the second load-bearing cable; one end of the fork lug is connected to the end of the second connecting rod away from the sleeve, the other end of the fork lug is provided with a first through hole, and a part of the support frame is inserted into the fork lug. The supporting frame is provided with a second through hole corresponding to the first through hole, and the pin shaft is passed through the first through hole and the second through hole to fixedly connect the fork ear and the supporting frame. 4. An adjustable prestressed large-span flexible photovoltaic support according to any one of claims 1 to 3, characterized in that the connecting member is a rigid rod. 5. An adjustable prestressed large-span flexible photovoltaic support according to claim 4, wherein the cable assembly further comprises a first fixing member and two second fixing members, the first cable, the second cable and the stabilizing cable are connected by the first fixing member, one end of the connecting member, the first load-bearing cable and the first cable are fixedly connected by a second fixing member, and the other end of the connecting member, the second load-bearing cable and the second cable are fixedly connected by another second fixing member. 6. An adjustable prestressed large-span flexible photovoltaic support according to claim 5, characterized in that, The first fixing member includes a first cable clip and a second cable clip oppositely arranged; One side of the first cable clip close to the second cable clip is provided with a first receiving groove, and the other side of the first cable clip is provided with a first lug; the side of the second cable clip close to the first cable clip is provided with a second receiving groove corresponding to the first receiving groove, and the other side of the second cable clip is provided with a second lug; The stabilizing cable clamp is arranged between the first cable clamp and the second cable clamp and is located in the first receiving groove and the second receiving groove, the first cable is fixedly connected to the first lug, and the second cable is fixedly connected to the second lug. 7. An adjustable prestressed large-span flexible photovoltaic support according to claim 5, characterized in that, The second fixing member includes a third cable clip and a fourth cable clip oppositely arranged; One side of the third cable clamp close to the fourth cable clamp is provided with a third receiving groove, and the other side of the third cable clamp is provided with a third lug and a fourth lug; the side of the fourth cable clamp close to the third cable clamp is provided with a fourth receiving groove corresponding to the third receiving groove; The first load-bearing cable clamp is arranged between the third cable clamp and the fourth cable clamp and is located in the third receiving groove and the fourth receiving groove, the connecting member is fixedly connected to the third lug, and the first cable is fixedly connected to the fourth lug; or; The second load-bearing cable clamp is arranged between the third cable clamp and the fourth cable clamp and is located in the third receiving groove and the fourth receiving groove, the connecting member is fixedly connected to the third lug, and the second cable is fixedly connected to the fourth lug. 8 . The adjustable prestressed large-span flexible photovoltaic support according to any one of claims 1 to 3 , wherein there are multiple load-bearing cable assemblies, and the multiple load-bearing cable assemblies are arranged at intervals along the second direction. 9. An adjustable prestressed large-span flexible photovoltaic support system, characterized in that it comprises the adjustable prestressed large-span flexible photovoltaic support according to any one of claims 1-8 and a plurality of photovoltaic components, and the plurality of photovoltaic components are arranged at intervals along the first direction on the first load-bearing cable and the second load-bearing cable. 10. An adjustable prestressed large-span flexible photovoltaic support system according to claim 9, further comprising a pressure block and a clamp, the pressure block is fixed on the first load-bearing cable or the second load-bearing cable through the clamp, and the photovoltaic module is fixed on the pressure block.