Photovoltaic flexible support stabilizing cable rapid tensioning device and construction method

Abstract

The present invention discloses a photovoltaic flexible support stabilizing cable rapid tensioning device and construction method, which relates to the field of photovoltaic power generation technology. The rapid tensioning device is applicable to a photovoltaic flexible support system composed of at least a central column, a stabilizing cable, a load-bearing cable and a diagonal cable. The rapid tensioning device includes a balancing clamp, a balancing steel bar and a connecting device. The lower end of the balancing steel bar is fixed to the central column through the balancing clamp, and the upper end of the balancing steel bar is fixed to the load-bearing cable of the adjacent span of the tensioned stabilizing cable through the connecting device. When the stabilizing cable is tensioned, the present invention transmits the unbalanced force generated by the stabilizing cable on the column to the load-bearing cable through the balancing steel bar and the connecting device, and the diagonal cable at the end of the load-bearing cable offsets the unbalanced force and the unbalanced bending moment generated by it, thereby achieving one-time tensioning of the stabilizing cable to the designed prestressing force under the premise of protecting the safety of the column, thereby reducing the construction steps and complexity.

Description

Technical Field

[0001] The invention relates to the technical field of photovoltaic power generation, and in particular to a photovoltaic flexible support stabilizing cable rapid tensioning device and a construction method. Background Art

[0002] Photovoltaic flexible bracket is a new type of flexible structure supporting photovoltaic modules. Compared with traditional photovoltaic brackets, it has the characteristics of low steel consumption, small number of pile foundations, and high clearance. It has been widely used in engineering in recent years. Usually, photovoltaic flexible brackets include prestressed load-bearing cables supporting photovoltaic modules, stabilizing cables controlling bracket deflection, column structures supporting the entire system, and inclined cable structures. During the prestressed cable tensioning construction process, the cable structure needs to be tensioned in stages, and the pre-tension of the cables on both sides of the column is increased step by step by 3-5 times to ensure the tension balance of the cables on both sides of the column, so as to avoid damage to the column due to excessive bending moment. The load-bearing cable spans the entire photovoltaic array, and each cable can be up to 300-700 meters long. The tensioning work is relatively small at both ends of the cable structure, but the stabilizing cable needs to be tensioned separately in each span, and the length of a single cable is 30-40 meters. The tensioning work is 10-20 times that of the load-bearing cable, which requires a lot of manpower and time, and it is easy to cause imbalance of cable tension due to construction errors, resulting in damage to the column or steel structure.

[0003] Patent CN 109379022A discloses a construction method and a load-bearing beam for a flexible photovoltaic support, and proposes that when installing the load-bearing cable, the load-bearing cable is loaded and tensioned in stages. When the tensioning force is close to the control stress, both ends are tensioned simultaneously until 100% of the control stress is reached, and the load is held for 2 minutes; Patent CN116505845A discloses a photovoltaic flexible support and a layout method that can be tensioned and arranged in multiple stages, and proposes a tension-resistant support and a tension-resistant balance support to solve the problem of prestressed cable length being too long and causing the prestressed cable to decay in the middle. The above two patents provide a prestressed cable tensioning method from the perspective of ensuring construction safety, but do not solve the problems of complex construction procedures and low construction efficiency caused by the graded tensioning of stable cables. An efficient, fast, and safe tensioning method and device for photovoltaic flexible supports is a technical problem that needs to be solved urgently in the industry. Summary of the invention

[0004] In order to solve the deficiencies existing in the prior art, the purpose of the present invention is to propose a rapid tensioning device and construction method for the stabilizing cable of a photovoltaic flexible support. The most important feature of the device and method is the use of a balancing clamp. When the stabilizing cable is tensioned, the unbalanced force generated by the stabilizing cable on the column is transmitted to the load-bearing cable through the balancing steel bar and the connecting device, and the unbalanced force and the unbalanced bending moment generated by it are offset by the inclined cable at the end of the load-bearing cable, thereby achieving one-time tensioning of the stabilizing cable to the designed prestress while protecting the safety of the column, thereby reducing the construction steps and complexity.

[0005] A photovoltaic flexible support stabilizing cable rapid tensioning device, the rapid tensioning device is suitable for a photovoltaic flexible support system consisting of at least a central column, a stabilizing cable, a load-bearing cable and a diagonal cable, the rapid tensioning device comprises a balancing hoop, a balancing steel bar and a connecting device, the lower end of the balancing steel bar is fixed to the central column through the balancing hoop, and the upper end of the balancing steel bar is fixed to the load-bearing cable of the adjacent span of the tensioning stabilizing cable through the connecting device.

[0006] Preferably, the balancing hoop includes a hoop body installed on the top of the central column, a connecting plate is installed on the outer wall of the hoop body, a slot is opened on the connecting plate for the balancing steel bar to be embedded, a limiting clamping plate is installed on the slot, a limiting end plate is arranged at the lower end of the balancing steel bar, the limiting end plate is located on the inner side of the slot and forms a limiting matching relationship with the slot and the limiting clamping plate.

[0007] Preferably, slots for embedding the balancing steel bars are provided in different directions of the connecting plate.

[0008] Preferably, the hoop body is composed of a semicircular fastening hoop and a semicircular connecting hoop, or is composed of two semicircular connecting hoop, and the connecting plate is installed on the outer wall of the connecting hoop.

[0009] Preferably, the length of the balancing steel bar is adjustable.

[0010] Preferably, the balancing steel bar comprises a first section of steel bar, a second section of steel bar and a connecting sleeve, the upper end of the first section of steel bar extends into the interior of the connecting sleeve and is threadedly connected thereto, the lower end of the first section of steel bar is fixed to the balancing clamp through a limiting end plate, the upper end of the second section of steel bar is fixed to the load-bearing cable through the connecting device, the lower end of the second section of steel bar extends into the interior of the connecting sleeve and is threadedly connected thereto, and the thread rotation direction of the connecting sleeve is opposite to that of the first section of steel bar and the second section of steel bar.

[0011] Preferably, the first section of steel bars and the second section of steel bars are both prestressed cables.

[0012] Preferably, the connecting device includes a detachable lower part and an upper part of the connecting device, the contact surfaces of the lower part and the upper part of the connecting device are installed with steel strand anchors fixed to the load-bearing cable, the lower part of the connecting device is provided with a first hole for the balance steel bar to pass through, a rotation auxiliary plate is installed around the first hole, and a steel bar limiting sleeve threadedly connected to the upper end of the balance steel bar is abutted on the outer side of the rotation auxiliary plate.

[0013] Preferably, the connecting device also includes an anchor limiting plate for limiting the falling off of the steel strand anchor, the anchor limiting plate includes a lower portion of the anchor limiting plate fixed to the lower portion of the connecting device and an upper portion of the anchor limiting plate fixed to the upper portion of the connecting device, and the contact surface between the upper portion of the anchor limiting plate and the lower portion of the anchor limiting plate is provided with a second hole, the diameter of the second hole is larger than the diameter of the load-bearing cable but smaller than the diameter of the steel strand anchor.

[0014] A construction method for a photovoltaic flexible support stabilizing cable rapid tensioning device comprises the following steps:

[0015] S1, load-bearing cables and inclined cables are tensioned in stages to the designed pre-tension and tightened; when the Nth span needs to be tensioned for the stabilizing cables, a quick tensioning device is installed in the N+1 span;

[0016] S2. Install a balancing hoop on the top of the center column. The hoop is connected with bolts. The allowable tension of the bolts should satisfy the following formula:

[0017]

[0018] Among them: F 1 is the allowable tensile force of the bolt, N 1 The number of clamp fastening bolts, n is the safety factor and should not be less than 2, F w Design pretension of the stabilizing cable, N 2 The number of balancing steel bars connected to a single balancing hoop;

[0019] S3. Install the limit end plate on the balance steel bar to the slot, install the limit clamping plate, and install the connecting sleeve on the first section of steel bar without tightening it temporarily;

[0020] S4. Install the strand anchor at the designated position of the load-bearing cable. The principle of position selection is that the angle between the balance steel bar and the load-bearing cable is not greater than 10 degrees. After the anchor is installed, tighten the upper and lower parts of the connecting device with bolts and hold the anchor tightly, and then install the anchor limit plate;

[0021] S5. Pass the top of the second section of steel bar through the first hole at the bottom of the connecting device, install the steel bar limiting sleeve, install the lower end of the second section of steel bar on the connecting sleeve, tighten the sleeve, so that the balance steel bar tightens the middle column and the load-bearing cable. The allowable tension of the balance steel bar should meet the following formula:

[0022]

[0023] Among them: F 2 To balance the allowable tensile force of the steel bars;

[0024] S6. Install stabilizing cables in the adjacent span where the rapid tensioning device is installed, and tension them. During the tensioning process, closely observe the deformation of the columns and beams until the pretension reaches the designed value;

[0025] S7. Repeat steps 2-6 at span N+2. After the tensioning is completed, remove the quick tensioning device at span N+1 and repeat the installation at the next span.

[0026] The present invention has the following advantages and beneficial effects:

[0027] 1. During the tensioning process of the stabilizing cables of the photovoltaic flexible support, in order to avoid damage to the columns and beams due to the unbalanced force caused by the tensioning, the stabilizing cables accounting for more than 70% of the number of cables need to be tensioned 3-5 times to the designed pre-tensioning force. The process is complicated and consumes time and manpower. The present invention proposes a tensioning load adjustment device to transfer the unbalanced force generated during the tensioning process of the stabilizing cables to the load-bearing cables and balance them through the inclined cables, so that the stabilizing cables can be tensioned to the designed value at one time, simplifying the construction process. According to the conventional scheme, the stabilizing cables are tensioned three times in stages. The present invention can save 2 / 3 of the tensioning time. For large-scale projects, the tensioning time of 100 days is shortened to 33 days.

[0028] 2. The balancing hoop proposed in the present invention can connect a single or multiple balancing steel bars. When connecting multiple balancing steel bars, the installation time of the balancing hoop can be further reduced, and the efficiency of stabilizing cable tensioning can be improved. At the same time, the balancing hoop and the limiting clamp are both connected by bolts to achieve rapid disassembly and installation of the hoop and the balancing steel bars.

[0029] 3. The balancing steel bar is divided into two sections, which are formed into a whole by a connecting sleeve. The pre-tightening force of the balancing steel bar can be adjusted by adjusting the tightness of the connecting sleeve to achieve the purpose of tightening the balancing clamp and the load-bearing cable. A rotating auxiliary plate is installed at the bottom of the connecting device to facilitate the adjustment of the steel bar angle, eliminate the gap between the steel bar limiting sleeve and the steel plate, and improve the structural reliability.

[0030] 4. The present invention proposes a construction method for a tension load regulating device and a calculation method for some key structures, which efficiently and safely guides the engineering application of the device and provides a calculation basis for component selection. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a typical elevation view of a photovoltaic flexible support system;

[0032] Figure 2 This is the elevation view of the balance hoop connection;

[0033] Figure 3 This is a schematic diagram of the connection between the balance hoop and the balance steel bar;

[0034] Figure 4 This is the structural diagram of the balance hoop;

[0035] Figure 5 This is a schematic diagram of balanced reinforcement;

[0036] Figure 6 It is a schematic diagram for connecting the device installation;

[0037] Figure 7 Schematic diagram of the connection device structure Figure 1 ;

[0038] Figure 8 Schematic diagram of the connection device structure Figure 2 .

[0039] In the figure: 1. neutral column; 2. stabilizing cable; 3. load-bearing cable; 4. inclined cable; 5. balancing clamp; 6. balancing steel bar; 7. connecting device; 51. fastening clamp; 52. connecting clamp; 521. connecting plate; 522. slot; 523. limiting clamp; 61. first section of steel bar; 62. second section of steel bar; 63. connecting sleeve; 64. limiting end plate; 71. steel bar limiting sleeve; 72. lower part of connecting device; 73. rotation auxiliary plate; 74. steel strand anchor; 75. anchor limiting plate; 76. upper part of connecting device. DETAILED DESCRIPTION

[0040] In order to enable those skilled in the art to better understand the technical solution of the present invention, the preferred implementation scheme of the present invention is described below in conjunction with specific embodiments. However, it should be understood that the drawings are only used for exemplary description and cannot be understood as a limitation on this patent. In order to better illustrate this embodiment, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted. The positional relationship described in the drawings is only for exemplary description and cannot be understood as a limitation on this patent.

[0041] The present invention is further described in detail below in conjunction with the accompanying drawings to illustrate a photovoltaic flexible support stabilizing cable rapid tensioning device and construction method.

[0042] Embodiment 1

[0043] This embodiment is a solution in which one balancing hoop 5 connects three balancing steel bars 6 .

[0044] Figure 1This is a typical elevation view of a photovoltaic flexible support. The central column 1 is usually a PHC prestressed pipe pile, which is mainly used to support the cable structure above a certain height above the ground; the load-bearing cable 3 is a continuous prestressed cable that runs through each span, which is mainly used to support the photovoltaic module; the stabilizing cable 2 is located below the load-bearing cable 3, disconnected between each span, and the stabilizing cable 2 and the load-bearing cable 3 are connected by a steel structure, which is mainly used to resist the deformation of the cable structure under the deadweight of the photovoltaic module and the wind and snow load; the inclined cable 4 is mainly used to resist the horizontal force generated by the stabilizing cable 2 and the load-bearing cable 3 on the end column. During the tensioning process of the stabilizing cable 2, the stabilizing cable 2 of the adjacent span is not tensioned, and the central column 1 is subjected to the unbalanced force generated by the different tensions of the stabilizing cables 2 of the two spans, which generates a bending moment at the bottom of the central column 1, which is easy to cause the column structure to be damaged. Therefore, in conventional construction, the stabilizing cable 2 cannot be tensioned to the design value at one time. All the stabilizing cables 2 in a row need to be installed, and the first level tensioning is carried out from the first span to the last span, and then the second level is carried out in sequence, and this cycle is repeated until the tension of all stabilizing cables 2 reaches the design value.

[0045] Figure 2 The vertical view of the connection of the balancing clamp 5. The balancing clamp 5 proposed by the present invention is installed on the top of the center column 2 by bolts, and the balancing steel bar 6 is connected to the load-bearing cable 3 on the right side of the center column 1. When the stabilizing cable 2 on the left side of the center column 1 is tensioned, an unbalanced load and displacement are generated on the center column 2. The balancing steel bar 6 transfers the unbalanced load to the load-bearing cable 3 and the inclined cable 4 at the end of the photovoltaic array by limiting the displacement of the center column 1.

[0046] Figure 3 This is a schematic diagram of the connection between the balance hoop 5 and the balance steel bar 6. Figure 4 The balancing hoop 5 includes a hoop body, a connecting plate 521 , a clamping groove 522 , and a limiting clamping plate 523 ; the hoop body is composed of a semicircular fastening hoop 51 and a semicircular connecting hoop 52 . The fastening hoop 51 is semicircular, with both ends bent outward to form a mounting ear, and the mounting ear openings are used for bolt connection. The connecting hoop 52 is also semicircular, with both ends bent outward to form a mounting ear, and the fastening hoop 51 and the connecting hoop 52 are fixed to the top of the center column by bolt preload; a connecting plate 521 is installed at the semicircle of the connecting hoop 52 by welding for connecting the balancing steel bar, and a groove-shaped opening on the connecting plate 521 forms a slot 522, and the slot 522 is used to limit the relative displacement of the balancing steel bar 6 and the center column 1 during the tensioning process; after the balancing steel bar 6 is installed into the slot 522, a limiting clip 523 is installed on the outer side 522 of the slot, and the limiting clip 523 and the connecting plate 522 are fastened by bolts, mainly used to close the upper opening of the slot 522 to prevent the balancing steel bar 6 from slipping out of the upper part of the slot 522 during the tensioning process. In other embodiments, the clamp body is composed of two semicircular connecting clamps 52, which are respectively connected to the balancing steel bars on both sides of the central column.

[0047] Figure 5 It is a schematic diagram of the balanced steel bar, the balanced steel bar 6 includes a first section of steel bar 61, a second section of steel bar 62, a connecting sleeve 63 and a limiting end plate 64. The steel bar material is prestressed steel bar, which is divided into two sections, the limiting end plate 64 is a steel plate, welded to the bottom of the lower first section of steel bar 61, the size of the limiting end plate 64 is larger than the size of the slot 522 of the connecting hoop, and is installed on the inner side of the slot 522; the upper second section of steel bar 61 is fastened to the load-bearing cable 3 through the connecting device 7, and the two sections of steel bars are connected by the connecting sleeve 63, which facilitates the installation of the steel bar 61. The preload force of the balanced steel bar 6 can be adjusted by rotating the connecting sleeve 63, so as to achieve the function of adjusting the unbalanced load of the stable cable tensioning.

[0048] Figure 6 This is a schematic diagram of the installation of the connecting device 7, which is mainly used to tighten the balancing steel bar 6 so that it does not have relative displacement with the load-bearing cable 3. Figure 7 and Figure 8 It is a schematic diagram of the structure of the connection device 7, which includes a steel bar limiting sleeve 71, a connection device bottom part 72, a rotation auxiliary plate 73, a steel strand anchor 74, an anchor limiting plate 75, and a connection device top part 76. The connection device bottom part 72 is provided with a circular hole, and the balancing steel bar 6 passes through the first hole. The rotation auxiliary plate 73 is installed around the first hole, which is two semicircular crescent plates. The steel bar limiting sleeve 71 contains a thread, so that the sleeve does not produce relative displacement with the steel bar 61. The steel bar limiting sleeve 71 is twisted from the top of the steel bar 61 to the rotation auxiliary plate 73. When the balancing steel bar 6 is at different angles, the steel bar limiting sleeve 71 always squeezes the arc-shaped side of the rotation auxiliary plate 73 to avoid the steel bar limiting sleeve 71 directly connecting with the flat steel plate to produce a gap and cause uneven force. The connection device top part 76 is detachable from the connection device bottom part 72, and the contact surface is provided with a circular hole for Install the steel strand anchor 74, cut it into two halves, and after installing it on the load-bearing cable 3, the upper part 76 and the lower part 72 of the connecting device embrace it and fasten it with bolts passing through the connecting device 7; to prevent the steel strand anchor 74 from slipping out of the circular hole during load transfer, an anchor limit plate 75 is installed on the side of the connecting device 7, and the anchor limit plate 75 is also divided into an upper and lower part, and a circular second hole is opened on the contact surface. The diameter of the second hole is slightly larger than the diameter of the load-bearing cable but smaller than the diameter of the steel strand anchor 74, and the upper and lower parts of the anchor limit plate 75 are fastened to the connecting device by bolts to form a whole, thereby limiting the falling off of the steel strand anchor 75.

[0049] After the three balancing steel bars 6 are installed and pre-tightened, the stabilizing cables 2 can be tensioned.

[0050] The main steps of the construction method of the photovoltaic flexible support tension load adjustment device are as follows:

[0051] Step 1: The load-bearing cables 3 and the inclined cables 4 are tensioned in stages to the designed pretension and tightened; when the Nth span needs to tension the stabilizing cables 2, a tensioning load adjustment device is installed in the N+1 span;

[0052] Step 2: Install the balancing hoop 5 on the top of the center column 1. The hoop is connected with bolts. The allowable tension of the bolts should satisfy the following formula:

[0053]

[0054] in:

[0055] F 1 is the allowable tensile force of the bolt, N 1 The number of clamp fastening bolts, n is the safety factor and should not be less than 2, F w is: design pretension of stabilizing cable, N 2 The number of balancing bars connected to a single balancing hoop

[0056] Step 3: Install the limiting end plate 64 on the balance steel bar 6 to the clamping groove 522, and install the limiting clamping plate 523, and install the connecting sleeve 63 on the first section of steel bar 61, and do not tighten it temporarily;

[0057] Step 4: Install the strand anchor 74 at the designated position of the load-bearing cable 3. The principle of position selection is that the angle between the balance steel bar 6 and the load-bearing cable 3 is not greater than 10 degrees. After the anchor is installed, tighten the upper part 76 and the lower part 72 of the connecting device with bolts and hold the anchor tightly, and then install the anchor limit plate 75;

[0058] Step 5: The top of the second section of the steel bar 62 of the balancing steel bar 6 passes through the first hole of the lower part 72 of the connecting device, and the steel bar limiting sleeve 71 is installed. The lower end of the second section of the steel bar 62 of the balancing steel bar 6 is installed on the connecting sleeve 63, and the sleeve 62 is tightened so that the balancing steel bar 6 tightens the middle column 1 and the load-bearing cable 3. The allowable tension of the bolt should satisfy the following formula:

[0059]

[0060] in:

[0061] F 2 To balance the allowable tensile force of the steel bar

[0062] Step 6: Install the stabilizing cable 2 in the adjacent span where the tensioning load adjustment device is installed, and tension it. During the tensioning process, closely observe the deformation of the middle column 1 and the beam until the pretension reaches the design value;

[0063] Step 7: Repeat steps 2-6 at span N+2. After tensioning is completed, remove the tensioning load adjustment device at span N+1 and repeat the installation at the next span.

[0064] Embodiment 2

[0065] This embodiment is a solution in which one balancing hoop is connected to one balancing steel bar.

[0066] The balancing hoop 6 changes the structural form of the connecting plate 521, retaining only the middle slot 522 and the limiting clamp plate 523. After the stabilizing cable 2 is tensioned according to the construction process, the connecting device 7 is removed and the balancing hoop 6 is rotated a certain angle so that the balancing steel bar 6 can be fastened to the adjacent load-bearing cables 3 through the connecting device 6, thereby achieving the purpose of applying one balancing steel bar 6 to multiple load-bearing cables 3 around the central column 1.

[0067] The present invention proposes a photovoltaic flexible bracket tensioning load adjustment device and construction method. Compared with the prior art, the unbalanced force generated during the stabilizing cable tensioning process is transmitted to the load-bearing cable 3 and balanced by the inclined cable 4, so that the construction process of the stabilizing cable 2, which originally required 3-5 times of staged tensioning, can be simplified to one time tensioning to the design value, simplifying the construction process. According to the conventional scheme, the stabilizing cable 2 is staged and tensioned 3 times. The present invention can save 2 / 3 of the tensioning time. For large-scale projects, the tensioning time of 100 days can be shortened to 33 days; the proposed balance hoop 5 can be connected to a single or multiple balance steel bars 6, and connect multiple When balancing the steel bar 6, the installation time of the balancing hoop 5 can be further reduced, and the tensioning efficiency of the stabilizing cable 2 can be improved. At the same time, the balancing hoop 5 and the limiting clamp plate 523 are both connected by bolts to realize the rapid disassembly and installation of the hoop 5 and the balancing steel bar 6; a rotating auxiliary plate 73 is installed at the lower part 72 of the connecting device to facilitate the adjustment of the angle of the steel bar 61, eliminate the gap between the steel bar limiting sleeve 71 and the steel plate, and improve the structural reliability; the present invention proposes a construction method for a tensioning load adjustment device and a calculation method for some key structures, which efficiently and safely guides the engineering application of the device and provides a calculation basis for component selection.

[0068] According to the description and drawings of the present invention, those skilled in the art can easily manufacture or use a photovoltaic flexible support stabilizing cable rapid tensioning device and construction method of the present invention, and can produce the positive effects described in the present invention.

[0069] Unless otherwise specified, in the present invention, the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicating orientation or positional relationships are based on the orientation or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the orientation or positional relationship in the present invention are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood in conjunction with the drawings and according to specific circumstances.

[0070] Unless otherwise clearly specified and limited, in the present invention, the terms "disposed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0071] The above is only a preferred embodiment of the present invention, but the present invention is not limited to the above specific embodiments. Those skilled in the art may make some modifications, supplements or use similar methods instead without departing from the principle of the present invention, which should also be regarded as the protection scope of the present invention.

Claims

1. A photovoltaic flexible support stabilizing cable rapid tensioning device, the rapid tensioning device is applicable to a photovoltaic flexible support system consisting of at least a central column (1), a stabilizing cable (2), a load-bearing cable (3) and a stay cable (4), characterized in that: The rapid tensioning device comprises a balancing hoop (5), a balancing steel bar (6) and a connecting device (7); the lower end of the balancing steel bar (6) is fixed to the central column (1) through the balancing hoop (5), and the upper end of the balancing steel bar (6) is fixed to the load-bearing cable (3) of the adjacent span of the tensioning stabilizing cable (2) through the connecting device (7); The balancing hoop (5) comprises a hoop body installed on the top of the neutral column (1); a connecting plate (521) is installed on the outer wall of the hoop body; a slot (522) is provided on the connecting plate (521) for the balancing steel bar (6) to be inserted; a limiting clamping plate (523) is installed on the slot (522); a limiting end plate (64) is provided at the lower end of the balancing steel bar (6); the limiting end plate (64) is located on the inner side of the slot (522) and forms a limiting matching relationship with the slot (522) and the limiting clamping plate (523).

2. The photovoltaic flexible support stabilizing cable rapid tensioning device according to claim 1 is characterized in that: Slots (522) for embedding the balancing steel bars (6) are provided in different directions of the connecting plate (521).

3. The photovoltaic flexible support stabilizing cable rapid tensioning device according to claim 1 is characterized in that: The hoop body is composed of a semi-circular fastening hoop (51) and a semi-circular connecting hoop (52), or is composed of two semi-circular connecting hoop (52), and the connecting plate (521) is installed on the outer wall of the connecting hoop (52).

4. The photovoltaic flexible support stabilizing cable rapid tensioning device according to claim 1 is characterized in that: The length of the balancing steel bar (6) is adjustable.

5. The photovoltaic flexible support stabilizing cable rapid tensioning device according to claim 4 is characterized in that: The balancing steel bar (6) comprises a first section of steel bar (61), a second section of steel bar (62) and a connecting sleeve (63); the upper end of the first section of steel bar (61) extends into the interior of the connecting sleeve (63) and is threadedly connected thereto; the lower end of the first section of steel bar (61) is fixed to the balancing clamp (5) via a limiting end plate (64); the upper end of the second section of steel bar (62) is fixed to the load-bearing cable (3) via the connecting device (7); the lower end of the second section of steel bar (62) extends into the interior of the connecting sleeve (63) and is threadedly connected thereto; the threaded direction of the connecting sleeve (63) is opposite to that of the first section of steel bar (61) and the second section of steel bar (62).

6. The photovoltaic flexible support stabilizing cable rapid tensioning device according to claim 5 is characterized in that: The first section of steel bars (61) and the second section of steel bars (62) are both prestressed cables.

7. The photovoltaic flexible support stabilizing cable rapid tensioning device according to claim 1 is characterized in that: The connecting device (7) comprises a detachable lower connecting device portion (72) and an upper connecting device portion (76), the contact surfaces of the lower connecting device portion (72) and the upper connecting device portion (76) being provided with a steel strand anchor (74) fixed to the load-bearing cable (3), the lower connecting device portion (72) being provided with a first hole for the balance steel bar (6) to pass through, a rotation auxiliary plate (73) being provided around the first hole, and a steel bar limiting sleeve (71) being threadedly connected to the upper end of the balance steel bar (6) being in contact with the outer side of the rotation auxiliary plate (73).

8. The photovoltaic flexible support stabilizing cable rapid tensioning device according to claim 7 is characterized in that: The connecting device (7) also includes an anchor limit plate (75) for limiting the falling off of the steel strand anchor (74), and the anchor limit plate (75) includes a lower portion of the anchor limit plate (75) fixed to the lower portion (72) of the connecting device and an upper portion of the anchor limit plate (75) fixed to the upper portion (76) of the connecting device. The contact surface between the upper portion of the anchor limit plate (75) and the lower portion of the anchor limit plate (75) is provided with a second hole, and the diameter of the second hole is larger than the diameter of the load-bearing cable (3) but smaller than the diameter of the steel strand anchor (74).

9. A construction method for the photovoltaic flexible support stabilizing cable rapid tensioning device according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1, the load-bearing cable (3) and the inclined cable (4) are tensioned in stages to the designed pre-tension and tightened; when the stabilizing cable (2) needs to be tensioned in the Nth span, a quick tensioning device is installed in the N+1 span; S2. Install a balancing clamp (5) on the top of the center column (1). The clamp is connected by bolts. The allowable tension of the bolts should satisfy the following formula: Where: F1 is the allowable tension of the bolt, N1 is the number of clamp fastening bolts, n is the safety factor and is not less than 2, F w The pre-tensioning force of the stabilizing cable is designed, and N2 is the number of balancing steel bars connected to a single balancing hoop; S3, installing the limiting end plate (64) on the balance steel bar (6) into the clamping groove (522), installing the limiting clamping plate (523), and installing the connecting sleeve (63) on the first section of steel bar (61), without tightening it temporarily; S4. Install the steel strand anchor (74) at the designated position of the load-bearing cable (3). The principle of selecting the position is that the angle between the balance steel bar (6) and the load-bearing cable (3) is not greater than 10 degrees. After the anchor is installed, the upper and lower parts of the connecting device are fastened with bolts to hold the anchor tightly, and then the anchor limit plate (75) is installed. S5. Pass the top end of the second section of steel bar (62) through the first hole at the bottom of the connecting device (7), install the steel bar limiting sleeve (71), install the lower end of the second section of steel bar (62) on the connecting sleeve (63), tighten the sleeve, so that the balance steel bar (6) tensions the middle column (1) and the load-bearing cable (3), and the allowable tension of the balance steel bar (6) should satisfy the following formula: Among them: F2 is the allowable tension of the balanced steel bar; S6. Install the stabilizing cable (2) in the adjacent span where the rapid tensioning device is installed, and tension the cable. During the tensioning process, closely observe the deformation of the columns and beams until the pretensioning force reaches the designed value. S7. Repeat steps 2-6 at span N+2. After the tensioning is completed, remove the quick tensioning device at span N+1 and repeat the installation at the next span.

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