Dual anchoring structure of photovoltaic cable and construction method thereof

Abstract

The application discloses a double anchoring structure of a photovoltaic cable and a construction method thereof, and belongs to the technical field of photovoltaic cables. The double anchoring structure of the photovoltaic cable solves the technical problem of low safety of an existing anchoring structure of a photovoltaic cable. The anchoring structure comprises an anchor device for anchoring the cable to a support structure, and further comprises an extrusion anchoring sleeve fixedly connected to one end of the cable. A bidirectional clamping mechanism is arranged between the extrusion anchoring sleeve and the anchor device to clamp the two. The extrusion anchoring sleeve, the anchor device and the bidirectional clamping mechanism jointly form a double anchoring structure. The bidirectional clamping mechanism comprises an adjusting cylinder and an adjusting sleeve which are connected to each other through threads. The adjusting cylinder clamps the extrusion anchoring sleeve, and the adjusting sleeve clamps the anchor device. Alternatively, the adjusting cylinder clamps the anchor device, and the adjusting sleeve clamps the extrusion anchoring sleeve. After the extrusion anchoring sleeve and the anchor device are clamped by the bidirectional clamping mechanism, a double anchoring structure is formed, the safety coefficient of the cable is increased by more than one time, and the safety of the anchoring structure of the photovoltaic cable is improved.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic cable technology, and more specifically, to a double anchoring structure for photovoltaic cables and its construction method. Background Technology

[0002] Traditional photovoltaic (PV) support structures are relatively simple in design and easy to analyze for stress. Although this type of support is still used, it has many disadvantages, such as high steel consumption, large footprint, and high cost. Furthermore, this type of support cannot adapt to complex terrain. Therefore, flexible solar PV support structures are increasingly replacing traditional structures. Flexible solar PV support structures consist of photovoltaic panels installed on rows of steel cables, with rigid supports connecting both ends of the cables.

[0003] Patent CN214329589U provides a prestressed steel strand end anchoring structure based on flexible installation of photovoltaic modules. It includes a support beam, steel strands, and anchors. Both ends of the steel strands are anchored to the support beam by the anchors. The anchors include anchor rings, clamps, disc springs, and anti-loosening nuts. The anchor rings have conical holes. The clamps hold the steel strands in the conical holes of the anchor rings. The anti-loosening nuts are threaded to the anchor rings. The steel strands pass through the anti-loosening nuts. The disc springs are located inside the anti-loosening nuts, with one end abutting against the anti-loosening nuts and the other end abutting against the end of the clamps.

[0004] The aforementioned anchoring structure uses a disc spring to provide an elastic clamping force to the clamping plates and locks them in place with anti-loosening nuts, thus ensuring the stability and reliability of the steel strand anchoring structure. However, during long-term use, the anchoring structure is exposed to sun and rain, and corrosive agents in the environment (such as acidic substances) can easily penetrate the anchoring structure, corroding the steel strands, anchor rings, clamping plates, etc. Once the corrosion reaches a certain extent, the steel strands are prone to slippage, causing the photovoltaic power generation system to collapse and resulting in significant property damage. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to address the above-mentioned shortcomings of the prior art. The purpose of the present invention is to provide a double anchoring structure for photovoltaic cables with high safety performance.

[0006] The second objective of this invention is to provide a double-anchoring construction method for photovoltaic cables with high safety performance.

[0007] To achieve the above objective, the present invention provides a dual anchoring structure for photovoltaic cables, including an anchor for anchoring the cable to a supporting structure, and a compression anchor sleeve fixedly connected to one end of the cable. A bidirectional tightening mechanism is provided between the compression anchor sleeve and the anchor for pressing the two together. The compression anchor sleeve, the anchor, and the bidirectional tightening mechanism together form a dual anchoring structure.

[0008] As a further improvement, the bidirectional tightening mechanism includes an adjusting cylinder and an adjusting sleeve connected to each other by threads; the adjusting cylinder tightens the compression anchor sleeve, and the adjusting sleeve tightens the anchor; or, the adjusting cylinder tightens the anchor, and the adjusting sleeve tightens the compression anchor sleeve.

[0009] Furthermore, both the adjusting cylinder and the adjusting screw sleeve have axially arranged through grooves on their side walls.

[0010] Furthermore, the compression anchor sleeve is pressed tightly against the periphery of the cable by compression.

[0011] Furthermore, the anchor includes an anchor plate with a conical hole inside. A clamping piece is provided inside the conical hole. The wedge-shaped structure between the clamping piece and the conical hole allows the clamping piece to firmly grip the cable. A sealing cap is provided at one end of the anchor plate. Sealing material is provided between the sealing cap and the anchor plate, between the sealing cap and the cable, between the clamping piece and the cable, and between the clamping piece and the anchor plate.

[0012] Furthermore, an elastic element is provided between the sealing cover and the clamp, and the two ends of the elastic element respectively press against the sealing cover and the clamp.

[0013] Furthermore, the sealing cap and the anchor plate are connected by threads, and the elastic element is a butterfly spring.

[0014] To achieve the second objective mentioned above, this invention provides a construction method for double anchoring of photovoltaic cables, comprising the following steps:

[0015] Step S1. After pulling the cable through the anchor hole of the support structure, the anchor plate, wedge, elastic element, sealing cap, extrusion anchor sleeve and tensioning extrusion machine are sequentially put into the cable;

[0016] Step S2. Start the tensioning and extrusion machine to tension the cable, and stop tensioning after the design force value is reached;

[0017] Step S3. Apply sealant between the sealing cap and the anchor plate, between the sealing cap and the cable, between the clamp and the cable, and between the clamp and the anchor plate.

[0018] Step S4. Tighten the sealing cap around the anchor plate, so that the sealing cap is pressed against the clip in the cone hole of the anchor plate by the elastic element, and the wedge structure between the clip and the cone hole makes the clip firmly bite the cable.

[0019] Step S5. Start the tensioning and extrusion machine to extrude the extrusion anchor sleeve, pressing the extrusion anchor sleeve tightly against the outer periphery of the cable;

[0020] Step S6. Remove the tensioning and extrusion machine, insert the adjusting cylinder and adjusting screw into the cable between the extrusion anchor sleeve and the sealing cover through the through groove, and unscrew the adjusting screw until the adjusting cylinder is pressed against the extrusion anchor sleeve and the adjusting screw is pressed against the sealing cover; or, until the adjusting screw is pressed against the extrusion anchor sleeve and the adjusting cylinder is pressed against the sealing cover.

[0021] Beneficial effects

[0022] Compared with the prior art, the present invention has the following advantages:

[0023] 1. The present invention forms a clamp anchoring unit by wedge-fitting and fastening the clamping plate with the anchor plate, which can firmly hold the cable and achieve an anchoring coefficient of over 95%.

[0024] 2. This invention solves the problem of large vibrations in the clamping plates of cables and photovoltaic modules caused by wind vibration and other factors by adding a butterfly spring.

[0025] 3. This invention, by adding a sealing cap, prevents the clamping piece from retracting and causing clamping failure.

[0026] 4. By adding sealing materials, this invention can block external corrosive agents and play a sealing role, effectively preventing corrosion of the anchoring section's wedges, anchor plates, and clamping cables.

[0027] 5. The present invention has a through groove on the outer circle of the adjusting cylinder and the adjusting screw sleeve, making the adjusting cylinder and the adjusting screw sleeve an open structure, which makes it easy to insert the cable for installation after extrusion.

[0028] 6. This invention forms a double anchoring structure by squeezing the anchor sleeve, the anchor, and the bidirectional tightening mechanism, which can increase the anchoring safety factor of the cable by more than 1 times, thereby improving the safety of the photovoltaic cable anchoring structure.

[0029] 7. The tensioning and extrusion integrated machine of the present invention is a through-hole type, which can tension the cable when hanging the cable. It is small in size, light in weight, and convenient for construction and transportation.

[0030] 8. The tensioning and extrusion integrated machine of the present invention can immediately extrude the anti-slip extrusion anchor sleeve after tensioning is completed, and has tensioning and extrusion functions.

[0031] 9. This invention, through its construction method, simultaneously possesses the functions of tensioning and anchoring as well as compression and anti-detachment. Construction is convenient and fast, effectively improving the safety factor of the photovoltaic cable system and ensuring the stable operation of photovoltaic power generation components. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the anchoring structure of the present invention;

[0033] Figure 2 for Figure 1A magnified view of a portion of the image;

[0034] Figure 3 for Figure 2 A magnified view of a portion of the image;

[0035] Figure 4 This is a schematic diagram of the protective component in this invention;

[0036] Figure 5 This is a schematic diagram of the tensioning and extrusion integrated machine in this invention;

[0037] Figure 6 This is a schematic diagram of the installation structure of the compression jack in this invention.

[0038] The components are: 1-cable, 2-support structure, 3-anchor, 4-extrusion anchor sleeve, 5-bidirectional tightening mechanism, 6-adjusting screw sleeve, 7-adjusting cylinder, 8-anchor plate, 9-clamping plate, 10-sealing cover, 11-sealing material, 12-elastic element, 13-anchor hole, 14-tensioning and extrusion integrated machine, 15-protective component, 16-support frame, 17-tensioning jack, 18-extrusion jack, 19-radial extrusion die, 20-extrusion groove, 21-side plate, 22-mounting plate, 23-connecting rod, 24-nut. Detailed Implementation

[0039] The present invention will be further described below with reference to specific embodiments shown in the accompanying drawings.

[0040] See Figures 1-6 A dual anchoring structure for photovoltaic cables includes an anchor 3 for anchoring the cable 1 to a support structure 2, and a compression anchor sleeve 4 fixedly connected to one end of the cable 1. A bidirectional tightening mechanism 5 is provided between the compression anchor sleeve 4 and the anchor 3 to tighten the two together. The compression anchor sleeve 4, the anchor 3, and the bidirectional tightening mechanism 5 together form a dual anchoring structure, which can increase the anchoring safety factor of the cable 1 by more than 1 times, thereby improving the safety of the photovoltaic cable anchoring structure.

[0041] The bidirectional tightening mechanism 5 includes an adjusting cylinder 7 and an adjusting screw sleeve 6 connected to each other by threads; the adjusting cylinder 7 tightens the compression anchor sleeve 4, and the adjusting screw sleeve 6 tightens the anchor 3; or, the adjusting cylinder 7 tightens the anchor 3, and the adjusting screw sleeve 6 tightens the compression anchor sleeve 4.

[0042] Preferably, the side walls of the adjusting cylinder 7 and the adjusting screw sleeve 6 are provided with axially arranged through grooves, that is, the adjusting cylinder 7 and the adjusting screw sleeve 6 are open structures, and the adjusting cylinder 7 and the adjusting screw sleeve 6 can be easily fitted into the cable 1 through the through grooves.

[0043] The compression anchor sleeve 4 is pressed tightly against the outer periphery of the cable 1 by compression. The compression anchor sleeve 4 can also prevent the photovoltaic power generation system from collapsing due to cable slippage.

[0044] The anchor 3 includes an anchor plate 8 with a conical hole inside. A clamping piece 9 is located within the conical hole. The wedge-shaped structure between the clamping piece 9 and the conical hole allows the clamping piece 9 to firmly grip the cable 1. The inner hole of the clamping piece 9 has tooth-shaped or anti-slip textures to improve the stability of the gripping action. One end of the anchor plate 8 has a sealing cap 10. Sealing material 11 is provided between the sealing cap 10 and the anchor plate 8, between the sealing cap 10 and the cable 1, between the clamping piece 9 and the cable 1, and between the clamping piece 9 and the anchor plate 8. Specifically, sealing material 11 is applied between the sealing cap 10 and the anchor plate 8, between the sealing cap 10 and the cable 1, between the clamping piece 9 and the cable 1, and between the clamping piece 9 and the anchor plate 8. The sealing material 11 at the interface between the sealing cap 10 and the cable 1, and at the interface between the sealing cap 10 and the anchor plate 8, is trimmed so that the cross-section of the sealing material 11 has a triangular structure. Sealing materials can block external corrosive agents and play a sealing role, effectively preventing corrosion of the anchoring section's wedges, anchor plates, and clamping cables.

[0045] Similarly, sealant 11 is applied between the anchor plate 8 and the support structure 2 and then trimmed to achieve better protection.

[0046] An elastic element 12 is provided between the sealing cover 10 and the clamping piece 9, with both ends of the elastic element 12 pressing against the sealing cover 10 and the clamping piece 9 respectively. Preferably, the elastic element 12 is a butterfly spring.

[0047] The sealing cover 10 and the anchor plate 8 are connected by threads, that is, the anchor plate 8 is provided with external threads, and the sealing cover 10 is provided with internal threads that are compatible with the external threads of the anchor plate 8.

[0048] In one embodiment, such as Figure 4 As shown, the double anchoring structure also includes a protective component 15 that covers the protruding end of the cable 1, the compression anchor sleeve 4, the bidirectional tightening mechanism 5, and the anchor 3. Preferably, the protective component 15 is a heat shrink tubing. The heat shrink tubing is inserted into the cable 3 until one end of the heat shrink tubing contacts the support structure 2. A hot air blower is used to heat the heat shrink tubing, causing it to fully shrink until it completely covers the cable 1, the compression anchor sleeve 4, the bidirectional tightening mechanism 5, and the anchor 3.

[0049] A construction method for double anchoring of photovoltaic cables includes the following steps:

[0050] Step S1. After pulling the cable 1 through the anchor hole 13 of the support structure 2, it can be pulled by a winch or other traction mechanism, and the anchor plate 8, clamp 9, elastic element 12, sealing cover 10, extrusion anchor sleeve 4 and tensioning and extrusion integrated machine 14 are put into the cable 1 in sequence.

[0051] Step S2. Start the tensioning and extrusion machine 14 to tension the cable 1, and stop tensioning after it reaches the design force value;

[0052] Step S3. Apply sealant 11 between the sealing cap 10 and the anchor plate 8, between the sealing cap 10 and the cable 1, between the clamp 9 and the cable 1, and between the clamp 9 and the anchor plate 8.

[0053] Step S4. Tighten the sealing cap 10 around the anchor plate 8. A torque wrench can be used to apply a force of 15t to 20t to tighten the sealing cap 10, so that the sealing cap 10 presses against the clamping piece 9 in the conical hole of the anchor plate 8 through the elastic element 12. The wedge structure between the clamping piece 9 and the conical hole makes the clamping piece 9 firmly bite the cable 1. Then, trim the sealing material 11 at the interface between the sealing cap 10 and the cable 1 and the interface between the sealing cap 10 and the anchor plate 8 so that the cross-section of the sealing material 11 is triangular. Similarly, apply the sealing material 11 between the anchor plate 8 and the support structure 2 and trim it to achieve a better protective effect.

[0054] Step S5. Start the tensioning and extrusion machine 14 to extrude the extrusion anchor sleeve 4, and press the extrusion anchor sleeve 4 tightly on the periphery of the cable 1;

[0055] Step S6. Remove the tensioning and extrusion integrated machine 14, and insert the adjusting cylinder 7 and adjusting screw sleeve 6 into the cable 1 between the extrusion anchor sleeve 4 and the sealing cover 10 through the through groove. Unscrew the adjusting screw sleeve 6 until the adjusting cylinder 7 is pressed against the extrusion anchor sleeve 4 and the adjusting screw sleeve 6 is pressed against the sealing cover 10; or, until the adjusting screw sleeve 6 is pressed against the extrusion anchor sleeve 4 and the adjusting cylinder 7 is pressed against the sealing cover 10.

[0056] In this embodiment, the tensioning and extrusion integrated machine 14 used is as follows: Figure 5 , Figure 6 As shown, it includes a support frame 16, which is used to connect the support structure 2. The support frame 16 is equipped with a tension jack 17, which is aligned with the anchor hole 13 opened in the support structure 2. The support frame 16 is equipped with a radial compression mechanism that compresses from the outside to the middle. The radial compression mechanism is located in the support frame 16 between the tension jack 17 and the support structure 2. The radial compression mechanism and the tension jack 17 have the same axis.

[0057] In this embodiment, the radial extrusion mechanism includes at least two extrusion jacks 18, which are evenly arranged around the axis of the tensioning jack 17. Each extrusion jack 18 has a radial extrusion die 19 at its output end. Specifically, the radial extrusion die 19 is bolted to the extrusion piston of the extrusion jack 18.

[0058] The radial extrusion die 19 is provided with an extrusion groove 20. Preferably, the extrusion groove 20 has a circular arc structure, and after extrusion, the extrusion groove 20 forms a circle whose axis is coaxial with the axis of the tensioning jack 17.

[0059] The support frame 16 includes at least two connecting support structures 2 and side plates 21 evenly arranged around the tension jack 17. One end of each side plate 21 is connected to a mounting plate 22 for mounting the tension jack 17. The tension jack 17 is mounted on the mounting plate 22 by bolts.

[0060] In one embodiment, the number of compression jacks 18 is equal to the number of side plates 21, and they are installed on the side plates 21 in a one-to-one correspondence. The compression jacks 18 are installed on the side plates 21 by bolts.

[0061] In one embodiment, there are two compression jacks 18, which are located on the side plates 21 on both sides of the tensioning jack 17.

[0062] A reinforcing structure is provided between the side plates 21 on both sides.

[0063] In one embodiment, the reinforcing structure includes a connecting rod 23 connecting the two side plates 21. The connecting rod 23 has threaded sections at both ends, which pass through the side plates 21 and are then locked by nuts 24. During the pressing process, the pressing jacks 18 on both sides are subjected to a large reverse force. By tightening the side plates 21 through the connecting rod 23, the working strength of the side plates 21 can be improved, preventing the side plates 21 from deforming due to excessive reverse force from the pressing jacks 18.

[0064] Of course, the connecting rod 23 can also be connected to the side plate 21 by welding, or by a snap ring, or by a pin.

[0065] In one embodiment, the reinforcing structure is a connecting plate welded to the side plates 21 on both sides.

[0066] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of the present invention, and these will not affect the effectiveness of the implementation of the present invention or the practicality of the patent.

Claims

1. A double-anchoring structure for a photovoltaic cable, comprising an anchor (3) for anchoring the cable (1) to a supporting structure (2), characterized in that, It also includes a compression anchor sleeve (4) fixedly connected to one end of the cable (1), and a bidirectional clamping mechanism (5) is provided between the compression anchor sleeve (4) and the anchor (3) to clamp the two together. The compression anchor sleeve (4), the anchor (3) and the bidirectional clamping mechanism (5) together form a double anchoring structure. The bidirectional clamping mechanism (5) includes an adjusting cylinder (7) and an adjusting screw sleeve (6) connected to each other by threads; the adjusting cylinder (7) clamps the compression anchor sleeve (4), and the adjusting screw sleeve (6) clamps the anchor (3); or, the adjusting cylinder (7) clamps the anchor (3), and the adjusting screw sleeve (6) clamps the compression anchor sleeve (4). The anchor (3) includes an anchor plate (8), the anchor plate (8) has a conical hole, the conical hole has a clamping piece (9), the wedge structure between the clamping piece (9) and the conical hole makes the clamping piece (9) firmly bite the cable (1), and one end of the anchor plate (8) has a sealing cap (10). The sealing cap (10) and the anchor plate (8) are connected by threads; An elastic element (12) is provided between the sealing cap (10) and the clamp (9), and the two ends of the elastic element (12) respectively press against the sealing cap (10) and the clamp (9). The adjusting cylinder (7) or adjusting screw sleeve (6) is pressed against the sealing cover (10).

2. The double anchoring structure for a photovoltaic cable according to claim 1, characterized in that, The side walls of both the adjusting cylinder (7) and the adjusting screw sleeve (6) are provided with axially arranged through grooves.

3. The double anchoring structure for a photovoltaic cable according to claim 1, characterized in that, The compression anchor sleeve (4) is pressed tightly against the periphery of the cable (1) by compression.

4. The double anchoring structure for a photovoltaic cable according to claim 1, characterized in that, Sealing material (11) is provided between the sealing cover (10) and the anchor plate (8), between the sealing cover (10) and the cable (1), between the clip (9) and the cable (1), and between the clip (9) and the anchor plate (8).

5. The double anchoring structure for a photovoltaic cable according to claim 1, characterized in that, The elastic element (12) is a butterfly spring.

6. A construction method for a double-anchoring structure of photovoltaic cables as described in claim 4, characterized in that, Includes the following steps: Step S1. After pulling the cable (1) through the anchor hole (13) of the support structure (2), the anchor plate (8), the clamp (9), the elastic element (12), the sealing cap (10), the extrusion anchor sleeve (4) and the tensioning and extrusion machine (14) are sequentially put into the cable (1). Step S2. Start the tensioning and extrusion machine (14) to tension the cable (1), and stop tensioning after the design force value is reached; Step S3. Apply sealant (11) between the sealing cap (10) and the anchor plate (8), between the sealing cap (10) and the cable (1), between the clip (9) and the cable (1), and between the clip (9) and the anchor plate (8). Step S4. Tighten the sealing cap (10) around the anchor plate (8) so that the sealing cap (10) presses against the clamping piece (9) in the conical hole of the anchor plate (8) through the elastic element (12). The wedge structure between the clamping piece (9) and the conical hole makes the clamping piece (9) firmly bite the cable (1). Step S5. Start the tensioning and extrusion machine (14) to extrude the extrusion anchor sleeve (4) and press the extrusion anchor sleeve (4) tightly on the periphery of the cable (1); Step S6. Remove the tensioning and extrusion machine (14), insert the adjusting cylinder (7) and adjusting screw sleeve (6) into the cable (1) between the extrusion anchor sleeve (4) and the sealing cover (10) through the through groove, and unscrew the adjusting screw sleeve (6) until the adjusting cylinder (7) is pressed against the extrusion anchor sleeve (4) and the adjusting screw sleeve (6) is pressed against the sealing cover (10); or until the adjusting screw sleeve (6) is pressed against the extrusion anchor sleeve (4) and the adjusting cylinder (7) is pressed against the sealing cover (10).

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