A method of anchoring a photovoltaic cable

Abstract

This invention discloses an anchoring method for photovoltaic cables, belonging to the field of photovoltaic cable technology. It solves the technical problem of poor corrosion resistance in existing photovoltaic cables during anchoring. The method involves adding sealing material 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. A fixed anti-slip compression anchoring sleeve is installed at one end of the cable, and protective components are installed around the anti-slip compression anchoring sleeve and the cable. By adding sealing material 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, this invention can block external corrosive agents, achieving a sealing effect and effectively preventing corrosion of the clamp, anchor plate, and clamped portion of the cable in the anchoring section. The anti-slip compression anchoring sleeve prevents the photovoltaic power generation system from collapsing due to cable slippage. The protective components effectively prevent corrosion of the anti-slip compression anchoring sleeve and the protruding cable.

Description

Technical Field

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

[0002] Currently, photovoltaic cables (steel strands) lack protective measures during the anchoring process, are prone to corrosion after prolonged use, and if the cables slip, the photovoltaic power generation system will collapse, causing significant property damage. Summary of the Invention

[0003] 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 an anchoring method for photovoltaic cables.

[0004] The technical solution of the present invention is: an anchoring method for photovoltaic cables, wherein sealing materials are added between the sealing cover and the anchor plate, between the sealing cover and the cable, between the clamp and the cable, and between the clamp and the anchor plate; an anti-slip compression anchoring sleeve is fixedly connected at one end of the cable, and a protective component is provided around the anti-slip compression anchoring sleeve and the cable.

[0005] As a further improvement, the following steps are included:

[0006] Step S1. After passing the cable through the support structure, install the anchor plate, clamp, sealing cap, and anti-slip compression anchor sleeve onto the cable in sequence;

[0007] Step S2. Tension the cable to the design force value and then stop tensioning;

[0008] Step S3. Apply sealant between the anchor plate and the support structure, 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.

[0009] Step S4. Secure the sealing cap to the periphery of the anchor plate and make the sealing cap press against the clamping plate inside the conical hole of the anchor plate. The wedge-shaped structure between the clamping plate and the conical hole makes the clamping plate firmly grip the cable.

[0010] Step S5. Press the anti-slip compression anchor sleeve onto the cable by compression.

[0011] Furthermore, step S1 also includes inserting an elastic element into the cable between the clamp and the sealing cap; after the sealing cap is fastened to the periphery of the anchor plate in step S4, the sealing cap is pressed against the clamp in the conical hole of the anchor plate by the elastic element.

[0012] Furthermore, the elastic element is a disc spring.

[0013] Furthermore, in step S2, a tensioning and extrusion integrated device is first installed on the outside of the support structure, and one end of the cable is connected to the output end of the tensioning integrated device; then the tensioning and extrusion integrated device is started to tension the cable to the design force value and then tensioning is stopped.

[0014] Furthermore, step S2 includes the following steps:

[0015] Step S41. Install the support frame on the outside of the support structure;

[0016] Step S42. Install the tensioning jack on the mounting plate of the support frame, aligning the tensioning jack with the anchor holes opened in the support structure;

[0017] Step S43. Install extrusion jacks on the side plates on both sides of the tensioning jack, and install a radial extrusion die at the output end of the extrusion jack;

[0018] Step S44. Pass one end of the cable through the tension jack;

[0019] Step S45. Start the tensioning jack to tension the cable to the design force value and then stop tensioning.

[0020] Furthermore, the sealing cap and the anchor plate are connected by threads. In step S4, a torque wrench is used to apply a set force to tighten the sealing cap and press it against the clamp.

[0021] Furthermore, the force is set to 15t to 20t.

[0022] Further, in step S5, the anti-slip compression anchor sleeve is placed between two radial compression dies, and two compression jacks are activated to press the anti-slip compression anchor sleeve onto the cable.

[0023] Furthermore, the protective component is a heat shrink tubing. The heat shrink tubing is inserted into the cable until one end of the heat shrink tubing contacts the sealing cap. A hot air blower is used to heat the heat shrink tubing, causing it to shrink fully until it completely covers the cable and the anti-slip compression anchor sleeve.

[0024] Beneficial effects

[0025] Compared with the prior art, the advantages of this invention are as follows:

[0026] 1. The present invention forms an anchoring unit by wedge-locking the clamping plate with the anchor plate and clamping the steel strand, which can firmly hold the steel strand with an anchoring coefficient of over 95%.

[0027] 2. This invention solves the problem of large vibration of steel strands and photovoltaic modules caused by wind vibration and other factors by adding a butterfly spring.

[0028] 3. This invention, by adding a sealing cap, prevents the clamping piece from retracting and causing clamping failure.

[0029] 4. By adding sealing materials, this invention blocks external corrosive agents and achieves a sealing effect, effectively preventing corrosion of the anchoring section's wedges, anchor plates, and steel strands in the clamping part.

[0030] 5. The extrusion anchor sleeve of the present invention is a through-type extrusion anchor element, which, after extrusion installation, prevents the photovoltaic power generation system from collapsing due to slippage of the steel strand.

[0031] 6. The present invention uses a through-hole type tensioning and extrusion integrated device, which can tension the steel strands during cable hanging. It is small in size, light in weight, and convenient for construction and transportation.

[0032] 7. The tensioning and extrusion integrated device of the present invention can immediately extrude the anti-slip extrusion anchor sleeve after tensioning is completed, and has tensioning and extrusion functions.

[0033] 8. The anchoring method of the present invention has both tension anchoring and compression anti-loosening functions, is convenient and fast to construct, can effectively improve the safety factor of the photovoltaic cable system, and ensure the stable operation of photovoltaic power generation components. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the anchoring structure in this invention;

[0035] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0036] Figure 3 for Figure 1 Enlarged view of point B in the middle;

[0037] Figure 4 This is a schematic diagram of the integrated tensioning and extrusion device of the present invention;

[0038] Figure 5 This is a schematic diagram of the installation structure of the compression jack in this invention.

[0039] The components are: 1-sealing cap, 2-anchor plate, 3-cable, 4-clamping plate, 5-sealing material, 6-anti-slip compression anchor sleeve, 7-protective component, 8-support structure, 9-elastic component, 10-support frame, 11-mounting plate, 12-tensioning jack, 13-side plate, 14-compression jack, 15-radial compression die, 16-anchor hole, 17-connecting rod, 18-nut, 19-compression groove. Detailed Implementation

[0040] The present invention will be further described below with reference to specific embodiments shown in the accompanying drawings.

[0041] See Figures 1-5An anchoring method for photovoltaic cables is disclosed. Sealing material 5 is added between the anchor plate 2 and the supporting structure 8, between the sealing cap 1 and the anchor plate 2, between the sealing cap 1 and the cable 3, between the clamp 4 and the cable 3, and between the clamp 4 and the anchor plate 2. This sealant effectively blocks external corrosive agents and prevents corrosion of the clamp, anchor plate, and cable clamping section. A fixed anti-slip compression anchor sleeve 6 is provided at one end of the cable 3 to prevent the photovoltaic power generation system from collapsing due to cable slippage. Protective components 7 are provided around the anti-slip compression anchor sleeve 6 and the cable 3 to effectively prevent corrosion of the anti-slip compression anchor sleeve and the protruding cable. In short, the anchoring method of this invention significantly improves the corrosion resistance of photovoltaic cables.

[0042] This method includes the following steps:

[0043] Step S1. After pulling the cable 3 through the support structure 8 by using a winch or other traction mechanism, the anchor plate 2, the clamp 4, the sealing cover 1, and the anti-slip compression anchor sleeve 6 are sequentially put into the cable 3.

[0044] Step S2. Tension cable 3 to the design force value and then stop tensioning;

[0045] Step S3. Apply sealant 5 between anchor plate 2 and support structure 8, between sealing cap 1 and anchor plate 2, between sealing cap 1 and cable 3, between clamp 4 and cable 3, and between clamp 4 and anchor plate 2.

[0046] Step S4. Secure the sealing cap 1 to the periphery of the anchor plate 2, and make the sealing cap 1 press against the clamping piece 4 inside the conical hole of the anchor plate 2. The wedge-shaped structure between the clamping piece 4 and the conical hole makes the clamping piece 4 firmly bite the cable 3. The inner hole of the clamping piece 4 is provided with tooth-shaped or anti-slip textures to improve the stability of the biting and clamping. And trim the sealing material 5 between the anchor plate 2 and the support structure 8, the interface between the sealing cap 1 and the cable 3, and the interface between the sealing cap 1 and the anchor plate 2 so that the cross section of the sealing material 5 is triangular.

[0047] Step S5. Press the anti-slip compression anchor sleeve 6 onto the cable 3 by compression.

[0048] Preferably, step S1 further includes inserting the elastic element 9 into the cable 3 between the clamping piece 4 and the sealing cover 1; after the sealing cover 1 is fastened to the periphery of the anchor plate 2 in step S4, the sealing cover 1 is pressed against the clamping piece 4 in the conical hole of the anchor plate 2 by the elastic element 9, which plays a role in preventing the clamping piece from retracting and causing clamping failure. In this embodiment, the elastic element 9 is a butterfly spring.

[0049] The sealing cap 1 and the anchor plate 2 are connected by threads, meaning the anchor plate 2 has external threads, and the sealing cap 1 has internal threads that match the external threads of the anchor plate 2. In step S4, a torque wrench is used to apply a set force to tighten the sealing cap 1 and press it against the clamping plate 4. The set force is 15t to 20t.

[0050] In step S2, a tensioning and extrusion integrated device is first installed on the outside of the support structure 8, and one end of the cable 3 is connected to the output end of the tensioning integrated device; then the tensioning and extrusion integrated device is started to tension the cable 3 to the design force value and then tensioning is stopped.

[0051] The tensioning and extrusion integrated equipment used in this invention, such as Figure 4 , Figure 5 As shown, it includes a support frame 10, which is used to connect the support structure 8. The support frame 10 is equipped with a tension jack 12, which is aligned with the anchor hole 16 opened in the support structure 8. The support frame 10 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 10 between the tension jack 12 and the support structure 8. The radial compression mechanism and the tension jack 12 have the same axis.

[0052] In this embodiment, the radial extrusion mechanism includes at least two extrusion jacks 14, which are evenly arranged around the axis of the tensioning jack 12. Each extrusion jack 14 has a radial extrusion die 15 at its output end. Specifically, the radial extrusion die 15 is bolted to the extrusion piston of the extrusion jack 14.

[0053] The radial extrusion die 15 is provided with an extrusion groove 19. Preferably, the extrusion groove 19 has a circular arc structure, and after extrusion, the extrusion groove 19 forms a circle whose axis is coaxial with the axis of the tensioning jack 12.

[0054] The support frame 10 includes at least two connecting support structures 8 and side plates 13 evenly arranged around the tension jack 12. One end of each side plate 13 is connected to a mounting plate 11 for mounting the tension jack 12. The tension jack 12 is mounted on the mounting plate 11 by bolts.

[0055] In one embodiment, the number of compression jacks 14 is equal to the number of side plates 13, and they are installed on the side plates 13 one by one. The compression jacks 14 are installed on the side plates 13 by bolts.

[0056] In one embodiment, there are two compression jacks 14, which are located on the side plates 13 on both sides of the tensioning jack 12.

[0057] A reinforcing structure is provided between the side plates 13 on both sides.

[0058] In one embodiment, the reinforcing structure includes a connecting rod 17 that connects the two side plates 13. The connecting rod 17 has threaded sections at both ends, which pass through the side plates 13 and are then locked by nuts 18. During the pressing process, the pressing jacks 14 on both sides are subjected to a large reverse force. By tightening the side plates 13 through the connecting rod 17, the working strength of the side plates 13 can be improved, preventing the side plates 13 from deforming due to excessive reverse force from the pressing jacks 14.

[0059] Of course, the connecting rod 17 can also be connected to the side plate 13 by welding, or by a snap ring, or by a pin.

[0060] In one embodiment, the reinforcing structure is a connecting plate welded to the side plates 13 on both sides.

[0061] The above-mentioned tensioning and extrusion integrated equipment is used for photovoltaic cable anchoring, and step S2 includes the following steps:

[0062] Step S41. Install the support frame 10 on the outside of the support structure 8. Specifically, the side plate 13 of the support frame 10 is fixedly installed on the outside of the support structure 8 by welding or bolting.

[0063] Step S42. Install the tensioning jack 12 on the mounting plate 11 of the support frame 10, and align the tensioning jack 12 with the anchor hole 16 opened in the support structure 8.

[0064] Step S43. Install compression jacks 14 on the side plates 13 on both sides of the tensioning jack 12, install radial compression mold 15 at the output end of the compression jack 14, and install the connecting rod 17 and lock it with nut 18.

[0065] Step S44. Pass one end of cable 3 through tension jack 12;

[0066] Step S45. Start tensioning jack 12 to tension cable 3 to the design force value and then stop tensioning.

[0067] In step S5, the anti-slip compression anchor sleeve 6 is placed between two radial compression dies 15, and two compression jacks 14 are activated to press the anti-slip compression anchor sleeve 6 onto the cable 3.

[0068] The protective component 7 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 sealing cap 1. A hot air blower is used to heat the heat shrink tubing so that it shrinks fully until it completely covers the cable 3 and the anti-slip compression anchor sleeve 6.

[0069] 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 method for anchoring photovoltaic cables, characterized in that, Sealing material (5) is added between the sealing cap (1) and the anchor plate (2), between the sealing cap (1) and the cable (3), between the clamp (4) and the cable (3), and between the clamp (4) and the anchor plate (2); a fixed anti-slip compression anchor sleeve (6) is provided at one end of the cable (3), and a protective part (7) is provided on the periphery of the anti-slip compression anchor sleeve (6) and the cable (3); Includes the following steps: Step S1. After passing the cable (3) through the support structure (8), the anchor plate (2), the clamp (4), the sealing cap (1), and the anti-slip compression anchor sleeve (6) are sequentially put into the cable (3). Step S2. Tension the cable (3) to the design force value and then stop tensioning; Step S3. Apply sealant (5) between the anchor plate (2) and the support structure (8), between the sealing cap (1) and the anchor plate (2), between the sealing cap (1) and the cable (3), between the clip (4) and the cable (3), and between the clip (4) and the anchor plate (2). Step S4. Secure the sealing cap (1) to the periphery of the anchor plate (2) and make the sealing cap (1) press against the clamp (4) in the conical hole of the anchor plate (2). The wedge structure between the clamp (4) and the conical hole makes the clamp (4) firmly bite the cable (3). Step S5. Press the anti-slip compression anchor sleeve (6) onto the cable (3) by compression.

2. The anchoring method for photovoltaic cables according to claim 1, characterized in that, In step S1, a cable (3) between the clip (4) and the sealing cap (1) is inserted into an elastic element (9); in step S4, after the sealing cap (1) is fastened to the periphery of the anchor plate (2), the sealing cap (1) is pressed against the clip (4) in the conical hole of the anchor plate (2) by the elastic element (9).

3. The anchoring method for photovoltaic cables according to claim 2, characterized in that, The elastic element (9) is a butterfly spring.

4. The anchoring method for photovoltaic cables according to claim 1, characterized in that, In step S2, a tensioning and extrusion integrated device is first erected on the outside of the support structure (8), and one end of the cable (3) is connected to the output end of the tensioning integrated device; Then start the tensioning and extrusion integrated equipment to tension the cable (3) to the design force value and then stop tensioning.

5. The anchoring method for photovoltaic cables according to claim 4, characterized in that, Step S2 includes the following steps: Step S41. Install the support frame (10) on the outside of the support structure (8); Step S42. Install the tension jack (12) on the mounting plate (11) of the support frame (10) so that the tension jack (12) is aligned with the anchor hole (16) opened in the support structure (8); Step S43. Install extrusion jacks (14) on the side plates (13) on both sides of the tensioning jack (12), and install radial extrusion mold (15) at the output end of the extrusion jack (14). Step S44. Pass one end of the cable (3) through the tension jack (12); Step S45. Start the tensioning jack (12) to tension the cable (3) to the design force value and then stop tensioning.

6. The anchoring method for photovoltaic cables according to claim 1, characterized in that, The sealing cap (1) and the anchor plate (2) are connected by threads. In step S4, a torque wrench is used to apply a set force to tighten the sealing cap (1) and press against the clamp (4).

7. The anchoring method for photovoltaic cables according to claim 6, characterized in that, The set force is 15t to 20t.

8. The anchoring method for photovoltaic cables according to claim 5, characterized in that, In step S5, the anti-slip compression anchor sleeve (6) is placed between two radial compression dies (15), and two compression jacks (14) are activated to press the anti-slip compression anchor sleeve (6) onto the cable (3).

9. The anchoring method for photovoltaic cables according to claim 1, characterized in that, The protective component (7) 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 sealing cap (1). The heat shrink tubing is heated by a hot air blower to fully shrink it until it completely covers the cable (3) and the anti-slip compression anchor sleeve (6).

Images