Installation method of photovoltaic pull cable

Abstract

The application discloses a kind of installation construction methods of photovoltaic cable-stayed, belong to photovoltaic cable-stayed installation technical field, solve the technical problem that current anchoring mode stability is insufficient or cost is high, method is: according to the cable-stayed anchorage point distance provided on site, the cable length is calculated;According to the cable length, the photovoltaic cable-stayed of extrusion sleeve anchoring type is prefabricated in factory two ends, and before the tensioning end of photovoltaic cable-stayed is prefabricated extrusion sleeve, first adjust screw sleeve is inserted into the tensioning end of photovoltaic cable-stayed;Screw support cylinder is installed to the reserved hole of field base plate;The extrusion sleeve of photovoltaic cable-stayed is passed through screw support cylinder;Through tensioning equipment, photovoltaic cable-stayed is tensioned to design force value using the tensioning end of photovoltaic cable-stayed;Adjust screw sleeve is screwed into the through hole of screw support cylinder, until the end surface of adjust screw sleeve is tightly pressed extrusion sleeve;Remove the tensioning force of photovoltaic cable-stayed and tensioning equipment, according to actual need, cut the tensioning end of photovoltaic cable-stayed;Adjust screw sleeve and screw support cylinder are fixedly connected.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic cable installation, and more particularly to an installation and construction method of a photovoltaic cable. Background Art

[0002] Photovoltaic cables are mainly used for bearing the weight of photovoltaic components, and require safe and stable anchoring performance. Currently, the main anchoring methods are clip type and extrusion sleeve + fork ear combination. Clip type anchoring method is as follows Figure 1 As shown in the figure, the photovoltaic cable A is anchored to the pressure-bearing structure E through the anchor plate B, the clip C, and the anti-loosening sleeve D. The extrusion sleeve + fork ear combined anchoring method is as follows Figure 2 As shown, the photovoltaic cable A is connected to the pressure-bearing structure E through the extrusion sleeve F, the connector G, the adjustment sleeve H, the fork ear I, and the ear plate J in sequence.

[0003] These two methods have the following shortcomings:

[0004] 1. The clip-type anchoring is not stable enough. When the photovoltaic field encounters severe weather such as strong winds, the photovoltaic cable may be in a state of negative stress (cable backflow), which may easily cause the clip to slip, posing a safety hazard.

[0005] 2. The cost of the extrusion sleeve + fork ear combination is high. The cable manufacturer adds an adjustment sleeve and fork ear. The on-site steel structure needs to be equipped with a connecting ear plate, which will increase the manufacturing cost. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to address the above-mentioned deficiencies in the prior art, and the purpose of the present invention is to provide an installation and construction method for photovoltaic cables.

[0007] The technical solution of the present invention is: a photovoltaic cable installation and construction method, comprising the following steps:

[0008] Step 1. Calculate the cable length based on the cable anchor point distance provided on site;

[0009] Step 2. Prefabricate a photovoltaic cable with extruded sleeves at both ends and anchored at the factory according to the cable length. Before prefabricating the extruded sleeves at the tensioning ends of the photovoltaic cable, insert the adjusting screw sleeve into the tensioning ends of the photovoltaic cable.

[0010] Step 3. Install the threaded support tube into the reserved hole of the on-site pad;

[0011] Step 4. Pass the extrusion sleeve of the photovoltaic cable through the through-hole of the threaded support cylinder;

[0012] Step 5. Using the tensioning end of the photovoltaic cable through a tensioning device, tensioning the photovoltaic cable to a designed force value;

[0013] Step 6. Screw the adjusting screw sleeve into the through hole of the threaded support tube until the adjusting screw sleeve presses against the end surface of the extrusion sleeve;

[0014] Step 7. Remove the tensioning force and tensioning equipment of the photovoltaic cable, and cut the tensioned end of the photovoltaic cable according to actual needs;

[0015] Step 8. Fixedly connect the adjusting screw sleeve to the threaded support tube.

[0016] As a further improvement, one end of the threaded support tube is provided with a flange for bearing pressure on the side wall of the on-site pad.

[0017] Furthermore, the flange is fixedly connected to the on-site pad by welding or bolts.

[0018] Furthermore, a first adjusting thread is provided in the through hole of the threaded support tube, and a second adjusting thread that is compatible with the first adjusting thread is provided on the outer wall of the adjusting screw sleeve.

[0019] Furthermore, the adjusting screw sleeve is fixedly connected to the threaded support cylinder by a set screw.

[0020] Furthermore, the threaded support cylinder is provided with a set screw hole.

[0021] Furthermore, the adjusting screw sleeve is fixedly connected to the threaded support cylinder by welding.

[0022] Furthermore, in step 1, the distance between the anchor points of the cable is obtained through on-site surveying.

[0023] Furthermore, in step 1, the cable length is obtained by the cable anchor point distance + the length of the extrusion sleeve + the tensioned connection section of the photovoltaic cable - the tensioned elongation of the photovoltaic cable, wherein the cable anchor point distance - the tensioned elongation of the photovoltaic cable is obtained by the anchoring position of the extrusion sleeve.

[0024] Furthermore, after step 8, anti-corrosion measures are taken on the adjusting screw sleeve and the threaded support tube.

[0025] Beneficial effects

[0026] Compared with the prior art, the present invention has the following advantages:

[0027] The present invention prefabricates photovoltaic cables with extruded sleeves anchored at both ends in the factory according to the distance between the cable anchor points. After the photovoltaic cables are tensioned to the designed force value on site, the adjusting screw sleeve is screwed into the threaded support tube to tighten the end face of the extruded sleeve, and the adjusting screw sleeve is fixedly connected to the threaded support tube, which can prevent the adjusting screw sleeve from loosening in the threaded support tube, and overcomes the safety hazard of clip slippage caused by the photovoltaic cables being in a state of negative stress in the existing clip-type anchoring method. Compared with the existing extrusion sleeve + fork ear combination method, the prefabricated photovoltaic cables of the present invention have a simple structure and a simple adjustment structure, reduce the fork ears and their supporting connection devices, bring the beneficial effect of cost optimization, and reduce the process and complexity of cable installation, which brings the beneficial effect of improved manufacturing and installation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the existing clip-type anchoring method;

[0029] Figure 2 This is a schematic diagram of the existing extrusion sleeve + fork ear combined anchoring method;

[0030] Figure 3 It is a structural schematic diagram of the present invention;

[0031] Figure 4 Schematic diagram of the structure of the threaded support cylinder in the present invention;

[0032] Figure 5 It is a structural schematic diagram of the adjusting screw sleeve in the present invention.

[0033] Among them: 1-photovoltaic cable, 2-tensioning end, 3-extrusion sleeve, 4-adjusting screw sleeve, 5-threaded support cylinder, 6-on-site pad, 7-through hole, 8-flange, 9-first adjusting thread, 10-second adjusting thread, 11-set screw. DETAILED DESCRIPTION

[0034] The present invention will be further described below with reference to the specific embodiments in the accompanying drawings.

[0035] See Figures 3 to 5 A photovoltaic cable installation and construction method comprises the following steps:

[0036] Step 1. Calculate the cable length based on the cable anchor point distance provided on site;

[0037] Step 2. Prefabricate the photovoltaic cable 1 with extruded sleeves at both ends in the factory according to the cable length. Before prefabricating the extruded sleeve 3 at the tensioning end 2 of the photovoltaic cable 1, insert the adjusting screw sleeve 4 into the tensioning end 2 of the photovoltaic cable 1. Prefabricating the photovoltaic cable 1 in the factory is convenient and low-cost.

[0038] Step 3. Install the threaded support tube 5 into the reserved hole of the on-site pad 6, and the on-site pad 6 is installed on the pressure-bearing structure on the tensioning side;

[0039] Step 4. Pass the extrusion sleeve 3 of the photovoltaic cable 1 through the through hole 7 of the threaded support tube 5;

[0040] Step 5. Using the tensioning equipment, the photovoltaic cable 1 is tensioned to the designed force value using the tensioning end 2 of the photovoltaic cable 1. During the tensioning process, the fixed end of the photovoltaic cable 1 (i.e., the end opposite to the tensioning end 2) is anchored to the pressure-bearing structure on the fixed side through the extrusion sleeve and the fixing pad.

[0041] Step 6. Screw the adjusting screw sleeve 4 into the through hole 7 of the threaded support tube 5 until the adjusting screw sleeve 4 presses against the end surface of the extrusion sleeve 3;

[0042] Step 7. Remove the tensioning force and tensioning equipment of the photovoltaic cable 1 and cut the tensioning end 2 of the photovoltaic cable 1 according to actual needs;

[0043] Step 8. Securely connecting the adjusting screw sleeve 4 to the threaded support tube 5 prevents the adjusting screw sleeve 4 from loosening within the threaded support tube 5, overcoming the potential safety hazard of clip thread slippage caused by negative stress in the existing clip-type anchoring method. Compared to the existing extrusion sleeve + fork ear combination, the prefabricated photovoltaic cable of the present invention has a simpler structure and adjustment mechanism, eliminating fork ears and their supporting connection devices, resulting in cost optimization. It also reduces the process and complexity of cable installation, resulting in improved manufacturing and installation efficiency.

[0044] Specifically, one end of the threaded support cylinder 5 is provided with a flange 8 for bearing pressure on the side wall of the on-site pad 6. The flange 8 is fixedly connected to the on-site pad 6 by welding or bolts.

[0045] A first adjusting thread 9 is provided in the through hole 7 of the threaded support tube 5 , and a second adjusting thread 10 matched with the first adjusting thread 9 is provided on the outer wall of the adjusting screw sleeve 4 .

[0046] In one embodiment, the adjusting screw sleeve 4 is fixedly connected to the threaded support tube 5 by a set screw 11 , and accordingly, the threaded support tube 5 is provided with a set screw hole.

[0047] In one embodiment, the adjusting screw sleeve 4 is fixedly connected to the threaded support cylinder 5 by welding.

[0048] In step 1, the cable anchor point distance is determined through on-site surveying. The cable length is calculated by adding the cable anchor point distance + the length of the extrusion sleeve 3 + the tensioned connection section of the photovoltaic cable 1 - the tensioned elongation of the photovoltaic cable 1. The anchor position of the extrusion sleeve 3 is calculated by subtracting the tensioned elongation of the photovoltaic cable 1 from the cable anchor point distance.

[0049] The present invention further includes, after step 8, taking anti-corrosion measures on the adjusting screw sleeve 4 and the threaded support tube 5. The anti-corrosion measures include at least one of applying sealant and installing a heat shrink sleeve.

[0050] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention. These will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A photovoltaic cable installation and construction method, characterized in that: The following steps are involved: Step 1. Calculate the cable length based on the cable anchor point distance provided on site; Step 2. Prefabricate a photovoltaic cable (1) with extruded sleeves at both ends and anchored in a factory according to the length of the cable, and before prefabricating the extruded sleeve (3) at the tensioning end (2) of the photovoltaic cable (1), first insert the adjusting screw sleeve (4) into the tensioning end (2) of the photovoltaic cable (1); Step 3. Install the threaded support tube (5) into the reserved hole of the on-site pad (6); Step 4. Pass the extrusion sleeve (3) of the photovoltaic cable (1) through the through hole (7) of the threaded support tube (5); Step 5. Using the tensioning end (2) of the photovoltaic cable (1) through a tensioning device, the photovoltaic cable (1) is tensioned to a designed force value; Step 6. Screw the adjusting screw sleeve (4) into the through hole (7) of the threaded support tube (5) until the adjusting screw sleeve (4) presses against the end surface of the extrusion sleeve (3); Step 7. Remove the tensioning force and tensioning equipment of the photovoltaic cable (1), and cut the tensioning end (2) of the photovoltaic cable (1) according to actual needs; Step 8. Fixedly connect the adjusting screw sleeve (4) and the threaded support cylinder (5); In step 1, the distance of the cable anchor points is obtained through on-site surveying; In step 1, the cable length is obtained by the cable anchor point distance + the length of the extrusion sleeve (3) + the tension connection section of the photovoltaic cable (1) - the tension elongation of the photovoltaic cable (1), wherein the cable anchor point distance - the tension elongation of the photovoltaic cable (1) is obtained to obtain the anchoring position of the extrusion sleeve (3).

2. The photovoltaic cable installation and construction method according to claim 1, characterized in that: One end of the threaded support cylinder (5) is provided with a flange (8) for bearing pressure on the side wall of the on-site pad (6).

3. The photovoltaic cable installation and construction method according to claim 2, characterized in that: The flange (8) is fixedly connected to the on-site pad (6) by welding or bolts.

4. The photovoltaic cable installation and construction method according to claim 1, characterized in that: A first adjusting thread (9) is provided in the through hole (7) of the threaded support cylinder (5), and a second adjusting thread (10) adapted to the first adjusting thread (9) is provided on the outer wall of the adjusting screw sleeve (4).

5. A photovoltaic cable installation and construction method according to any one of claims 1 to 4, characterized in that: The adjusting screw sleeve (4) is fixedly connected to the threaded support cylinder (5) via a set screw (11).

6. The photovoltaic cable installation and construction method according to claim 5, characterized in that: The threaded support cylinder (5) is provided with a set screw hole.

7. A photovoltaic cable installation and construction method according to any one of claims 1 to 4, characterized in that: The adjusting screw sleeve (4) is fixedly connected to the threaded support cylinder (5) by welding.

8. The photovoltaic cable installation and construction method according to claim 1, characterized in that: After step 8, anti-corrosion measures are taken on the adjusting screw sleeve (4) and the threaded support cylinder (5).

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