Construction method of anti-slip steel strand photovoltaic inhaul cable arranged in full-length mode

Abstract

The invention discloses a construction method of a full-length anti-sliding steel strand photovoltaic inhaul cable, belongs to the technical field of photovoltaic inhaul cable construction, and solves the technical problems that an existing anti-sliding structure is complex and the maintenance cost is high. The method comprises the following steps: marking the mounting position of the anti-skid extrusion sleeve on the surface of the steel strand; the anti-sliding extrusion sleeve is extruded on the steel strand to obtain the steel strand photovoltaic inhaul cable; the steel strand photovoltaic inhaul cable is wound into a disc; mounting a middle column and an end column; the steel strand photovoltaic inhaul cables are pulled or hoisted to the positions corresponding to the middle columns and the end columns; an anti-sliding extrusion sleeve is embedded into a groove in the top of the middle column; the steel strand photovoltaic inhaul cable is anchored at the fixed end; the steel strand photovoltaic inhaul cable penetrates through an anchoring hole in the tensioning end; the steel strand photovoltaic inhaul cable is tensioned and anchored; an adhesive is injected into the groove to ensure that the anti-sliding extrusion sleeve is tightly bonded with the groove; and carrying out sealing anti-corrosion treatment. And the anti-sliding extrusion sleeve and the groove are tightly bonded through the adhesive, so that bolt-free anti-sliding is realized, and the structural complexity and the maintenance cost can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic cable construction, and more particularly to a construction method for a photovoltaic cable with a full-length anti-slip steel strand. Background Art

[0002] Traditional steel strand cables are prone to slipping at the center column nodes due to wind vibration or load changes, leading to structural instability. For example, patents CN221948109U and CN222234731U use fasteners to limit the position, but they need to rely on bolt tightening, which has high maintenance costs.

[0003] Moreover, traditional steel strand cables mostly use segmented steel strands at the center column nodes, and segmented different structures are used to connect the end columns and between the end columns and end piles. For example, in patent CN220325550U, the load is dispersed by inclined cables, but multiple cables are required to work together, and the structure is complex. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to address the above-mentioned deficiencies in the prior art. The purpose of the present invention is to provide a construction method for anti-slip steel strand photovoltaic cables that can achieve zero-bolt anti-slip and a simple structure with a full-length setting.

[0005] The technical solution of the present invention is: a method for constructing a photovoltaic cable with anti-slip steel strands arranged throughout the entire length, comprising the following steps:

[0006] Step 1. Material selection: select appropriate steel strand according to working conditions;

[0007] Step 2. Surface cleaning: cleaning and removing oil and impurities on the surface of the steel strand;

[0008] Step 3. Positioning marks: mark the installation position of the anti-slip extrusion sleeve on the surface of the steel strand according to the designed spacing;

[0009] Step 4. Pressing the anti-slip extrusion sleeve: Extruding the anti-slip extrusion sleeve on the steel strand by an extrusion device to complete the prefabrication of the steel strand photovoltaic cable;

[0010] Step 5. Cable reeling and protection: The prefabricated steel strand photovoltaic cable is wound into a reel and wrapped with a protective film and moisture-proof film to prevent damage during transportation or storage;

[0011] Step 6. Foundation pouring: pour the foundation of the center column and the end column according to the designed spacing, and install the center column and the end column on the foundation;

[0012] Step 7. Unfolding and pulling the cable: unfolding the steel strand photovoltaic cable, pulling or hoisting the steel strand photovoltaic cable to the corresponding positions of the middle column and the end column;

[0013] Step 8. Insert and fix the anti-slip extrusion sleeve of the center column. Insert the anti-slip extrusion sleeve of the steel strand photovoltaic cable into the groove at the top of the center column and make the anti-slip extrusion sleeve close to the inner wall of the groove near the fixed end;

[0014] Step 9. Make the fixed end cable on-site, passing the steel strand photovoltaic cable through the end column turning piece close to the fixed end and the anchor hole of the fixed end in sequence, and anchoring it to the fixed end through the anchor;

[0015] Step 10. Make the tensioning end cable on site, and sequentially pass the steel strand photovoltaic cable through the end column turning piece of the end column close to the tensioning end and the anchor hole of the tensioning end;

[0016] Step 11. After tensioning the steel strand photovoltaic cable at the tensioning end to a set tension using a tensioning jack, the steel strand photovoltaic cable is anchored using an anchor. After anchoring is completed, the excess portion of the steel strand photovoltaic cable is cut according to the designed length;

[0017] Step 12. Anchor the anti-slip extrusion sleeve of the center column by injecting adhesive into the groove to ensure that the anti-slip extrusion sleeve is tightly bonded to the groove;

[0018] Step 13: Sealing treatment: performing sealing and anti-corrosion treatment on the anchors at the fixed end and the tensioning end.

[0019] As a further improvement, the steel strand is any one of galvanized steel strand, galvanized aluminum steel strand, aluminum-clad steel strand, stainless steel strand, and HDPE sheathed steel strand.

[0020] Furthermore, the groove is located in the middle of the top of the center column.

[0021] Furthermore, positioning grooves for positioning the steel strand photovoltaic cable are respectively provided at both ends of the groove.

[0022] Furthermore, the end column steering member is a semicircular sleeve or a circular sleeve with an arc-shaped structure.

[0023] Furthermore, the end column steering member is made of stainless steel or aluminum alloy or a material with good corrosion resistance and wear resistance.

[0024] Furthermore, a buffer layer or a low-hardness wear-resistant sheet is filled between the end column steering member and the steel strand photovoltaic cable.

[0025] Furthermore, the end column is provided with an arc-shaped groove for installing the end column steering member.

[0026] Furthermore, the anchor is an extruded anchor sleeve, a hot-cast anchor sleeve, a cold-cast anchor sleeve, a clip-type anchor sleeve, or an extruded anchor sleeve + clip-type anchor sleeve.

[0027] Furthermore, performing sealing and anti-corrosion treatment on the fixed end and the tensioning end includes:

[0028] Applying anti-corrosion material to the gap between the anchor and the steel strand photovoltaic cable;

[0029] A heat shrink tubing is sheathed on the outer walls of the steel strand photovoltaic cable and the anchor.

[0030] Beneficial effects

[0031] Compared with the prior art, the present invention has the following advantages:

[0032] 1. Compared with the existing technology of fastening by bolts, the present invention wraps the steel strand with an anti-slip extrusion sleeve, and the anti-slip extrusion sleeve is inserted into the limiting groove of the center column. The anti-slip extrusion sleeve is tightly bonded to the groove through adhesive, which limits the sliding of the steel strand and achieves zero-bolt anti-slip, which can reduce structural complexity and maintenance costs.

[0033] 2. Compared with the existing technology that uses segmented different structural connections between the end column and the end pile, the present invention uses full-length steel strands, integrated load-bearing + side anchors, to solve the problem that the existing flexible photovoltaic cables require multiple cables to coordinate and have a complex structure.

[0034] 3. Arc transition at the end: Compared with the existing technology that uses anti-slip pads and cable clamps to prevent displacement, but relies on the tightening force of bolts and is prone to loosening after long-term use, the present invention uses a single steel strand to disperse stress through a semicircular sleeve or circular sleeve with an arc structure, which can simplify construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 is a flow chart of the present invention;

[0036] Figure 2 This is a schematic diagram of the structure obtained by the construction of the present invention;

[0037] Figure 3 Schematic diagram of the structure of the steel strand photovoltaic cable in the present invention;

[0038] Figure 4 This is a schematic diagram of the structure of the steel strand photovoltaic cable being pulled to the center column in the present invention;

[0039] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0040] Figure 6 This is a schematic structural diagram of the anti-slip extrusion sleeve in the present invention bonded by an adhesive;

[0041] Figure 7 This is a schematic diagram of the installation structure of the mid-end column steering member of the present invention;

[0042] Figure 8This is a schematic structural diagram of the anchoring device of the present invention as an extruded anchoring sleeve;

[0043] Figure 9 Schematic diagram of the structure of the anchor of the present invention is a clip-type anchor;

[0044] Figure 10 This is a structural diagram of the anchor in the present invention, which is an extruded anchor sleeve + clip-type anchor.

[0045] Among them: 1-steel wire, 2-anti-slip extrusion sleeve, 3-steel wire photovoltaic cable, 4-middle column, 5-end column, 6-groove, 7-fixed end, 8-end column steering member, 9-tensioning end, 10-anchor, 11-adhesive, 12-positioning groove, 13-arc groove, 14-extruded anchor sleeve, 15-anti-corrosion material, 16-heat shrink sleeve, 17-waterproof cover, 18-anchor plate, 19-clip, 20-top sleeve. DETAILED DESCRIPTION

[0046] The present invention will be further described below with reference to the specific embodiments in the accompanying drawings.

[0047] See Figures 1 to 10 A method for constructing a full-length anti-slip steel strand photovoltaic cable comprises the following steps:

[0048] Step 1. Material selection: Select the appropriate steel strand 1 according to the working conditions. Depending on the working conditions of the photovoltaic panel (the photovoltaic panel is installed on the steel strand 1), the steel strand 1 can be any of galvanized steel strand, galvanized aluminum steel strand, aluminum-clad steel strand, stainless steel strand, and HDPE sheathed steel strand.

[0049] Step 2. Surface cleaning: clean and remove oil and impurities on the surface of the steel strand 1 to ensure the grip strength of the anti-slip extrusion sleeve 2;

[0050] Step 3. Positioning mark: mark the installation position of the anti-slip extrusion sleeve 2 on the surface of the steel strand 1 according to the designed spacing (such as 30m);

[0051] Step 4. Pressing the anti-slip extrusion sleeve: The anti-slip extrusion sleeve 2 is squeezed onto the steel strand 1 by an extrusion device to complete the prefabrication of the steel strand photovoltaic cable 3. Prefabricating a single full-length steel strand semi-finished product in the factory can solve the problem of large construction errors in the actual anchor point spacing. The factory prefabrication environment is good and the efficiency is high.

[0052] Step 5. Cable reeling and protection: The prefabricated steel strand photovoltaic cable 3 is wound into a reel and wrapped with a protective film and a moisture-proof film (first the protective film, then the moisture-proof film) to prevent damage during transportation or storage.

[0053] Step 6. Foundation pouring: pour the foundation of the middle column 4 and the end column 5 according to the designed spacing, and install the middle column 4 and the end column 5 on the foundation;

[0054] Step 7. Unfolding and pulling the cables: Unfold the steel strand photovoltaic cables 3 and pull or hoist the steel strand photovoltaic cables 3 to the corresponding positions of the middle column 4 and the end column 5;

[0055] Step 8. Insert and fix the anti-slip extrusion sleeve of the middle column. Insert the anti-slip extrusion sleeve 2 of the steel strand photovoltaic cable 3 into the groove 6 at the top of the middle column 4, and make the anti-slip extrusion sleeve 2 close to the inner wall of the groove 6 and close to the fixed end 7. Figure 4 As shown;

[0056] Step 9. Make the fixed end cable on site. Pass the steel strand photovoltaic cable 3 through the end column turning piece 8 of the end column 5 close to the fixed end 7 and the anchor hole of the fixed end 7 in sequence, and anchor it to the fixed end 7 through the anchor 10.

[0057] Step 10. Make the tensioning end cable on site, and pass the steel strand photovoltaic cable 3 through the end column turning piece 8 of the end column 5 close to the tensioning end 9 and the anchor hole of the tensioning end 9 in sequence;

[0058] Step 11. After the steel strand photovoltaic cable 3 at the tensioning end 9 is tensioned to the set tension using a tensioning jack, the anti-slip extrusion sleeve 2 moves toward the middle of the groove 6 after the steel strand photovoltaic cable 3 is stretched, and the steel strand photovoltaic cable 3 is anchored by the anchor 10. After the anchoring is completed, the excess portion of the steel strand photovoltaic cable 3 is cut according to the designed length;

[0059] Step 12. Anchor the anti-slip extrusion sleeve of the center column. Inject adhesive 11 into the groove 6 to ensure that the anti-slip extrusion sleeve 2 is tightly bonded to the groove 6. The anti-slip extrusion sleeve 2 and the adhesive restrict the steel strand from sliding, eliminating the need for bolt tightening and reducing maintenance costs.

[0060] Step 13: Sealing treatment: sealing and anti-corrosion treatment is performed on the anchors 10 at the fixed end 7 and the tensioning end 9.

[0061] Specifically, the groove 6 is located in the middle of the top of the center column 4 , and positioning grooves 12 for positioning the steel strand photovoltaic cable 3 are respectively provided at both ends of the groove 6 .

[0062] The end column steering member 8 is a semicircular sleeve or a circular sleeve with an arc-shaped structure, and the inner wall is an arc-shaped transition. The end column 5 is provided with an arc groove 13 for installing the end column steering member 8. Furthermore, a buffer layer or a low-hardness wear-resistant sheet is filled between the end column steering member 8 and the steel strand photovoltaic cable 3 to reduce the friction between the end column steering member 8 and the steel strand photovoltaic cable 3. Preferably, the end column steering member 8 is made of stainless steel or aluminum alloy or other materials with good corrosion resistance and wear resistance. The end column steering member 8 is used to reduce the stress concentration at the corner of the steel strand end column.

[0063] A self-balancing system is formed by the anti-slip extrusion sleeve 2 of the center column 4 and the end column steering member 8 of the end column 5, eliminating the traditional side tie rod, thereby simplifying the structure and reducing material costs.

[0064] The anchor 10 is an extruded anchor sleeve 14 or a hot cast anchor or a cold cast anchor or a clip-type anchor or an extruded anchor sleeve 14 + a clip-type anchor.

[0065] Clip-type anchors such as Figure 9 As shown, it includes an anchor plate 18, a clip 19, and a top sleeve 20. One end of the steel strand photovoltaic cable 3 passes through the anchor plate 18 and is clamped by the clip 19. Then, the top sleeve 20 is screwed into the anchor plate 18 (the anchor plate 18 and the top sleeve 20 are threadedly connected) to tighten the clip 19.

[0066] Extruded anchor sleeve 14+ clip type anchor such as Figure 10 As shown, the steel strand photovoltaic cable 3 is first anchored by a clip-type anchor, and then the anchor sleeve 14 is extruded on the steel strand photovoltaic cable 3 to prevent the steel strand photovoltaic cable 3 from collapsing in the event of failure of the clip-type anchor.

[0067] The sealing and anti-corrosion treatment of the fixed end 7 and the tensioning end 9 includes:

[0068] A waterproof cover 17 is provided between the steel strand photovoltaic cable 3 and the fixed end 7 and the tensioning end 9.

[0069] Apply anti-corrosion material 15 to the gap between the anchor 10 and the steel strand photovoltaic cable 3; Figures 8-10 As shown, anti-corrosion material 15 is applied to the gap between the extruded anchor sleeve 14 or the clip-type anchor and the steel strand photovoltaic cable 3;

[0070] Heat shrink tubing 16 is sheathed on the outer wall of the steel strand photovoltaic cable 3 and the anchor 10; Figure 8 As shown, a heat shrink tubing 16 is sleeved on the outer wall of the steel strand photovoltaic cable 3 and the extruded anchor sleeve 14 (the heat shrink tubing 16 is first sleeved, and then heated by a hot air blower to shrink it).

[0071] Of course, if Figure 10 As shown, the heat shrink tubing 16 may also completely wrap the clip-type anchor and the extruded anchor sleeve 14 .

[0072] 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 method for constructing a full-length anti-slip steel strand photovoltaic cable, characterized in that: The following steps are involved: Step 1. Material selection: Select appropriate steel strand according to working conditions (1); Step 2. Surface cleaning: cleaning and removing oil stains and impurities on the surface of the steel strand (1); Step 3. Positioning marks: marking the installation position of the anti-slip extrusion sleeve (2) on the surface of the steel strand (1) according to the designed spacing; Step 4. Pressing the anti-slip extrusion sleeve: Extruding the anti-slip extrusion sleeve (2) on the steel strand (1) through an extrusion device to complete the prefabrication of the steel strand photovoltaic cable (3); Step 5. Cable reeling and protection: the prefabricated steel strand photovoltaic cable (3) is reeled into a reel and wrapped with a protective film and a moisture-proof film to prevent damage during transportation or storage; Step 6. Foundation pouring: pouring the foundation of the middle column (4) and the end column (5) according to the designed spacing, and installing the middle column (4) and the end column (5) on the foundation; Step 7. Unfolding and pulling the cable: unfolding the steel strand photovoltaic cable (3), pulling or hoisting the steel strand photovoltaic cable (3) to positions corresponding to the middle column (4) and the end column (5); Step 8. The anti-slip extrusion sleeve of the middle column is embedded and fixed. The anti-slip extrusion sleeve (2) of the steel strand photovoltaic cable (3) is embedded in the groove (6) at the top of the middle column (4), and the anti-slip extrusion sleeve (2) is close to the inner wall of the groove (6) close to the fixed end (7); Step 9. Making the fixed end cable on site, passing the steel strand photovoltaic cable (3) through the end column steering piece (8) of the end column (5) close to the fixed end (7), the anchor hole of the fixed end (7), and anchoring it to the fixed end (7) through the anchor (10); Step 10. On-site cable making at the tensioning end, the steel strand photovoltaic cable (3) is sequentially passed through the end column steering piece (8) of the end column (5) close to the tensioning end (9) and the anchor hole of the tensioning end (9); Step 11. After tensioning the steel strand photovoltaic cable (3) at the tensioning end (9) to a set tension force using a tensioning jack, the steel strand photovoltaic cable (3) is anchored by an anchor (10). After the anchoring is completed, the excess portion of the steel strand photovoltaic cable (3) is cut according to the designed length; Step 12. Anchoring the anti-slip extrusion sleeve of the center column, injecting adhesive (11) into the groove (6) to ensure that the anti-slip extrusion sleeve (2) is tightly bonded to the groove (6); Step 13: Sealing treatment: performing sealing and anti-corrosion treatment on the anchors (10) of the fixed end (7) and the tensioning end (9).

2. The method for constructing a full-length anti-slip steel strand photovoltaic cable according to claim 1, characterized in that: The steel strand (1) is any one of galvanized steel strand, galvanized aluminum steel strand, aluminum-clad steel strand, stainless steel strand, and HDPE sheathed steel strand.

3. The method for constructing a full-length anti-slip steel strand photovoltaic cable according to claim 1, characterized in that: The groove (6) is located in the middle of the top of the center column (4).

4. The method for constructing a full-length anti-slip steel strand photovoltaic cable according to claim 1, characterized in that: Positioning grooves (12) for positioning the steel strand photovoltaic cable (3) are respectively provided at both ends of the groove (6).

5. The method for constructing a full-length anti-slip steel strand photovoltaic cable according to claim 1, characterized in that: The end column steering member (8) is a semicircular sleeve or a circular sleeve with an arc-shaped structure.

6. The method for constructing a full-length anti-slip steel strand photovoltaic cable according to claim 5, characterized in that: The end column steering member (8) is made of stainless steel or aluminum alloy or a material with good corrosion resistance and wear resistance.

7. The method for constructing a full-length anti-slip steel strand photovoltaic cable according to claim 5, characterized in that: A buffer layer or a low-hardness wear-resistant sheet is filled between the end column steering member (8) and the steel strand photovoltaic cable (3).

8. The method for constructing a full-length anti-slip steel strand photovoltaic cable according to claim 5, characterized in that: The end column (5) is provided with an arcuate groove (13) for mounting the end column steering member (8).

9. A method for constructing a full-length anti-slip steel strand photovoltaic cable according to any one of claims 1 to 8, characterized in that: The anchor (10) is an extruded anchor sleeve (14), a hot-cast anchor, a cold-cast anchor, a clip-type anchor, or an extruded anchor sleeve (14) + a clip-type anchor.

10. The method for constructing a full-length anti-slip steel strand photovoltaic cable according to claim 9, characterized in that: The sealing and anti-corrosion treatment of the fixed end (7) and the tensioning end (9) includes: Applying anti-corrosion material (15) to the gap between the anchor (10) and the steel strand photovoltaic cable (3); A heat shrink tubing (16) is sleeved on the outer walls of the steel strand photovoltaic cable (3) and the anchor (10).

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