Anchoring construction method of photovoltaic pull cable

Abstract

The application discloses an anchoring construction method of a photovoltaic cable, and belongs to the technical field of cable anchoring, and solves the technical problem that cable force in the middle of a cable is greatly lost when the cable is anchored by a whole extrusion sleeve, the method being: a combined extrusion sleeve is anchored on both sides of at least one middle pile I-beam in the middle or close to the middle of the photovoltaic cable by a radial extrusion mode. The specific process is as follows: step 1, determining the number and position of the middle pile I-beams that need to be anchored with the combined extrusion sleeve; step 2, anchoring the photovoltaic cable by using a whole extrusion sleeve on one side of the end pile I-beam; step 3, starting from the side close to the end pile I-beam that has been anchored, sequentially anchoring the combined extrusion sleeve on both sides of the middle pile I-beams determined in step 1; and step 4, anchoring the photovoltaic cable by using a whole extrusion sleeve on the other side of the end pile I-beam. The application can solve the problem that the cable force is greatly lost due to the cable being too long.

Description

Technical Field

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

[0002] Conventional extrusion sleeves are typically monolithic cylindrical, formed through axial cold extrusion or radial pressing to anchor the sleeve to the tendon. Conventional monolithic extrusion sleeves require the sleeve and extrusion equipment to be passed through the tendon. After extrusion is complete, the extrusion equipment must be removed from the non-stressed rear end of the tendon.

[0003] However, when it is necessary to use the extrusion sleeve method to anchor a long prestressed tendon, especially in the flexible photovoltaic cable assembly, the length of the component cable can reach thousands of meters. Figure 1 、 Figure 2 As shown, the component cable A is anchored to the end pile I-beams D of the end piles C on both sides through the integral extrusion sleeve B, and the free section of the cable body of the component cable A is arranged above and below the middle pile I-beam F of the middle pile E.

[0004] The more contact component cable A has with the center pile I-beam F, the greater the friction and the greater the loss of cable force. This can cause the tensioning force of component cable A to be gradually lost at the point where the cable body contacts the I-beam during tensioning at both ends. Component cable A at the center pile I-beam F, far from the end pile C, has no cable force and is in a zero-stress state, preventing the cable net from forming. Summary of the Invention

[0005] 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 a method for anchoring a photovoltaic cable.

[0006] The technical solution of the present invention is: a photovoltaic cable anchoring construction method, which uses radial extrusion to anchor a combined extrusion sleeve on both sides of at least one center pile I-beam in the middle of the photovoltaic cable or near the middle.

[0007] As a further improvement, the specific process is as follows:

[0008] Step 1. Determine the number and location of the center pile I-beams that need to anchor the combined extrusion sleeve;

[0009] Step 2. Anchor the photovoltaic cable using an integral extruded sleeve at the end pile I-beam on one side;

[0010] Step 3. Starting from the side close to the already anchored end pile I-beam, anchor the combined extrusion sleeve on both sides of the middle pile I-beam determined in step 1 in sequence;

[0011] Step 4. An integral extruded sleeve is used to anchor the photovoltaic cable to the end pile I-beam on the other side.

[0012] Furthermore, in step 3, when anchoring each center pile I-beam, the photovoltaic cable is first tensioned to a set value, and then the combined extrusion sleeve is assembled and sleeved on the anchoring position of the photovoltaic cable, and then the combined extrusion sleeve is pressed into shape by a radial extrusion device, and finally the radial extrusion device is removed.

[0013] Furthermore, the combined extrusion sleeve includes two sleeves with the same structure, the outer side of the sleeve is a semicircular arc structure, the inner side of the sleeve is provided with a semicircular groove, the sleeve on one side of the semicircular groove is provided with at least one layer of clamping keys, and the sleeve on the other side of the semicircular groove is provided with a clamping key groove adapted to the clamping key. When the two sleeves are combined, the clamping key of one sleeve is inserted into the clamping key groove of the other sleeve.

[0014] Furthermore, the pressing key is an arc-shaped plate structure.

[0015] Furthermore, there is a clearance fit between the pressing key and the pressing key slot.

[0016] Furthermore, when the number of the pressing keys is greater than one, the size of the pressing key close to the outside of the sleeve is larger than the size of the pressing key far from the outside of the sleeve.

[0017] Furthermore, the number of the pressing keys is 2, and accordingly, the number of the pressing key slots is 2, and they correspond one-to-one to the pressing keys.

[0018] Beneficial effects

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] 1. The present invention changes the stress form of the photovoltaic module cable. During the cable net adjustment process, combined extrusion sleeves are made on both sides of the center pile I-steel for anchoring. This can solve the problem of large cable force loss caused by friction with the center pile I-steel when the module cable is too long during tensioning on both sides, thereby ensuring the linear shape of the cable net.

[0021] 2. The combined extrusion sleeve of the present invention has the obvious advantage of being post-installable and easy to operate for radial extrusion. The double or multi-layered compression keys and corresponding keyways provided in the combined extrusion sleeve achieve deformation, compression and anchoring during radial extrusion. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Provide installation diagrams for existing components;

[0023] Figure 2 for Figure 1 Left view in;

[0024] Figure 3 It is a structural schematic diagram of the present invention;

[0025] Figure 4 It is a structural schematic diagram of the combined extrusion sleeve in the present invention;

[0026] Figure 5 This is a structural diagram of the combined extrusion sleeve in the present invention being sleeved on the photovoltaic cable;

[0027] Figure 6 This is a schematic structural diagram of the combined extrusion sleeve before extrusion in the present invention;

[0028] Figure 7 It is a schematic diagram of the structure of the combined extrusion sleeve after extrusion in the present invention.

[0029] Among them: 1-combined extrusion sleeve, 2-photovoltaic cable, 3-middle pile I-beam, 4-end pile I-beam, 5-integral extrusion sleeve, 6-semicircular sleeve, 7-semicircular groove, 8-clamping key, 9-clamping keyway, 10-middle pile, 11-end pile. DETAILED DESCRIPTION

[0030] The present invention will be further described below with reference to the specific embodiments in the accompanying drawings.

[0031] See Figures 3 to 7 A photovoltaic cable anchoring construction method is primarily used for longer photovoltaic cables, such as those up to 1000 meters or longer. During the cable net installation process, multiple center piles 10 are installed between the end piles 11 on either side. The end piles 11 are provided with end pile I-beams 4, and the center piles 10 are provided with center pile I-beams 3. The ends of the photovoltaic cable 2 are anchored to the two end pile I-beams 4, respectively. The middle portion of the photovoltaic cable 2 passes through or overlaps the center pile I-beams 3, creating frictional resistance where the photovoltaic cable 2 contacts the center pile I-beams 3.

[0032] The anchoring construction method uses radial extrusion to anchor the combined extrusion sleeve 1 on both sides of at least one center pile I-beam 3 in the middle of the photovoltaic cable 2 or close to the middle.

[0033] The combined extrusion sleeve 1 used in this anchoring construction method includes two semicircular sleeves 6 of identical structure. The outer side of the semicircular sleeve 6 is a semicircular arc structure, and the inner side of the semicircular sleeve 6 is provided with a semicircular groove 7. The semicircular sleeve 6 on one side of the semicircular groove 7 is provided with at least one layer of compression key 8, and the semicircular sleeve 6 on the other side of the semicircular groove 7 is provided with a compression key groove 9 adapted to the compression key 8. When the two semicircular sleeves 6 are combined, the compression key 8 of one semicircular sleeve 6 is inserted into the compression key groove 9 of the other semicircular sleeve 6. The semicircular groove 7 is located in the center position, that is, the axis of the semicircular groove 7 coincides with the axis of the semicircular sleeve 6.

[0034] The specific process is as follows:

[0035] Step 1. Determine the number and position of the center pile I-beams 3 to which the combined extrusion sleeve 1 needs to be anchored, that is, determine the center pile I-beams 3 to which the combined extrusion sleeve 1 needs to be anchored based on the cable force required during cable net installation;

[0036] Step 2. Anchor the photovoltaic cable 2 with an integral extruded sleeve 5 at the end pile I-beam 4 on one side. The integral extruded sleeve 5 can be used to anchor the photovoltaic cable 2 using existing or conventional anchoring methods, such as an integral cylindrical extruded sleeve, which is then extruded by axial cold extrusion or radial pressing.

[0037] Step 3. Starting from the side close to the already anchored end pile I-beam 4, anchor the combined extrusion sleeves 1 on both sides of the middle pile I-beam 3 determined in step 1. The two combined extrusion sleeves 1 clamp the middle pile I-beam 3;

[0038] Step 4. An integral extruded sleeve 5 is used to anchor the photovoltaic cable 2 at the end pile I-beam 4 on the other side, that is, tensioning is performed first and then anchoring.

[0039] In step 3, when anchoring each center pile I-beam 3, first pull the photovoltaic cable 2 to the set value to ensure the cable force required for the cable net installation. Then assemble the combined extrusion sleeve 1 and sleeve it on the anchoring position of the photovoltaic cable 2. The assembly process is as follows: first, bring the semicircular groove 7 of one semicircular sleeve 6 close to the photovoltaic cable 2, stagger the other semicircular sleeve 6 by a certain distance and bring the semicircular groove 7 close to the photovoltaic cable 2, align the corresponding clamping keys 8 and clamping key slots 9 of the two semicircular sleeves 6, clamp them in place from the end face, and flatten the two semicircular sleeves 6. At this time, the two semicircular sleeves 6 are firmly clamped on the photovoltaic cable 2 and will not fall off. Then push the combined extrusion sleeve 1 to the side wall of the center pile I-beam 3. Then, use radial extrusion equipment to press and form the combined extrusion sleeve 1. During the radial pressing process, the clamping keys 8 and the clamping key slots 9 are deformed, compressed, and anchored. Finally, remove the radial extrusion equipment. The radial extrusion equipment uses conventional or existing mature equipment.

[0040] Preferably, the clamping key 8 of the semicircular sleeve 6 is an arc-shaped plate structure, which can increase the contact area between the clamping key 8 and the clamping key groove 9, thereby improving the anchoring strength and making the two semicircular sleeves 6 better clamped on the photovoltaic cable 2.

[0041] There is a clearance fit between the pressing key 8 and the pressing key slot 9, so the pressing key 8 can be easily inserted into the pressing key slot 9.

[0042] When the number of the pressing keys 8 is greater than one, the size of the pressing key 8 close to the outer side of the semicircular sleeve 6 is larger than the size of the pressing key 8 far from the outer side of the semicircular sleeve 6 .

[0043] Preferably, the number of the pressing keys 8 is two, and correspondingly, the number of the pressing key slots 9 is two, and they correspond one to one with the pressing keys 8 .

[0044] The present invention changes the stress form of the photovoltaic component cables. During the cable net adjustment process, combined extrusion sleeves are made on both sides of the center pile I-steel for anchoring. This can solve the problem of large cable force loss caused by friction between the component cables and the center pile I-steel when tensioned on both sides due to the cables being too long, thereby ensuring the linear shape of the cable net.

[0045] 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 anchoring construction method, characterized in that: The combined extrusion sleeve (1) is anchored on both sides of at least one center pile I-beam (3) in the middle of or near the middle of the photovoltaic cable (2) by radial extrusion; The combined extrusion sleeve (1) comprises two semicircular sleeve bodies (6) of the same structure, the outer side of the semicircular sleeve body (6) is a semicircular arc structure, the inner side of the semicircular sleeve body (6) is provided with a semicircular groove (7), the semicircular sleeve body (6) on one side of the semicircular groove (7) is provided with at least one layer of pressing keys (8), and the semicircular sleeve body (6) on the other side of the semicircular groove (7) is provided with a pressing key groove (9) adapted to the pressing key (8), and when the two semicircular sleeve bodies (6) are combined, the pressing key (8) of one semicircular sleeve body (6) is inserted into the pressing key groove (9) of the other semicircular sleeve body (6); The specific process is as follows: Step 1. Determine the number and position of the center pile I-beams (3) to which the combined extrusion sleeve (1) needs to be anchored; Step 2. Anchoring the photovoltaic cable (2) with an integral extrusion sleeve (5) at the end pile I-beam (4) on one side; Step 3. Starting from the side close to the already anchored end pile I-beam (4), the combined extrusion sleeve (1) is anchored on both sides of the middle pile I-beam (3) determined in step 1 in sequence; Step 4. Anchor the photovoltaic cable (2) with an integral extrusion sleeve (5) at the end pile I-beam (4) on the other side; In step 3, when anchoring each center pile I-beam (3), the photovoltaic cable (2) is first stretched to a set value, and then the combined extrusion sleeve (1) is assembled and sleeved on the anchoring position of the photovoltaic cable (2), and then the combined extrusion sleeve (1) is pressed into shape by a radial extrusion device, and finally the radial extrusion device is removed.

2. The anchoring construction method of a photovoltaic cable according to claim 1, characterized in that: The pressing key (8) is an arc-shaped plate structure.

3. The anchoring construction method of a photovoltaic cable according to claim 1, characterized in that: There is a clearance fit between the pressing key (8) and the pressing key slot (9).

4. The anchoring construction method of a photovoltaic cable according to claim 1, characterized in that: When the number of the pressing keys (8) is greater than one, the size of the pressing key (8) close to the outside of the semicircular sleeve (6) is greater than the size of the pressing key (8) far from the outside of the semicircular sleeve (6).

5. A photovoltaic cable anchoring construction method according to any one of claims 2 to 4, characterized in that: The number of the clamping keys (8) is 2, and accordingly, the number of the clamping key slots (9) is 2, and they correspond one-to-one to the clamping keys (8).

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