Environment-friendly insect and ant prevention photovoltaic cable

Abstract

The utility model discloses an environment-friendly insect and ant prevention photovoltaic cable, which comprises a conductor, and an insulating layer, a lining layer and an outer sheath which are sequentially arranged along the conductor from inside to outside, the conductor is made of aluminum alloy material, the insulating layer is made of irradiation crosslinking low-smoke halogen-free flame-retardant polyolefin material, the lining layer is made of nylon material, and the outer sheath is made of polyethylene material. The outer sheath is made of an irradiation crosslinking low-smoke halogen-free flame-retardant polyolefin material, and the thickness of the lining layer is greater than or equal to 0.2 mm. The cable provided by the utility model has the advantages of ultraviolet irradiation resistance, strong ozone resistance, good flame retardation performance, good product flexibility, and better insect and ant prevention performance.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic cables, in particular to an environmentally friendly insect-proof and ant-proof photovoltaic cable. Background Art

[0002] Countries around the world are vigorously developing solar power generation systems. As the power transmission channel of solar power generation systems, photovoltaic cables need to be able to adapt to various environments. The insect and ant prevention method currently used by insect and ant-proof photovoltaic cables on the market is mainly chemical. The chemical insect and ant prevention method is to add chemical agents to the sheath material of the cable so that insects and ants are killed or repelled when they approach or bite the outer sheath of the cable. Currently, low-toxic repellents are mainly used. These materials rely on the stimulation of the olfactory and taste mucosa by smell or contact to achieve the purpose of insect and ant repellency. However, cables using chemical insect and ant prevention have the following disadvantages:

[0003] (1) The migration of chemicals contained in the cable outer sheath will cause environmental pollution;

[0004] (2) Due to the thermal effect of the cable, the anti-insect and ant medicine contained in the cable outer sheath ages and slowly releases, which reduces the anti-insect and ant performance of the cable. Therefore, the long-term effectiveness of the anti-insect and ant performance of the cable cannot be guaranteed;

[0005] (3) During the processing of the cable outer sheath, the harmful gases emitted by the insect and ant repellent drugs will cause health hazards to the producers. Utility Model Content

[0006] In view of the above problems, the utility model provides an environmentally friendly insect and ant-proof photovoltaic cable.

[0007] The technical solutions to the above technical problems are as follows:

[0008] An environmentally friendly insect-proof photovoltaic cable comprises a conductor and an insulating layer, an inner lining layer and an outer sheath which are arranged in sequence from the inside to the outside of the conductor. The conductor is made of an aluminum alloy material, the insulating layer is made of a radiation-cross-linked low-smoke halogen-free flame-retardant polyolefin material, the inner lining layer is made of a nylon 12 material, and the outer sheath is made of a radiation-cross-linked low-smoke halogen-free flame-retardant polyolefin material. The thickness of the inner lining layer is greater than or equal to 0.2 mm.

[0009] Furthermore, the outer sheath comprises an armor layer and a sheath layer, and the sheath layer is coated on the outside of the armor layer.

[0010] Furthermore, the armor layer is made of steel wire, and the sheath layer is made of radiation cross-linked low-smoke halogen-free flame-retardant polyolefin material.

[0011] Furthermore, the conductor is cylindrical, a filling layer is provided between the insulating layer and the conductor, and the filling layer and the plurality of conductors are wrapped by the insulating layer.

[0012] Furthermore, it also includes a cable connector for connecting to the end of a cable, the cable connector includes a first pressure ring, a second pressure ring, a connecting sleeve, an external pressure sleeve, and a threaded connecting sleeve, a plurality of clamping blocks are evenly distributed on the axial end face of the first pressure ring, a thread is provided on the circumferential surface of each clamping block, the clamping blocks are threadedly matched with the pressure sleeve, the connecting sleeve includes a sleeve body and a sleeve annular platform, the sleeve body and the sleeve annular platform form a first shoulder and a second shoulder, the first pressure ring is sleeved on the first shoulder, the second pressure ring is sleeved on the second shoulder, and the threaded connecting sleeve is connected to the second pressure ring.

[0013] Furthermore, the sleeve body is provided with an axial through hole, and a first locking assembly and a second locking assembly are provided in the axial through hole, the first locking assembly includes a first hollow shaft and a first locking arm, the first hollow shaft and the first locking arm are integrally formed, the first hollow shaft is interference fit with the axial through hole, the first locking arm cooperates with the first pressure ring, an annular protrusion is provided in the inner hole of the first hollow shaft, the second locking assembly includes a second countersunk shaft and a second locking arm, the second countersunk shaft is inserted into the inner hole of the first hollow shaft, and an annular groove is provided on the outer circumferential surface of the second countersunk shaft, the annular protrusion cooperates with the annular groove, a thread is also provided on the outer circumferential surface of the second countersunk shaft, the second locking arm cooperates with the second countersunk shaft thread, the second locking arm also cooperates with the second pressure ring, and a tool matching hole is provided at the bottom of the hole of the second countersunk shaft.

[0014] The environmentally friendly insect-proof photovoltaic cable provided by the utility model is not only resistant to ultraviolet radiation, strong in ozone resistance, and good in flame retardancy, but also has good product flexibility. At the same time, the cable provided by the utility model has good insect-proof effect and a wide range of applications. Compared with the photovoltaic cables in the prior art, it is more environmentally friendly and has better insect-proof performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the internal structure of the utility model environmentally friendly anti-insect and ant photovoltaic cable;

[0016] Figure 2 This is a schematic diagram of the application layout of the utility model environmentally friendly anti-insect and ant photovoltaic cable;

[0017] Figure 3 A cross-sectional view of a connector for connecting an environmentally friendly insect-proof ant photovoltaic cable;

[0018] Figure 4 It is a partial cross-sectional view of the cable connector;

[0019] Figure 5 3D view of the two cable glands when assembled.

[0020] Markings in the accompanying drawings: conductor 1, insulation layer 2, inner lining layer 3, outer sheath 4, armor layer 4-1, sheath layer 4-2, filling layer 5, first pressure ring 10, clamping block 10a, first matching groove 10b, second pressure ring 11, second matching groove 11b, annular boss 11-1, connecting sleeve 12, sleeve body 12a, sleeve annular platform 12b, first shoulder 12c, second shoulder 12d, outer pressure sleeve 13, threaded connecting sleeve 14, annular cavity 14-1, axial through hole 19, first hollow shaft 20, annular protrusion 20-1, first locking arm 21, second countersunk shaft 22, annular groove 22-1, second locking arm 23, tool matching hole 22-2. DETAILED DESCRIPTION

[0021] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0022] like Figure 1 As shown, the environmentally friendly insect-proof photovoltaic cable includes a conductor 1 and an insulating layer 2, an inner lining layer 3, and an outer sheath 4 arranged along the conductor 1 from the inside to the outside. The conductor 1 is made of aluminum alloy material, the insulating layer 2 is made of radiation cross-linked low-smoke halogen-free flame-retardant polyolefin material, the inner lining layer 3 is made of nylon 12 material, and the outer sheath 4 is made of radiation cross-linked low-smoke halogen-free flame-retardant polyolefin material. The thickness of the inner lining layer 3 is greater than or equal to 0.2 mm.

[0023] The outer sheath 4 includes an armor layer 4-1 and a sheath layer 4-2, and the sheath layer 4-2 is coated on the outside of the armor layer 4-1.

[0024] The armor layer 4-1 is made of steel wire, and the sheath layer 4-2 is made of radiation cross-linked low-smoke halogen-free flame-retardant polyolefin material.

[0025] The conductor 1 is cylindrical, and a filling layer 5 is provided between the insulating layer 2 and the conductor 1 . The filling layer 5 and the plurality of conductors 1 are wrapped by the insulating layer 2 .

[0026] Specifically, after adding potassium iodide stabilizer to the nylon 12 material, the long-term use temperature of the inner lining layer 3 can reach 90°C-125°C. The bond energies of CH, C=O, and CN bonds in the nylon 12 material are all greater than 410KJ / mol, and ultraviolet rays are not enough to destroy them. After adding appropriate anti-aging agents, the anti-ultraviolet performance of nylon 12 is very excellent, which makes the anti-ultraviolet performance of the inner lining layer 3 better. The hardness of the nylon 12 material is above 70D, and it has excellent insect and ant resistance, so that the inner lining layer 3 has sufficient insect and ant resistance, which makes the service life of the cable longer.

[0027] When preparing the inner lining layer 3, the raw material of the inner lining layer 3 (nylon 12) is uniformly extruded on the surface of the insulating layer 2 by an extruder, and the inner lining layer 3 is tightly wrapped around the outside of the insulating layer 2 by vacuuming; the inner lining layer 3 is extruded by a single-screw extruder, the equipment aspect ratio of the extruder is ≥25, the compression ratio of the screw is between 3.5:1-5:1, and a nylon-specific screw is preferred, and a BM screw can also be used for processing. Mould selection: a tube extrusion mould is used, and vacuum extrusion is used to effectively improve the tightness between the inner lining layer 3 and the coated conductor 1, and the stretching ratio is 3-6.

[0028] The use of steel wire in the armor layer 4-1 can improve the tightness of the internal wire core on the one hand, and further play a role in preventing rats and ants on the other hand.

[0029] like Figure 2 As shown, the environmentally friendly anti-insect ant photovoltaic cable is connected by a special cable connector. If the environmentally friendly anti-insect ant photovoltaic cable adopts the traditional copper-aluminum connecting pipe solution, it will need 12 connection points. Figures 3 to 5 The special connector of the structure only needs 4 connection points. The cable connector can realize the connection between aluminum or aluminum alloy conductor photovoltaic cable and copper conductor photovoltaic cable, and can also be used in a single aluminum or aluminum alloy conductor photovoltaic cable. The cable connector is more convenient to operate, which can improve the work efficiency of photovoltaic cable layout and make the application of aluminum or aluminum alloy conductor photovoltaic cable more extensive. At the same time, it also contributes to the replacement of copper conductor photovoltaic cable by aluminum or aluminum alloy conductor photovoltaic cable, reduces the construction cost of photovoltaic system, and reduces the connection points and labor costs.

[0030] Specifically, Figures 3 to 5 As shown, it also includes a cable connector for connecting to the end of a cable, the cable connector includes a first pressure ring 10, a second pressure ring 11, a connecting sleeve 12, an outer pressure sleeve 13, and a threaded connecting sleeve 14. A plurality of clamping blocks 10a are evenly distributed on the axial end face of the first pressure ring 10, and a thread is provided on the circumferential surface of each clamping block 10a. The clamping blocks 10a are threadedly matched with the pressure sleeve 13. The connecting sleeve 12 includes a sleeve body 12a and a sleeve annular platform 12b. The sleeve body 12a and the sleeve annular platform 12b form a first shoulder 12c and a second shoulder 12d. The first pressure ring 10 is sleeved on the first shoulder 12c, the second pressure ring 11 is sleeved on the second shoulder 12d, and the threaded connecting sleeve 14 is connected to the second pressure ring 11.

[0031] The sleeve body 12a is provided with an axial through hole 19, and a first locking assembly and a second locking assembly are provided in the axial through hole 19. The first locking assembly includes a first hollow shaft 20 and a first locking arm 21. The first hollow shaft 20 and the first locking arm 21 are integrally formed. The first hollow shaft 20 is interference fit with the axial through hole 19, and the first locking arm 21 cooperates with the first pressure ring 10. An annular protrusion 20-1 is provided in the inner hole of the first hollow shaft 20. The second locking assembly includes a second countersunk shaft 22 and a second locking arm 23. The second countersunk shaft 22 is inserted into the inner hole of the first hollow shaft 20, and an annular groove 22-1 is provided on the outer circumferential surface of the second countersunk shaft 22. The annular protrusion 20-1 cooperates with the annular groove 22-1. The outer circumferential surface of the second countersunk shaft 22 is also provided with a thread. The second locking arm 23 is threadedly matched with the second countersunk shaft 22. The second locking arm 23 also cooperates with the second pressure ring 11. A tool matching hole 22-2 is provided at the bottom of the hole of the second countersunk shaft 22.

[0032] The outer sheath 4 of the photovoltaic cable is in contact with the compression block 10a, and the conductor 1 of the photovoltaic cable passes through the first compression ring 10, the second compression ring 11, and the connecting sleeve 12, so that the two sections of the photovoltaic cable are connected. The outer compression sleeve 13 is conical, and the compression block 10a is also conical. When the outer compression sleeve 13 is tightened on the compression block 10a, the conical surface of the outer compression sleeve 13 will gradually compress the compression block 10a, so that the compression block 10a compresses the outer sheath 4 of the photovoltaic cable, so that the connection between the photovoltaic cable and the cable connector is more stable (specifically, as shown in FIG. Figure 3 shown).

[0033] An annular boss 11-1 is arranged on the circumferential surface of the second pressure ring 11, and an annular cavity 14-1 is arranged on the inner wall of the threaded connection sleeve 14. The annular boss 11-1 is inserted into the annular cavity 14-1 to improve the connection strength between the second pressure ring 11 and the threaded connection sleeve 14. The threaded connection sleeve 14 is set to be one large and one small, and threads are respectively arranged on the circumferential surface or the inner wall of the threaded connection sleeve 14, so that the two threaded connection sleeves 14 can be connected, thereby achieving the purpose of connecting two cable connectors.

[0034] A first matching groove 10b is also provided on the axial end surface of the first pressure ring 10, and a second matching groove 11b is also provided on the axial end surface of the second pressure ring 11. Figure 3As shown, when assembling the first pressing ring 10 and the second pressing ring 11, first put the first pressing ring 10 and the second pressing ring 11 on the first shoulder 12c and the second shoulder 12d respectively, and then use a tool to align the tool matching hole 22-2 of the second countersunk shaft 22 and turn the second countersunk shaft 22 to rotate. As the second countersunk shaft 22 rotates, the first locking arm 21 is inserted into the first matching groove 10b, and the second locking arm 23 is inserted into the second shoulder 12d. Continue to turn the second countersunk shaft 22. Since the second locking arm 23 is threadedly matched with the second countersunk shaft 22, the second locking arm 23 will apply axial clamping force to the second pressing ring 11. The second locking arm 23 cooperates with the first locking arm 21, so as to press the second pressing ring 11 and the first pressing ring 10 at both ends of the connecting sleeve 12 to improve the strength of the entire connector, improve the service life of the cable connector, and prevent the cable connector from loosening.

[0035] Finally, it should be noted that the above-described implementation mode is only a preferred embodiment of the utility model to illustrate the technical solution of the utility model, and does not limit it, let alone limit the protection scope of the utility model; although the utility model is described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the protection scope of the claims.

Claims

1. Environmentally friendly anti-insect and anti-ant photovoltaic cable, characterized in that: The invention comprises a conductor (1), and an insulating layer (2), an inner lining layer (3), and an outer sheath (4) which are arranged in sequence from the inside to the outside of the conductor (1), wherein the conductor (1) is made of an aluminum alloy material, the insulating layer (2) is made of a radiation cross-linked low-smoke halogen-free flame-retardant polyolefin material, the inner lining layer (3) is made of a nylon 12 material, and the outer sheath (4) is made of a radiation cross-linked low-smoke halogen-free flame-retardant polyolefin material, and the thickness of the inner lining layer (3) is greater than or equal to 0.2 mm; The outer sheath (4) comprises an armor layer (4-1) and a sheath layer (4-2), wherein the sheath layer (4-2) is coated on the outside of the armor layer (4-1).

2. The environmentally friendly insect-proof photovoltaic cable according to claim 1, characterized in that: The armor layer (4-1) is made of steel wire, and the sheath layer (4-2) is made of radiation cross-linked low-smoke halogen-free flame-retardant polyolefin material.

3. The environmentally friendly insect-proof photovoltaic cable according to claim 1, characterized in that: The conductor (1) is cylindrical, a filling layer (5) is provided between the insulating layer (2) and the conductor (1), and the filling layer (5) and the plurality of conductors (1) are wrapped by the insulating layer (2).

4. The environmentally friendly insect-proof photovoltaic cable according to claim 1, characterized in that: The invention also comprises a cable connector for connecting with the end of a cable, the cable connector comprising a first pressure ring (10), a second pressure ring (11), a connecting sleeve (12), an outer pressure sleeve (13), and a threaded connecting sleeve (14); a plurality of clamping blocks (10a) are evenly distributed on the axial end surface of the first pressure ring (10); a thread is provided on the circumferential surface of each clamping block (10a); the clamping blocks (10a) and the pressure sleeve (13) are threadedly matched; the connecting sleeve (12) comprises a sleeve body (12a) and a sleeve annular platform (12b); the sleeve body (12a) and the sleeve annular platform (12b) form a first shoulder (12c) and a second shoulder (12d); the first pressure ring (10) is sleeved on the first shoulder (12c); the second pressure ring (11) is sleeved on the second shoulder (12d); and the threaded connecting sleeve (14) is connected to the second pressure ring (11).

5. The environmentally friendly insect-proof photovoltaic cable according to claim 4, characterized in that: The sleeve body (12a) is provided with an axial through hole (19), and a first locking assembly and a second locking assembly are provided in the axial through hole (19), wherein the first locking assembly comprises a first hollow shaft (20) and a first locking arm (21), wherein the first hollow shaft (20) and the first locking arm (21) are integrally formed, the first hollow shaft (20) and the axial through hole (19) are interference fit, the first locking arm (21) and the first pressure ring (10) are fitted, an annular protrusion (20-1) is provided in the inner hole of the first hollow shaft (20), and the second locking assembly comprises a second countersunk shaft (22 ), a second locking arm (23), the second countersunk shaft (22) is inserted into the inner hole of the first hollow shaft (20), and an annular groove (22-1) is provided on the outer circumference of the second countersunk shaft (22), the annular protrusion (20-1) cooperates with the annular groove (22-1), a thread is also provided on the outer circumference of the second countersunk shaft (22), the second locking arm (23) cooperates with the thread of the second countersunk shaft (22), the second locking arm (23) also cooperates with the second pressure ring (11), and a tool matching hole (22-2) is provided at the bottom of the hole of the second countersunk shaft (22).

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