Anti-oxidation insulation type aluminum alloy photovoltaic cable

Abstract

The invention provides an anti-oxidation insulation type aluminum alloy photovoltaic cable, and belongs to the technical field of cables.The anti-oxidation insulation type aluminum alloy photovoltaic cable comprises a conductor, an insulation layer, a filling layer, a belting layer, an outer protection layer and an isolation layer.The anti-oxidation insulation type aluminum alloy photovoltaic cable has the advantages that by arranging an extrusion part and a sealing cavity, in the use process of the cable, the cable is not prone to damage, and the service life of the cable is prolonged; if cracks are generated due to oxidation corrosion, the adjusting bins at the corresponding positions can communicate with the outside, gas can circulate to the outside, the pressure intensity in the gas storage chambers can push the corresponding extrusion pieces to move towards the adjusting bins, the two corresponding sealing cavities can be made to be close to and make contact with each other, an isolation belt is formed, and the bottoms of the extrusion pieces are supported; according to the cable, the extrusion part can be in contact with the inner side of the adjusting bin, the adjusting bin with oxidation cracks can be blocked, isolation from external gas is achieved, the external gas can be effectively prevented from entering the cable, oxidation corrosion of the external gas to a conductor, an insulating layer and a belting layer is prevented, and the service life of the cable is prolonged.

Description

Technical Field

[0001] The invention belongs to the technical field of cables, and in particular relates to an anti-oxidation insulating aluminum alloy photovoltaic cable. Background Art

[0002] Aluminum alloy photovoltaic cable is a kind of photovoltaic cable that is resistant to high and low temperatures and has a long service life. It is specially used as a lead wire for connecting photovoltaic modules and distribution boxes in photovoltaic power generation systems. Aluminum alloy photovoltaic cable is made of materials such as cable core, insulation layer and sheath layer.

[0003] Existing photovoltaic cables are usually set up in the outside world. After long-term use, the outer sheath of the cable will be oxidized due to the influence of humidity, high temperature and other environments. When the outer sheath of the cable is corroded by oxidation, the external gas will further cause oxidation corrosion to the inner layer of the cable. If the external gas enters the cable and contacts the insulating layer, the insulating material of the cable will be oxidized and aged, causing its thermal stability and antioxidant ability to decrease, accelerating the degradation of the insulating material and increasing the risk of electrical failure. If the external gas enters the cable and contacts the conductor, it will oxidize the conductor inside the cable, forming an oxide layer on the surface of the conductor, increasing the resistivity of the cable, thereby reducing the current transmission efficiency, and deteriorating the conductive performance of the cable, affecting the normal operation of the cable. In summary, external gas will enter the cable and affect the service life of the cable, and after the outer sheath of the cable is corroded by oxidation, cracks will appear on the surface of the outer sheath. At this time, if the cable bends during use or the cable expands internally due to thermal expansion, the force of the cable deformation will directly act on the crack. If this continues for a long time, the degree of crack at this position will increase, affecting its use.

[0004] Therefore, in order to solve the above problems, it is necessary to provide an oxidation-resistant insulating aluminum alloy photovoltaic cable. Summary of the invention

[0005] The purpose of the present invention is to provide an oxidation-resistant insulating aluminum alloy photovoltaic cable, which aims to solve the problem that the outer sheath of the existing cable will be oxidized when it is used for a long time in the outside world and is affected by the environment of humidity, high temperature and the like. When the outer sheath of the cable is oxidized and corroded, the external gas will further cause oxidation corrosion to the inner layer of the cable, affecting the service life of the cable. After the outer sheath of the cable is oxidized and corroded, cracks will appear on the surface of the outer sheath. At this time, if the cable is bent or the cable expands thermally during use, the force of the cable deformation will directly act on the crack, which will increase the degree of the crack at that position and affect the use.

[0006] To achieve the above object, the present invention provides the following technical solutions: An anti-oxidation insulation type aluminum alloy photovoltaic cable, comprising a conductor, an insulating layer, a filling layer, a tape layer and an outer sheath, and also comprising; An isolation layer, wherein the isolation layer is provided with multiple groups and is equidistantly distributed between the tape layer and the outer sheath along the length direction of the cable, the isolation layer comprises an isolation ring, the inner side of the isolation ring is fixedly connected to a plurality of equidistantly distributed flame retardant cavities, the outer wall of the isolation ring is provided with accommodating cavities having the same number and corresponding positions as the flame retardant cavities, the outer side of the isolation ring is fixedly connected with regulating chambers having the same number and corresponding positions as the accommodating cavities, each of the accommodating cavities is connected to two symmetrically arranged sealing cavities, and an extrusion piece is connected between every two of the sealing cavities.

[0007] Preferably, the two sealed cavities inside each of the accommodating cavities are connected to the interior of the corresponding flame retardant cavity, and each of the flame retardant cavity and the interior of the two connected sealed cavities are filled with inert expansion gas, and the inner side of each of the flame retardant cavity is connected to the outer wall of the wrapping layer.

[0008] Preferably, the side of each adjustment bin away from the isolation ring is fixedly connected to the inner side of the outer protective layer, the side of each adjustment bin close to the isolation ring is connected to the interior of the corresponding accommodating cavity, and each extrusion member can enter the interior of the corresponding adjustment bin.

[0009] Preferably, an extrusion groove is formed at the bottom of each of the extrusion members.

[0010] Preferably, the interior of each regulating chamber is filled with gas, and the gas pressure can extrude the corresponding extrusion component, so that the bottom of the extrusion component can be in close contact with the inner wall of the accommodating chamber, a gas storage chamber can be formed between the extrusion groove and the inner wall of the accommodating chamber, the extrusion component can be located between the corresponding two sealed chambers, and the corresponding two sealed chambers can be in a compressed state.

[0011] Preferably, the interior of each of the gas storage chambers is filled with gas, and the gas pressure is lower than the gas pressure inside the corresponding regulating chamber.

[0012] Preferably, when the side of the regulating chamber away from the isolation ring is connected to the outside world, the gas inside the regulating chamber will flow to the outside world, and the pressure inside the regulating chamber will be lower than the pressure inside the corresponding air storage chamber. The pressure inside the air storage chamber can push the corresponding extrusion member to move toward the regulating chamber, so that the opposite sides of the corresponding two sealed cavities can approach each other and contact and support the bottom of the corresponding extrusion member.

[0013] Preferably, each of the extrusion parts is provided with a connecting groove connected with the corresponding extrusion groove on one side close to the corresponding two sealing cavities, and a limiting groove is provided inside each of the connecting grooves, and a sealing plate is slidably connected inside each of the limiting grooves, and a guide groove is provided inside each of the limiting grooves.

[0014] Preferably, when the extrusion piece is located between the corresponding two sealing chambers, the guide groove and the connecting groove on the same side can be blocked by the corresponding sealing chamber; when the extrusion piece is located inside the corresponding regulating chamber, the extrusion piece can divide the inside of the regulating chamber into a first regulating chamber and a second regulating chamber, and the two guide grooves on the same extrusion piece are respectively connected to the corresponding first regulating chamber and the second regulating chamber.

[0015] Preferably, when the extrusion member moves toward the direction of the regulating chamber and the opposite sides of the corresponding two sealed chambers approach each other, the two sealed chambers can squeeze the gas between the two sealed chambers, so that the gas can enter the interior of the corresponding extrusion groove and respectively enter the interiors of the corresponding two connecting grooves, pushing the sealing plate inside the corresponding limit groove to move in the direction away from the extrusion groove, so that the corresponding limit groove can be connected with the guide groove, and the gas can enter the interiors of the corresponding first regulating chamber and the second regulating chamber.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention provides an extrusion piece and a sealing cavity. When the cable is used, if oxidation corrosion occurs and cracks are generated, the corresponding regulating chamber in the isolation layer at the corresponding position will be connected to the outside world, and the gas will flow to the outside world. The pressure inside the regulating chamber will be lower than the pressure inside the corresponding gas storage chamber. The gas pressure inside the gas storage chamber can push the corresponding extrusion piece to move toward the regulating chamber, so that the two corresponding sealing chambers can be brought into close contact to form an isolation zone, and the bottom of the extrusion piece can be supported. The extrusion piece can be in contact with the inner side of the regulating chamber, and the regulating chamber with oxidation cracks can be blocked to achieve isolation from external gas, which can effectively prevent external gas from entering the interior of the cable, prevent external gas from oxidizing and corroding the conductor, insulation layer, and tape layer, and improve the service life of the cable.

[0017] 2. The present invention provides a guide groove and a connecting groove. When the cable is used for a long time and cracks are generated due to oxidation corrosion, the corresponding regulating chamber will be connected to the outside world, and the gas will flow to the outside world. The pressure inside the gas storage chamber can push the corresponding extrusion member to move toward the regulating chamber, so that the corresponding two sealed chambers can be close to each other and contact and support with the bottom of the extrusion member. During this process, the two sealed chambers can squeeze the gas between the two sealed chambers, so that the gas can enter the corresponding first regulating chamber and the second regulating chamber. Through the change of the air pressure inside the first regulating chamber and the second regulating chamber, the position of the extrusion member can be adjusted to ensure that the extrusion member can effectively block the cracks in the regulating chamber, avoid the phenomenon of being unable to block, and improve the isolation effect of external gas.

[0018] 3. The present invention provides a flame retardant cavity and a sealing cavity. When the cable is used, if oxidation corrosion occurs to produce cracks, the corresponding adjusting chamber will be connected to the outside world, and the gas will flow to the outside world, so that the corresponding extrusion piece can be moved toward the adjusting chamber, and the corresponding two sealing chambers can be brought into close contact and contact with the bottom of the extrusion piece for support. If the cable crack position bends or the cable expands thermally at this time, the cable deformation force will act on the flame retardant cavity and the sealing cavity at the corresponding position, which can be buffered by the flame retardant cavity and the sealing cavity to avoid the deformation force acting directly on the crack of the cable, thereby preventing the crack from increasing and improving the service life of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a schematic diagram of the structure of the cable of the present invention.

[0020] Figure 2 This is a structural distribution diagram of the tape layer and the outer protective layer of the present invention.

[0021] Figure 3 This is a structural distribution diagram of the isolation layer of the present invention.

[0022] Figure 4 It is a schematic diagram of the overall structure of the isolation layer of the present invention.

[0023] Figure 5 Schematic diagram of the internal structure of the isolation layer of the present invention.

[0024] Figure 6 It is a schematic structural diagram of the isolation ring of the present invention.

[0025] Figure 7 It is a schematic diagram of the structure of the regulating chamber and the accommodating chamber of the present invention.

[0026] Figure 8 It is a schematic diagram of the structure of the first regulating chamber and the second regulating chamber of the present invention.

[0027] Fig. 9 It is a schematic diagram of the structure of the extrusion part of the present invention.

[0028] Fig.10 It is a structural schematic diagram of the sealing plate of the present invention.

[0029] In the figure: 1. conductor; 2. insulating layer; 3. filling layer; 4. wrapping layer; 5. outer protective layer; 6. isolation layer; 61. isolation ring; 62. flame retardant cavity; 63. accommodating cavity; 64. adjusting chamber; 65. sealing cavity; 66. extrusion piece; 67. extrusion groove; 68. air storage chamber; 69. connecting groove; 610. limiting groove; 611. blocking plate; 612. guide groove; 613. first adjusting cavity; 614. second adjusting cavity. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Embodiment 1 Existing photovoltaic cables are usually set up in the outdoors and are used for a long time. Under the influence of humidity, high temperature and other environments, the outer sheath of the cable will oxidize. When the outer sheath of the cable is corroded by oxidation, the external gas will further cause oxidation corrosion to the inner layer of the cable. If the external gas enters the interior of the cable and contacts the insulating layer, it will oxidize and age the insulating material of the cable for a long time, causing its thermal stability and antioxidant ability to decrease, which will accelerate the degradation of the insulating material and increase the risk of electrical failure. If the external gas enters the interior of the cable and contacts the conductor, it will oxidize the conductor inside the cable for a long time, forming an oxide layer on the surface of the conductor, which will increase the resistivity of the cable, thereby reducing the current transmission efficiency and deteriorating the conductive performance of the cable. If the external gas enters the interior of the cable and contacts the tape layer, it will corrode and age the tape layer for a long time, affecting the binding effect of the tape layer on the cable. In summary, external gas entering the interior of the cable will affect the service life of the cable.

[0032] See also Figures 1 to 8 , the present invention provides the following technical solutions: an anti-oxidation insulating aluminum alloy photovoltaic cable, comprising a conductor 1, an insulating layer 2, a filling layer 3, a tape layer 4 and an outer sheath 5, and also comprising; like Figure 3 As shown, the isolation layer 6 is provided with multiple groups of isolation layers 6 and is evenly distributed between the tape layer 4 and the outer sheath 5 along the length direction of the cable. The isolation layer 6 includes an isolation ring 61. The inner side of the isolation ring 61 is fixedly connected to multiple evenly distributed flame retardant cavities 62. The outer wall of the isolation ring 61 is provided with accommodating cavities 63 with the same number and corresponding positions as the flame retardant cavities 62. The outer side of the isolation ring 61 is fixedly connected with adjusting chambers 64 with the same number and corresponding positions as the accommodating cavities 63. Each accommodating cavity 63 is internally connected to two symmetrically arranged sealing cavities 65, and an extrusion piece 66 is connected between every two sealing cavities 65.

[0033] The opposite sides of the two sealing cavities 65 in the same accommodating cavity 63 are both fixedly connected to the inner wall of the corresponding accommodating cavity 63 .

[0034] The two sealed cavities 65 inside each accommodating cavity 63 are connected to the interior of the corresponding flame retardant cavity 62, and the interior of each flame retardant cavity 62 and the two connected sealed cavities 65 are filled with inert expansion gas, and the inner side of each flame retardant cavity 62 is connected to the outer wall of the wrapping layer 4.

[0035] The inert expansion gas can be helium, neon, argon, krypton or xenon. You can choose according to your needs. The inert expansion gas is an existing technology and will not be described in detail.

[0036] The side of each adjustment chamber 64 away from the isolation ring 61 is fixedly connected to the inner side of the outer protective layer 5, the side of each adjustment chamber 64 close to the isolation ring 61 is connected to the interior of the corresponding accommodating cavity 63, and each extrusion piece 66 can enter the interior of the corresponding adjustment chamber 64.

[0037] The extrusion piece 66 located between the two sealed cavities 65 can squeeze the two sealed cavities 65, so that the two sealed cavities 65 are in a compressed state, and can squeeze the inert expansion gas inside the two sealed cavities 65, so that the inert expansion gas can enter the interior of the flame retardant cavity 62, so that the flame retardant cavity 62 is closely contacted and squeezed with the sheath layer 4, further improving the cable laying effect of the sheath layer 4, avoiding cable displacement or deformation during use, ensuring the stability and integrity of the cable, and at the same time increasing the pressure inside the flame retardant cavity 62. When the cable is overloaded for a long time, the conductor 1 inside the cable will heat up, which may cause aging of the wire insulation material and cause a fire. At this time, the flame generated inside the cable can burn the flame retardant cavity 62, and the inert expansion gas inside the flame retardant cavity 62 can enter the interior of the cable, and the flame can be extinguished by the inert expansion gas to perform flame retardancy. Since the extrusion piece 66 squeezes the sealed cavity 65 to enhance the pressure inside the flame retardant cavity 62, the speed of releasing the inert expansion gas inside the flame retardant cavity 62 can be increased, the efficiency of fire extinguishing can be accelerated, and the flame retardant effect can be improved.

[0038] An extrusion groove 67 is formed at the bottom of each extrusion member 66 .

[0039] The interior of each regulating chamber 64 is filled with gas, and the gas pressure can squeeze the corresponding extrusion member 66, so that the bottom of the extrusion member 66 can be in close contact with the inner wall of the accommodating chamber 63, and a gas storage chamber 68 can be formed between the extrusion groove 67 and the inner wall of the accommodating chamber 63. The extrusion member 66 can be located between the corresponding two sealed chambers 65, and the corresponding two sealed chambers 65 can be in a compressed state.

[0040] The interior of each gas storage chamber 68 is filled with gas, and the gas pressure is lower than the gas pressure inside the corresponding regulating chamber 64 .

[0041] The gas storage chamber 68 and the regulating chamber 64 are both filled with gas, and during the manufacturing process, the regulating chamber 64 needs to be filled with gas first, in order to ensure that the extrusion component 66 can be preferentially located between the two sealed chambers 65. Since the two sealed chambers 65 are connected through the corresponding flame-retardant chambers 62, gas exchange can be achieved, and the position of the extrusion component 66 between the two sealed chambers 65 can be automatically adjusted by the pressure of the sealed chamber 65.

[0042] When the side of the regulating chamber 64 away from the isolation ring 61 is connected to the outside world, the gas inside the regulating chamber 64 will flow to the outside world, and the pressure inside the regulating chamber 64 will be lower than the pressure inside the corresponding gas storage chamber 68. The pressure inside the gas storage chamber 68 can push the corresponding extrusion member 66 to move toward the regulating chamber 64, so that the opposite sides of the corresponding two sealing chambers 65 can approach each other and contact and support the bottom of the corresponding extrusion member 66.

[0043] The gas pressure inside the air storage chamber 68 is lower than the gas pressure inside the corresponding regulating chamber 64 and is higher than the atmospheric pressure. This is to ensure that when the regulating chamber 64 is connected to the outside world after being oxidized and corroded, the pressure inside the air storage chamber 68 can push the corresponding extrusion member 66 to move toward the regulating chamber 64.

[0044] Under normal conditions, that is, when the cable is not oxidized and corroded, the gas pressure inside the regulating chamber 64 is greater than the gas pressure inside the gas storage chamber 68, and the extrusion piece 66 is located between the corresponding two sealed cavities 65, and the corresponding two sealed cavities 65 are both in a compressed state.

[0045] It should be noted that, since the regulating chamber 64 is connected to the outer sheath 5, if oxidation corrosion occurs and cracks are generated during the long-term use of the cable, the corresponding regulating chamber 64 in the isolation layer 6 at the corresponding position will be connected to the outside world, and the gas inside the regulating chamber 64 will flow to the outside world. The pressure inside the regulating chamber 64 will be lower than the pressure inside the corresponding gas storage chamber 68. The pressure inside the gas storage chamber 68 can push the corresponding extrusion piece 66 to move toward the regulating chamber 64, so that the opposite sides of the corresponding two sealed chambers 65 can be close to each other and can form an isolation through the two sealed chambers 65. The tape is provided, and after the two sealing cavities 65 are in contact on opposite sides, the tops of the two sealing cavities 65 can contact the bottoms of the corresponding extrusion pieces 66, and the extrusion pieces 66 can be supported, so that the side of the extrusion pieces 66 away from the sealing cavity 65 can contact the inner side of the regulating chamber 64, and the regulating chamber 64 with oxidation cracks can be sealed to achieve isolation from external gases. Thus, through the isolation and sealing of the sealing cavity 65 and the extrusion piece 66, it is possible to effectively prevent external gases from entering the interior of the cable, prevent external gases from oxidizing and corroding the conductor 1, the insulating layer 2, and the tape layer 4, and improve the service life.

[0046] When the extrusion piece 66 contacts the inner layer of the regulating chamber 64, and the tops of the corresponding two sealed cavities 65 contact the bottoms of the extrusion piece 66 for support, the conductor 1 of the cable will heat up when the cable is used for a long time, and the inert expanding gas inside the flame retardant chamber 62 will expand due to the heat, which will increase the gas pressure inside the corresponding two sealed cavities 65. This will not only further bring the two sealed cavities 65 into close contact and improve the isolation effect, but also enhance the supporting strength of the sealed cavity 65 to the extrusion piece 66, and improve the sealing effect on the regulating chamber 64. In this way, the isolation effect against external gas can be further improved during the use of the cable.

[0047] The present invention arranges the extrusion piece 66 and the sealing cavity 65. When the cable is used, if oxidation corrosion occurs and cracks are generated, the corresponding regulating chamber 64 in the isolation layer 6 at the corresponding position will be connected with the outside world, and the gas will flow to the outside world. The pressure inside the regulating chamber 64 will be lower than the pressure inside the corresponding gas storage chamber 68. The gas pressure inside the gas storage chamber 68 can push the corresponding extrusion piece 66 to move toward the regulating chamber 64, so that the two corresponding sealing chambers 65 can be close to each other to form an isolation zone, and the bottom of the extrusion piece 66 can be supported, so that the extrusion piece 66 can contact the inner side of the regulating chamber 64, and the regulating chamber 64 with oxidation cracks can be blocked to achieve isolation from external gas, which can effectively prevent external gas from entering the interior of the cable, prevent external gas from oxidizing and corroding the conductor 1, the insulating layer 2, and the tape layer 4, and improve the service life of the cable.

[0048] Embodiment 2 On the basis of the above-mentioned embodiment, during the use of the cable, if oxidation corrosion occurs and cracks are generated, the regulating chamber 64 at the corresponding position will be connected to the outside world. Although the cracks can be sealed by the contact between the extrusion piece 66 and the inner side of the regulating chamber 64, if the extrusion piece 66 does not correspond to the position of the crack, the extrusion piece 66 will not be able to directly and effectively seal the cracks in the regulating chamber 64, resulting in a phenomenon of being unable to be sealed, which affects the isolation of external gases.

[0049] See also Figures 5 to 10 A connecting groove 69 connected to the corresponding extrusion groove 67 is provided on one side of each extrusion member 66 close to the corresponding two sealing cavities 65, and a limiting groove 610 is provided inside each connecting groove 69, and a sealing plate 611 is slidably connected inside each limiting groove 610, and a guide groove 612 is provided inside each limiting groove 610.

[0050] When the extrusion piece 66 is located between the corresponding two sealing chambers 65, the guide groove 612 and the connecting groove 69 on the same side can be blocked by the corresponding sealing chamber 65. When the extrusion piece 66 is located inside the corresponding regulating chamber 64, the extrusion piece 66 can divide the inside of the regulating chamber 64 into a first regulating chamber 613 and a second regulating chamber 614, and the two guide grooves 612 on the same extrusion piece 66 are respectively connected to the corresponding first regulating chamber 613 and the second regulating chamber 614.

[0051] Under normal conditions, that is, when the cable is not oxidized and corroded, the extrusion piece 66 is located between the corresponding two sealing chambers 65. At this time, the sealing chamber 65 can be in close contact with the extrusion piece 66 through the internal gas pressure, and can effectively fit tightly with the outer side of the extrusion piece 66, so as to block the guide groove 612 and the connecting groove 69, and avoid leakage of gas inside the gas storage chamber 68.

[0052] When the extrusion piece 66 moves toward the regulating chamber 64 and the opposite sides of the corresponding two sealed chambers 65 approach each other, the two sealed chambers 65 can squeeze the gas between the two sealed chambers 65, allowing the gas to enter the interior of the corresponding extrusion groove 67 and respectively enter the interiors of the corresponding two connecting grooves 69, pushing the sealing plate 611 inside the corresponding limiting groove 610 to move in the direction away from the extrusion groove 67, allowing the corresponding limiting groove 610 to communicate with the guide groove 612, and allowing the gas to enter the interiors of the corresponding first regulating chamber 613 and the second regulating chamber 614.

[0053] like Fig.10 As shown, each blocking plate 611 can move left and right inside the corresponding limiting groove 610. When the blocking plate 611 moves to the inner wall of the limiting groove 610 close to the extrusion groove 67, the connecting groove 69 can be blocked, and the internal gas of the extrusion groove 67 cannot enter the corresponding connecting groove 69, so that the corresponding guide groove 612 cannot be connected with the extrusion groove 67 through the corresponding connecting groove 69. When the blocking plate 611 moves to the inner wall of the limiting groove 610 away from the extrusion groove 67, the corresponding guide groove 612 can be connected with the extrusion groove 67 through the corresponding connecting groove 69.

[0054] It should be noted that, during the long-term use of the cable, if the outer sheath 5 is partially oxidized and corroded to produce cracks, the corresponding regulating chamber 64 in the isolation layer 6 at the corresponding position will be connected to the outside world, and the gas will flow to the outside world. The pressure inside the regulating chamber 64 will be lower than the pressure inside the corresponding gas storage chamber 68. The pressure inside the gas storage chamber 68 can push the corresponding extrusion piece 66 to move toward the regulating chamber 64, so that the corresponding two sealed chambers 65 can be close to each other and contact and support the bottom of the extrusion piece 66. In this process, the two sealed chambers 65 can squeeze the gas between the two sealed chambers 65, that is, the gas inside the original gas storage chamber 68, so that the gas can enter the extrusion groove 67 of the extrusion piece 66 located at the top of the sealed chamber 65, so that the gas can enter The gas enters the interior of the two corresponding connecting grooves 69, which can push the sealing plate 611 inside the corresponding limiting groove 610 to move in the direction away from the extrusion groove 67, so that the corresponding limiting groove 610 can be connected with the guide groove 612, and the gas can enter the corresponding first regulating chamber 613 and the second regulating chamber 614. If the crack is located on the right side of the isolation layer 6, that is, above the first regulating chamber 613, the gas entering the first regulating chamber 613 will be discharged to the outside through the crack, and the gas entering the second regulating chamber 614 will increase the pressure inside the second regulating chamber 614 and make it greater than the atmospheric pressure. When the pressure inside the second regulating chamber 614 is greater than the pressure inside the extrusion groove 67, the gas pressure inside the second regulating chamber 614 is The strong energy can push the sealing plate 611 inside the corresponding limiting groove 610 to move toward the direction close to the extrusion groove 67, and can block the connecting groove 69. At this time, since the first regulating chamber 613 is connected with the outside world, the pressure of the first regulating chamber 613 is less than the gas pressure inside the second regulating chamber 614. The gas pressure inside the second regulating chamber 614 can push the extrusion piece 66 to move at the top of the sealing chamber 65 toward the direction of the first regulating chamber 613 until it moves to the bottom of the crack. If the position of the crack is on the left side of the isolation layer 6, that is, above the second regulating chamber 614, the gas entering the second regulating chamber 614 will be discharged to the outside world through the crack, and the gas entering the first regulating chamber 613 will increase the pressure inside the first regulating chamber 613 and Make it greater than the atmospheric pressure. When the pressure inside the first regulating chamber 613 is greater than the pressure inside the extrusion groove 67, the gas pressure inside the first regulating chamber 613 can push the sealing plate 611 inside the corresponding limiting groove 610 to move toward the direction close to the extrusion groove 67, and can block the connecting groove 69. At this time, since the second regulating chamber 614 is connected to the outside world, the pressure of the second regulating chamber 614 is less than the gas pressure inside the first regulating chamber 613. The gas pressure inside the first regulating chamber 613 can push the extrusion member 66 to move at the top of the sealing chamber 65 toward the direction of the second regulating chamber 614 until it moves to the bottom of the crack. Therefore, the position of the extrusion member 66 can be adjusted by changing the air pressure inside the first regulating chamber 613 and the second regulating chamber 614.Ensure that the extrusion piece 66 can effectively seal the cracks of the regulating chamber 64, avoid the phenomenon of being unable to seal, and improve the isolation effect of external gas.

[0055] The present invention arranges the guide groove 612 and the connecting groove 69. When the cable is used, if oxidation corrosion occurs and cracks are generated, the corresponding regulating chamber 64 will be connected to the outside world, and the gas will flow to the outside world. The pressure inside the regulating chamber 64 will be lower than the pressure inside the corresponding gas storage chamber 68. The pressure inside the gas storage chamber 68 can push the corresponding extrusion member 66 to move toward the regulating chamber 64, so that the corresponding two sealed chambers 65 can be close to each other and contact and support the bottom of the extrusion member 66. During this process, the two sealed chambers 65 can squeeze the gas between the two sealed chambers 65, so that the gas can enter the corresponding first regulating chamber 613 and the second regulating chamber 614. Through the change of the air pressure inside the first regulating chamber 613 and the second regulating chamber 614, the position of the extrusion member 66 can be adjusted to ensure that the extrusion member 66 can effectively block the cracks in the regulating chamber 64, avoid the phenomenon of being unable to block, and improve the isolation effect of external gas.

[0056] Embodiment 3 On the basis of the above-mentioned embodiment, after the outer sheath 5 of the cable is partially subjected to oxidation corrosion, cracks appear on the surface of the outer sheath 5. At this time, if the position of the crack on the surface of the outer sheath 5 bends during the use of the cable or the cable expands internally after long-term use, the force of the cable deformation will directly act on the crack. If this continues for a long time, the degree of crack at this position will increase, affecting the service life.

[0057] See also Figures 5 to 8 The inner side of the isolation ring 61 is fixedly connected to a plurality of flame retardant cavities 62 that are evenly distributed, and the interior of each accommodating cavity 63 is connected to two symmetrically arranged sealing cavities 65.

[0058] It should be noted that during the long-term use of the cable, if the outer sheath 5 partially oxidizes and corrodes to produce cracks, the corresponding adjusting chamber 64 in the isolation layer 6 at the corresponding position will be connected to the outside world, and the gas will flow to the outside world. The pressure inside the adjusting chamber 64 will be lower than the pressure inside the corresponding gas storage chamber 68. The pressure inside the gas storage chamber 68 can push the corresponding extrusion member 66 to move toward the adjusting chamber 64, and can make the corresponding two sealed cavities 65 close to each other and contact with the bottom of the extrusion member 66 for support. If the cable crack position bends or the cable expands due to heat at this time, the cable deformation force will act on the flame retardant cavity 62 and the sealing cavity 65 at the corresponding position, which can be buffered by the flame retardant cavity 62 and the sealing cavity 65 to avoid the deformation force acting directly on the crack of the cable, thereby preventing the crack from increasing and improving the service life of the cable.

[0059] The present invention provides a flame retardant cavity 62 and a sealing cavity 65. When the cable is used, if oxidation corrosion occurs to produce cracks, the corresponding regulating chamber 64 in the isolation layer 6 at the corresponding position will be connected to the outside world, and the gas will flow to the outside world, so that the corresponding extrusion piece 66 can move toward the direction of the regulating chamber 64, and the corresponding two sealing cavities 65 can be brought into close contact and contact with the bottom of the extrusion piece 66 for support. If the position of the cable crack bends or the cable expands due to heat at this time, the deformation force of the cable will act on the flame retardant cavity 62 and the sealing cavity 65 at the corresponding position, which can be buffered by the flame retardant cavity 62 and the sealing cavity 65 to avoid the deformation force acting directly on the crack of the cable, thereby preventing the crack from increasing and improving the service life of the cable.

[0060] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An anti-oxidation insulating aluminum alloy photovoltaic cable, comprising a conductor (1), an insulating layer (2), a filling layer (3), a tape layer (4) and an outer sheath (5), characterized in that: Also includes; An isolation layer (6), wherein the isolation layer (6) is provided with a plurality of groups and is equidistantly distributed between the tape layer (4) and the outer sheath (5) along the length direction of the cable, the isolation layer (6) comprises an isolation ring (61), the inner side of the isolation ring (61) is fixedly connected to a plurality of equidistantly distributed flame retardant cavities (62), the outer wall of the isolation ring (61) is provided with accommodating cavities (63) of the same number and corresponding positions as the flame retardant cavities (62), the outer side of the isolation ring (61) is fixedly connected to regulating chambers (64) of the same number and corresponding positions as the accommodating cavities (63), each of the accommodating cavities (63) is internally connected to two symmetrically arranged sealing cavities (65), and an extrusion piece (66) is connected between each two of the sealing cavities (65).

2. The oxidation-resistant insulated aluminum alloy photovoltaic cable according to claim 1, characterized in that: The two sealed cavities (65) inside each of the accommodating cavities (63) are connected to the interior of the corresponding flame retardant cavity (62), and the interior of each of the flame retardant cavities (62) and the two connected sealed cavities (65) are filled with inert expansion gas, and the inner side of each of the flame retardant cavities (62) is connected to the outer wall of the wrapping layer (4).

3. The oxidation-resistant insulated aluminum alloy photovoltaic cable according to claim 2, characterized in that: The side of each regulating chamber (64) away from the isolation ring (61) is fixedly connected to the inner side of the outer protective layer (5), the side of each regulating chamber (64) close to the isolation ring (61) is connected to the interior of the corresponding accommodating cavity (63), and each extrusion piece (66) can enter the interior of the corresponding regulating chamber (64).

4. The oxidation-resistant insulated aluminum alloy photovoltaic cable according to claim 3, characterized in that: An extrusion groove (67) is formed at the bottom of each extrusion piece (66).

5. The oxidation-resistant insulated aluminum alloy photovoltaic cable according to claim 4, characterized in that: The interior of each regulating chamber (64) is filled with gas, and the gas pressure can squeeze the corresponding extrusion member (66), so that the bottom of the extrusion member (66) can be in close contact with the inner wall of the accommodating chamber (63), so that a gas storage chamber (68) is formed between the extrusion groove (67) and the inner wall of the accommodating chamber (63), so that the extrusion member (66) is located between the corresponding two sealing chambers (65), and the corresponding two sealing chambers (65) are in a compressed state.

6. The oxidation-resistant insulated aluminum alloy photovoltaic cable according to claim 5, characterized in that: The interior of each of the gas storage chambers (68) is filled with gas, and the gas pressure is lower than the gas pressure inside the corresponding regulating chamber (64).

7. The oxidation-resistant insulated aluminum alloy photovoltaic cable according to claim 6, characterized in that: When the side of the regulating chamber (64) away from the isolation ring (61) is connected to the outside, the gas inside the regulating chamber (64) will flow to the outside, and the pressure inside the regulating chamber (64) will be lower than the pressure inside the corresponding gas storage chamber (68). The pressure inside the gas storage chamber (68) can push the corresponding extrusion member (66) to move toward the regulating chamber (64), so that the opposite sides of the corresponding two sealing chambers (65) can approach each other and contact and support the bottom of the corresponding extrusion member (66).

8. The oxidation-resistant insulated aluminum alloy photovoltaic cable according to claim 7, characterized in that: A connecting groove (69) communicating with the corresponding extrusion groove (67) is provided on one side of each of the extrusion members (66) close to the two corresponding sealing cavities (65); a limiting groove (610) is provided inside each of the connecting grooves (69); a sealing plate (611) is slidably connected inside each of the limiting grooves (610); and a guide groove (612) is provided inside each of the limiting grooves (610).

9. The oxidation-resistant insulated aluminum alloy photovoltaic cable according to claim 8, characterized in that: When the extrusion piece (66) is located between the two corresponding sealing chambers (65), the guide groove (612) and the connecting groove (69) on the same side can be blocked by the corresponding sealing chamber (65); when the extrusion piece (66) is located inside the corresponding regulating chamber (64), the extrusion piece (66) can divide the inside of the regulating chamber (64) into a first regulating chamber (613) and a second regulating chamber (614), and the two guide grooves (612) on the same extrusion piece (66) are respectively connected to the corresponding first regulating chamber (613) and the second regulating chamber (614).

10. The oxidation-resistant insulated aluminum alloy photovoltaic cable according to claim 9, characterized in that: When the extrusion member (66) moves toward the regulating chamber (64) and the opposite sides of the corresponding two sealed chambers (65) approach each other, the two sealed chambers (65) can squeeze the gas between the two sealed chambers (65), allowing the gas to enter the interior of the corresponding extrusion groove (67) and respectively enter the interior of the corresponding two connecting grooves (69), pushing the sealing plate (611) inside the corresponding limiting groove (610) to move in a direction away from the extrusion groove (67), allowing the corresponding limiting groove (610) to communicate with the guide groove (612), allowing the gas to enter the interior of the corresponding first regulating chamber (613) and the second regulating chamber (614).

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