An antioxidant and insulating aluminum alloy photovoltaic cable

Abstract

The present invention provides an antioxidant and insulating aluminum alloy photovoltaic cable, belonging to the technical field of cables. The antioxidant and insulating aluminum alloy photovoltaic cable includes a conductor, an insulating layer, a filling layer, a tape layer and an outer sheath, and further includes an isolation layer. Through the arrangement of the extrusion member and the sealing cavity, when the cable is in use and oxidation corrosion occurs to generate cracks, the corresponding adjustment chamber will communicate with the outside, and the gas will flow to the outside. The pressure inside the gas storage chamber can push the corresponding extrusion member towards the adjustment chamber, enabling the corresponding two sealing cavities to approach and contact each other, forming an isolation zone and supporting the bottom of the extrusion member, enabling the extrusion member to contact the inner side of the adjustment chamber, sealing the adjustment chamber with oxidation cracks, achieving isolation from the outside gas, effectively preventing the outside gas from entering the inside of the cable, preventing the outside gas from oxidizing and corroding the conductor, the insulating layer and the tape layer, and improving the service life of the cable.

Description

Technical Field

[0001] The present invention belongs to the technical field of cables, and particularly relates to an antioxidant-insulated aluminum alloy photovoltaic cable. Background Art

[0002] An aluminum alloy photovoltaic cable is a photovoltaic cable that is resistant to high and low temperatures and has a long service life. It is specifically used as a lead wire for connecting photovoltaic modules and distribution boxes in a photovoltaic power generation system. The aluminum alloy photovoltaic cable is made of materials such as a cable core, an insulating layer, and a sheath layer.

[0003] Existing photovoltaic cables are usually installed outdoors. After long-term use, affected by environments such as humidity and high temperature, the outer sheath of the cable will oxidize. When the outer sheath of the cable is corroded by oxidation, external gases will further cause oxidation corrosion to the inner layer of the cable. If external gases enter the cable interior and come into contact with the insulating layer, it will cause the insulating material of the cable to oxidize and age, reducing its thermal stability and antioxidant ability, accelerating the degradation of the insulating material, and increasing the risk of electrical faults. If external gases enter the cable interior and come into contact with the conductor, it will cause oxidation to 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, deteriorating the electrical conductivity of the cable, and affecting the normal operation of the cable. In summary, external gases entering the cable interior will affect the service life of the cable. Moreover, after the outer sheath of the cable is corroded by oxidation, cracks will appear on the surface of the outer sheath. At this time, when the cable bends or experiences thermal expansion inside the cable during use, the force of cable deformation will directly act on the crack, and over time, the degree of the crack at this position will increase, affecting the use.

[0004] Therefore, in order to solve the above problems, an antioxidant-insulated aluminum alloy photovoltaic cable is needed. Summary of the Invention

[0005] The purpose of the present invention is to provide an antioxidant-insulated aluminum alloy photovoltaic cable, aiming to solve the problems that when existing cables are used outdoors for a long time and are affected by environments such as humidity and high temperature, the outer sheath of the cable will oxidize. When the outer sheath of the cable is corroded by oxidation, external gases will further cause oxidation corrosion to the inner layer of the cable, affecting the service life of the cable. Moreover, after the outer sheath of the cable is corroded by oxidation, cracks will appear on the surface of the outer sheath. At this time, when the cable bends or experiences thermal expansion during use, the force of cable deformation will directly act on the crack, increasing the degree of the crack at this position and affecting the use.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] An antioxidant-insulated aluminum alloy photovoltaic cable, comprising a conductor, an insulating layer, a filling layer, a tape layer, and an outer sheath, further comprising;

[0008] An isolation layer, multiple groups of the isolation layer are provided and are equidistantly distributed between the tape layer and the outer sheath along the length direction of the cable. The isolation layer includes an isolation ring. The inner side of the isolation ring is fixedly connected with a plurality of flame-retardant cavities that are equidistantly distributed. The outer wall of the isolation ring is provided with accommodation cavities that have the same number and corresponding positions as the flame-retardant cavities. The outer side of the isolation ring is fixedly connected with adjustment chambers that have the same number and corresponding positions as the accommodation cavities. Two symmetrically arranged sealing cavities are connected inside each of the accommodation cavities, and an extrusion member is connected between every two of the sealing cavities.

[0009] Preferably, the two sealing cavities inside each of the accommodation cavities are both communicated with the inside of the corresponding flame-retardant cavity, and the inside of each of the flame-retardant cavities and the two communicated sealing cavities is filled with an inert expansion gas. The inner side of each of the flame-retardant cavities is connected to the outer wall of the tape layer.

[0010] Preferably, one side of each of the adjustment chambers away from the isolation ring is fixedly connected to the inner side of the outer sheath. One side of each of the adjustment chambers close to the isolation ring is communicated with the inside of the corresponding accommodation cavity. Each of the extrusion members can enter the inside of the corresponding adjustment chamber.

[0011] Preferably, an extrusion groove is provided at the bottom of each of the extrusion members.

[0012] Preferably, the inside of each of the adjustment chambers is filled with a gas, and the gas pressure can extrude the corresponding extrusion member, enabling the bottom of the extrusion member to be in close contact with the inner wall of the accommodation cavity, enabling a gas storage chamber to be formed between the extrusion groove and the inner wall of the accommodation cavity, enabling the extrusion member to be located between the corresponding two sealing cavities, and enabling the corresponding two sealing cavities to be in a compressed state.

[0013] Preferably, the inside of each of the gas storage chambers is filled with a gas, and the gas pressure is less than the gas pressure inside the corresponding adjustment chamber.

[0014] Preferably, when one side of the adjustment chamber away from the isolation ring is communicated with the outside, the gas inside the adjustment chamber will flow to the outside, the pressure inside the adjustment chamber will be less than the pressure inside the corresponding gas storage chamber, the pressure inside the gas storage chamber can push the corresponding extrusion member to move towards the adjustment chamber, enabling the opposite sides of the corresponding two sealing cavities to approach and contact each other, and to contact and support the bottom of the corresponding extrusion member.

[0015] Preferably, a communication groove communicated with the corresponding extrusion groove is provided on one side of each of the extrusion members close to the corresponding two sealing cavities. A limiting groove is provided inside each of the communication grooves. A blocking plate is slidably connected inside each of the limiting grooves. A diversion groove is provided inside each of the limiting grooves.

[0016] Preferably, when the extrusion member is located between two corresponding sealing cavities, the flow guiding grooves and the communication grooves on the same side can be blocked by the corresponding sealing cavities. When the extrusion member is located inside the corresponding adjustment chamber, the extrusion member can divide the inside of the adjustment chamber into a first adjustment chamber and a second adjustment chamber, and the two flow guiding grooves on the same extrusion member are respectively communicated with the corresponding first adjustment chamber and the second adjustment chamber.

[0017] Preferably, when the extrusion member moves towards the adjustment chamber and the opposite sides of the two corresponding sealing cavities approach each other, the two sealing cavities can squeeze the gas between the two sealing cavities, enabling the gas to enter the interior of the corresponding extrusion groove and then enter the interiors of the two corresponding communication grooves respectively, pushing the plugging plate inside the corresponding limit groove to move away from the extrusion groove, enabling the corresponding limit groove to communicate with the flow guiding groove, and enabling the gas to enter the interiors of the corresponding first adjustment chamber and the second adjustment chamber.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] 1. Through the arrangement of the extrusion member and the sealing cavity, during the use of the cable, if oxidation corrosion occurs and cracks appear, the corresponding adjustment chamber in the corresponding isolation layer will communicate with the outside world, the gas will flow to the outside, the pressure inside the adjustment chamber will be less than the pressure inside the corresponding gas storage chamber, the gas pressure inside the gas storage chamber can push the corresponding extrusion member towards the adjustment chamber, enabling the two corresponding sealing cavities to approach and contact each other, forming an isolation belt and supporting the bottom of the extrusion member, enabling the extrusion member to contact the inner side of the adjustment chamber, plugging the adjustment chamber with oxidation cracks, realizing the isolation from the outside gas, effectively preventing the outside gas from entering the cable, preventing the oxidation corrosion of the conductor, the insulating layer, and the tape layer by the outside gas, and improving the service life of the cable.

[0020] 2. Through the arrangement of the flow guiding groove and the communication groove, during the long-term use of the cable, if oxidation corrosion occurs and cracks appear, the corresponding adjustment chamber will communicate with the outside world, the gas will flow to the outside, the pressure inside the gas storage chamber can push the corresponding extrusion member towards the adjustment chamber, enabling the two corresponding sealing cavities to approach and contact each other and contact and support the bottom of the extrusion member. During this process, the two sealing cavities can squeeze the gas between the two sealing cavities, enabling the gas to enter the interiors of the corresponding first adjustment chamber and the second adjustment chamber. By changing the air pressure inside the first adjustment chamber and the second adjustment chamber, the position of the extrusion member can be adjusted to ensure that the extrusion member can effectively plug the crack of the adjustment chamber, avoiding the phenomenon of inability to plug, and improving the isolation effect of the outside gas.

[0021] 3. In the present invention, through the provision of a flame-retardant chamber and a sealing chamber, during the use of the cable, if oxidation corrosion occurs and cracks appear, the corresponding adjustment chamber will communicate with the outside, and the gas will flow to the outside. This can cause the corresponding pressing member to move towards the adjustment chamber, enabling the corresponding two sealing chambers to approach and contact each other and contact the bottom of the pressing member for support. If bending occurs at the position of the cable crack or the cable experiences thermal expansion at this time, the force of cable deformation will act on the flame-retardant chamber and the sealing chamber at the corresponding position, and can be buffered through the flame-retardant chamber and the sealing chamber, preventing the force of deformation from directly acting on the crack of the cable and preventing the crack from worsening, thereby increasing the service life of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The 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, but do not constitute a limitation to the present invention. In the drawings:

[0023] Figure 1 is a schematic structural diagram of the cable of the present invention.

[0024] Figure 2 is a structural distribution diagram of the tape layer and the outer protective layer of the present invention.

[0025] Figure 3 is a structural distribution diagram of the isolation layer of the present invention.

[0026] Figure 4 is a schematic overall structural diagram of the isolation layer of the present invention.

[0027] Figure 5 is a schematic internal structural diagram of the isolation layer of the present invention.

[0028] Figure 6 is a schematic structural diagram of the isolation ring of the present invention.

[0029] Figure 7 is a schematic structural diagram of the adjustment chamber and the accommodation chamber of the present invention.

[0030] Figure 8 is a schematic structural diagram of the first adjustment chamber and the second adjustment chamber of the present invention.

[0031] Figure 9 is a schematic structural diagram of the pressing member of the present invention.

[0032] Figure 10 is a schematic structural diagram of the plugging plate of the present invention.

[0033] In the figure: 1. Conductor; 2. Insulating layer; 3. Filling layer; 4. Tape layer; 5. Outer sheath; 6. Isolation layer; 61. Isolation ring; 62. Flame-retardant cavity; 63. Accommodation cavity; 64. Adjustment chamber; 65. Sealing cavity; 66. Extrusion part; 67. Extrusion groove; 68. Gas storage chamber; 69. Connecting groove; 610. Limit groove; 611. Plugging plate; 612. Diversion groove; 613. First adjustment chamber; 614. Second adjustment chamber. Detailed implementation mode

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0035] Embodiment 1

[0036] Existing photovoltaic cables are usually installed outdoors. After long-term use, affected by environments such as humidity and high temperature, the outer sheath of the cable will oxidize. When the outer sheath of the cable is corroded by oxidation, external gases will further oxidize and corrode the inner layer of the cable. If external gases enter the cable and come into contact with the insulating layer, the insulating material of the cable will be oxidized and aged over a long time, reducing its thermal stability and antioxidant ability, accelerating the degradation of the insulating material, and increasing the risk of electrical faults. If external gases enter the cable and come into contact with the conductor, the conductor inside the cable will be oxidized over a long time, an oxide layer will form on the surface of the conductor, increasing the resistivity of the cable, resulting in a decrease in the current transmission efficiency and a deterioration of the electrical conductivity of the cable. If external gases enter the cable and come into contact with the tape layer, the tape layer will be corroded and aged over a long time, affecting the binding effect of the tape layer on the cable. In summary, the entry of external gases into the cable will affect the service life of the cable.

[0037] Please refer to Figures 1 to 8 , the present invention provides the following technical solutions: an antioxidant and insulating aluminum alloy photovoltaic cable, including a conductor 1, an insulating layer 2, a filling layer 3, a tape layer 4 and an outer sheath 5, and further including;

[0038] As Figure 3As shown, there are multiple isolation layers 6, which are evenly distributed at equal intervals along the length direction of the cable between the tape layer 4 and the outer sheath layer 5. The isolation layer 6 includes an isolation ring 61. The inner side of the isolation ring 61 is fixedly connected with a plurality of equally spaced flame-retardant cavities 62. The outer wall of the isolation ring 61 is provided with accommodation cavities 63 having the same number and corresponding positions as the flame-retardant cavities 62. The outer side of the isolation ring 61 is fixedly connected with adjustment bins 64 having the same number and corresponding positions as the accommodation cavities 63. The interior of each accommodation cavity 63 is connected with two symmetrically arranged sealing cavities 65, and an extrusion member 66 is connected between every two sealing cavities 65.

[0039] On the opposite sides of the two sealing cavities 65 in the same accommodation cavity 63, both are fixedly connected to the inner wall of the corresponding accommodation cavity 63.

[0040] The two sealing cavities 65 inside each accommodation cavity 63 are both communicated with the interior of the corresponding flame-retardant cavity 62, and the interiors of each flame-retardant cavity 62 and the two connected sealing cavities 65 are filled with inert expansion gas. The inner side of each flame-retardant cavity 62 is connected to the outer wall of the tape layer 4.

[0041] The inert expansion gas can be helium, neon, argon, krypton or xenon, and can be selected according to requirements. The inert expansion gas is an existing technology and will not be elaborated here.

[0042] On the side of each adjustment bin 64 away from the isolation ring 61, it is fixedly connected to the inner side of the outer sheath layer 5. On the side of each adjustment bin 64 close to the isolation ring 61, it is communicated with the interior of the corresponding accommodation cavity 63, and each extrusion member 66 can enter the interior of the corresponding adjustment bin 64.

[0043] The extrusion member 66 located between the two sealing cavities 65 can squeeze the two sealing cavities 65, enabling the two sealing cavities 65 to be in a compressed state, squeezing the inert expansion gas inside the two sealing cavities 65, enabling the inert expansion gas to enter the interior of the flame-retardant cavity 62, making the flame-retardant cavity 62 closely contact and squeeze with the tape layer 4, further improving the cable laying effect of the tape 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 internal conductor 1 of the cable will heat up, which may cause the wire insulation material to age and lead to a fire. At this time, the flame generated inside the cable can burn through the flame-retardant cavity 62, enabling the inert expansion gas inside the flame-retardant cavity 62 to enter the interior of the cable, and extinguishing and flame-retarding the flame through the inert expansion gas. Since the extrusion member 66 squeezing the sealing cavity 65 can enhance the pressure inside the flame-retardant cavity 62, it can improve the release speed of the inert expansion gas inside the flame-retardant cavity 62, accelerate the fire extinguishing efficiency, and improve the flame-retardant effect.

[0044] An extrusion groove 67 is provided at the bottom of each extrusion member 66.

[0045] The interior of each adjustment chamber 64 is filled with gas, and the gas pressure can squeeze the corresponding squeezing member 66, enabling the bottom of the squeezing member 66 to be in close contact with the inner wall of the accommodation chamber 63, forming a gas storage chamber 68 between the squeezing groove 67 and the inner wall of the accommodation chamber 63, enabling the squeezing member 66 to be located between the corresponding two sealing chambers 65, and enabling the corresponding two sealing chambers 65 to be in a compressed state.

[0046] The interior of each gas storage chamber 68 is filled with gas, and the gas pressure is less than the gas pressure inside the corresponding adjustment chamber 64.

[0047] Both the gas storage chamber 68 and the adjustment chamber 64 are filled with gas, and during the manufacturing process, it is necessary to first fill the adjustment chamber 64 with gas to ensure that the squeezing member 66 can be preferentially located between the two sealing chambers 65. Since the two sealing chambers 65 are connected through the corresponding flame retardant chambers 62, gas exchange can be achieved, and the position of the squeezing member 66 between the two sealing chambers 65 can be automatically adjusted through the pressure of the sealing chambers 65.

[0048] When the side of the adjustment chamber 64 away from the isolation ring 61 is connected to the outside, the gas inside the adjustment chamber 64 will flow to the outside, the pressure inside the adjustment chamber 64 will be less than the pressure inside the corresponding gas storage chamber 68, and the pressure inside the gas storage chamber 68 can push the corresponding squeezing member 66 to move towards the adjustment chamber 64, enabling the opposite sides of the corresponding two sealing chambers 65 to approach and contact each other and contact and support the bottom of the corresponding squeezing member 66.

[0049] The gas pressure inside the gas storage chamber 68 is less than the gas pressure inside the corresponding adjustment chamber 64 and is greater than the atmospheric pressure, aiming to ensure that when the adjustment chamber 64 is connected to the outside after being oxidized and corroded, the pressure inside the gas storage chamber 68 can push the corresponding squeezing member 66 to move towards the adjustment chamber 64.

[0050] Under normal conditions, that is, when the cable is not oxidized and corroded, the gas pressure inside the adjustment chamber 64 is greater than the gas pressure inside the gas storage chamber 68, the squeezing member 66 is located between the corresponding two sealing chambers 65, and the corresponding two sealing chambers 65 are both in a compressed state.

[0051] It should be noted that since the adjustment chamber 64 is connected to the outer protective layer 5, during the long-term use of the cable, if oxidation corrosion occurs and cracks appear, the corresponding adjustment chamber 64 in the isolation layer 6 at the corresponding position will communicate with the outside world. The gas inside the adjustment chamber 64 will flow to the outside, and the pressure inside the adjustment chamber 64 will be less than the pressure inside the corresponding gas storage chamber 68. The pressure inside the gas storage chamber 68 can push the corresponding pressing member 66 towards the adjustment chamber 64, causing the opposite sides of the corresponding two sealing chambers 65 to approach and contact each other, forming an isolation zone through the two sealing chambers 65. After the opposite sides of the two sealing chambers 65 come into contact, the tops of the two sealing chambers 65 can contact the bottom of the corresponding pressing member 66 to support the pressing member 66, making the side of the pressing member 66 away from the sealing chamber 65 contact the inner side of the adjustment chamber 64, blocking the adjustment chamber 64 with oxidation cracks, and achieving isolation from the outside gas. Thus, through the isolation and blocking of the sealing chamber 65 and the pressing member 66, it can effectively prevent the outside gas from entering the cable, prevent the oxidation corrosion of the conductor 1, the insulating layer 2, and the tape layer 4 by the outside gas, and improve the service life.

[0052] When the pressing member 66 contacts the inner layer of the adjustment chamber 64 and the tops of the corresponding two sealing chambers 65 contact the bottom of the pressing member 66 for support, during the long-term use of the cable, the conductor 1 of the cable will generate heat, and the inert expansion gas inside the flame retardant chamber 62 will expand when heated, increasing the gas pressure inside the corresponding two sealing chambers 65. This can not only further make the two sealing chambers 65 contact tightly, improving the isolation effect, but also enhance the support strength of the sealing chamber 65 for the pressing member 66, improving the blocking effect on the adjustment chamber 64. In this way, during the use of the cable, the isolation effect on the outside gas can be further improved.

[0053] With the arrangement of the pressing member 66 and the sealing chamber 65 in the present invention, during the use of the cable, if oxidation corrosion occurs and cracks appear, the corresponding adjustment chamber 64 in the isolation layer 6 at the corresponding position will communicate with the outside world, the gas will flow to the outside, the pressure inside the adjustment chamber 64 will be less than the pressure inside the corresponding gas storage chamber 68, and the gas pressure inside the gas storage chamber 68 can push the corresponding pressing member 66 towards the adjustment chamber 64, causing the corresponding two sealing chambers 65 to approach and contact each other, forming an isolation zone, and supporting the bottom of the pressing member 66, making the pressing member 66 contact the inner side of the adjustment chamber 64, blocking the adjustment chamber 64 with oxidation cracks, achieving isolation from the outside gas, effectively preventing the outside gas from entering the cable, preventing the oxidation corrosion of the conductor 1, the insulating layer 2, and the tape layer 4 by the outside gas, and improving the service life of the cable.

[0054] Embodiment 2

[0055] On the basis of the above embodiments, during the use of the cable, when cracks occur due to oxidation corrosion, the adjustment chamber 64 at the corresponding position will communicate with the outside. Although the crack can be blocked by the contact between the extrusion member 66 and the inner side of the adjustment chamber 64, if the extrusion member 66 does not correspond to the position of the crack, the extrusion member 66 will not be able to directly and effectively block the crack in the adjustment chamber 64, resulting in a situation where the crack cannot be blocked, which affects the isolation of external gases.

[0056] Please refer to Figures 5 to 10 , on one side of each extrusion member 66 close to the corresponding two sealing chambers 65, a communication groove 69 communicating with the corresponding extrusion groove 67 is formed. A limiting groove 610 is formed inside each communication groove 69, and a plugging plate 611 is slidably connected inside each limiting groove 610. A diversion groove 612 is formed inside each limiting groove 610.

[0057] When the extrusion member 66 is located between the corresponding two sealing chambers 65, the diversion groove 612 and the communication groove 69 on the same side can be blocked by the corresponding sealing chamber 65. When the extrusion member 66 is located inside the corresponding adjustment chamber 64, the extrusion member 66 can divide the interior of the adjustment chamber 64 into a first adjustment chamber 613 and a second adjustment chamber 614, and the two diversion grooves 612 on the same extrusion member 66 are respectively communicated with the corresponding first adjustment chamber 613 and second adjustment chamber 614.

[0058] Under normal conditions, that is, when the cable has no oxidation corrosion, the extrusion member 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 member 66 through the internal gas pressure, can effectively fit tightly with the outer side of the extrusion member 66, can block the diversion groove 612 and the communication groove 69, and can avoid the leakage of the gas inside the gas storage chamber 68.

[0059] When the extrusion member 66 moves towards the adjustment chamber 64 and the opposite sides of the corresponding two sealing chambers 65 approach each other, the two sealing chambers 65 can squeeze the gas between the two sealing chambers 65, enabling the gas to enter the interior of the corresponding extrusion groove 67 and respectively enter the interiors of the corresponding two communication grooves 69, pushing the plugging plate 611 inside the corresponding limiting groove 610 to move away from the extrusion groove 67, enabling the corresponding limiting groove 610 to communicate with the diversion groove 612, and enabling the gas to enter the interiors of the corresponding first adjustment chamber 613 and second adjustment chamber 614.

[0060] Such as Figure 10As shown, each plugging plate 611 can move left and right inside the corresponding limiting groove 610. When the plugging plate 611 moves to the inner wall of the limiting groove 610 close to the extrusion groove 67, it can plug the communication groove 69, and the gas inside the extrusion groove 67 cannot enter the corresponding communication groove 69, so that the corresponding diversion groove 612 cannot be connected to the extrusion groove 67 through the corresponding communication groove 69. When the plugging plate 611 moves to the inner wall of the limiting groove 610 far from the extrusion groove 67, it can make the corresponding diversion groove 612 communicate with the extrusion groove 67 through the corresponding communication groove 69.

[0061] It should be noted that during the long-term use of the cable, when cracks occur due to local oxidation corrosion in the outer sheath 5, the corresponding adjustment chamber 64 in the isolation layer 6 at the corresponding position will communicate with the outside world, and the gas will flow to the outside. The pressure inside the adjustment chamber 64 will be less 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 towards the adjustment chamber 64, enabling the two corresponding sealing chambers 65 to approach and contact and support the bottom of the extrusion member 66. During this process, the two sealing chambers 65 can squeeze the gas between the two sealing chambers 65, that is, the gas originally inside the gas storage chamber 68, enabling the gas to enter the extrusion groove 67 of the extrusion member 66 located at the top of the sealing chamber 65, enabling the gas to enter the internal parts of the two corresponding communication grooves 69 respectively, and pushing the plugging plate 611 inside the corresponding limiting groove 610 to move away from the extrusion groove 67, enabling the corresponding limiting groove 610 to communicate with the diversion groove 612, and enabling the gas to enter the corresponding first adjustment chamber 613 and second adjustment chamber 614. If the crack is located on the right side of the isolation layer 6, that is, above the first adjustment chamber 613, the gas entering the first adjustment chamber 613 will be discharged to the outside through the crack, while the gas entering the second adjustment chamber 614 will increase the pressure inside the second adjustment chamber 614 and make it greater than the atmospheric pressure. When the pressure inside the second adjustment chamber 614 is greater than the pressure inside the extrusion groove 67, the gas pressure inside the second adjustment chamber 614 can push the plugging plate 611 inside the corresponding limiting groove 610 to move towards the extrusion groove 67, blocking the communication groove 69. At this time, since the first adjustment chamber 613 communicates with the outside world and the pressure of the first adjustment chamber 613 is less than the gas pressure inside the second adjustment chamber 614, the gas pressure inside the second adjustment chamber 614 can push the extrusion member 66 on the top of the sealing chamber 65 towards the first adjustment chamber 613 until it moves to the bottom of the crack. If the crack is located on the left side of the isolation layer 6, that is, above the second adjustment chamber 614, the gas entering the second adjustment chamber 614 will be discharged to the outside through the crack, while the gas entering the first adjustment chamber 613 will increase the pressure inside the first adjustment chamber 613 and make it greater than the atmospheric pressure. When the pressure inside the first adjustment chamber 613 is greater than the pressure inside the extrusion groove 67, the gas pressure inside the first adjustment chamber 613 can push the plugging plate 611 inside the corresponding limiting groove 610 to move towards the extrusion groove 67, blocking the communication groove 69. At this time, since the second adjustment chamber 614 communicates with the outside world and the pressure of the second adjustment chamber 614 is less than the gas pressure inside the first adjustment chamber 613, the gas pressure inside the first adjustment chamber 613 can push the extrusion member 66 on the top of the sealing chamber 65 towards the second adjustment chamber 614 until it moves to the bottom of the crack. Thus, by changing the air pressure inside the first adjustment chamber 613 and the second adjustment chamber 614, the position of the extrusion member 66 can be adjusted.Ensure that the extruded part 66 can effectively block the crack of the adjustment chamber 64, avoid the phenomenon of unable to block, and improve the isolation effect of external gas.

[0062] Through the settings of the diversion groove 612 and the communication groove 69 in the present invention, during the use of the cable, if cracks occur due to oxidation corrosion, the corresponding adjustment chamber 64 will be connected to the outside, the gas will flow to the outside, the pressure inside the adjustment chamber 64 will be less than the pressure inside the corresponding gas storage chamber 68, and the pressure inside the gas storage chamber 68 can push the corresponding extruded part 66 towards the adjustment chamber 64, enabling the corresponding two sealing chambers 65 to approach and contact and support the bottom of the extruded part 66. During this process, the two sealing chambers 65 can squeeze the gas between the two sealing chambers 65, enabling the gas to enter the corresponding first adjustment chamber 613 and second adjustment chamber 614. Through the change of the air pressure inside the first adjustment chamber 613 and the second adjustment chamber 614, the position of the extruded part 66 can be adjusted to ensure that the extruded part 66 can effectively block the crack of the adjustment chamber 64, avoid the phenomenon of unable to block, and improve the isolation effect of external gas.

[0063] Embodiment III

[0064] On the basis of the above embodiment, after the outer sheath 5 of the cable is locally oxidized and corroded, 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 is bent 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, and over time, the degree of the crack at this position will increase, affecting the service life.

[0065] Please refer to Figures 5 to 8 A plurality of equally spaced flame-retardant chambers 62 are fixedly connected to the inner side of the isolation ring 61, and two symmetrically arranged sealing chambers 65 are connected to the inside of each accommodation chamber 63.

[0066] It should be noted that during the long-term use of the cable, if cracks occur due to local oxidation and corrosion of the outer sheath 5, the corresponding adjustment chamber 64 in the corresponding isolation layer 6 will be connected to the outside, the gas will flow to the outside, the pressure inside the adjustment chamber 64 will be less than the pressure inside the corresponding gas storage chamber 68, and the pressure inside the gas storage chamber 68 can push the corresponding extruded part 66 towards the adjustment chamber 64, enabling the corresponding two sealing chambers 65 to approach and contact and support the bottom of the extruded part 66. If the position of the cable crack is bent or the cable thermally expands at this time, the force of the cable deformation will act on the corresponding flame-retardant chamber 62 and sealing chamber 65, and can be buffered through the flame-retardant chamber 62 and the sealing chamber 65, avoiding the direct action of the deformation force on the crack of the cable, preventing the increase of the crack degree, and improving the service life of the cable.

[0067] In the present invention, through the provision of the flame retardant chamber 62 and the sealing chamber 65, during the use of the cable, if oxidation corrosion occurs and cracks are generated, the corresponding adjustment chamber 64 in the corresponding isolation layer 6 will communicate with the outside world, and the gas will flow to the outside. This can cause the corresponding pressing member 66 to move towards the adjustment chamber 64, enabling the two corresponding sealing chambers 65 to approach and contact each other and contact the bottom of the pressing member 66 for support. If bending occurs at the position of the cable crack or the cable thermally expands at this time, the force of cable deformation will act on the corresponding flame retardant chamber 62 and sealing chamber 65, and can be buffered through the flame retardant chamber 62 and the sealing chamber 65, preventing the force of deformation from directly acting on the crack of the cable and preventing the degree of the crack from increasing, thereby improving the service life of the cable.

[0068] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within 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) the same number as the flame retardant cavities (62) and corresponding in position, the outer side of the isolation ring (61) is fixedly connected to regulating chambers (64) the same number as the accommodating cavities (63) and corresponding in position, each accommodating cavity (63) is internally connected to two symmetrically arranged sealing cavities (65), and an extrusion piece (66) is connected between each two sealing cavities (65); Each of the extrusion pieces (66) is provided with an extrusion groove (67) at the bottom; 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 sealed chambers (65), and the corresponding two sealed chambers (65) are in a compressed state; 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); 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).

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: 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).

5. The oxidation-resistant insulated aluminum alloy photovoltaic cable according to claim 4, 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).

6. The oxidation-resistant insulated aluminum alloy photovoltaic cable according to claim 5, 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).

Images