A two-core aluminium alloy conductor low voltage cable for photovoltaics

Abstract

The present application relates to the technical field of cable, in particular to a kind of two-core aluminum alloy conductor low-voltage cable for photovoltaic, including two aluminum alloy wire core, the outside of two aluminum alloy wire core is collectively equipped with shielding layer, the shielding layer includes integrally formed metal shielding net and pouring layer, the metal shielding net is located in the inside of pouring layer, the metal shielding net is corrugated tube structure, metal shielding net includes a plurality of connected shielding parts, each shielding part includes symmetrically arranged and connected first shielding ring and second shielding ring, the circumferential direction of the first shielding ring and second shielding ring is equipped with a plurality of mesh, the angle between the first shielding ring and second shielding ring is adjustable, so as to change the proportion of mesh on the surface area of shielding layer, realize the change of shielding effect of shielding layer, so as to ensure the processing efficiency of cable without changing the size of mesh.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cables, in particular to a two-core aluminum alloy conductor low-voltage cable for photovoltaic. BACKGROUND

[0002] The two cores of the two-core aluminum alloy conductor low-voltage cable are respectively used for transmitting current or signals, one core is responsible for transmitting current or signals, and the other core is used as a return path to form a closed loop of current. The two-core aluminum alloy conductor low-voltage cable is simple to manufacture and has low material cost, so it is widely used in photovoltaic power generation scenarios.

[0003] The two-core aluminum alloy conductor low-voltage cable in the prior art has a shielding layer inside for shielding electromagnetic interference. The shielding layer is a mesh structure woven by metal wires or metal strips. The mesh size of the mesh structure is inversely proportional to the weaving coverage rate of the mesh structure, and the weaving coverage rate of the mesh structure is proportional to the shielding effect of the shielding layer. Since the required shielding effect of the cable is different in different application scenarios, the mesh size of the mesh structure needs to be adjusted each time, and the weaving efficiency of the mesh structure is low, thereby affecting the processing efficiency of the cable. SUMMARY

[0004] Therefore, it is necessary to provide a two-core aluminum alloy conductor low-voltage cable for photovoltaic to solve the technical problem that the shielding effect of the shielding layer is not convenient to adjust.

[0005] The above-mentioned purpose is achieved by the following technical solutions:

[0006] A two-core aluminum alloy conductor low-voltage cable for photovoltaic includes two aluminum alloy wire cores, and a shielding layer is commonly provided outside the two aluminum alloy wire cores. The shielding layer includes an integrally formed metal shielding mesh and a pouring layer. The metal shielding mesh is located inside the pouring layer. The metal shielding mesh has a corrugated tube structure. The metal shielding mesh includes a plurality of connected shielding portions. Each shielding portion includes a first shielding ring and a second shielding ring that are symmetrically arranged and connected. A plurality of mesh holes are arranged on the circumferential direction of the first shielding ring and the second shielding ring. The angle between the first shielding ring and the second shielding ring is adjustable, so as to change the proportion of the mesh holes on the surface area of the shielding layer.

[0007] Further, the mesh holes are uniformly distributed in the circumferential direction of the first shielding ring and the second shielding ring. The mesh holes are circular holes or rectangular holes.

[0008] Further, the mesh holes on the first shielding ring and the second shielding ring are arranged in more than two circles around the circumferential direction, and the two circles of mesh holes are correspondingly arranged along the axial direction of the metal shielding mesh.

[0009] Further, the mesh holes on the first shielding ring and the second shielding ring are correspondingly arranged along the axial direction of the metal shielding mesh.

[0010] Further, along the axis direction of the metal shielding net, the first shielding ring is arranged staggered with the mesh on the second shielding ring.

[0011] Further, the pouring layer is a rubber layer.

[0012] Further, the metal shielding net is made by stamping and folding.

[0013] Further, the metal shielding net is made of copper or aluminum material.

[0014] Further, the outer part of the shielding layer is further provided with a protective sleeve, and the material of the protective sleeve is PVC or PE.

[0015] Further, a filling layer is arranged between the outer part of the two aluminum alloy wire cores and the shielding layer, and the filling layer is a jute cotton rope.

[0016] The photovoltaic two-core aluminum alloy conductor low-voltage cable provided by the application can change the proportion of the mesh on the surface area of the shielding layer by changing the included angle between the first shielding ring and the second shielding ring through axial stretching or contraction of the metal shielding net, so as to change the shielding effect of the shielding layer, and then the metal shielding net can be poured into the pouring layer, so that the size of the mesh does not need to be changed, the processing difficulty of the shielding layer is reduced, and the processing efficiency of the cable is ensured.

[0017] Secondly, the metal shielding net in the application is in a bellows structure, and has a certain thickness in the radial direction of the cable, so compared with the single-layer braided net structure in the prior art, the metal shielding net is more easily bent and deformed when the cable is bent, has better flexibility, and can prolong the service life of the cable. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The three-dimensional structure schematic diagram of the photovoltaic two-core aluminum alloy conductor low-voltage cable provided by an embodiment of the application is shown in the figure.

[0019] Figure 2 The structure explosion schematic diagram of the photovoltaic two-core aluminum alloy conductor low-voltage cable provided by an embodiment of the application is shown in the figure.

[0020] Figure 3 The Figure 2 The structure enlargement diagram of the X part in the figure.

[0021] Figure 4 The side view of the photovoltaic two-core aluminum alloy conductor low-voltage cable provided by an embodiment of the application is shown in the figure.

[0022] Figure 5 For Figure 4 A-A sectional view in the middle;

[0023] Figure 6 For Figure 5 Structure enlarged view at Y.

[0024] Wherein:

[0025] 111, protective sleeve; 112, pouring layer; 113, filling layer; 114, aluminum alloy wire core; 120, metal shielding net; 121, first shielding ring; 122, mesh; 123, second shielding ring. DETAILED DESCRIPTION

[0026] In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the embodiments and in conjunction with the drawings. It should be understood that the specific embodiments described herein are only used to explain the present application and not used to limit the present application.

[0027] The serial numbers of components in this paper, such as "first", "second", etc., are only used to distinguish the described objects, and do not have any sequence or technical meaning. And the "connection" and "coupling" of the present application, unless otherwise specified, include direct and indirect connection (coupling). In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0028] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0029] As Figures 1 to 6As shown, an embodiment of the present application provides a two-core aluminum alloy conductor low-voltage cable for photovoltaic, which comprises two aluminum alloy cores 114, and a shielding layer is arranged outside the two aluminum alloy cores 114, the shielding layer comprises an integrally formed metal shielding net 120 and a pouring layer 112, the metal shielding net 120 is located inside the pouring layer 112, the metal shielding net 120 is in a bellows structure, the metal shielding net 120 comprises a plurality of shielding parts connected with each other, each shielding part comprises a first shielding ring 121 and a second shielding ring 123 which are symmetrically arranged and connected, a plurality of mesh holes 122 are arranged on the circumferences of the first shielding ring 121 and the second shielding ring 123, and the angle between the first shielding ring 121 and the second shielding ring 123 is adjustable, so that the proportion of the mesh holes 122 on the surface area of the shielding layer can be changed.

[0030] The two-core aluminum alloy conductor low-voltage cable for photovoltaic provided by the present application can change the proportion of the mesh holes 122 on the surface area of the shielding layer by axially stretching or shrinking the metal shielding net 120 to change the angle between the first shielding ring 121 and the second shielding ring 123 when the shielding effect of the shielding layer needs to be adjusted in different application scenarios, so as to change the shielding effect of the shielding layer, and then the metal shielding net 120 can be poured into the pouring layer 112, so that the size of the mesh holes 122 does not need to be changed, the processing difficulty of the shielding layer is reduced, and the processing efficiency of the cable is ensured; meanwhile, the metal shielding net 120 of the same specification can form shielding layers with different shielding effects, and has a certain universality.

[0031] As shown, Figure 6 The first shielding ring 121 and the second shielding ring 123 are both conical rings, and the cross-sectional area of the first shielding ring 121 and the second shielding ring 123 is V-shaped. When the metal shielding net 120 is stretched, the angle between the first shielding ring 121 and the second shielding ring 123 increases, the inclination of the mesh holes 122 on the first shielding ring 121 and the second shielding ring 123 decreases, and then the proportion of the mesh holes 122 on the surface area of the shielding ring increases, and then the shielding effect of the shielding layer decreases; when the metal shielding net 120 is contracted along the axial direction, the angle between the first shielding ring 121 and the second shielding ring 123 decreases, the inclination of the mesh holes 122 on the first shielding ring 121 and the second shielding ring 123 increases, and then the proportion of the mesh holes 122 on the surface area of the shielding ring decreases, and then the shielding effect of the shielding layer increases.

[0032] The metal shielding net 120 is arranged in a bellows structure, and has a certain thickness in the radial direction of the cable. Compared with the single-layer braided net structure in the prior art, the metal shielding net 120 is more flexible and can be bent and deformed more easily when the cable is bent, so that the service life of the two-core aluminum alloy conductor low-voltage cable for photovoltaic can be prolonged.

[0033] In an embodiment, the mesh holes 122 are uniformly distributed in the circumferential direction of the first shielding ring 121 and the second shielding ring 123, which can ensure that the shielding effect of the cable on electromagnetic interference in the circumferential direction is consistent. The mesh holes 122 are circular holes or rectangular holes, which facilitate the processing of the mesh holes 122.

[0034] As Figure 4 and Figure 6 , the mesh holes 122 on the first shielding ring 121 and the second shielding ring 123 are arranged in a circle around the circumferential direction. In other embodiments, the mesh holes 122 on the first shielding ring 121 and the second shielding ring 123 are arranged in more than two circles around the circumferential direction (not shown in the figure), and the two circles of mesh holes 122 are arranged correspondingly in the axial direction of the metal shielding net 120. The number of circles of mesh holes 122 can be flexibly set according to the shielding effect of the shielding net.

[0035] In an embodiment, the mesh holes 122 on the first shielding ring 121 and the second shielding ring 123 are arranged correspondingly in the axial direction of the metal shielding net 120. The corresponding arrangement makes the processing of the mesh holes 122 simple.

[0036] In an embodiment, the mesh holes 122 on the first shielding ring 121 and the second shielding ring 123 are arranged staggered in the axial direction of the metal shielding net 120 (not shown in the figure). The staggered arrangement makes the distribution of the mesh holes 122 in the circumferential direction of the metal shielding net 120 more uniform, and the effect of resisting electromagnetic interference is also more uniform.

[0037] In an embodiment, the pouring layer 112 is a rubber layer. Using rubber material for pouring is convenient to operate, and at the same time can ensure the strength of the shielding layer, so that it is not easy to be damaged.

[0038] In an embodiment, the metal shielding net 120 is made by stamping and folding. In the manufacturing process, the mesh holes 122 are first punched out from the metal pipe by a punching machine, and then the punching and folding is performed to form a corrugated pipe structure.

[0039] In an embodiment, the metal shielding net 120 is made of copper or aluminum material. This can ensure the shielding effect of the shielding layer.

[0040] In an embodiment, the shielding layer is further provided with a protective sleeve 111, and the material of the protective sleeve 111 is PVC or PE. The protective sleeve 111 is used to prevent moisture and impurities from entering the photovoltaic two-core aluminum alloy conductor low-voltage cable.

[0041] In an embodiment, a filler layer 113 is arranged between the outer part of the two aluminum alloy wire cores 114 and the shielding layer, and the filler layer 113 is a jute cotton rope. The jute cotton rope can improve the tensile force and tensile capacity of the cable, and prolong the service life of the cable. In other embodiments, the filler layer 113 can be polyethylene foam, mineral filler, silica gel filler, etc. The filler layer 113 is used to keep the stability of the cable structure and avoid damage to the cable.

[0042] The technical features of the above embodiments can be combined in any manner. In order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, but as long as the combinations of the technical features do not contradict, they should be considered as falling within the scope of the present disclosure.

[0043] The above embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the present application. It should be pointed out that, for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A two-core aluminium alloy conductor low voltage cable for photovoltaic applications, characterized in that, The shield layer is provided with a metal shielding net and a pouring layer, the metal shielding net is made by stamping and folding, the metal shielding net is located inside the pouring layer, the metal shielding net is in a corrugated tube structure, the metal shielding net comprises a plurality of shielding parts connected with each other, each shielding part comprises a first shielding ring and a second shielding ring which are symmetrically arranged and connected, a plurality of mesh holes are arranged on the circumferences of the first shielding ring and the second shielding ring, and the angle between the first shielding ring and the second shielding ring is adjustable, so that the proportion of the mesh holes on the surface area of the shield layer can be changed. The first shielding ring and the second shielding ring are both conical rings, the cross-sectional area of the first shielding ring and the second shielding ring is V-shaped, when the metal shielding net is stretched, the angle between the first shielding ring and the second shielding ring increases, the inclination of the mesh holes on the first shielding ring and the second shielding ring decreases, the proportion of the mesh holes on the surface area of the shield layer increases, and the shielding effect of the shield layer decreases; when the metal shielding net is contracted along the axial direction, the angle between the first shielding ring and the second shielding ring decreases, the inclination of the mesh holes on the first shielding ring and the second shielding ring increases, the proportion of the mesh holes on the surface area of the shield layer decreases, and the shielding effect of the shield layer increases.

2. The two-core aluminum alloy conductor low voltage cable for photovoltaic use according to claim 1, characterized in that, The mesh holes are uniformly distributed in the circumferential direction of the first shielding ring and the second shielding ring, and the mesh holes are circular holes or rectangular holes.

3. The two-core aluminum alloy conductor low voltage cable for photovoltaic applications according to claim 2, characterized in that, The mesh holes on the first shielding ring and the second shielding ring are provided with more than two circles around the circumferential direction, and the two circles of mesh holes are correspondingly arranged along the axial direction of the metal shielding net.

4. The two-core aluminum alloy conductor low voltage cable for photovoltaic use according to claim 2, characterized in that, The mesh holes on the first shielding ring and the second shielding ring are correspondingly arranged along the axial direction of the metal shielding net.

5. The two-core aluminum alloy conductor low voltage cable for photovoltaic applications according to claim 2, characterized in that, The mesh holes on the first shielding ring and the second shielding ring are staggered along the axial direction of the metal shielding net.

6. The two-core aluminum alloy conductor low voltage cable for photovoltaic applications of claim 1, characterized in that, The pouring layer is a rubber layer.

7. The two-core aluminum alloy conductor low voltage cable for photovoltaic applications of claim 1, characterized in that, The metal shielding net is made of copper or aluminum material.

8. The two-core aluminum alloy conductor low voltage cable for photovoltaic applications of claim 1, characterized in that, The shield layer is further provided with a protective sleeve, and the material of the protective sleeve is PVC or PE.

9. The two-core aluminum alloy conductor low voltage cable for photovoltaic applications of claim 1, characterized in that, A filling layer is arranged between the shield layer and the outer surfaces of the two aluminum alloy wire cores, and the filling layer is a jute cotton rope.

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