CN211045099U

CN211045099U - Special photovoltaic cable

Info

Publication number: CN211045099U
Application number: CN201922105210.8U
Authority: CN
Inventors: 肖强; 祝关平
Original assignee: Tongling Tongquan Cable Wire Co ltd
Current assignee: Tongling Tongquan Cable Wire Co ltd
Priority date: 2019-11-29
Filing date: 2019-11-29
Publication date: 2020-07-17
Anticipated expiration: 2029-11-29

Abstract

The utility model belongs to the technical field of communication transmission equipment, in particular to a photovoltaic special cable, which comprises an outer sheath and a plurality of groups of cables arranged inside the outer sheath, an inner sheath is arranged between the outer sheath and the cables, a hollow inflation cavity is arranged between the inner sheath and the outer sheath, four groups of support bars distributed in an array are fixedly arranged in the inflation cavity, two ends of each support bar are respectively and fixedly connected with the outer sheath and the inner sheath, the support bars are arranged along the length direction of the outer sheath, a plurality of air vents are arranged on the support bars, the air vents penetrate through the support bars in the direction perpendicular to the support bars, the outer sheath is connected with an inflation tube which penetrates through the outer sheath and the inflation cavity, an inflation valve is arranged on the inflation tube, the defects of the prior art are overcome, the inflation cavity is arranged in the cable, and inert gas is injected into the, the problems of high cost and difficult transportation and installation of metal armor are avoided.

Description

Special photovoltaic cable

Technical Field

The utility model belongs to the technical field of communication transmission equipment, concretely relates to photovoltaic special cable.

Background

The conductor part of the photovoltaic cable, namely the photovoltaic special cable, is a copper conductor or a tinned copper conductor, the insulating layer is radiation cross-linked polyolefin insulation, and the sheath is radiation cross-linked polyolefin insulation. A large number of direct current cables in a photovoltaic power station need to be laid outdoors, the environmental conditions are severe, the cable materials are determined according to the conditions of ultraviolet resistance, ozone resistance, severe temperature change and chemical erosion, and the direct current cables need to be moisture-proof, insolation-proof, cold-resistant, heat-resistant and ultraviolet-resistant, and also need to be acid-alkali-resistant and other chemical substances in certain special environments.

For the mechanical strength who promotes the cable, current cable adopts the steel wire armor in its inside, but this kind of structure can let the increase of the self gravity of cable, and this kind of setting has improved the manufacturing cost of cable on the one hand, and on the other hand steel wire armor's cable bending ability is poor, causes transportation, the installation of cable inconvenient.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a photovoltaic special cable has overcome the not enough of prior art, sets up in the cable and aerifys the chamber, thereby to aerifing the intensity that the intracavity pours into inert gas into and promoted the cable, has avoided the problem of metal armor with high costs, transportation installation difficulty.

In order to solve the above problems, the utility model adopts the following technical proposal:

a photovoltaic special cable comprises an outer sheath and a plurality of groups of cables arranged inside the outer sheath, wherein an inner sheath is arranged between the outer sheath and the cables, a hollow inflation cavity is arranged between the inner sheath and the outer sheath, four groups of support bars distributed in an array mode are fixedly arranged in the inflation cavity, two ends of each support bar are fixedly connected with the outer sheath and the inner sheath respectively, the support bars are arranged along the length direction of the outer sheath, a plurality of air holes are formed in the support bars, the air holes penetrate through the support bars in the direction perpendicular to the support bars, an inflation tube penetrating through the outer sheath and communicated with the inflation cavity is connected onto the outer sheath, an inflation valve is installed on the inflation tube, and inert gas is filled in the inflation cavity; the inboard of inner sheath is provided with the tensile layer, tensile layer inside is provided with the elastic locating component of fixed cable.

Furthermore, the outside of gas tube sets firmly annular connecting block, the connecting block is located the side that inflation valve is close to the oversheath, the outside of connecting block is provided with the external screw thread, the outside of gas tube is provided with the protecting crust, the open end inboard of protecting crust is provided with the internal thread, the protecting crust passes through screw thread fixed connection with the connecting block.

Furthermore, a sealing ring is arranged at the joint of the protective shell and the inflation tube and is bonded on the inner side wall of the protective shell.

Further, the elastic positioning assembly mainly comprises an elastic supporting pad arranged at the center of the inner part of the tensile layer and an protective layer tightly attached to the inner side of the tensile layer, the outer surface of the elastic supporting pad is tightly attached to the outer surface of the cable, a groove corresponding to the cable is formed in the protective layer, and the cable is located in the groove.

Furthermore, the tensile layer is formed by weaving copper wires and fiber wires which are used as materials, the diameters of the copper wires and the fiber wires are the same, the number of the ingots is the same, the weaving directions of the tinned copper wires and the fiber wires are opposite, and the weaving density is not less than 90%.

Furthermore, four protection strips are uniformly arranged on the outer side of the outer sheath, the protection strips are arranged along the length direction of the outer sheath, and the cross section of each protection strip is arc-shaped or semicircular.

Compared with the prior art, the utility model, following beneficial effect has:

a photovoltaic private cable is through setting up oversheath, inner sheath, inflatable chamber, support bar, air vent, gas tube, inflation valve door, protecting crust, connecting block and sealing washer. The support bars are used for supporting and limiting the size of the inflation cavity, and inert gas is injected into the inflation cavity through the inflation tube, so that the strength of the cable is improved; through setting up tensile layer, inoxidizing coating, recess, elastic support pad and protective strip, the tensile layer promotes the intensity of cable, and inoxidizing coating and elastic support pad promote the resistance to compression buffer capacity of cable, and the protective strip protection oversheath improves the life of cable.

The utility model discloses structural design is novel, and easy operation is convenient, sets up in the cable and aerifys the chamber, thereby pours into inert gas into to aerifing the intracavity and promoted the intensity of cable, has avoided the problem that metal armor is with high costs, transportation installation difficulty, sets up elasticity protection component simultaneously and protects the cable.

Drawings

Fig. 1 is a schematic structural diagram of a photovoltaic special cable.

Fig. 2 is an enlarged schematic view of a photovoltaic private cable at a.

In the figure: 1. an outer sheath; 2. a cable; 3. an inner sheath; 4. an inflation cavity; 5. a supporting strip; 6. a vent hole; 7. a tensile layer; 8. a protective layer; 9. a groove; 10. an elastic support pad; 11. a protective strip; 12. an inflation tube; 13. an inflation valve; 14. a protective shell; 15. connecting blocks; 16. and (5) sealing rings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in figures 1-2, the utility model relates to a photovoltaic special cable, including oversheath 1 and the multiunit cable 2 of setting in the oversheath 1, be provided with inner sheath 3 between oversheath 1 and cable 2, be provided with hollow inflation chamber 4 between inner sheath 3 and the oversheath 1, four groups array distribution's support bar 5 has set firmly in inflation chamber 4, the both ends of support bar 5 are respectively with oversheath 1 and inner sheath 3 fixed connection, support bar 5 sets up along the length direction of oversheath 1, be provided with a plurality of air vents 6 on the support bar 5, air vent 6 runs through support bar 5 in the direction perpendicular to support bar 5, be connected with on the oversheath 1 and run through the gas tube 12 of oversheath 1 with inflation chamber 4 intercommunication, install the inflation valve on gas tube 12, the inflation valve adopts the valve that automobile tire used, have the effect of restricting the gas outflow in inflation chamber 4, the inflation cavity 4 is filled with inert gas; the inboard of inner sheath 3 is provided with tensile layer 7, and tensile layer 7 is inside to be provided with the elastic locating component of fixed cable 2.

The outer side of the inflation tube 12 is fixedly provided with an annular connecting block 15, the connecting block 15 is positioned on one side of the inflation valve close to the outer sheath 1, the outer side of the connecting block 15 is provided with external threads, the outer side of the inflation tube 12 is provided with a protective shell 14, the inner side of the opening end of the protective shell 14 is provided with internal threads, the protective shell 14 is fixedly connected with the connecting block 15 through threads, and thus the protective shell 14 is movably connected with the outer sides of the inflation tube 12 and the inflation valve, the inflation tube 12 and the inflation valve are prevented from being corroded, the service life of a cable is prolonged, and the maintenance cost is reduced.

The sealing ring 16 is arranged at the joint of the protective shell 14 and the gas-filled tube 12, and the sealing ring 16 is bonded on the inner side wall of the protective shell 14, so that the problem of gas leakage of the gas-filled tube 12 is avoided.

Elastic locating component is mainly including setting up elastic support pad 10 and the inseparable inoxidizing coating 8 of laminating in tensile layer 7 inboard of tensile layer 7 at the inside center department of tensile layer 7, and elastic support pad 10's surface closely laminates with the surface of cable 2, is provided with the recess 9 that corresponds with cable 2 on the inoxidizing coating 8, and cable 2 is located recess 9, utilizes elastic locating component to fix cable 2, avoids mechanical extrusion, collision to cause the harm to cable 2 simultaneously.

Tensile layer 7 adopts copper wire and cellosilk to weave for the material and forms, and the diameter of copper wire and cellosilk is the same, the spindle number is the same, and the direction of weaving of tinned copper wire and cellosilk is opposite, and it is not less than 90% to weave density, and the metal of tensile layer 7 is woven and is set up the bulk strength that has promoted the cable, has reduced the weight of cable simultaneously, still convenient bending.

The outer side of the outer sheath 1 is uniformly provided with four protection strips 11, the protection strips 11 are arranged along the length direction of the outer sheath 1, the cross sections of the protection strips 11 are arc-shaped or semicircular, the protection strips 11 protruding out of the outer sheath 1 can protect the outer sheath 1 from being abraded, and the service life of the cable is prolonged.

To sum up, the utility model relates to a photovoltaic special cable, before the installation, aerify in the inflation chamber 4, twine the cable bending disk on the material roller, after accomplishing the installation of cable, unscrew the protective housing, connect inflation equipment with gas tube 12, inject inert gas into inflation chamber 4 through gas tube 12, inert gas makes it fill up whole inflation chamber 4 through air vent 6 on the supporting shoe, then disconnect inflation equipment, cover protective housing 14 again and screw up; when the maintenance and the replacement are needed, the inflation valve is opened, and the inert gas in the inflation cavity 4 is exhausted.

When the cable is extruded by external force, the outer sheath 1, the gas in the inflation cavity 4, the inner sheath 3, the protective layer 8 and the elastic supporting pad 10 are used for carrying out compression-resistant buffering step by step, the outer sheath 1, the inflation cavity 4 and the inner sheath 3 protect the inner tensile layer 7 and the inner cable 2 from being extruded and deformed by the external force, and the protective layer 8 and the elastic supporting pad 10 fix the cable 2 for absorbing energy and improving the internal compression-resistant capability; the tensile layer 7 is arranged on the inner side of the inner sheath 3, so that the tensile strength and the compressive strength of the cable are improved, the mechanical performance of the cable is improved, and the service life of the cable is prolonged.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a photovoltaic special cable, includes the oversheath and sets up the inside multiunit cable of oversheath, its characterized in that: an inner sheath is arranged between the outer sheath and the cable, a hollow inflation cavity is arranged between the inner sheath and the outer sheath, four groups of support bars distributed in an array mode are fixedly arranged in the inflation cavity, two ends of each support bar are fixedly connected with the outer sheath and the inner sheath respectively, the support bars are arranged along the length direction of the outer sheath, a plurality of vent holes are formed in the support bars, the vent holes penetrate through the support bars in the direction perpendicular to the support bars, an inflation pipe penetrating through the outer sheath and communicated with the inflation cavity is connected to the outer sheath, an inflation valve is installed on the inflation pipe, and inert gas is filled in the inflation cavity; the inboard of inner sheath is provided with the tensile layer, tensile layer inside is provided with the elastic locating component of fixed cable.

2. The special photovoltaic cable according to claim 1, wherein: the outer side of the inflation tube is fixedly provided with an annular connecting block, the connecting block is positioned on one side, close to the outer sheath, of the inflation valve, external threads are arranged on the outer side of the connecting block, a protective shell is arranged on the outer side of the inflation tube, internal threads are arranged on the inner side of the opening end of the protective shell, and the protective shell is fixedly connected with the connecting block through threads.

3. The photovoltaic special cable according to claim 2, characterized in that: the protective shell is provided with a sealing ring at the joint of the protective shell and the inflation tube, and the sealing ring is bonded on the inner side wall of the protective shell.

4. The special photovoltaic cable according to claim 1, wherein: the elastic positioning assembly mainly comprises an elastic supporting pad and an protective layer, wherein the elastic supporting pad is arranged at the center of the inner part of the tensile layer, the protective layer is tightly attached to the inner side of the tensile layer, the outer surface of the elastic supporting pad is tightly attached to the outer surface of the cable, a groove corresponding to the cable is formed in the protective layer, and the cable is located in the groove.

5. The photovoltaic special cable according to claim 4, wherein: the tensile layer is formed by weaving copper wires and fiber wires, the diameters of the copper wires and the fiber wires are the same, the number of the ingots is the same, the weaving directions of the tinned copper wires and the fiber wires are opposite, and the weaving density is not less than 90%.

6. The special photovoltaic cable according to any one of claims 1 to 5, wherein: four protection strips are uniformly arranged on the outer side of the outer sheath, the protection strips are arranged along the length direction of the outer sheath, and the cross section of each protection strip is arc-shaped or semicircular.