EPDM insulated twist-resistant power cable for wind power generation equipment

Abstract

The present invention discloses an ethylene-propylene rubber insulated twist-resistant power cable for wind power generation equipment, comprising a plurality of main line bodies and a protective layer wrapped around the periphery of the main line body, the periphery of the main line body is wrapped with a plurality of fan-shaped filling blocks made of heat-conducting material, the main line body is composed of a PVC protective cover, a non-woven fabric longitudinal sheath and a main body core column, the protective layer is composed of a heat-conducting shielding layer, an insulating shielding layer and a PVC protective shell, the end of the main line body or the connection end connected to other line bodies is directly wrapped with a waterproof layer, the waterproof layer and the protective layer are connected by a protective hose, the surface of the waterproof layer is installed with a connection end shell and a wiring sleeve made of waterproof material side by side, the connection end shell is close to one side of the PVC protective shell, and the connection end shell and the wiring sleeve are tightly connected. The structural design of the present invention is reasonable, and the overall performance of the cable is greatly improved through the waterproof wiring structure and the heat dissipation structure.

Description

Technical Field

[0001] The invention relates to a cable, in particular to an ethylene-propylene rubber insulated torsion-resistant power cable for wind power generation equipment, belonging to the technical field of cable application. Background Art

[0002] A cable is usually a rope-like cable made up of several or several groups of wires (at least two in each group). Each group of wires is insulated from each other and often twisted around a center wire. The entire outside is covered with a highly insulating covering. The cable has the characteristics of being powered inside and insulated outside.

[0003] When the cable is overloaded, due to the thermal effect of the current, the load current will inevitably cause the conductor to heat up when passing through the cable. At the same time, the skin effect of the charge, the eddy current loss of the steel armor, and the insulation medium loss will also generate additional heat, thereby increasing the cable temperature. Traditional cables generally do not have a heat dissipation structure. Under high-load operation, the cable is very easy to be damaged, which usually occurs at the cable joints in direct burial or drainage pipes. For example, if the cable joints are not made properly and are made in humid climate conditions, water will enter the joints or water vapor will mix in. After a period of time, water dendrites will be formed under the action of the electric field, gradually damaging the insulation strength of the cable and causing failures. Therefore, in response to the above problems, an EPDM insulated torsion-resistant power cable for wind power generation equipment is proposed. Summary of the invention

[0004] The purpose of the present invention is to provide an EPDM rubber insulated torsion-resistant power cable for wind power generation equipment in order to solve the above-mentioned problem.

[0005] The present invention achieves the above-mentioned purpose through the following technical scheme: an EPDM rubber insulated torsion-resistant power cable for wind power generation equipment, comprising a plurality of main line bodies and a protective layer wrapped around the periphery of the main line body, the periphery of the main line body is wrapped with a plurality of fan-shaped filling blocks made of heat-conductive material, the main line body is composed of a PVC protective cover, a non-woven fabric longitudinal sheath and a main body core column, the protective layer is composed of a heat-conductive shielding layer, an insulating shielding layer and a PVC protective outer shell, the end of the main line body or the connecting end connected to other line bodies is directly wrapped with a waterproof layer, the waterproof layer and the protective layer are connected by a protective hose, the surface of the waterproof layer is provided with a connecting end shell and a wiring sleeve made of waterproof material installed side by side, the connecting end shell is close to one side of the PVC protective outer shell, and the connecting end shell and the wiring sleeve are tightly connected.

[0006] Preferably, the periphery of the main body core column is wrapped with a non-woven fabric longitudinal layer and a PVC protective cover in sequence, and the non-woven fabric longitudinal layer and the PVC protective cover are tightly connected.

[0007] Preferably, the fan-shaped filling block is tightly fitted between the main line body and the heat-conductive shielding layer.

[0008] Preferably, the outer periphery of the thermally conductive shielding layer is sequentially wrapped with a thermally conductive layer, an insulating shielding layer and a PVC protective shell, and a plurality of heat dissipating fins of annular structures are evenly distributed axially on the surface of the insulating shielding layer.

[0009] Preferably, the surface of the heat dissipating fin is wrapped with a heat dissipating fin protective shell, the material of the heat dissipating fin protective shell is consistent with the material structure of the PVC protective shell, and the PVC protective shell and the heat dissipating fin protective shell are an integrated structure.

[0010] Preferably, the connection end housing is connected to the PVC protective housing via a connection hose made of waterproof material.

[0011] Preferably, the connection end housing and the wiring sleeve are an integrated structure.

[0012] Preferably, a sealing ring tube made of EPDM rubber material and a terminal head mounting groove are sequentially installed on the surface of the wiring sleeve in the axial direction.

[0013] Preferably, the terminal head mounting slot is a terminal head mounting slot having a triangular structure in cross-sectional area.

[0014] Preferably, a heat-conducting layer is installed between the heat-conducting shielding layer and the insulating shielding layer, and the surface of the heat-conducting layer is connected to the end of the heat dissipating fin.

[0015] Preferably, the heat-conducting layer is a heat-conducting layer formed by spirally winding heat-conducting wires.

[0016] The beneficial effects of the present invention are as follows: the present invention has a reasonable structural design, and the overall performance of the cable is greatly improved through the waterproof wiring structure and the heat dissipation structure. The main line body is fixed by the fan-shaped filling block, which improves the compactness of the structure. The heat generated by the heat-conducting layer located between the heat-conducting shielding layer and the insulating shielding layer is conducted to the heat dissipating fins of the annular structure through the heat-conducting layer under the premise of achieving the shielding effect when the cable is working. The heat is extracted through the heat dissipating fins. The heat dissipating fins and the heat-conducting layer constitute a heat dissipation structure, which further improves the heat dissipation performance of the cable without affecting the performance of the cable, and avoids insulation breakdown or even explosion and fire due to excessive cable temperature. The waterproof wiring structure composed of the connection end shell, the wiring sleeve, the waterproof layer and the sealing ring tube made of waterproof material is used to improve the waterproof performance of the cable connection, and further improve the overall performance of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 It is a schematic diagram of the internal cross-sectional structure of the present invention;

[0019] Figure 3It is a schematic diagram of the cross-sectional structure of the connection end of the present invention;

[0020] Figure 4 Schematic diagram of the heat-conducting layer structure of the present invention.

[0021] In the figure: 1. PVC protective cover, 2. non-woven fabric longitudinal wrapping layer, 3. main body core column, 4. fan-shaped filling block, 5. thermal conductive shielding layer, 6. insulating shielding layer, 7. heat sink, 8. PVC protective shell, 801, heat sink protective shell, 9. thermal conductive layer, 10. connecting hose, 11. connecting end shell, 12. wiring sleeve, 13. waterproof layer, 14. sealing ring tube, 15. wiring head mounting slot, 16. protective hose. DETAILED DESCRIPTION

[0022] 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.

[0023] See also Figure 1-4 As shown, an EPDM insulated torsion-resistant power cable for wind power generation equipment includes a plurality of main line bodies and a protective layer wrapped around the outer periphery of the main line body, the outer periphery of the main line body is wrapped with a plurality of fan-shaped filling blocks 4 made of heat-conducting material, the main line body is composed of a PVC protective cover 1, a non-woven fabric longitudinal sheath 2 and a main body core column 3, the protective layer is composed of a heat-conducting shielding layer 5, an insulating shielding layer 6 and a PVC protective shell 8, the end of the main line body or the connection end connected to other line bodies is directly wrapped with a waterproof layer 13, the waterproof layer 13 and the protective layer are connected by a protective hose 16, and a connection end shell 11 and a wiring sleeve 12 made of waterproof material are installed side by side on the surface of the waterproof layer 13, the connection end shell 11 is close to one side of the PVC protective shell 8, and the connection end shell 11 and the wiring sleeve 12 are tightly connected.

[0024] As a technical optimization solution of the present invention, the outer periphery of the main core column 3 is wrapped with a non-woven fabric longitudinal sheath 2 and a PVC protective cover 1 in sequence, and the non-woven fabric longitudinal sheath 5 and the PVC protective cover 1 are tightly connected to improve the structural integrity of the cable.

[0025] As a technical optimization solution of the present invention, the fan-shaped filling block 4 is tightly fitted between the main line body 3 and the heat-conductive shielding layer 5, making the cable structure more compact.

[0026] As a technical optimization solution of the present invention, the outer periphery of the thermal conductive shielding layer 5 is wrapped with an insulating shielding layer 6 and a PVC protective shell 8 in sequence, and a plurality of annular heat dissipating fins 7 are evenly distributed axially on the surface of the insulating shielding layer 6 to improve the structural stability of the cable.

[0027] As a technical optimization solution of the present invention, the surface of the heat dissipation fin 7 is wrapped with a heat dissipation fin protective shell 801. The material of the heat dissipation fin protective shell 801 is consistent with the material structure of the PVC protective shell 8, and the PVC protective shell 8 and the heat dissipation fin protective shell 801 are an integrated structure, which improves the stability of the cable structure.

[0028] As a technical optimization solution of the present invention, the connection end shell 11 is connected to the PVC protective shell 8 through a connection hose 10 made of waterproof material, thereby improving the stability of the cable wiring structure.

[0029] As a technical optimization solution of the present invention, the connection end housing 11 and the wiring sleeve 12 are an integrated structure, which improves the compactness of the cable wiring structure.

[0030] As a technical optimization solution of the present invention, a sealing ring tube 14 made of EPDM rubber material and a terminal head mounting slot 15 are installed in sequence on the surface of the wiring sleeve 12 in the axial direction. The sealing ring tube 14 improves the sealing performance of the wiring structure and prevents water vapor from entering.

[0031] As a technical optimization solution of the present invention, the terminal head mounting slot 15 is a terminal head mounting slot 15 with a triangular structure in cross-sectional area, which is convenient for installing the cable terminal head.

[0032] As a technical optimization solution of the present invention, a heat-conducting layer 9 is installed between the heat-conducting shielding layer 5 and the insulating shielding layer 6, and the surface of the heat-conducting layer 9 is connected to the end of the heat-dissipating fin 7, and a heat-dissipating structure is formed by the heat-conducting layer 9 and the heat-dissipating fin 7.

[0033] As a technical optimization solution of the present invention, the heat-conducting layer 9 is a heat-conducting layer 9 formed by spirally winding heat-conducting wires, which realizes shielding and heat dissipation functions.

[0034] When the present invention is in use, the basic functions of the entire cable are realized through the main body core column 3, the main body core column 3 is fixed by the fan-shaped filling block 4, the waterproof layer 13 wrapped on the surface of the connecting end of the main line body is seamlessly connected to the outer periphery of the protective layer through the protective hose 16, and when wiring, the cable terminal is installed on the surface of the wiring sleeve 12, fixed by the wiring head installation groove 15 on the surface of the wiring sleeve 12, and the sealing of the wiring sleeve 12 and the inner wall of the cable terminal is achieved by the sealing ring tube 14.

[0035] The heat generated by the cable during the power-on process is transferred from the heat-conducting layer 9 to the heat-dissipating fins 7 located on the surface of the insulating shielding layer 6. The heat is conducted out of the cable by the flat and annular heat-dissipating fins 7 to achieve the heat dissipation function.

[0036] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations within the meaning and scope of the elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0037] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An EPDM rubber insulated torsion-resistant power cable for wind power generation equipment, comprising a plurality of main wire bodies and a protective layer wrapped around the outer periphery of the main wire bodies, characterized in that: The main line body is wrapped with a plurality of fan-shaped filling blocks (4) made of heat-conducting material. The main line body is composed of a PVC protective cover (1), a non-woven fabric longitudinal sheath (2) and a main body core column (3). The protective layer is composed of a heat-conducting shielding layer (5), an insulating shielding layer (6) and a PVC protective shell (8). The end of the main line body or the connecting end connected to other line bodies is directly wrapped with a waterproof layer (13). The waterproof layer (13) and the protective layer are connected by a protective hose (16). The surface of the waterproof layer (13) is provided with a connecting end shell (11) and a wiring sleeve (12) made of waterproof material installed side by side. The connecting end shell (11) is close to one side of the PVC protective shell (8), and the connecting end shell (11) and the wiring sleeve (12) are tightly connected. The outer periphery of the heat-conducting shielding layer (5) is sequentially wrapped with an insulating shielding layer (6) and a PVC protective shell (8), and a plurality of heat dissipating fins (7) of annular structures are evenly distributed in the axial direction on the surface of the insulating shielding layer (6); The surface of the heat dissipation fin (7) is wrapped with a heat dissipation fin protective shell (801), the material of the heat dissipation fin protective shell (801) is consistent with the material structure of the PVC protective shell (8), and the PVC protective shell (8) and the heat dissipation fin protective shell (801) are an integrated structure; A heat-conducting layer (9) is installed between the heat-conducting shielding layer (5) and the insulating shielding layer (6), and the surface of the heat-conducting layer (9) is connected to the end of the heat dissipating fin (7).

2. The EPDM insulated twist-resistant power cable for wind power generation equipment according to claim 1, characterized in that: The outer periphery of the main body core column (3) is sequentially wrapped with a non-woven fabric longitudinal wrapping layer (2) and a PVC protective cover (1), and the non-woven fabric longitudinal wrapping layer (2) and the PVC protective cover (1) are tightly connected.

3. The EPDM insulated twist-resistant power cable for wind power generation equipment according to claim 1, characterized in that: The fan-shaped filling block (4) is tightly fitted between the main line body and the heat-conducting shielding layer (5).

4. The EPDM insulated twist-resistant power cable for wind power generation equipment according to claim 1, characterized in that: The connection end housing (11) is connected to the PVC protective housing (8) via a connection hose (10) made of waterproof material.

5. The EPDM insulated twist-resistant power cable for wind power generation equipment according to claim 1, characterized in that: The connection end housing (11) and the wiring sleeve (12) are an integrated structure.

6. The EPDM insulated twist-resistant power cable for wind power generation equipment according to claim 1, characterized in that: A sealing ring tube (14) made of ethylene propylene rubber material and a wiring head mounting groove (15) are sequentially mounted on the surface of the wiring sleeve (12) in the axial direction.

7. The EPDM insulated twist-resistant power cable for wind power generation equipment according to claim 6, characterized in that: The terminal head mounting slot (15) is a terminal head mounting slot (15) having a triangular cross-sectional area.

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