Direct-current remote supply cable

Abstract

The utility model relates to the technical field of power cables, and particularly discloses a direct current remote supply cable, which sequentially comprises a cable core, an inner protective layer, an armor layer and an outer protective layer from inside to outside, the cable core is formed by combining a reinforcing core, four groups of conductors and a filling part, the conductors are equidistantly distributed on the side wall of the reinforcing core, the conductors and the reinforcing core are positioned inside the filling part, and the outer protective layer is arranged on the outer protective layer. The outer wall of the conductor is sleeved with an insulating part. According to the utility model, through the arrangement of the reinforcing core and the armor layer, the structural strength of the cable can be enhanced, so that the cable can bear external tension, extrusion force and other mechanical stresses, thereby prolonging the service life of the cable, and avoiding exposure or damage of the internal insulating layer caused by external force of the cable.

Description

Technical Field

[0001] The utility model belongs to the technical field of power cables, and in particular relates to a direct current remote supply cable. Background Art

[0002] The basic power supply used by the DC remote power supply system is a DC -48V power supply system with battery protection in the computer room. The -48V is boosted to a 100-380V DC voltage that is suspended and isolated from the ground through the local power supply (the purpose is to reduce line loss). The DC power supply is transmitted over long distances through cables, monitored by the remote power protection, and converted to -48V DC at the remote end to power the load equipment. The power supply head of the DC remote supply is a standard and regulated -48V power supply in the computer room, which is completely isolated from the mains, does not form a loop when suspended from the ground, has no risk of leakage, and has strong power supply independence.

[0003] Cables laid in the air will be corroded by rain, which will cause the cables to age over time. At the same time, in the cold winter environment, the protective layer on the outside of the cable core may become fragile due to the low temperature and easily damaged by external forces, which will cause the insulation layer inside the cable to be exposed or damaged, reducing the service life of the cable. Utility Model Content

[0004] The utility model aims to provide a DC long-distance power supply cable to solve the problem in the prior art that in a cold winter environment, the protective layer outside the cable core may become fragile due to the low temperature and easily damaged by external forces, thereby causing the insulation layer inside the cable to be exposed or damaged.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A DC long-distance power supply cable comprises, from the inside to the outside, a cable core, an inner protective layer, an armor layer and an outer protective layer. The cable core is composed of a reinforcing core, a conductor and a filling part. The conductor is provided in four groups and is equidistantly distributed on the side wall of the reinforcing core. The conductor and the reinforcing core are both located inside the filling part. The outer wall of the conductor is sleeved with an insulating part.

[0007] Preferably, the inner protective layer comprises a wrapping layer and an inner protective layer, the outer wall of the filling portion is provided with a wrapping layer, the outer wall of the wrapping layer is sleeved with the inner protective layer, and the outer wall of the inner protective layer is sleeved with the first fireproof layer.

[0008] Preferably, the armor layer is made of metal wire.

[0009] Preferably, the outer protective layer comprises an outer protective layer and a protective layer, the outer protective layer is sleeved on the outside of the armor layer, and the outer wall of the outer protective layer is coated with a waterproof layer.

[0010] Preferably: the reinforcing core is made of stainless steel wire.

[0011] Preferably, the filling part is made of silica gel material.

[0012] Preferably, the inner protective layer and the outer protective layer are made of rubber material.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. The utility model can enhance the structural strength of the cable by providing a reinforcing core and an armor layer, so that the cable can withstand external tension, extrusion and other mechanical stresses, thereby extending the service life of the cable and preventing the internal insulation layer of the cable from being exposed or damaged by external forces.

[0015] 2. The utility model can effectively prevent water and moisture from penetrating into the interior of the cable by coating a waterproof layer on the surface of the outer protective layer, delaying the aging of the cable, thereby extending its service life and improving its performance and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall main structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the partial cross-sectional structure of the outer protective layer of the utility model;

[0018] Figure 3 It is a schematic diagram of the overall left-side planar structure of the utility model.

[0019] In the figure: 1. cable core; 11. reinforcing core; 12. conductor; 121. insulating part; 13. filling part; 2. inner protective layer; 21. wrapping layer; 22. inner protective layer; 23. first fireproof layer; 3. armor layer; 4. outer protective layer; 41. outer protective layer; 42. waterproof layer. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Reference Figure 1-Figure 3As shown, the utility model provides a DC long-distance power supply cable, which includes a cable core 1, an inner protective layer 2, an armor layer 3 and an outer protective layer 4 from the inside to the outside. The cable core 1 is composed of a reinforcing core 11, a conductor 12 and a filling part 13. The conductor 12 is provided with four groups and is equidistantly distributed on the side wall of the reinforcing core 11. The conductor 12 and the reinforcing core 11 are both located inside the filling part 13. The outer wall of the conductor 12 is sleeved with an insulating part 121. The filling part 13 wraps the conductor 12 and the reinforcing core 11 and fills the gap between them to provide additional support and protection. In this way, the conductor 12 and the reinforcing core 11 are tightly combined with the filling part 13 to form a complete cable core 1 structure with good insulation performance and resistance to external stress.

[0022] In a further embodiment, referring to Figure 3 The inner protective layer 2 includes a wrapping layer 21 and an inner protective layer 22. The outer wall of the filling portion 13 is provided with the wrapping layer 21. The outer wall of the wrapping layer 21 is sleeved with the inner protective layer 2. The outer wall of the inner protective layer 2 is sleeved with the first fireproof layer 23.

[0023] In this embodiment, the wrapping layer 21 can provide additional mechanical protection to protect the conductor 12 and the insulation layer inside the cable from external physical damage, such as stretching, extrusion or bending. Together with the first fireproof layer 23, the fireproof layer can form an isolation layer when a fire occurs, thereby protecting the conductor 12, the insulation layer and other components inside the cable from direct damage by the heat and flames of the fire, thereby extending the fire resistance time of the cable.

[0024] In a further embodiment, referring to Figure 1-Figure 3 , the armor layer 3 is made of metal wire.

[0025] In this embodiment, the armor layer 3 is made of metal wire to enhance the structural strength of the cable, so that it can withstand external tension, extrusion and other mechanical stresses, thereby extending the service life of the cable and preventing the internal insulation layer of the cable from being exposed or damaged by external forces.

[0026] In a further embodiment, referring to Figure 3 The outer protective layer 4 includes an outer protective layer 41 and a protective layer. The outer protective layer 41 is sleeved on the outside of the armor layer 3, and the outer wall of the outer protective layer 41 is coated with a waterproof layer 42.

[0027] In this embodiment, by coating the waterproof layer 42 on the surface of the outer protective layer 41, water and moisture can be effectively prevented from penetrating into the interior of the cable, delaying the aging of the cable, thereby extending its service life and improving its performance and safety.

[0028] In a further embodiment, referring to Figure 1-Figure 3 , the reinforcing core 11 is made of stainless steel wire.

[0029] In this embodiment, the stainless steel wire has high tensile strength and bending resistance, which can effectively increase the load-bearing capacity of the cable, improve its tensile resistance, and prevent the cable from being broken or bent during use.

[0030] In a further embodiment, referring to Figure 1-Figure 3 The filling part 13 is made of silica gel material.

[0031] In this embodiment, the silica gel can effectively improve the waterproof performance of the cable when filling the inside of the cable, and can also maintain stable performance at high temperatures.

[0032] In a further embodiment, referring to Figure 3 The inner protective layer 22 and the outer protective layer 41 are made of rubber material.

[0033] In this embodiment, the inner protective layer 22 and the outer protective layer 41 made of rubber material can provide the cable with good insulation, wear resistance, corrosion resistance, flexibility, waterproof and other properties, protect the internal structure of the cable, extend the service life of the cable, and improve the reliability and stability of the cable system.

[0034] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A DC remote power supply cable, characterized in that: The invention comprises, from the inside to the outside, a cable core (1), an inner protective layer (2), an armor layer (3) and an outer protective layer (4); the cable core (1) is composed of a reinforcing core (11), a conductor (12) and a filling part (13); four groups of the conductor (12) are arranged and are equidistantly distributed on the side wall of the reinforcing core (11); the conductor (12) and the reinforcing core (11) are both located inside the filling part (13); and the outer wall of the conductor (12) is sleeved with an insulating part (121).

2. A DC remote power supply cable according to claim 1, characterized in that: The inner protective layer (2) comprises a wrapping layer (21) and an inner protective layer (22); the outer wall of the filling portion (13) is provided with the wrapping layer (21); the outer wall of the wrapping layer (21) is sleeved with the inner protective layer (2); and the outer wall of the inner protective layer (2) is sleeved with a first fireproof layer (23).

3. A DC remote power supply cable according to claim 1, characterized in that: The armor layer (3) is made of metal wire.

4. A DC remote power supply cable according to claim 1, characterized in that: The outer protective layer (4) comprises an outer protective layer (41) and a protective layer. The outer side of the armor layer (3) is sleeved with the outer protective layer (41), and the outer wall of the outer protective layer (41) is coated with a waterproof layer (42).

5. A DC remote power supply cable according to claim 1, characterized in that: The reinforcing core (11) is made of stainless steel wire.

6. A DC remote power supply cable according to claim 1, characterized in that: The filling part (13) is made of silica gel material.

7. A DC remote power supply cable according to claim 2, characterized in that: The inner protective layer (22) and the outer protective layer (41) are made of rubber material.

Images