A high and low temperature resistant light medium and high voltage power cable

Abstract

The utility model relates to a high and low temperature resistant wiring type light medium and high voltage power cable, which includes: a flat cable, which includes a plurality of cable cores arranged side by side; scattered wires, which are separated and extended from a plurality of cable cores arranged side by side at both ends of the flat cable, and the ends of the scattered wires at both ends of the flat cable are respectively provided with wire noses; wherein the cable core includes: a carbon fiber reinforcement core located on both sides; and yellow, green, and red medium and high voltage power cable phase lines arranged in the middle; the carbon fiber reinforcement core and the yellow, green, and red medium and high voltage power cable phase lines are connected by a silicone rubber sheath; the phase line includes: a conductor; an inner shielding layer, which is coated on the conductor; an insulating layer, which is coated on the inner shielding layer; an outer shielding layer, which is coated on the insulating layer; and a copper tape shielding layer, which is coated on the outer shielding layer. The utility model is convenient for wiring, occupies a small space, and has small interference between cables.

Description

Technical Field

[0001] The utility model relates to the field of cables, in particular to a high and low temperature resistant wiring type light medium and high voltage power cable. Background Art

[0002] For example, Chinese utility model patent announcement number CN202488624U discloses a cable group that is easy to manage and install, which includes a cable group composed of several cables and a cable holder. The cables are arranged in parallel and the lengths increase successively. The top connectors of several cables are plugged into the cable holder. The cable holder is provided with several slots that are compatible with the top connectors of the cables. There are often multiple independent cables in the cable line, which are numerous and complicated when wiring, occupy a large space, and are prone to interference between the cables. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a high and low temperature resistant wiring type light medium and high voltage power cable, which is convenient for wiring, occupies a small space, has little interference between cables, and is light in weight.

[0004] In order to solve the above problems, a high and low temperature resistant wiring type light medium and high voltage power cable is adopted, which includes:

[0005] A flat cable comprising a plurality of cable cores arranged side by side;

[0006] The scattered wires are separated from and extend from a plurality of cable cores arranged side by side at both ends of the flat cable, and the ends of the scattered wires at both ends of the flat cable are provided with wire noses respectively;

[0007] The cable core includes:

[0008] Carbon fiber reinforced cores on both sides;

[0009] And the yellow, green and red medium and high voltage power cable phase lines arranged in the middle;

[0010] The carbon fiber reinforced core and the yellow, green and red medium and high voltage power cable phase lines are connected through a silicone rubber sheath;

[0011] The phase line comprises:

[0012] conductor;

[0013] An inner shielding layer, which is wrapped around the conductor;

[0014] an insulating layer covering the inner shielding layer;

[0015] An outer shielding layer, which is coated on the insulating layer;

[0016] Copper tape shielding layer, which is wrapped over the outer shielding layer.

[0017] As a further improvement of the utility model, the inner shielding layer is made of a semi-conductive polytetrafluoroethylene film.

[0018] As a further improvement of the utility model, the insulating layer adopts a polyperfluoroethylene propylene layer.

[0019] As a further improvement of the utility model, the outer shielding layer is made of semi-conductive polytetrafluoroethylene film (PTFE semi-conductive film).

[0020] As a further improvement of the utility model, the carbon fiber reinforced core is stripped of the 50 mm long silicone rubber sheath and then reliably crimped with the wire nose; and the length of the carbon fiber reinforced core at the scattered line position should be more than 200 mm shorter than the phase line length.

[0021] As a further improvement of the utility model, for the phase line at the scattered line position, 150mm silicone rubber sheath, copper tape shielding layer and outer shielding layer are stripped at the end, and then the insulating layer is sharpened into a pencil shape in a 100mm section from the root of the stripped outer shielding layer to the end direction.

[0022] As a further improvement of the utility model, the silicone rubber sheath forms connecting ribs between the carbon fiber reinforcement core and the phase line, and between adjacent phase lines.

[0023] The utility model has the advantages of convenient wiring, small space occupation, small interference between cables, light weight, small size, high and low temperature resistance, relatively small transmission power loss, simple laying and high tensile strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of an embodiment.

[0025] Figure 2 Schematic diagram of a cutaway section of an embodiment.

[0026] Figure numerals: 1, conductor; 2, inner shielding layer; 3, insulation layer; 4, outer shielding layer; 5, copper tape shielding layer; 6, silicone rubber sheath; 7, carbon fiber reinforcement core; 8, wire nose; 9, flat cable. DETAILED DESCRIPTION

[0027] 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 of 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.

[0028] In the description of the present utility model, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model; the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance; in addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a communication between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0029] Example 1

[0030] like Figure 1 As shown, a high and low temperature resistant light medium and high voltage power cable is arranged. In this embodiment, three medium and high voltage phase lines with the same function and two carbon fiber reinforced cores 7 with the same function are arranged in a row and extruded through a flattening die for a one-time sheath to form a flat cable 9. Then, according to the user terminal assembly requirements for the length of the scattered line segment, the flat cable is cut in the middle along the tangent connecting ribs between the phase line and the phase line, and between the phase line and the carbon fiber reinforced core 7, and the scattered lines at both ends are crimped with corresponding specification wire noses 8.

[0031] The phase line structure of the medium and high voltage power cable is: outside the conductor 1 there are a semi-conductive polytetrafluoroethylene inner shielding layer 2, a polyperfluoroethylene propylene insulation layer 3, a semi-conductive polytetrafluoroethylene outer shielding layer 4, and a copper tape shielding layer 5 in sequence.

[0032] The cross-sectional structure of the flat cable is: 3 medium and high voltage power cable phase lines with inner shielding layer 2, insulating layer 3, outer shielding layer 4, copper tape shielding layer 5, colors of yellow, green and red respectively, 2 carbon fiber reinforcement cores 7 and silicone rubber sheath 6.

[0033] Example 2

[0034] Based on the high and low temperature resistant flat-line light medium and high voltage power cable described in Example 1, the phase line structure of the scattered line segments at both ends is as follows: stripping off the 150mm long phase line silicone rubber sheath 6, copper tape shielding layer 5 and semi-conductive polytetrafluoroethylene outer shielding layer 4, and then stripping off the outer shielding layer from the root to the end direction 100mm section, and shaving the insulating layer 3 into a pencil shape to prevent the cable cross-section from creeping to the conductor 1 and the outer shielding layer and causing a short circuit, and stripping off the phase line related structural layer 50mm section at the end to enable the conductor 1 to be reliably crimped with the corresponding specification wire nose 8.

[0035] Example 3

[0036] Based on the high and low temperature resistant light medium and high voltage power cable described in Example 1, the structure of the carbon fiber reinforced core of the scattered wire segments at both ends is as follows: after stripping off the 50mm long silicone rubber sheath 6, the carbon fiber reinforced core 7 is reliably crimped with the corresponding specification wire nose 8. In order to avoid stress on the yellow, green and red phase lines, the length of the carbon fiber reinforced core 7 of the scattered wire segments at both ends should be more than 200mm shorter than the length of the phase line.

[0037] This embodiment is an optimization and upgrade of the common medium and high voltage power cables of 3.6 / 6KV to 26 / 35KV in the GB / T 12706 standard, which are not resistant to high temperatures, have large transmission power losses, are heavy, have large dimensions, and have high laying costs. It is particularly suitable for thermal power stations and power transmission and distribution lines in northern regions with large temperature differences between day and night.

[0038] This cable has a high insulation voltage level (breakdown voltage is more than twice that of cross-linked polyethylene), high tensile strength and low density of the reinforcing core (strength is twice that of steel wire, but density is only 1 / 4 of steel wire), and adopts a flattened cable design. Therefore, it has the following outstanding advantages:

[0039] Light weight: Under the same voltage level and specification (current carrying capacity), the cable weight is more than 30% lighter than ordinary medium and high voltage power cables;

[0040] Small size: Under the same voltage level and specification (current carrying capacity), the cable size occupies only about 60% of the space of ordinary medium and high voltage power cables;

[0041] High temperature resistance: long-term use temperature can reach -65℃~200℃;

[0042] Small transmission power loss: Under the same voltage level and specification (current carrying capacity), due to the high heat resistance level of the insulation layer, its transmission power loss is about 5% lower than that of ordinary medium and high voltage power cables.

[0043] Easy to lay: Due to its relatively smaller size and lighter weight, the cable has lower site requirements whether it is laid horizontally or vertically, and the laying is more labor-saving.

[0044] High tensile strength: Carbon fiber twisted core is used as the reinforcing core, and its tensile strength is more than twice that of the armored steel wire in ordinary medium and high voltage power cables.

[0045] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For technicians in the technical field to which the present invention belongs, several equivalent substitutions or obvious variations can be made without departing from the concept of the present invention, and the performance or use is the same, which should be regarded as belonging to the protection scope of the present invention.

Claims

1. A high and low temperature resistant light medium and high voltage power cable, characterized in that include: A flat cable (9) comprising a plurality of cable cores arranged side by side; Loose wires, which are separated from and extend from a plurality of cable cores arranged side by side at both ends of the flat cable (9), and the ends of the loose wires at both ends of the flat cable (9) are respectively provided with wire noses (8); The cable core includes: Carbon fiber reinforcement cores (7) located on both sides; And the yellow, green and red medium and high voltage power cable phase lines arranged in the middle; The carbon fiber reinforced core (7) and the yellow, green and red medium and high voltage power cable phase lines are connected via a silicone rubber sheath (6); The phase line comprises: Conductor (1); An inner shielding layer (2) covering the conductor (1); An insulating layer (3) covering the inner shielding layer (2); An outer shielding layer (4) coated on the insulating layer (3); A copper tape shielding layer (5) is coated on the outer shielding layer (4).

2. According to claim 1, the high and low temperature resistant light medium and high voltage power cable is characterized in that The inner shielding layer (2) is made of a semi-conductive polytetrafluoroethylene film.

3. The high and low temperature resistant light medium and high voltage power cable according to claim 1 is characterized in that The insulating layer (3) is a poly(fluoroethylene propylene) layer.

4. The high and low temperature resistant light medium and high voltage power cable according to claim 1 is characterized in that The outer shielding layer (4) is made of a semi-conductive polytetrafluoroethylene film.

5. The high and low temperature resistant light medium and high voltage power cable according to claim 1 is characterized in that The carbon fiber reinforced core (7) is stripped of the 50 mm long silicone rubber sheath (6) and then reliably crimped with the wire nose (8); and the length of the carbon fiber reinforced core (7) at the scattered line position should be at least 200 mm shorter than the phase line length.

6. The high and low temperature resistant wiring type light medium and high voltage power cable according to claim 1 is characterized in that For the phase line at the scattered line position, the 150 mm silicone rubber sheath (6), the copper tape shielding layer (5) and the outer shielding layer (4) are stripped off at the end, and then the insulating layer (3) is shaved into a pencil shape in a 100 mm section from the root of the stripped outer shielding layer (4) to the end.

7. The high and low temperature resistant light medium and high voltage power cable according to claim 1 is characterized in that The silicone rubber sheath (6) forms connecting ribs between the carbon fiber reinforcement core (7) and the phase line, and between adjacent phase lines.

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