CN213988352U - High-modification medium-voltage power cable - Google Patents

Abstract

The utility model discloses a high modified middling pressure power cable, its technical scheme main points are: including the cable core, the outer end of cable core is provided with the insulating layer, the outer end of insulating layer is provided with first fire-retardant layer, first fire-retardant layer uses the asbestos to weave and forms, the outer end on first fire-retardant layer is provided with the fire-retardant layer of second, the fire-retardant layer of second uses the aluminium foil to make, the outer end on the fire-retardant layer of second sets up the tensile layer, the outer end on tensile layer is provided with the outer protective layer, be provided with the wearing layer in the outer protective layer, the wearing layer uses nylon fiber rope to weave and forms, the outer end of outer protective layer is fixed to set up a plurality of sand grips, the inside of sand grip is fixed to be provided with and strengthens the core, it is formed by stranded steel wire transposition to strengthen the core, the utility model discloses good wear resistance and fire behaviour have when using.

Description

High-modification medium-voltage power cable

Technical Field

The utility model relates to a power cable technical field, in particular to high modified middling pressure power cable.

Background

The power cable is used for transmitting and distributing electric energy, and is commonly used for urban underground power grids, power station leading-out lines, power supply inside industrial and mining enterprises and power transmission lines under river-crossing seawater. In the power lines, the cable is increasing in specific gravity. Power cables are cable products used in the trunk lines of power systems to transmit and distribute high power electrical energy, including various voltage classes, 1-500KV and above, and various insulated power cables.

The existing power cable is usually wound on a winder before being laid, when the existing power cable is laid, a worker holds one end of the power cable to drag the power cable from the winder, and in the dragging process, the power cable can directly contact the ground, so that the outer protective layer of the power cable is abraded, and the existing power cable is poor in abrasion resistance; meanwhile, when the existing power cable is used, the flame retardant effect is poor, so that the communication and the electric power are difficult to ensure the safe and smooth communication under the condition of fire, and a new technical scheme is needed to solve the problems.

SUMMERY OF THE UTILITY MODEL

To the problem of mentioning in the background art, the utility model aims at providing a high modified middling pressure power cable to solve the current poor and the poor problem of flame retardant efficiency of power electricity wear resistance who mentions in the background art.

The above technical purpose of the present invention can be achieved by the following technical solutions: the utility model provides a high modified middling pressure power cable, includes the cable core, the outer end of cable core is provided with the insulating layer, the outer end of insulating layer is provided with first fire-retardant layer, first fire-retardant layer uses the asbestos to weave and forms, the outer end of first fire-retardant layer is provided with the fire-retardant layer of second, the fire-retardant layer of second uses the aluminium foil to make, the outer end of the fire-retardant layer of second sets up the tensile layer, the outer end of tensile layer is provided with the outer protective layer, be provided with the wearing layer in the outer protective layer, the wearing layer uses nylon fiber rope to weave and forms, the outer end of outer protective layer is fixed and is set up a plurality of sand grips, the inside of sand grip is fixed to be provided with and strengthens the core, it forms by the stranded steel wire transposition to strengthen the core.

Further, an inorganic paper rope is filled between the first flame-retardant layer and the second flame-retardant layer.

Through the technical scheme, when the cable is used, the cable is ensured to have better roundness, the flame-retardant level of the cable can be improved, the relative position of the cable core in the cable is stable, and the tensile strength of the cable can be increased

Further, the tensile layer is woven by using glass fiber ropes, and the weaving density of the tensile layer is not less than 90%.

Through above-mentioned technical scheme, glass fiber rope has higher mechanical strength, can further increase the tensile strength of cable.

Furthermore, the outer protective layer is made of silicon rubber.

Through the technical scheme, the silicon rubber is soft in texture, has good wear resistance and good electrical insulation property, and is an excellent cable sheath material.

Further, the outer surface of the second flame-retardant layer is coated with a thermal insulation coating.

Through the technical scheme, the heat insulation coating is the composite magnesium aluminum silicate heat insulation coating, the heat insulation material has extremely low thermal conductivity, so that heat energy conduction is almost isolated, a temperature difference environment is isolated, the heat conduction can be reduced due to the heat insulation coating, and the temperature of flame is isolated outside the second flame retardant layer to a certain extent.

Furthermore, the raised strips are uniformly distributed at the outer end of the outer protection layer.

Through above-mentioned technical scheme, the existence of sand grip can play the effect of support to the cable, and the sand grip is preferred to be contacted with the end, prevents outer protective sheath wearing and tearing.

Further, the weaving density of the wear-resistant layer is not less than 95%.

Through above-mentioned technical scheme, the wearing layer uses nylon fiber rope to weave and forms, has better wear resistance.

Further, the insulating layer is made of modified PVC.

Through the technical scheme, the insulating layer made of the modified PVC has good electrical insulation and good high-temperature resistance during connection.

To sum up, the utility model discloses mainly have following beneficial effect: in the utility model, the sand grip is arranged, the sand grip can support the cable, the sand grip is preferentially contacted with the bottom to prevent the outer protective sleeve from being worn, the inner part of the sand grip is provided with the reinforced core, the wear resistance of the sand grip can be improved, the wear speed of the sand grip is reduced, the wear-resistant layer is arranged in the outer protective layer, and the wear resistance of the utility model can be further improved; and simultaneously, the utility model discloses in, still be provided with first fire-retardant layer and the fire-retardant layer of second, first fire-retardant layer uses the asbestos to weave and forms, and the fire-retardant layer of second uses the aluminium foil to make, has good fire behaviour, and the surface on the fire-retardant layer of second scribbles thermal-insulated coating, and thermal insulation material has extremely low thermal conductivity, makes heat energy conduction isolated almost, keeps apart the difference in temperature environment to play fire-retardant effect.

Drawings

Fig. 1 is a schematic view of the internal structure of the present embodiment.

Reference numerals: 1. a cable core; 2. an insulating layer; 3. a first flame retardant layer; 4. a second flame retardant layer; 5. a tensile layer; 6. an outer protective layer; 7. a wear layer; 8. a convex strip; 9. a reinforcing core; 10. inorganic paper ropes.

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.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "inner", "outer", "top", "bottom", "side", "vertical", "horizontal", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," "fourth," "fifth," and "sixth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

Referring to fig. 1, a high modified medium voltage power cable comprises a cable core 1, an insulating layer 2 is arranged at the outer end of the cable core 1, a first flame retardant layer 3 is arranged at the outer end of the insulating layer 2, the first flame retardant layer 3 is woven by asbestos, a second flame retardant layer 4 is arranged at the outer end of the first flame retardant layer 3, the second flame retardant layer 4 is made of aluminum foil, a tensile layer 5 is arranged at the outer end of the second flame retardant layer 4, an outer protective layer 6 is arranged at the outer end of the tensile layer 5, a wear-resistant layer 7 is arranged in the outer protective layer 6, the wear-resistant layer 7 is woven by nylon fiber ropes, a plurality of raised lines 8 are fixedly arranged at the outer end of the outer protective layer 6, a reinforcing core 9 is fixedly arranged inside the raised lines 8, and the reinforcing core 9 is formed by twisting a plurality of steel wires, the cable core 1 is made of oxygen-free copper, the cable cores 1 are twisted, the weaving density of the first flame-retardant layer 3 is 90%, and the raised line 8 is made of silicon rubber.

Referring to fig. 1, an inorganic paper rope 10 is filled between a first flame-retardant layer 3 and a second flame-retardant layer 4, the inorganic paper rope 10 is a flame-retardant inorganic paper rope, and specifically, refer to the chinese utility model patent with the publication number CN207718919U, which discloses a flame-retardant filled inorganic paper rope, and the document discloses the performance and the using method of the inorganic paper rope 10 in detail.

Referring to fig. 1, the tensile layer 5 is woven by using glass fiber ropes, and the weaving density of the tensile layer 5 is not less than 90%, and in this embodiment, the weaving density of the tensile layer 5 is 90%.

Referring to fig. 1, the outer protective layer 6 is made of silicon rubber, which is soft, has good wear resistance and good electrical insulation, and is an excellent cable sheath material.

Referring to fig. 1, the outer surface of the second flame-retardant layer 4 is coated with a thermal insulation coating, the thermal insulation coating used in this embodiment is a composite magnesium aluminum silicate thermal insulation coating, the thermal insulation material has extremely low thermal conductivity, so that thermal energy conduction is almost isolated, a temperature difference environment is isolated, the thermal insulation coating can reduce heat conduction, and the temperature of flame is isolated to the outside of the second flame-retardant layer 4 to a certain extent.

Referring to fig. 1, the protruding strips 8 are uniformly distributed at the outer end of the outer protective layer 6.

Referring to fig. 1, the weaving density of the wear-resistant layer 7 is not less than 95%, and in the present embodiment, the weaving density of the wear-resistant layer 7 is 95%.

Referring to fig. 1, the insulating layer 2 is made of modified PVC, and the insulating layer 2 made of modified PVC has good electrical insulation.

In conclusion, when the cable is in contact with the ground, the raised lines 8 are preferentially in contact with the ground, the raised lines 8 support the cable to prevent the outer protective sleeve from being worn, the reinforcing cores 9 are arranged inside the raised lines 8, so that the wear resistance of the raised lines 8 can be improved, the wear speed of the raised lines 8 can be reduced, and when the raised lines 8 are completely worn, the outer protective layer 6 can also protect the inside of the cable; meanwhile, the first flame-retardant layer 3 and the second flame-retardant layer 4 have good flame-retardant performance, the outer surface of the second flame-retardant layer 4 is coated with heat-insulating coating, and the heat-insulating material has extremely low thermal conductivity, so that heat conduction is almost isolated, and the temperature difference environment is isolated, so that the flame-retardant effect is achieved, and the flame-retardant effect is good.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (8)

1. The utility model provides a high modified middling pressure power cable, includes cable core (1), its characterized in that: the outer end of cable core (1) is provided with insulating layer (2), the outer end of insulating layer (2) is provided with first fire-retardant layer (3), first fire-retardant layer (3) use the asbestos to weave and form, the outer end of first fire-retardant layer (3) is provided with the fire-retardant layer (4) of second, the fire-retardant layer (4) of second uses the aluminium foil to make, the outer end of the fire-retardant layer (4) of second sets up tensile layer (5), the outer end of tensile layer (5) is provided with outer protective layer (6), be provided with wearing layer (7) in outer protective layer (6), wearing layer (7) use nylon fiber rope to weave and form, the outer end of outer protective layer (6) is fixed to be set up a plurality of sand grips (8), the inside of sand grip (8) is fixed to be provided with and strengthens core (9), it forms by the stranded steel wire transposition to strengthen core (9).

2. A highly modified medium voltage power cable according to claim 1, characterized in that: and an inorganic paper rope (10) is filled between the first flame-retardant layer (3) and the second flame-retardant layer (4).

3. A highly modified medium voltage power cable according to claim 1, characterized in that: the tensile layer (5) is woven by glass fiber ropes, and the weaving density of the tensile layer (5) is not less than 90%.

4. A highly modified medium voltage power cable according to claim 1, characterized in that: the outer protection layer (6) is made of silicon rubber.

5. A highly modified medium voltage power cable according to claim 1, characterized in that: the outer surface of the second flame-retardant layer (4) is coated with a heat-insulating coating.

6. A highly modified medium voltage power cable according to claim 1, characterized in that: the convex strips (8) are uniformly distributed at the outer end of the outer protective layer (6).

7. A highly modified medium voltage power cable according to claim 1, characterized in that: the weaving density of the wear-resistant layer (7) is not less than 95%.

8. A highly modified medium voltage power cable according to claim 1, characterized in that: the insulating layer (2) is made of modified PVC.

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