Environment-friendly flame-retardant B1-level medium-voltage intelligent cable

Abstract

The utility model discloses an environment-friendly flame-retardant B1-level medium-voltage intelligent cable, which belongs to the field of cables and comprises a plurality of conductor units, each conductor unit comprises a conductor body and a modified polypropylene insulating layer wrapped outside the conductor body, and the modified polypropylene insulating layers of the plurality of conductor units abut against one another; the first ceramic silicone rubber tape and the outer sheath sequentially wrap the modified polypropylene insulating layers of the plurality of conductor units; and the plurality of optical fibers are positioned between the modified polypropylene insulating layers of the plurality of conductor units and the first ceramic silicone rubber tape. The intelligent control cable has the technical effects of good environment-friendly performance, flame-retardant performance and intelligent performance.

Description

Technical Field

[0001] The utility model relates to a cable, in particular to an environmentally friendly flame-retardant B1-level medium-voltage intelligent cable. Background Art

[0002] Cable is a device used to achieve power transmission. It has the advantage of good power transmission performance and is widely used in communication technology, power systems and other fields.

[0003] With the rapid development of science and technology, related cables are no longer just responsible for power transmission. Higher requirements have begun to be placed on related cables. However, the environmental protection performance, flame retardant performance and intelligent performance of related cables are not good. Utility Model Content

[0004] Purpose of the utility model: The purpose of this utility model is to provide an environmentally friendly flame-retardant B1 grade medium-voltage intelligent cable, which has good environmental performance, flame retardant performance and intelligent performance.

[0005] Technical solution:

[0006] An environmentally friendly flame-retardant B1-level medium-voltage intelligent cable, comprising:

[0007] A plurality of conductor units, each comprising a conductor body and a modified polypropylene insulation layer wrapped around the conductor body, wherein the modified polypropylene insulation layers of the plurality of conductor units are in contact with each other;

[0008] a first ceramic silicone rubber tape and an outer sheath sequentially wrapped around the modified polypropylene insulation layers of the plurality of conductor units;

[0009] A plurality of optical fibers are located between the modified polypropylene insulation layers of the plurality of conductor units and the first ceramic silicone rubber tape.

[0010] Optionally, the conductor unit further includes:

[0011] a conductor shielding layer located between the conductor body and the modified polypropylene insulation layer;

[0012] an insulating shielding layer and a metal shielding layer sequentially wrapped around the modified polypropylene insulating layer;

[0013] The metal shielding layers of the conductor units conflict with each other, the first ceramic silicone rubber belt is wrapped around the metal shielding layers of the conductor units, and the optical fibers are located between the metal shielding layers of the conductor units and the first ceramic silicone rubber belt.

[0014] Optionally, the conductor body includes a plurality of oxygen-free copper wires twisted together, and the conductor shielding layer is wrapped around the plurality of oxygen-free copper wires.

[0015] Optionally, it further includes a filling rope filled between the modified polypropylene insulation layer of the plurality of conductor units and the first ceramic silicone rubber tape, and the plurality of optical fibers are located in the filling rope.

[0016] Optionally, it further includes an inner sheath, a second ceramic silicone rubber belt, an armor layer and a third ceramic silicone rubber belt sequentially wrapped around the first ceramic silicone rubber belt, and the outer sheath is wrapped around the third ceramic silicone rubber belt.

[0017] Optionally, the armor layer includes:

[0018] A number of steel wires arranged at intervals;

[0019] a spacing formed between adjacent steel wires;

[0020] Wherein, the plurality of steel wires and the spacing are both located between the second ceramic silicone rubber belt and the third ceramic silicone rubber belt.

[0021] Optionally, the spacing is no greater than 4 mm.

[0022] Optionally, the inner sheath is made of thermoplastic 90°C halogen-free, low-smoke, flame-retardant polyolefin sheath material.

[0023] Optionally, the outer sheath is made of black B1 grade 90°C halogen-free, low-smoke, highly flame-retardant polyolefin sheath material.

[0024] Optionally, the plurality of optical fibers are all multimode optical fibers.

[0025] Beneficial effects:

[0026] 1) The modified polypropylene insulation layer is used for insulation, and the modified polypropylene is convenient for making the environmental performance good;

[0027] 2) The first ceramic silicone rubber belt can form a solid ceramic shell in the flame, and the ceramic shell will not melt or drip in the fire environment, effectively isolating the fire source, making it easy to pass the d0 target in the flame retardant B test and having good flame retardant performance;

[0028] 3) Several optical fibers are used to connect to terminals and have good intelligent performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a structural schematic diagram of an environmentally friendly flame-retardant B1-level medium-voltage intelligent cable according to Example 1 of the present utility model;

[0030] Figure 2 This is a schematic structural diagram of a conductor unit according to Example 1 of the present utility model;

[0031] In the figure: 1. Conductor unit; 11. Conductor body; 12. Conductor shielding layer; 13. Modified polypropylene insulation layer; 14. Insulation shielding layer; 15. Metal shielding layer; 2. Optical fiber; 3. Filling rope; 4. First ceramic silicone rubber tape; 5. Inner sheath; 6. Second ceramic silicone rubber tape; 7. Armor layer; 71. Steel wire; 72. Spacing; 8. Third ceramic silicone rubber tape; 9. Outer sheath. DETAILED DESCRIPTION

[0032] In order to make the technical solution of the present invention clearer, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] Example 1

[0034] like Figure 1-2 This embodiment provides an environmentally friendly flame-retardant B1-grade medium-voltage intelligent cable, comprising: a plurality of conductor units 1, each of the conductor units 1 including a conductor body 11 and a modified polypropylene insulation layer 13 wrapped around the conductor body 11, wherein the modified polypropylene insulation layers 13 of the plurality of conductor units 1 are in contact with each other; a first ceramic silicone rubber tape 4 and an outer sheath 9 sequentially wrapped around the modified polypropylene insulation layers 13 of the plurality of conductor units 1; and a plurality of optical fibers 2 located between the modified polypropylene insulation layers 13 of the plurality of conductor units 1 and the first ceramic silicone rubber tape 4.

[0035] Specifically, the conductor body 11 is used to realize power transmission, the modified polypropylene insulation layer 13 is used for insulation, and the modified polypropylene is convenient for making the environmental protection performance good. The conductor body 11, the modified polypropylene insulation layer 13, etc. constitute the conductor unit 1. The specific number of the conductor unit 1 is not limited, and can be three, four, etc., preferably three; the first ceramic silicone rubber belt 4 can form a solid ceramic shell in the flame, and the ceramic shell will not melt or drip in the fire environment, effectively isolating the fire source, facilitating the passing of the d0 target in the flame retardant B1 test, and has good flame retardant performance; the outer sheath 9 is used to protect ; Several optical fibers 2 are used to connect to the terminal, have good intelligent performance, can accurately locate the fault point of the cable of this application, with an error of no more than 2m, and can also monitor the operating temperature of each section of the cable of this application in real time. Once the load is too large or a short circuit occurs, the fault location can be monitored and alarmed in the first time. The mobile phone can also vibrate the signal. If someone tries to steal the cable of this application, the vibration signal during the theft will be collected by the optical fiber 2 and quickly transmitted to the terminal. The terminal will immediately issue an alarm to notify the on-duty personnel, and the on-duty personnel will quickly arrive at the theft point to capture the criminals, thereby avoiding losses.

[0036] Further, such as Figure 2The conductor unit 1 also includes: a conductor shielding layer 12 located between the conductor body 11 and the modified polypropylene insulation layer 13; an insulating shielding layer 14 and a metal shielding layer 15 sequentially wrapped around the modified polypropylene insulation layer 13; wherein the metal shielding layers 15 of several conductor units 1 conflict with each other, the first ceramic silicone rubber tape 4 is wrapped around the metal shielding layers 15 of several conductor units 1, and the several optical fibers 2 are located between the metal shielding layers 15 of the several conductor units 1 and the first ceramic silicone rubber tape 4.

[0037] Specifically, the conductor shielding layer 12 is used to homogenize the electric field on the surface of the conductor body 11 to prevent electric field distortion; the insulating shielding layer 14 is used for insulation shielding, and the materials of the conductor shielding layer 12 and the insulating shielding layer 14 are both modified polypropylene. At the same time, the conductor shielding layer 12, the modified polypropylene insulation layer 13 and the insulating shielding layer 14 are extruded on the surface of the conductor body 11 by a three-layer co-extrusion method of a cross-linking machine; the metal shielding layer 15 is used to shield the signal, and in the event of a short circuit, the short-circuit current can be conducted into the ground. The material of the metal shielding layer 15 is preferably copper tape, and a copper screen machine is used to overlap and wrap the copper tape around the insulating shielding layer 14.

[0038] Further, such as Figure 2 The conductor body 11 includes a plurality of oxygen-free copper wires twisted together, and the conductor shielding layer 12 is wrapped around the oxygen-free copper wires. Specifically, the twisted oxygen-free copper wires provide the conductor body 11 with excellent bending, tensile, and creep resistance. The conductor shielding layer 12 fills the outer gaps of the twisted oxygen-free copper wires, reducing the wire guide effect and ensuring a smooth and rounded interface between the modified polypropylene insulation layer 13 and the conductor body 11, thereby preventing the occurrence of partial discharge.

[0039] Further, such as Figure 1 The cable also includes a filling rope 3 filled between the modified polypropylene insulation layer 13 of the plurality of conductor units 1 and the first ceramic silicone rubber tape 4, and the plurality of optical fibers 2 are located in the filling rope 3. Specifically, the filling rope 3 is preferably made of an inorganic material. Specifically, the filling rope 3 is inserted into the gaps between the plurality of conductor units 1 during cabling by a cabling machine to fill the gaps. The filling rope 3 is not hygroscopic, is suitable for the operating temperature of the cable of the present application, is safe, environmentally friendly, and recyclable.

[0040] Further, such as Figure 1 The device further comprises an inner sheath 5, a second ceramic silicone rubber strip 6, an armor layer 7, and a third ceramic silicone rubber strip 8, which are sequentially wrapped around the first ceramic silicone rubber strip 4. An outer sheath 9 is wrapped around the third ceramic silicone rubber strip 8. Specifically, the inner sheath 5 is provided for protection and is extruded by an extruder. The second ceramic silicone rubber strip 6 and the third ceramic silicone rubber strip 8, in conjunction with the first ceramic silicone rubber strip 4, provide triple flame retardancy, further enhancing flame retardancy. The armor layer 7 is provided to increase tensile strength.

[0041] Further, such as Figure 1 The armor layer 7 includes: a plurality of steel wires 71 spaced apart; and spacings 72 formed between adjacent steel wires 71. The steel wires 71 and spacings 72 are located between the second ceramic silicone rubber strip 6 and the third ceramic silicone rubber strip 8. Specifically, the steel wires 71 are used to increase tensile strength. The spacing allows for a reduced number of steel wires 71, thereby reducing the weight of the cable and, consequently, the cost.

[0042] Further, such as Figure 1 Specifically, the spacing 72 can be 4 mm, 3 mm, or 2 mm. If the spacing 72 is too large, the tensile strength may be insufficient. If the spacing 72 is too small, the weight of the cable of the present application may be too large.

[0043] Further, such as Figure 1 The inner sheath 5 is made of a thermoplastic 90°C halogen-free, low-smoke, flame-retardant polyolefin sheath material. Specifically, the thermoplastic 90°C halogen-free, low-smoke, flame-retardant polyolefin sheath material facilitates the inner sheath 5 to have halogen-free, low-smoke and other characteristics, and is safe and environmentally friendly.

[0044] Further, such as Figure 1 The outer sheath 9 is made of a black B1 grade 90°C halogen-free, low-smoke, highly flame-retardant polyolefin sheath material. Specifically, the black B1 grade 90°C halogen-free, low-smoke, highly flame-retardant polyolefin sheath material allows the outer sheath 9 to generate low smoke and no toxic gases during combustion, while also having high light transmittance, thus preventing secondary injuries to personnel.

[0045] Further, such as Figure 1 , the plurality of optical fibers 2 are all multimode optical fibers. Specifically, multimode optical fibers facilitate low cost of the optical fibers 2 and relatively simple connection and splicing characteristics.

[0046] The above embodiments merely illustrate several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the concept of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. An environmentally friendly flame retardant B1 grade medium voltage intelligent cable, characterized in that: include: A plurality of conductor units, each comprising a conductor body and a modified polypropylene insulation layer wrapped around the conductor body, wherein the modified polypropylene insulation layers of the plurality of conductor units are in contact with each other; a first ceramic silicone rubber tape and an outer sheath sequentially wrapped around the modified polypropylene insulation layers of the plurality of conductor units; A plurality of optical fibers are located between the modified polypropylene insulation layers of the plurality of conductor units and the first ceramic silicone rubber tape.

2. The environmentally friendly flame-retardant B1-level medium-voltage intelligent cable according to claim 1, characterized in that: The conductor unit further includes: a conductor shielding layer located between the conductor body and the modified polypropylene insulation layer; an insulating shielding layer and a metal shielding layer sequentially wrapped around the modified polypropylene insulating layer; The metal shielding layers of the conductor units conflict with each other, the first ceramic silicone rubber belt is wrapped around the metal shielding layers of the conductor units, and the optical fibers are located between the metal shielding layers of the conductor units and the first ceramic silicone rubber belt.

3. The environmentally friendly flame-retardant B1-level medium-voltage intelligent cable according to claim 2, characterized in that: The conductor body includes a plurality of oxygen-free copper wires twisted together, and the conductor shielding layer is wrapped around the plurality of oxygen-free copper wires.

4. An environmentally friendly flame-retardant B1-level medium-voltage intelligent cable according to any one of claims 1 to 3, characterized in that: It also includes a filling rope filled between the modified polypropylene insulation layer of the plurality of conductor units and the first ceramic silicone rubber tape, and the plurality of optical fibers are located in the filling rope.

5. The environmentally friendly flame-retardant B1-level medium-voltage intelligent cable according to any one of claims 1 to 3, characterized in that: It also includes an inner sheath, a second ceramic silicone rubber belt, an armor layer and a third ceramic silicone rubber belt, which are sequentially wrapped around the first ceramic silicone rubber belt, and the outer sheath is wrapped around the third ceramic silicone rubber belt.

6. The environmentally friendly flame-retardant B1-level medium-voltage intelligent cable according to claim 5, characterized in that: The armor layer comprises: A number of steel wires arranged at intervals; a spacing formed between adjacent steel wires; Wherein, the plurality of steel wires and the spacing are both located between the second ceramic silicone rubber belt and the third ceramic silicone rubber belt.

7. The environmentally friendly flame-retardant B1-level medium-voltage intelligent cable according to claim 6, characterized in that: The spacing is no greater than 4 mm.

8. The environmentally friendly flame-retardant B1-level medium-voltage intelligent cable according to claim 5, characterized in that: The inner sheath is made of thermoplastic 90°C halogen-free, low-smoke, flame-retardant polyolefin sheath material.

9. The environmentally friendly flame-retardant B1-level medium-voltage intelligent cable according to any one of claims 1 to 3, characterized in that: The outer sheath is made of black B1 grade 90°C halogen-free, low-smoke, highly flame-retardant polyolefin sheath material.

10. The environmentally friendly flame-retardant B1-level medium-voltage intelligent cable according to any one of claims 1 to 3, characterized in that: The plurality of optical fibers are all multimode optical fibers.

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