Flame-retardant B1-level fire-resistant control cable

Abstract

The utility model discloses a flame-retardant B1-level fire-resistant control cable, which comprises an insulating layer and a conductor, the insulating layer is wrapped outside the conductor, an insulating shielding layer is wrapped outside the insulating layer, rubber strips are arranged outside the insulating shielding layer at equal angles, and elastic rubber strips are lapped outside the rubber strips. According to the flame-retardant B1-level fire-resistant control cable, the adjacent rubber strips abut against each other, when the cable is extruded, the rubber strips deform, the rubber strips at the adjacent positions support the side edges of the extruded rubber strips, inward force can be applied to the rubber strips through the elastic rubber strips of a spiral structure, the cable can be prevented from deforming, and the service life of the cable is prolonged. And the rubber strip and the elastic rubber strip are arranged on the outer side of the insulation shielding layer, so that the whole body can be conveniently processed.

Description

TECHNICAL FIELD

[0001] The utility model relates to cable technical field, concretely is a kind of fire -retardant B1 grade fire -resistant control cable. BACKGROUND

[0002] Control cable is a kind of electric energy or signal transmission device, usually by several or several groups of wires, wherein control cable is applicable to industrial and mining enterprises, energy transportation department, supply AC rated voltage 450 / 750 volts and below control, protection line and other occasions using cable, the current existing national standard low-smoke halogen-free control cable insulation adopts crosslinked polyethylene, sheath adopts low-smoke halogen-free polyolefin.

[0003] Such as the publication number CN220121508U a kind of mining high-strength cable, tensile layer inner wall is provided with several arc-shaped rubber sleeves of equal distribution, the tensile layer outer wall is provided with spiral elastic rubber strip, each arc-shaped rubber sleeve is located between two adjacent hollow rubber tube, the elastic rubber strip section is circular.

[0004] The above-mentioned cable is prevented from deforming by the cooperation of elastic rubber strip and arc-shaped rubber sleeve, since the arc-shaped rubber sleeve is arranged inside the tensile layer, the tensile layer is arranged by extrusion, and the tensile layer is easily filled in the arc-shaped position inside the arc-shaped rubber sleeve during the manufacturing process of the tensile layer, it is difficult to make the arc-shaped rubber sleeve into a hollow structure, and it is not convenient for processing. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a kind of fire -retardant B1 grade fire -resistant control cable to solve the problem that cable is difficult to process into specified structure in the above background art.

[0006] To achieve the above object, the utility model provides the following technical scheme: a kind of fire -retardant B1 grade fire -resistant control cable, including insulating layer and conductor, insulating layer is wrapped in the outer side of conductor, insulating layer outer side is wrapped with insulating shield layer, and the outer side of insulating shield layer is provided with rubber strip at equal angle, and the outer side of rubber strip is wrapped with elastic rubber strip.

[0007] Preferably, the outer side of the elastic rubber strip is wrapped with a steel belt armored protective layer, the outer side of the steel belt armored protective layer is wrapped with an alkali-free flame-retardant glass fiber rope, the outer side of the alkali-free flame-retardant glass fiber rope is extruded with a waterproof isolation sleeve, and the outer side of the waterproof isolation sleeve is extruded with a sheath.

[0008] Preferably, the rubber strip is a hollow structure, and the adjacent two rubber strips are in contact with each other.

[0009] Preferably, the elastic rubber strip is provided in a spiral structure, and there is a spacing between the elastic rubber strips.

[0010] Preferably, the inside of the insulation shielding layer and the insulation layer are filled with a filler, which is a mineral fireproof filler layer.

[0011] Preferably, the sheath and the insulation layer are flame-retardant B1 grade low-smoke halogen-free polyolefin materials.

[0012] Compared with the prior art, the utility model has the beneficial effects that:

[0013] 1. The rubber strips and the elastic rubber strips are arranged, the adjacent rubber strips abut against each other, the rubber strips deform when the cable is pressed, the rubber strips at adjacent positions support the side edges of the pressed rubber strips, the elastic rubber strips of the spiral structure can apply the inward force to the rubber strips, the cable deformation can be avoided, and since the rubber strips and the elastic rubber strips are arranged outside the insulation shielding layer, the whole can be conveniently machined.

[0014] 2. The alkali-free flame-retardant glass fiber rope is arranged, the alkali-free flame-retardant glass fiber rope has the function of flame retardation, thereby improving the flame-retardant grade and the fire resistance grade of the control cable, and the fire occurrence probability can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a three-dimensional structure schematic view of the steel tape armored protective layer of the utility model;

[0016] Figure 2 It is a main section structure schematic view of the utility model;

[0017] Figure 3 It is a three-dimensional schematic view of the hollow rubber of the utility model;

[0018] Figure 4 It is a schematic view of the elastic rubber strip structure of the utility model.

[0019] In the drawing: 1, steel tape armored protective layer; 2, insulation shielding layer; 3, insulation layer; 4, rubber strip; 5, conductor; 6, filler; 7, elastic rubber strip; 8, sheath; 9, alkali-free flame-retardant glass fiber rope; 10, waterproof isolation sleeve. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0021] Please refer to Figures 1-4 The utility model provides the following technical scheme:

[0022] The application relates to a fire-retardant B1-grade fire-resistant control cable, which comprises an insulating layer 3 and a conductor 5, the insulating layer 3 is wrapped outside the conductor 5, an insulating shielding layer 2 is wrapped outside the insulating layer 3, and a rubber strip 4 is arranged outside the insulating shielding layer 2 at equal angles, the outside of the rubber strip 4 is wrapped with an elastic rubber strip 7, the rubber strip 4 is of a hollow structure, and the adjacent two rubber strips 4 are in contact with each other, the elastic rubber strip 7 is arranged in a spiral structure, and there is a spacing between the elastic rubber strips 7.

[0023] The rubber strips 4 arranged outside the insulating shielding layer 2 are in contact with each other, when the rubber strip 4 at a certain position is extruded, the rubber strip 4 at the side edge is in contact with the extruded rubber strip 4, the rubber strip 4 is of a hollow structure, the heat dissipation of the cable is accelerated, the rubber strip 4 and the elastic rubber strip 7 can improve the compression resistance of the cable, thereby improving the structural strength, the elastic rubber strip 7 is extruded to realize bending, and the elastic rubber strip 7 has a restoring tendency, so that the bending resistance of the cable is improved.

[0024] The outside of the elastic rubber strip 7 is wrapped with a steel tape armored protection layer 1, the outside of the steel tape armored protection layer 1 is wrapped with an alkali-free fire-retardant glass fiber rope 9, the outside of the alkali-free fire-retardant glass fiber rope 9 is extruded with a waterproof isolation sleeve 10, and the outside of the waterproof isolation sleeve 10 is extruded with a sheath 8.

[0025] The inside of the insulating shielding layer 2 and the insulating layer 3 are filled with a filler 6, the filler 6 is a mineral fireproof filler layer, the sheath 8 and the insulating layer 3 are made of a fire-retardant B1-grade low-smoke halogen-free polyolefin material.

[0026] The alkali-free fire-retardant glass fiber rope 9 improves the fire-retardant grade of the cable and reduces the probability of cable fire.

[0027] The cable processing process is as follows: firstly, the materials required for the cable are prepared, a copper rod or an aluminum rod is stretched into a conductor 5 with a required diameter through a wire drawing machine, the single conductor 5 after wire drawing is stranded into multiple strands to increase softness and conductivity, the stranded conductor 5 is uniformly coated with an insulating layer 3 through an insulating extruder, the insulated wire is stranded into a cable according to a certain structure, the filler 6 and the insulating shielding layer 2 are sequentially covered outside the insulating layer 3 through an extruder, then the rubber strip 4 prepared in advance is wrapped around the insulating shielding layer 2, then the elastic rubber strip 7, the steel tape armored protection layer 1 and the alkali-free fire-retardant glass fiber rope 9 are sequentially wrapped outside the rubber strip 4 in a wrapping mode, then the waterproof isolation sleeve 10 and the sheath 8 are sequentially coated outside through an extruder, so that the cable is protected from the external environment, finally, vulcanization treatment is carried out in a vulcanization tank, so that the heat resistance, cold resistance and oil resistance of the cable are improved, and the cable is completed.

[0028] Although the utility model has been explained in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement to part of the technical features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A flame-retardant B1-grade fire-resistant control cable, comprising an insulation layer (3) and a conductor (5), wherein the insulation layer (3) is wrapped around the outside of the conductor (5), characterized in that, An insulating shielding layer (2) is wrapped around the outside of the insulating layer (3), and rubber strips (4) are provided at equal angles on the outside of the insulating shielding layer (2), and elastic rubber strips (7) are wrapped around the outside of the rubber strips (4).

2. The flame-retardant B1-grade fire-resistant control cable according to claim 1, characterized in that: The elastic rubber strip (7) is wrapped with a steel belt armored protective layer (1) on the outside, and an alkali-free flame-retardant fiberglass rope (9) is wrapped with the outside of the steel belt armored protective layer (1). A waterproof isolation sleeve (10) is extruded on the outside of the alkali-free flame-retardant fiberglass rope (9), and a protective sleeve (8) is extruded on the outside of the waterproof isolation sleeve (10).

3. The flame-retardant B1-grade fire-resistant control cable according to claim 1, characterized in that: The rubber strip (4) has a hollow structure, and two adjacent rubber strips (4) are in contact with each other.

4. The flame-retardant B1-grade fire-resistant control cable according to claim 1, characterized in that: The elastic rubber strip (7) is arranged in a spiral structure, and there are gaps between the elastic rubber strips (7).

5. The flame-retardant B1-grade fire-resistant control cable according to claim 1, characterized in that: The inner side of the insulating shielding layer (2) and the insulating layer (3) are filled with filler (6), which is a mineral fireproof filler layer.

6. The flame-retardant B1-grade fire-resistant control cable according to claim 2, characterized in that: The sheath (8) and insulation layer (3) are made of flame-retardant B1 grade low-smoke halogen-free polyolefin material.

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