Flame-retardant cable capable of increasing arrangement flame retardance

Abstract

The utility model relates to the technical field of wires and cables, in particular to a flame-retardant cable with increased arrangement flame retardance, which improves the flame retardance of the whole cable bundle, can delay the fire progress of the cable and provides time for rescue, and is provided with a conductor and a flame-retardant sheath positioned outside the conductor, the flame-retardant sheath is provided with a body part and two side wing parts integrally extending outwards from the body part; on the cross section of the flame-retardant sheath, the contour shape of the body part is rectangular, and the two side wing parts are a left side wing part located on the left side edge of the rectangle and a right side wing part located on the right side edge of the rectangle respectively. And the height positions of the left side wing part and the right side wing part on the body part are different, so that at least parts of the left side wing part and the right side wing part of adjacent cables are mutually staggered when the flame-retardant cables are arranged.

Description

TECHNICAL FIELD

[0001] The utility model relates to wire and cable technical field especially a kind of flame-retardant cable of increasing arrangement flame retardancy. BACKGROUND

[0002] Flame-retardant cable is cable with flame-retardant sheath, and the flame-retardant sheath is formed by extruding after adding flame retardant into outer plastic wrapping material. The flame-retardant sheath can automatically extinguish in the case of leaving fire source, but it will still burn when encountering fire. Preventing cable from contacting fire and reducing contact time are both fireproof means.

[0003] Generally, when installing and laying cable, several or tens of cables or more are transversely or vertically arranged, and there will be gaps between cables. When fire occurs, flames can easily penetrate from the gaps, intensify the degree of fire and spread the range of fire. Experiments have proved that when cables are arranged closely, cable bundle is easy to pass the burning requirement and has good arrangement flame retardancy; when there are gaps between cables, cable bundle is difficult to pass the burning requirement and has poor arrangement flame retardancy. Because cables have natural bending, it is inevitable that there are gaps between cables, that is, the existing cylindrical flame-retardant cable has insufficient flame retardancy when arranged and used. SUMMARY

[0004] The utility model solves the technical problems: provide a kind of flame-retardant cable of increasing arrangement flame retardancy, improve the flame-retardant performance of whole cable bundle, so that it can delay the fire progress of cable and provide time for rescue.

[0005] The utility model solves the technical problems by the technical scheme: a kind of flame-retardant cable of increasing arrangement flame retardancy, with conductor and the flame-retardant sheath located outside the conductor, the flame-retardant sheath has body part and two wing parts that are integrally extended outward from the body part;On the cross section of the flame-retardant sheath, the contour shape of the body part is rectangle, and the two wing parts are left wing part located on the left side of rectangle and right wing part located on the right side, the height position of the left wing part and the right wing part on the body part is different to make at least one part of the left wing part and the right wing part of adjacent cables interleave when arranging and setting the flame-retardant cable.

[0006] Specifically, an insulating sleeve is arranged between the conductor and the flame-retardant sheath.

[0007] Specifically, the cross-sectional shape of the left wing part and the right wing part is rectangle.

[0008] Specifically, on the cross section of the flame-retardant sheath, the top edge of the left wing part is parallel to the top edge of the body part, and the bottom edge of the right wing part is parallel to the bottom edge of the body part.

[0009] The utility model discloses a beneficial effect is: the utility model discloses the increase arrangement flammability of flame -retardant cable, set up opposite side wing on the rectangular flame -retardant sheath body, one side by the rectangular section reduces arrangement gap, the other side by the staggered wing supplementary filling in the gap formed because of the natural bending of cable, realize the delay of the flowing air and / or flame perpendicular to the cable direction when on fire to protect the cable part inside and / or the cable inside, strive for more rescue time. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 It is the cross section schematic drawing of the utility model first kind structure;

[0011] Figure 2 It is the cross section schematic drawing of the utility model second kind structure;

[0012] Figure 3 It is the cross section schematic drawing of the utility model first kind structure cable arrangement setting.

[0013] In the drawing: 1, conductor;

[0014] 2, flame -retardant sheath, 2-1, body part, 2-2, left wing part, 2-3, right wing part;

[0015] 3, insulating sleeve. DETAILED DESCRIPTION

[0016] The technical scheme in the embodiment of the utility model is described in detail below in combination with the drawings of the utility model specification.

[0017] As shown in the attached Figure 1 The first kind structure of the increase arrangement flammability of flame -retardant cable, has the conductor 1 and the flame -retardant sheath 2 in the conductor 1 outside, the conductor 1 is two, and the insulating sleeve 3 is arranged between each conductor 1 and the flame -retardant sheath 2, and the conductor 1 can also be one or three or more, the flame -retardant sheath 2 has the body part 2-1 and the two wing parts that are integrally extended outward from the body part 2-1;On the cross section of the flame -retardant sheath 2, the contour shape of the body part 2-1 is rectangular, and the two wing parts are the left wing part 2-2 located on the left side of the rectangle and the right wing part 2-3 located on the right side, and the cross section shape of the left wing part 2-2 and the right wing part 2-3 is rectangular, and the height position of the left wing part 2-2 and the right wing part 2-3 on the body part 2-1 is different to make at least a part of the left wing part 2-2 and the right wing part 2-3 of adjacent cables staggered when arranging and setting the flame -retardant cable, and the staggered form is as shown in the attached Figure 3 The left wing part 2-2 and the right wing part 2-3 only have overlapping parts in left and right spatial positions, and the two are not in contact, and the attached Figure 3is arranged in two layers by 8 fire-retardant cables, the horizontal distance between adjacent cables is different due to natural bending in a certain cross section, the left wing 2-2 and the right wing 2-3 of the adjacent cables are staggered, so that there is no straight-through channel from top to bottom or from bottom to top, the air flow is delayed, the flame retardation effect is better than the air delay, in the cross section of the fire-retardant sheath 2, the top edge of the left wing 2-2 is flush with the top edge of the body part 2-1, and the bottom edge of the right wing 2-3 is flush with the bottom edge of the body part 2-1, obviously, the thickness of the left wing 2-2 and the right wing 2-3 should be less than half of the thickness of the body part 2-1.

[0018] attached Figure 2 is a second structure of the fire-retardant cable for increasing the arrangement fire retardancy, which is different from the first structure only in that the length of the side edge of the body part 2-1 is greater than the length of the top edge, and the second structure is to illustrate that the wing part can also be arranged on the long edge of the body part 2-1.

[0019] Since the cables can be arranged horizontally or vertically between the upper and lower floors, how to stack the cables during arrangement should also be determined according to the space, and the arrangement of the cable wing on the body should be determined according to the cable arrangement form and the direction of the fire source.

[0020] The extension length of the left wing 2-2 and the right wing 2-3 should be greater than the size of the natural bending amplitude of the cable.

[0021] In the present application, specific examples are used to illustrate the principles and implementation modes of the present application, and the above examples are only used to help understand the method and core idea of the present application; at the same time, for those skilled in the art, according to the idea of the present application, the specific implementation mode and application range will be changed. In conclusion, the content of the present application should not be understood as a limitation of the present application.

Claims

1. A flame-retardant cable having an increased flame-retardant arrangement, having a conductor (1) and a flame-retardant sheath (2) which surrounds the conductor (1), characterized in that: The fire-retardant sheath (2) has a body part (2-1) and two wing parts extending outwardly from the body part (2-1) integrally; the profile shape of the body part (2-1) is rectangular in the cross section of the fire-retardant sheath (2), and the two wing parts are a left wing part (2-2) on the left side of the rectangle and a right wing part (2-3) on the right side, respectively; the left wing part (2-2) and the right wing part (2-3) are at different height positions on the body part (2-1) so that at least a part of the left wing part (2-2) and the right wing part (2-3) of adjacent cables are staggered with each other when the fire-retardant cables are arranged.

2. A flame-retardant cable with increased lay-flat flame retardancy according to claim 1, characterized by: An insulating sleeve (3) is arranged between the conductor (1) and the fire-retardant sheath (2).

3. The flame-retardant cable of claim 1, wherein: the flame-retardant cable is a flame-retardant power cable. The cross section shape of the left wing part (2-2) and the right wing part (2-3) is rectangular.

4. The flame-retardant cable of claim 1, wherein the flame-retardant cable is further characterized by In the cross section of the fire-retardant sheath (2), the top edge of the left wing part (2-2) is parallel to the top edge of the body part (2-1), and the bottom edge of the right wing part (2-3) is parallel to the bottom edge of the body part (2-1).

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