Compression-resistant flame-retardant cable

Abstract

The utility model discloses a compression-resistant flame-retardant cable, and relates to the technical field of cables. The utility model relates to a compression-resistant flame-retardant cable, which comprises two conductors arranged at an interval, the compression-resistant frame wraps the outer sides of the two conductors; the conductor outer wrapping layer wraps the compression-resistant frame and the two conductors, and the conductor outer wrapping layer sequentially comprises a mica tape layer, an outer insulating layer, an outer shielding layer, a compression-resistant layer, a wrapping layer and an outer sheath layer from inside to outside; a refractory material is filled between the compression-resistant frame and the mica tape layer; the compression-resistant frame comprises an upper compression-resistant frame and a lower compression-resistant frame which are spliced with each other; two upper conductor clamping grooves which are symmetrical at an interval are formed in the bottom of the upper compression-resistant frame; and a first inserting block, a second inserting block and a third inserting block are sequentially arranged on the clamping groove sides of the two upper conductor clamping grooves in the bottom of the upper compression-resistant frame. According to the technical scheme of the utility model, the compression-resistant and flame-retardant cable is designed, and the cable is better in compression resistance and flame retardance, so that the compression-resistant, fireproof and flame-retardant effects of the cable are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a compression-resistant and flame-retardant cable. Background Art

[0002] At present, for the cables laid in the urban underground power grid, the cables in this scenario will be subjected to various pressures during use. Affected by various external pressures, the internal conductive cores of the cables are prone to be squeezed and cracked, thus affecting the stability of cable use; and during the use of the cables, due to reasons such as fire, due to poor flame retardancy of the cables, secondary fires of the cables may be triggered, affecting the use of the cables.

[0003] Therefore, the inventor believes that how to solve the above technical problems and design a cable with better compression resistance and better flame retardancy is a technical problem that needs to be solved in the current cable technology field.

[0004] The information disclosed in this background art section is only intended to increase the understanding of the overall background of the present utility model, and should not be regarded as an admission or any form of implication that this information constitutes the prior art already known to those of ordinary skill in the art. Summary of the Utility Model

[0005] In view of the above technical problems, an embodiment of the present utility model provides a compression-resistant and flame-retardant cable to solve the problems raised in the above background art.

[0006] The present utility model provides the following technical solutions:

[0007] A compression-resistant and flame-retardant cable, comprising:

[0008] Two conductors arranged at intervals;

[0009] A compression-resistant frame, wrapped outside the two conductors;

[0010] A conductor outer layer, wrapping the compression-resistant frame and the two conductors therein. The conductor outer layer sequentially includes a mica tape layer, an outer insulation layer, an outer shielding layer, a compression layer, a wrapping layer and an outer sheath layer from inside to outside; a refractory material is filled between the compression-resistant frame and the mica tape layer;

[0011] The compression-resistant frame includes two mutually spliced upper compression-resistant frames and lower compression-resistant frames;

[0012] Two spaced and symmetric upper conductor slots are arranged at the bottom of the upper compression-resistant frame, and a first insertion block, a second insertion block and a third insertion block are sequentially arranged on the slot sides of the two upper conductor slots at the bottom of the upper compression-resistant frame;

[0013] There are two symmetrically spaced lower conductor slots provided at the top of the lower compression frame. At the slot sides of the two lower conductor slots on the top of the lower compression frame, a first insertion slot, a second insertion slot, and a third insertion slot are sequentially provided.

[0014] After the upper compression frame and the lower compression frame are spliced, the first insertion block, the second insertion block, and the third insertion block on the upper compression frame are respectively inserted into the first insertion slot, the second insertion slot, and the third insertion slot on the lower compression frame.

[0015] Two conductors are respectively arranged in the slots spliced by the upper conductor slot and the lower conductor slot.

[0016] Preferably, the compression layer includes two outer ring layer shells and an inner ring layer shell that are spaced apart, and compression bending members fixed between the outer ring layer shell and the inner ring layer shell; the compression bending members are arranged in a wavy shape around the inner ring layer shell.

[0017] Preferably, the material of the compression layer is hard plastic or aluminum material.

[0018] Preferably, the material of the outer insulation layer is cross-linked polyethylene; the wrapping layer is a semiconductive water-blocking buffer tape; the outer sheath layer is a silane-based low-smoke and halogen-free flame-retardant polyolefin; the refractory material is magnesium oxide.

[0019] A compression and flame-retardant cable provided by an embodiment of the present invention has the following beneficial effects: The present invention designs a compression and flame-retardant cable, which has good compression resistance and good flame retardancy, and improves the compression, fire prevention, and flame-retardant effects of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic structural diagram of the present invention from a first angle;

[0021] Figure 2 It is a schematic structural diagram of the present invention from a second angle;

[0022] Figure 3 It is a schematic structural diagram of the compression frame of the present invention from a first angle;

[0023] Figure 4 It is an exploded view of the compression frame of the present invention;

[0024] Figure 5 It is of the present invention Figure 1 a partial enlarged view of a part of the structure. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present utility model.

[0026] Refer to Figures 1-5 。

[0027] In view of the problems mentioned in the above background technology, the embodiments of the present utility model provide a compression-resistant and flame-retardant cable to solve the above technical problems. The technical solutions are as follows:

[0028] A compression-resistant and flame-retardant cable, comprising:

[0029] Two conductors 9 arranged at intervals,

[0030] A compression-resistant frame 8, wrapped outside the two conductors 9;

[0031] A conductor outer layer, which wraps the compression-resistant frame 8 and the two conductors 9. The conductor outer layer sequentially includes a mica tape layer 6, an outer insulation layer 5, an outer shielding layer 4, a compression layer 3, a wrapping layer 2, and an outer sheath layer 1 from the inside out; a refractory material 7 is filled between the compression-resistant frame 8 and the mica tape layer 6;

[0032] The compression-resistant frame 8 includes two spliced upper compression-resistant frames 8-1 and lower compression-resistant frames 8-2; specifically, the compression-resistant frame 8 is designed in sections, and several compression-resistant frames 8 can be fixedly arranged at intervals on the two conductors 9;

[0033] Two spaced and symmetric upper conductor slots 8-11 are provided at the bottom of the upper compression-resistant frame 8-1. At the slot sides of the two upper conductor slots 8-11 at the bottom of the upper compression-resistant frame 8-1, a first insertion block 8-12, a second insertion block 8-13, and a third insertion block 8-14 are sequentially arranged;

[0034] Two spaced and symmetric lower conductor slots 8-21 are provided at the top of the lower compression-resistant frame 8-2. At the slot sides of the two lower conductor slots 8-21 at the top of the lower compression-resistant frame 8-2, a first insertion slot 8-22, a second insertion slot 8-23, and a third insertion slot 8-24 are sequentially arranged;

[0035] After the upper compression-resistant frame 8-1 and the lower compression-resistant frame 8-2 are spliced, the first insertion block 8-12, the second insertion block 8-13, and the third insertion block 8-14 on the upper compression-resistant frame 8-1 are respectively inserted into the first insertion slot 8-22, the second insertion slot 8-23, and the third insertion slot 8-24 on the lower compression-resistant frame 8-2;

[0036] Two conductors 9 are respectively arranged in the slots formed by splicing the upper conductor slot 8-11 and the lower conductor slot 8-21.

[0037] It should be noted that the compression-resistant frame 8 is set as a split structure spliced by the upper compression-resistant frame 8-1 and the lower compression-resistant frame 8-2. During cable production, the upper compression-resistant frame 8-1 and the lower compression-resistant frame 8-2 can be directly inserted on the conductor 9 for fixation, reducing the process difficulty of cable production.

[0038] In this embodiment, the compression-resistant layer 3 includes an outer ring layer shell 3-2 and an inner ring layer shell 3-1 arranged at intervals, and compression-resistant bending members 3-3 fixed between the outer ring layer shell 3-2 and the inner ring layer shell 3-1; the compression-resistant bending members 3-3 are arranged in a wave shape around the inner ring layer shell 3-1; the material of the compression-resistant layer 3 is hard plastic or aluminum material.

[0039] By filling the wave-shaped compression-resistant bending members 3-3 between the outer ring layer shell 3-2 and the inner ring layer shell 3-1, when the cable is squeezed, the cable has better support strength and is not easily deformed, so that the cable has good compression resistance.

[0040] In this embodiment, the material of the outer insulation layer 5 is cross-linked polyethylene; the wrapping layer 2 is a semiconductive water-blocking buffer tape; the outer sheath layer 1 is a silane-based low-smoke and halogen-free flame-retardant polyolefin; the refractory material 7 is magnesium oxide.

[0041] The working principle of a compression-resistant and flame-retardant cable provided by an embodiment of the present utility model is as follows:

[0042] 1. A compression-resistant frame with a fixed structure is arranged outside the conductor, so that the two conductors are not only separated and fixed in an orderly manner, and when the cable is squeezed, the compression-resistant frame also has good compression resistance;

[0043] 2. A compression-resistant layer is further added outside the compression-resistant frame in the cable. The compression-resistant layer includes an outer ring layer shell, an inner ring layer shell, and wave-shaped compression-resistant bending members filled between the outer ring layer shell and the inner ring layer shell, further improving the compression resistance of the cable;

[0044] 3. A mica tape layer is arranged in the cable. The mica tape layer has good high-temperature resistance and combustion resistance; and a refractory material is filled between the compression-resistant frame and the mica tape layer, further improving the high-temperature resistance and fire resistance of the cable.

[0045] A compression-resistant and flame-retardant cable provided by an embodiment of the present utility model has the following beneficial effects: In the present utility model, the combustible gas bag is replaced with a flame-retardant pipe structure. The flame-retardant pipe does not have a combustion-supporting property, improving the fireproof and flame-retardant effect of the cable.

[0046] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated. The components shown as units may or may not be physical units. They may be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0047] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "setting", "connection", "fixation", "swivel connection", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. It can be the internal communication of two components or the interaction relationship between two components. Unless otherwise clearly defined, for those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0048] It can be understood that for those of ordinary skill in the art, equivalent substitutions or changes can be made according to the technical solution of the present utility model and the concept of the present utility model, and all such changes or substitutions should fall within the protection scope of the appended claims of the present utility model.

Claims

1. A pressure-resistant flame-retardant cable, characterized in that: include: two conductors spaced apart; A compression frame, wrapped around the outside of the two conductors; The conductor outer sheath wraps the compression frame and the two conductors. The conductor outer sheath includes a mica tape layer, an outer insulation layer, an outer shielding layer, a compression layer, a wrapping layer and an outer sheath layer from the inside to the outside. The space between the compression frame and the mica tape layer is filled with refractory material. The compression frame includes an upper compression frame and a lower compression frame which are spliced ​​to each other; The bottom of the upper pressure-resistant frame is provided with two upper conductor slots with symmetrical intervals, and the bottom of the upper pressure-resistant frame is provided with a first plug-in block, a second plug-in block, and a third plug-in block in sequence on the sides of the two upper conductor slots; The top of the lower pressure-resistant frame is provided with two lower conductor slots with symmetrical intervals, and the top of the lower pressure-resistant frame is provided with a first plugging slot, a second plugging slot, and a third plugging slot in sequence on the sides of the two lower conductor slots; After the upper anti-compression frame and the lower anti-compression frame are spliced, the first plug-in block, the second plug-in block, and the third plug-in block on the upper anti-compression frame are respectively plugged into the first plug-in slot, the second plug-in slot, and the third plug-in slot on the lower anti-compression frame; The two conductors are respectively arranged in the slots where the upper conductor slot and the lower conductor slot are spliced.

2. The compression-resistant flame-retardant cable according to claim 1, characterized in that: The pressure-resistant layer comprises an outer ring shell and an inner ring shell which are arranged at intervals, and a pressure-resistant bending part which is fixed between the outer ring shell and the inner ring shell; the pressure-resistant bending part is arranged in a wave shape around the inner ring shell.

3. The compression-resistant flame-retardant cable according to claim 1, characterized in that: The pressure-resistant layer is made of hard plastic or aluminum.

4. The compression-resistant flame-retardant cable according to claim 1, characterized in that: The outer insulation layer is made of cross-linked polyethylene; the wrapping layer is a semi-conductive water-resistant buffer tape; the outer sheath layer is a silane-type low-smoke halogen-free flame-retardant polyolefin; and the refractory material is magnesium oxide.

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