A portable low-smoke halogen-free flame-retardant cable

Abstract

The application discloses a portable low-smoke halogen-free flame-retardant cable and relates to the technical field of cables.The low-smoke halogen-free flame-retardant cable comprises an outer protective layer, a flame-retardant layer, a cable inner protective layer and a cable inner core, the outer protective layer comprises an outer fixed shell, first wear-resistant indication strips, second wear-resistant indication strips, inner fixed holes, reinforcing wires, first limiting blocks, second limiting blocks and indication grooves, four first wear-resistant indication strips are equidistantly arranged outside the outer fixed shell, two wear-resistant indication strips are arranged, and the two wear-resistant indication strips are correspondingly arranged at V-shaped groove positions;when cutting, the cutting can be directly performed between the two wear-resistant indication strips, the cutting depth is convenient to find, the damage of the middle flame-retardant shell is reduced, the cutting is more labor-saving by cutting at the auxiliary port position of the auxiliary ring, the cable inner protective layer which needs to be cut and connected is pulled out, the cable inner protective layer can be directly separated, other cable inner protective layers and the middle partition strip can still be stably clamped, and the connection of the low-smoke halogen-free cable is convenient.

Description

Technical Field

[0001] This invention relates to the field of cable technology, specifically to a convenient low-smoke halogen-free flame-retardant cable. Background Technology

[0002] Low-smoke halogen-free cables are an environmentally friendly type of cable. Their core characteristic lies in the low smoke concentration produced during combustion and the absence of toxic halogen-containing gases. They also possess flame-retardant properties and are primarily used in locations with high safety and environmental protection requirements, such as hospitals, subways, tunnels, and high-rise buildings. This reduces secondary injuries and rescue interference during fires. Chinese patent application number 202020540962.7, "A Flame-Retardant, Fire-Resistant, Low-Smoke Halogen-Free Cable," effectively solves the problem of cables currently on the market producing large amounts of harmful gases during fires, making escape more difficult. By utilizing the oxygen-supporting combustion property, it controls the occurrence of fires, making it a highly practical flame-retardant, fire-resistant, low-smoke halogen-free cable.

[0003] Currently used low-smoke halogen-free cables require layer-by-layer stripping during splicing. Stripping the outer layer can easily damage the inner structure, and splicing one inner core can also affect the stability of the other inner cores, making the splice location prone to damage later. Summary of the Invention

[0004] This invention provides a convenient low-smoke halogen-free flame-retardant cable, which can effectively solve the problems mentioned in the background art, such as the easy damage to the inner structure when stripping the outer layer, and the fact that the connection of one inner core will also affect the stability of other inner core structures, and subsequent damage is likely to occur at the connection point.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a convenient low-smoke halogen-free flame-retardant cable, comprising an outer sheath, a flame-retardant layer, an inner sheath, and an inner core, wherein the outer sheath comprises an outer fixing shell;

[0006] Four first wear-resistant indicator strips are equidistantly arranged on the outside of the outer fixing shell. A second wear-resistant indicator strip is arranged on one side of the first wear-resistant indicator strip. An inner fixing hole is opened in the middle of the first and second wear-resistant indicator strips. A reinforcing wire is embedded in the inner fixing hole. A first limiting block is installed equidistantly on the inner sidewall of the outer fixing shell. A second limiting block is installed on the inner sidewall of the outer fixing shell near the position of the first limiting block.

[0007] The flame-retardant layer includes a central flame-retardant shell;

[0008] The outer fixed shell is equipped with a central flame-retardant shell. The outer side of the central flame-retardant shell is provided with a V-shaped groove. The inner wall of the central flame-retardant shell is provided with several annular chambers at equal intervals. An auxiliary ring is snapped into the annular chamber. A display hole is provided in the middle of the V-shaped groove corresponding to the position of the annular chamber.

[0009] The first limiting block and the second limiting block are located on both sides of the display hole, and the first wear-resistant indicator strip and the second wear-resistant indicator strip are provided with indicator grooves at the positions corresponding to the display hole.

[0010] According to the above technical solution, the outer fixed shell has wear-resistant threaded rings distributed in a spiral shape on its exterior, and wear-resistant ropes are embedded in the middle of the wear-resistant threaded rings.

[0011] According to the above technical solution, both sides of the first limiting block and the second limiting block are concave arc surface structures, and the concave arc surface is engaged and fitted with the V-shaped groove of the central flame-retardant shell.

[0012] According to the above technical solution, the outer part of the auxiliary ring is exposed at the display hole position, and the exposed part of the auxiliary ring is located between the first limiting block and the second limiting block.

[0013] According to the above technical solution, an annular groove is provided in the middle of the auxiliary ring, and an auxiliary opening is provided on the outer side of the auxiliary ring at the position corresponding to the display hole.

[0014] According to the above technical solution, a V-shaped strip is installed on the inner side of the central flame-retardant shell at the position corresponding to the V-shaped groove. The interior of the central flame-retardant shell is provided with four inner cable sheaths, namely the first inner sheath, the second inner sheath, the third inner sheath, and the fourth inner sheath; the first inner sheath, the second inner sheath, the third inner sheath, and the fourth inner sheath all contain the inner core of the cable.

[0015] According to the above technical solution, a partition is provided between the first inner protective layer, the second inner protective layer, the third inner protective layer and the fourth inner protective layer, and the partition includes a middle partition strip;

[0016] A middle partition strip is snapped between the first inner protective layer, the second inner protective layer, the third inner protective layer and the fourth inner protective layer. The four outer sides of the middle partition strip are all arc-shaped fitting surfaces. Several outer rings are fixed at equal intervals to the outside of the middle partition strip. Four separator rods are connected at equal angles to the outside of the outer rings.

[0017] The outer sides of the first inner protective layer, the second inner protective layer, the third inner protective layer and the fourth inner protective layer are all attached with an outer protective sheet. A plurality of first fixing strips are equidistantly connected to one side of the outer protective sheet, and a plurality of second fixing strips are equidistantly connected to the other side of the outer protective sheet.

[0018] A fitting guard strip is installed between the first fixing strip and the second fixing strip. A first arc-shaped limiting block is installed at one end of the first fixing strip, and a second arc-shaped limiting block is installed at one end of the second fixing strip.

[0019] According to the above technical solution, the first inner protective layer, the second inner protective layer, the third inner protective layer and the fourth inner protective layer are respectively attached to the separator bar;

[0020] Both the first arc-shaped limiting block and the second arc-shaped limiting block are engaged and fitted with the arc-shaped contact surface.

[0021] According to the above technical solution, the first fixing strip, the second fixing strip, the adhesive strip, the first arc-shaped limiting block and the second arc-shaped limiting block outside the first inner protective layer, the second inner protective layer, the third inner protective layer and the fourth inner protective layer are limiting and separating components. The limiting and separating components have the same structure and are staggered in position.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] 1. By setting a first wear-resistant indicator strip, a second wear-resistant indicator strip, a first limiting block, a second limiting block, an indicator groove, a V-shaped groove, an annular chamber, a display hole, an auxiliary ring, an annular groove, and an auxiliary opening, a wire stripping tool is used to cut from the positions of the first and second wear-resistant indicator strips. When selecting the cutting position, the position between the two indicator grooves is chosen, because the position between the two indicator grooves is also the position between the two display holes. Due to the setting of the V-shaped groove, this position is left empty. When cutting to this position, it can be clearly felt that the outer fixing shell has been cut through and entered this empty position, which makes it convenient for the operator to judge the cutting depth and position, and can better cut the outer fixing shell, reducing damage to the middle flame-retardant shell when cutting the outer fixing shell. The auxiliary ring and auxiliary opening can be seen on the outside of the middle flame-retardant shell. The auxiliary opening is used as the cutting entry point, making it easier to peel off the middle flame-retardant shell.

[0024] 2. By setting up a middle partition strip, an arc-shaped bonding surface, an outer ring, a separator rod, an outer sheath, a first fixing strip, a second fixing strip, a bonding strip, a first arc-shaped limiting block, and a second arc-shaped limiting block, the outer sheath of the cable's inner sheath is pulled outward. The first and second arc-shaped limiting blocks separate from the middle partition strip. Then, the cable core is cut. Since the outer sheath of the cable is connected to the arc-shaped bonding surface of the middle partition strip by the first and second arc-shaped limiting blocks respectively, the inner sheath of the cable can be separated individually. Even if one inner sheath of the cable is cut and connected, the other inner sheaths of the cable can still remain stable. The outer sheath, the first fixing strip, and the second fixing strip can all remain stable, playing a protective role, reducing damage to the connection point, and making the connection safer.

[0025] In summary, by setting two abrasion-resistant indicator strips corresponding to the V-shaped groove, cutting can be performed directly between the two indicator strips, making it easier to find the cutting depth and reducing damage to the central flame-retardant shell. Furthermore, cutting at the auxiliary opening of the auxiliary ring makes cutting easier. Finally, the inner sheath of the cable to be cut and connected can be pulled out, allowing the inner sheath of the cable to be separated directly, while the inner sheaths of other cables can still be stably engaged with the central partition strip, bringing convenience to the connection of low-smoke halogen-free cables. Attached Figure Description

[0026] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0027] In the attached diagram:

[0028] Figure 1 This is a schematic diagram of the structure of the present invention;

[0029] Figure 2 This is a schematic diagram of the structure of the first wear-resistant indicator strip of the present invention;

[0030] Figure 3 This is the present invention. Figure 2 Enlarged view of region A in the middle;

[0031] Figure 4 This is a schematic diagram of the structure of the first limiting block of the present invention;

[0032] Figure 5 This is a schematic diagram of the structure of the flame-retardant shell in the middle of the present invention;

[0033] Figure 6 This is a schematic diagram showing the position of the auxiliary ring in this invention;

[0034] Figure 7 This is a schematic cross-sectional view of the auxiliary ring structure of the present invention;

[0035] Figure 8 This is a schematic diagram of the structure of some of the spacers in this invention;

[0036] Figure 9 This is a schematic diagram showing the position of the first fixing strip in this invention;

[0037] Figure 10 This is a schematic diagram of the planar structure of the first fixing strip of the present invention;

[0038] Numbering on the map:

[0039] 1. Outer protective layer; 101. Outer fixing shell; 102. First wear-resistant indicator strip; 103. Second wear-resistant indicator strip; 104. Inner fixing hole; 105. Reinforcing wire; 106. Wear-resistant threaded ring; 107. Wear-resistant rope; 108. First limiting block; 109. Second limiting block; 110. Concave arc surface; 111. Indicator groove;

[0040] 2. Flame-retardant layer; 201. Central flame-retardant shell; 202. V-shaped groove; 203. V-shaped strip; 204. Annular chamber; 205. Display hole; 206. Auxiliary ring; 207. Annular groove; 208. Auxiliary port;

[0041] 3. Cable inner sheath; 301. First inner sheath; 302. Second inner sheath; 303. Third inner sheath; 304. Fourth inner sheath;

[0042] 4. Cable core;

[0043] 5. Separator; 501. Middle partition strip; 502. Arc-shaped fitting surface; 503. Outer ring; 504. Separator rod; 505. Outer protective plate; 506. First fixing strip; 507. Second fixing strip; 508. Fitting strip; 509. First arc-shaped limiting block; 510. Second arc-shaped limiting block. Detailed Implementation

[0044] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0045] Example: Figure 1-7 As shown, the present invention provides a technical solution: a convenient low-smoke halogen-free flame-retardant cable, comprising an outer sheath 1, a flame-retardant layer 2, an inner cable sheath 3, and a cable core 4. The outer sheath 1 comprises an outer fixing shell 101, a first wear-resistant indicator strip 102, a second wear-resistant indicator strip 103, an inner fixing hole 104, a reinforcing wire 105, a first limiting block 108, a second limiting block 109, and an indicator groove 111.

[0046] Four first wear-resistant indicator strips 102 are equidistantly arranged on the outside of the outer fixing shell 101. A second wear-resistant indicator strip 103 is arranged on one side of the first wear-resistant indicator strips 102. An inner fixing hole 104 is opened in the middle of the first wear-resistant indicator strips 102 and the second wear-resistant indicator strips 103. A reinforcing wire 105 is embedded in the inner fixing hole 104. A first limiting block 108 is equidistantly installed on the inner side wall of the outer fixing shell 101. A second limiting block 109 is installed on the inner side wall of the outer fixing shell 101 near the first limiting block 108. Wear-resistant threaded rings 106 are distributed in a spiral shape on the outside of the outer fixing shell 101. A wear-resistant rope 107 is embedded in the middle of the wear-resistant threaded rings 106 to increase the wear resistance and flexibility of the low smoke halogen-free cable.

[0047] Flame-retardant layer 2 includes a central flame-retardant shell 201, a V-shaped groove 202, an annular chamber 204, a display hole 205, and an auxiliary ring 206;

[0048] The outer fixed shell 101 is equipped with a central flame-retardant shell 201. A V-shaped groove 202 is provided on the outer side of the central flame-retardant shell 201. Several annular chambers 204 are provided at equal intervals on the inner wall of the central flame-retardant shell 201. An auxiliary ring 206 is snapped into the annular chamber 204. A display hole 205 is provided in the middle of the V-shaped groove 202 corresponding to the position of the annular chamber 204.

[0049] The first limiting block 108 and the second limiting block 109 are located on both sides of the display hole 205, and the first wear-resistant indicator strip 102 and the second wear-resistant indicator strip 103 are provided with indicator grooves 111 at the positions corresponding to the display hole 205.

[0050] Both sides of the first limiting block 108 and the second limiting block 109 are concave arc surface 110 structures, and the concave arc surface 110 is engaged and fitted with the V-shaped groove 202 of the central flame-retardant shell 201, so that the outer sheath 1 and the flame-retardant layer 2 of the low-smoke halogen-free cable are tightly fixed.

[0051] The outer part of the auxiliary ring 206 is exposed at the position of the display hole 205, and the exposed part of the auxiliary ring 206 is located between the first limiting block 108 and the second limiting block 109. An annular groove 207 is provided in the middle of the auxiliary ring 206, and an auxiliary opening 208 is provided on the outer side of the auxiliary ring 206 corresponding to the position of the display hole 205. This facilitates cutting the auxiliary opening 208 of the auxiliary ring 206 from the position of the display hole 205 when cutting the low-smoke halogen-free cable. Since the annular groove 207 facilitates cutting, it also facilitates wire stripping during the connection process.

[0052] like Figure 9 As shown, a V-shaped strip 203 is installed on the inner side of the central flame-retardant shell 201 at the position corresponding to the V-shaped groove 202. The interior of the central flame-retardant shell 201 is provided with four inner cable sheaths 3, namely the first inner sheath 301, the second inner sheath 302, the third inner sheath 303 and the fourth inner sheath 304. The inner core 4 of the cable is wrapped inside the first inner sheath 301, the second inner sheath 302, the third inner sheath 303 and the fourth inner sheath 304.

[0053] like Figure 8 and Figure 10As shown, a partition 5 is provided between the first inner protective layer 301, the second inner protective layer 302, the third inner protective layer 303 and the fourth inner protective layer 304. The partition 5 includes a middle partition strip 501, an arc-shaped bonding surface 502, an outer ring 503, a partition rod 504, an outer protective piece 505, a first fixing strip 506, a second fixing strip 507, a bonding strip 508, a first arc-shaped limiting block 509 and a second arc-shaped limiting block 510.

[0054] A central partition strip 501 is snapped between the first inner sheath 301, the second inner sheath 302, the third inner sheath 303, and the fourth inner sheath 304. The four outer surfaces of the central partition strip 501 are all arc-shaped contact surfaces 502. Several outer rings 503 are equidistantly fixed to the outside of the central partition strip 501. Four dividing rods 504 are connected at equal angles to the outside of the outer rings 503. The first inner sheath 301, the second inner sheath 302, the third inner sheath 303, and the fourth inner sheath 304 are respectively attached to the dividing rods 504, thereby ensuring the stability of the cable core 4 and preventing mutual compression. Outer sheaths 505 are attached to the outer surfaces of the first inner sheath 301, the second inner sheath 302, the third inner sheath 303, and the fourth inner sheath 304. Several first fixing strips 506 are equidistantly connected to one side of the outer sheath 505, and several first fixing strips 506 are equidistantly connected to the other side of the outer sheath 505. Several second fixing strips 507 are connected. A fitting strip 508 is installed between the first fixing strip 506 and the second fixing strip 507. A first arc-shaped limiting block 509 is installed at one end of the first fixing strip 506, and a second arc-shaped limiting block 510 is installed at one end of the second fixing strip 507. The first arc-shaped limiting block 509 and the second arc-shaped limiting block 510 are both snapped and fitted with the arc-shaped fitting surface 502 to improve the separation effect. The first fixing strip 506, the second fixing strip 507, the fitting strip 508, the first arc-shaped limiting block 509 and the second arc-shaped limiting block 510 outside the first inner sheath 301, the second inner sheath 302, the third inner sheath 303 and the fourth inner sheath 304 are limiting and separating components. The limiting and separating components have the same structure and are staggered in position, so that the four inner cores 4 of the cable can be limited by the limiting and separating components in sequence to maintain stability.

[0055] The working principle and usage process of the present invention are as follows: In the process of splicing low-smoke halogen-free cables, firstly select a suitable splicing position range on the cable, and then use a wire stripping tool to cut into the interior of the outer fixing shell 101 from the position of the first wear-resistant indicator strip 102 and the second wear-resistant indicator strip 103.

[0056] When selecting the cutting position, choose the position between the two indicator grooves 111, because the position between the two indicator grooves 111 is also the position between the two display holes 205. Due to the setting of the V-shaped groove 202, this position is left empty. When cutting to this position, you can clearly feel that you have cut through the outer fixing shell 101 and entered this empty position. This makes it easier for the operator to judge the cutting depth and position, and can cut the outer fixing shell 101 better, reducing the damage to the middle flame-retardant shell 201 when cutting the outer fixing shell 101.

[0057] When cutting, the position of the V-shaped groove 202 that cuts into the middle flame-retardant shell 201 indicates that the wire stripping tool has penetrated into the interior of the outer fixing shell 101. The wire stripper rotates around the outside of the outer fixing shell 101 to cut it off. First, rotate and cut two places on the outer fixing shell 101, select the section that needs to be stripped off, and then cut the outer fixing shell 101 between the first wear-resistant indicator strip 102 and the second wear-resistant indicator strip 103 to strip off a section of the outer fixing shell 101 and expose the middle flame-retardant shell 201.

[0058] The exposed central flame-retardant shell 201 shows the auxiliary ring 206 and the auxiliary opening 208. Then, select a suitable auxiliary ring 206, use the auxiliary opening 208 as the cutting point, rotate and cut the central flame-retardant shell 201, and then cut it horizontally along the central flame-retardant shell 201 to peel it open.

[0059] After peeling back the inner sheath 3 of the cable, select from the first inner sheath 301, second inner sheath 302, third inner sheath 303, and fourth inner sheath 304 to choose the one to be connected. Then pull the outer sheath 505 of the selected inner sheath 3 outwards until the first arc-shaped limiting block 509 and the second arc-shaped limiting block 510 separate from the middle partition strip 501. Then cut the inner core 4 of the cable at the connection point to be connected, and the subsequent connection can be carried out. The first arc-shaped limiting block 509 and the second arc-shaped limiting block 510 are respectively engaged with the arc-shaped contact surface 502 of the middle partition strip 501, thus allowing the inner sheath 3 of the cable to be separated individually. Even if one inner sheath 3 of the cable is cut and connected, the other inner sheaths 3 of the cable can still remain stable, and the outer protective plate 505, the first fixing strip 506 and the second fixing strip 507 can also remain stable, playing a protective role, reducing damage to the connection position, and making the connection safer.

[0060] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A convenient low-smoke halogen-free flame-retardant cable, comprising an outer sheath (1), a flame-retardant layer (2), an inner sheath (3), and a cable core (4), characterized in that: The outer protective layer (1) includes an outer fixing shell (101); Four first wear-resistant indicator strips (102) are equidistantly arranged on the outside of the outer fixed shell (101). A second wear-resistant indicator strip (103) is arranged on one side of the first wear-resistant indicator strips (102). An inner fixing hole (104) is opened in the middle of the first wear-resistant indicator strips (102) and the second wear-resistant indicator strips (103). A reinforcing wire (105) is embedded in the inner fixing hole (104). A first limiting block (108) is equidistantly installed on the inner side wall of the outer fixed shell (101). A second limiting block (109) is installed on the inner side wall of the outer fixed shell (101) near the first limiting block (108). The flame-retardant layer (2) includes a central flame-retardant shell (201). The outer fixed shell (101) is equipped with a central flame-retardant shell (201). A V-shaped groove (202) is provided on the outer side of the central flame-retardant shell (201). Several annular chambers (204) are provided at equal intervals in the middle of the inner wall of the central flame-retardant shell (201). An auxiliary ring (206) is snapped into the annular chamber (204). A display hole (205) is provided in the middle of the V-shaped groove (202) at the position corresponding to the annular chamber (204). The first limiting block (108) and the second limiting block (109) are located on both sides of the display hole (205), and the first wear-resistant indicator strip (102) and the second wear-resistant indicator strip (103) are provided with indicator grooves (111) at the positions corresponding to the display hole (205). The interior of the central flame-retardant shell (201) is provided with four inner cable sheaths (3), namely the first inner sheath (301), the second inner sheath (302), the third inner sheath (303) and the fourth inner sheath (304). A partition member (5) is provided between the first inner protective layer (301), the second inner protective layer (302), the third inner protective layer (303) and the fourth inner protective layer (304), and the partition member (5) includes a middle partition strip (501); A middle partition strip (501) is snapped between the first inner protective layer (301), the second inner protective layer (302), the third inner protective layer (303), and the fourth inner protective layer (304). The four outer sides of the middle partition strip (501) are all arc-shaped fitting surfaces (502). Several outer rings (503) are fixed at equal intervals to the outside of the middle partition strip (501). Four separator rods (504) are connected at equal angles to the outside of the outer rings (503). The outer sides of the first inner protective layer (301), the second inner protective layer (302), the third inner protective layer (303) and the fourth inner protective layer (304) are all fitted with an outer protective sheet (505). A plurality of first fixing strips (506) are equidistantly connected to one side of the outer protective sheet (505), and a plurality of second fixing strips (507) are equidistantly connected to the other side of the outer protective sheet (505). A fitting guard strip (508) is installed between the first fixing strip (506) and the second fixing strip (507). A first arc-shaped limiting block (509) is installed at one end of the first fixing strip (506), and a second arc-shaped limiting block (510) is installed at one end of the second fixing strip (507).

2. The convenient low-smoke halogen-free flame-retardant cable according to claim 1, characterized in that: The outer fixed shell (101) has wear-resistant threaded rings (106) distributed in a spiral shape on the outside, and wear-resistant ropes (107) are embedded in the middle of the wear-resistant threaded rings (106).

3. The convenient low-smoke halogen-free flame-retardant cable according to claim 1, characterized in that: Both sides of the first limiting block (108) and the second limiting block (109) are concave arc surface (110) structures, and the concave arc surface (110) is engaged and fitted with the V-shaped groove (202) of the central flame-retardant shell (201).

4. The convenient low-smoke halogen-free flame-retardant cable according to claim 1, characterized in that: The outside of the auxiliary ring (206) is exposed at the display hole (205) position, and the exposed part of the auxiliary ring (206) is located between the first limiting block (108) and the second limiting block (109).

5. A convenient low-smoke halogen-free flame-retardant cable according to claim 1, characterized in that: An annular groove (207) is provided in the middle of the auxiliary ring (206), and an auxiliary opening (208) is provided on the outer side of the auxiliary ring (206) at the position corresponding to the display hole (205).

6. A convenient low-smoke halogen-free flame-retardant cable according to claim 1, characterized in that: A V-shaped strip (203) is installed on the inner side of the central flame-retardant shell (201) at the position corresponding to the V-shaped groove (202). The first inner sheath (301), the second inner sheath (302), the third inner sheath (303) and the fourth inner sheath (304) are all wrapped with cable core (4).

7. A convenient low-smoke halogen-free flame-retardant cable according to claim 6, characterized in that: The first inner protective layer (301), the second inner protective layer (302), the third inner protective layer (303) and the fourth inner protective layer (304) are respectively attached to the partition rod (504); The first arc-shaped limiting block (509) and the second arc-shaped limiting block (510) are both snapped into and attached to the arc-shaped contact surface (502).

8. A convenient low-smoke halogen-free flame-retardant cable according to claim 7, characterized in that: The first fixing strip (506), the second fixing strip (507), the fitting strip (508), the first arc-shaped limiting block (509), and the second arc-shaped limiting block (510) outside the first inner protective layer (301), the second inner protective layer (302), the third inner protective layer (303), and the fourth inner protective layer (304) are limiting and separating components. The limiting and separating components have the same structure and are staggered in position.

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