High-flame-retardant polypropylene net-shaped filling rope

Abstract

The utility model discloses a high flame retardant polypropylene netted filling rope, which comprises a large strand rope, a plurality of groups of small strand ropes and a polypropylene netted sheet body, the surfaces of the plurality of groups of small strand ropes are all provided with mylar sheets, and the surfaces of the plurality of groups of mylar sheets are all provided with aramid fiber layers. A first flame-retardant layer is arranged on the surface of the large-strand rope, a second flame-retardant layer is arranged on the surface of the first flame-retardant layer, flame-retardant resin is arranged on the surface of the second flame-retardant layer, multiple sets of convex blocks are embedded in the outer portion of the flame-retardant resin, and the surfaces of the flame-retardant resin and the surfaces of the convex blocks are coated with fireproof coating layers. And a steel wire is mounted between every two adjacent groups of convex blocks. The high-flame-retardant polypropylene net-shaped filling rope has the beneficial effects that the convex blocks are adopted, the friction force of the outer wall of the filling rope can be increased through the convex blocks, the filling rope is prevented from moving out of a cable, and the use practicability of the high-flame-retardant polypropylene net-shaped filling rope is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of filling ropes, in particular to a highly flame-retardant polypropylene mesh filling rope. Background Art

[0002] The filling rope is made of polypropylene resin as the base material, with modifiers and other processing aids added, and is made through high-speed stirring, plasticizing and granulation. The filling rope has the advantages of good fluidity, stable structure, good use effect, long service life and low cost. It is mainly used for filling in optical cables and electrical cables to avoid gaps between the cores.

[0003] The prior art discloses a highly flame-retardant polypropylene mesh filling rope with a publication number of CN207376363U, comprising a filling rope, a small strand rope, a polypropylene mesh sheet, a Mylar sheet, an aramid fiber layer, a large strand rope, a fire-retardant coating layer, a conductor, a first shielding layer, a cable core and a second shielding layer. The aramid fiber layer is used as the first flame-retardant barrier. The aramid fiber does not decompose or melt at a temperature of 560 degrees, and can effectively play a flame-retardant effect. In addition, it also has excellent properties such as ultra-high strength, high modulus, high temperature resistance, acid and alkali resistance, and light weight. Its strength is 5-6 times that of steel wire, its modulus is 2-3 times that of steel wire or glass fiber, its toughness is 2 times that of steel wire, and its weight is only about 1 / 5 of that of steel wire. The method of arranging an aramid fiber layer on the small strand rope of polypropylene can enhance the strength and toughness of the filling rope, increase its service life, and it will not rot when filled in the cable for a long time. Preferably, the thickness of the aramid fiber layer is 0.8-0.1 microns. The thickness of the aramid fiber layer should not affect the tightness of the filling rope after filling, the roundness of the cross section, etc., so the thickness should be moderate. Through the action of the aramid fiber layer and the fire retardant coating layer, the filling rope of the polypropylene material has a high flame retardant effect.

[0004] In the above utility model, the filling rope is located between the first shielding layer and the second shielding layer, and the outermost wall of the filling rope is provided with a fire retardant coating layer, which cannot increase the friction between the filling rope and the first shielding layer and the second shielding layer. When the filling rope or the core is pulled, the filling rope or the core is easily moved out of the second shielding layer, thereby reducing the practicality of the utility model.

[0005] Currently, no effective solution has been proposed for the problems in the related technologies. Utility Model Content

[0006] 1. Technical issues to be solved

[0007] In view of the deficiencies in the prior art, the utility model provides a highly flame-retardant polypropylene mesh filling rope, which has the advantage of being able to increase the friction of the outer wall of the filling rope and prevent it from moving out of the interior of the cable, thereby solving the problems in the above-mentioned background technology.

[0008] (II) Technical solution

[0009] In order to achieve the above-mentioned advantage of increasing the friction force of the outer wall of the filling rope and preventing it from moving out of the interior of the cable, the specific technical solution adopted by the utility model is as follows:

[0010] A highly flame-retardant polypropylene mesh filling rope comprises a large strand rope, a small strand rope and a polypropylene mesh sheet body, wherein the small strand rope is provided in multiple groups, the surfaces of the multiple groups of small strand ropes are all provided with Mylar sheets, and the surfaces of the multiple groups of Mylar sheets are all provided with aramid fiber layers, the surface of the large strand rope is provided with a first flame-retardant layer, and the surface of the first flame-retardant layer is provided with a second flame-retardant layer, the surface of the second flame-retardant layer is provided with a flame-retardant resin, the outside of the flame-retardant resin is embedded with multiple groups of convex blocks, the surfaces of the flame-retardant resin and the multiple groups of convex blocks are coated with fire-retardant coating layers, and steel wires are installed between two adjacent groups of convex blocks.

[0011] Furthermore, the plurality of groups of convex blocks are all made of modified plastic.

[0012] Furthermore, the fire retardant coating layer is an aluminum-magnesium flame retardant.

[0013] Furthermore, a plurality of groups of flame-retardant non-woven fabrics are bonded between the first flame-retardant layer and the second flame-retardant layer, and a halogen-free flame retardant is arranged between the first flame-retardant layer and the second flame-retardant layer.

[0014] Furthermore, the halogen-free flame retardant is in powder form.

[0015] Furthermore, the first flame retardant layer and the second flame retardant layer are both composed of a natural mica inner layer and a ceramic fiber outer layer.

[0016] Furthermore, the large strand rope is made by winding and bonding multiple groups of the small strand ropes.

[0017] Furthermore, the plurality of groups of small strands of rope are twisted from polypropylene mesh sheets.

[0018] (III) Beneficial effects

[0019] Compared with the prior art, the utility model provides a highly flame-retardant polypropylene mesh filling rope, which has the following beneficial effects:

[0020] (1) The utility model adopts a convex block. When the high flame retardant polypropylene mesh filling rope is actually used, it needs to be placed between multiple groups of wire cores and then the wrapping process is carried out. During this process, the wrapped shielding layer will wrap the multiple groups of wire cores and the high flame retardant polypropylene mesh filling rope. Due to the presence of multiple groups of convex blocks, the protrusions of the multiple groups of convex blocks will squeeze the outer walls of the multiple groups of wire cores and the inner walls of the shielding layer, so that the outer walls of the multiple groups of wire cores and the inner walls of the shielding layer form depressions, thereby increasing the friction between the high flame retardant polypropylene mesh filling rope and the multiple groups of wire cores and the shielding layer. Multiple groups of steel wires increase the stability of the multiple groups of convex blocks. By setting the convex blocks, the friction of the outer wall of the filling rope can be increased to avoid moving out of the cable, thereby improving the practicality of the high flame retardant polypropylene mesh filling rope.

[0021] (2) The utility model adopts a first flame retardant layer and a second flame retardant layer. Before the wrapping process, the highly flame retardant polypropylene mesh filling rope needs to be moved to a suitable position. When the highly flame retardant polypropylene mesh filling rope is pierced by a foreign object, the foreign object is removed. Due to the holes on the surfaces of the first flame retardant layer and the second flame retardant layer, the halogen-free flame retardant between the first flame retardant layer and the second flame retardant layer will be discharged through the holes. The operator can know whether the highly flame retardant polypropylene mesh filling rope is damaged through the removed halogen-free flame retardant. The multiple groups of flame retardant non-woven fabrics play the role of connecting the first flame retardant layer and the second flame retardant layer. The first flame retardant layer and the second flame retardant layer are set to remind the operator whether the filling rope is damaged, thereby adding a breakage reminder function to the highly flame retardant polypropylene mesh filling rope. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 This is a structural schematic diagram of a highly flame-retardant polypropylene mesh filling rope proposed by the utility model;

[0024] Figure 2 It is a cross-sectional schematic diagram of the small strand rope proposed by the utility model;

[0025] Figure 3 It is a three-dimensional diagram of the convex block proposed by the utility model;

[0026] Figure 4 The utility model proposes Figure 1 A is an enlarged view of the middle image.

[0027] In the figure:

[0028] 1. Large strand rope; 2. Small strand rope; 3. Polypropylene mesh sheet; 4. Mylar sheet; 5. Aramid fiber layer; 6. First flame retardant layer; 7. Second flame retardant layer; 8. Flame retardant resin; 9. Convex block; 10. Fire retardant coating layer; 11. Steel wire; 12. Flame retardant non-woven fabric; 13. Halogen-free flame retardant. DETAILED DESCRIPTION

[0029] To further illustrate each embodiment, the present invention provides drawings, which are part of the disclosure of the present invention and are mainly used to illustrate the embodiments. They can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, ordinary technicians in the field should be able to understand other possible implementation methods and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0030] According to an embodiment of the utility model, a highly flame-retardant polypropylene mesh filling rope is provided.

[0031] The present invention is now further described in conjunction with the accompanying drawings and specific implementation methods. Figure 1-4 As shown, according to an embodiment of the utility model, a highly flame-retardant polypropylene mesh filling rope comprises a large rope 1, a small rope 2 and a polypropylene mesh sheet 3, the small rope 2 is provided with a plurality of groups, the surfaces of the plurality of groups of small ropes 2 are all provided with Mylar sheets 4, and the surfaces of the plurality of groups of Mylar sheets 4 are all provided with aramid fiber layers 5, the surface of the large rope 1 is provided with a first flame-retardant layer 6, and the surface of the first flame-retardant layer 6 is provided with a second flame-retardant layer 7, the surface of the second flame-retardant layer 7 is provided with a flame-retardant resin 8, the outside of the flame-retardant resin 8 is embedded with a plurality of groups of convex blocks 9, the surfaces of the flame-retardant resin 8 and the plurality of groups of convex blocks 9 are coated with a fire-retardant coating layer 10, a steel wire 11 is installed between two adjacent groups of convex blocks 9, and the convex blocks 9 are provided to increase the friction of the outer wall of the filling rope to avoid moving out of the interior of the cable, thereby improving the practicality of the highly flame-retardant polypropylene mesh filling rope.

[0032] In one embodiment, the multiple groups of convex blocks 9 are all made of modified plastics, and the modified plastics are flame retardant.

[0033] In one embodiment, the fire retardant coating layer 10 is an aluminum-magnesium flame retardant.

[0034] In one embodiment, a plurality of groups of flame-retardant non-woven fabrics 12 are bonded between the first flame-retardant layer 6 and the second flame-retardant layer 7, and a halogen-free flame retardant 13 is arranged between the first flame-retardant layer 6 and the second flame-retardant layer 7. The first flame-retardant layer 6 and the second flame-retardant layer 7 can remind the operator whether the filling rope is damaged, thereby adding a breakage reminder function to the highly flame-retardant polypropylene mesh filling rope.

[0035] In one embodiment, the halogen-free flame retardant 13 is in powder form.

[0036] In one embodiment, the first flame retardant layer 6 and the second flame retardant layer 7 are both composed of an inner layer of natural mica and an outer layer of ceramic fibers.

[0037] In one embodiment, the large strand rope 1 is made by winding and bonding a plurality of small strand ropes 2 .

[0038] In one embodiment, the plurality of groups of small strands 2 are twisted from polypropylene mesh sheets 3 .

[0039] Working principle:

[0040] When the highly flame-retardant polypropylene mesh filling rope is actually used, it needs to be placed between multiple groups of wire cores, and then the wrapping process is carried out. During this process, the wrapped shielding layer will wrap the multiple groups of wire cores and the highly flame-retardant polypropylene mesh filling rope. Due to the presence of multiple groups of convex blocks 9, the protrusions of the multiple groups of convex blocks 9 will squeeze the outer walls of the multiple groups of wire cores and the inner walls of the shielding layer, so that the outer walls of the multiple groups of wire cores and the inner walls of the shielding layer form depressions, thereby increasing the friction between the highly flame-retardant polypropylene mesh filling rope and the multiple groups of wire cores and the shielding layer. The convex blocks 9 are set to increase the friction of the outer wall of the filling rope to avoid moving out of the cable. Multiple groups of steel wires 11 increase the stability of the multiple groups of convex blocks 9, thereby improving the practical use of the highly flame-retardant polypropylene mesh filling rope. At the same time, before the wrapping process, the high flame retardant polypropylene mesh filling rope needs to be moved to a suitable position. When the high flame retardant polypropylene mesh filling rope is pierced by a foreign object, the foreign object is removed. Due to the holes on the surface of the first flame retardant layer 6 and the second flame retardant layer 7, the halogen-free flame retardant 13 between the first flame retardant layer 6 and the second flame retardant layer 7 will be discharged through the holes. The operator can know whether the high flame retardant polypropylene mesh filling rope is damaged through the removed halogen-free flame retardant 13. The multiple groups of flame retardant non-woven fabrics 12 play the role of connecting the first flame retardant layer 6 and the second flame retardant layer 7. The first flame retardant layer 6 and the second flame retardant layer 7 are set to remind the operator whether the filling rope is damaged, thereby adding a breakage reminder function to the high flame retardant polypropylene mesh filling rope.

[0041] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A highly flame-retardant polypropylene mesh filling rope, characterized in that: The invention comprises a large strand rope (1), a small strand rope (2) and a polypropylene mesh sheet (3), wherein the small strand rope (2) is provided in a plurality of groups, the surfaces of the plurality of groups of the small strand rope (2) are all provided with Mylar sheets (4), and the surfaces of the plurality of groups of the Mylar sheets (4) are all provided with aramid fiber layers (5), the surface of the large strand rope (1) is provided with a first flame retardant layer (6), and the surface of the first flame retardant layer (6) is provided with a second flame retardant layer (7), the surface of the second flame retardant layer (7) is provided with a flame retardant resin (8), the outside of the flame retardant resin (8) is embedded with a plurality of groups of convex blocks (9), the surfaces of the flame retardant resin (8) and the plurality of groups of the convex blocks (9) are coated with a fire retardant coating layer (10), and a steel wire (11) is installed between two adjacent groups of the convex blocks (9).

2. A highly flame-retardant polypropylene mesh filling rope according to claim 1, characterized in that: The plurality of groups of convex blocks (9) are all made of modified plastics.

3. The highly flame-retardant polypropylene mesh filling rope according to claim 1, characterized in that: The fire retardant coating layer (10) is an aluminum-magnesium flame retardant.

4. The highly flame-retardant polypropylene mesh filling rope according to claim 1, characterized in that: A plurality of groups of flame-retardant non-woven fabrics (12) are bonded between the first flame-retardant layer (6) and the second flame-retardant layer (7), and a halogen-free flame retardant (13) is provided between the first flame-retardant layer (6) and the second flame-retardant layer (7).

5. The highly flame-retardant polypropylene mesh filling rope according to claim 4, characterized in that: The halogen-free flame retardant (13) is in powder form.

6. The highly flame-retardant polypropylene mesh filling rope according to claim 4, characterized in that: The first flame retardant layer (6) and the second flame retardant layer (7) are both composed of a natural mica inner layer and a ceramic fiber outer layer.

7. The highly flame-retardant polypropylene mesh filling rope according to claim 1, characterized in that: The large strand rope (1) is made by winding and bonding a plurality of groups of the small strand ropes (2).

8. The highly flame-retardant polypropylene mesh filling rope according to claim 1, characterized in that: The plurality of groups of small strands of rope (2) are twisted by using polypropylene mesh sheets (3).

Images