Halogen-free low-smoke flame-retardant fireproof cable
By adopting a combined structure of internal and external flame retardant layers and reinforcement ribs in halogen-free low-smoke flame retardant and flame retardant cables, the problem of independent distribution of reinforcement ribs and flame retardant layers is solved, and the strength and flame retardant performance of the cable are improved, ensuring that in fire The stability and power-on capacity in the case, while maintaining the environmentally friendly halogen-free properties.
Patent Information
- Application Number
- CN202421175071.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-28
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2034-05-28
AI Technical Summary
In existing halogen-free low-smoke flame-retardant and refractory cables, reinforcement ribs, spiral armor and flame-retardant layers are independently distributed, and cannot be connected with each other, resulting in insufficient strength to meet the flame-retardant performance requirements.
The combination structure of the inner and outer flame retardant layer and reinforcement ribs is adopted. Through the cooperation of the axial ribs and spiral ribs, the tension, bending and torque of the cable are increased, and the design of the fitting grooves and fitting pieces ensures the reinforcement. The positioning and connection of the ribs form a complete support structure.
It improves the strength and flame retardant performance of the cable, ensures the stability and power-on capacity of the cable in the event of fire, while maintaining the environmentally friendly and halogen-free properties.
Smart Images
Figure CN222319801U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of low-smoke halogen-free cables, in particular to a halogen-free, low-smoke, flame-retardant and fire-resistant cable. Background Art
[0002] Halogen-free low-smoke flame-retardant fire-resistant cable is a cable that can meet specific requirements when a fire occurs. The main features of this cable are as follows;
[0003] 1. Low smoke: In the event of a fire, the smoke released by the cable will not affect people's vision, nor will it cause difficulties for firefighters to rescue. Low smoke cables can reduce the harm of smoke to the human body and effectively protect the safety of personnel;
[0004] 2. Halogen-free: Ordinary cables usually use materials containing halogen elements such as chlorine and bromine, which will release a large amount of toxic gases in a fire. Halogen-free low-smoke flame-retardant cables use materials that do not contain halogen elements, and the gases released are non-toxic and harmless, which is beneficial to environmental protection and human health;
[0005] 3. Flame retardant: This type of cable will not ignite or continue to burn when exposed to fire. It has excellent flame retardant properties and can keep the circuit open during a fire, protecting the safety of personnel and equipment.
[0006] 4. Fire resistance: In case of fire, halogen-free low-smoke flame-retardant fire-resistant cables can prevent the spread of flames and maintain normal power supply for a period of time, providing valuable time for evacuation and rescue;
[0007] At present, some halogen-free cables have reinforcing ribs or spirally wound armor layers added inside the cables to increase strength and toughness. In order to meet the flame retardant performance, a separate flame retardant layer needs to be added. However, the reinforcing ribs, spiral armor, and flame retardant layers are all independently distributed, with independent structures and average strength, and cannot be connected to each other.
[0008] In order to solve the above problems, the present application proposes a halogen-free, low-smoke, flame-retardant and fire-resistant cable. Utility Model Content
[0009] The utility model aims to provide a halogen-free, low-smoke, flame-retardant and fire-resistant cable, which solves the problems raised in the above-mentioned background technology.
[0010] In order to solve the above technical problems, the utility model is realized by the following technical solutions:
[0011] The utility model is a halogen-free, low-smoke, flame-retardant, fire-resistant cable, comprising an inner core, a filling layer is arranged outside the inner core, an inner flame-retardant layer is arranged outside the filling layer, an outer flame-retardant strip is wrapped outside the inner flame-retardant layer, a plurality of outer flame-retardant strips are arranged, the outer portion of the inner flame-retardant layer is wrapped by the plurality of outer flame-retardant strips after merging, reinforcing ribs are arranged between the inner flame-retardant layer and the outer flame-retardant strips, an interlocking groove for embedding the reinforcing ribs is arranged between the outer portion of the inner flame-retardant layer and the inner side of the outer flame-retardant strips, and the outer portion is coated with a low-smoke, halogen-free environmentally friendly layer;
[0012] The reinforcing ribs include axial ribs and spiral ribs, and the reinforcing ribs are composed of continuous axial ribs and spiral ribs.
[0013] Furthermore, the reinforcing ribs are multiple and circumferentially distributed, the number of the outer flame-retardant strips is the same as the number of the reinforcing ribs, and the reinforcing ribs are arranged between each outer flame-retardant strip and the inner flame-retardant layer.
[0014] Furthermore, the embedding grooves include radial grooves and spiral grooves, and the embedding grooves are the same in number as the outer flame retardant strips and reinforcing ribs and are distributed in a corresponding circumferential manner.
[0015] Furthermore, the reinforcing ribs are symmetrically distributed between the inner flame retardant layer and the outer flame retardant strip.
[0016] Furthermore, the radial grooves are correspondingly engaged with the axial ribs, the spiral ribs are correspondingly engaged with the spiral grooves, and the two groups of engaged grooves between the inner flame retardant layer and the outer flame retardant strips wrap the outside of the reinforcing ribs.
[0017] Furthermore, both sides of the outer flame retardant strip are provided with integrally connected engaging pieces and an engaging opening formed between two adjacent engaging pieces.
[0018] Furthermore, the interlocking pieces and the interlocking openings between two adjacent outer flame-retardant strips are interlocked and connected and wrapped around the outside of the inner flame-retardant layer.
[0019] The utility model has the following beneficial effects:
[0020] The utility model provides an inner flame retardant layer and an outer flame retardant strip distributed inside and outside, and then adds reinforcing ribs between the two flame retardant layers. The reinforcing ribs can not only strengthen the cable strength, but also do not affect the performance of the flame retardant layer. Secondly, the reinforcing ribs are arranged as a matching structure of axial ribs and spiral ribs, which can simultaneously increase the axial tensile force, radial bending force, and circumferential torsion force, thereby improving the cable performance.
[0021] The utility model arranges the outer flame retardant strips into a multi-piece assembly structure, which can facilitate the shaping and positioning of the reinforcing ribs inside the cable. At the same time, the interlocking pieces and interlocking openings arranged between adjacent outer flame retardant strips can also ensure the structural stability of the entire outer flame retardant layer after cooperation.
[0022] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are 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 creative work.
[0024] Figure 1 This is a schematic diagram of the overall appearance structure of the utility model;
[0025] Figure 2 for Figure 1 Schematic diagram of the structure from a bird's-eye view;
[0026] Figure 3 for Figure 1 A schematic diagram of the structure from the rear;
[0027] Figure 4 It is a schematic diagram of the structure of the exploded connection between the inner and outer flame retardant layers and the reinforcing ribs in the utility model;
[0028] In the accompanying drawings, the components represented by the reference numerals are listed as follows:
[0029] In the figure: 1. inner core; 2. filling layer; 3. inner flame retardant layer; 4. outer flame retardant strip; 41. fitting piece; 42. fitting mouth; 5. reinforcing rib; 51. axial rib; 52. spiral rib; 6. fitting groove; 61. radial groove; 62. spiral groove; 7. low smoke halogen-free environmentally friendly layer. DETAILED DESCRIPTION
[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0031] In the description of the present invention, it should be understood that terms such as "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.
[0032] See also Figure 1-4 As shown, the utility model is a halogen-free, low-smoke, flame-retardant and fire-resistant cable, comprising an inner core 1, a filling layer 2 is arranged on the outside of the inner core 1, an inner flame-retardant layer 3 is arranged on the outside of the filling layer 2, the inner flame-retardant layer 3 is wrapped with an outer flame-retardant strip 4 on the outside, the outer flame-retardant strip 4 is arranged in multiple strips, the inner flame-retardant layer 3 is wrapped by the multiple outer flame-retardant strips 4 after merging, a reinforcing rib 5 is arranged between the inner flame-retardant layer 3 and the outer flame-retardant strip 4, an interlocking groove 6 for embedding the reinforcing rib 5 is arranged between the outside of the inner flame-retardant layer 3 and the inner side of the outer flame-retardant strip 4, the outside is coated with a low-smoke, halogen-free environmentally friendly layer 7, the reinforcing rib 5 comprises an axial rib 51 and a spiral rib 52, and the reinforcing rib 5 is composed of continuous axial ribs 51 and spiral ribs 52.
[0033] Among them, the reinforcing ribs 5 are multiple and distributed in a circle, the number of the outer flame retardant strips 4 is the same as the reinforcing ribs 5, and the reinforcing ribs 5 are arranged between each outer flame retardant strip 4 and the inner flame retardant layer 3. In this embodiment, the circumferentially distributed reinforcing ribs 5 can form a complete supporting structure inside the cable to improve durability. The specific number is adjusted according to actual usage requirements.
[0034] Among them, the interlocking groove 6 includes a radial groove 61 and a spiral groove 62. The number of the interlocking grooves 6, the outer flame retardant strip 4, and the reinforcing rib 5 are the same and they are distributed in a corresponding circular pattern. In this embodiment, multiple interlocking grooves 6 are provided to ensure the connection between the reinforcing rib 5 and the inner flame retardant layer 3 and the outer flame retardant strip 4, and multiple outer flame retardant strips 4 are provided to facilitate the assembly of the reinforcing rib 5.
[0035] Among them, the reinforcing ribs 5 are symmetrically distributed between the inner flame retardant layer 3 and the outer flame retardant strip 4. In this embodiment, the symmetrically distributed reinforcing ribs 5 uniformly ensure the connection reliability between the inner flame retardant layer 3 and the outer flame retardant strip 4. The symmetrically arranged reinforcing ribs 5 have the highest structural stability between the inner flame retardant layer 3 and the outer flame retardant strip 4.
[0036] Among them, the radial groove 61 is embedded in the axial rib 51, and the spiral rib 52 is embedded in the spiral groove 62. The two sets of embedded grooves 6 between the inner flame retardant layer 3 and the outer flame retardant strip 4 wrap the outside of the reinforcing rib 5. In this embodiment, after the reinforcing rib 5 is located at the connection between the inner flame retardant layer 3 and the outer flame retardant strip 4, there is no gap between the two, which can ensure that the reinforcing rib 5 exerts its structural characteristics inside the flame retardant layer without affecting the flame retardant effect of the flame retardant layer.
[0037] Among them, both sides of the outer flame retardant strip 4 are provided with an integrally connected interlocking piece 41 and an interlocking opening 42 formed between two adjacent interlocking pieces 41. In this embodiment, multiple outer flame retardant strips 4 are completely wrapped around the outside of the inner flame retardant layer 3 after being interlocked through the interlocking piece 41 and the interlocking opening 42, which facilitates the assembly of the reinforcing rib 5 while ensuring the flame retardant effect of the outer flame retardant layer.
[0038] Among them, the interlocking piece 41 and the interlocking opening 42 between two adjacent outer flame-retardant strips 4 are interlocked and connected and wrapped around the outside of the inner flame-retardant layer 3. In this embodiment, the setting of the interlocking piece 41 and the interlocking opening 42 can effectively improve the structural strength of multiple outer flame-retardant strips 4 after being connected, compared with ordinary plane contact, thereby ensuring the performance of the flame-retardant layer.
[0039] It can be understood that, first, the reinforcing ribs 5 are arranged inside the flame retardant layer, and special-shaped reinforcing ribs 5 and fitting grooves 6 are arranged. Through the special-shaped structure, the axial tensile resistance, radial bending resistance, and circumferential torsional resistance can be increased at the same time, thereby improving the cable performance. Secondly, multiple pieces of external flame retardant strips 4 are arranged to be assembled into an external flame retardant layer, which is convenient for the assembly of the reinforcing ribs 5. At the same time, the structural reliability of the external flame retardant layer can be ensured by the provided fitting pieces 41 and fitting openings 42.
[0040] A specific application of this embodiment is that the inner core 1 is coated with a double-layer fire-resistant mica tape, the fitting groove 6 on the outer side of the inner flame retardant layer 3 and the inner side of the outer flame retardant strip 4 can be formed by cutting or the like, the fitting groove 6 in the outer flame retardant strip 4 can also be formed by injection molding or the like, and the reinforcing rib 5 can be formed by a bending device;
[0041] The inner flame retardant layer 3 is formed on the outside of the filling layer 2, and then the reinforcing rib 5 is placed in the interlocking groove 6, and then the outer flame retardant strip 4 is covered on the outside of the inner flame retardant layer 3. Through the connection between multiple outer flame retardant strips 4, the reinforcing rib 5 is wrapped in the interlocking groove 6 between the inner and outer flame retardant layers. During the connection process of multiple outer flame retardant strips 4, adjacent interlocking pieces 41 and interlocking openings 42 are interlocked with each other; connected, and finally a complete outer flame retardant layer is formed on the outside of the inner flame retardant layer 3, and finally the low-smoke halogen-free environmentally friendly layer 7 is coated on the outside of the outer flame retardant strip 4.
[0042] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0043] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.
Claims
1. A halogen-free, low-smoke, flame-retardant and fire-resistant cable, comprising an inner core (1), a filling layer (2) is arranged outside the inner core (1), and an inner flame-retardant layer (3) is arranged outside the filling layer (2), characterized in that: The inner flame retardant layer (3) is wrapped with an outer flame retardant strip (4) on the outside, and the outer flame retardant strip (4) is provided in a plurality of strips. The outer part of the inner flame retardant layer (3) is wrapped by the plurality of outer flame retardant strips (4) after merging. A reinforcing rib (5) is provided between the inner flame retardant layer (3) and the outer flame retardant strip (4). An engaging groove (6) for embedding the reinforcing rib (5) is provided between the outer part of the inner flame retardant layer (3) and the inner side of the outer flame retardant strip (4). The outer part is coated with a low-smoke halogen-free environmentally friendly layer (7); The reinforcing ribs (5) include axial ribs (51) and spiral ribs (52). The reinforcing ribs (5) are composed of continuous axial ribs (51) and spiral ribs (52).
2. The halogen-free, low-smoke, flame-retardant and fire-resistant cable according to claim 1, characterized in that: The reinforcing ribs (5) are multiple and circumferentially distributed, the number of the outer flame retardant strips (4) is the same as the number of the reinforcing ribs (5), and the reinforcing ribs (5) are arranged between each outer flame retardant strip (4) and the inner flame retardant layer (3).
3. The halogen-free, low-smoke, flame-retardant and fire-resistant cable according to claim 1, characterized in that: The embedding groove (6) comprises a radial groove (61) and a spiral groove (62); the embedding groove (6) has the same number as the outer flame retardant strip (4) and the reinforcing rib (5) and is distributed in a corresponding circumferential manner.
4. The halogen-free, low-smoke, flame-retardant and fire-resistant cable according to claim 3, characterized in that: The reinforcing ribs (5) are symmetrically distributed between the inner flame retardant layer (3) and the outer flame retardant strip (4).
5. The halogen-free, low-smoke, flame-retardant and fire-resistant cable according to claim 4, characterized in that: The radial groove (61) is correspondingly engaged with the axial rib (51), the spiral rib (52) is correspondingly engaged with the spiral groove (62), and the two groups of engaging grooves (6) between the inner flame retardant layer (3) and the outer flame retardant strip (4) wrap the outside of the reinforcing rib (5).
6. The halogen-free, low-smoke, flame-retardant and fire-resistant cable according to claim 1, characterized in that: Both sides of the outer flame retardant strip (4) are provided with integrally connected engaging pieces (41) and engaging openings (42) formed between two adjacent engaging pieces (41).
7. The halogen-free, low-smoke, flame-retardant and fire-resistant cable according to claim 6, characterized in that: The interlocking pieces (41) and the interlocking openings (42) between two adjacent outer flame-retardant strips (4) are interlocked and connected and wrapped around the outside of the inner flame-retardant layer (3).