Fire resistant flame retardant cable jacket

Abstract

The utility model discloses a kind of fire-resistant flame-retardant cable protection sleeve, it is related to cable protection technical field, including from outside to inside sequentially arranged outer layer, middle layer and inner layer, the outer layer is fire-resistant flame-retardant layer, the middle layer is flexible reinforcing buffer layer, the inner layer is flexible adaptation layer.In the utility model, outer layer adopts 0.8-1.2mm dense tubular structure, effectively promotes fire-resistant flame-retardant performance, both can block flame spread, also solve the problem of insufficient flame-retardant effect or material in prior art too brittle, the 80-120 mesh warp-weft interwoven fiber braided net of middle layer and modification processing layer cooperate with each other, can avoid outer layer cracking by self elastic buffer effect, modification processing layer can also enhance the adhesive force of middle layer and outer layer, inner layer, and the 0.3-0.5mm thickness design of middle layer, mechanical strength and structure light weight are considered, further improve the impact resistance, tensile capacity of protection sleeve, the 0.5-0.8mm thickness of inner layer and arc inner wall structure are adapted, both reduce the friction damage with cable in construction process.

Description

Technical Field

[0001] This utility model relates to the field of cable protection technology, and in particular to a fire-resistant and flame-retardant cable protection sleeve. Background Technology

[0002] In industrial production, construction projects, and other scenarios, cables, as the core carriers of power and signal transmission, often face potential risks such as high temperatures, fires, and mechanical damage. The safety and reliability requirements for external protection are extremely high. A fire-resistant and flame-retardant cable protection sleeve has emerged to meet this need. It is made of special materials such as flame-retardant plastics and ceramic composite materials, and has a tubular structure. It can achieve flame retardancy and fire isolation by inhibiting the spread of flames and reducing the release of toxic gases. It can also maintain structural stability in a fire to ensure the normal transmission function of the cable for a specified time. Furthermore, it can resist external mechanical collisions, moisture erosion, and chemical corrosion, effectively extending the service life of the cable. It has become a key component for cable protection in special risk scenarios.

[0003] However, in the existing technology, in order to achieve excellent fire resistance and flame retardant performance, a large amount of flame retardants, ceramic powder and other functional fillers need to be added to the substrate. These components will destroy the molecular chain structure of the substrate itself, reduce the flexibility and processing fluidity of the material, resulting in products that are hard and have poor bending resistance. Hard products are prone to cracking and damage during bending, dragging and pipe insertion, which increases the difficulty and cost of construction, and may also damage the protective structure in advance. Utility Model Content

[0004] The purpose of this utility model is to solve the problems existing in the prior art by proposing a fire-resistant and flame-retardant cable protection sleeve.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: comprising an outer layer, a middle layer, and an inner layer arranged sequentially from the outside to the inside, wherein the outer layer is a fire-resistant and flame-retardant layer, the middle layer is a flexible reinforced buffer layer, and the inner layer is a flexible adaptable layer; the outer layer, the middle layer, and the inner layer are formed into an integrated composite structure through a co-extrusion process; the middle layer is a fiber woven mesh structure, and the surface of the fiber woven mesh is provided with a modified treatment layer.

[0006] Preferably, the fiber woven mesh adopts a warp and weft interlacing weaving method, and the mesh count of the fiber woven mesh is 80-120 mesh.

[0007] Preferably, the outer layer has a thickness of 0.8-1.2 mm and is a dense tubular structure.

[0008] Preferably, the inner wall of the inner layer has an arc-shaped structure, and the thickness of the inner layer is 0.5-0.8 mm.

[0009] Preferably, the modified treatment layer is disposed on both sides of the fiber woven mesh, and the thickness of the modified treatment layer is 0.05-0.1 mm.

[0010] Preferably, the thickness of the middle layer is 0.3-0.5 mm, and the fiber woven mesh of the middle layer is closely attached to the outer and inner layers.

[0011] Compared with the prior art, the advantages and positive effects of this utility model are as follows: 1. In this utility model, the outer layer adopts a dense tubular structure of 0.8-1.2mm, which effectively improves the fire resistance and flame retardant performance. It can not only block the spread of flames, but also solve the problems of insufficient flame retardant effect or brittle material in the prior art. The 80-120 mesh warp and weft interwoven fiber mesh of the middle layer works together with the modified treatment layer. Through its own elastic buffering effect, it can prevent the outer layer from cracking. The modified treatment layer can also enhance the adhesion between the middle layer and the outer and inner layers. The 0.3-0.5mm thickness design of the middle layer takes into account both mechanical strength and structural lightweight, further improving the impact resistance and tensile strength of the protective sleeve. The 0.5-0.8mm thickness of the inner layer is adapted to the arc-shaped inner wall structure, which not only reduces friction damage to the cable during construction, but also significantly improves the overall flexibility of the protective sleeve, making pipe insertion and bending construction more convenient, and effectively reducing construction difficulty and cost. 2. In this utility model, an integrated composite structure is formed through a co-extrusion dynamic cross-linking process of the outer, middle, and inner layers, with a continuous transition structure at the joints. This not only avoids the risk of interlayer delamination but also improves the long-term stability of the protective sleeve, making it less prone to aging in harsh environments such as high temperature and humidity, thus extending its overall service life. Simultaneously, the integrated structural design and co-extrusion process are compatible with the needs of large-scale industrial production, making it suitable for cable protection in various complex scenarios such as industrial production and construction engineering, thus overcoming the limitations of existing products in terms of functional balance and scenario adaptability. Attached Figure Description

[0012] Figure 1 A three-dimensional structural diagram of a fire-resistant and flame-retardant cable protective sleeve is provided for this utility model; Figure 2 This utility model provides a cross-sectional three-dimensional structural diagram of a fire-resistant and flame-retardant cable protective sleeve. Figure 3 This utility model provides a cross-sectional side view of a fire-resistant and flame-retardant cable protective sleeve.

[0013] Legend: 1. Outer layer; 2. Middle layer; 3. Inner layer; 4. Modified treatment layer. Detailed Implementation

[0014] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0015] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0016] Example 1: As Figures 1-3 As shown, this utility model provides a fire-resistant and flame-retardant cable protection sleeve, including an outer layer 1, a middle layer 2 and an inner layer 3 arranged sequentially from the outside to the inside. The outer layer 1 is a fire-resistant and flame-retardant layer, the middle layer 2 is a flexible reinforcing buffer layer, and the inner layer 3 is a flexible adapting layer. The outer layer 1, the middle layer 2 and the inner layer 3 are formed into an integrated composite structure through a co-extrusion process. The middle layer 2 is a fiber braided mesh structure, and the surface of the fiber braided mesh is provided with a modified treatment layer 4. The fiber woven mesh adopts a warp and weft interlacing weaving method. The mesh count of the fiber woven mesh is 80-120 mesh. The outer layer 1 has a thickness of 0.8-1.2mm and is a dense tubular structure. The inner wall of the inner layer 3 has an arc-shaped structure and a thickness of 0.5-0.8mm. The modified treatment layer 4 is set on both sides of the fiber woven mesh and has a thickness of 0.05-0.1mm. The middle layer 2 has a thickness of 0.3-0.5mm and the fiber woven mesh of the middle layer 2 is tightly bonded to the outer layer 1 and the inner layer 3.

[0017] The specific settings and functions of this embodiment are described below. The outer layer 1 adopts a dense tubular structure with a thickness of 0.8-1.2mm. Its core function is to construct the first fire-retardant barrier. In the event of a fire, the dense structure can prevent flames from directly contacting the inner layer 3 and the cable, delaying the spread of the fire and providing time to ensure the cable maintains its normal transmission function. The middle layer 2 is an 80-120 mesh woven fiber mesh structure, and both sides are provided with a 0.05-0.1mm modified treatment layer 4. The woven method gives the middle layer 2 good elasticity and tensile strength. When bent or dragged during construction, it can absorb external force through its own deformation, preventing the outer layer 1 from cracking due to excessive rigidity. The modified treatment layer 4 can reduce the interfacial tension between the fiber mesh and the outer layer 1 and inner layer 3, ensuring that the three are tightly bonded and preventing interlayer peeling. The inner layer 3 is designed with a 0.5-0.8mm thick arc-shaped inner wall structure. The arc-shaped contour is adapted to the cable surface, which can reduce the frictional resistance during construction and conduit installation. At the same time, the soft adapting layer can improve the overall flexibility, making the protective sleeve easier to bend and adapt to complex construction paths. The outer layer 1 employs a dense tubular structure with a thickness of 0.8-1.2mm, effectively enhancing its fire resistance and flame retardant properties. It not only blocks the spread of flames but also solves the problems of insufficient flame retardancy or excessively brittle materials in existing technologies. The middle layer 2, with its 80-120 mesh interwoven fiber mesh, works in conjunction with the modified treatment layer 4. Its elastic cushioning effect prevents cracking of the outer layer 1. The modified treatment layer 4 also strengthens the adhesion between the middle layer 2, the outer layer 1, and the inner layer 3. Furthermore, the 0.3-0.5mm thickness of the middle layer 2 balances mechanical strength with lightweight construction, further improving the protective sleeve's impact and tensile strength. The 0.5-0.8mm thickness of the inner layer 3 is compatible with the curved inner wall structure, reducing frictional damage to cables during construction and significantly improving the overall flexibility of the protective sleeve. This makes installation through conduits and bending easier, effectively reducing construction difficulty and costs.

[0018] Example 2: Figures 1-3 As shown, the integrated composite structure is formed by co-extrusion dynamic cross-linking process, and the connection between the outer layer 1, the middle layer 2 and the inner layer 3 forms a continuous transition structure.

[0019] The overall effect of this embodiment is that the co-extrusion dynamic cross-linking process forms an integrated composite structure and a continuous transition joint between the outer layer 1, the middle layer 2, and the inner layer 3. This process allows the three layers to partially fuse at the molecular level during molding, preserving the original functional characteristics of each layer while avoiding the interlayer gap problem that is common in traditional multilayer structures. When the protective sleeve is subjected to mechanical impact or bending, the integrated structure can evenly distribute the external force to each layer. The outer layer 1 resists flames with its density, the middle layer 2 buffers the impact with the strength of the fiber woven mesh, and the inner layer 3 adapts to deformation through its flexibility. The three work together to break through the technical bottleneck that makes it difficult for a single material to achieve both flame retardancy and flexibility. The outer layer 1, middle layer 2, and inner layer 3 are formed into an integrated composite structure through a co-extrusion dynamic cross-linking process, with a continuous transition structure at the joints. This not only avoids the risk of interlayer delamination but also improves the long-term stability of the protective sheath, making it less prone to aging in harsh environments such as high temperature and humidity, thus extending its overall service life. Simultaneously, the integrated structural design and co-extrusion process are compatible with the needs of large-scale industrial production, making it suitable for cable protection in various complex scenarios such as industrial production and construction engineering, thus overcoming the limitations of existing products in terms of functional balance and scenario adaptability.

[0020] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A fire-resistant and flame-retardant cable protective sleeve, characterized in that, It includes an outer layer (1), a middle layer (2) and an inner layer (3) arranged sequentially from the outside to the inside. The outer layer (1) is a fire-resistant and flame-retardant layer, the middle layer (2) is a flexible reinforced buffer layer, and the inner layer (3) is a flexible adaptable layer. The outer layer (1), the middle layer (2) and the inner layer (3) are formed into an integrated composite structure through a co-extrusion process. The middle layer (2) is a fiber woven mesh structure, and the surface of the fiber woven mesh is provided with a modified treatment layer (4).

2. The fire-resistant and flame-retardant cable protective sleeve according to claim 1, characterized in that, The fiber woven mesh adopts a warp and weft interlacing weaving method, and the mesh count of the fiber woven mesh is 80-120 mesh.

3. The fire-resistant and flame-retardant cable protective sleeve according to claim 1, characterized in that, The outer layer (1) has a thickness of 0.8-1.2 mm and is a dense tubular structure.

4. The fire-resistant and flame-retardant cable protective sleeve according to claim 1, characterized in that, The inner wall of the inner layer (3) is an arc-shaped structure, and the thickness of the inner layer (3) is 0.5-0.8 mm.

5. The fire-resistant and flame-retardant cable protective sleeve according to claim 1, characterized in that, The modified treatment layer (4) is disposed on both sides of the fiber woven mesh, and the thickness of the modified treatment layer (4) is 0.05-0.1mm.

6. The fire-resistant and flame-retardant cable protective sleeve according to claim 1, characterized in that, The thickness of the middle layer (2) is 0.3-0.5 mm, and the fiber woven mesh of the middle layer (2) is closely attached to the outer layer (1) and the inner layer (3).

Images