Ceramic silicone rubber fireproof wire cable

Abstract

The utility model discloses a ceramic silicone rubber fire-resistant wire cable, which relates to the technical field of fire-resistant cables and comprises an outer sheath, a ceramic silicone rubber insulating layer is arranged in the outer sheath, a reinforced protective layer is arranged in the ceramic silicone rubber insulating layer, and an inner sheath is fixedly connected between the ceramic silicone rubber insulating layer and a cable core assembly. The thermoplastic sheath is located in the inner sheath, and the interior of the thermoplastic sheath is fixedly connected with a reinforcing shielding layer which is of a net-shaped structure woven by copper wires, so that a three-in-one protection form is formed between the ceramic silicone rubber insulating layer and the cable core assembly. The beneficial effects are that the ceramic silicone rubber insulating layer forms a compact and hard ceramic body in an open fire or high temperature environment, but has the elastic characteristic of silica gel at normal temperature, and the ceramic silicone rubber at normal temperature has low strength and is easy to stretch and tear, so that the inner sheath is not easy to deform. And the thermoplastic sheath and the reinforced shielding layer form a three-in-one reinforced protection layer, so that the tensile capacity of the cable is improved.

Description

Technical Field

[0001] This utility model relates to the field of fire-resistant cable technology, and in particular to a ceramic silicone rubber fire-resistant wire and cable. Background Technology

[0002] Ceramic silicone rubber has excellent fire resistance, flame retardancy, low smoke, and non-toxic properties. It has a simple molding process, and its residue after combustion is a hard ceramic shell. The hard shell does not melt or drip in a fire environment, making it suitable for any place that requires fire protection.

[0003] A search revealed a Chinese patent publication number, CN218957435U, which discloses a ceramicized silicone rubber insulated fireproof cable. This patent uses ceramicized silicone rubber bonded and fixed inside a steel pipe to provide excellent fireproof performance under open flame or high temperature conditions. However, this device has certain problems: the ceramicized silicone rubber has low strength at room temperature and is easily stretched and torn; and it is prone to breakage if it is bumped or dragged during construction when it is fixed inside a heavy steel pipe. Utility Model Content

[0004] The purpose of this invention is to provide a ceramic silicone rubber fire-resistant wire and cable to solve the above-mentioned problems.

[0005] This utility model achieves the above objectives through the following technical solutions:

[0006] A ceramic silicone rubber fire-resistant wire and cable includes an outer sheath, on which multiple reinforcing blocks are fixedly connected. The reinforcing blocks are trapezoidal strips and are evenly distributed along the circumference of the outer sheath.

[0007] The outer sheath has a ceramicized silicone rubber insulation layer inside, and a reinforced protective layer inside the ceramicized silicone rubber insulation layer. The reinforced protective layer has multiple sets of cable core assemblies inside, including an inner sheath, a thermoplastic sheath, and a reinforced shielding layer.

[0008] The inner sheath is fixedly connected between the ceramicized silicone rubber insulation layer and the cable core assembly. The inner sheath is made of tin-plated copper wire and aramid fiber. The thermoplastic sheath is located inside the inner sheath. The thermoplastic sheath is an elastic material with excellent heat resistance. A reinforced shielding layer with a mesh structure made of copper wire is fixedly connected inside the thermoplastic sheath, thus forming a three-in-one protection between the ceramicized silicone rubber insulation layer and the cable core assembly.

[0009] Preferably, the reinforced protective layer has a non-metallic reinforcing core inside, which is located at the center of the reinforced shielding layer, and multiple sets of cable core assemblies are evenly distributed around the non-metallic reinforcing core.

[0010] Preferably, the cable core assembly includes a conductor core, which is made of several copper wires of the same diameter and is wrapped with a layer of non-woven fabric.

[0011] Preferably, the conductor core is provided with a fiber reinforcement layer, which is woven from aramid fibers, and a fire-resistant component is provided on the outside of the fiber reinforcement layer.

[0012] Preferably, the fire-resistant component includes mica insulating tape, which is wound in multiple layers around the outside of the fiber reinforcement layer.

[0013] Preferably, a silicone block is provided between each adjacent group of cable core assemblies, and multiple silicone blocks are evenly distributed along the circumference of the non-metallic reinforcing core.

[0014] Preferably, the reinforced shielding layer contains a filling powder, which is located in the gap between the silicone block and the cable core assembly. The filling powder is magnesium oxide powder.

[0015] The beneficial effects are as follows: the ceramicized silicone rubber insulation layer forms a dense and hard ceramic body under open flame or high temperature environment, but has the elastic characteristics of silicone at room temperature. The ceramicized silicone rubber at room temperature has low strength and is easy to stretch and tear, thus forming a three-in-one reinforced protective layer of inner sheath, thermoplastic sheath and reinforced shielding layer to improve the tensile strength of the cable.

[0016] The additional technical features and advantages of this utility model will become more apparent from the following description, or may be learned through specific practice of this utility model. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the following detailed description to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0018] Figure 1 This is a schematic diagram of the structure of the ceramic silicone rubber fire-resistant wire and cable described in this utility model;

[0019] Figure 2 yes Figure 1 Enlarged view of point A;

[0020] Figure 3 This is a front view of the ceramic silicone rubber fire-resistant wire and cable described in this utility model;

[0021] Figure 4 yes Figure 3 Cross-sectional view of BB section.

[0022] The following are explanations of the reference numerals in the attached diagram: 101, outer sheath; 102, reinforcing block; 2, ceramicized silicone rubber insulation layer; 3, inner sheath; 4, thermoplastic sheath; 5, reinforced shielding layer; 6, non-metallic reinforcing core; 7, conductive core; 8, fiber reinforcing layer; 9, mica insulating tape; 10, silicone block. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] The present invention will be further described below with reference to the accompanying drawings:

[0026] like Figures 1-4 As shown, a ceramic silicone rubber fire-resistant wire and cable includes an outer sheath 101, on which a plurality of reinforcing blocks 102 are fixedly connected. The reinforcing blocks 102 are trapezoidal strips and are evenly distributed around the outer sheath 101.

[0027] The outer sheath 101 has a ceramicized silicone rubber insulation layer 2 inside, and a reinforced protective layer inside the ceramicized silicone rubber insulation layer 2. The reinforced protective layer has multiple sets of cable core assemblies inside, including an inner sheath 3, a thermoplastic sheath 4, and a reinforced shielding layer 5.

[0028] The inner sheath 3 is fixedly connected between the ceramicized silicone rubber insulation layer 2 and the cable core assembly. The inner sheath 3 is made of tin-plated copper wire and aramid fiber. The thermoplastic sheath 4 is located inside the inner sheath 3. The thermoplastic sheath 4 is an elastic material with excellent heat resistance. A reinforced shielding layer 5 with a mesh structure made of copper wire is fixedly connected inside the thermoplastic sheath 4, thus forming a three-in-one protection between the ceramicized silicone rubber insulation layer 2 and the cable core assembly. The ceramicized silicone rubber insulation layer 2 forms a dense and hard ceramic body in open flame or high temperature environment, but has the elastic characteristics of silicone at room temperature. The ceramic silicone rubber at room temperature has low strength and is easy to stretch and tear. Thus, the inner sheath 3, thermoplastic sheath 4 and reinforced shielding layer 5 form a three-in-one reinforced protection layer to improve the tensile strength of the cable.

[0029] The reinforced protective layer has a non-metallic reinforcing core 6 inside, which is located at the center of the reinforced shielding layer 5. Multiple sets of cable core assemblies are evenly distributed around the non-metallic reinforcing core 6.

[0030] The cable core assembly includes a conductor 7, which is made of several copper wires of the same diameter and is wrapped with a layer of non-woven fabric.

[0031] The conductor core 7 is provided with a fiber reinforcement layer 8, which is woven from aramid fibers, and a fire-resistant component is provided on the outside of the fiber reinforcement layer 8.

[0032] The fire-resistant component includes mica insulating tape 9, which is wrapped in multiple layers around the outside of fiber reinforcing layer 8. The mica insulating tape 9 can withstand high temperatures and is not easily damaged.

[0033] Silicone blocks 10 are provided between each adjacent group of cable core assemblies, and multiple silicone blocks 10 are evenly distributed around the non-metallic reinforcing core 6.

[0034] The reinforced shielding layer 5 contains a filling powder, which is located in the gap between the silicone block 10 and the cable core assembly. The filling powder is magnesium oxide powder.

[0035] Working principle: Several copper wires of the same diameter are bent into conductor cores 7. Then, a layer of non-woven fabric is wrapped around the conductor cores 7. A fiber reinforcement layer 8, woven from aramid fibers, is then wrapped around the conductor cores 7 to enhance the tensile strength of the cable core assembly. Subsequently, multiple layers of mica insulation tape 9 are wrapped around the fiber reinforcement layer 8. The mica insulation tape 9 can withstand high temperatures without being easily damaged and has good flexibility. Then, a non-metallic reinforcing core 6 is added to the center of multiple cable core assemblies. A silicone block 10 is placed between each adjacent cable core assembly and then wrapped with another layer of non-woven fabric. A reinforcing shielding layer 5, made of copper wire woven mesh structure, is wrapped around the non-woven fabric. Then, magnesium oxide powder is filled into the gaps between the silicone block 10 and the cable core assembly. Finally, a layer of... A thermoplastic sheath 4 with excellent heat resistance is followed by an inner sheath 3 made of tin-plated copper wire and aramid fiber, which is used to improve the cable's tensile strength and anti-interference ability. The inner sheath 3 is wrapped with a ceramicized silicone rubber insulation layer 2. The ceramicized silicone rubber insulation layer 2 forms a dense and hard ceramic body in open flame or high temperature environment, but has the elastic characteristics of silicone at room temperature. The ceramicized silicone rubber has low strength at room temperature and is easy to stretch and tear. Thus, the inner sheath 3, thermoplastic sheath 4 and reinforced shielding layer 5 form a three-in-one reinforced protective layer to improve the cable's tensile strength. The ceramicized silicone rubber insulation layer 2 is wrapped with an outer sheath 101. The reinforcing blocks 102 on the outer sheath 101 enhance the cable's wear resistance.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A ceramic silicone rubber fire-resistant wire and cable, comprising an outer sheath (101), wherein a plurality of reinforcing blocks (102) are fixedly connected to the outer sheath (101), the reinforcing blocks (102) are trapezoidal strips, and the plurality of reinforcing blocks (102) are evenly distributed along the circumference of the outer sheath (101); Its features are: The outer sheath (101) is provided with a ceramicized silicone rubber insulation layer (2) inside, and a reinforced protective layer is provided inside the ceramicized silicone rubber insulation layer (2). The reinforced protective layer is provided with multiple sets of cable core assemblies inside, and the reinforced protective layer includes an inner sheath (3), a thermoplastic sheath (4), and a reinforced shielding layer (5). The inner sheath (3) is fixedly connected between the ceramicized silicone rubber insulation layer (2) and the cable core assembly. The inner sheath (3) is woven from tin-plated copper wire and aramid fiber. The thermoplastic sheath (4) is located inside the inner sheath (3). The thermoplastic sheath (4) is an elastic material with excellent heat resistance. A reinforced shielding layer (5) with a mesh structure woven from copper wire is fixedly connected inside the thermoplastic sheath (4), thereby forming a three-in-one protection between the ceramicized silicone rubber insulation layer (2) and the cable core assembly.

2. The ceramic silicone rubber fire-resistant wire and cable according to claim 1, characterized in that: The reinforced protective layer is provided with a non-metallic reinforcing core (6), which is located at the center of the reinforced shielding layer (5). Multiple sets of cable core assemblies are evenly distributed around the non-metallic reinforcing core (6).

3. The ceramic silicone rubber fire-resistant wire and cable according to claim 1, characterized in that: The cable core assembly includes a conductor (7), which is made of several copper wires of the same diameter and is wrapped with a layer of non-woven fabric.

4. The ceramic silicone rubber fire-resistant wire and cable according to claim 3, characterized in that: The conductor core (7) is provided with a fiber reinforcement layer (8) on the outside. The fiber reinforcement layer (8) is woven from aramid fibers and is provided with a fire-resistant component on the outside of the fiber reinforcement layer (8).

5. The ceramic silicone rubber fire-resistant wire and cable according to claim 4, characterized in that: The fire-resistant component includes a mica insulating tape (9), which is wrapped in multiple layers around the outside of the fiber reinforcing layer (8).

6. The ceramic silicone rubber fire-resistant wire and cable according to claim 2, characterized in that: A silicone block (10) is provided between each adjacent group of the cable core assemblies, and a plurality of silicone blocks (10) are evenly distributed circumferentially along the non-metallic reinforcing core (6).

7. The ceramic silicone rubber fire-resistant wire and cable according to claim 6, characterized in that: The reinforced shielding layer (5) is provided with filling powder, which is located in the gap between the silicone block (10) and the cable core assembly. The filling powder is magnesium oxide powder.

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