Anti-deformation fireproof cable

Abstract

The utility model discloses an anti-deformation fireproof cable, which comprises a plurality of wire cores, a ceramic silicon rubber neck bush, a filling layer, an armor layer and an outer sheath, the ceramic silicon rubber neck bush comprises a main body and a plurality of supporting surfaces, a connecting surface is arranged on the outer wall of the main body and between any two adjacent wire cores, and the outer wall of the main body is provided with a plurality of insulating layers. And the plurality of supporting surfaces are all cambered surface structures and are coaxially arranged outside the main body in an annular array. The utility model relates to the technical field of cables. The deformation-resistant fireproof cable is provided with the ceramic silicone rubber neck bush, on one hand, the deformation-resistant fireproof cable is formed by adopting a conventional extrusion process, is easy to realize and is low in production difficulty, and on the other hand, the plurality of supporting surfaces are coaxially arranged outside the main body through the connecting surfaces, and an elastic supporting structure is formed outside the plurality of wire cores; according to the cable, external pressure can be absorbed, the cable core can be protected, the overall compression resistance of the cable is effectively improved, and meanwhile, each layer can form tight coating on the structure.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a deformation-resistant fireproof cable. Background Art

[0002] After searching, Chinese patent CN211929107U discloses a high-strength pressure-resistant fireproof cable, including a skeleton, wherein the skeleton includes four rectangular hollow skeletons and four L-shaped hollow skeletons, the outer sides of the four rectangular hollow skeletons are respectively connected by four L-shaped hollow skeletons, a wire core one is arranged between the four rectangular hollow skeletons, and a wire core two is respectively arranged inside the four rectangular hollow skeletons. The outer side of the skeleton is sequentially coated with a fiber cloth sheath, a lead alloy inner sheath, a glass fiber tape plus a ceramic silicone rubber tape sheath and a double steel tape armored polyvinyl chloride outer sheath. The utility model adopts four rectangular hollow skeletons and four L-shaped hollow skeletons, which ensures the heat dissipation effect of the cable while ensuring the strength of the cable. The structure is stable, has the characteristics of high temperature resistance and fire prevention, and has good pressure resistance.

[0003] In the process of implementing the present invention, the inventors found that there are at least the following problems in the prior art:

[0004] As mentioned above, Chinese patent CN211929107U provides external support for the wire core by setting four rectangular hollow skeletons and four L-shaped hollow skeletons to ensure the strength and compression resistance of the cable. In practical applications, on the one hand, the various hierarchical structures of the cable are mostly produced by continuous extrusion or wrapping, and the setting of the skeleton will undoubtedly increase the difficulty of production. On the other hand, the wire core arranged in the skeleton cavity and the fiber cloth coating coated on the outside of the skeleton have the problem of loose fitting, and collapse is prone to occur during use.

[0005] Therefore, the above technical problems need to be solved. Utility Model Content

[0006] In order to overcome the deficiencies of the prior art, the utility model proposes a deformation-resistant fireproof cable, which solves the problem that the current fireproof cables, such as Chinese patent CN211929107U, are difficult to produce in actual applications, and the layers adjacent to the skeleton are not tightly fitted, which easily leads to collapse.

[0007] In order to solve the above technical problems, the basic technical solution proposed by the utility model is:

[0008] A deformation-resistant fireproof cable comprises a plurality of wire cores distributed in a ring array and a ceramic silicone rubber inner sleeve extruded and coated on the outside of the plurality of wire cores, and a filling layer, an armor layer and an outer sheath coaxially coated on the outside of the ceramic silicone rubber inner sleeve in sequence.

[0009] The ceramic silicone rubber inner bushing includes a main body with a cylindrical outer wall structure and a plurality of support surfaces matched with the number of wire cores. A connecting surface for integrally forming the support surface and the main body is provided on the outer wall of the main body and between any two adjacent wire cores. The plurality of connecting surfaces are distributed along the radial direction of the main body, and the plurality of support surfaces are all arc structures and are coaxially arranged in a circular array outside the main body.

[0010] Preferably, the filling layer is formed by curing magnesium oxide extruded and coated on the outside of the ceramic silicone rubber inner liner, and the outer wall of the filling layer is a cylindrical structure. Magnesium oxide is a material with a high ignition point and good flame retardant properties. At the same time, it also has certain elasticity and compression resistance, and can play an effective filling and supporting role inside the cable. Magnesium oxide is often used as a filling material, which not only improves the fire resistance of the cable, but also enhances the overall structural strength of the cable.

[0011] Preferably, the armor layer is composed of a double-layer galvanized steel strip that is gap-wrapped around the outside of the filling layer. The design of the double-layer galvanized steel strip can more effectively resist the tension generated by the cable during the stretching process, protecting the wire core and structure inside the cable from damage. At the same time, the gap wrapping process forms a certain gap between the steel strips. This structure can better disperse the pressure from the outside, such as the weight of soil, stones, etc., thereby extending the service life of the cable. In addition, as a high magnetic permeability material, the steel strip has a good magnetic shielding effect. The design of the double-layer steel strip can further enhance this shielding effect, effectively resist external electromagnetic interference, and protect the stable transmission of the signal inside the cable.

[0012] Preferably, the outer sheath is formed by curing a flame retardant polymer extruded and coated on the outside of the armor layer, and the outer wall of the outer sheath is a cylindrical structure. Among them, using a flame retardant polymer as the outer sheath of the cable, such as flame retardant PVC, flame retardant PE, etc., can improve the flexibility of the cable and has a relatively low cost. These polymer materials improve their stability and non-flammability at high temperatures by adding flame retardants and the like.

[0013] Preferably, it also includes an inner sheath arranged between the filling layer and the armor layer, and the inner sheath is composed of refractory ceramic fibers woven and coated on the outside of the filling layer. Among them, refractory ceramic fiber materials are widely used in various occasions requiring high temperature protection and fireproof and heat insulation due to their excellent fire resistance, high elastic modulus and high compressive strength, as well as good thermal insulation effect and chemical stability. The inner sheath woven with refractory ceramic fibers and coated on the outside of the filling layer is an optional layer. On the one hand, it can protect the filling layer from damage by the armor layer and provide external protection for the filling layer and the ceramic silicone rubber inner liner. On the other hand, it can provide further fire protection and heat insulation effect.

[0014] Preferably, the wire core is composed of a copper core conductor, a mica tape wrapped around the outside of the copper core conductor, and an insulation layer extruded and coated on the outside of the mica tape. The mica tape has high heat resistance and electrical properties and can maintain the integrity of the copper core conductor in a high temperature environment. The main function of the insulation layer is to protect the conductor and prevent current leakage and short circuit.

[0015] The beneficial effects of the utility model are:

[0016] The technical solution of the utility model is to provide a ceramic silicone rubber inner bushing. On the one hand, it is formed by a conventional extrusion process, which is easy to implement and has low production difficulty. On the other hand, through the connecting surface, a plurality of supporting surfaces are coaxially arranged on the outside of the main body to form an elastic supporting structure outside a plurality of wire cores, which can absorb external pressure and protect the wire cores, effectively improving the overall compression resistance of the cable. At the same time, each layer can form a tight coating on the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the ceramic silicone rubber inner bushing of the utility model;

[0019] Figure 3 It is a structural schematic diagram of the wire core of the utility model;

[0020] Description of reference numerals:

[0021] 100, wire core;

[0022] 110, copper core conductor; 120, mica tape; 130, insulation layer;

[0023] 200, ceramic silicone rubber liner;

[0024] 210, main body; 220, supporting surface; 230, connecting surface;

[0025] 300, filling layer;

[0026] 400, armor layer;

[0027] 500, outer sheath;

[0028] 600, Inner sheath. DETAILED DESCRIPTION

[0029] 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.

[0030] See also Figure 1-3 The utility model provides a technical solution: a deformation-resistant fireproof cable, comprising a plurality of wire cores 100 distributed in an annular array and a ceramic silicone rubber inner bushing 200 extruded and coated on the outside of the plurality of wire cores 100, and a filling layer 300, an armor layer 400 and an outer sheath 500 coaxially coated on the outside of the ceramic silicone rubber inner bushing 200 in sequence, the ceramic silicone rubber inner bushing 200 comprises a main body 210 with a cylindrical outer wall structure and a plurality of supporting surfaces 220 matched with the number of wire cores 100, a connecting surface 230 for integrally forming the supporting surface 220 with the main body 210 is provided on the outer wall of the main body 210 and between any two adjacent wire cores 100, the plurality of connecting surfaces 230 are distributed along the radial direction of the main body 210, and the plurality of supporting surfaces 220 are all arc structures and are coaxially arranged on the outside of the main body 210 in an annular array.

[0031] Based on the above-mentioned structural setting, the deformation-resistant fireproof cable is composed of a plurality of cores 100 and a ceramic silicone rubber inner sleeve 200, a filling layer 300, an armor layer 400 and an outer sheath 500 sequentially coated on the outside thereof, wherein the ceramic silicone rubber inner sleeve 200 provides elastic protection for the outside of the plurality of cores 100 and realizes the layout positioning between the cores 100, the filling layer 300 extruded and coated on the outside of the ceramic silicone rubber inner sleeve 200 plays a filling and supporting role inside the cable, the armor layer 400 can improve the mechanical strength and resistance to external force damage of the cable, and the outer sheath 500 can protect the cable from erosion by external environmental factors. Specifically, during use, the ceramic silicone rubber inner sleeve 200 has good elasticity and deformation ability at room temperature, and cooperates with the support surface 220 integrally connected to the outside of the main body 210 by the connecting surface 230 to form an elastic support structure on the outside of the core 100. When the cable is squeezed, it can It can effectively absorb external pressure, thereby protecting the wire core 100. At the same time, ceramic silicone rubber has excellent fireproof and flame retardant properties. At high temperatures, ceramic powder will react with silicone rubber to quickly form a hard ceramic shell that does not melt or drip, prevents the spread of flames, and reduces smoke generation. In addition, the processing technology of the ceramic silicone rubber inner sleeve 200 is relatively simple, and it can be produced using conventional rubber processing equipment such as extruders, flat vulcanizers, injection machines, etc. The anti-deformation fireproof cable is provided with a ceramic silicone rubber inner sleeve 200. On the one hand, it is formed by a conventional extrusion process, which is easy to implement and has low production difficulty. On the other hand, through the connecting surface 230, a plurality of supporting surfaces 220 are coaxially arranged on the outside of the main body 210, and an elastic supporting structure is formed on the outside of the plurality of wire cores 100, which can absorb external pressure and protect the wire core 100, effectively improving the overall compression resistance of the cable. At the same time, each level can form a tight coating on the structure.

[0032] Furthermore, the filling layer 300 is formed by curing the magnesium oxide extruded and coated on the outside of the ceramic silicone rubber inner bushing 200, and the outer wall of the filling layer 300 is a cylindrical structure.

[0033] Furthermore, the armor layer 400 is composed of a double layer of galvanized steel strips which are intermittently wrapped around the outside of the filling layer 300 .

[0034] Furthermore, the outer sheath 500 is formed by curing a flame-retardant polymer that is extruded and coated on the outside of the armor layer 400 , and the outer wall of the outer sheath 500 is a cylindrical structure.

[0035] Furthermore, it also includes an inner sheath 600 disposed between the filling layer 300 and the armor layer 400 , and the inner sheath 600 is composed of refractory ceramic fibers woven and coated on the outside of the filling layer 300 .

[0036] Further, the wire core 100 is composed of a copper core conductor 110, a mica tape 120 wound around and coated on the outside of the copper core conductor 110, and an insulating layer 130 extruded and coated on the outside of the mica tape 120.

[0037] According to the disclosure and teachings of the above specification, those skilled in the art to which the present utility model pertains can also make changes and modifications to the above embodiments. Therefore, the present utility model is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present utility model should also fall within the protection scope of the claims of the present utility model. In addition, although some specific terms are used in this specification, these terms are only for convenience of description and do not constitute any limitation to the present utility model.

Claims

1. A deformation-resistant fireproof cable, comprising a plurality of wire cores (100) distributed in a ring array, a ceramic silicone rubber inner sleeve (200) extruded and coated on the outside of the plurality of wire cores (100), and a filling layer (300), an armor layer (400) and an outer sheath (500) coaxially coated on the outside of the ceramic silicone rubber inner sleeve (200) in sequence; Features: The ceramic silicone rubber inner bushing (200) comprises a main body (210) having an outer wall in a cylindrical structure and a plurality of support surfaces (220) matching the number of wire cores (100); a connection surface (230) for integrally forming the support surface (220) and the main body (210) is provided on the outer wall of the main body (210) and between any two adjacent wire cores (100); the plurality of connection surfaces (230) are distributed along the radial direction of the main body (210); and the plurality of support surfaces (220) are all in an arc structure and are coaxially arranged in a ring array outside the main body (210).

2. A deformation-resistant fireproof cable according to claim 1, characterized in that: The filling layer (300) is formed by curing magnesium oxide that is extruded and coated on the outside of the ceramic silicone rubber inner liner (200), and the outer wall of the filling layer (300) is in a cylindrical structure.

3. The anti-deformation fireproof cable according to claim 1, characterized in that: The armor layer (400) is composed of a double layer of galvanized steel strips which are intermittently wrapped around the outside of the filling layer (300).

4. The anti-deformation fireproof cable according to claim 1, characterized in that: The outer sheath (500) is formed by curing a flame-retardant polymer that is extruded and coated on the outside of the armor layer (400), and the outer wall of the outer sheath (500) is a cylindrical structure.

5. The anti-deformation fireproof cable according to claim 1, characterized in that: It also includes an inner sheath (600) disposed between the filling layer (300) and the armor layer (400), wherein the inner sheath (600) is composed of refractory ceramic fibers braided and coated on the outside of the filling layer (300).

6. The anti-deformation fireproof cable according to claim 1, characterized in that: The wire core (100) is composed of a copper core conductor (110), a mica tape (120) wound and coated on the outside of the copper core conductor (110), and an insulating layer (130) extruded and coated on the outside of the mica tape (120).

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