Fireproof compression-resistant cable

Abstract

The utility model relates to the field of protective cables, in particular to a fireproof compression-resistant cable, which comprises an outer protective layer, a filling layer arranged in the outer protective layer, a middle conductor wire core wrapped in the filling layer, four side conductor wire cores arranged on the outer ring of the middle conductor wire core, and an auxiliary protective structure. When the cable is subjected to heavy extrusion force when being laid or after being laid, the outer layer protection structure of the cable deforms firstly after the cable is subjected to the heavy extrusion force through the elasticity of the compression-resistant pipe and the middle abutting column rubber and in combination with the protection layer structures on the outer rings of the upper middle conductor wire core and the side conductor wire core; then, the middle abutting column is deformed to a certain extent to reduce the borne pressure, finally, the final pressure is borne through the protection structures of the outer rings of the middle conductor wire core and the side conductor wire core, and through the multi-layer reduction, the middle conductor wire core and the side conductor wire core in the cable can be protected to the maximum extent; therefore, the possibility that the outer ring protection layer is damaged is reduced.

Description

Technical Field

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

[0002] Cables are made of one or more mutually insulated conductors and an outer insulating protective layer. They are wires that transmit electricity or information from one place to another. Since cables are generally laid underground and need to have good fire resistance, most existing cables have a certain degree of fire resistance and pressure resistance.

[0003] However, the distance between the central conductor core and the several conductor cores outside of most existing cables is relatively short. Therefore, even if the cable itself has a certain degree of compression resistance, the cable will still undergo a certain deformation after being subjected to a heavier extrusion force, resulting in the extrusion of the several conductor cores inside the cable. This can easily cause the protective layer of the several conductor cores inside the cable to be damaged, thereby affecting the signal transmission of the cable. Utility Model Content

[0004] The purpose of the utility model is to provide a fireproof and pressure-resistant cable in order to solve the above problems.

[0005] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0006] A fireproof and pressure-resistant cable, comprising an outer protective layer, a filling layer arranged inside the outer protective layer, a middle conductor core and four side conductor cores of the outer ring of the middle conductor core wrapped inside the filling layer, and an auxiliary protection structure;

[0007] The auxiliary protection structure includes four pressure-resistant tubes, each of which is arranged between two adjacent side conductor cores, a plurality of middle support columns are fixed on the inner wall of the pressure-resistant tube, and a plurality of through holes are opened on the outer wall of the pressure-resistant tube.

[0008] Preferably: the pressure-resistant tube and the middle support column are both made of elastic rubber material, and the multiple through holes on the outer wall of the pressure-resistant tube are evenly distributed.

[0009] Preferably, the distance between each pressure-resistant tube and the corresponding two side conductor cores is the same as the distance between the pressure-resistant tube and the center conductor core.

[0010] Preferably, the inner circle of the outer protective layer is fixed with the inner protective layer, the interior of the inner protective layer is a steel wire mesh structure with spirally distributed threads, and the inner protective layer is bendable.

[0011] Preferably, the outer layer of the outer protective layer is made of silicone rubber.

[0012] Preferably: the outer rings of the middle conductor core and the side conductor core are both provided with a core pressure-resistant layer, the internal structure of the core pressure-resistant layer is the same as the internal structure of the inner protective layer, and the outer ring of the core pressure-resistant layer is provided with a core protective sleeve.

[0013] The beneficial effects compared with the prior art are as follows:

[0014] When the cable is subjected to heavy extrusion pressure during or after laying, the outer protective structure of the cable will be deformed first due to the elasticity of the pressure-resistant tube and the middle support column rubber, combined with the protective layer structure of the middle conductor core and the outer ring of the side conductor core. Then the middle support column will deform to a certain extent to reduce the pressure, and finally the final pressure will be borne by the protective structure of the outer ring of the middle conductor core and the side conductor core. Through such multi-layer reduction, the middle conductor core and the side conductor core inside the cable can be protected to the greatest extent, thereby reducing the possibility of damage to the outer ring protective layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] 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 or the description of the prior art 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 labor.

[0016] Figure 1 It is a structural schematic diagram of a fireproof and pressure-resistant cable described in the utility model;

[0017] Figure 2 This is a fire-proof and pressure-resistant cable described in the utility model. Figure 1 A large picture of prescription A;

[0018] Figure 3 It is a schematic diagram of the internal structure of the inner protective layer of a fireproof and pressure-resistant cable described in the utility model;

[0019] Figure 4 The utility model is a schematic structural diagram of a fireproof and pressure-resistant cable pressure-resistant tube.

[0020] The following are the descriptions of the reference numerals:

[0021] 1. Outer protective layer; 11. Inner protective layer; 2. Filling layer; 3. Middle conductor core; 31. Side conductor core; 32. Core pressure-resistant layer; 33. Core protection sleeve; 4. Pressure-resistant tube; 41. Middle support column; 42. Through hole. DETAILED DESCRIPTION

[0022] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0024] The utility model is further described below in conjunction with the accompanying drawings:

[0025] like Figure 1-Figure 4 As shown, a fireproof and pressure-resistant cable includes an outer protective layer 1, a filling layer 2 is arranged inside the outer protective layer 1, a middle conductor core 3 and four side conductor cores 31 of the outer ring of the middle conductor core 3 are wrapped inside the filling layer 2, and an auxiliary protection structure is also included.

[0026] The inner circle of the outer protective layer 1 is fixed with the inner protective layer 11, the interior of the inner protective layer 11 is a steel mesh structure with spiral distribution, and the inner protective layer 11 is bendable, and the outer layer of the outer protective layer 1 is made of silicone rubber. The silicone rubber of the outer layer of the outer protective layer 1 can make the outer circle of the cable have good fire resistance and high temperature resistance, and the steel mesh structure with spiral distribution inside the inner protective layer 11 can make the cable itself have good pressure resistance.

[0027] The outer circles of the middle conductor core 3 and the side conductor core 31 are both provided with a core pressure-resistant layer 32. The internal structure of the core pressure-resistant layer 32 is the same as the internal structure of the inner protective layer 11. The outer circle of the core pressure-resistant layer 32 is provided with a core protective sleeve 33. By providing the core pressure-resistant layer 32 on the outer circles of the middle conductor core 3 and the side conductor core 31, the middle conductor core 3 and the side conductor core 31 inside the cable themselves also have good pressure resistance.

[0028] The auxiliary protection structure includes four pressure-resistant tubes 4, each of which is provided between two adjacent side conductor cores 31, and the spacing between each pressure-resistant tube 4 and the corresponding two side conductor cores 31 is the same as the spacing between the pressure-resistant tube 4 and the middle conductor core 3. A plurality of middle abutment columns 41 are fixed to the inner wall of the pressure-resistant tube 4, and a plurality of through holes 42 are opened on the outer wall of the pressure-resistant tube 4. The pressure-resistant tube 4 and the middle abutment columns 41 are made of elastic rubber, and the plurality of through holes 42 on the outer wall of the pressure-resistant tube 4 are evenly distributed. When the cable is subjected to a heavy extrusion force during or after laying, the pressure-resistant tube 4 and the middle abutment columns 41 are used to prevent the cable from being overheated. Due to the elasticity of the rubber of the middle support column 41, combined with the protective layer structure of the outer ring of the middle conductor core 3 and the side conductor core 31, when the cable is subjected to a heavier extrusion pressure, the outer protective structure of the cable will be deformed first, and then the middle support column 41 will undergo a certain deformation to reduce the pressure, and finally the final pressure will be borne by the protective structure of the outer ring of the middle conductor core 3 and the side conductor core 31. Through such multi-layer reduction, the middle conductor core 3 and the side conductor core 31 inside the cable can be protected to the greatest extent, thereby reducing the possibility of damage to the outer ring protective layer.

[0029] Working principle: When the cable is subjected to a heavy extrusion pressure during or after laying, through the elasticity of the rubber of the pressure-resistant tube 4 and the middle support column 41, combined with the protective layer structure of the outer ring of the middle conductor core 3 and the side conductor core 31, the outer protective structure of the cable will be deformed first after the cable is subjected to a heavy extrusion pressure, and then the middle support column 41 will undergo a certain deformation to reduce the pressure, and finally the final pressure will be borne by the protective structure of the outer ring of the middle conductor core 3 and the side conductor core 31. Through such multi-layer reduction, the middle conductor core 3 and the side conductor core 31 inside the cable can be protected to the greatest extent, thereby reducing the possibility of damage to the outer ring protective layer.

[0030] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A fireproof and pressure-resistant cable, comprising an outer protective layer (1), a filling layer (2) arranged inside the outer protective layer (1), a middle conductor core (3) and four side conductor cores (31) on the outer ring of the middle conductor core (3) wrapped inside the filling layer (2), characterized in that: Also included are supplementary protective structures; The auxiliary protection structure comprises four pressure-resistant tubes (4), wherein a pressure-resistant tube (4) is arranged between each two adjacent side conductor cores (31), a plurality of middle support columns (41) are fixed to the inner wall of the pressure-resistant tube (4), and a plurality of through holes (42) are opened on the outer wall of the pressure-resistant tube (4).

2. A fireproof and pressure-resistant cable according to claim 1, characterized in that: The pressure-resistant tube (4) and the middle support column (41) are both made of elastic rubber material, and the multiple through holes (42) on the outer wall of the pressure-resistant tube (4) are evenly distributed.

3. A fireproof and pressure-resistant cable according to claim 1, characterized in that: The distance between each of the pressure-resistant tubes (4) and the corresponding two side conductor cores (31) is the same as the distance between the pressure-resistant tube (4) and the center conductor core (3).

4. A fireproof and pressure-resistant cable according to claim 1, characterized in that: An inner protective layer (11) is fixed to the inner circle of the outer protective layer (1); the interior of the inner protective layer (11) is a steel wire mesh structure with spirally distributed threads; and the inner protective layer (11) is bendable.

5. The fireproof and pressure-resistant cable according to claim 1, characterized in that: The outer layer of the outer protective layer (1) is made of silicone rubber.

6. A fireproof and pressure-resistant cable according to claim 4, characterized in that: The outer rings of the central conductor core (3) and the side conductor core (31) are both provided with a core pressure-resistant layer (32); the internal structure of the core pressure-resistant layer (32) is the same as the internal structure of the inner protective layer (11); and the outer ring of the core pressure-resistant layer (32) is provided with a core protective sleeve (33).

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