Composite explosion-proof control cable

Abstract

The utility model relates to the technical field of explosion-proof control cables, and discloses a composite explosion-proof control cable, which comprises six conductors and a high-flame-retardant filling rope, the outer walls of the six conductors are all provided with insulating layers, the high-flame-retardant filling rope is internally provided with three first protective layers, and the outer walls of the three first protective layers are respectively provided with a second protective layer. Tin-plated drainage wires are arranged on the top sides of the three first protection layers and the right side of the interior of the high-flame-retardant filling rope, the outer wall of the high-flame-retardant filling rope is connected with a steel belt through a second protection layer, and each first protection layer comprises two first aluminum-plastic composite belts located in the high-flame-retardant filling rope. According to the utility model, the copper material with the resistivity of less than or equal to 0.016900 omega.m is adopted as the conductor raw material, seven structures are twisted according to the second-class ultra-soft annealed copper wires, the flexibility and the high conductivity of the finished cable are ensured, and the galvanized copper wire with the thickness of more than 0.8 mm is placed in the middle of the aluminum-plastic composite belt to serve as the drainage wire, so that the stability of charge flow of the shielding layer of the cable is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of explosion-proof control cables, in particular to a composite explosion-proof control cable. Background Art

[0002] With the rapid development of microelectronics technology and information technology in the world, the technology and content of related industry products are also constantly improving. Industrial process automation products in the petroleum, chemical, metallurgical, coal and other industries are mainly used to achieve process control in explosive environments and industrial production with extremely high reliability requirements. In addition to the characteristics of cables used in general industrial process automation, the cables used must also pass strict grade tests such as explosion-proof, anti-static and anti-electromagnetic interference suitable for harsh environments, that is, they are required to have low capacitance, low inductance and extremely high reliability.

[0003] Therefore, intrinsically safe cables used in industries such as petroleum, chemical, metallurgy, coal, etc. with harsh production environments will become another growth point for the development of cable industry products as integrated, networked, and intelligent devices with reliability requirements for industrial process automation products develop. In this regard, in response to this technical problem, this application proposes a composite explosion-proof control cable. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a composite explosion-proof control cable. The utility model adopts copper material with a resistivity of ≤0.016900Ω.m as the conductor raw material, and twists seven structures according to the second type of special soft annealed copper wire to ensure the softness and high conductivity of the finished cable. At the same time, a galvanized copper wire with a diameter of more than 0.8mm is placed in the middle of the aluminum-plastic composite tape as a drainage wire to ensure the stability of the charge flow in the cable shielding layer.

[0005] To achieve the above-mentioned objectives, the utility model provides the following technical solutions: a composite explosion-proof control cable, comprising six conductors and a highly flame-retardant filling rope, the outer walls of the six conductors being provided with an insulating layer, the interior of the highly flame-retardant filling rope being provided with three protective layers one, the top sides of the three protective layers one and the right side of the interior of the highly flame-retardant filling rope being provided with tinned drainage wires, and the outer wall of the highly flame-retardant filling rope being connected to a steel belt via a protective layer two.

[0006] Furthermore, the protective layer 1 includes two aluminum-plastic composite tapes 1 located inside the highly flame-retardant filling rope, wherein one of the aluminum-plastic composite tapes 1 is arranged on the outer walls of two of the insulating layers, and the other aluminum-plastic composite tape 1 is arranged on the outer wall of one of the aluminum-plastic composite tapes 1.

[0007] Furthermore, the second protective layer includes an aluminum-plastic composite belt located on the outer wall of the highly flame-retardant filling rope and an inner lining layer located on the inner wall of the steel belt, and the inner lining layer is arranged on the outer wall of the aluminum-plastic composite belt.

[0008] Furthermore, the conductor is made of copper material with a resistivity of ≤0.016900Ω.m and is twisted into seven strands according to the second type of extra-soft annealed copper wires.

[0009] Furthermore, the tinned drain wire is made of galvanized copper wire with a diameter of more than 0.8 mm as raw material.

[0010] Furthermore, the insulating layer is made of silane cross-linked polyethylene insulating material as raw material.

[0011] Furthermore, the outer wall of the steel belt is provided with an outer protection.

[0012] The utility model has the following beneficial effects:

[0013] 1. In the utility model, copper with resistivity ≤ 0.016900Ω.m is used as the conductor raw material, and seven strands of Class II special soft annealed copper wire are twisted to ensure the softness and high conductivity of the finished cable. At the same time, a specific thermoplastic low-smoke halogen-free flame-retardant intrinsically safe cable sheath material is used as the sheath layer. The outer sheath is evenly extruded, has a smooth surface and uniform color, and can meet the cable requirements of the power system.

[0014] 2. In the utility model, the aluminum-plastic composite tape is used as a composite sub-shielding layer, and a galvanized copper wire with a diameter of more than 0.8 mm is placed in the middle as a drainage wire. After cabling, a high-strength low-smoke halogen-free flame-retardant tape plus an aluminum-plastic composite tape is used as the overall shielding layer to ensure the stability of the charge flow in the cable shielding layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model is a schematic diagram of the cross-sectional structure of a composite explosion-proof control cable.

[0016] Legend:

[0017] 1. Conductor; 2. Insulation layer; 3. Tinned drain wire; 4. Aluminum-plastic composite tape 1; 5. High flame retardant filling rope; 6. Aluminum-plastic composite tape 2; 7. Inner lining layer; 8. Steel tape; 9. Outer protection. DETAILED DESCRIPTION

[0018] 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.

[0019] Reference Figure 1The utility model provides an embodiment: a composite explosion-proof control cable, comprising six conductors 1 and a high flame retardant filling rope 5, the outer walls of the six conductors 1 are all provided with an insulating layer 2, three aluminum-plastic composite tapes 4 are arranged inside the high flame retardant filling rope 5, the top sides of the three aluminum-plastic composite tapes 4 and the right side inside the high flame retardant filling rope 5 are all provided with tinned drainage wires 3, the outer wall of the high flame retardant filling rope 5 is connected to the steel belt 8 through the aluminum-plastic composite tape 2 6, and the outer wall of the steel belt 8 is provided with an outer protection 9;

[0020] Specifically, a specific high-strength copper conductor 1 is used and seven second-class extra-soft annealed copper wires are twisted into a structure to ensure the softness and high conductivity of the finished cable. The insulating layer 2 ensures good insulation performance, high temperature resistance, wear resistance, small size and light weight, which can effectively reduce the load of the cable. The aluminum-plastic composite tape 1 4 and the aluminum-plastic composite tape 2 6 are used as composite sub-shielding layers, and a galvanized copper wire with a diameter of more than 0.8 mm is placed in the middle as a drainage wire. After cabling, a high-strength low-smoke halogen-free flame retardant tape plus an aluminum-plastic composite tape is used as the overall shielding layer to ensure the stability of the charge flow in the cable shielding layer, which can meet the cable requirements of the power system.

[0021] Two aluminum-plastic composite strips 4 are located inside the highly flame-retardant filling rope 5, one of which is arranged on the outer wall of two insulating layers 2, and the other is arranged on the outer wall of one of the aluminum-plastic composite strips 4, an aluminum-plastic composite strip 2 6 is located on the outer wall of the highly flame-retardant filling rope 5, and an inner lining layer 7 is located on the inner wall of the steel strip 8, and the inner lining layer 7 is arranged on the outer wall of the aluminum-plastic composite strip 2 6, the conductor 1 is made of copper material with a resistivity of ≤0.016900Ω.m as a raw material and is twisted into seven strands according to the second type of special soft annealed copper wire, the tinned drain wire 3 is made of galvanized copper wire with a diameter of more than 0.8mm as a raw material, and the insulating layer 2 is made of silane cross-linked polyethylene insulating material as a raw material;

[0022] Specifically, copper with a resistivity of ≤0.016900Ω.m is used as the raw material of conductor 1, and seven strands of second-class extra-soft annealed copper wire are twisted to ensure the softness and high conductivity of the finished cable. At the same time, silane cross-linked polyethylene insulation material is used as the insulation layer 2. The material is added with high-quality and efficient chemicals to ensure good insulation performance, high temperature resistance, wear resistance, small size and light weight, which can effectively reduce the load of the cable. At the same time, a two-layer aluminum-plastic composite tape is used as the composite shielding layer, and a 0.8mm or larger galvanized copper tape is placed in the middle. The wire is used as the drainage line. After the cabling is completed, high-strength low-smoke halogen-free flame retardant tape plus aluminum-plastic composite tape is used as the total shielding layer to ensure the stability of the charge flow in the cable shielding layer. At the same time, high-strength galvanized steel tape 8 is used for gap armoring. The purpose is to enhance the tensile strength, compressive strength and other mechanical protection service life, and the cable anti-interference performance can be improved through shielding protection. At the same time, specific thermoplastic low-smoke halogen-free flame retardant intrinsically safe cable sheath material is used as the sheath layer. The outer sheath 9 is evenly extruded, the surface is flat, the color is uniform, and it can meet the power system's cable requirements.

[0023] Working principle: Use specific high-strength copper conductor 1, copper material with resistivity ≤ 0.016900Ω.m as the raw material of conductor 1, and make seven strands of structure twisted according to the second-class special soft annealed copper wire to ensure the softness and high conductivity of the finished cable; use silane cross-linked polyethylene insulation material as the insulation layer 2, the material is added with high-quality and efficient chemical agents to ensure good insulation performance, high temperature resistance, wear resistance, small size and light weight, which can effectively reduce the load of the cable; after the insulated wire core adopts a twisted structure, it is wrapped with two layers of aluminum-plastic composite tape as a composite shielding layer, and a 0.8mm or larger galvanized copper wire is placed in the middle as the lead Streamline, after cabling, high-strength low-smoke halogen-free flame retardant tape plus aluminum-plastic composite tape is used as the overall shielding layer to ensure the stability of charge flow in the cable shielding layer; the inner lining layer 7 adopts extruded low-smoke halogen-free flame retardant sheath material to ensure the high flame retardant requirements of the cable; high-strength galvanized steel tape 8 is used around the inner lining layer 7 for gap armoring, in order to enhance the tensile strength, compressive strength and other mechanical protection service life, and can also improve the cable anti-interference performance through shielding protection; the outer sheath 9 set adopts specific thermoplastic low-smoke halogen-free flame retardant intrinsically safe cable sheath material, the outer sheath 9 set is evenly extruded, the surface is smooth, the color is uniform, and can meet the cable requirements of the power system.

[0024] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A composite explosion-proof control cable, comprising six conductors (1) and a highly flame-retardant filling rope (5), characterized in that: The outer walls of the six conductors (1) are all provided with an insulating layer (2), the interior of the highly flame-retardant filling rope (5) is provided with three protective layers one, the top sides of the three protective layers one and the right side of the interior of the highly flame-retardant filling rope (5) are all provided with tinned drain wires (3), and the outer wall of the highly flame-retardant filling rope (5) is connected to the steel strip (8) via the protective layer two.

2. A composite explosion-proof control cable according to claim 1, characterized in that: The protective layer 1 comprises two aluminum-plastic composite strips 1 (4) located inside the highly flame-retardant filling rope (5), wherein one of the aluminum-plastic composite strips 1 (4) is arranged on the outer wall of two of the insulating layers (2), and the other aluminum-plastic composite strip 1 (4) is arranged on the outer wall of one of the aluminum-plastic composite strips 1 (4).

3. The composite explosion-proof control cable according to claim 1, characterized in that: The second protective layer comprises a second aluminum-plastic composite belt (6) located on the outer wall of the highly flame-retardant filling rope (5) and an inner lining layer (7) located on the inner wall of the steel belt (8), wherein the inner lining layer (7) is arranged on the outer wall of the second aluminum-plastic composite belt (6).

4. The composite explosion-proof control cable according to claim 1, characterized in that: The conductor (1) is made of copper material with a resistivity of ≤0.016900Ω.m and is twisted into seven strands according to the second-class special soft annealed copper wires.

5. The composite explosion-proof control cable according to claim 1, characterized in that: The tinned drain wire (3) is made of galvanized copper wire with a diameter of more than 0.8 mm as raw material.

6. The composite explosion-proof control cable according to claim 1, characterized in that: The insulating layer (2) is made of silane cross-linked polyethylene insulating material as raw material.

7. The composite explosion-proof control cable according to claim 1, characterized in that: The outer wall of the steel belt (8) is provided with an outer guard (9).

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