Fire-resistant composite shielding transponder data transmission cable

Abstract

The utility model discloses a fire-resistant composite shielding transponder data transmission cable, which comprises a four-wire group formed by twisting, the four-wire group comprises four kinds of insulating single wires, each insulating single wire comprises a conductor and an insulating layer, and a high-strength polyester wrapping tape, a graphene conductive film, a metal wire braided shielding layer and an outer sheath are sequentially arranged outside the insulating layer. According to the fire-resistant composite shielding transponder data transmission cable, the graphene conductive film has relatively good electronic shielding and electromagnetic wave absorption characteristics, so that the cable has the possibility of being used as an electromagnetic shielding film in an electronic product; the graphene conductive film can avoid shielding gaps existing in metal wire braiding, improves the shielding effect of only metal wire braiding shielding, prevents electromagnetic interference, has very high strength and toughness, can improve the cable core protection strength of the cable before braiding, has heat resistance, and can effectively prevent electromagnetic interference. And the graphene conductive film is not damaged when the outer sheath is extruded.

Description

Technical Field

[0001] The utility model relates to the technical field of data transmission cables, in particular to a fire-resistant composite shielded transponder data transmission cable. Background Art

[0002] The transponder data transmission cable is mainly used to connect the transponder to the LEU ground electronic unit. It can transmit signals at high frequencies without distortion and has high voltage resistance and insulation resistance. It is suitable for electrified railways or sections with strong electromagnetic interference and can transmit signals at high frequencies without distortion.

[0003] For example, a Class B1 transponder data transmission cable with publication number CN217405166U includes an aluminum-plastic conductive film, an oxygen-isolating layer wrapped with a layer of aluminum-plastic conductive film, and a metal wire braided shielding layer is provided outside the aluminum-plastic conductive film. Since the aluminum-plastic conductive film has good electronic shielding and electromagnetic wave absorption properties, the use of the aluminum-plastic conductive film can avoid the existence of shielding gaps in the metal wire braiding, improve the shielding effect of the metal wire braided shielding layer alone, and prevent electromagnetic interference.

[0004] The above-mentioned transponder data transmission cable uses a conductive film to make it anti-interference capable. Since the thickness of the aluminum-plastic tape conductive film is relatively thick, the thickness will affect the bending degree of the cable. At the same time, the thickness of the aluminum-plastic tape conductive film is related to the shielding effect. The thicker the aluminum-plastic tape conductive film, the better the effect. Increasing the thickness will lead to increased absorption loss, thereby improving the shielding effect. When the application scenario of the transponder data transmission cable requires a high shielding effect, a thicker transponder data transmission cable needs to be produced. Utility Model Content

[0005] The purpose of the present utility model is to provide a fire-resistant composite shielded transponder data transmission cable to solve the problem raised in the above background technology that the application scenarios of transponder data transmission cables on the current market require high shielding effects, and therefore it is necessary to produce thicker transponder data transmission cables.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a fire-resistant composite shielded transponder data transmission cable, comprising a twisted quad group, the quad group comprising four insulated single wires, each of the insulated single wires comprising a conductor and an insulation layer, and a high-strength polyester tape, a graphene conductive film, a metal wire braided shielding layer and an outer sheath are sequentially arranged outside the insulation layer.

[0007] Preferably, a plurality of groups of protective elements are installed at equal intervals on the outside of the outer sheath, and each group of protective elements is composed of a plurality of protective strips surrounding the outside of the outer sheath;

[0008] Several groups of support members are mounted on the outer sheath. Each group of support members consists of two special-shaped rainbow rings and one regular-shaped rainbow ring. A special-shaped rainbow ring is installed at both ends of a regular-shaped rainbow ring in each group of support members, and two adjacent support members are fixed together.

[0009] Preferably, the length of the protective strip is less than the total length of each group of support members, and the special-shaped rainbow ring is a truncated cone structure, and the diameter of the regular rainbow ring is the same as the maximum diameter of the special-shaped rainbow ring.

[0010] Preferably, the insulated single wire consists of a conductor and an insulating layer, the insulating layer is made of ceramic halogen-free low-smoke polyolefin flame retardant and fire-resistant material, and the four-wire group is formed by twisting four different colors of insulated single wires of red, green, white and blue.

[0011] Preferably, the conductor is a fifth type of twisted soft conductor structure, and the conductor nominal cross-section is 0.75mm 2 , the outer diameter of the stranded conductor is 1.14mm.

[0012] Preferably, the metal wire braided shielding layer is woven with a single layer of copper wire, the minimum diameter of the braided copper wire is 0.1 mm, and the copper wire braiding density is not less than 85%.

[0013] Preferably, the distance between each group of protective elements is less than the sum of the heights of the two special-shaped rainbow rings, the maximum diameter of the special-shaped rainbow ring is the diameter of the protective strip, and the minimum diameter of the special-shaped rainbow ring is the outer diameter of the outer sheath.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. The utility model adopts graphene conductive film inside. The graphene conductive film has good electronic shielding and electromagnetic wave absorption properties, which makes it possible to be used as an electromagnetic shielding film in electronic products. The use of graphene conductive film can avoid the existence of shielding gaps in metal wire weaving, improve the shielding effect of only metal wire weaving shielding, and prevent electromagnetic interference. The graphene conductive film has very high strength and toughness, which can improve the protective strength of the cable core before weaving, and prevent the shielding metal wire from being penetrated into the cable core due to broken wires, burrs, etc. during weaving, thereby affecting the insulation performance and characteristic impedance. At the same time, the graphene conductive film is heat-resistant and will not be damaged when the outer sheath is extruded.

[0016] 2. Compared with the existing technology, the ceramic halogen-free low-smoke polyolefin flame retardant and fire-resistant insulation material of this utility model does not absorb moisture and water, has a dielectric strength of ≥26MV / m at room temperature, and a volume resistivity of ≥2×10 15 Ω·m; after ablation, uniform ceramic micropores will be generated on the hard armor section. The dielectric strength of the ceramic armor is greater than 40KV / mm, and the volume resistivity is greater than 2×10 18Ω·m or above, as an insulating layer, it is equivalent to omitting the fireproof layer and oxygen barrier layer, which can simplify the process, improve production efficiency, and reduce production costs. The ceramic armor of the ceramic halogen-free low-smoke polyolefin flame retardant and fire-resistant insulation material can form honeycomb ceramic fine pores, which can play a good role in fire insulation, heat insulation, temperature insulation and fire blocking. The excellent flame retardant performance can play a good fire prevention role.

[0017] 3. A protective strip is provided on the outside of the outer sheath of the utility model to protect the cable. There is a spacing between each set of protective parts. The protective parts limit the special-shaped rainbow ring and the regular rainbow ring to avoid relative sliding. The special-shaped rainbow ring and the regular rainbow ring wrap the cable to prevent the cable from being worn against the ground during the pulling process. At the same time, the special-shaped rainbow ring and the regular rainbow ring are relatively flexible and will not affect the normal bending of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of the regular rainbow ring of the utility model;

[0019] Figure 2 This is a schematic diagram of the three-dimensional structure of the twisted soft conductor of the utility model;

[0020] Figure 3 This is a schematic diagram of the three-dimensional structure of the transmission cable of the utility model;

[0021] Figure 4 This is a schematic diagram of the top-sectional structure of the utility model;

[0022] Figure 5 This is a schematic diagram of the structure of the regular rainbow ring of the utility model.

[0023] In the figure: 1. Conductor; 2. Insulation layer; 3. High-strength polyester tape; 4. Graphene conductive film; 5. Metal wire braided shielding layer; 6. Outer sheath; 7. Protective strip; 8. Special-shaped rainbow ring; 9. Regular-shaped rainbow ring. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] See also Figure 1-Figure 5 , the utility model provides the following technical solutions:

[0026] A fire-resistant composite shielded transponder data transmission cable includes a twisted quad group, the quad group includes four insulated single wires, each insulated single wire includes a conductor 1 and an insulating layer 2, and a high-strength polyester tape 3, a graphene conductive film 4, a metal wire braided shielding layer 5 and an outer sheath 6 are sequentially arranged outside the insulating layer 2.

[0027] The insulated single wire consists of conductor 1 and insulation layer 2. The insulation layer 2 is made of ceramic halogen-free low-smoke polyolefin flame retardant and fire-resistant material. The four-wire group is made of four different colors of insulated single wires of red, green, white and blue. Conductor 1 is the fifth type of twisted soft conductor structure. The nominal cross-section of conductor 1 is 0.75mm 2 The outer diameter of the twisted conductor is 1.14 mm, which ensures the transmission performance of the conductor 1 while ensuring the flexibility of the conductor 1, greatly reducing the chance of damage during use.

[0028] The metal wire braided shielding layer 5 is woven with a single layer of copper wire. The minimum diameter of the braided copper wire is 0.1 mm, and the copper wire braiding density is not less than 85%. By setting the copper wire diameter and braiding density of the metal wire braided shielding layer 5, the flexibility of the metal wire braided shielding layer 5 is ensured while shielding external electromagnetic interference.

[0029] Multiple groups of protective parts are installed at equal intervals on the outside of the outer sheath 6, and each group of protective parts consists of multiple protective strips 7 surrounding the outside of the outer sheath 6; several groups of support parts are sleeved on the outer sheath 6, and each group of support parts consists of two special-shaped rainbow rings 8 and one regular rainbow ring 9. A special-shaped rainbow ring 8 is installed at both ends of a regular rainbow ring 9 in each group of support parts, and two adjacent support parts are fixed together. The length of the protective strip 7 is less than the total length of each group of support parts, and the special-shaped rainbow ring 8 is a truncated cone structure. The diameter of the regular rainbow ring 9 is the same as the maximum diameter of the special-shaped rainbow ring 8.

[0030] The spacing between each set of protective parts is less than the sum of the heights of the two special-shaped rainbow rings 8. The maximum diameter of the special-shaped rainbow ring 8 is the diameter of the protective strip 7, and the minimum diameter of the special-shaped rainbow ring 8 is the outer diameter of the outer sheath 6. Through the structure of the special-shaped rainbow ring 8 and the regular rainbow ring 9, the whole can be wrapped around the outside of the cable to protect the cable, avoiding wear on the outer surface of the cable from contacting the ground when the cable is pulled, thereby protecting the cable.

[0031] When making the transponder data transmission cable, first make a single insulated single wire, and stretch the copper rod or aluminum rod into a diameter of 0.75mm through a wire drawing machine. 2The monofilament is annealed after stretching to increase its flexibility, and the oil and oxide layer on the surface of the monofilament are cleaned and removed. A suitable stranding machine is selected, and the stranding parameters are set. The prepared monofilament is placed on the pay-off reel of the stranding machine, and the stranding machine is started. The monofilament is twisted into a conductor of the required cross-sectional area according to the set parameters, and the conductor is passed through the extruder. A layer of insulating material is evenly coated on the outside of the conductor to make four insulated single wires of different colors. After that, the different insulated single wires are passed through the stranding machine to form a four-core cable, and then the four-wire groups are wound with high-strength polyester tape 3, graphene conductive film 4 and metal wire braided shielding layer 5 in turn through the winding machine. Finally, the outer sheath 6 is extruded on the metal wire braided shielding layer 5 through the extruder to form a fire-resistant composite shielded transponder data transmission cable.

[0032] 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 scope of protection of the present invention.

Claims

1. A fire-resistant composite shielded transponder data transmission cable comprising a twisted quad, characterized in that: The four-wire group includes four insulated single wires, each of which includes a conductor (1) and an insulating layer (2), and a high-strength polyester wrapping tape (3), a graphene conductive film (4), a metal wire braided shielding layer (5) and an outer sheath (6) are sequentially arranged outside the insulating layer (2).

2. The fire-resistant composite shielded transponder data transmission cable according to claim 1, characterized in that: A plurality of groups of protective elements are installed at equal intervals on the outside of the outer sheath (6), and each group of protective elements is composed of a plurality of protective strips (7) surrounding the outside of the outer sheath (6); A plurality of groups of support members are sleeved on the outer sheath (6), each group of support members is composed of two special-shaped rainbow rings (8) and one regular-shaped rainbow ring (9), and a special-shaped rainbow ring (8) is installed at both ends of a regular-shaped rainbow ring (9) in each group of support members, and two adjacent support members are fixed together.

3. The fire-resistant composite shielded transponder data transmission cable according to claim 2, characterized in that: The length of the protective strip (7) is less than the total length of each group of support members, and the special-shaped rainbow ring (8) is a truncated cone structure, and the diameter of the regular rainbow ring (9) is the same as the maximum diameter of the special-shaped rainbow ring (8).

4. The fire-resistant composite shielded transponder data transmission cable according to claim 1, characterized in that: The insulated single wire is composed of a conductor (1) and an insulating layer (2), the insulating layer (2) is made of a ceramic halogen-free low-smoke polyolefin flame-retardant fire-resistant material, and the four-wire group is formed by twisting four different colored insulating single wires of red, green, white and blue.

5. The fire-resistant composite shielded transponder data transmission cable according to claim 1, characterized in that: The conductor (1) is a fifth type of twisted soft conductor structure, and the conductor (1) has a nominal cross-section of 0.75 mm 2 , the outer diameter of the stranded conductor is 1.14mm.

6. The fire-resistant composite shielded transponder data transmission cable according to claim 1, characterized in that: The metal wire braided shielding layer (5) is braided with a single layer of copper wire, the minimum diameter of the braided copper wire is 0.1 mm, and the copper wire braiding density is not less than 85%.

7. The fire-resistant composite shielded transponder data transmission cable according to claim 2, characterized in that: The spacing between each group of protective elements is less than the sum of the heights of the two special-shaped rainbow rings (8), the maximum diameter of the special-shaped rainbow ring (8) is the diameter of the protective strip (7), and the minimum diameter of the special-shaped rainbow ring (8) is the outer diameter of the outer sheath (6).

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