Petroleum jelly filled railway long-distance communication cable and preparation method thereof

Abstract

The invention discloses a petroleum jelly filled railway long-distance communication cable and a preparation method thereof, relates to the field of communication cables, and discloses the petroleum jelly filled railway long-distance communication cable, which comprises a conductor assembly used for transmitting electric signals; the insulation assembly is used for providing electrical insulation and preventing electric signal leakage; the filling assembly is used for improving the mechanical strength and waterproof performance of the cable; the shielding assembly is used for shielding electromagnetic interference; the protection assembly is used for protecting the cable from being influenced by the external environment; the insulating assembly wraps the outer side wall of the conductor assembly. The petroleum jelly is adopted as a filling material, experimental data of multiple embodiments prove that the scheme of the first embodiment can remarkably improve the oxidation resistance of the cable, so that the service life of the cable is effectively prolonged, the maintenance cost is reduced, in addition, better mechanical protection can be provided through the high viscosity characteristic of the petroleum jelly, and the service life of the cable is prolonged. And cable damage caused by external mechanical stress is reduced, so that the stability and the reliability of the cable are improved.

Description

Technical Field

[0001] The invention relates to the field of communication cables, and in particular to a petroleum jelly filled railway long-distance communication cable and a preparation method thereof. Background Art

[0002] With the rapid development of railway communication technology, the requirements for railway long-distance communication cables are getting higher and higher. Communication cables are used to transmit electrical signals, connect communication equipment, and realize the transmission of information such as data, voice and video.

[0003] Traditional railway communication cables are easily affected by the external environment when transmitting signals, such as temperature changes, humidity, mechanical stress, etc., which leads to unstable signal transmission or even failure. In addition, the filling materials of traditional communication cables are generally plastic or foam. Since communication cables need to work in the outside world for a long time and at a high intensity after production, plastic or foam materials have certain deficiencies in waterproof and moisture-proof properties, which can easily cause corrosion or short circuit inside the cable, and often require maintenance or replacement, thus affecting the communication quality. Summary of the invention

[0004] In order to make up for the above deficiencies, the present invention provides a petroleum jelly filled railway long-distance communication cable and a method for preparing petroleum jelly, aiming to improve the problem mentioned in the prior art that "long-term high-intensity work easily damages the cable".

[0005] In order to achieve the above object, the present invention adopts the following technical scheme: a petroleum jelly filled railway long-distance communication cable, comprising: Conductor components for transmitting electrical signals; Insulation components, used to provide electrical insulation to prevent leakage of electrical signals; Filling components, used to improve the mechanical strength and waterproof performance of the cable; Shielding components for shielding electromagnetic interference; The protective component is arranged on the outermost side to protect the cable from the influence of the external environment; The insulating component is wrapped around the outer side wall of the conductor component, and a gap is provided between the insulating component and the conductor component, the filling component and the shielding component are both provided at the gap between the insulating component and the conductor component, the protective component is provided on the outer side of the insulating component, and the filling component includes petroleum jelly; The petroleum jelly mainly comprises: 70%-80% of base oil, 10%-30% of thickener, 1%-10% of additive, 0.1%-5% of filler and 0.1%-2% of other agents.

[0006] As a further description of the above technical solution: The conductor component is copper, the main component of the insulating component is cross-linked polyethylene, the shielding component includes a metal shielding layer and a braided shielding layer, the metal shielding layer is located on the outside of the insulating component, and the braided shielding layer is located on the outside of the metal shielding layer, and the metal shielding layer and the braided shielding layer work together to improve the shielding effect of the cable.

[0007] As a further description of the above technical solution: The metal shielding layer is made of aluminum foil or copper foil, and the braided shielding layer is braided from copper wires or aluminum wires, and the braiding density meets specific shielding requirements.

[0008] As a further description of the above technical solution: The protective component comprises an inner sheath and an outer sheath, wherein the inner sheath is located outside the insulating component and the outer sheath is located outside the inner sheath.

[0009] As a further description of the above technical solution: The main component of the inner sheath is polyvinyl chloride (PVC) or low smoke zero halogen (LSZH) material, and the main component of the outer sheath is polyethylene (PE) or polyurethane (PUR) material.

[0010] A method for preparing petroleum jelly comprises the following steps: S1: Prepare materials Prepare 70%-80% base oil, 10%-30% thickener, 1%-10% additive, 0.1%-5% filler and 0.1%-2% other agents; S2: Heating and mixing Select appropriate equipment and adjust to the appropriate temperature to heat the base oil, and heat it until it becomes fluid; S3: Cooling and solidification After heating S2 to a desired state, cooling and molding through suitable equipment until solidified to obtain a semi-finished petroleum jelly; S4: Add other ingredients as needed According to the physical properties of the semi-finished petroleum jelly formed in S3, other agents are added and stirred again, requiring uniform distribution and real-time observation of its physical properties; S5: Quality Inspection The formed petroleum jelly is subjected to quality inspection, including but not limited to performance inspection and appearance inspection.

[0011] As a further description of the above technical solution: The equipment in S2 is selected as a heating kettle, and the heating temperature is controlled at 70-100°C. The equipment in S3 includes but is not limited to a cooling tank. The thickener includes but is not limited to polypropylene, polyurethane, wax and fatty acid salts. The additives include but are not limited to antioxidants, anti-corrosion agents, anti-ultraviolet agents and plasticizers.

[0012] As a further description of the above technical solution: Other agents added in step S4 include but are not limited to talcum powder and calcium carbonate. If the viscosity of the semi-finished petroleum jelly in step S3 is too high, an appropriate plasticizer can be added according to the proportion.

[0013] As a further description of the above technical solution: The performance tests in S5 include but are not limited to viscosity, fluidity and antioxidant tests. The appearance inspection includes ensuring that there are no impurities and the color is uniform. The mixer in S4 is a high-shear mixer, and the speed is controlled at 500-1500 rpm.

[0014] A method for preparing a petroleum jelly filled railway long-distance communication cable comprises the following steps: firstly preparing a conductor component, then sequentially wrapping an insulating component, a filling component, a shielding component and a protective component, ensuring that each component is tightly fitted without bubbles and gaps. The present invention has the following beneficial effects: 1. In the present invention, petroleum jelly is used as the filling material, and the experimental data of multiple embodiments prove that the scheme of embodiment 1 can significantly improve the antioxidant performance of the cable, thereby effectively extending the service life of the cable and reducing maintenance costs. In addition, the high viscosity of petroleum jelly can provide better mechanical protection and reduce cable damage caused by external mechanical stress, thereby improving the stability and reliability of the cable.

[0015] 2. In the present invention, by using cross-linked polyethylene as the main component of the insulating component, the electrical insulation performance of the cable can be significantly improved, and the leakage of electrical signals can be prevented, thereby ensuring the stability and reliability of signal transmission. In addition, cross-linked polyethylene has good heat resistance and anti-aging properties, and can maintain stable physical and chemical properties within a wide temperature range, thereby adapting to various harsh external environments.

[0016] 3. In the present invention, the dual design of the metal shielding layer and the braided shielding layer can effectively shield electromagnetic interference and ensure the purity of signal transmission. The metal shielding layer can reflect and absorb part of the electromagnetic waves, while the braided shielding layer can further block the penetration of electromagnetic waves through its high-density braiding structure, thereby providing double protection for the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1The present invention is a schematic diagram of the components of a petroleum jelly filled railway long-distance communication cable.

[0018] Figure 2 The present invention is a schematic diagram of the production process of a method for preparing petroleum jelly.

[0019] Legend: 1. Conductor assembly; 2. Insulation assembly; 3. Filling assembly; 4. Shielding assembly; 5. Protection assembly. DETAILED DESCRIPTION

[0020] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0021] Embodiment 1 Reference Figure 1 , Figure 2 The present invention provides a petroleum jelly filled railway long-distance communication cable, comprising: The conductor component 1 is used for transmitting electrical signals and its material is copper; Insulation component 2, used to provide electrical insulation to prevent leakage of electrical signals, the main component of which is cross-linked polyethylene; A filling component 3, used to improve the mechanical strength and waterproof performance of the cable; The shielding component 4 is used to shield electromagnetic interference, and mainly includes a metal shielding layer and a braided shielding layer, and the metal shielding layer is located on the outside of the insulating component 2, and the braided shielding layer is located on the outside of the metal shielding layer. The metal shielding layer and the braided shielding layer work together to improve the shielding effect of the cable. Furthermore, the metal shielding layer is composed of aluminum foil or copper foil, and the braided shielding layer is woven from copper wire or aluminum wire, and the braiding density meets specific shielding requirements; The protective component 5 is arranged on the outermost side and is used to protect the cable from the influence of the external environment. It mainly includes an inner sheath and an outer sheath. The inner sheath is located on the outside of the insulating component 2, and the outer sheath is located on the outside of the inner sheath. Furthermore, the main component of the inner sheath is polyvinyl chloride PVC or low-smoke halogen-free LSZH material. Polyvinyl chloride PVC is widely used due to its good mechanical properties and chemical resistance, while low-smoke halogen-free LSZH material has lower smoke release and halogen-free toxicity in the event of a fire, providing higher safety. The main component of the outer sheath is polyethylene PE or polyurethane PUR material. Polyethylene PE is widely used in cable outer sheaths due to its excellent electrical insulation properties and resistance to environmental stress cracking. Polyurethane PUR performs well in situations requiring higher mechanical protection due to its excellent wear resistance and flexibility.

[0022] Furthermore, the insulating component 2 is wrapped around the outer wall of the conductor component 1, and a gap is provided between the insulating component 2 and the conductor component 1, the filling component 3 and the shielding component 4 are both arranged in the gap between the insulating component 2 and the conductor component 1, the protective component 5 is arranged on the outer side of the insulating component 2, and the filling component 3 includes petroleum jelly, and the main components of the petroleum jelly include: 75% base oil, 20% thickener, 3% additives, 1% filler and 1% other agents.

[0023] The present invention also provides a method for preparing petroleum jelly, comprising the following steps: S1: Prepare materials Prepare 75% base oil, 20% thickener, 3% additive, 1% filler and 1% other agents, wherein the thickener includes but is not limited to polypropylene, polyurethane, wax and fatty acid salt, and the additive includes but is not limited to antioxidant, anti-corrosion agent, anti-ultraviolet agent and plasticizer; S2: Heating and mixing Select appropriate equipment and adjust it to a suitable temperature to heat the base oil, and heat it until it becomes fluid. The equipment is a heating kettle, and the heating temperature is controlled at 80°C. S3: Cooling and solidification After heating S2 to a desired state, cooling and molding through suitable equipment until solidification to obtain a semi-finished petroleum jelly, wherein the equipment includes but is not limited to a cooling tank; S4: Add other ingredients as needed According to the physical properties of the semi-finished petroleum jelly formed in S3, other agents are added and stirred again. It is required to be evenly distributed and its physical properties are observed in real time. The other agents include but are not limited to talcum powder and calcium carbonate. In addition, when the viscosity of the semi-finished petroleum jelly is too high, an appropriate plasticizer can be added according to the proportion. The mixer is a high-shear mixer, and the speed is controlled at 1000 rpm.

[0024] S5: Quality Inspection The quality of the formed petroleum jelly is tested, including but not limited to performance testing and appearance inspection. The performance test includes but is not limited to viscosity, fluidity and antioxidant testing, and the appearance inspection includes ensuring that there are no impurities and the color is uniform.

[0025] The present invention also provides a method for preparing a petroleum jelly filled railway long-distance communication cable, comprising the following steps: first preparing a conductor component 1, and then wrapping an insulating component 2, a filling component 3, a shielding component 4 and a protective component 5 in sequence, ensuring that the components are tightly fitted without bubbles and gaps.

[0026] Embodiment 2: Comparative Example 1, Example 2, under the premise that other components and processing procedures remain unchanged, the components of base oil, thickener, additives, filler and other agents are adjusted to 70% base oil, 20% thickener, 5% additives, 3% filler and 2% other agents.

[0027] Embodiment three: Comparing Examples 1 and 2, in Example 3, under the premise that other components and processing procedures remain unchanged, the components of base oil, thickener, additives, filler and other agents are adjusted to 80% base oil, 17.7% thickener, 2% additive, 0.1% filler and 0.2% other agents.

[0028] Embodiment 4: Comparing Examples 1, 2 and 3, Example 4 adjusts the composition of base oil, thickener, additive, filler and other agents to 76.5% base oil, 18% thickener, 2% additive, 2% filler and 1.5% other agents under the premise that other components and processing procedures remain unchanged.

[0029] Embodiment five: Comparing Examples 1, 2, 3 and 4, Example 5 adjusts the composition of base oil, thickener, additive, filler and other agents to 77% base oil, 20% thickener, 2% additive, 0.5% filler and 0.5% other agents under the premise that other components and processing procedures remain unchanged.

[0030] Get the following data table Example No. Base oil (%) Thickener (%) additive(%) Filler (%) Other agents (%) Viscosity (cP) Fluidity (mm / s) Antioxidant activity (h) Embodiment 1 75 20 3 1 1 1500 25 500 Embodiment 2 70 20 5 3 2 1400 28 480 Embodiment 3 80 17.7 2 0.1 0.2 1600 22 520 Embodiment 4 76.5 18 2 2 1.5 1550 26 510 Embodiment 5 77 20 2 0.5 0.5 1450 27 490 Note: The viscosity test was performed using a rotational viscometer and the unit was centipoise (cP); The flowability test is evaluated by measuring the distance (mm / s) that petroleum jelly flows under standard conditions over a certain period of time; The oxidation resistance test is carried out under specific conditions, and the time (h) required for the sample to begin to oxidize to a certain extent is recorded.

[0031] The data experiments of multiple embodiments show that: The petroleum jelly formula of Example 1 performs well in terms of viscosity and fluidity, and its antioxidant property also reaches 500 hours, which is suitable for cable filling under general environment. Example 2 slightly reduces the antioxidant property while maintaining good viscosity and fluidity, but increases the proportion of filler and other agents, which may help to improve the mechanical strength and durability of the cable.

[0032] The petroleum jelly formula of Example 3 has a higher proportion of base oil, which leads to increased viscosity and slightly decreased fluidity, but improved oxidation resistance. This indicates that in some special environments, such as high temperature or high humidity environments, this formula may be more suitable.

[0033] While keeping the base oil ratio relatively stable, Example 4 and Example 5 fine-tuned the ratio of thickener, additive, filler and other agents. Example 4 slightly improved the antioxidant property while maintaining good viscosity and fluidity, while Example 5 performed better in viscosity and fluidity, but the antioxidant property decreased slightly. Taking all factors into consideration, the formula of Example 1 performed balanced under general conditions and was suitable for most cable filling applications.

[0034] 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, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to 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 petroleum jelly filled railway long-distance communication cable, characterized in that: include: A conductor assembly (1) for transmitting electrical signals; An insulating component (2) is used to provide electrical insulation to prevent leakage of electrical signals; A filling component (3) for improving the mechanical strength and waterproof performance of the cable; A shielding component (4) for shielding electromagnetic interference; A protective component (5) is arranged at the outermost side and is used to protect the cable from the influence of the external environment; The insulating component (2) is wrapped around the outer wall of the conductor component (1), and a gap is provided between the insulating component (2) and the conductor component (1), the filling component (3) and the shielding component (4) are both arranged in the gap between the insulating component (2) and the conductor component (1), the protective component (5) is arranged on the outer side of the insulating component (2), and the filling component (3) comprises petroleum jelly; The petroleum jelly mainly comprises: 70%-80% of base oil, 10%-30% of thickener, 1%-10% of additive, 0.1%-5% of filler and 0.1%-2% of other agents.

2. The petroleum jelly filled railway long-distance communication cable according to claim 1, characterized in that: The conductor component (1) is copper, the main component of the insulating component (2) is cross-linked polyethylene, and the shielding component (4) comprises a metal shielding layer and a braided shielding layer, the metal shielding layer is located on the outside of the insulating component (2), and the braided shielding layer is located on the outside of the metal shielding layer, and the metal shielding layer and the braided shielding layer work together to improve the shielding effect of the cable.

3. The petroleum jelly filled railway long-distance communication cable according to claim 1, characterized in that: The metal shielding layer is made of aluminum foil or copper foil, and the braided shielding layer is braided from copper wires or aluminum wires, and the braiding density meets specific shielding requirements.

4. The petroleum jelly filled railway long-distance communication cable according to claim 1, characterized in that: The protective component (5) comprises an inner sheath and an outer sheath, the inner sheath being located outside the insulating component (2) and the outer sheath being located outside the inner sheath.

5. The petroleum jelly filled railway long-distance communication cable according to claim 1, characterized in that: The main component of the inner sheath is polyvinyl chloride (PVC) or low smoke zero halogen (LSZH) material, and the main component of the outer sheath is polyethylene (PE) or polyurethane (PUR) material.

6. A method for preparing a petroleum jelly according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1: Prepare materials Prepare 70%-80% base oil, 10%-30% thickener, 1%-10% additive, 0.1%-5% filler and 0.1%-2% other agents; S2: Heating and mixing Select appropriate equipment and adjust to the appropriate temperature to heat the base oil, and heat it until it becomes fluid; S3: Cooling and solidification After heating S2 to a desired state, cooling and molding through suitable equipment until solidified to obtain a semi-finished petroleum jelly; S4: Add other ingredients as needed According to the physical properties of the semi-finished petroleum jelly formed in S3, other agents are added and stirred again, requiring uniform distribution and real-time observation of its physical properties; S5: Quality Inspection The formed petroleum jelly is subjected to quality inspection, including but not limited to performance inspection and appearance inspection.

7. The method for preparing petroleum jelly according to claim 6, characterized in that: The equipment in S2 is selected as a heating kettle, and the heating temperature is controlled at 70-100°C. The equipment in S3 includes but is not limited to a cooling tank. The thickener includes but is not limited to polypropylene, polyurethane, wax and fatty acid salts. The additives include but are not limited to antioxidants, anti-corrosion agents, anti-ultraviolet agents and plasticizers.

8. The method for preparing petroleum jelly according to claim 1, characterized in that: Other agents added in step S4 include but are not limited to talcum powder and calcium carbonate. If the viscosity of the semi-finished petroleum jelly in step S4 is too high, an appropriate plasticizer can be added according to the proportion.

9. The method for preparing petroleum jelly according to claim 1, characterized in that: The performance tests in S5 include but are not limited to viscosity, fluidity and antioxidant tests. The appearance inspection includes ensuring that there are no impurities and the color is uniform. The mixer in S3 is a high-shear mixer, and the speed is controlled at 500-1500 rpm.

10. A method for preparing a petroleum jelly filled railway long-distance communication cable according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: firstly preparing a conductor component (1), and then wrapping an insulating component (2), a filling component (3), a shielding component (4) and a protective component (5) in sequence, ensuring that the components are tightly fitted to each other without bubbles or gaps.

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