Oxygen-isolating flame-retardant fire-resistant cable

Abstract

The utility model discloses an oxygen-isolating flame-retardant fire-resistant cable, and belongs to the technical field of fire-resistant cables. Comprising a plurality of insulating sleeves, a plurality of conductor cores are arranged in the insulating sleeves, an electromagnetic shielding sleeve is fixedly connected among the insulating sleeves in a sleeving mode, and a flame-retardant oxygen-isolation inner sleeve is arranged on the periphery of the electromagnetic shielding sleeve. The flame-retardant layer in the flame-retardant oxygen-isolating inner sleeve can ensure that the cable can still keep a certain insulating property at high temperature, the lower halogen-free surface layer and the upper halogen-free surface layer in the flame-retardant oxygen-isolating inner sleeve can prevent harmful gas from being generated under the high-temperature fireproof condition, a good environment-friendly effect is achieved, the flame-retardant property and the environment-friendly property are further improved, and the flame-retardant performance and the environment-friendly property of the cable are improved. The metal woven mesh between the lower halogen-free skin and the upper halogen-free skin enhances the mechanical strength and the fire resistance of the cable, and improves the anti-electromagnetic interference capability at the same time.

Description

Technical Field

[0001] This application relates to the technical field of fire-resistant cables, and more specifically, to a fire-resistant cable with oxygen isolation and flame retardancy. Background Art

[0002] A fire-resistant cable with oxygen isolation and flame retardancy is a specially designed cable with excellent fire protection performance and durability. It can effectively prevent oxygen from entering the interior of the cable, thereby reducing the fire risk. This cable can maintain certain electrical performance when suffering from a fire, which helps to protect the safe operation of the power system and equipment;

[0003] However, in the high-temperature combustion environment of existing fire-resistant cables, the insulation performance of the cable will decline rapidly over time, making it difficult to meet the standard requirements of insulation performance. At the same time, the cable may produce toxic and harmful gases at high temperatures, affecting the vision and personal safety of firefighters.

[0004] In view of this, we propose a fire-resistant cable with oxygen isolation and flame retardancy. Summary of the Utility Model

[0005] The purpose of this application is to provide a fire-resistant cable with oxygen isolation and flame retardancy, which solves the technical problems in the above background art.

[0006] The technical solution of this application provides a fire-resistant cable with oxygen isolation and flame retardancy, including a plurality of insulating sleeves. A plurality of conductor cores are arranged inside the insulating sleeves. An electromagnetic shielding sleeve is fixedly sleeved between the plurality of insulating sleeves. A flame-retardant oxygen-isolating inner sleeve is arranged outside the electromagnetic shielding sleeve. An outer sheath is arranged outside the flame-retardant oxygen-isolating inner sleeve. The flame-retardant oxygen-isolating inner sleeve includes a refractory layer, a lower halogen-free skin, a metal braided mesh, and an upper halogen-free skin. The refractory layer is fixedly sleeved with the lower halogen-free skin on the outside. The lower halogen-free skin is fixedly sleeved with the metal braided mesh on the outside. The metal braided mesh is fixedly sleeved with the upper halogen-free skin on the outside.

[0007] Optionally, support positioning bars are arranged between the plurality of insulating sleeves. Adhesive is coated between the flame-retardant oxygen-isolating inner sleeve and the electromagnetic shielding sleeve and between the flame-retardant oxygen-isolating inner sleeve and the outer sheath. The inside of the electromagnetic shielding sleeve is filled with insulating filler glue.

[0008] Optionally, the outer sheath includes a flame-retardant polyvinyl chloride sleeve, buffer holes, support tubes, and a waterproof layer. A plurality of buffer holes are opened inside the flame-retardant polyvinyl chloride sleeve, and the plurality of buffer holes are evenly distributed in a ring shape. Support tubes are fixedly inserted into the buffer holes.

[0009] Optionally, the flame-retardant polyvinyl chloride sleeve is fixedly sleeved with a waterproof layer on the outside, and the material of the waterproof layer is polyethylene.

[0010] Optionally, the material of the electromagnetic shielding sleeve is a conductive polymer.

[0011] Optionally, the material of the refractory layer is ceramized silicone rubber.

[0012] One or more technical solutions provided in the technical solution of the present application have at least the following technical effects or advantages:

[0013] In the present application, by providing a flame-retardant and oxygen-isolating inner sleeve and an outer sheath around the electromagnetic shielding sleeve, the refractory layer inside the flame-retardant and oxygen-isolating inner sleeve can ensure that the cable still maintains a certain insulation performance at high temperatures. The lower halogen-free skin and the upper halogen-free skin inside the flame-retardant and oxygen-isolating inner sleeve can prevent the generation of harmful gases in the case of high-temperature fire, achieving a good environmental protection effect, further improving the flame-retardant performance and environmental friendliness. The metal braid between the lower halogen-free skin and the upper halogen-free skin enhances the mechanical strength and refractory performance of the cable, and at the same time improves the anti-electromagnetic interference ability;

[0014] The flame-retardant polyvinyl chloride sleeve inside the outer sheath can protect the cable from the erosion of the external environment, and at the same time improve the overall flame-retardant performance of the cable. The multiple support tubes inside the flame-retardant polyvinyl chloride sleeve have good elasticity, can play a good role in buffering and anti-collision, and improve the service life of the cable. The waterproof layer on the flame-retardant polyvinyl chloride sleeve is made of polyethylene, and the waterproof layer made of polyethylene has good electrical insulation performance and corrosion resistance, and can effectively protect the inside of the cable from the invasion of external moisture and water. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the oxygen-isolating and flame-retardant fire-resistant cable disclosed in the embodiment of the present application;

[0016] Figure 2 It is a schematic diagram of the structure of the flame-retardant and oxygen-isolating inner sleeve of the oxygen-isolating and flame-retardant fire-resistant cable disclosed in the embodiment of the present application;

[0017] Figure 3 It is a schematic diagram of the structure of the outer sheath of the oxygen-isolating and flame-retardant fire-resistant cable disclosed in the embodiment of the present application;

[0018] Explanation of the reference numerals in the figure: 1, insulating sleeve; 2, conductor core; 3, support positioning strip; 4, electromagnetic shielding sleeve; 5, insulating filling glue; 6, flame-retardant and oxygen-isolating inner sleeve; 7, outer sheath; 8, adhesive; 601, refractory layer; 602, lower halogen-free skin; 603, metal braid; 604, upper halogen-free skin; 701, flame-retardant polyvinyl chloride sleeve; 702, buffer hole; 703, support tube; 704, waterproof layer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The present application will be further described in detail below with reference to the accompanying drawings of the specification.

[0020] Refer to Figures 1 - 3, an embodiment of the present application provides a fire-resistant cable with oxygen isolation and flame retardancy, including a plurality of insulating sleeves 1. A plurality of conductor cores 2 are arranged inside the insulating sleeves 1. An electromagnetic shielding sleeve 4 is fixedly sleeved between the plurality of insulating sleeves 1. The material of the electromagnetic shielding sleeve 4 is a conductive polymer, and the conductive polymer can improve the electromagnetic shielding performance of the cable and reduce electromagnetic interference. A flame-retardant oxygen-isolating inner sleeve 6 is arranged outside the electromagnetic shielding sleeve 4, and an outer sheath 7 is arranged outside the flame-retardant oxygen-isolating inner sleeve 6. The flame-retardant oxygen-isolating inner sleeve 6 includes a fire-resistant layer 601, a lower halogen-free skin 602, a metal braided mesh 603, and an upper halogen-free skin 604. The fire-resistant layer 601 is fixedly sleeved with the lower halogen-free skin 602 on the outside, the lower halogen-free skin 602 is fixedly sleeved with the metal braided mesh 603 on the outside, and the metal braided mesh 603 is fixedly sleeved with the upper halogen-free skin 604 on the outside. The material of the fire-resistant layer 601 is ceramicized silicone rubber, and the ceramicized silicone rubber can ensure that the cable still maintains a certain insulation performance at high temperatures. The lower halogen-free skin 602 and the upper halogen-free skin 604 inside the flame-retardant oxygen-isolating inner sleeve 6 can prevent the generation of harmful gases in the case of high-temperature fire prevention, achieving a good environmental protection effect and further improving the flame-retardant performance and environmental friendliness. The metal braided mesh 603 between the lower halogen-free skin 602 and the upper halogen-free skin 604 enhances the mechanical strength and fire-resistant performance of the cable, and at the same time improves the anti-electromagnetic interference ability.

[0021] Refer to Figure 1 , a support positioning strip 3 is arranged between the plurality of insulating sleeves 1. The support positioning strip 3 plays a role in positioning and supporting the plurality of insulating sleeves 1, preventing the plurality of insulating sleeves 1 from winding together. Adhesive 8 is coated between the flame-retardant oxygen-isolating inner sleeve 6 and the electromagnetic shielding sleeve 4 and between the flame-retardant oxygen-isolating inner sleeve 6 and the outer sheath 7. The inside of the electromagnetic shielding sleeve 4 is filled with insulating filling glue 5. After the insulating filling glue 5 solidifies, it fixes the group of the plurality of insulating sleeves 1 and at the same time achieves a good insulation and isolation effect, preventing mutual influence between the plurality of insulating sleeves 1.

[0022] Refer to Figure 3 , the outer sheath 7 includes a flame-retardant polyvinyl chloride sleeve 701, buffer holes 702, support tubes 703, and a waterproof layer 704. A plurality of buffer holes 702 are opened inside the flame-retardant polyvinyl chloride sleeve 701, and the plurality of buffer holes 702 are evenly distributed in a ring shape. Support tubes 703 are fixedly inserted inside the buffer holes 702. The flame-retardant polyvinyl chloride sleeve 701 inside the outer sheath 7 can protect the cable from the erosion of the external environment, and at the same time improve the overall flame-retardant performance of the cable. The plurality of support tubes 703 inside the flame-retardant polyvinyl chloride sleeve 701 have good elasticity and can play a good role in buffering and anti-collision, improving the service life of the cable. A waterproof layer 704 is fixedly sleeved outside the flame-retardant polyvinyl chloride sleeve 701, and the material of the waterproof layer 704 is polyethylene. The waterproof layer 704 made of polyethylene has good electrical insulation performance and corrosion resistance, and can effectively protect the inside of the cable from the invasion of external moisture and water.

[0023] Working principle: During the production of fire-resistant cables, multiple conductor cores 2 are inserted into the insulating sleeve 1. Prepare multiple groups of insulating sleeves 1. Insert the support positioning bars 3 between the multiple groups of insulating sleeves 1. The support positioning bars 3 play a role in positioning and supporting multiple groups of insulating sleeves 1, preventing the multiple insulating sleeves 1 from winding together. Insert the multiple groups of insulating sleeves 1 and the support positioning bars 3 into the electromagnetic shielding sleeve 4 made of conductive polymer. Then, fill the electromagnetic shielding sleeve 4 with insulating filling glue 5. The conductive polymer can improve the electromagnetic shielding performance of the cable and reduce electromagnetic interference. After the insulating filling glue 5 solidifies, it fixes the multiple groups of insulating sleeves 1 and at the same time has a good insulating and isolating effect, preventing the multiple insulating sleeves 1 from affecting each other. Then, apply adhesive 8 on the outer wall of the electromagnetic shielding sleeve 4, and install the flame-retardant oxygen-isolating inner sleeve 6 on the periphery of the electromagnetic shielding sleeve 4. After the adhesive 8 solidifies, apply adhesive 8 on the outer wall of the flame-retardant oxygen-isolating inner sleeve 6, and install the outer sheath 7 on the periphery of the flame-retardant oxygen-isolating inner sleeve 6. After the adhesive 8 solidifies, this fire-resistant cable can be used. The flame-retardant oxygen-isolating inner sleeve 6 of this fire-resistant cable is composed of a fire-resistant layer 601, a lower-layer halogen-free skin 602, a metal braided mesh 603, and an upper-layer halogen-free skin 604. The fire-resistant layer 601 made of ceramized silicone rubber can ensure that the cable still maintains a certain insulating performance at high temperatures. The lower-layer halogen-free skin 602 and the upper-layer halogen-free skin 604 can prevent the generation of harmful gases under high-temperature fire conditions, achieving a good environmental protection effect and further enhancing the flame-retardant performance and environmental friendliness. The metal braided mesh 603 enhances the mechanical strength and fire-resistant performance of the cable, and at the same time improves the anti-electromagnetic interference ability. The flame-retardant PVC sleeve 701 inside the outer sheath 7 can protect the cable from the erosion of the external environment and at the same time improve the overall flame-retardant performance of the cable. Moreover, the multiple support tubes 703 inside the flame-retardant PVC sleeve 701 have good elasticity and can play a good role in buffering and anti-collision, enhancing the service life of the cable. The waterproof layer 704 on the flame-retardant PVC sleeve 701 is made of polyethylene. The polyethylene waterproof layer 704 has good electrical insulation performance and corrosion resistance, and can effectively protect the inside of the cable from the invasion of external moisture and water.

[0024] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. An oxygen-insulating, flame-retardant, fire-resistant cable, comprising a plurality of insulating sleeves (1), characterized in that: A plurality of conductor cores (2) are arranged inside the insulating sleeve (1), an electromagnetic shielding sleeve (4) is fixedly sleeved between the plurality of insulating sleeves (1), a flame retardant oxygen-isolating inner sleeve (6) is arranged on the periphery of the electromagnetic shielding sleeve (4), an outer sheath (7) is arranged on the periphery of the flame retardant oxygen-isolating inner sleeve (6), the flame retardant oxygen-isolating inner sleeve (6) comprises a fire-resistant layer (601), a lower halogen-free skin (602), a metal braided mesh (603) and an upper halogen-free skin (604), the fire-resistant layer (601) is fixedly sleeved with the lower halogen-free skin (602) on the periphery, the lower halogen-free skin (602) is fixedly sleeved with the metal braided mesh (603) on the periphery, and the upper halogen-free skin (604) is fixedly sleeved with the metal braided mesh (603) on the periphery.

2. The oxygen-insulated, flame-retardant, fire-resistant cable according to claim 1, characterized in that: Support positioning strips (3) are provided between the plurality of insulating sleeves (1), adhesive glue (8) is applied between the flame-retardant oxygen-isolating inner sleeve (6) and the electromagnetic shielding sleeve (4) and between the flame-retardant oxygen-isolating inner sleeve (6) and the outer sleeve (7), and the interior of the electromagnetic shielding sleeve (4) is filled with insulating filling glue (5).

3. The oxygen-insulated, flame-retardant, fire-resistant cable according to claim 1, characterized in that: The outer sheath (7) comprises a flame-retardant polyvinyl chloride sleeve (701), a buffer hole (702), a support tube (703) and a waterproof layer (704); a plurality of buffer holes (702) are provided inside the flame-retardant polyvinyl chloride sleeve (701), and the plurality of buffer holes (702) are evenly distributed in a ring shape; and a support tube (703) is fixedly inserted inside the buffer hole (702).

4. The oxygen-insulated, flame-retardant, fire-resistant cable according to claim 3, characterized in that: The outer periphery of the flame-retardant polyvinyl chloride sleeve (701) is fixedly sleeved with a waterproof layer (704), and the material of the waterproof layer (704) is polyethylene.

5. The oxygen-insulated, flame-retardant, fire-resistant cable according to claim 1, characterized in that: The electromagnetic shielding sleeve (4) is made of conductive polymer.

6. The oxygen-insulated, flame-retardant, fire-resistant cable according to claim 1, characterized in that: The material of the fire-resistant layer (601) is ceramic silicone rubber.

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