A high flame retardant jacketed cable

Abstract

The utility model relates to cable technical field discloses a kind of high flame-retardant sheath cables, including cable main body, the tensile structure is arranged on the cable main body, the auxiliary mechanism is arranged on the tensile structure, the tensile structure includes insulating layer, the insulating layer is attached and connected in the side surface outer wall of cable main body, the insulating layer is attached and connected with tensile layer on the side outer wall of one side away from cable main body, the inner circle inner wall of tensile layer is fixedly connected with reinforcing steel wire, the side surface outer wall of tensile layer is attached and connected with reinforcing steel wire, the side surface outer wall of tensile layer is attached and connected with composite fiber yarn layer, the side outer wall of composite fiber yarn layer away from tensile layer is attached and connected with flame-retardant layer.In the utility model, the material of reinforcing steel wire is galvanized steel wire, which has high tensile strength, so that the flame-retardant layer continues to support and resist tension after burning and dissolving, preventing the cable from being easily damaged by its own tension.

Description

Technical Field

[0001] This utility model relates to the field of cable technology, and in particular to a high flame-retardant sheathed cable. Background Technology

[0002] Currently, with the rapid development of the national economy, cables are widely used in various power stations, such as nuclear power plants, thermal power plants, as well as subway stations, power plants, high-rise buildings, military facilities, oil platforms and other fields. Therefore, people have increasingly higher requirements for the quality and function of cables.

[0003] A search revealed Chinese Patent Publication No. CN217880942U, which discloses a high flame-retardant elastomer sheathed cable, relating to the field of cable technology. This invention solves the technical problems of poor cable performance in the event of an accident, inability to withstand high-intensity compression, and poor overall flexibility under high-intensity tension. The invention utilizes a tensile-resistant layer formed by interweaving mixed reinforcing fibers one and two to create a composite fiber yarn layer one, thereby increasing the overall strength of the composite fiber yarn layer one. Simultaneously, the interweaving of composite fiber yarn layers one, two, and three forms a tensile-resistant layer, enhancing the overall flexibility of the cable and further improving its overall compressive strength.

[0004] The above-mentioned device has the following defects: the optical cable forms a tensile layer through composite fiber yarn layer one, composite fiber yarn layer two, and composite fiber yarn layer three. This structural design is relatively simple. In a fire, when the fire is large and the fire lasts for a long time, the composite fiber yarn layer is burned and damaged, causing its performance to fail and the cable to be easily broken. Therefore, a high flame-retardant sheathed cable is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above deficiencies, this utility model provides a high flame-retardant sheathed cable, which aims to improve the problem in the prior art where the composite fiber yarn layer is damaged by combustion and loses its performance when the fire is large and the fire lasts for a long time, resulting in the cable being easily broken.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a high flame-retardant sheathed cable, comprising a cable body, a tensile structure provided on the cable body, an auxiliary mechanism provided on the tensile structure, the tensile structure comprising an insulation layer, the insulation layer being attached to the outer side wall of the cable body, a tensile layer being attached to the outer side wall of the insulation layer away from the cable body, a reinforcing steel wire being fixedly connected to the inner wall of the inner ring of the tensile layer, a reinforcing steel wire being attached to the outer side wall of the tensile layer, a composite fiber yarn layer being attached to the outer side wall of the tensile layer, a flame-retardant layer being attached to the outer side wall of the composite fiber yarn layer away from the tensile layer, and a wear-resistant layer being attached to the outer side wall of the flame-retardant layer away from the composite fiber yarn layer.

[0007] As a further description of the above technical solution: the auxiliary mechanism includes a hanging frame, which is attached to the outer side wall of the wear-resistant layer. An upper plate is fixedly connected to the outer right side wall of the hanging frame, and a lower plate is fixedly connected to the outer right side wall of the hanging frame. A buckle plate is fixedly connected to the bottom outer wall of the upper plate, and a fixing hole is provided on the top inner wall of the upper plate.

[0008] As a further description of the above technical solution: the thickness of the insulating layer is three millimeters, and the thickness of the tensile layer is three millimeters.

[0009] As a further description of the above technical solution: there are a total of several reinforcing steel wires, and the several reinforcing steel wires are intertwined in groups of four, and the four reinforcing steel wires are bundled together and attached to the inner wall of the inner ring of a tensile layer.

[0010] As a further description of the above technical solution: the thickness of the composite fiber yarn layer is four millimeters, the thickness of the flame retardant layer is five millimeters, and the thickness of the wear-resistant layer is four millimeters.

[0011] As a further description of the above technical solution: there are three buckle plates, and the three buckle plates are snapped onto the bottom outer wall of the buckle opening.

[0012] As a further description of the above technical solution: the fixing hole penetrates the bottom inner wall of the lower plate, and the side outer wall of the buckle plate is fixedly connected with a solvent-resistant layer.

[0013] This utility model has the following beneficial effects:

[0014] 1. In this utility model, the tensile layer is made of Kevlar fiber, which has excellent tensile properties such as high strength, high modulus, high temperature resistance, and corrosion resistance. The reinforcing steel wire is made of galvanized steel wire, which has high tensile strength and good stability. After the flame retardant layer melts, the reinforcing steel wire continues to provide auxiliary support for the cable body and prevent the cable from being easily broken and damaged by relying solely on itself. The flame retardant layer is made of mineral insulation sheath, which is composed of magnesium oxide and copper sheath. It can withstand high temperature without damage and does not produce toxic gases or smoke when burning.

[0015] 2. In this utility model, the hanging frame is made of stainless steel, mostly the grade of stainless steel used in construction applications, such as 304 and 316. It has good long-term oxidation resistance at temperatures exceeding 800°C and only begins to melt at temperatures exceeding 1375°C. At the same time, the anti-solution layer is refractory mortar, a mixture of various compounds and adhesives, which can be used for construction and repair in various high-temperature environments. This prevents the hanging frame supporting the cable from melting during a fire, which would cause the cable to lose support and fall and be damaged. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall front view of a high flame-retardant sheathed cable proposed in this utility model;

[0017] Figure 2 This is a schematic diagram of the tensile structure of a high flame-retardant sheathed cable proposed in this utility model;

[0018] Figure 3 This is a schematic diagram of the tensile structure of a high flame-retardant sheathed cable proposed in this utility model;

[0019] Figure 4 This is a schematic diagram of the auxiliary mechanism of a high flame-retardant sheathed cable proposed in this utility model.

[0020] Legend:

[0021] 1. Cable body; 2. Tensile structure; 21. Insulation layer; 22. Tensile layer; 23. Reinforcing steel wire; 24. Composite fiber yarn layer; 25. Flame retardant layer; 26. Wear-resistant layer; 3. Auxiliary mechanism; 31. Hanger; 32. Upper plate; 33. Lower plate; 34. Clip plate; 35. Bayonet; 36. Fixing hole. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Reference Figures 1-3 This utility model provides an embodiment of a high flame-retardant sheathed cable, comprising a cable body 1, a tensile structure 2 on the cable body 1, and an auxiliary mechanism 3 on the tensile structure 2. The tensile structure 2 includes an insulation layer 21, which is attached to the outer side wall of the cable body 1. The insulation layer 21 is made of natural rubber and synthetic rubber, providing a certain insulation effect while also possessing elasticity and flexibility, suitable for cables that need to be bent or moved. A tensile layer 22 is attached to the outer side of the insulation layer 21 away from the cable body 1. The tensile layer 22 is made of Kevlar fiber, possessing excellent tensile properties such as high strength, high modulus, high temperature resistance, and corrosion resistance. A reinforcing steel wire 23 is fixedly connected to the inner wall of the inner ring of the tensile layer 22. The outer wall is bonded with reinforcing steel wires 23. The outer wall of the tensile layer 22 is bonded with a composite fiber yarn layer 24. The outer wall of the composite fiber yarn layer 24 away from the tensile layer 22 is bonded with a flame-retardant layer 25. The flame-retardant layer 25 is made of mineral insulating sheath, composed of magnesium oxide and copper sheath, which can withstand high temperature without damage and does not produce toxic gases or smoke when burning. The outer wall of the flame-retardant layer 25 away from the composite fiber yarn layer 24 is bonded with a wear-resistant layer 26. The wear-resistant layer 26 is made of ethylene propylene rubber, with a working temperature of -40 to +125℃. It is a saturated non-polar material with high chemical resistance, low temperature resistance, ozone resistance, aging resistance, oil resistance, and thermal stability. It also has good water resistance, hot water steam resistance, and electrical insulation properties.

[0024] Reference Figures 2-4The insulation layer 21 is three millimeters thick, the tensile layer 22 is three millimeters thick, and there are several reinforcing steel wires 23, which are wrapped together in groups of four. The reinforcing steel wires 23 are made of galvanized steel wire, which has high tensile strength and good stability, making it suitable for use in harsh environments, such as resisting wind, rain, sun, and corrosion. The reinforcing steel wires 23 are bundled in groups of four and bonded to the inner wall of the tensile layer 22. There are several reinforcing steel wires 23, which are wrapped together in groups of four. A bundle is bonded to the inner wall of the tensile layer 22. The composite fiber yarn layer 24 is four millimeters thick. The composite fiber yarn layer 24 refers to a yarn layer composed of composite fibers. Composite fibers are made by feeding two or more polymer melts or solutions into the same spinning assembly, where they converge at appropriate locations and are spun into a single fiber through a spinneret. The fiber contains two or more immiscible polymers on the cross-section of the same fiber, resulting in a unique structure and properties. The flame retardant layer 25 is five millimeters thick, and the wear-resistant layer 26 is four millimeters thick.

[0025] Reference Figures 3-4 The auxiliary mechanism 3 includes a hanging bracket 31, which is attached to the outer side wall of the anti-alcohol layer. The hanging bracket 31 is made of stainless steel, primarily the grade of stainless steel used in construction applications, such as 304 and 316. This stainless steel exhibits good long-term oxidation resistance at temperatures exceeding 800°C and only begins to melt at temperatures exceeding 1375°C. The anti-alcohol layer is made of refractory mortar, a mixture of various compounds and adhesives, suitable for construction and repair in various high-temperature environments. An upper plate 32 is fixedly connected to the outer right side wall of the hanging bracket 31. The lower plate 33 is fixedly connected, and the bottom outer wall of the upper plate 32 is fixedly connected with a buckle plate 34. By setting the buckle plate 34 and the bayonet 35 to engage with each other, the hanging bracket 31 is tightened to a certain extent. The top inner wall of the upper plate 32 has a fixing hole 36. There are three buckle plates 34 in total. The three buckle plates 34 are engaged with the bottom outer wall of the bayonet 35. The fixing hole 36 penetrates the bottom inner wall of the lower plate 33. The side outer wall of the buckle plate 34 is fixedly connected with a solvent-resistant layer. The solvent-resistant layer is made of refractory fiber, which is made of high-temperature alumina and silicate materials. It is mainly used for high-temperature heat insulation and provides a certain degree of heat insulation protection.

[0026] Working Principle: The insulation layer 21, made of natural and synthetic rubber, provides insulation while also offering elasticity and flexibility, making it suitable for cables requiring bending or movement. The tensile layer 22, made of Kevlar fiber, boasts excellent tensile properties, including high strength, high modulus, high temperature resistance, and corrosion resistance. The flame-retardant layer 25, a mineral insulating sheath composed of magnesium oxide and copper, withstands high temperatures without damage and produces no toxic gases or fumes during combustion. The wear-resistant layer 26, made of ethylene propylene rubber, operates at temperatures between -40°C and +125°C and is a saturated non-polar material. It has high resistance to chemicals, low temperatures, ozone, aging, oil, and heat stability. It also has good water resistance, hot water steam resistance, and electrical insulation properties. The hanging bracket 31 is made of stainless steel, mostly the stainless steel grades used in building applications, such as 304 and 316. It has good long-term oxidation resistance at temperatures exceeding 800°C and only begins to melt at temperatures exceeding 1375°C. At the same time, the anti-melting layer is refractory mortar, a mixture of various compounds and adhesives, which can be used for construction and repair in various high-temperature environments to prevent the hanging bracket 31 from melting and causing the cable body 1 to fall to the outside.

[0027] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high flame-retardant sheathed cable, comprising a cable body (1), characterized in that: The cable body (1) is provided with a tensile structure (2), and the tensile structure (2) is provided with an auxiliary mechanism (3); The tensile structure (2) includes an insulation layer (21), which is attached to the outer side wall of the cable body (1). A tensile layer (22) is attached to the outer side wall of the insulation layer (21) away from the cable body (1). A reinforcing steel wire (23) is fixedly connected to the inner wall of the inner ring of the tensile layer (22). A reinforcing steel wire (23) is attached to the outer side wall of the tensile layer (22). A composite fiber yarn layer (24) is attached to the outer side wall of the composite fiber yarn layer (24) away from the tensile layer (22). A flame-retardant layer (25) is attached to the outer side wall of the composite fiber yarn layer (24) away from the tensile layer (22). A wear-resistant layer (26) is attached to the outer side wall of the flame-retardant layer (25) away from the composite fiber yarn layer (24).

2. The high flame-retardant sheathed cable according to claim 1, characterized in that: The auxiliary mechanism (3) includes a hanging bracket (31), which is attached to the outer side wall of the wear-resistant layer (26). An upper plate (32) is fixedly connected to the right outer wall of the hanging bracket (31), and a lower plate (33) is fixedly connected to the right outer wall of the hanging bracket (31). A buckle plate (34) is fixedly connected to the bottom outer wall of the upper plate (32), and a fixing hole (36) is provided on the top inner wall of the upper plate (32).

3. The high flame-retardant sheathed cable according to claim 1, characterized in that: The insulation layer (21) has a thickness of three millimeters, and the tensile layer (22) has a thickness of three millimeters.

4. The high flame-retardant sheathed cable according to claim 1, characterized in that: There are several reinforcing steel wires (23), and the several reinforcing steel wires (23) are wrapped together in groups of four, and the four reinforcing steel wires (23) are bundled together and attached to the inner wall of the inner ring of a tensile layer (22).

5. A high flame-retardant sheathed cable according to claim 1, characterized in that: The composite fiber yarn layer (24) has a thickness of four millimeters, the flame retardant layer (25) has a thickness of five millimeters, and the wear-resistant layer (26) has a thickness of four millimeters.

6. A high flame-retardant sheathed cable according to claim 2, characterized in that: There are three buckle plates (34), and the three buckle plates (34) are snapped onto the bottom outer wall of the buckle opening (35).

7. A high flame-retardant sheathed cable according to claim 2, characterized in that: The fixing hole (36) penetrates the bottom inner wall of the lower plate (33), and the side outer wall of the buckle plate (34) is fixedly connected with a solvent-resistant layer.

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