CN220962842U

CN220962842U - Fireproof variable frequency cable

Info

Publication number: CN220962842U
Application number: CN202323028853.XU
Authority: CN
Inventors: 李镇江; 商宇; 唐国强; 崔震
Original assignee: Hunan Valin Wire and Cable Co Ltd
Current assignee: Hunan Valin Wire and Cable Co Ltd
Priority date: 2023-11-09
Filing date: 2023-11-09
Publication date: 2024-05-14
Anticipated expiration: 2033-11-09

Abstract

The utility model discloses a fireproof variable frequency cable, which belongs to the technical field of wires and cables and comprises a first shielding layer, a fireproof layer, a sheath layer, a second shielding layer, an isolation layer and a cable core from outside to inside in sequence; the cable core is formed by twisting a plurality of wire cores; the wire core sequentially comprises a third shielding layer, an insulating layer and a conductor from outside to inside; the fireproof layer sequentially comprises a first glass fiber layer, an asbestos net cloth layer and a second glass fiber layer from outside to inside; and the surfaces of the first glass fiber layer and the second glass fiber layer, which are far away from the asbestos gauze layer, are coated with organic silicon layers. The utility model has a unique fireproof structure, and the organic silicon layer and the fireproof layer are matched for use, so that the cable can normally work in flame combustion at 500 ℃ and has enough fireproof capability.

Description

Fireproof variable frequency cable

Technical Field

The utility model belongs to the technical field of wires and cables, and particularly relates to a fireproof variable frequency cable.

Background

Along with the large number of applications of variable frequency motors, the variable frequency cables are increasingly required by connecting wires matched with the variable frequency motors, the variable frequency cables are applied to variable frequency speed regulating systems with the operating frequency of 30-300 Hz, and the large variable frequency cables in the market are all improved by power cables and have no other functions except the application to the variable frequency speed regulating systems. When the use environment fires, the cable is easy to damage, the cable damage can lead to the sudden power failure of the variable frequency motor and the variable frequency power supply to stop, residual mechanical energy impacts, and the variable frequency motor and the variable frequency power supply can be damaged.

Disclosure of utility model

The utility model aims to provide a fireproof variable frequency cable which is used for solving at least one aspect of the technical problems in the background art.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the fireproof variable frequency cable comprises a first shielding layer, a fireproof layer, a sheath layer, a second shielding layer, an isolation layer and a cable core from outside to inside in sequence;

the cable core is formed by twisting a plurality of wire cores;

the wire core sequentially comprises a third shielding layer, an insulating layer and a conductor from outside to inside;

the fireproof layer sequentially comprises a first glass fiber layer, an asbestos net cloth layer and a second glass fiber layer from outside to inside;

and the surfaces of the first glass fiber layer and the second glass fiber layer, which are far away from the asbestos gauze layer, are coated with organic silicon layers.

Further, the organic silicon layer is an SAR-2 organic silicon paint layer.

Further, the first shielding layer is formed by weaving nickel-plated copper wires.

Further, the sheath layer is at least one of a ceramic silicon rubber layer or a fluoroplastic layer.

Further, the second shielding layer is a copper tape layer.

Further, the isolation layer is a glass fiber tape layer or a high flame retardant tape layer.

Further, the third shielding layer is formed by braiding copper wires.

Further, the insulating layer is a ceramic silicone rubber layer.

Further, the conductor is one of a first type of conductor and a second type of conductor according to the required section size.

Further, the fireproof layer structure is formed by wrapping two layers of glass fiber with one layer of asbestos mesh cloth, and the glass fiber has good insulativity, strong heat resistance, good corrosion resistance, high mechanical strength, but brittle property and poor wear resistance; the asbestos mesh cloth has light weight, high temperature resistance, heat resistance, chemical corrosion resistance and acid resistance; the asbestos mesh cloth is wrapped by glass fiber, so that the defect of poor wear resistance of the glass fiber can be overcome while the fireproof performance is enhanced.

Furthermore, the fire-resistant layer is matched with the organic silicon layer, and the SAR-2 organic silicon paint used by the utility model has strong weather resistance, strong adhesive force, good corrosion resistance and strong high-temperature stability, and is combined with the fire-resistant layer to ensure that the cable normally works in flame combustion at 500 ℃ and has enough fire resistance.

Furthermore, after the SAR-2 organosilicon paint is coated, the solvent is volatilized at 150 ℃, then solidified at 220 ℃, cooled and then subjected to the next working procedure.

Compared with the prior art, the utility model has the beneficial effects that:

1. The outer shielding layer is made of nickel-plated copper wires, so that the shielding performance is ensured, and meanwhile, the shielding layer is oxidation-resistant and high-temperature-resistant.

2. The cable sheath has a unique fireproof structure, two layers of glass filaments are woven outside the cable sheath and coated with organosilicon paint, and a layer of asbestos mesh cloth is further wrapped between the two layers of glass filaments, so that the fireproof capability is further enhanced.

3. The SAR-2 organosilicon paint is matched with the fireproof layer, so that the cable can normally work in flame combustion at 500 ℃ and has enough fireproof capability.

4. The sheath layer is made of ceramic silicon rubber, fluoroplastic and other temperature-resistant materials so as to bear heat energy generated by the external structure when resisting flame combustion.

5. The third shielding layer uses a copper belt to enhance shielding performance, and a glass fiber belt isolation layer is arranged below the copper belt, so that the glass fiber belt can isolate the inner shielding of the cable from the copper belt, and a certain insulating capability is achieved.

6. Each wire core is externally provided with a layer of copper wire braided shield, so that the shielding effect is achieved, the shielding effect can be achieved, meanwhile, the occupation of the ground wire core to the space is avoided, and the overall outer diameter is reduced.

Drawings

The present utility model is further described below with reference to the accompanying drawings for the convenience of understanding by those skilled in the art.

FIG. 1 is a cross-sectional view of the present utility model;

FIG. 2 is a cross-sectional view of a flame retardant layer of the present utility model;

in the figure: 100. a conductor; 110. an insulating layer; 120. a third shielding layer; 130. an isolation layer; 140. a second shielding layer; 150. a sheath layer; 160. a fire-blocking layer; 170. a first shielding layer; 200. an organosilicon layer; 210. a first glass fiber layer; 220. an asbestos cloth layer; 230. and a second glass fiber layer.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the particular embodiments described herein are illustrative only and are not intended to limit the utility model, i.e., the embodiments described are merely some, but not all, of the embodiments of the utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present utility model.

The utility model is limited only by the claims and the full scope and equivalents thereof, and furthermore, the terms "first", "second", and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second" may include at least one such feature, either explicitly or implicitly. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Referring to fig. 1 to fig. 2, in an embodiment of the present utility model, a fireproof variable frequency cable sequentially includes, from outside to inside, a first shielding layer 170, a fireproof layer 160, a sheath layer 150, a second shielding layer 140, an isolation layer 130 and a cable core;

The cable core is formed by twisting three wire cores;

The wire core sequentially comprises a third shielding layer 120, an insulating layer 110 and a conductor 100 from outside to inside;

the fireproof layer 160 sequentially comprises a first glass fiber layer 210, a asbestos mesh cloth layer 220 and a second glass fiber layer 230 from outside to inside;

The surface of both the first and second glass fibre layers 210, 230 remote from the asbestos cloth layer 220 is coated with a silicone layer 200.

Further, the silicone layer 200 is a SAR-2 silicone paint layer.

Further, the first shielding layer 170 is woven from nickel-plated copper wires.

Further, the sheath layer 150 is at least one of a ceramic silicone rubber layer or a fluoroplastic layer.

Further, the second shielding layer 140 is a copper tape layer.

Further, the isolation layer 130 is a glass fiber tape layer or a high flame retardant tape layer.

Further, the third shielding layer 120 is woven from copper wires.

Further, the insulating layer 110 is a ceramic silicone rubber layer.

Further, the conductor 100 is one of the first type of conductor and the second type of conductor according to the required section size.

Further, the first type of conductor is a solid conductor, and the second type of conductor is a stranded conductor, in this embodiment a stranded copper wire.

Furthermore, the first shielding layer is formed by weaving nickel-plated copper wires, has excellent corrosion resistance and excellent conductivity, ensures the shielding performance and can resist oxidation and high temperature.

Furthermore, the sheath layer of the utility model adopts ceramic silicon rubber, fluoroplastic and other temperature-resistant materials so as to bear heat energy generated by the external structure when resisting flame combustion.

Furthermore, the fireproof layer structure is formed by wrapping two layers of glass fiber with one layer of asbestos mesh cloth, and the glass fiber has good insulativity, strong heat resistance, good corrosion resistance, high mechanical strength, but brittle property and poor wear resistance; the asbestos mesh cloth has light weight, high temperature resistance, heat resistance, chemical corrosion resistance and acid resistance; the asbestos mesh cloth is wrapped by glass fiber, so that the defect of poor wear resistance of the glass fiber can be overcome while the fireproof performance is enhanced.

Furthermore, the fire-proof layer and the organic silicon layer are matched for use, and the SAR-2 organic silicon paint used by the utility model has strong weather resistance, strong adhesive force, good corrosion resistance and strong high-temperature stability, and combines with the fire-proof layer to ensure that the cable normally works in flame combustion at 500 ℃ and has enough fire-proof capability.

Furthermore, the second shielding layer of the utility model uses the copper strip to enhance the shielding performance, the isolation layer under the copper strip is a glass fiber strip, and the glass fiber strip has good heat resistance stability and impact resistance, can isolate the inner shielding of the cable from the copper strip, and has certain insulating capability.

Furthermore, the insulating layer material is ceramic silicon rubber, so that the insulating layer material has good heat resistance, wide use temperature range and good corrosion resistance.

The foregoing is merely illustrative of the structures of this utility model and various modifications, additions and substitutions for those skilled in the art can be made to the described embodiments without departing from the scope of the utility model or from the scope of the utility model as defined in the accompanying claims.

Claims

1. The fireproof variable frequency cable is characterized by sequentially comprising a first shielding layer (170), a fireproof layer (160), a sheath layer (150), a second shielding layer (140), an isolation layer (130) and a cable core from outside to inside;

the cable core is formed by twisting a plurality of wire cores;

the wire core sequentially comprises a third shielding layer (120), an insulating layer (110) and a conductor (100) from outside to inside;

The fireproof layer (160) comprises a first glass fiber layer (210), an asbestos mesh cloth layer (220) and a second glass fiber layer (230) from outside to inside in sequence;

The surfaces of the first glass fiber layer (210) and the second glass fiber layer (230) far away from the asbestos cloth layer (220) are coated with an organic silicon layer (200).

2. A fire resistant frequency conversion cable according to claim 1, characterized in that the silicone layer (200) is a SAR-2 silicone paint layer.

3. A fire resistant variable frequency cable according to claim 1, characterized in that the first shielding layer (170) is woven from nickel plated copper wires.

4. A fire resistant power conversion cable according to claim 1, wherein the sheath layer (150) is at least one of a layer of ceramic silicone rubber or a layer of fluoroplastic.

5. A fire resistant variable frequency cable according to claim 1, characterized in that the second shielding layer (140) is a copper strip layer.

6. The fire-resistant variable frequency cable according to claim 1, characterized in that the isolating layer (130) is a glass-fibre tape layer or a high flame-retardant tape layer.

7. A fire resistant variable frequency cable according to claim 1, characterized in that the third shielding layer (120) is braided from copper wires.

8. A fire resistant power conversion cable according to claim 1, characterized in that the insulating layer (110) is a layer of ceramic silicone rubber.

9. A fire resistant variable frequency cable according to claim 1, characterized in that the conductor (100) is one of the first type of conductor and the second type of conductor according to the required cross-sectional size.