Metal sheath mineral insulation fireproof cable

Abstract

The utility model relates to the technical field of cables, in particular to a metal sheath mineral insulated fireproof cable, which comprises three wire core bodies, a protection structure is arranged on the surface of each wire core body and comprises protection rings, the protection rings are sleeved on the wire core bodies, the number of the wire core bodies and the number of the protection rings are both three, and the protection rings are arranged on the surface of each wire core body. The three wire core bodies and the protection rings are arranged in a circumferential array, an elastic piece is fixedly connected between every two adjacent protection rings, a protection structure is arranged on the outer side of each protection ring and comprises a protection layer, the protection layers are arranged on the protection rings in a sleeving mode, and a heat conduction layer is arranged on the side, away from the protection rings, of each protection layer. A shielding layer is arranged on the side, away from the protection layer, of the heat conduction layer. According to the technical scheme of the utility model, the impact force of the wire core body is effectively absorbed through the elastic member, the protection ring and the filling core, and the elastic member and the protection ring effectively assist the wire core body in resetting, so that the stable use of the cable is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to cable technical field especially relates to a metal sheath mineral insulation fireproof cable. BACKGROUND

[0002] The mineral insulation fireproof cable is a kind of cable with excellent fireproof performance, with the development of society, mineral insulation fireproof cable is put into use in large quantities.

[0003] Prior art such as the utility model with publication number CN220913938U discloses a kind of metal sheath mineral insulation fireproof cable, including surface layer and inner layer, the surface layer includes metal sheath layer, first fireproof layer, waterproof layer and first mineral insulation layer, the metal sheath layer side is fixedly connected with first fireproof layer, the one side of first fireproof layer is fixedly connected with waterproof layer, the one side of waterproof layer is fixedly connected with first mineral insulation layer, the inner layer includes shock attenuation layer, second mineral insulation layer and second fireproof layer, the one side of shock attenuation layer is fixedly connected with second mineral insulation layer, the one side of second mineral insulation layer is fixedly connected with second fireproof layer;The utility model has the following advantages and effects: the insulating layer in the protection cable is not easy to be lost, avoid the cable insulating layer damaged to cause cable cannot be normally used, the high temperature of outside will not affect cable, and, avoid the high temperature generated by the excessive voltage of cable internal conductor, improve the service life of cable.

[0004] At present, most of the metal sheath mineral insulation fireproof cable is deformed by external force during use, which causes the internal core to be extruded and deformed for a long time, and the cable is prone to breakage and short circuit, which has certain safety hazards. UTILITY MODEL CONTENTS

[0005] The utility model aims at solving the shortcomings that most of the metal sheath mineral insulation fireproof cable is deformed by external force during use, which causes the internal core to be extruded and deformed for a long time, and the cable is prone to breakage and short circuit, which has certain safety hazards, and provides a kind of metal sheath mineral insulation fireproof cable.

[0006] In order to achieve the above object, the utility model discloses the following technical scheme: a kind of metal sheath mineral insulation fireproof cable, the surface of the wire core body is provided with protective structure, the protective structure includes protective ring, the protective ring is sleeved on wire core body, the number of wire core body and protective ring is three, three wire core body and protective ring are in circumferential array between, two adjacent protective rings are fixedly connected with elastic member between, the outside of protective ring is provided with protective structure, and the present scheme is effectively absorbed by elastic member, protective ring and filling core The impact force of wire core body, while effectively assisting wire core body to reset by elastic member and protective ring, ensure the stable use of cable.

[0007] Preferably, the protective structure includes a protective layer, the protective layer is sleeved on the protective ring, the side of the protective layer away from the protective ring is provided with a heat-conducting layer, the side of the heat-conducting layer away from the protective layer is provided with a shielding layer, and the side of the shielding layer away from the heat-conducting layer is provided with a metal sheath layer. The metal sheath layer as the outermost protective structure has high strength, corrosion resistance and other characteristics, providing a solid shell protection for the internal wire core, protective ring and other protective structures. The shielding layer can effectively shield external electromagnetic interference, prevent external electromagnetic field from interfering with the transmission of the wire core signal, and also avoid the influence of the electromagnetic field generated by the wire core on external electronic equipment, ensuring the accuracy and stability of signal transmission. The heat-conducting layer can quickly conduct the heat generated by the wire core during operation, avoiding the accumulation of heat inside the cable, which can cause the temperature of the wire core to be too high, thereby ensuring the normal working temperature range of the wire core, prolonging the service life of the wire core and maintaining its electrical performance stability. The protective layer is in direct contact with the protective ring and serves as the innermost protective structure, which has insulation, waterproof, moisture-proof and other functions.

[0008] Preferably, the elastic member is arc-shaped, and the elastic member absorbs and disperses energy through its own deformation, ensuring that the wire core body is not affected by excessive impact force. Meanwhile, the filling core further fills the gap between the protective rings, enhancing the overall buffering effect and absorbing fine vibrations to maintain a stable working environment for the wire core.

[0009] Preferably, the number of elastic members is three, and the three elastic members are arranged in a circumferential array, facilitating the stable use of the cable.

[0010] Preferably, a filling core is arranged between the elastic member and the protective ring.

[0011] Preferably, the filling core is made of rubber casting, which can effectively absorb the deformation force of the elastic member.

[0012] Preferably, the protective ring is a hollow circular tube with a circular cross-section. The protective ring is fitted onto the core body to provide direct physical protection for the core, preventing it from being directly subjected to external impact, wear, or other physical damage. The arc-shaped elastic element connecting adjacent protective rings plays a buffering role, preventing damage when the cable is subjected to external pressure, vibration, or other mechanical forces.

[0013] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0014] 1. In this utility model, the protective ring is sleeved on the core body, providing direct physical protection for the core and preventing it from being directly subjected to external impact, wear, or other physical damage. The arc-shaped elastic element connecting adjacent protective rings plays a buffering role. When the cable is subjected to external compression, vibration, or other mechanical forces, the elastic element absorbs and disperses energy through its own deformation, ensuring that the core body is not affected by excessive impact. At the same time, the filler core further fills the gaps between the protective rings, enhancing the overall buffering effect, absorbing minor vibrations, and maintaining a stable working environment for the core. The metal sheath protective layer, as the outermost protective structure, has high strength and corrosion resistance, providing a robust outer shell protection for the internal core, protective rings, and other protective structures. The shielding layer can effectively... The shielding layer protects against external electromagnetic interference, preventing external electromagnetic fields from interfering with the signal transmission of the conductor. It also prevents the electromagnetic fields generated by the conductor itself from affecting external electronic devices, ensuring the accuracy and stability of signal transmission. The heat-conducting layer quickly conducts heat generated during conductor operation, preventing heat buildup inside the cable and thus ensuring the conductor's normal operating temperature range, extending its lifespan and maintaining stable electrical performance. The protective layer, in direct contact with the protective ring, serves as the innermost protective structure, providing insulation, waterproofing, and moisture resistance. This design effectively absorbs the impact force on the conductor body through elastic elements, the protective ring, and the filler core. Simultaneously, the elastic elements and protective ring effectively assist the conductor body in resetting, ensuring stable cable operation. Attached Figure Description

[0015] Figure 1 A three-dimensional structural diagram of a metal-sheathed mineral-insulated fireproof cable is provided for this utility model.

[0016] Figure 2 This utility model provides a schematic diagram of the internal structure of a metal-sheathed mineral-insulated fireproof cable;

[0017] Figure 3 This utility model proposes a metal-sheathed mineral-insulated fireproof cable. Figure 2 A schematic diagram of the structure at point A;

[0018] Figure 4This utility model provides a cross-sectional structural diagram of a metal-sheathed mineral-insulated fireproof cable.

[0019] Legend:

[0020] 1. Protective structure; 11. Metal sheath layer; 12. Shielding layer; 13. Thermal conductive layer; 14. Protective layer; 2. Core body; 3. Protective structure; 31. Protective ring; 32. Elastic element; 33. Filler core. Detailed Implementation

[0021] Please see Figures 1-4 This utility model provides a technical solution: a metal-sheathed mineral-insulated fireproof cable, including a core body 2, a protective structure 3 on the surface of the core body 2, the protective structure 3 including a protective ring 31, the protective ring 31 being sleeved on the core body 2, and three core bodies 2 and three protective rings 31 arranged in a circular array, with an elastic element 32 fixedly connected between two adjacent protective rings 31, and a protective structure 1 provided on the outer side of the protective ring 31. This solution effectively absorbs the impact force of the core body 2 through the elastic element 32, the protective ring 31 and the filling core 33, and at the same time effectively assists the core body 2 in resetting through the elastic element 32 and the protective ring 31, ensuring the stable use of the cable.

[0022] In this embodiment: the protective structure 1 includes a protective layer 14, which is sleeved on the protective ring 31. A heat-conducting layer 13 is provided on the side of the protective layer 14 away from the protective ring 31. A shielding layer 12 is provided on the side of the heat-conducting layer 13 away from the protective layer 14. A metal sheath layer 11 is provided on the side of the shielding layer 12 away from the heat-conducting layer 13. The metal sheath layer, as the outermost protective structure 1, has high strength and corrosion resistance, providing a robust outer shell protection for the internal wire core, the protective ring 31, and other protective structures 1. The shielding layer 12 can effectively shield external electromagnetic interference. The heat-conducting layer 13 can quickly conduct away the heat generated by the wire core during operation, preventing heat from accumulating inside the cable and causing the wire core temperature to become too high. This ensures the normal operating temperature range of the wire core, extends the service life of the wire core, and maintains its stable electrical performance. The protective layer 14 is in direct contact with the protective ring 31. As the innermost protective structure 1, it has functions such as insulation, waterproofing, and moisture resistance.

[0023] In this embodiment: the elastic element 32 is arc-shaped. The elastic element 32 absorbs and disperses energy through its own deformation, ensuring that the core body 2 is not affected by excessive impact force. At the same time, the filler core 33 further fills the gap between the protective rings 31, enhancing the overall buffering effect, absorbing minor vibrations, and maintaining a stable working environment for the core.

[0024] Specifically, there are three elastic elements 32 arranged in a circular array to facilitate stable use of the cable.

[0025] Specifically, a filler core 33 is provided between the elastic element 32 and the protective ring 31.

[0026] Specifically, the filling core 33 is made of rubber casting, which facilitates the absorption of the force of the deformation of the elastic element 32.

[0027] Specifically, the protective ring 31 is a hollow circular tube with a circular cross-section. The protective ring 31 is fitted onto the core body 2 to provide direct physical protection for the core, preventing the core from being directly subjected to external impact, wear or other physical damage. The arc-shaped elastic element 32 connecting adjacent protective rings 31 plays a buffering role when the cable is subjected to external pressure, vibration or other mechanical forces.

[0028] Working principle: The protective ring 31 is fitted onto the core body 2, providing direct physical protection for the core and preventing it from being directly impacted, worn, or otherwise physically damaged by external forces. The arc-shaped elastic element 32 connecting adjacent protective rings 31 plays a buffering role. When the cable is subjected to external compression, vibration, or other mechanical forces, the elastic element 32 absorbs and disperses energy through its own deformation, ensuring that the core body 2 is not affected by excessive impact. At the same time, the filler core 33 further fills the gaps between the protective rings 31, enhancing the overall buffering effect, absorbing minor vibrations, and maintaining a stable working environment for the core. The metal sheath protective layer, as the outermost protective structure 1, has high strength and corrosion resistance, providing a robust outer shell protection for the internal core, protective rings 31, and other protective structures 1. The shielding layer 12 can effectively shield... External electromagnetic interference is prevented from interfering with the signal transmission of the wire core, and the electromagnetic field generated by the wire core itself is also prevented from affecting external electronic equipment, ensuring the accuracy and stability of signal transmission. The heat-conducting layer 13 can quickly conduct away the heat generated by the wire core during operation, preventing heat from accumulating inside the cable and causing the wire core temperature to become too high, thereby ensuring the normal operating temperature range of the wire core, extending the service life of the wire core and maintaining its stable electrical performance. The protective layer 14 is in direct contact with the protective ring 31. As the innermost protective structure 1, it has functions such as insulation, waterproofing, and moisture resistance. This solution effectively absorbs the impact force of the wire core body 2 through the elastic element 32, the protective ring 31, and the filling core 33. At the same time, the elastic element 32 and the protective ring 31 effectively assist the wire core body 2 in resetting, ensuring the stable use of the cable.

Claims

1. A metal-sheathed mineral-insulated fire-resistant cable, comprising a conductor body (2), characterized in that: The surface of the core body (2) is provided with a protective structure (3), the protective structure (3) includes a protective ring (31), the protective ring (31) is sleeved on the core body (2), the number of the core body (2) and the protective ring (31) are three, the three core bodies (2) and the protective ring (31) are arranged in a circular array, and an elastic element (32) is fixedly connected between two adjacent protective rings (31), and a protective structure (1) is provided on the outside of the protective ring (31).

2. The metal-sheathed mineral-insulated fire-resistant cable according to claim 1, characterized in that: The protective structure (1) includes a protective layer (14), which is sleeved on the protective ring (31). A heat-conducting layer (13) is provided on the side of the protective layer (14) away from the protective ring (31). A shielding layer (12) is provided on the side of the heat-conducting layer (13) away from the protective layer (14). A metal sheath layer (11) is provided on the side of the shielding layer (12) away from the heat-conducting layer (13).

3. The metal-sheathed mineral-insulated fire-resistant cable according to claim 1, characterized in that: The elastic element (32) is arc-shaped.

4. The metal-sheathed mineral-insulated fire-resistant cable according to claim 1, characterized in that: The number of elastic elements (32) is three, and the three elastic elements (32) are arranged in a circular array.

5. A metal-sheathed mineral-insulated fire-resistant cable according to claim 1, characterized in that: A filler core (33) is provided between the elastic element (32) and the protective ring (31).

6. A metal-sheathed mineral-insulated fire-resistant cable according to claim 5, characterized in that: The filling core (33) is made of rubber casting.

7. The metal-sheathed mineral-insulated fire-resistant cable according to claim 1, characterized in that: The protective ring (31) is a hollow circular tube, and the cross-section of the protective ring (31) is circular.

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