High-performance metal sheath mineral fireproof cable with junction box structure

Abstract

The utility model relates to the technical field of cables, in particular to a high-performance metal sheath mineral fireproof cable with a junction box structure, which comprises a cable main body consisting of a halogen-free low-smoke outer sheath arranged on the outermost layer and a corrugated metal sheath arranged in the halogen-free low-smoke outer sheath. An inorganic mineral insulating layer is arranged in the corrugated metal sheath, an inner insulating layer is arranged in the inorganic mineral insulating layer, a cable core is arranged in the inner insulating layer, a center reinforcing core is arranged in the center of the cable core, and a plurality of loose tubes which are annularly arranged at equal intervals are arranged between the center reinforcing core and the cable core. A conductor core is arranged in the loose tube, a junction box is arranged outside the cable body, inclined threading tubes are fixedly installed on plate bodies on the left side and the right side of the junction box, and the cable body penetrates through the inclined threading tubes. The fireproof cable has good fireproof performance and is beneficial to guaranteeing safety.

Description

Technical Field

[0001] This utility model relates to the field of cable technology, and more specifically, to a high-performance metal-sheathed mineral fireproof cable with a junction box structure. Background Technology

[0002] With the rapid development of modern society, electrical equipment and power lines play an increasingly important role in various industries. Power transmission typically requires cables as the transmission medium. However, fires caused by electrical equipment and lines during cable transmission are frequent, posing a significant threat to people's lives and property. Statistics show that electrical circuit faults are one of the main causes of fires, especially fires caused by cable overheating and short circuits. There are many types of cables on the market, most of which are wrapped with insulation materials, commonly including PVC. However, the external insulation materials of most cables have low combustion temperatures and are flammable, easily failing in a fire and failing to guarantee the reliability of power supply and the safe evacuation of personnel. Therefore, we propose a high-performance metal-sheathed mineral-resistant fire-resistant cable with a junction box structure. Utility Model Content

[0003] The purpose of this invention is to provide a high-performance metal-sheathed mineral fire-resistant cable with a junction box structure to solve the defects mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A high-performance metal-sheathed mineral fire-resistant cable with a junction box structure includes a cable body. The cable body consists of an outermost halogen-free low-smoke outer sheath and a corrugated metal sheath inside the halogen-free low-smoke outer sheath. An inorganic mineral insulation layer is disposed inside the corrugated metal sheath, and an inner insulation layer is disposed inside the inorganic mineral insulation layer. A cable core is disposed inside the inner insulation layer. A central reinforcing core is disposed at the center of the cable core. Multiple loose tubes arranged in a ring at equal intervals are disposed between the central reinforcing core and the cable core. A conductor is disposed inside each loose tube.

[0006] Preferably, a conductor core filling layer is provided between the conductor core and the loose tube, and a cable core filling layer is provided between the loose tube, the central reinforcing core and the cable core.

[0007] Preferably, a junction box is provided on the outside of the cable body, and inclined conduits are fixedly installed on the left and right side plates of the junction box, through which the cable body passes.

[0008] Preferably, the length of the inclined conduit is 10cm to 15cm, and the inclined conduit is inclined downward at 30° to 60°.

[0009] Preferably, a top cover is fixedly installed on the top surface of the junction box, and the lower projection of the top cover coincides with the lower projection of the junction box.

[0010] Preferably, a rectangular groove is provided on the top surface of the junction box, and a sealing gasket is engaged in the rectangular groove.

[0011] Preferably, both the sealing gasket and the rectangular groove are rectangular annular, and the size of the sealing gasket is adapted to the size of the rectangular groove.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. This utility model ensures that no toxic fumes are generated in a fire by setting a halogen-free, low-smoke outer sheath, while protecting the internal structure from the influence of the external environment. The inorganic mineral insulation layer has good insulation and fire resistance. The corrugated metal sheath can increase the flexibility and bending resistance of the cable, thus achieving the effect of fire protection.

[0014] 2. This utility model facilitates the protection of the wiring parts of the cable body through the junction box, and enables the wire threading operation through the inclined conduit, making it convenient to use. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the exploded structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the cable body of this utility model;

[0018] Figure 4 This utility model Figure 3 Enlarged view of point A in the middle;

[0019] The meanings of the labels in the diagram are as follows:

[0020] 1. Cable body; 10. Halogen-free low-smoke outer sheath; 11. Corrugated metal sheath; 12. Inorganic mineral insulation layer; 13. Inner insulation layer; 14. Cable core; 15. Central reinforcing core; 16. Loose tube; 161. Conductor core; 162. Conductor core filling layer; 17. Cable core filling layer; 2. Junction box; 20. Inclined conduit; 21. Rectangular groove; 22. Sealing gasket; 23. Top cover. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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.

[0022] Please see Figures 1-4 This utility model provides a technical solution: a high-performance metal-sheathed mineral fireproof cable with a junction box structure, including a cable body 1. The cable body 1 is composed of an outermost halogen-free low-smoke outer sheath 10 and a corrugated metal sheath 11 inside the halogen-free low-smoke outer sheath 10. The corrugated metal sheath 11 has an inorganic mineral insulation layer 12 inside. The halogen-free low-smoke outer sheath 10 can ensure that no toxic smoke is generated in a fire and protect the internal structure from the influence of the external environment. The inorganic mineral insulation layer 12 can provide good insulation and fire resistance. The corrugated metal sheath 11 can increase the flexibility and bending resistance of the cable, ultimately achieving the effect of fire protection.

[0023] Specifically, an inner insulation layer 13 is provided inside the inorganic mineral insulation layer 12, a cable core 14 is provided inside the inner insulation layer 13, a central reinforcing core 15 is provided at the center of the cable core 14, and a plurality of loose tubes 16 arranged in a ring at equal intervals are provided between the central reinforcing core 15 and the cable core 14. A guide core 161 is provided inside the loose tube 16, so as to realize the insulation and fire protection of the guide core 161 inside.

[0024] In this embodiment, a conductor core filling layer 162 is provided between the conductor core 161 and the loose tube 16, and a cable core filling layer 17 is provided between the loose tube 16, the central reinforcing core 15 and the cable core 14, which serves as a filling and protection effect.

[0025] Specifically, a junction box 2 is provided on the outside of the cable body 1. Inclined conduits 20 are fixedly installed on the left and right side plates of the junction box 2. The cable body 1 passes through the inclined conduits 20 to realize the wiring operation inside the junction box 2, so as to realize the effect of protecting the wiring part inside by using the junction box 2.

[0026] Furthermore, the length of the inclined conduit 20 is 10cm to 15cm, and the inclined conduit 20 is set at a downward inclination of 30° to 60°, so that falling rainwater is not easy to enter the inclined conduit 20.

[0027] In addition, a top cover 23 is fixedly installed on the top surface of the junction box 2, and the lower projection of the top cover 23 coincides with the lower projection of the junction box 2; a rectangular groove 21 is provided on the top surface of the junction box 2, and a sealing gasket 22 is snapped into the rectangular groove 21 to achieve the effect of sealing and protection.

[0028] It is worth noting that both the sealing gasket 22 and the rectangular groove 21 are rectangular rings, and the size of the sealing gasket 22 is matched with the size of the rectangular groove 21, which facilitates stable snap-fit ​​and fixing.

[0029] When using the high-performance metal-sheathed mineral fireproof cable with a junction box structure of this utility model, open the top cover 23, pass the cable body 1 through the inclined conduit 20 from the outside, and then perform the wiring operation of the cable body 1 inside the junction box 2. After the wiring is completed, waterproof glue can be used to seal the inclined conduit 20 and the cable body 1. Finally, the top cover 23 is fixedly installed on the junction box 2 with fastening screws to complete the wiring operation.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A high performance mineral fire resistant cable with a junction box structure comprising a cable body (1), characterized in that: The cable body (1) is composed of a halogen-free low-smoke outer sheath (10) arranged at the outermost layer and a corrugated metal sheath (11) arranged inside the halogen-free low-smoke outer sheath (10), an inorganic mineral insulation layer (12) is arranged inside the corrugated metal sheath (11), an inner insulation layer (13) is arranged inside the inorganic mineral insulation layer (12), a cable core (14) is arranged inside the inner insulation layer (13), a central reinforcing core (15) is arranged at the central position of the cable core (14), a plurality of ring-shaped equidistantly arranged loose tubes (16) are arranged between the central reinforcing core (15) and the cable core (14), and a conductor core (161) is arranged inside the loose tube (16).

2. A high performance mineral fire resistant cable with a terminal box structure according to claim 1, characterized in that: A conductor core filling layer (162) is arranged between the conductor core (161) and the loose tube (16), and a cable core filling layer (17) is arranged between the loose tube (16), the central reinforcing core (15) and the cable core (14).

3. A high performance metal sheathed mineral fire resistant cable with a terminal box construction according to claim 1, characterized in that: An outer part of the cable body (1) is provided with a junction box (2), and an inclined threading pipe (20) is fixedly installed on the left and right side plates of the junction box (2), and the cable body (1) passes through the inclined threading pipe (20).

4. A high performance metal sheathed mineral fire resistant cable with a terminal box construction according to claim 3, characterised in that: The length of the inclined threading pipe (20) is 10-15 cm, and the inclined threading pipe (20) is arranged downwardly inclined by 30-60°.

5. A high performance metal sheathed mineral fire resistant cable with a terminal box construction according to claim 4, characterised in that: A top cover (23) is fixedly installed on the top surface of the junction box (2), and the lower projection of the top cover (23) coincides with the lower projection of the junction box (2).

6. A high performance metal sheathed mineral fire resistant cable with a terminal box construction according to claim 5, characterised in that: A rectangular groove (21) is arranged on the top surface of the junction box (2), and a sealing gasket (22) is clamped and matched in the rectangular groove (21).

7. A high performance metal sheathed mineral fire resistant cable with a terminal box construction according to claim 6, characterised in that: The sealing gasket (22) and the rectangular groove (21) are both rectangular rings, and the size of the sealing gasket (22) is matched with the size of the rectangular groove (21).

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