Novel copper core cable fireproof sheath structure

Abstract

The utility model relates to the technical field of cable fireproof sheaths, in particular to a novel copper core cable fireproof sheath structure, which comprises a first fireproof layer, a filling cavity is arranged in the first fireproof layer, and a flame retardant layer is arranged in the filling cavity. Through the arrangement of the first fireproof layer, the flame retardant layer and the second fireproof layer, the cable can effectively resist high temperature and flame attack in a fire, and the fire-resistant time of the cable is prolonged; according to the cable sheath, the two symmetrical sheath layers are arranged, the outer walls of the sheath layers are provided with the plurality of ribs, and the steel wires are installed in the ribs, so that the wear resistance of the cable sheath can be effectively improved under the action of the plurality of ribs, the tensile property of the cable sheath can be effectively improved under the action of the plurality of steel wires, and the service life of the cable sheath is prolonged. The integral structure of the cable sheath is improved; and through the arrangement of the clamping sleeve, the two sheath layers can be conveniently assembled and fixed, the two sheath layers can be conveniently disassembled in the later period, and the damaged sheath layer can be conveniently replaced.

Description

Technical Field

[0001] This utility model relates to the field of fireproof cable sheath technology, specifically a novel fireproof sheath structure for copper core cables. Background Technology

[0002] Currently, copper core cables are widely used in various fields as an important carrier for power and signal transmission. However, during use, copper core cables may cause fires due to short circuits, overloads, or other reasons, posing a serious threat to people's lives and property. Therefore, in order to improve the fire resistance of cables, fireproof sheaths are usually installed on the outside of the cables.

[0003] Utility model patent CN201610636101.7 discloses a fireproof sheath for wires and cables. This sheath comprises, from the outside in, a protective layer, a mixing layer, and a heat insulation layer. The sheath has an annular cross-section and a notch for easy operation. The mixing layer contains alternating polyolefin flame-retardant tubes and flame-retardant material filling tubes, and is also filled with expanded graphite and APP flame retardant. The flame-retardant material filling tubes are filled with powder... The powdered substance comprises the following components and weight percentages: sodium silicate powder 20-35%, calcium hydroxide 5-8%, magnesium hydroxide 6-8%, ceramic powder 4-8%, glass powder 4-6%, bentonite 4-8%, silica powder 10-15%, and triethyl ether phenyl phosphate powder 10-50%. The heat insulation layer comprises the following components and weight percentages: glass fiber 30-40%, hydrotalcite 40-60%, composite resin 5-10%, adhesive 4-6%, and water-repellent agent 0-1%. Using this structure, the fire-resistant sheath for wires and cables can be directly fitted over the outside of the wires and cables. In the event of a fire, the sheath expands to completely enclose and protect the entire wire and cable. The heat insulation layer and the composite layer of the sheath provide flame retardant protection. This solution allows for direct installation of the sheath at critical locations on existing cables, providing both excellent heat insulation and flame retardant effects.

[0004] Although the fireproof sheath for cables has excellent heat insulation and flame retardant effects, the device still has the following problems in actual use: Since the cable sheath is wrapped around the outside of the cable, the outer wall of the cable sheath will inevitably be subjected to friction and compression from external objects during use. Therefore, the outer wall of the cable sheath often suffers a lot of wear. The outer side of the sheath is only provided with a protective layer, which is very easy to be damaged under frequent friction, thus seriously affecting the overall appearance and protective performance of the cable sheath. In view of this, we propose a new type of fireproof sheath structure for copper core cables. Utility Model Content

[0005] The purpose of this utility model is to provide a novel fireproof sheath structure for copper core cables to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A novel fireproof sheath structure for copper core cables includes a first fireproof layer, with a filling cavity inside the first fireproof layer and a flame retardant layer inside the filling cavity.

[0008] A connecting layer is provided outside the first fireproof layer, a reinforcing layer is provided outside the connecting layer, and a second fireproof layer is provided outside the reinforcing layer.

[0009] The second fireproof layer is provided with two symmetrical sheath layers on the outside. Each sheath layer has a locking block at the end. One locking block has a connecting groove, and the other locking block has a fixed connecting block. The connecting groove is inserted into the adjacent connecting block.

[0010] Multiple protruding ribs are fixed on the outer wall of the sheath layer, and fixing holes are opened on the protruding ribs. Steel wires are fixed in the fixing holes.

[0011] Each pair of adjacent card blocks has a card sleeve on its exterior, and the card sleeve has a card slot that engages with the corresponding card block.

[0012] Preferably, the sheath layer and the card block are integrally molded structures, and both the sheath layer and the card block are made of polyvinyl chloride.

[0013] Preferably, the plurality of filling cavities are distributed in a ring at equal intervals, and the overall shape of the filling cavities is arc-shaped.

[0014] Preferably, the cross-sectional shape of the card block is trapezoidal, and the cross-sectional shape of the card slot is trapezoidal.

[0015] Preferably, the plurality of protruding ridges are distributed in a ring at equal intervals, and the diameter of the steel wire is 0.8-1.2 mm.

[0016] Preferably, the overall shape of the card sleeve is U-shaped, and the card sleeve is made of stainless steel.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] 1. By setting a first fireproof layer, a flame retardant layer, and a second fireproof layer, the cable can effectively resist high temperature and flame attack in a fire, extending the cable's fire resistance time.

[0019] 2. By setting two symmetrical sheath layers, the outer wall of the sheath layer is equipped with multiple protruding ribs, and steel wires are installed inside the protruding ribs. Under the action of multiple protruding ribs, the wear resistance of the cable sheath can be effectively improved, and under the action of multiple steel wires, the tensile strength of the cable sheath can be effectively improved, thus improving the overall structure of the cable sheath.

[0020] 3. The included clips facilitate the assembly and securing of the two sheath layers, as well as their subsequent disassembly for easy replacement of any damaged sheath layers. Attached Figure Description

[0021] Figure 1 This is a cross-sectional view of the overall structure of this utility model;

[0022] Figure 2 This is a partial structural cross-sectional view of the present invention;

[0023] Figure 3 This is a schematic diagram of the overall structure of this utility model;

[0024] Figure 4 This is a partial exploded structural diagram of the present invention;

[0025] Figure 5 This utility model Figure 4 Enlarged structural diagram of section A in the middle;

[0026] In the picture:

[0027] 1. First fireproof layer; 10. Filling cavity; 11. Flame retardant layer;

[0028] 2. Connecting layer;

[0029] 3. Reinforcement layer;

[0030] 4. Second fireproof layer;

[0031] 5. Sheath layer; 50. Locking block; 501. Connecting groove; 502. Connecting block;

[0032] 6. Raised ridge; 60. Fixing hole; 61. Steel wire;

[0033] 7. Card sleeve; 70. Card slot. Detailed Implementation

[0034] 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.

[0035] This embodiment provides a technical solution:

[0036] Please see Figures 1-5 As shown, a novel fireproof sheath structure for copper core cables includes a first fireproof layer 1, with a filling cavity 10 inside the first fireproof layer 1, and a flame retardant layer 11 inside the filling cavity 10; a connecting layer 2 is provided outside the first fireproof layer 1, a reinforcing layer 3 is provided outside the connecting layer 2, and a second fireproof layer 4 is provided outside the reinforcing layer 3; two symmetrical sheath layers 5 are provided outside the second fireproof layer 4, and each sheath layer 5 has a locking block 50 at its end, one locking block 50 having a connecting groove 501, and the other locking block 50 having a connecting block 502 fixed thereon, with the connecting groove 501 engaging with the adjacent connecting block 502; multiple protruding ridges 6 are fixed to the outer wall of the sheath layer 5, with fixing holes 60 on the protruding ridges 6, and steel wires 61 fixed inside the fixing holes 60; a retaining sleeve 7 is provided between the outer ends of two adjacent locking blocks 50, with a retaining groove 70 on the retaining sleeve 7, and the retaining groove 70 engaging with the corresponding locking block 50. Preferably, the sheath layer 5 and the card block 50 are integrally molded structures, and both the sheath layer 5 and the card block 50 are made of polyvinyl chloride.

[0037] In this embodiment, the multiple filling cavities 10 are distributed in a ring with equal spacing, and the overall shape of the filling cavities 10 is arc-shaped. The arrangement of multiple filling cavities 10 facilitates the uniform distribution of multiple flame retardant layers 11 along the outside of the copper core cable, thereby providing better fire protection for the cable.

[0038] In this embodiment, the cross-sectional shape of the locking block 50 is trapezoidal, and the cross-sectional shape of the locking groove 70 is also trapezoidal. The trapezoidal design makes it difficult for the sleeve 7 to detach from the locking block 50 after the slot 70 and the locking block 50 are engaged, thus ensuring the fixing effect of the sleeve 7 on the sheath layer 5.

[0039] In this embodiment, the multiple protruding ridges 6 are distributed in a ring at equal intervals, and the diameter of the steel wire 61 is 0.8-1.2 mm. The preferred diameter of the steel wire 61 is 1 mm. The arrangement of multiple protruding ridges 6 can effectively improve the wear resistance of the cable sheath, and the arrangement of multiple steel wires 61 can effectively improve the tensile strength of the cable sheath, thereby improving the service life and durability of the cable sheath.

[0040] In this embodiment, the overall shape of the ferrule 7 is U-shaped, and the ferrule 7 is made of stainless steel. The stainless steel ferrule 7 has the advantages of high structural strength and corrosion resistance, ensuring the service life of the ferrule 7, while the U-shaped design facilitates the cooperation between the ferrule 7 and the card block 50.

[0041] It is understood that the reinforcing layer 3 in this embodiment is made of woven glass fiber. This design can improve the mechanical strength and impact resistance of the entire sheath structure and prevent damage from external forces during a fire.

[0042] It should be added that, in this embodiment, the first fireproof layer 1 and the second fireproof layer 4 are both made of ceramicized silicone rubber. When a fire occurs, the first fireproof layer 1 and the second fireproof layer 4 can quickly form a dense heat insulation layer when exposed to fire, preventing the flame and high temperature from being conducted into the interior and protecting the core part of the cable from damage.

[0043] In practical use, the user first clamps the two sheath layers 5 on the outside of the second fireproof layer 4, and inserts the connecting block 502 into the connecting groove 501. At this time, the two locking blocks 50 are in contact. Then, the user inserts the locking groove 70 into one end of the two locking blocks 50 and pushes the locking groove 70 to slide along the two locking blocks 50. When the locking sleeve 7 completely covers the outside between the two locking blocks 50, the sheath layer 5 is installed.

[0044] When a fire occurs, the second fireproof layer 4 quickly forms a dense heat insulation layer under high temperature. The heat insulation layer prevents the flames and high temperature from being conducted inward, so the copper core cable inside the first fireproof layer 1 is unaffected.

[0045] 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 novel fireproof sheath structure for copper core cables, comprising a first fireproof layer (1), characterized in that: The first fireproof layer (1) has a filling cavity (10) inside, and a flame retardant layer (11) is provided inside the filling cavity (10); The first fireproof layer (1) is provided with a connecting layer (2) on the outside, the connecting layer (2) is provided with a reinforcing layer (3) on the outside, and the reinforcing layer (3) is provided with a second fireproof layer (4) on the outside; The second fireproof layer (4) has two symmetrical sheath layers (5) on its outside. Each sheath layer (5) has a locking block (50) at its end. One of the locking blocks (50) has a connecting groove (501) and the other locking block (50) has a connecting block (502) fixed on it. The connecting groove (501) and the adjacent connecting block (502) are inserted into each other. Multiple protruding ribs (6) are fixed on the outer wall of the sheath layer (5), and fixing holes (60) are opened on the protruding ribs (6), and steel wires (61) are fixed in the fixing holes (60); Each of the two adjacent card blocks (50) is provided with a card sleeve (7) on its exterior. The card sleeve (7) has a card slot (70) and the card slot (70) engages with the corresponding card block (50).

2. The novel fireproof sheath structure for copper core cables according to claim 1, characterized in that: The sheath layer (5) and the card block (50) are integrally molded structures, and both the sheath layer (5) and the card block (50) are made of polyvinyl chloride.

3. The novel fireproof sheath structure for copper core cables according to claim 1, characterized in that: The multiple filling cavities (10) are distributed in a ring with equal spacing, and the overall shape of the filling cavities (10) is arc-shaped.

4. The novel fireproof sheath structure for copper core cables according to claim 1, characterized in that: The cross-sectional shape of the card block (50) is trapezoidal, and the cross-sectional shape of the card slot (70) is trapezoidal.

5. The novel fireproof sheath structure for copper core cables according to claim 1, characterized in that: The multiple protruding ridges (6) are distributed in a ring at equal intervals, and the diameter of the steel wire (61) is 0.8-1.2 mm.

6. The novel fireproof sheath structure for copper core cables according to claim 1, characterized in that: The overall shape of the card sleeve (7) is U-shaped, and the card sleeve (7) is made of stainless steel.

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