Embossed aluminum sheath flexible fireproof cable and butt joint connector

Abstract

The utility model belongs to the field of cables, particularly relates to a flexible fireproof cable with an embossed aluminum sheath and a butt joint connector, and aims to solve the problems that the conventional flexible fireproof cable is high in manufacturing cost and use cost, low in adaptability and unstable in connection when being connected, and provides the following scheme: the flexible fireproof cable comprises a cable body, the cable comprises a cable body, the cable body comprises a plurality of conductors, the outer walls of the conductors are coated with mineral insulating layers, foaming fire-resistant silica gel filling ropes are arranged among the plurality of mineral insulating layers, and gaps between the foaming fire-resistant silica gel filling ropes and the mineral insulating layers are filled with first ceramic fire-resistant silica gel wrapping tapes. A traditional copper sheath is replaced by the embossed aluminum sheath, so that the cost of the cable is remarkably reduced, the butt joint connector is reasonable in design, the two cable bodies can be easily connected through the threaded cylinder and the clamping assembly, and the connection stability and the conductive performance are ensured.

Description

Technical Field

[0001] This utility model relates to the field of cable technology, and in particular to a corrugated aluminum sheathed flexible fireproof cable and a butt connector. Background Technology

[0002] Flexible fire-resistant cables are mainly used for power supply in fire protection systems in densely populated and hazardous locations such as schools, hospitals, high-rise and super high-rise residential buildings, shopping malls, theaters, museums, and airport terminals. Currently used cables are mineral-insulated corrugated copper-sheathed flexible fire-resistant cables conforming to the RTTZ (GB / T34926-2017) and YTTW (JB / T313-2014) standards.

[0003] Both types of flexible fire-resistant cables meet the requirements of product standards. However, both types of flexible fire-resistant cables have corrugated copper sheaths, which result in high manufacturing and usage costs. my country is short of copper resources and a large amount of copper materials need to be imported, which leads to high manufacturing and usage costs. Furthermore, the cables have low compatibility, unstable connections, and are inconvenient to use when connected. Utility Model Content

[0004] The purpose of this utility model is to solve the shortcomings of existing flexible fire-resistant cables, such as high manufacturing and usage costs, low adaptability, unstable connection, and inconvenience in use. Therefore, this utility model proposes a corrugated aluminum sheathed flexible fire-resistant cable and a butt connector.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A corrugated aluminum sheathed flexible fireproof cable includes a cable body comprising multiple conductors. The outer walls of the conductors are covered with mineral insulation layers. Foamed fire-resistant silicone filler ropes are disposed between the multiple mineral insulation layers. The gaps between the foamed fire-resistant silicone filler ropes and the mineral insulation layers are filled with a first ceramizable fire-resistant silicone tape. A corrugated aluminum sheath body is disposed on the outer wall of the first ceramizable fire-resistant silicone tape. A second ceramizable fire-resistant silicone tape is disposed on the outer wall of the corrugated aluminum sheath body. A halogen-free low-smoke sheath is disposed on the outer wall of the second ceramizable fire-resistant silicone tape. The outer wall of the halogen-free low-smoke sheath is covered with a protective layer, and a metal mesh layer is embedded inside the protective layer.

[0007] In one possible design, the conductor is made of oxygen-free copper, the mineral insulation layer is made of ceramizable mica tape, the second ceramizable fire-resistant silicone tape has two layers, the halogen-free low-smoke sheath is made of halogen-free low-smoke flame-retardant polyolefin, the metal mesh layer is made of stainless steel wire, and the protective layer is made of polyethylene.

[0008] A butt connector for use with the above-mentioned corrugated aluminum sheathed flexible fireproof cable includes a first plastic tube and a second plastic tube. A conductive block is embedded in one end of the first plastic tube and the second plastic tube, which are close to each other. One end of the conductive block is provided with a circular groove that is used to cooperate with the cable body. The two conductive blocks are provided with the same connecting component for conducting the circuit at the close ends of each other.

[0009] Both the first plastic tube and the second plastic tube have threaded tubes threaded through their ends at opposite ends, and one end of the threaded tube is provided with a clamping component for clamping the cable body.

[0010] The two threaded cylinders are respectively fixedly connected to a first mounting ring and a second mounting ring at their far ends, and a set of fixing components for fixing the first plastic cylinder and the second plastic cylinder is provided between the first mounting ring and the second mounting ring.

[0011] In one possible design, the connecting assembly includes a connecting threaded groove formed on one side of one of the conductive blocks, and a connecting threaded rod fixedly connected to one side of the other conductive block, the connecting threaded rod being threadedly connected to the connecting threaded groove.

[0012] In one possible design, the clamping assembly includes a limiting block fixedly connected to one end of the threaded cylinder. A plurality of sliding grooves are provided on one side of the limiting block. A slider is slidably connected inside the sliding groove. A sliding plate is fixedly connected to one side of the slider. The same spring is fixedly connected between one side of the slider and the inner wall of one side of the sliding groove. An arc-shaped block is fixedly connected to one end of the sliding plate.

[0013] In one possible design, the fixing assembly includes a plurality of fixing screws fixedly connected to one side of the second mounting ring. The first mounting ring has a plurality of threaded holes inside. The fixing screws mate with the threaded holes. A fixing nut is threaded onto the outer wall of the fixing screw. A washer is fitted onto the outer wall of the fixing screw. The washer is located between the first mounting ring and the fixing nut.

[0014] In one possible design, the threaded cylinder and the limiting block are both provided with multiple clearance holes, and one end of the conductive block is fixedly connected with multiple triangular blocks. The triangular blocks are used in conjunction with the clearance holes, and the inclined surface of the triangular blocks abuts against one end of the sliding plate.

[0015] In this application, the cable conductors of 25mm² and below are round, tightly stranded conductors, while those of 35mm² and above are irregularly shaped, single-wire stranded conductors. The conductor material is oxygen-free copper, and the number of conductor cores is 1-5. The outer insulation layer of the conductor is a fire-resistant mineral material, specifically ceramizable mica tape, with a thickness of 0.14-0.18mm. A 6-head wrapping machine is used to wrap 3-6 layers of mica tape around the conductor as a fire-resistant insulation layer. The fire resistance temperature of the first ceramizable mica tape is 1100℃. The 3-5 insulated cores with the mica tape wrapped are then cabled on a cabling machine. The gaps between the insulated cores are filled with foamed, flame-retardant, fire-resistant silicone rubber filler rope to create a rounded shape. This foamed, flame-retardant, fire-resistant silicone rubber filler rope is lightweight, low-cost, and has good processing performance. Three layers of ceramizable fire-resistant silicone rubber wrapping are wrapped around the cable core as a buffer layer, with an overlap rate of 25% for each layer. The corrugated aluminum sheath body is argon-arc welded. The specific gravity of the corrugated aluminum sheath body is approximately 2.7 g / cm³, while that of copper is 8.89 g / cm³. The unit price of aluminum is 27 yuan / kg, and the unit price of copper is 75 yuan / kg. Comparing the two materials, the corrugated aluminum sheath body is more cost-effective. The corrugated aluminum sheath body has a melting point of 670℃. To protect the integrity of the corrugated aluminum sheath body, two layers of second ceramizable refractory silicone rubber wrapping are wrapped around it. In the event of a fire, when the flame temperature reaches 560℃, the second ceramizable refractory silicone rubber wrapping will sinter into a ceramic shell, preventing the internal temperature from rising further and protecting the integrity of the inner corrugated aluminum sheath body. A halogen-free, low-smoke, flame-retardant polyolefin sheath is extruded over the second ceramizable fire-resistant silicone rubber tape. The inner layer is protected by the second ceramizable fire-resistant silicone rubber tape, which prevents the second ceramizable fire-resistant silicone rubber tape from being damaged during cable installation and laying, while also blocking the spread of flames. The outer protective layer further enhances the strength of the cable body, and an internal metal mesh layer is provided to strengthen the toughness of the device.

[0016] When connecting two cable bodies, first insert the cable bodies at both ends into the first plastic cylinder. At this time, one end of the cable body abuts against the circular groove of the conductive block, ensuring good conductivity. Rotate the threaded cylinder, and one end of the threaded cylinder extends into the first plastic cylinder. At this time, the threaded cylinder drives multiple sliding plates to move closer to the conductive block. The sliding plates abut against the triangular block, and the sliding plates move closer to each other. The sliding plates drive the arc-shaped block to move, and the multiple arc-shaped blocks clamp the cable body to prevent the cable body from loosening, ensuring stable conductivity. It also drives the slider to move inside the groove, compressing the spring, which helps the arc-shaped block to rebound. Then, put the washer on the fixing screw and tighten the fixing nut. This can prevent the distance between the first mounting ring and the second mounting ring from changing, ensuring the stability of the connection between the first plastic cylinder and the second plastic cylinder.

[0017] Beneficial effects: By replacing the traditional copper sheath with a corrugated aluminum sheath, the cost of the cable is significantly reduced. Aluminum is much less dense than copper and is also much cheaper, which greatly reduces the production cost of the cable.

[0018] The cable's internal insulation layer uses ceramizable mica tape, a material that sintersects into a ceramic shell at high temperatures, effectively preventing the spread of flames and the rise in internal temperature. Furthermore, a corrugated aluminum sheath and a second ceramizable fire-resistant silicone tape further enhance the cable's fire resistance.

[0019] The cable has an internal metal mesh layer made of stainless steel wire, which enhances the cable's toughness and tensile strength. At the same time, the metal mesh layer also prevents the cable from being damaged by external forces during installation and use.

[0020] The connector is rationally designed, allowing for easy connection of two cable bodies via a threaded sleeve and clamping assembly, ensuring connection stability and conductivity. Furthermore, the design of the fixing components simplifies and expedites installation and maintenance.

[0021] The cable's outer sheath is made of halogen-free, low-smoke, flame-retardant polyolefin, which boasts excellent flame-retardant and environmentally friendly properties. Furthermore, this protective layer further enhances the cable's strength and durability. Attached Figure Description

[0022] Figure 1 This is a three-dimensional cross-sectional view of the cable body in the corrugated aluminum sheathed flexible fireproof cable and the butt connector proposed in this utility model.

[0023] Figure 2 This is a three-dimensional structural diagram of a corrugated aluminum sheathed flexible fireproof cable and its connecting connector after connection, as proposed in this utility model.

[0024] Figure 3 This is a three-dimensional structural diagram of a corrugated aluminum sheathed flexible fireproof cable and its connector after being exploded, as proposed in this utility model.

[0025] Figure 4 This is an exploded view of a corrugated aluminum sheathed flexible fireproof cable and its connector proposed in this utility model.

[0026] Figure 5 This is a three-dimensional structural diagram of the threaded cylinder in the corrugated aluminum sheathed flexible fireproof cable and the butt joint connector proposed in this utility model.

[0027] In the diagram: 1. Cable body; 101. Conductor; 102. Mineral insulation layer; 103. Foamed fire-resistant silicone filler rope; 104. First ceramizable fire-resistant silicone wrapping tape; 105. Corrugated aluminum sheath body; 106. Second ceramizable fire-resistant silicone wrapping tape; 107. Halogen-free low-smoke sheath; 108. Metal mesh layer; 109. Protective layer; 2. First mounting ring; 3. First plastic cylinder; 4. Fixing screw; 5. Second plastic cylinder; 6. Threaded hole; 7. Conductive block; 8. Fixing nut; 9. Washer; 10. Second mounting ring; 11. Connecting threaded rod; 12. Connecting threaded groove; 14. Triangular block; 15. Limiting block; 16. Threaded cylinder; 17. Sliding plate; 18. Arc block; 19. Spring; 20. Sliding block; 21. Slide groove; 22. Clearance hole. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0029] Example 1, referring to Figure 1-5 A corrugated aluminum sheathed flexible fireproof cable, used in the cable industry, includes: a cable body 1, the cable body 1 including multiple conductors 101, the outer wall of the conductors 101 being covered with a mineral insulation layer 102, foamed fire-resistant silicone filler ropes 103 being disposed between the multiple mineral insulation layers 102, the gap between the foamed fire-resistant silicone filler ropes 103 and the mineral insulation layers 102 being filled with a first ceramizable fire-resistant silicone tape 104, the outer wall of the first ceramizable fire-resistant silicone tape 104 being provided with a corrugated aluminum sheath body 105, and the outer wall of the corrugated aluminum sheath body 105 being provided with a second... The second ceramicizable refractory silicone tape 106 has a halogen-free low-smoke sheath 107 on its outer wall, and a protective layer 109 covering the outer wall of the halogen-free low-smoke sheath 107. A metal mesh layer 108 is embedded inside the protective layer 109. The conductor 101 is made of oxygen-free copper, and the mineral insulation layer 102 is made of ceramicizable mica tape. The second ceramicizable refractory silicone tape 106 has two layers. The halogen-free low-smoke sheath 107 is made of halogen-free low-smoke flame-retardant polyolefin, the metal mesh layer 108 is made of stainless steel wire, and the protective layer 109 is made of polyethylene.

[0030] A butt connector, used in conjunction with the aforementioned corrugated aluminum sheathed flexible fireproof cable, includes a first plastic tube 3 and a second plastic tube 5. Conductive blocks 7 are embedded at the ends of the first plastic tube 3 and the second plastic tube 5 that are close to each other. One end of each conductive block 7 has a circular groove that mates with the cable body 1. The ends of the two conductive blocks 7 that are close to each other are provided with the same connecting component for conducting the circuit. The connecting component includes a connecting threaded groove 12 on one side of one of the conductive blocks 7, and a connecting threaded rod 11 fixedly connected to one side of the other conductive block 7. The connecting threaded rod 11 is threadedly connected to the connecting threaded groove 12. When it is necessary to connect the two cable bodies 1, the two ends of the cable bodies 1 are first inserted into the interior of the first plastic tube 3. At this time, one end of the cable body 1 abuts against the circular groove of the conductive block 7, ensuring good conductivity.

[0031] The ends of the first plastic cylinder 3 and the second plastic cylinder 5, which are far apart from each other, are threaded through a threaded cylinder 16. One end of the threaded cylinder 16 is provided with a clamping assembly for clamping the cable body 1. The clamping assembly includes a limiting block 15 fixedly connected to one end of the threaded cylinder 16. Multiple sliding grooves 21 are formed on one side of the limiting block 15. A slider 20 is slidably connected inside the sliding groove 21. A sliding plate 17 is fixedly connected to one side of the slider 20. A single spring 19 is fixedly connected between one side of the slider 20 and the inner wall of one side of the sliding groove 21. One end of the sliding plate 17 is fixed... With the arc-shaped block 18 connected, the threaded cylinder 16 is rotated, and one end of the threaded cylinder 16 extends into the interior of the first plastic cylinder 3. At this time, the threaded cylinder 16 drives multiple sliding plates 17 to approach the conductive block 7. The sliding plates 17 abut against the triangular block 14. At this time, the sliding plates 17 approach each other, and the sliding plates 17 drive the arc-shaped block 18 to move. The multiple arc-shaped blocks 18 clamp the cable body 1 to prevent the cable body 1 from becoming loose, ensuring the stability of the conductivity, and drive the slider 20 to move inside the groove 21. The compression spring 19 can help the arc-shaped block 18 to rebound.

[0032] Two threaded cylinders 16 are fixedly connected to a first mounting ring 2 and a second mounting ring 10 at their far ends. A set of fixing components for fixing the first plastic cylinder 3 and the second plastic cylinder 5 is provided between the first mounting ring 2 and the second mounting ring 10. The fixing components include multiple fixing screws 4 fixedly connected to one side of the second mounting ring 10. The first mounting ring 2 has multiple threaded holes 6 inside. The fixing screws 4 cooperate with the threaded holes 6. The outer wall of the fixing screws 4 is threaded with a fixing nut 8. The outer wall of the fixing screws 4 is fitted with a washer 9. The washer 9 is located between the first mounting ring 2 and the fixing nut 8. The washer 9 is then put on the fixing screws 4 and the fixing nut 8 is tightened. This can prevent the distance between the first mounting ring 2 and the second mounting ring 10 from changing and ensure the stability of the connection between the first plastic cylinder 3 and the second plastic cylinder 5.

[0033] Example 2, Reference Figure 1-5An improvement based on embodiment 1: multiple clearance holes 22 are provided inside the threaded cylinder 16 and the limiting block 15, and multiple triangular blocks 14 are fixedly connected to one end of the conductive block 7. The triangular blocks 14 are used in conjunction with the clearance holes 22, and the inclined surface of the triangular blocks 14 abuts against one end of the sliding plate 17.

[0034] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A flexible fire-resistant cable with a corrugated aluminum sheath, characterized in that, include: The cable body (1) includes multiple conductors (101). The outer wall of each conductor (101) is covered with a mineral insulation layer (102). Foamed refractory silicone filler ropes (103) are arranged between the multiple mineral insulation layers (102). The gap between the foamed refractory silicone filler ropes (103) and the mineral insulation layers (102) is filled with a first ceramizable refractory silicone wrapping tape (104). The outer wall of the first ceramizable refractory silicone wrapping tape (104) is provided with a corrugated aluminum sheath body (105). The outer wall of the corrugated aluminum sheath body (105) is provided with a second ceramizable refractory silicone wrapping tape (106). The outer wall of the second ceramizable refractory silicone wrapping tape (106) is provided with a halogen-free low-smoke sheath (107). The outer wall of the halogen-free low-smoke sheath (107) is covered with a protective layer (109). A metal mesh layer (108) is embedded inside the protective layer (109).

2. The corrugated aluminum sheathed flexible fireproof cable according to claim 1, characterized in that, The conductor (101) is made of oxygen-free copper, the mineral insulation layer (102) is made of ceramizable mica tape, the second ceramizable fire-resistant silicone tape (106) has two layers, the halogen-free low-smoke sheath (107) is made of halogen-free low-smoke flame-retardant polyolefin, the metal mesh layer (108) is made of stainless steel wire, and the protective layer (109) is made of polyethylene.

3. A mating connector, used in conjunction with the corrugated aluminum sheathed flexible fireproof cable according to any one of claims 1-2, characterized in that, It includes a first plastic tube (3) and a second plastic tube (5). The first plastic tube (3) and the second plastic tube (5) are each embedded with a conductive block (7) at one end close to each other. One end of the conductive block (7) is provided with a circular groove that cooperates with the cable body (1). The two conductive blocks (7) are provided with the same connecting component for conducting the circuit at one end close to each other. The first plastic tube (3) and the second plastic tube (5) are both threaded through a threaded tube (16) at their ends that are far apart from each other. One end of the threaded tube (16) is provided with a clamping component for clamping the cable body (1). The two threaded cylinders (16) are respectively fixedly connected to a first mounting ring (2) and a second mounting ring (10) at their far ends. The same set of fixing components for fixing the first plastic cylinder (3) and the second plastic cylinder (5) is provided between the first mounting ring (2) and the second mounting ring (10).

4. A mating connector according to claim 3, characterized in that, The connecting assembly includes a connecting threaded groove (12) formed on one side of one of the conductive blocks (7), and a connecting threaded rod (11) fixedly connected to one side of the other conductive block (7), the connecting threaded rod (11) being threadedly connected to the connecting threaded groove (12).

5. A mating connector according to claim 3, characterized in that, The clamping assembly includes a limiting block (15) fixedly connected to one end of the threaded cylinder (16). A plurality of sliding grooves (21) are provided on one side of the limiting block (15). A slider (20) is slidably connected inside the sliding groove (21). A sliding plate (17) is fixedly connected to one side of the slider (20). The same spring (19) is fixedly connected between one side of the slider (20) and the inner wall of one side of the sliding groove (21). An arc-shaped block (18) is fixedly connected to one end of the sliding plate (17).

6. A mating connector according to claim 3, characterized in that, The fixing assembly includes a plurality of fixing screws (4) fixedly connected to one side of the second mounting ring (10). The first mounting ring (2) has a plurality of threaded holes (6) inside. The fixing screws (4) cooperate with the threaded holes (6). The outer wall of the fixing screws (4) is threaded with a fixing nut (8). The outer wall of the fixing screws (4) is fitted with a washer (9). The washer (9) is located between the first mounting ring (2) and the fixing nut (8).

7. A mating connector according to claim 5, characterized in that, The threaded cylinder (16) and the limiting block (15) are provided with multiple clearance holes (22). One end of the conductive block (7) is fixedly connected with multiple triangular blocks (14). The triangular blocks (14) are used in conjunction with the clearance holes (22). The inclined surface of the triangular blocks (14) abuts against one end of the sliding plate (17).

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