Novel rare earth aluminum alloy fireproof cable

Abstract

The utility model relates to a novel rare earth aluminum alloy fire-resistant cable, which comprises an inner core, a cable core filling cavity, an inner sheath and an outer sheath, can reduce the extrusion strength of inward conduction of external force due to the softness and elasticity of a deformation block and the assistance of flexible deformation of a pressure-relieving ring, and can further buffer the force for extruding the pressure-relieving ring due to the fact that a filler is filled outside the pressure-relieving ring, so that the service life of the cable is prolonged. And through the structural composition of the tight protection layer and the spring steel, the inward extrusion strength of the external force is further buffered, so that the damage influence of the external force on the inner core in the process of bending and winding the cable by personnel is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a new rare earth aluminum alloy fire-resistant cable. Background Art

[0002] The new rare earth aluminum alloy fire-resistant cable uses aluminum as the main conductor and is made by adding rare earth elements through a special synthesis and annealing process. As the amount of rare earth elements added increases, the strength and plasticity of the aluminum alloy are improved, so that the cable not only inherits the advantages of traditional aluminum alloy cables, but also has significant improvements in conductivity, bending performance, creep resistance and corrosion resistance.

[0003] When optimizing the existing new rare earth aluminum alloy fire-resistant cables, most of them are reflected in solving the problem of poor bending performance of cables made of refractory rare earth high-iron aluminum alloy cable cores in the existing technology. For example, the Chinese utility model patent with application number CN201921012256.9 discloses "A refractory rare earth high-iron aluminum alloy cable core". In this device, it includes cables and multiple fixing plates. The cable consists of an outer protective layer, a wrapping tape layer, an insulating layer and multiple core bodies from the outside to the inside. The insulating layer is wrapped around the outside of the core body. Multiple fixing holes are evenly opened on the fixing plate. There is a gap between two adjacent fixing holes, and a connecting hole is opened on one side of the multiple fixing holes. The core body is clamped inside the fixing hole. It is cleverly designed and simple to operate. It solves the problem of poor bending performance of cables made of refractory rare earth high-iron aluminum alloy cable cores in the existing technology and is easy to promote and use.

[0004] Although the above-mentioned new rare earth aluminum alloy fire-resistant cable has certain advantages in solving the problem of poor bending performance of cables made of fire-resistant rare earth high-iron aluminum alloy cable cores in the existing technology, it still has certain disadvantages: the cables in the existing technology are usually protected by a sheath as an insulating layer around the outside, and the inside is composed of twisted wires. When using cables with longer lengths, people usually need to bend and twist the cables, and the hard friction between the wires is prone to wear, which in turn causes sparks and causes the cable to burn. Utility Model Content

[0005] (1) Technical problems solved

[0006] In order to solve the above technical problems, the utility model provides a new rare earth aluminum alloy fire-resistant cable.

[0007] (2) Technical solution

[0008] Based on this, the utility model provides the following technical solution: a new rare earth aluminum alloy fire-resistant cable, comprising an inner core, a cable core filling cavity, an inner sheath and an outer sheath, wherein the inner core is arranged on the inner side of the cable core filling cavity, and the outer peripheral surface of the inner sheath is adhesively connected to the inner side surface of the outer sheath;

[0009] The cable core filling cavity includes a filler, a deformation block, a pressure relief ring and a tight protective layer. The filler is filled on the outer side of the pressure relief ring, the deformation block is embedded and movable inside the pressure relief ring, and the outer peripheral surface of the tight protective layer is fixedly adhered to the inner annular surface of the pressure relief ring.

[0010] The inner sheath includes a first fire-resistant layer, a second fire-resistant layer, a temperature-control layer, a surrounding flap and spring steel. The inner side surface of the first fire-resistant layer is fixedly adhered to the outer peripheral surface of the second fire-resistant layer, the inner side surface of the second fire-resistant layer is adhered to the outer side surface of the temperature-control layer, the surrounding flap is located on the inner side of the temperature-control layer, the middle part of the rear end of the spring steel is connected and installed with the inner side surface of the temperature-control layer, and the two side ends of the spring steel are connected to the back side ends of the surrounding flap and are movably matched.

[0011] Preferably, the filler is arranged on the inner side of the inner sheath, and the filler is selected to be a glass fiber material, which has a heat insulating effect and can buffer the force of squeezing the pressure relief ring to ensure the roundness of the cable.

[0012] Preferably, the tight protective layer is sleeved and connected to the outer periphery of the inner core. The tight protective layer is in a ring structure and is made of polyethylene material, which has good tensile strength, reduces the external force applied to the inner core during the twisting and bending process, and reduces the damage to the inner core. The deformation block is a block of elastic plastic material with high resilience, and the auxiliary pressure relief ring as a whole deforms when subjected to external force, thereby buffering the extrusion strength of the external force on the inner core.

[0013] Preferably, the petal gap is located on the outside of the filler, and there are three petals and three spring steels, and the three petals form a ring. With the elastic cooperation of the spring steel, the circular diameter surrounded by the inner side can be flexibly expanded and contracted, further buffering the strength of the external force squeezing inward.

[0014] Preferably, the outer peripheral surface of the first fire-resistant layer is adhesively connected to the inner side surface of the outer sheath.

[0015] Preferably, the first fire-resistant layer is made of antimony trioxide material, which is a better inorganic flame retardant material and can be used in conjunction with organic flame retardant materials to achieve better results. The second fire-resistant layer is made of brominated polystyrene material, which is a better organic flame retardant material. The annular structure composed of the first fire-resistant layer and the second fire-resistant layer is an important component of the fire-resistant properties of the entire cable.

[0016] Preferably, the temperature control layer is made of halogen-free, low-smoke, highly flame-retardant polyolefin material, which plays a role of flame retardancy and oxygen isolation, further enhancing the fire resistance of the cable.

[0017] The outer sheath is made of halogen-free, low-smoke, flame-retardant polyolefin sheath material, which has excellent temperature adaptability and insulation effect.

[0018] (3) Beneficial effects

[0019] Compared with the existing technology, the utility model provides a new rare earth aluminum alloy fire-resistant cable with the following beneficial effects:

[0020] 1. This new type of rare earth aluminum alloy fire-resistant cable, due to the softness and elasticity of the deformation block and the flexible deformation of the auxiliary pressure relief ring, can reduce the extrusion strength of the external force transmitted inward, and the filler is filled on the outside of the pressure relief ring, which can further buffer the force of squeezing the pressure relief ring and ensure the roundness of the inner core. The structure of the tight protective layer and spring steel further buffers the intensity of the external force extruding inward, thereby avoiding the damage of the inner core caused by external force when people bend and twist the cable.

[0021] 2. This new type of rare earth aluminum alloy fire-resistant cable uses halogen-free, low-smoke, highly flame-retardant polyolefin material for the temperature control layer, which plays a flame-retardant and oxygen-isolating role. The first fire-resistant layer uses antimony trioxide material, and the second fire-resistant layer uses brominated polystyrene material. The first fire-resistant layer is a better inorganic flame-retardant material, and the second fire-resistant layer is a better organic flame-retardant material. The two are closely bonded and cooperate with each other, which can make the entire cable have excellent fire-resistant properties, thereby avoiding the situation where the cable burns. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0023] Figure 2 This is a schematic structural diagram of the inner core of the utility model;

[0024] Figure 3 This is a structural diagram of the cable core filling cavity of the utility model;

[0025] Figure 4 This is a schematic structural diagram of the inner sheath of the present utility model.

[0026] In the figure: inner core 1, cable core filling cavity 2, inner sheath 3, outer sheath 4, filler 21, deformation block 22, pressure relief ring 23, tight protective layer 24, first fire-resistant layer 31, second fire-resistant layer 32, temperature control layer 33, surrounding petal 34, spring steel 35. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] See also Figure 1-2 A new type of rare earth aluminum alloy fire-resistant cable includes an inner core 1, a cable core filling cavity 2, an inner sheath 3 and an outer sheath 4. The inner core 1 is arranged on the inner side of the cable core filling cavity 2, the outer peripheral surface of the inner sheath 3 is adhesively connected to the inner side of the outer sheath 4, and the outer peripheral surface of the first fire-resistant layer 31 is adhesively connected to the inner side of the outer sheath 4. The outer sheath 4 is made of halogen-free low-smoke flame-retardant polyolefin sheath material, which has excellent temperature adaptability and insulation effect.

[0029] See also Figure 3-4A new type of rare earth aluminum alloy fire-resistant cable, the cable core filling cavity 2 includes a filler 21, a deformation block 22, a pressure-relief ring 23 and a tight protective layer 24, the filler 21 is filled on the outer side of the pressure-relief ring 23, the deformation block 22 is embedded in the inner side of the pressure-relief ring 23, and the outer peripheral surface of the tight protective layer 24 is fixedly adhered to the inner ring surface of the pressure-relief ring 23; the inner sheath 3 includes a first fire-resistant layer 31, a second fire-resistant layer 32, a temperature control layer 33, a petal 34 and a spring steel 35, the inner side surface of the first fire-resistant layer 31 is fixedly adhered to the outer peripheral surface of the second fire-resistant layer 32, and the second fire-resistant layer 33 is fixedly adhered to the outer peripheral surface of the second fire-resistant layer 32. The inner side of the fire layer 32 is adhered to the outer side of the temperature control layer 33, the surrounding flap 34 is located on the inner side of the temperature control layer 33, the middle of the rear end of the spring steel 35 is connected to the inner side of the temperature control layer 33, and the two side ends of the spring steel 35 are connected to the back side ends of the surrounding flap 34 and are movably matched. The filler 21 is arranged on the inner side of the inner sheath 3. The filler 21 is made of glass fiber material, which has a heat insulating effect and can buffer the force of squeezing the pressure relief ring 23 to ensure the roundness of the cable. The tight protective layer 24 is sleeved and connected to the outer periphery of the inner core 1, and the tight protective layer 24 is a ring structure. The structure is made of polyethylene material with good tensile strength, which reduces the external force on the inner core 1 during the bending process and reduces the damage to the inner core 1. The deformation block 22 is an elastic plastic material block with high resilience. The auxiliary pressure-relief ring 23 deforms as a whole when subjected to external force to buffer the extrusion strength of the inner core 1 by the external force. The gap between the petals 34 is located on the outside of the filler 21. There are three petals 34 and three spring steels 35, and the three petals 34 form a ring. Under the elastic cooperation of the spring steel 35, the circular diameter surrounded by the inner side can be flexibly expanded and contracted, further In order to buffer the strength of the inward extrusion of the external force, the first fire-resistant layer 31 is made of antimony trioxide material, which is a better inorganic flame retardant material and can be used in conjunction with organic flame retardant materials to achieve better results. The second fire-resistant layer 32 is made of brominated polystyrene material, which is a better organic flame retardant material. The annular structure composed of the first fire-resistant layer 31 and the second fire-resistant layer 32 is an important component of the fire-resistant properties of the entire cable. The temperature control layer 33 is made of halogen-free, low-smoke, high-flame-retardant polyhydrocarbon material, which plays a role in flame retardancy and oxygen isolation, further enhancing the fire resistance of the cable.

[0030] In summary, the tight protective layer 24 is annularly sleeved on the outer periphery of the inner core 1 which is made of aluminum as the main conductor, by adding rare earth aluminum alloy elements, and then synthesized and toughened by a special process. The tight protective layer 24 is then embedded and placed on the inner side of the pressure relief ring 23. The softness and elasticity of the deformation block 22 assists the pressure relief ring 23 to deform flexibly, which can reduce the extrusion strength of the external force transmitted inward. The filler 21 is filled on the outer side of the pressure relief ring 23, which can further buffer the force of squeezing the pressure relief ring 23 and ensure the roundness of the inner core 1. The structure of the tight protective layer 24 and the spring steel 35 is composed of the circular diameter enclosed by the inner side of the petal 34, which can be flexibly expanded. The shrinkage further buffers the strength of the inward squeezing of the external force, thereby avoiding the damage of the inner core 1 by the external force when people bend and twist the cable. The temperature control layer 33 is made of halogen-free, low-smoke, and highly flame-retardant polyolefin material, which plays a role in flame retardancy and oxygen isolation. The first fire-resistant layer 31 is made of antimony trioxide material, and the second fire-resistant layer 32 is made of brominated polystyrene material. The first fire-resistant layer 31 is a better inorganic flame retardant material, and the second fire-resistant layer 32 is a better organic flame retardant material. The two are sticky and cooperate with each other, which can make the entire cable have excellent fire-resistant properties, thereby avoiding the situation where the cable burns.

[0031] The control method of the present invention is to manually start and stop the switch. The wiring diagram of the power element and the provision of power supply are common knowledge in the field. Moreover, the present invention is mainly used to protect mechanical devices. Therefore, the control method and wiring arrangement are not explained in detail in the present invention.

[0032] The control method of the present invention is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by technicians in this field. The provision of power is also common knowledge in this field. In addition, the present invention is mainly used to protect mechanical devices, so the control method and circuit connection are no longer explained in detail in the present invention.

[0033] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A new type of rare earth aluminum alloy fire-resistant cable, characterized by: It comprises an inner core (1), a cable core filling cavity (2), an inner sheath (3) and an outer sheath (4), wherein the inner core (1) is arranged on the inner side of the cable core filling cavity (2), and the outer peripheral surface of the inner sheath (3) is adhesively connected to the inner side surface of the outer sheath (4); The cable core filling cavity (2) comprises a filler (21), a deformation block (22), a pressure-relief ring (23) and a tight protective layer (24); the filler (21) is filled on the outer side of the pressure-relief ring (23); the deformation block (22) is embedded and movable inside the pressure-relief ring (23); and the outer peripheral surface of the tight protective layer (24) is fixedly bonded to the inner annular surface of the pressure-relief ring (23); The inner sheath (3) comprises a first fire-resistant layer (31), a second fire-resistant layer (32), a temperature-controlling layer (33), a surrounding flap (34) and a spring steel (35). The inner side surface of the first fire-resistant layer (31) is fixedly adhered to the outer peripheral surface of the second fire-resistant layer (32), the inner side surface of the second fire-resistant layer (32) is adhered to the outer side surface of the temperature-controlling layer (33), the surrounding flap (34) is located on the inner side of the temperature-controlling layer (33), the middle part of the rear end of the spring steel (35) is connected and installed with the inner side surface of the temperature-controlling layer (33), and the two side ends of the spring steel (35) are connected and movably matched with the back side ends of the surrounding flap (34).

2. A new rare earth aluminum alloy fire-resistant cable according to claim 1, characterized in that: The filler (21) is arranged on the inner side of the inner sheath (3). The filler (21) is made of glass fiber material, which has a heat insulating effect and can buffer the force of squeezing the pressure relief ring (23) to ensure the roundness of the cable.

3. The novel rare earth aluminum alloy fire-resistant cable according to claim 1, characterized in that: The tight protective layer (24) is sleeve-connected to the outer periphery of the inner core (1). The tight protective layer (24) is in a sleeve structure and is made of polyethylene material, which has a good tensile strength, reduces the external force applied to the inner core (1) during the bending process, and reduces the damage to the inner core (1). The deformation block (22) is a block-shaped object made of elastic plastic material with high resilience. The auxiliary pressure-relief ring (23) deforms as a whole when subjected to external force, thereby buffering the extrusion strength of the external force on the inner core (1).

4. The novel rare earth aluminum alloy fire-resistant cable according to claim 1, characterized in that: The gap between the surrounding petals (34) is located outside the filler (21), and there are three surrounding petals (34) and three spring steels (35), and the three surrounding petals (34) form a ring.

5. The novel rare earth aluminum alloy fire-resistant cable according to claim 1, characterized in that: The outer peripheral surface of the first fire-resistant layer (31) is adhesively connected to the inner side surface of the outer sheath (4).

6. The novel rare earth aluminum alloy fire-resistant cable according to claim 1, characterized in that: The first fire-resistant layer (31) is made of antimony trioxide material, which is a better inorganic flame retardant material and is used in conjunction with organic flame retardant material. The second fire-resistant layer (32) is made of brominated polystyrene material, which is a better organic flame retardant material.

7. The novel rare earth aluminum alloy fire-resistant cable according to claim 1, characterized in that: The temperature control layer (33) is made of halogen-free, low-smoke, highly flame-retardant polyolefin material.

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