A rare earth high-iron aluminum alloy fireproof cable

Abstract

The utility model provides a rare earth high-iron aluminum alloy fireproof cable, which relates to the technical field of power cables. A rare earth high-iron aluminum alloy fireproof cable includes an inner protective layer, an outer protective layer and a sheath arranged in sequence from the inside to the outside, a plurality of partitions are arranged between the inner protective layer and the outer protective layer, a rare earth high-iron aluminum alloy conductor is arranged between adjacent partitions, a filler is arranged around the rare earth high-iron aluminum alloy conductor, the sheath is detachably connected to the outer protective layer, and a plurality of flame retardant units are arranged between the sheath and the outer protective layer. It can improve the fireproof performance of the cable and ensure that the cable can be used normally even at high temperatures.

Description

Technical Field

[0001] The utility model relates to the technical field of power cables, in particular to a rare earth high-iron aluminum alloy fireproof cable. Background Art

[0002] As the fire protection requirements of domestic buildings become more and more stringent, especially when selecting power cables, the fire department has higher requirements for the fire protection level of cables. The low-voltage insulated fire-resistant cables in the existing technology mainly include the following types: one is the low-voltage insulated fire-resistant cable wrapped with mica tape; the other is the mineral insulated fire-resistant cable.

[0003] Among them, low-voltage fire-resistant cables wrapped with mica tapes use mica tapes and glass fiber tapes to form a fire-resistant insulation composite layer. This type of cable has a high probability of mica tape breakage and leakage during the manufacturing process, so the fire-resistant quality requirements are difficult to control, and the mica layer is prone to fall off during the wrapping process, resulting in reduced fire resistance performance of the cable and affecting the normal use of the cable. Utility Model Content

[0004] The purpose of the utility model is to provide a rare earth high iron aluminum alloy fireproof cable, which can improve the fireproof performance of the cable and ensure that the cable can be used normally even at high temperatures.

[0005] The embodiments of the present invention are implemented by the following technical solutions:

[0006] A rare earth high-iron aluminum alloy fireproof cable comprises an inner protective layer, an outer protective layer and a sheath which are arranged in sequence from the inside to the outside, a plurality of partition plates are arranged between the inner protective layer and the outer protective layer, a rare earth high-iron aluminum alloy conductor is arranged between adjacent partition plates, a filler is arranged around the rare earth high-iron aluminum alloy conductor, the sheath is detachably connected to the outer protective layer, and a plurality of flame retardant units are arranged between the sheath and the outer protective layer.

[0007] Furthermore, the inner wall of the sheath is connected to a plurality of elastomers, and the other end of each of the elastomers is connected to a ball. The outer surface of the outer protective layer is provided with slide grooves corresponding to the balls one by one, and the balls slide in the slide grooves. The flame retardant unit is provided between adjacent slide grooves.

[0008] Furthermore, an arc-shaped baffle is arranged in the slide groove, a through hole is opened on the arc-shaped baffle, the elastic body is located in the through hole, and the diameter of the through hole is smaller than the diameter of the ball.

[0009] Furthermore, the flame retardant unit includes a shell and a flame retardant located in the shell.

[0010] Furthermore, the shell is a flexible body.

[0011] Furthermore, an explosion-proof layer and a fire-resistant layer are sequentially arranged on the surface of the rare earth high-iron aluminum alloy conductor, the explosion-proof layer is cross-linked polyethylene, and the fire-resistant layer is two layers of double-sided mica tapes cross-wound and wrapped.

[0012] Furthermore, the filler is a thermoplastic polyester elastomer.

[0013] The technical solution of the embodiment of the utility model has at least the following advantages and beneficial effects:

[0014] In the utility model, the inner protective layer, the outer protective layer and the partition plate cooperate to prevent wear between the rare earth high-iron aluminum alloy conductors, avoid the rare earth high-iron aluminum alloy conductors from being damaged and causing fires, and provide the rare earth high-iron aluminum alloy conductors with sufficient distance and heat dissipation space to reduce the heating rate. At the same time, the extrusion strength of the rare earth high-iron aluminum alloy conductors can be improved, and the compressive strength of the cable can be improved. Through the cooperation of the inner protective layer, the outer protective layer and the sheath, the rare earth high-iron aluminum alloy conductors can be multiple-protected from the inside to the outside, which can avoid damage to the rare earth high-iron aluminum alloy conductors caused by external forces, and effectively extend the service life of the cable. The sheath and the outer protective layer are detachably connected, which is convenient for repairing and replacing the sheath, and improves the protective effect on the cable. Fillers are arranged around the rare earth high-iron aluminum alloy conductors, and the fillers can be used to prevent the rare earth high-iron aluminum alloy conductors from moving at will, improve the stability of the rare earth high-iron aluminum alloy conductors, and at the same time, it can also avoid friction between it and the partition plate, the inner protective layer or the outer protective layer, and improve the safety of the cable when it is used or safe. A number of flame retardant units are arranged between the protective sheath and the outer protective layer. When installing or removing the sheath, the flame retardant units can be easily replaced to ensure the flame retardant effect of the cable, thereby improving the fire resistance of the cable and ensuring that the cable can be used normally at high temperatures. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 A cross-sectional view of a rare earth high iron aluminum alloy fireproof cable provided in Example 1 of the utility model;

[0017] Figure 2 Provided for the utility model embodiment 1 Figure 1 A partial enlarged view of the middle A;

[0018] Figure 3 This is a cross-sectional view of the rare earth high iron aluminum alloy conductor provided in Example 1 of the utility model.

[0019] Icons: 1-inner protective layer, 2-outer protective layer, 3-sheath, 4-partition plate, 5-rare earth high iron aluminum alloy conductor, 6-filler, 7-flame retardant unit, 8-elastomer, 9-ball, 10-slide, 11-arc baffle, 12-explosion-proof layer, 13-fire-resistant layer, 71-shell, 72-flame retardant. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0023] In the description of the present invention, it should be noted that if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the application is usually placed when used. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0024] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] Example 1

[0026] like Figure 1-3 As shown, this embodiment provides a rare earth high-iron aluminum alloy fireproof cable, including an inner protective layer 1, an outer protective layer 2 and a sheath 3 arranged in sequence from the inside to the outside, a plurality of partition plates 4 are arranged between the inner protective layer 1 and the outer protective layer 2, a rare earth high-iron aluminum alloy conductor 5 is arranged between adjacent partition plates 4, a filler 6 is arranged around the rare earth high-iron aluminum alloy conductor 5, the sheath 3 is detachably connected to the outer protective layer 2, and a plurality of flame retardant units 7 are arranged between the sheath 3 and the outer protective layer 2.

[0027] The inner protective layer 1, the outer protective layer 2 and the partition plate 4 cooperate to prevent wear between the rare earth high-iron aluminum alloy conductors 5, avoid the rare earth high-iron aluminum alloy conductors 5 from being damaged and causing fires, and provide the rare earth high-iron aluminum alloy conductors 5 with sufficient distance and heat dissipation space to reduce the heating rate. At the same time, the extrusion strength of the rare earth high-iron aluminum alloy conductors 5 can be increased, and the compressive strength of the cable can be improved. Through the cooperation of the inner protective layer 1, the outer protective layer 2 and the sheath 3, the rare earth high-iron aluminum alloy conductors 5 can be multiple-protected from the inside to the outside, which can prevent the rare earth high-iron aluminum alloy conductors 5 from being damaged by external forces, and effectively extend the service life of the cable. The sheath 3 and the outer protective layer 5 are detachably connected, which is convenient for repairing and replacing the sheath 3, and improves the protection of the cable. A filler 6 is arranged around the rare earth high-iron aluminum alloy conductor 5. The filler 6 can prevent the rare earth high-iron aluminum alloy conductor 5 from moving at will, improve the stability of the rare earth high-iron aluminum alloy conductor 5, and at the same time avoid friction between it and the partition plate 4, the inner protective layer 1 or the outer protective layer 2, thereby improving the safety of the cable during use or safety. A plurality of flame retardant units 7 are arranged between the sheath 3 and the outer protective layer 2. When installing or removing the sheath 3, it is convenient to replace the flame retardant unit 7 to ensure the flame retardant effect of the cable, thereby improving the fire resistance of the cable and ensuring that the cable can be used normally at high temperatures. Among them, a cavity is formed between the sheath 3 and the outer protective layer 2, and the flame retardant unit 7 is placed in the cavity, which facilitates the installation, removal and replacement of the flame retardant unit 7 and improves the fire resistance of the cable.

[0028] In this embodiment, the inner wall of the sheath 3 is connected to a plurality of elastic bodies 8, and the other end of each of the elastic bodies 8 is connected to a ball 9. The outer surface of the outer protective layer 2 is provided with a slide groove 10 corresponding to the ball 9, and the ball 9 slides in the slide groove 10. The flame retardant unit 7 is provided between adjacent slide grooves 10. The sheath 3 and the outer protective layer 2 are connected and fixed by the ball 9 and the slide groove 10, which is convenient for installing and removing the sheath 3. When the sheath 3 is worn, the sheath 3 can be replaced in time to improve the protection of the cable. The flame retardant unit 7 is provided between adjacent slide grooves 10, so that the flame retardant unit 7 can be replaced according to different conditions, which is highly practical.

[0029] In this embodiment, an arc-shaped baffle 11 is provided in the slide groove 10, a through hole is provided on the arc-shaped baffle 11, the elastic body 8 is located in the through hole, and the diameter of the through hole is smaller than the diameter of the ball 9. In this way, the movement of the ball 9 can be limited, and the firmness of the connection between the sheath 3 and the outer protective layer 2 can be improved.

[0030] In this embodiment, the flame retardant unit 7 includes a shell 71 and a flame retardant 72 located in the shell 71. The flame retardant 72 is a halogen-free flame retardant material, which has good flame retardancy. At the same time, under the action of a fire or a fire source, it can extinguish the flame by itself, and has high safety. By placing the flame retardant 72 in the shell 71, it is convenient to replace the flame retardant 72 according to different fire protection requirements, and it is also convenient to replace the flame retardant unit 7, thereby improving the convenience during use. In other embodiments, the flame retardant 72 may also be other substances with flame retardant effects.

[0031] In this embodiment, the shell 71 is a flexible body. When the sheath 3 is squeezed, the sheath 3 applies pressure to the elastic body 8, so that the sheath 3 moves toward the outer protective layer 2, and the sheath 3 is squeezed by external force, so that the sheath 3 squeezes the shell 71 of the flame retardant unit 7, so that the shell 71 is broken, and the release of the flame retardant 72 in the shell 71 is accelerated, so as to achieve the purpose of rapid flame retardancy.

[0032] In this embodiment, the surface of the rare earth high iron aluminum alloy conductor 5 is sequentially provided with an explosion-proof layer 12 and a fire-resistant layer 13, wherein the explosion-proof layer 12 is cross-linked polyethylene, and the fire-resistant layer 13 is a two-layer double-sided mica tape cross-wound and wrapped. By setting the explosion-proof layer 12 and the fire-resistant layer 13, the internal rare earth high iron aluminum alloy conductor 5 can have a sufficient flame retardant effect, and the normal use of the cable can be prevented from being affected by excessive external temperature. In addition, the explosion-proof layer 12, the fire-resistant layer 13 and the flame-retardant unit 7 cooperate to form multiple fire prevention measures, which can further improve the fire resistance of the cable. Cross-linked polyethylene has good insulation properties, large insulation resistance, a very small dielectric loss tangent value, and is less affected by temperature. The cross-wrap of two layers of double-sided mica tape can effectively prevent the mica tape from breaking and leaking, and has a good fire-resistant effect.

[0033] In this embodiment, the filler 6 is a thermoplastic polyester elastomer. Thermoplastic polyester elastomer has excellent heat resistance and certain softness, and can play a flame retardant and protective role on the rare earth high iron aluminum alloy conductor 5, thereby improving the fire resistance and stability of the rare earth high iron aluminum alloy conductor 5.

[0034] The working principle of a rare earth high-iron aluminum alloy fireproof cable is as follows: using an explosion-proof layer 12 and a fire-resistant layer 13 to perform flame retardant protection on a rare earth high-iron aluminum alloy conductor 5 from the inside, and using a filler 6 and a flame retardant unit 7 to perform flame retardant protection on the rare earth high-iron aluminum alloy conductor 5 from the outside, and the fireproof performance of the cable can be effectively improved through multiple flame retardant and fireproof measures; using multiple pressure-resistant measures of an inner protective layer 1, a partition plate 4, an outer protective layer 2 and a sheath 3 to protect the rare earth high-iron aluminum alloy conductor 5 from the inside and outside, the pressure resistance of the cable can be effectively improved, the cable quality can be improved, and the service life of the cable can be extended.

[0035] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A rare earth high iron aluminum alloy fireproof cable, characterized in that: It comprises an inner protective layer, an outer protective layer and a sheath which are arranged in sequence from the inside to the outside, a plurality of partition plates are arranged between the inner protective layer and the outer protective layer, a rare earth high iron aluminum alloy conductor is arranged between adjacent partition plates, a filler is arranged around the rare earth high iron aluminum alloy conductor, the sheath is detachably connected to the outer protective layer, and a plurality of flame retardant units are arranged between the sheath and the outer protective layer.

2. The rare earth high iron aluminum alloy fireproof cable according to claim 1, characterized in that: The inner wall of the sheath is connected to a plurality of elastomers, and the other end of each of the elastomers is connected to a ball. The outer surface of the outer protective layer is provided with slide grooves corresponding to the balls one by one, and the balls slide in the slide grooves. The flame retardant unit is provided between adjacent slide grooves.

3. The rare earth high iron aluminum alloy fireproof cable according to claim 2, characterized in that: An arc-shaped baffle is arranged in the slide groove, a through hole is opened on the arc-shaped baffle, the elastic body is located in the through hole, and the diameter of the through hole is smaller than the diameter of the ball.

4. The rare earth high iron aluminum alloy fireproof cable according to claim 1, characterized in that: The flame retardant unit includes a shell and a flame retardant located in the shell.

5. The rare earth high iron aluminum alloy fireproof cable according to claim 4, characterized in that: The shell is a flexible body.

6. The rare earth high iron aluminum alloy fireproof cable according to claim 1, characterized in that: The surface of the rare earth high iron aluminum alloy conductor is provided with an explosion-proof layer and a fire-resistant layer in sequence, the explosion-proof layer is cross-linked polyethylene, and the fire-resistant layer is two layers of double-sided mica tapes cross-wound and wrapped.

7. The rare earth high iron aluminum alloy fireproof cable according to claim 1, characterized in that: The filler is thermoplastic polyester elastomer.

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