Anti-cracking low-voltage power cable

Abstract

The utility model discloses an anti-cracking low-voltage power cable. The anti-cracking low-voltage power cable comprises a lead, an inner sheath layer, a temperature-resistant filler, a first wrapping layer and an outer sheath layer. According to the utility model, the outer sheath layer is arranged on the outer surface of the first wrapping layer, the buffer reinforcing bottom layer, the buffer spring group and the buffer reinforcing top layer are matched, and the buffer spring group buffers the external pressure, so that the influence of the pressure on the cable is reduced, the outer layer of the wire is prevented from cracking or wearing, and the protection strength of the wire is improved; the outer layer of the cable is prevented from being cracked and worn when large pressure is encountered, meanwhile, the first flame-retardant filler is arranged, and the first flame-retardant layer is used for preventing fire diffusion, so that the service life of the cable is prolonged, and the reliability of a circuit is improved.

Description

Technical Field

[0001] The utility model relates to the field of cables, in particular to a crack-resistant low-voltage power cable. Background Art

[0002] Low-voltage cable is a crack-resistant low-voltage power cable used to transmit power or signal current, signal voltage, and is a conductor covered with an insulation layer, a protective layer, a shielding layer, etc. It is mainly composed of three parts: a core, an insulation layer, and a protective layer. The core is used to conduct current and is usually made of multiple copper wires or multiple aluminum wires twisted together. Low-voltage cables play a vital role in power transmission and distribution systems.

[0003] The improvement of low-voltage power cables in the prior art is mostly reflected in improving the safety of cables. For example, the Chinese patent document with the publication number CN207624441U discloses a low-voltage cable, including a cable conductor unit, an optical cable unit, and an optical fiber unit. The cable conductor unit, the optical cable unit, and the optical fiber unit are twisted around a non-metallic reinforcing core to form a cable core. The outside of the cable core and the gap are coated with a filling layer, the outside of the filling layer is coated with a wrapping layer, the outside of the wrapping layer is coated with a shielding layer, the outside of the shielding layer is coated with an outer insulating layer, the outside of the outer insulating layer is coated with a waterproof layer, and the outside of the waterproof layer is coated with a sheath. The overall structure of the utility model is reasonably arranged, integrating optical fiber and power transmission and distribution cables in one, avoiding secondary wiring, and can effectively reduce the cost of construction, network construction, etc.; a non-metallic reinforcing core is arranged in the cable, and tensile fiber or steel wire is arranged in the outer insulating layer as a tensile wire, which can effectively enhance the tensile resistance of the cable; a waterproof layer is arranged to effectively prevent penetration, and it has good practicality.

[0004] The above-mentioned low-voltage cables have certain advantages in terms of safety, but they still have certain shortcomings:

[0005] The outer layer of the conductor core lacks a protective layer that is resistant to cracking and wear, and the protective strength of the outer jacket is low. Although it can provide a certain degree of protection for the cable, it is prone to cracking and wear due to deformation when encountering greater pressure. Utility Model Content

[0006] Therefore, in order to solve the above-mentioned shortcomings, the utility model provides a crack-resistant low-voltage power cable.

[0007] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a crack-resistant low-voltage power cable, comprising a conductor, an inner sheath layer, a temperature-resistant filler, a first winding layer, and an outer sheath layer, wherein the conductor is provided with multiple groups, the outer surfaces of the multiple groups of the conductors are fixedly connected with the inner sheath layer, the outer surface of the inner sheath layer is fixedly connected with the temperature-resistant filler, and the outer surface of the temperature-resistant filler is fixedly connected with the first winding layer; the outer sheath layer is fixedly connected to the outer surface of the first winding layer, and the outer sheath layer comprises a shielding layer, a first flame-retardant filler, a first flame-retardant layer, a buffer reinforcement bottom layer, a buffer spring group, a buffer reinforcement top layer, an insulating filler, a braided layer, a rubber outer layer, a shielding layer, a first flame-retardant filler, a first flame-retardant layer, a buffer reinforcement bottom layer, a buffer spring group, a buffer reinforcement top layer, a insulating filler, a braided layer, a rubber outer layer, a shielding layer, a first flame-retardant filler, a first flame-retardant layer ... The shielding layer is fixed with a first flame-retardant filler on its outer surface, the first flame-retardant filler is fixedly connected with a first flame-retardant layer on its outer surface, the first flame-retardant layer is fixedly connected with a buffer reinforcement bottom layer on its outer surface, a buffer spring group is arranged on the outer surface of the buffer reinforcement bottom layer, the buffer spring group is elastically connected with a buffer reinforcement top layer on its outer surface, the buffer reinforcement bottom layer, the buffer spring group and the buffer reinforcement top layer are arranged in multiple groups, an insulating filler is arranged between each group of the buffer reinforcement bottom layer, the buffer spring group and the buffer reinforcement top layer, the insulating filler is fixedly connected with a braided layer on its outer surface, and the braided layer is fixedly connected with a rubber outer protective layer on its outer surface.

[0008] As a further solution of the utility model, the inner surface of the shielding layer is fixedly connected to the outer surface of the first winding layer. The cable shielding layer is used to protect the cable itself from interference from the electromagnetic field, and can also play a grounding protection role when the cable is damaged, thereby ensuring the safe operation of the cable.

[0009] As a further solution of the utility model, the outer surface of the buffer reinforcement top layer is fixedly connected to the inner surface of the braided layer.

[0010] As a further solution of the utility model, the inner sheath layer includes a second flame retardant filler and a second flame retardant layer. The outer surface of the second flame retardant filler is fixedly connected to the second flame retardant layer. The second flame retardant layer and the second flame retardant filler are arranged to prevent the spread of fire, extend the service life of the cable itself, and improve the reliability of the line.

[0011] As a further solution of the present invention, the second flame retardant filler is fixedly connected to the outer surface of the wire.

[0012] As a further solution of the utility model, an insulating layer is fixedly connected to the outer surface of the wire, and the function of the insulating layer is to ensure that the conductor in the cable is insulated from the surrounding environment or adjacent conductors.

[0013] As a further solution of the utility model, the outer surface of the insulating layer is fixedly connected to the inner surface of the second flame retardant layer.

[0014] The first flame retardant filler is preferably XLEP flame retardant material, which has excellent heat resistance and electrical properties and is a common flame retardant material. Its use can further improve the flame retardant performance of the cable and ensure the safe operation of the cable in harsh environments.

[0015] The first flame retardant layer preferably uses PVC flame retardant material. PVC flame retardant material is a commonly used flame retardant material. It has good flame retardant properties and chemical resistance and is one of the most widely used materials on the market. In cables, PVC flame retardant material can effectively improve the flame retardant properties of cables and prevent the spread of fire.

[0016] The insulating filler is preferably a mineral insulating material, which is usually made of graphite, talc, magnesium oxide, aluminum oxide and other minerals after special treatment. It has good fire resistance, heat resistance and chemical resistance, and is suitable for high-temperature cables, fire emergency systems and high-demand electrical equipment.

[0017] The braided layer is preferably made of aluminum-magnesium wire, which is often used to repair mechanical equipment, such as marine wires and cables. It can also play the role of electromagnetic field shielding and withstand vertical breaking force, such as cables used for deep-sea geological exploration.

[0018] Compared with the prior art, the utility model provides a crack-resistant low-voltage power cable, which has the following beneficial effects:

[0019] In the utility model, an outer sheath layer is arranged on the outer surface of the first winding layer, and the cooperation between the buffer reinforcement bottom layer, the buffer spring group and the buffer reinforcement top layer is utilized. The buffer spring group buffers the external pressure, thereby reducing the influence of the pressure on the cable itself, avoiding cracking or abrasion of the outer layer of the conductor, improving the protection strength of the conductor, and avoiding cracking and abrasion of the outer layer of the cable when encountering greater pressure. At the same time, the first flame-retardant filler and the first flame-retardant layer are arranged to prevent the spread of fire, extend the service life of the cable itself, and improve the reliability of the line. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0021] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model;

[0022] Figure 3 It is a schematic diagram of the cross-sectional structure of the outer sheath layer of the utility model;

[0023] Figure 4 It is a schematic diagram of the cross-sectional structure of the sheath layer in the junction of the utility model;

[0024] Figure 5 It is a schematic diagram of the cross-sectional structure of the wire of the utility model.

[0025] Among them: wire-1, insulation layer-11, inner sheath layer-2, second flame retardant filler-21, second flame retardant layer-22, temperature resistant filler-3, first winding layer-4, outer sheath layer-5, shielding layer-51, first flame retardant filler-52, first flame retardant layer-53, buffer reinforcement bottom layer-54, buffer spring group-55, buffer reinforcement top layer-56, insulation filler-57, braided layer-58, rubber outer sheath-59. DETAILED DESCRIPTION

[0026] In order to further explain the technical solution of the present utility model, it is described in detail through specific embodiments below.

[0027] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do 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 should not be understood as a limitation on the present invention.

[0028] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0029] See also Figure 1-2 In the present utility model embodiment:

[0030] A crack-resistant low-voltage power cable comprises a conductor 1, an inner sheath layer 2, a temperature-resistant filler 3, and a first winding layer 4. The conductor 1 is provided in multiple groups, and the outer surfaces of the multiple groups of conductors 1 are fixedly connected with the inner sheath layer 2, the outer surface of the inner sheath layer 2 is fixedly connected with the temperature-resistant filler 3, and the outer surface of the temperature-resistant filler 3 is fixedly connected with the first winding layer 4.

[0031] See also Figure 3In the embodiment of the utility model: it also includes an outer sheath layer 5, the outer sheath layer 5 is fixedly connected to the outer surface of the first winding layer 4, the outer sheath layer 5 includes a shielding layer 51, a first flame retardant filler 52, a first flame retardant layer 53, a buffer reinforcement bottom layer 54, a buffer spring group 55, a buffer reinforcement top layer 56, an insulating filler 57, a braided layer 58, and a rubber outer sheath 59. The outer surface of the shielding layer 51 is fixed with the first flame retardant filler 52, and the outer surface of the first flame retardant filler is fixedly connected with the first flame retardant layer 53. The outer surface of the first flame retardant layer 53 A buffer reinforcement bottom layer 54 is fixedly connected, and a buffer spring group 55 is arranged on the outer surface of the buffer reinforcement bottom layer 54. A buffer reinforcement top layer 56 is elastically connected to the outer surface of the buffer spring group 55. There are multiple groups of the buffer reinforcement bottom layer 54, the buffer spring group 55 and the buffer reinforcement top layer 56. An insulating filler 57 is arranged between each group of the buffer reinforcement bottom layer 54, the buffer spring group 55 and the buffer reinforcement top layer 56. A braided layer 58 is fixedly connected to the outer surface of the braided layer 58. A rubber outer sheath 59 is fixedly connected to the outer surface of the braided layer 58.

[0032] See also Figure 1-3 In an embodiment of the utility model: the inner surface of the shielding layer 51 is fixedly connected to the outer surface of the first winding layer 4. The cable shielding layer 51 is used to protect the cable itself from interference from the electromagnetic field, and can also play a grounding protection role when the cable is damaged, thereby ensuring the safe operation of the cable.

[0033] See also Figure 1-3 In the embodiment of the utility model, the outer surface of the buffer reinforcement top layer 56 is fixedly connected to the inner surface of the braided layer 58 .

[0034] See also Figure 4 In an embodiment of the utility model: the inner sheath layer 2 includes a second flame retardant filler and a second flame retardant layer, the outer surface of the second flame retardant filler is fixedly connected with the second flame retardant layer, and the second flame retardant layer and the second flame retardant filler are arranged to prevent the spread of fire, extend the service life of the cable itself, and improve the reliability of the line.

[0035] See also Figure 1-4 In an embodiment of the utility model: the second flame retardant filler is fixedly connected to the outer surface of the wire 1.

[0036] See also Figure 5 In the embodiment of the utility model: the outer surface of the conductor 1 is fixedly connected with an insulating layer, and the function of the insulating layer is to ensure that the conductor in the cable is insulated from the surrounding environment or adjacent conductors.

[0037] See also Figure 1-5In an embodiment of the utility model: the outer surface of the insulating layer is fixedly connected to the inner surface of the second flame retardant layer.

[0038] The first flame retardant filler 52 is preferably made of XLEP flame retardant material, which has excellent heat resistance and electrical properties and is a common flame retardant material. Its use can further improve the flame retardant performance of the cable and ensure the safe operation of the cable in harsh environments.

[0039] The first flame retardant layer 53 is preferably made of PVC flame retardant material. PVC flame retardant material is a commonly used flame retardant material. It has good flame retardant properties and chemical resistance and is one of the most widely used materials on the market. In cables, PVC flame retardant material can effectively improve the flame retardant properties of cables and prevent the spread of fire.

[0040] The insulating filler 57 is preferably made of mineral insulating material, which is usually made of graphite, talc, magnesium oxide, aluminum oxide and other minerals after special treatment. It has good fire resistance, heat resistance and chemical resistance, and is suitable for high-temperature cables, fire emergency systems and high-demand electrical equipment.

[0041] The braided layer 58 is preferably made of aluminum-magnesium wire, which is often used to repair mechanical equipment, such as marine wires and cables. It can also play the role of electromagnetic field shielding and withstand vertical breaking force, such as cables used for deep-sea geological exploration.

[0042] The working principle is as follows: when the anti-cracking low-voltage cable is in use, the insulating layer and the inner sheath layer 2 are provided to effectively protect the conductor 1 inside the cable, the first winding layer 4 is provided to provide the first layer of protection to the inside of the cable, and the outer sheath layer 5 is provided to provide the second layer of protection to the inside of the cable;

[0043] At the same time, by arranging a shielding layer 51, a first flame retardant filler 52, a first flame retardant layer 53, an insulating filler 57, a braided layer 58 and a rubber outer sheath 59 inside the outer sheath layer 5, effective protection is provided for the second layer of protection inside the cable. At the same time, by using the cooperation between the buffer reinforcement bottom layer 54, the buffer spring group 55 and the buffer reinforcement top layer 56, the buffer spring group 55 buffers the external pressure, thereby reducing the influence of the pressure on the cable itself and avoiding cracking or wear of the outer layer of the conductor 1.

[0044] Compared with the prior art, the utility model provides a crack-resistant low-voltage power cable, which has the following beneficial effects:

[0045] In the utility model, an outer sheath layer 5 is arranged on the outer surface of the first winding layer 4, and the cooperation between the buffer reinforcement bottom layer 54, the buffer spring group 55, and the buffer reinforcement top layer 56 is utilized. The buffer spring group 55 buffers the external pressure, thereby reducing the influence of the pressure on the cable itself, avoiding the cracking or abrasion of the outer layer of the conductor 1, improving the protection strength of the conductor 1, and avoiding the cracking and abrasion of the outer layer of the cable when encountering greater pressure. At the same time, the first flame retardant filler 52 and the first flame retardant layer 53 are arranged to prevent the spread of fire, extend the service life of the cable itself, and improve the reliability of the line.

[0046] The control method of the present invention is to control by manually starting and closing the switch. The wiring diagram of the power element and the provision of power supply are common knowledge in the field, and the present invention is mainly used to protect mechanical devices, so the present invention will not explain the control method and wiring arrangement in detail.

[0047] The control method of the present invention is automatic control through a controller. The control circuit of the controller can be realized by simple programming by technicians in this field. The provision of power is also common knowledge in this field. The present invention is mainly used to protect mechanical devices, so the present invention will no longer explain the control method and circuit connection in detail.

[0048] The above description is only a preferred example of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A crack-resistant low-voltage power cable, comprising a conductor (1), an inner sheath layer (2), a temperature-resistant filler (3), and a first winding layer (4), wherein the conductor (1) is provided in a plurality of groups, the outer surfaces of the plurality of groups of conductors (1) are fixedly connected to the inner sheath layer (2), the outer surface of the inner sheath layer (2) is fixedly connected to the temperature-resistant filler (3), and the outer surface of the temperature-resistant filler (3) is fixedly connected to the first winding layer (4); Features: It also includes an outer sheath layer (5), which is fixedly connected to the outer surface of the first winding layer (4), and the outer sheath layer (5) includes a shielding layer (51), a first flame retardant filler (52), a first flame retardant layer (53), a buffer reinforcement bottom layer (54), a buffer spring group (55), a buffer reinforcement top layer (56), an insulating filler (57), a braided layer (58), and a rubber outer sheath (59). The outer surface of the shielding layer (51) is fixedly connected to the first flame retardant filler (52), and the outer surface of the first flame retardant filler (52) is fixedly connected to the first flame retardant layer (53).

2. A crack-resistant low-voltage power cable according to claim 1, characterized in that: The outer surface of the first flame retardant layer (53) is fixedly connected to a buffer reinforcement bottom layer (54), the outer surface of the buffer reinforcement bottom layer (54) is provided with a buffer spring group (55), the outer surface of the buffer spring group (55) is elastically connected to a buffer reinforcement top layer (56), the buffer reinforcement bottom layer (54), the buffer spring group (55) and the buffer reinforcement top layer (56) are provided in multiple groups, and an insulating filler (57) is provided between each group of the buffer reinforcement bottom layer (54), the buffer spring group (55) and the buffer reinforcement top layer (56), the outer surface of the insulating filler (57) is fixedly connected to a braided layer (58), the outer surface of the braided layer (58) is fixedly connected to a rubber outer sheath (59), and the inner surface of the shielding layer (51) is fixedly connected to the outer surface of the first winding layer (4).

3. A crack-resistant low-voltage power cable according to claim 1, characterized in that: The outer surface of the buffer reinforcement top layer (56) is fixedly connected to the inner surface of the braided layer (58).

4. A crack-resistant low-voltage power cable according to claim 1, characterized in that: The inner jacket layer (2) comprises a second flame retardant filler (21) and a second flame retardant layer (22), and the second flame retardant layer (22) is fixedly connected to the outer surface of the second flame retardant filler (21).

5. A crack-resistant low-voltage power cable according to claim 4, characterized in that: The second flame retardant filler (21) is fixedly connected to the outer surface of the wire (1).

6. A crack-resistant low-voltage power cable according to claim 1, characterized in that: An insulating layer (11) is fixedly connected to the outer surface of the wire (1).

7. A crack-resistant low-voltage power cable according to claim 6, characterized in that: The outer surface of the insulating layer (11) is fixedly connected to the inner surface of the second flame retardant layer (22).

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