Flame-retardant environment-friendly compression-resistant buffer fireproof cable

Abstract

The utility model relates to the technical field of cables, in particular to a flame-retardant environment-friendly compression-resistant buffer fireproof cable, which comprises a cable core, an insulating layer is wrapped outside the cable core, an elastic framework is sleeved outside the insulating layer, a wrapping layer is sleeved outside the elastic framework, and a lining layer, a shielding layer, a soft anti-corrosion layer and a wear-resistant anti-corrosion layer are respectively sleeved outside the wrapping layer. The elastic framework comprises a telescopic strip and a bearing groove, the insulating layer is sleeved with the bearing groove, and the telescopic strip is arranged in the bearing groove in a sliding mode; one end of the telescopic strip is an arc-shaped head, the other end of the telescopic strip is a step head, the step head on the telescopic strip is connected in the receiving groove in a pluggable mode, and the arc-shaped head on the telescopic strip abuts against the wrapping layer; a double-layer buffering compression-resistant effect is arranged in the elastic framework, the step surface of the telescopic strip firstly extrudes the first elastic cushion, when the pressure is too large, the end surface of the telescopic strip extrudes the second elastic cushion, and the use stability of the cable core is ensured through double-layer compression-resistant buffering.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a flame-retardant and environment-friendly pressure-resistant buffer fireproof cable. Background Art

[0002] Cables are made of one or more mutually insulated conductors and an outer insulating protective layer. They transmit electricity from one place to another. They are usually rope-like cables made of several or several groups of conductors (at least two in each group). Each group of conductors is insulated from each other and often twisted around a center. The entire outer layer is covered with a highly insulating covering. The cable has the characteristics of being powered inside and insulated outside. At present, the outer sheath materials of most cables on the market are plastic or rubber. Due to the particularity of plastic materials, their ability to absorb impact pressure is limited and they cannot play an effective role in compressive buffering. Although rubber can absorb a lot of impact, the impact will be transmitted to the internal wires. When encountering a large impact, local rupture will occur, affecting the service life of the cable.

[0003] In order to solve the above technical problems, Chinese patent CN213339792U discloses a fireproof cable with a pressure-resistant structure, specifically a fireproof cable with a pressure-resistant structure, including a device body, the device body includes a cable body, the surface of the cable body is provided with a pressure-resistant mechanism, the pressure-resistant mechanism includes a waterproof layer, the surface of the cable body is connected with a waterproof layer, the surface of the waterproof layer is evenly fixed with a connecting block, and the interior of the connecting block is fixed with a No. 1 spring. The above patent is provided with a waterproof layer, a connecting block, a No. 1 spring, a fixed block and a pressure-resistant layer, and a waterproof layer and a pressure-resistant layer are provided on the surface of the cable body, and the fixed block and the No. 1 spring are connected to each other. The No. 1 spring can play the role of pressure buffer, so that the waterproof layer and the pressure-resistant layer can increase the pressure resistance of the cable body when they are wrapped on the outside of the cable body, and at the same time reduce the situation where the cable body is damaged by pressure. However, when the above patent encounters a large impact, the pressure will still be transmitted to the internal wire, and local rupture is prone to occur.

[0004] Therefore, it is necessary for technicians in this field to provide a flame-retardant, environmentally friendly, pressure-resistant, buffered, fire-proof cable to reduce the impact on the cable, protect the stability of the internal wires of the cable, and improve the use effect. Utility Model Content

[0005] The utility model aims to provide a flame retardant, environment-friendly, pressure-resistant, buffered and fireproof cable to solve the technical problem in the prior art that when the cable encounters a large impact, the impact will be transmitted to the internal wires, which is prone to local rupture and affects the service life of the cable.

[0006] The utility model adopts the following technical solution to solve the technical problem: a flame-retardant, environment-friendly, pressure-resistant, buffered and fire-proof cable, comprising a cable core, an insulating layer wrapped around the outside of the cable core, an elastic skeleton arranged outside the insulating layer, a winding layer arranged outside the elastic skeleton, an inner lining layer, a shielding layer, a soft anti-corrosion layer and a wear-resistant anti-corrosion layer respectively arranged outside the winding layer; the elastic skeleton comprises a telescopic strip and a receiving groove, the receiving groove is axially sleeved outside the insulating layer along the insulating layer, and the telescopic strip is slidably arranged in the receiving groove; one end of the telescopic strip is an arc-shaped head, and the other end of the telescopic strip is a step head, the step head on the telescopic strip is plug-in connected in the receiving groove, and the arc head on the telescopic strip abuts against the winding layer.

[0007] Furthermore, the step head includes a step surface and an end surface, a first elastic pad is provided in the receiving groove, and the first elastic pad abuts against the step surface of the step head.

[0008] Furthermore, a second elastic pad is provided in the receiving groove, a gap is left between the second elastic pad and the end surface of the step head, and the second elastic pad can abut against the end surface of the step head.

[0009] Furthermore, the first elastic pad is sleeved on the outside of the second elastic pad, and the end surface of the second elastic pad is consistent with the end surface profile of the step head.

[0010] Furthermore, the elastic deformation of the first elastic pad is greater than that of the second elastic pad.

[0011] Furthermore, the elastic skeletons are provided in plurality and are evenly distributed around the cable core, and filling layers are provided between the elastic skeletons.

[0012] Furthermore, the wrapping layer is formed by winding the wrapping wire, and the shielding layer is made by braiding tinned copper.

[0013] Furthermore, the soft anti-corrosion layer is made of soft polyvinyl chloride.

[0014] Furthermore, the lining layer, the shielding layer, the soft anti-corrosion layer and the wear-resistant anti-corrosion layer are coaxially arranged.

[0015] The beneficial effect of the utility model is that the utility model uses an elastic skeleton to provide a compressive buffering effect for the cable core when in use, preventing the pressure from being transmitted to the cable core after the cable is subjected to a large pressure, thereby ensuring the stability of the cable operation. A double-layer buffering compressive effect is set in the elastic skeleton, and the step surface of the telescopic strip first squeezes the first elastic pad, which can effectively provide buffering performance. When the pressure is too large, the end surface of the telescopic strip squeezes the second elastic pad, which can provide a compressive effect for the cable core. The utility model ensures the stability of the cable core through double-layer compressive buffering. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a cross-sectional view of the flame-retardant, environment-friendly, pressure-resistant, buffered and fire-proof cable of the utility model.

[0017] The components in the accompanying drawings are marked as follows: 10, cable core; 11, insulation layer; 14, filling layer; 15, wrapping layer; 16, lining layer; 17, shielding layer; 18, soft anti-corrosion layer; 19, wear-resistant anti-corrosion layer; 20, elastic skeleton; 21, telescopic strip; 22, arc head; 23, first elastic pad; 24, receiving groove; 25, step head; 26, second elastic pad. DETAILED DESCRIPTION

[0018] Now the utility model is described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, which only illustrates the basic structure of the utility model in a schematic manner, so it only shows the components related to the utility model.

[0019] See also Figure 1 The utility model provides a flame retardant, environment-friendly, pressure-resistant, buffered, fireproof cable, comprising a cable core 10, the cable core 10 is made of twisted copper wires, an insulating layer 11 is wrapped outside the twisted cable core 10, and the insulating layer 11 is made of polyethylene.

[0020] The insulating layer 11 is covered with an elastic frame 20 , which includes a telescopic strip 21 and a receiving groove 24 . The receiving groove 24 is sleeved outside the insulating layer 11 along the axial direction of the insulating layer 11 , and the telescopic strip 21 is slidably disposed in the receiving groove 24 .

[0021] Furthermore, one end of the telescopic strip 21 is an arc-shaped head 22 , and the other end of the telescopic strip 21 is a step head 25 . The step head 25 on the telescopic strip 21 is pluggably connected in the receiving groove 24 .

[0022] The end face of the arc head 22 is an arc surface, which is used to increase the contact area of ​​the elastic skeleton 20 to ensure that after the cable is subjected to external force, the elastic skeleton 20 can fully receive the pressure and provide a buffering effect, thereby preventing the pressure from being transmitted to the cable core 10, preventing local rupture and providing a compressive resistance effect.

[0023] The step head 25 includes a step surface and an end surface, a first elastic pad 23 is provided in the receiving groove 24, the first elastic pad 23 abuts on the step surface of the step head 25, and a second elastic pad 26 is further provided in the receiving groove 24, a gap is left between the second elastic pad 26 and the end surface of the step head 25, and the second elastic pad 26 can abut on the end surface of the step head 25. The elastic deformation of the first elastic pad 23 is greater than that of the second elastic pad 26.

[0024] The first elastic pad 23 is sleeved outside the second elastic pad 26, and the end surface of the second elastic pad 26 is consistent with the end surface profile of the step head 25, so as to ensure that the second elastic pad 26 only abuts against the end surface of the step head 25. Preferably, the first elastic pad 23 is made of flame-retardant foam, and preferably, the second elastic pad 26 is made of rubber.

[0025] The utility model provides a compressive buffering effect for the cable core 10 by setting a retractable elastic skeleton 20, preventing the cable from transmitting pressure to the cable core 10 after being subjected to a large pressure, thereby ensuring the stability of the cable operation. When in use, under the push of pressure, the step surface of the telescopic strip 21 first squeezes the first elastic pad 23, and the first elastic pad 23 can effectively provide buffering performance. When the pressure is too large, the end face of the telescopic strip 21 will squeeze the second elastic pad 26, and the second elastic pad 26 can provide a compressive effect for the cable core 10. Compared with the cable with only a single buffer layer or pressure-resistant layer in the prior art, the utility model uses a double-layer pressure-resistant buffer to resist pressure and buffer in layers, reducing the damage to the cable core 10 caused by pressure, while increasing the service life of the first elastic pad 23 and the second elastic pad 26. The pressure on the second elastic pad 26 is the pressure after the first elastic pad 23 has been buffered, thereby greatly reducing the damage to the second elastic pad 26 caused by pressure, thereby ensuring the stability and service life of the cable core 10.

[0026] Furthermore, the elastic skeleton 20 is provided with a wrapping layer 15 on the outer surface, and the wrapping layer 15 is respectively provided with an inner lining layer 16, a shielding layer 17, a soft anti-corrosion layer 18 and a wear-resistant anti-corrosion layer 19. The arc head 22 on the telescopic strip 21 abuts against the wrapping layer 15. The elastic skeleton 20 is provided with a plurality of them and is evenly distributed around the cable core 10, and a filling layer 14 is provided between the elastic skeletons 20, and the wrapping layer 15 wraps the filling layer 14 between two elastic skeletons 20.

[0027] Specifically, the wrapping layer 15 is wound around the elastic skeleton 20 with a wrapping wire, and the filling layer 14 is made of polyethylene. The inner lining layer 16 is made of aluminum foil, and the shielding layer 17 is made of tinned copper braid; the soft anti-corrosion layer 18 is made of soft polyvinyl chloride, and the wear-resistant anti-corrosion layer 19 is extruded from low-smoke halogen-free polyolefin. Preferably, the inner lining layer 16, the shielding layer 17, the soft anti-corrosion layer 18 and the wear-resistant anti-corrosion layer 19 are coaxially arranged.

[0028] When in use, the soft anti-corrosion layer 18 cooperates with the wear-resistant anti-corrosion layer 19, so that the utility model has multiple anti-corrosion effects, while ensuring its wear resistance and bending performance, and improving the convenience of use. The lining layer 16 and the shielding layer 17 are used to prevent the interference signal in the cable from interfering with the surrounding environment and protect the signal in the cable from external interference. At the same time, the wear-resistant anti-corrosion layer 19 is a low-smoke halogen-free polyolefin protective sleeve to prevent the combustion from producing harmful gases, thereby improving the environmental protection level of the utility model.

[0029] The utility model uses the elastic skeleton 20 to provide a compressive buffering effect for the cable core 10 when in use, preventing the pressure from being transmitted to the cable core 10 after the cable is subjected to a large pressure, thereby ensuring the stability of the cable operation. A double-layer buffering compressive effect is set in the elastic skeleton 20. The step surface of the telescopic strip 21 first squeezes the first elastic pad 23, and the first elastic pad 23 can effectively provide buffering performance. When the pressure is too large, the end surface of the telescopic strip 21 squeezes the second elastic pad 26, and the second elastic pad 26 can provide a compressive effect for the cable core 10. The utility model ensures the stability of the cable core 10 through double-layer compressive buffering.

[0030] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A flame retardant, environmentally friendly, pressure-resistant, buffered, fireproof cable, characterized in that: The cable core (10) comprises an insulating layer (11) wrapped around the outside of the cable core (10); an elastic frame (20) is provided on the outer cover of the insulating layer (11); a wrapping layer (15) is provided on the outer cover of the elastic frame (20); an inner lining layer (16), a shielding layer (17), a soft anti-corrosion layer (18) and a wear-resistant anti-corrosion layer (19) are respectively provided on the outer cover of the wrapping layer (15); the elastic frame (20) comprises a telescopic strip (21) and a receiving groove (24); the receiving groove (24) is sleeved outside the insulating layer (11) along the axial direction of the insulating layer (11), and the telescopic strip (21) is slidably arranged in the receiving groove (24); one end of the telescopic strip (21) is an arc head (22), and the other end of the telescopic strip (21) is a step head (25), the step head (25) on the telescopic strip (21) is pluggable and connected in the receiving groove (24), and the arc head (22) on the telescopic strip (21) abuts against the wrapping layer (15).

2. The flame-retardant, environment-friendly, pressure-resistant, buffered, fire-resistant cable according to claim 1, characterized in that: The step head (25) comprises a step surface and an end surface. A first elastic pad (23) is provided in the receiving groove (24), and the first elastic pad (23) abuts against the step surface of the step head (25).

3. The flame-retardant, environment-friendly, pressure-resistant, buffered and fire-proof cable according to claim 2 is characterized in that: A second elastic pad (26) is provided in the receiving groove (24), a gap is left between the second elastic pad (26) and the end surface of the step head (25), and the second elastic pad (26) can abut against the end surface of the step head (25).

4. The flame-retardant, environment-friendly, pressure-resistant, buffered, fire-resistant cable according to claim 3, characterized in that: The first elastic pad (23) is sleeved outside the second elastic pad (26), and the end surface of the second elastic pad (26) has a profile consistent with the end surface of the step head (25).

5. The flame-retardant, environment-friendly, pressure-resistant, buffered, fire-resistant cable according to claim 4, characterized in that: The elastic deformation of the first elastic pad (23) is greater than that of the second elastic pad (26).

6. The flame-retardant, environment-friendly, pressure-resistant, buffered, fire-resistant cable according to claim 1, characterized in that: The elastic skeletons (20) are provided in plurality and are evenly distributed around the cable core (10), and filling layers (14) are provided between the elastic skeletons (20).

7. The flame-retardant, environment-friendly, pressure-resistant, buffered, fire-resistant cable according to claim 1, characterized in that: The wrapping layer (15) is formed by winding a wrapping wire, and the shielding layer (17) is made of tinned copper.

8. The flame-retardant, environment-friendly, pressure-resistant, buffered, fire-resistant cable according to claim 1, characterized in that: The soft anti-corrosion layer (18) is made of soft polyvinyl chloride.

9. The flame-retardant, environment-friendly, pressure-resistant, buffered, fire-resistant cable according to claim 1, characterized in that: The inner lining layer (16), the shielding layer (17), the soft anti-corrosion layer (18) and the wear-resistant anti-corrosion layer (19) are coaxially arranged.

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