High temperature resistant and impact resistant cable jacket structure

Abstract

The utility model relates to cable technical field, concretely relates to a kind of high-temperature-resistant impact-resistant cable outer covering structure, including by outside to inside sequentially arranged outer wear layer, anti-impact buffer layer, heat insulation layer and inner protective layer;The outer wear layer is wrapped in the outside of anti-impact buffer layer, the heat insulation layer is arranged between anti-impact buffer layer and inner protective layer, and the inner protective layer is tightly wrapped the outer portion of cable wire;The outer wear layer is provided with semicircular arc limit slot on its inner wall along ring core symmetry formula;The anti-impact buffer layer includes four groups of steel leather ring and four groups of buffer leather column, by the composite structure of aerogel felt layer and buffer sponge layer using heat insulation layer, aerogel felt has very low thermal conductivity, can effectively block heat transfer under high-temperature environment, and buffer sponge layer further enhances the heat insulation effect, cooperates buffer transition cavity and buffer filling body, reduces the influence of heat on inner protective layer and wire, so that cable can be stably operated under high-temperature environment.

Description

Technical Field

[0001] This utility model relates to the field of cable technology, and in particular to a high-temperature resistant and impact-resistant cable outer sheath structure. Background Technology

[0002] Cables are widely used in many fields. In some special working environments, such as high-temperature industrial sites and automobile engine compartments, cables need to withstand high temperatures and external impacts.

[0003] Currently, most cable sheaths are made of a single material, such as polyvinyl chloride (PVC) or ordinary rubber. However, these materials are prone to softening, deformation, or even decomposition under high temperatures, leading to a decrease in cable insulation performance and potential safety hazards such as short circuits and leakage. When subjected to mechanical impact, the sheath is unable to effectively disperse and absorb the impact force, and the internal conductors are prone to breakage and damage due to stress, which in turn affects the normal use of the cable and may even cause equipment failure and safety accidents. In addition, the connection method between the layers of the existing cable sheath is relatively simple, which can easily lead to delamination and detachment in complex environments, further reducing the reliability and service life of the cable.

[0004] Therefore, we provide a high-temperature resistant and impact-resistant cable sheath structure. Utility Model Content

[0005] The purpose of this utility model is to address the aforementioned technical problems by providing a high-temperature resistant and impact-resistant cable sheath structure. Through a multi-layer structure design and the connection method between each layer, the cable's protective performance under high temperature and impact environments is significantly improved, ensuring the safety and stability of the internal conductors and extending the cable's service life.

[0006] In view of this, the present invention provides a high-temperature resistant and impact-resistant cable outer sheath structure, comprising an outer abrasion-resistant layer, an impact-absorbing layer, a heat insulation layer and an inner protective layer arranged sequentially from the outside to the inside;

[0007] The outer wear-resistant layer is wrapped around the outside of the impact-absorbing layer, the heat insulation layer is disposed between the impact-absorbing layer and the inner protective layer, and the inner protective layer tightly wraps the outside of the cable conductor.

[0008] The outer wear-resistant layer is provided with a semi-circular arc-shaped limiting groove on its inner wall in a symmetrical manner along the ring center;

[0009] The impact-resistant buffer layer includes four sets of steel rings and four sets of buffer pillars. The four sets of buffer pillars respectively fit into the semi-circular arc-shaped limiting grooves on the inner wall of the outer wear-resistant layer, and the four sets of steel rings are tightly fitted to the inner wall of the outer wear-resistant layer.

[0010] Preferably, the outer wall of the heat insulation layer has four sets of semi-circular grooves evenly distributed, the size of which is adapted to the four sets of buffer pillars of the impact buffer layer, and the two are tightly fitted together.

[0011] Preferably, a buffer transition cavity is formed between the heat insulation layer and the inner protective layer.

[0012] Preferably, a buffer filler is provided between the heat insulation layer and the inner protective layer, and the buffer filler is embedded in the buffer transition cavity formed between the heat insulation layer and the inner protective layer.

[0013] Preferably, the inner wall of the inner protective layer is provided with a plurality of protruding structures, and the plurality of protruding structures are arranged in a ring array around the inner protective layer.

[0014] Preferably, the heat insulation layer includes an aerogel felt layer and a cushioning sponge layer, the aerogel felt layer is disposed on the outside of the inner protective layer, and the aerogel felt layer and the cushioning sponge layer are bonded and fixed together by a high-temperature resistant adhesive.

[0015] Preferably, the inner protective layer is wrapped around the outside of the cable conductor by an extrusion molding process, and the outer abrasion-resistant layer is wrapped around the outside of the heat insulation layer by a braiding process.

[0016] Compared with the prior art, this utility model provides a high-temperature resistant and impact-resistant cable sheath structure, which has the following beneficial effects:

[0017] 1. This utility model adopts a composite structure of aerogel felt layer and buffer sponge layer for heat insulation layer. Aerogel felt has an extremely low thermal conductivity, which can effectively block heat transfer in high temperature environment. The buffer sponge layer further enhances the heat insulation effect. Together with buffer transition cavity and buffer filler, it reduces the impact of heat on inner protective layer and conductor, so that the cable can operate stably in high temperature environment.

[0018] 2. This utility model, through the stable interlocking structure formed between the steel ring and buffer post in the impact buffer layer and the outer wear-resistant layer and heat insulation layer, can effectively disperse and absorb the impact force when subjected to external impact. The protruding structure on the inner wall of the inner protective layer can also play a buffering and protective role for the conductor. The combined effect of multiple protective structures greatly improves the cable's ability to resist mechanical impact and reduces the risk of conductor damage.

[0019] 3. This utility model achieves a tight connection and fit between the outer wear-resistant layer, impact-absorbing layer, heat insulation layer and inner protective layer through structures such as limiting grooves, semi-circular grooves and buffer fillers. The layers are not prone to delamination or detachment, ensuring that the cable outer sheath structure remains stable in complex environments for a long time and extending the service life of the cable.

[0020] The parts of this device not covered herein are the same as or can be implemented using existing technologies. This utility model has a simple structure and is easy to operate. Attached Figure Description

[0021] Figure 1This is the overall view of the present utility model;

[0022] Figure 2 This is a schematic diagram of the installation structure of the impact buffer layer proposed in this utility model;

[0023] Figure 3 This is a schematic diagram of the installation of the heat insulation layer and buffer filler proposed in this utility model;

[0024] Figure 4 This is a schematic diagram of the installation of the inner protective layer proposed in this utility model.

[0025] In the diagram: 1. Outer wear-resistant layer; 11. Semi-circular arc-shaped limiting groove; 2. Impact-resistant buffer layer; 21. Steel ring; 22. Buffer pillar; 3. Heat insulation layer; 31. Semi-circular groove; 32. Buffer transition cavity; 4. Buffer filler; 5. Inner protective layer; 51. Protruding structure. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Example:

[0028] Please see Figure 1 - Figure 4 This embodiment of a high-temperature resistant and impact-resistant cable outer sheath structure includes: an outer abrasion-resistant layer 1, an impact-absorbing layer 2, a heat insulation layer 3, and an inner protective layer 5 arranged sequentially from the outside to the inside; the outer abrasion-resistant layer 1 wraps around the outside of the impact-absorbing layer 2, the heat insulation layer 3 is disposed between the impact-absorbing layer 2 and the inner protective layer 5, and the inner protective layer 5 tightly wraps around the outside of the cable conductor; the outer abrasion-resistant layer 1 has a semi-circular arc-shaped limiting groove 11 symmetrically arranged on its inner wall along the annulus; the impact-absorbing layer 2 includes four sets of steel rings 21 and four sets of buffer posts 22, the four sets of buffer posts 22 respectively fit into the semi-circular arc-shaped limiting groove 11 on the inner wall of the outer abrasion-resistant layer 1, and the four sets of steel rings 21 are tightly fitted to the inner wall of the outer abrasion-resistant layer 1.

[0029] The design of the semi-circular arc-shaped limiting groove 11 on the inner wall of the outer wear-resistant layer 1 and the buffer pillar 22 in the impact buffer layer 2, combined with the steel ring 21 that fits tightly against the inner wall of the outer wear-resistant layer 1, forms a three-dimensional buffer structure. When the cable is subjected to external impact, the buffer pillar 22 can undergo a certain displacement deformation within the semi-circular arc-shaped limiting groove 11 to absorb and disperse the impact force, while the steel ring 21 provides rigid support to prevent excessive deformation of the impact buffer layer 2. Through double protection, the internal conductors are effectively prevented from being damaged by impact, greatly improving the reliability of the cable in complex environments.

[0030] Among them, the semi-circular groove 31 on the outer wall of the heat insulation layer 3 is closely fitted with the buffer pillar 22 of the impact buffer layer 2, which further enhances the connection strength and stability between the layers, ensuring that the heat insulation layer 3 can effectively perform its heat insulation function while buffering the impact. At the same time, the buffer transition cavity 32 and the buffer filler 4 between the heat insulation layer 3 and the inner protective layer 5 can absorb the stress generated between the layers due to temperature changes or external forces, avoiding stress concentration that could damage the internal conductors, thus achieving synergistic optimization of impact resistance and heat insulation functions.

[0031] Among them, four sets of semi-circular grooves 31 are evenly distributed on the outer wall of the heat insulation layer 3. Their size is adapted to the four sets of buffer pillars 22 of the impact buffer layer 2, and the two are closely fitted.

[0032] The inner wall of the inner protective layer 5 is provided with several sets of protruding structures 51. The several sets of protruding structures 51 are arranged in a ring array within the inner protective layer 5. Through the ring array arrangement of the inner protective layer 5 with the protruding structures 51, multiple points of support are formed on the outside of the conductor. By increasing the contact friction, the conductor is prevented from shifting due to vibration or external force during long-term use.

[0033] The heat insulation layer 3 includes an aerogel felt layer and a buffer sponge layer. The aerogel felt layer is disposed on the outside of the inner protective layer 5, and the aerogel felt layer and the buffer sponge layer are bonded and fixed together by a high-temperature resistant adhesive.

[0034] Among them, the aerogel felt layer has an extremely low thermal conductivity, which can effectively block the external high temperature from being transferred into the cable and also significantly reduce the heat conduction efficiency, preventing the insulation layer of the internal conductors from aging and degrading due to high temperature, thus ensuring the stable operation of the cable in high-temperature scenarios. At the same time, both aerogel felt and cushioning sponge are lightweight materials, which, compared with traditional heavy heat insulation and cushioning materials, effectively reduce the overall weight of the cable while meeting the high-performance protection requirements.

[0035] The inner protective layer 5 is wrapped around the outside of the cable conductor by an extrusion molding process, and the outer wear-resistant layer 1 is wrapped around the outside of the heat insulation layer 3 by a braiding process. By using an extrusion molding process to wrap the inner protective layer 5, the material can be tightly and uniformly bonded to the conductor, ensuring that the thickness of the inner protective layer 5 is consistent and avoiding the decrease in insulation performance due to local thinning. At the same time, the continuous flow characteristics of the material during the extrusion process allow the raised structure 51 on the inner wall of the inner protective layer 5 to be formed completely and stably, effectively enhancing the fixing and buffering effect on the conductor.

[0036] The installation, connection, or setting methods disclosed in this embodiment are all common mechanical connection methods. As long as they can achieve their beneficial effects, they can be implemented. Therefore, this embodiment will not elaborate on their specific structural composition and working principle.

[0037] Although 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 alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-temperature resistant and impact-resistant cable sheath structure, characterized in that, include: The outer wear-resistant layer (1), the impact-absorbing layer (2), the heat insulation layer (3), and the inner protective layer (5) are arranged sequentially from the outside to the inside. The outer wear-resistant layer (1) is wrapped around the outside of the impact-absorbing layer (2), the heat insulation layer (3) is disposed between the impact-absorbing layer (2) and the inner protective layer (5), and the inner protective layer (5) tightly wraps the outside of the cable conductor; The outer wear-resistant layer (1) has a semi-circular arc-shaped limiting groove (11) symmetrically arranged on its inner wall along the annulus; The impact buffer layer (2) includes four sets of steel rings (21) and four sets of buffer pillars (22). The four sets of buffer pillars (22) are respectively matched with the semi-circular arc-shaped limiting grooves (11) on the inner wall of the outer wear-resistant layer (1), and the four sets of steel rings (21) are just tightly fitted to the inner wall of the outer wear-resistant layer (1).

2. The high-temperature resistant and impact-resistant cable sheath structure according to claim 1, characterized in that, The outer wall of the heat insulation layer (3) has four sets of semi-circular grooves (31) evenly distributed, the size of which is adapted to the four sets of buffer pillars (22) of the impact buffer layer (2), and the two are closely fitted.

3. The high-temperature resistant and impact-resistant cable sheath structure according to claim 2, characterized in that, A buffer transition cavity (32) is formed between the heat insulation layer (3) and the inner protective layer (5).

4. The high-temperature resistant and impact-resistant cable sheath structure according to claim 3, characterized in that, A buffer filler (4) is provided between the heat insulation layer (3) and the inner protective layer (5), and the buffer filler (4) is embedded in the buffer transition cavity (32) formed between the heat insulation layer (3) and the inner protective layer (5).

5. The high-temperature resistant and impact-resistant cable sheath structure according to claim 4, characterized in that, The inner wall of the inner protective layer (5) is provided with several sets of protruding structures (51), and the several sets of protruding structures (51) are arranged in a ring array around the inner protective layer (5).

6. The high-temperature resistant and impact-resistant cable sheath structure according to claim 4, characterized in that, The heat insulation layer (3) includes an aerogel felt layer and a buffer sponge layer, which are bonded and fixed together by a high-temperature resistant adhesive.

7. The high-temperature resistant and impact-resistant cable sheath structure according to claim 1, characterized in that, The inner protective layer (5) is wrapped around the outside of the cable conductor by an extrusion molding process, and the outer wear-resistant layer (1) is wrapped around the outside of the heat insulation layer (3) by a braiding process.

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