Ceramic composite rubber cable for urban public facilities
By designing the inner core, sheath, insulation layer, and ceramicized layer of the composite rubber cable, the problem of external aging of the cable is solved, and protection against mechanical wear and fire is achieved, ensuring the stability and fire resistance of the internal structure of the cable.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-31
- Publication Date
- 2026-03-17
AI Technical Summary
During long-term use, the external structure of urban public facility cables ages, leading to a decrease in the performance or failure of internal materials.
It adopts a composite structure design of inner core, sheath layer, insulation layer and ceramic layer, including inner and outer sandwich, honeycomb layer, inner and outer protective layer and heat insulation part. It uses expansion material to form a dense ceramic layer to resist mechanical wear and fire damage and reduce heat conduction.
It effectively prevents cracking and aging of the cable outer layer, enhances fire resistance, maintains the stability of internal materials, reduces thermal conductivity, and ensures the stability and safety of cable performance.
Smart Images
Figure CN224005684U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of cable technology, and in particular relates to a ceramicized composite rubber cable for urban public facilities. Background Technology
[0002] Urban public facility cables are specialized cable systems that provide power and communication services for urban infrastructure. They are used to transmit electrical energy and cover high-voltage, medium-voltage, and low-voltage cables. They provide power support for urban roads, bridges, tunnels, and other facilities. Their core functions include power transmission, signal control, and communication assurance.
[0003] Currently, during long-term use, the external structure of cables will age, causing the internal materials to be affected by external factors, resulting in reduced performance or even failure.
[0004] To address the aforementioned issues, this application proposes a ceramicized composite rubber cable for urban public facilities. Utility Model Content
[0005] The purpose of this utility model is to provide a ceramicized composite rubber cable for urban public facilities, which solves the problems mentioned in the background art.
[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:
[0007] This utility model is a ceramicized composite rubber cable for urban public facilities, including an inner core, which is composed of a conductor core and a filling layer;
[0008] Sheath layer: Located in the outermost area of the inner core, it has an inner and outer double layer sandwiched between adjacent layers, with a honeycomb layer between them;
[0009] Insulation layer: Located inside the sheath layer, it has an inner layer to fill the gaps and form a dense layer;
[0010] Ceramicized layer: Located between the inner core and the insulating layer, it consists of an inner support layer, a corrugated layer, and an outer support layer from the inside out. The corrugated layer has a corrugated structure to form support. The inner support layer is attached to the inner core to promote heat dissipation. The outer support layer is attached to the inner layer to form an internal and external structural isolation.
[0011] Furthermore, the sheath layer has an inner protective layer and an outer protective layer with inner and outer layers, and adjacent interlayers are installed between the outer protective layer and the inner protective layer.
[0012] Furthermore, the insulating layer has a middle layer and an outer layer inside, which are distributed sequentially on the outside of the inner layer.
[0013] Furthermore, the inner layer is low-expansion glass microspheres, the middle layer is medium-expansion vermiculite powder, and the outer layer is high-expansion graphite sheet.
[0014] Furthermore, a heat-insulating part is provided on the outer side of the inner support layer, located on the inner wall of the corrugated layer crest, to slow down the heat transferred inward.
[0015] Furthermore, a support portion is provided on the outer side of the inner support layer, located on the inner wall of the trough of the corrugated layer, and the arc-shaped structure increases the heat dissipation area of the inner core.
[0016] Furthermore, the inner side of the outer support layer is provided with a heat-resistant part, which is attached to the outer wall of the corrugated layer to increase the contact surface.
[0017] This utility model has the following beneficial effects:
[0018] This invention, by adding interlayer and honeycomb layer, can resist mechanical wear in the outer area of the cable, effectively prevent random cracking and aging of the outer material, ensure that the internal material is not affected by external factors, and maintain stable performance.
[0019] This invention protects the insulation layer with a sheath layer, allowing it to expand outwards in layers during a fire, filling gaps and forming a dense ceramic layer. Compared to a uniform filling method, this reduces the porosity of the ceramic layer and enhances its resistance to flames.
[0020] After forming a dense ceramic layer, this invention provides structural support to the inner ring area through the ceramicized layer, and uses a heat-insulating part to slow down the heat transfer to the innermost area, thereby reducing the heat conduction performance from the outside to the inside and protecting the stable operation of the inner core.
[0021] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description
[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0023] Figure 1 This is a schematic diagram of the external structure of the cable end of this utility model;
[0024] Figure 2 This is a schematic diagram of the layered appearance structure of the cable end of this utility model;
[0025] Figure 3 This is a schematic diagram of the cable cross-section structure of this utility model;
[0026] Figure 4This is a schematic diagram of the ceramicized layer and its partially enlarged structure of the present invention;
[0027] The attached diagram lists the components represented by each number as follows:
[0028] In the picture:
[0029] 1. Inner core; 2. Sheath layer; 3. Insulation layer; 4. Ceramicized layer;
[0030] 11. Conductor core; 12. Filler layer;
[0031] 21. Outer protective layer; 22. Inner protective layer; 23. Interlayer; 24. Honeycomb layer;
[0032] 31. Inner layer; 32. Middle layer; 33. Outer layer;
[0033] 41. Inner support layer; 42. Outer support layer; 43. Corrugated layer
[0034] 411. Heat-insulating part; 412. Support part; 421. Heat-resistant part. Detailed Implementation
[0035] 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.
[0036] In the description of this utility model, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around" and other terms indicating orientation or positional relationship are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0037] Please see Figure 1-4 As shown, this utility model is a ceramicized composite rubber cable for urban public facilities, which consists of four parts, from the inside to the outside: inner core 1, ceramicized layer 4, insulation layer 3 and sheath layer 2. The inner core 1 is composed of conductor 11 and filling layer 12.
[0038] Sheath layer 2: Located in the outermost area of the inner core 1, it has an inner and outer double layer 23. The two layers 23 are made of highly elastic rubber sheets. A honeycomb layer 24 is provided between adjacent layers 23, which is filled with expanded graphite. After expanding when exposed to fire, it seals the pores.
[0039] Insulation layer 3: Located inside the sheath layer 2, it adopts a layered expansion structure, with an inner layer 31, a middle layer 32 and an outer layer 33, which expand and fill the gaps from the outside to the inside to form a dense layer.
[0040] Ceramicized layer 4: Located between the inner core 1 and the insulating layer 3, it consists of an inner support layer 41, a corrugated layer 43, and an outer support layer 42 arranged sequentially from the inside to the outside. The corrugated layer 43 has a corrugated structure to form support. The inner support layer 41 is made of thermally conductive rubber and is attached to the outer surface of the inner core 1 to promote heat dissipation. The outer support layer 42 is attached to the inner layer 31 to form an internal and external structural isolation, so that when the external material fails due to fire, the internal structure remains stable, forming a secondary protection effect.
[0041] The sheath layer 2 has an inner protective layer 22 and an outer protective layer 21 with inner and outer layers. The protective layer 22 is ceramicized silicone rubber, which forms a ceramic hard shell at high temperature. The outer protective layer 21 is weather-resistant nitrile rubber. The adjacent interlayer 23 is installed between the outer protective layer 21 and the inner protective layer 22.
[0042] The inner layer 31 is a composite of low-expansion glass microspheres and silicone rubber with an expansion rate of ≤5%; the middle layer 32 is a composite layer of medium-expansion vermiculite powder with an expansion rate of 8% to 12%; and the outer layer 33 is a composite layer of high-expansion graphite sheets with an expansion rate of ≥15%.
[0043] Among them, the outer side of the inner support layer 41 is provided with a heat-insulating part 411, which is located on the inner wall of the crest of the corrugated layer 43. It is made of thick aerogel tape and is the first part of the inner structure to come into contact with external heat. It is used to reflect heat radiation and slow down the heat transferred inward.
[0044] The inner support layer 41 has an outward heat-conducting support part 412 on its outer side, located at the inner wall of the trough of the corrugated layer 43, which supports the minimum diameter of the corrugated layer 43 and increases the contact surface with the outside through the arc structure, thereby increasing the heat dissipation area of the inner core 1.
[0045] The outer support layer 42 has a heat-resistant part 421 of high-temperature resistant rubber on its inner side, which is in full contact with the outer wall of the corrugated layer.
[0046] A specific application of the operation process of this embodiment is as follows: Before use, the cable is moved to the designated work location. During the laying and use, the outer protective layer 21 is in direct contact with the outside world. When the cable encounters external mechanical impact, the elastic body of the interlayer 23 is compressed and deformed, and then the honeycomb layer 24 absorbs energy through plastic deformation. Finally, the glass microspheres of the inner layer 31 inhibit deformation, the vermiculite powder of the middle layer 32 buffers stress, and the graphite sheet of the outer layer 33 disperses the shock wave, thereby resisting external mechanical wear and isolating external aging and wear so that they cannot be transmitted inward. In fire conditions, the expanded graphite of the honeycomb layer 24 first seals the channels. Then, the insulation layer 3 utilizes the glass microspheres of the inner layer 31, the vermiculite powder of the middle layer 32, and the graphite sheets of the outer layer 33 to expand in a gradient, gradually filling the gaps and forming a dense ceramic layer structure. Compared with the traditional uniform filling method, this reduces the porosity between materials, which enhances both fire resistance and structural stability. Finally, the aerogel of the heat-insulating part 411 of the ceramicized layer 4 slows down the heat conduction from the outside to the inside, and the support part 412, combined with the corrugated layer 43, maintains the integrity of the internal structure of the cable.
[0047] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0048] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.
Claims
1. A ceramic composite rubber cable for urban public facilities, characterized by: It includes an inner core (1) composed of a lead core (11) and a filling layer (12); A sheath layer (2) is located at the outermost region of the inner core (1), and a double-layer interlayer (23) is arranged inside the sheath layer (2), and a honeycomb layer (24) is arranged between adjacent interlayers (23); An insulation layer (3) is located inside the sheath layer (2), and an inner layer (31) is arranged inside the insulation layer (3) to fill the gap and form a dense layer body; A ceramic layer (4) is located between the inner core (1) and the insulation layer (3), and an inner support layer (41), a corrugated layer (43) and an outer support layer (42) are arranged from inside to outside, the corrugated layer (43) is a corrugated structure to form support, the inner support layer (41) is attached to the inner core (1) to promote heat dissipation, and the outer support layer (42) is attached to the inner layer (31) to form an inner and outer structure isolation.
2. The ceramicized composite rubber cable for urban public facilities according to claim 1, characterized by: The inside of the sheath layer (2) is provided with an inner protective layer (22) and an outer protective layer (21), and adjacent interlayers (23) are arranged between the outer protective layer (21) and the inner protective layer (22).
3. The ceramicized composite rubber cable for urban public facilities according to claim 1, characterized by: The inside of the insulation layer (3) is provided with a middle layer (32) and an outer layer (33), which are arranged outside the inner layer (31) in sequence.
4. The ceramicized composite rubber cable for urban public facilities according to claim 3, characterized by: The inner layer (31) is low-expansion glass microbeads, the middle layer (32) is medium-expansion vermiculite powder, and the outer layer (33) is high-expansion graphite sheet.
5. The ceramicized composite rubber cable for urban public facilities according to claim 1, characterized by: The outer side of the inner support layer (41) is provided with a heat blocking part (411) located at the inner wall of the wave crest of the corrugated layer (43) for blocking and slowing down the heat transfer inward.
6. The ceramicized composite rubber cable for urban public facilities according to claim 1, characterized by: The outer side of the inner support layer (41) is provided with a support part (412) located at the inner wall of the wave trough of the corrugated layer (43), and the arc structure increases the heat dissipation area of the inner core (1).
7. The ceramicized composite rubber cable for urban public facilities according to claim 1, characterized by: The inner side of the outer support layer (42) is provided with a heat-resistant part (421) attached to the outer wall of the corrugated layer (43) to increase the contact area.