Fireproof high-stability transmission type EIB bus

Abstract

The utility model belongs to the technical field of cables, and provides a fireproof high-stability transmission type EIB bus, which comprises wire cores, a sub-shielding layer, a fireproof layer, a total shielding layer, a fire insulation layer and an outer sheath, the sub-shielding layer comprises drainage wires, an aluminum-plastic composite belt and a polyester wrapping belt, the aluminum-plastic composite belt is arranged on the outer sides of every two wire cores and one drainage wire to form a stranded wire, and the polyester wrapping belt is arranged on the outer side of the outer sheath. Every two stranded wires are stranded together, a polyester wrapping tape is arranged on the outer side of each stranded wire, and the fireproof layers are arranged on the outer sides of the sub-shielding layers and are made of heated and softened materials. The total shielding layer is arranged on the outer side of the fireproof layer, and the total shielding layer is a copper wire braid layer; the fire insulation layer is arranged on the outer side of the total shielding layer; and the outer sheath is arranged on the outer side of the fire insulation layer. According to the utility model, the sub-shielding layers and the total shielding layer adopt a composite shielding mode of aluminum-plastic composite tape wrapping and copper wire braiding, so that internal and external interference is avoided; in a fire disaster, the fireproof layer is heated and bonded with the total shielding layer to form a supporting framework, and normal signal transmission is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a fireproof and highly stable transmission type EIB bus. Background Art

[0002] The EIB bus system can be used in various building fields, including airports, hotels, exhibition halls, office buildings, multi-functional conference rooms, residences, etc. The main control objects are lighting, blinds, security systems, energy management, heating, ventilation, air conditioning systems, signal and monitoring systems, service interfaces, building control systems, remote control, metering, audio and video notifications, large household appliances, etc.

[0003] The EIB bus is usually laid in a fixed manner. During daily use, there are adverse conditions such as signal interference, wire core damage, and fire hazards. Existing products have weak anti-interference performance and lack fireproof performance. Once the EIB bus is damaged in a fire, the communication function cannot be maintained, resulting in the paralysis of the control system, which directly affects the escape of personnel and even causes major accidents. Utility Model Content

[0004] In view of the defects in the prior art, the utility model provides a fireproof and highly stable transmission type EIB bus to solve the problem that the current EIB bus is fixedly laid and has weak anti-interference performance, is easily damaged when a fire occurs, and cannot maintain communication functions.

[0005] The utility model provides a fireproof high-stability transmission type EIB bus, comprising:

[0006] Wire core;

[0007] A sub-shielding layer, the sub-shielding layer includes a drain wire, an aluminum-plastic composite tape and a polyester tape, the outer sides of every two of the wire cores and one of the drain wires are provided with an aluminum-plastic composite tape to form a twisted wire, and the outer sides of every two of the twisted wires are provided with the polyester tape;

[0008] A fireproof layer, arranged on the outer side of the sub-shielding layer, the fireproof layer is made of a heat-softening material;

[0009] A total shielding layer is arranged on the outside of the fireproof layer, and the total shielding layer is a copper wire braided layer;

[0010] A fire-insulating layer, arranged on the outer side of the overall shielding layer;

[0011] The outer sheath is arranged on the outer side of the fire insulation layer.

[0012] It can be seen from the above technical scheme that the fireproof and highly stable transmission type EIB bus provided by the utility model has a fireproof layer that is softened by heat and then quickly bonded and solidified when a fire occurs, and the copper wires of the fireproof layer and the overall shielding layer are woven and bonded together to form a supporting skeleton, which together form a closed tubular cavity; the thin cavity wall isolates the flame and can continuously block the high temperature in the combustion environment, ensuring that the EIB bus can still maintain normal signal transmission after a fire occurs.

[0013] Optionally, it also includes a flame retardant and high temperature filling rope, which is arranged on the inner side of the polyester wrapping tape, and the two twisted wires and the two flame retardant and high temperature filling ropes are twisted together.

[0014] Optionally, the twisting pitch of the twisted wire and the flame-retardant high-temperature filling rope is ≤120 mm.

[0015] Optionally, the twist of the flame retardant high temperature filling rope is 30-40 twists / m.

[0016] Optionally, the fireproof layer is formed by overlapping and wrapping fireproof tapes, and the material of the fireproof tapes is a glass fiber cloth composite fireproof coating.

[0017] Optionally, the fire-insulating layer is formed by extrusion, and the material of the fire-insulating layer is halogen-free, low-smoke, flame-retardant polyolefin.

[0018] Optionally, the outer sheath is made of halogen-free flame-retardant polyolefin.

[0019] By adopting the above technical solution, this application has the following technical effects:

[0020] The fireproof and highly stable transmission EIB bus provided by the utility model has a fireproof layer that is softened by heat and then rapidly bonded and solidified when a fire occurs, and the copper wires of the fireproof layer and the overall shielding layer are braided and bonded together to form a supporting skeleton, which together form a closed tubular cavity; the thin cavity wall isolates the flame and can continuously block the high temperature in the combustion environment, ensuring that the EIB bus can still maintain normal signal transmission after a fire occurs;

[0021] The sub-shielding layer and the overall shielding layer provided by the utility model adopt a composite shielding method of aluminum-plastic composite tape wrapping + copper wire weaving. The sub-shielding layer can prevent internal electromagnetic interference between twisted wires, and the composite shielding can avoid interference of external interference sources in the laying environment to the EIB bus itself. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the specific implementation or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0023] Figure 1 A schematic diagram of a fireproof and highly stable transmission type EIB bus provided in an embodiment of the utility model.

[0024] Reference numerals:

[0025] 1-wire core; 11-conductor; 12-insulating layer; 2-sub-shielding layer; 21-drainage wire; 22-aluminum-plastic composite tape; 23-polyester wrapping tape; 3-fireproof layer; 4-total shielding layer; 5-fireproof layer; 6-outer sheath; 7-flame-retardant high-temperature filling rope. DETAILED DESCRIPTION

[0026] The following embodiments of the technical solution of the utility model are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the protection scope of the utility model.

[0027] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by technicians in the field to which the utility model belongs.

[0028] In the description of the present application, 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", "axial", "radial", "circumferential" 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 referred device or element 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.

[0029] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0030] like Figure 1As shown, this embodiment provides a fireproof and highly stable transmission type EIB bus, including a wire core 1, a sub-shielding layer 2, a fireproof layer 3, a total shielding layer 4, a fireproof layer 5 and an outer sheath 6, the sub-shielding layer 2 includes a drainage wire 21, an aluminum-plastic composite tape 22 and a polyester tape 23, an aluminum-plastic composite tape 22 is arranged on the outside of every two wire cores 1 and one drainage wire 21 to form a twisted wire, every two twisted wires are twisted together and a polyester tape 23 is arranged on the outside, the fireproof layer 3 is arranged on the outside of the sub-shielding layer 2, and the fireproof layer 3 is a heat-softening material; the total shielding layer 4 is arranged on the outside of the fireproof layer 3, and the total shielding layer 4 is a copper wire braided layer; the fireproof layer 5 is arranged on the outside of the total shielding layer 4; the outer sheath 6 is arranged on the outside of the fireproof layer 5.

[0031] The sub-shielding layer 2 and the overall shielding layer 4 adopt a composite shielding method of aluminum-plastic composite tape 22 wrapping + copper wire weaving. The sub-shielding layer 2 can prevent internal electromagnetic interference between twisted pairs, and the composite shielding can prevent external interference sources in the laying environment from interfering with the EIB bus itself.

[0032] See also Figure 1 The core 1 includes a conductor 11 and an insulating layer 12 disposed outside the conductor 11. The conductor is a first-type round solid copper conductor, and the insulating layer 12 is a high-density polyethylene insulating material. The core 1 is precisely processed using a digital communication high-end PE data cable serial production line, so that the precision of the single wire of the conductor 11 is controlled to 0.002mm, the precision of the outer diameter of the insulating layer 12 is controlled to 0.005mm, and the concentricity of the insulating layer 12 is not less than 97%.

[0033] Specifically, there are four cores 1, two cores 1 are twisted to form two twisted groups, and each twisted group also includes a drain wire 21. The diameter of the conductor 11 of the core 1 in the twisted group is consistent with the diameter of the insulation layer 12, the difference in diameter of the two cores 1 is ≤0.002mm, the difference in outer diameter of the insulation layer 12 is ≤0.005mm, the difference in elongation is ≤2%, and the twisted pitch deviation is ≤0.2mm. Based on this, the accuracy of the core 1 and the twisted pitch can be guaranteed, and the stability of the EIB bus transmission signal can be improved.

[0034] Specifically, it also includes a flame retardant high temperature filling rope 7, which is arranged inside the polyester wrapping tape 23, and two twisted wires and two flame retardant high temperature filling ropes 7 are twisted. The twist pitch of the twisted wire and the flame retardant high temperature filling rope 7 is ≤120mm. The twist of the flame retardant high temperature filling rope 7 is 30-40 twists / m.

[0035] The fireproof layer 3 uses a fireproof tape, which is a composite fireproof coating of glass fiber cloth wrapped by overlapping. This coating has the characteristics of being softened by heat and then quickly bonded and solidified. When a fire occurs, the fireproof tape is heated, and the fireproof coating in the tape is quickly bonded and solidified, bonding the glass fiber cloth and the overall shielding layer 4 together to form a supporting skeleton, which together form a closed tubular cavity. The thin cavity wall isolates the flame and can continuously block the high temperature in the combustion environment, ensuring that the EIB bus can still maintain the function of normal signal transmission after a fire occurs.

[0036] The fireproof layer 5 is made of halogen-free, low-smoke, flame-retardant polyolefin material with an oxygen index (OI) ≥ 60. When a fire occurs, the fireproof layer can slow down the burning of the flame and the speed of heat transfer, preventing the flame from burning through the fireproof layer in a short time, and ensuring that the fireproof layer 3 has sufficient time to be softened by heat; the fireproof layer 3 is softened by heat and adheres to the overall shielding layer 4 to form a thin-walled cavity along the longitudinal direction of the cable, further blocking the burning of the flame and protecting the cable core; at the same time, the overall shielding layer 4 also plays a supporting role to prevent the inner fireproof layer 3 from being damaged by pressure.

[0037] The outer sheath 6 adopts a low-smoke, halogen-free, flame-retardant polyolefin sheath. Since the use environment of the EIB bus is mostly crowded places, it needs to meet the characteristics of low smoke, halogen-free, flame retardant, etc. The bus adopts a low-smoke, halogen-free, flame retardant sheath to ensure that a large amount of toxic gas and thick smoke will not be generated in the event of a fire, reducing the impact on personnel escape or secondary injury to personnel.

[0038] In the specification of the present utility model, a lot of specific details are described. However, it is understood that the embodiments of the present utility model can be practiced without these specific details. In some examples, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this specification.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model, and they should all be included in the scope of the claims and specification of the utility model.

Claims

1. A fireproof and highly stable transmission type EIB bus, characterized in that: include: Wire core; A sub-shielding layer, the sub-shielding layer includes a drain wire, an aluminum-plastic composite tape and a polyester tape, the outer sides of every two of the wire cores and one of the drain wires are provided with an aluminum-plastic composite tape to form a twisted wire, and the outer sides of every two of the twisted wires are provided with the polyester tape; A fireproof layer, arranged on the outer side of the sub-shielding layer, the fireproof layer is made of a heat-softening material; A total shielding layer is arranged on the outside of the fireproof layer, and the total shielding layer is a copper wire braided layer; A fire-insulating layer, arranged on the outer side of the overall shielding layer; The outer sheath is arranged on the outer side of the fire insulation layer.

2. The fireproof and highly stable transmission type EIB bus according to claim 1, characterized in that: It also includes a flame retardant and high temperature filling rope, which is arranged on the inner side of the polyester wrapping tape, and two of the twisted wires and two of the flame retardant and high temperature filling ropes are twisted together.

3. The fireproof and highly stable transmission type EIB bus according to claim 2, characterized in that: The twisting pitch of the twisted wire and the flame-retardant high-temperature filling rope is ≤120mm.

4. The fireproof and highly stable transmission type EIB bus according to claim 3, characterized in that: The twist of the flame retardant high temperature filling rope is 30-40 twists / m.

5. The fireproof and highly stable transmission type EIB bus according to claim 1 or 4, characterized in that: The fireproof layer is formed by overlapping and wrapping fireproof tapes, and the material of the fireproof tapes is a glass fiber cloth composite fireproof coating.

6. The fireproof and highly stable transmission type EIB bus according to claim 5, characterized in that: The fire-insulating layer is formed by extrusion, and the material of the fire-insulating layer is halogen-free, low-smoke, flame-retardant polyolefin.

7. The fireproof and highly stable transmission type EIB bus according to claim 6, characterized in that: The material of the outer sheath is halogen-free flame-retardant polyolefin.

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