TWM534886U - Improved structure of refractory cable - Google Patents

Description

Structural improvement of flame resistant cable

The present invention relates to a flame resistant cable, and more particularly to a structural improvement of a flame resistant cable that can be stably operated for a period of time under severe flame conditions.

In recent years, with the vigorous development of the construction industry, the concept of fire prevention of buildings has also improved. However, the damage caused by fires in our country is still quite serious. Therefore, in addition to the construction industry, it is necessary to make more effective space for fire safety. Outside the planning, the most important fire prevention measures are the use of fireproof materials. For example, in the selection of interior decoration materials and wire and cable for indoor and outdoor use, fireproof and flame retardant materials should be used as much as possible to avoid fire source generation. After that, the scale of combustion was enlarged, and the disaster caused it to be out of control. What's more, the height and density of buildings are gradually increasing, making it extremely difficult for people to escape. Therefore, the fire protection capability of interior decoration materials and cables needs to be further improved.

Because wire and cable are used as a transmission medium for electric energy, and are widely used in various fields such as construction, public works, telecommunications, electronics, motors, and information, major fire accidents caused by fires caused by wires and cables are common occurrences, in order to prevent such accidents. Occurrence, the improvement of fire resistance of wire and cable is a very important issue. For example, the cables used in emergency power supply systems are all flame-resistant cables. The main purpose is to coat the conductor with a flame-resistant layer so that the conductor can still run for a period of time in the flame. During this period, the power supply system still works normally to increase. The escape opportunity of the trapped person.

However, the flame-resistant layer of the traditional flame-resistant cable is mostly wrapped in a spiral winding package. Covering the conductor, the wrapping method generally has a slow processing speed, and because the flaming layer after winding has multiple overlaps, so that the overlap ratio is high, and the overlaps are not only unable to remain equal, but also have tension control problems, the tension is too Large or too small will cause wrinkles in the flame-resistant layer, and even cause the fire-resistant layer to not overlap well, which seriously affects the reliability of the flame-resistant layer.

In view of the improvement of the reliability of the flame-resistant layer in the conventional flame-resistant cable, the main purpose of the present invention is to provide a structure of a flame-resistant cable which can effectively increase the reliability of the flame-resistant layer to prolong the normal operation of the conductor in the flame. Improvement.

In order to achieve the above object, the present invention adopts the following technical solution: a structural improvement of a flame resistant cable, comprising at least one cable core, at least one flame resistant layer and at least one flame resistant wire, the flame resistant layer being wound in a concentric manner On the outer circumference of the cable core, the flame resistant wire is spirally wound around the flame resistant layer along the long axis direction of the cable core.

More specifically, the flame-resistant layer has opposite first side edges and second side edges, and the first side edge and the second side boundary define an overlapping area, and the overlapping area has an area of about The total area of the flame resistant layer is 10% to 60%.

Further, the area of the overlap region is about 55% of the total area of the flame resistant layer.

Further, two of the flame-resistant layers are sequentially wound on the outer circumference of the cable core in a concentric manner, and the outer side of the flame-resistant layer surrounds a part of the outer periphery of the inner flame-resistant layer, and the outer side The overlapping area of the flame resistant layer and the overlapping area of the inner side of the flame resistant layer are distributed 180 degrees back.

Furthermore, two of the flame resistant wires are spirally wound on the inner and outer sides of the two flame resistant layers, respectively.

Furthermore, the outer side of the flame resistant wire is opposite to the spiral direction of the inner side of the flame resistant wire.

More specifically, the flame resistant layer is a layer of mica tape.

Further, the mica tape is a synthetic mica tape or a natural mica tape.

Further, the flame resistant layer is a layer of fiber composite tape.

More specifically, the flame resistant wire is a glass fiber filament.

More specifically, an insulating layer is further included, and the insulating layer surrounds and covers the flame resistant layer.

More specifically, a coating layer is further included, the coating layer surrounding the periphery of the insulating layer.

Furthermore, a filler having a heat insulating function is filled between the coating layer and the insulating layer.

The present invention has at least the following beneficial effects: the structural improvement of the flame resistant cable provided by the present embodiment is performed by "at least one flame resistant layer is concentrically wound around the outer circumference of the cable core, and at least one of the flame resistant wires is along the length of the cable core. The design of the spiral winding on the flame-resistant layer in the axial direction not only simplifies the processing of the cable, but also improves the production efficiency.

In view of the above, since the flame-retardant layer after a single winding has only one overlap, it has high reliability, so that the flame-resistant layer does not immediately fail under severe flame conditions to meet the emergency power supply requirement in a fire. And because of the increase in reliability, the number of sheets of the flame-resistant layer can be reduced, thereby reducing the material cost.

In order to further understand the features and technical contents of this creation, please refer to the following detailed description and drawings of this creation, but these descriptions and drawings are only used to illustrate this creation, not the right to this creation. The scope is subject to any restrictions.

100‧‧‧Storable cable

1‧‧‧ cable core

2‧‧‧flame resistant layer

21‧‧‧ first side

22‧‧‧Second side

A‧‧‧Overlapping area

3‧‧‧Flame resistant wire

4‧‧‧Insulation

5‧‧‧covered layer

6‧‧‧Filling

Fig. 1 is a cross-sectional view showing the structural improvement of the flame resistant cable of the present invention.

2 is a perspective view of a portion of the cable core, the flame resistant layer, and the flame resistant wire of the first embodiment of the present invention.

Figure 3 is a side elevational view of a portion of the cable core, flame resistant layer and flame resistant wire of the first embodiment of the present invention.

4 is a view of a cable core, a flame resistant layer and a flame resistant wire according to a second embodiment of the present invention; Part of the perspective view.

Figure 5 is a top plan view of a portion of the cable core, flame resistant layer and flame resistant wire of the second embodiment of the present invention.

Figure 6 is a bottom plan view of a portion of the cable core, flame resistant layer and flame resistant wire of the second embodiment of the present invention.

The content disclosed in this creation is mainly about the structural improvement of a flame-resistant cable, which is characterized in that the wrapping method of the flame-resistant layer is changed from the traditional "wrap-around method" of spiral winding to the "longitudinal package method" of concentric winding. This improves the reliability of the flame-resistant layer, so that the flame-resistant layer does not immediately fail under severe flame conditions to meet the emergency power supply requirements in the event of a fire. It is also worth mentioning that the longitudinal insulation of the flame-retardant layer on the outer circumference of the cable core not only simplifies the processing of the cable, improves the production efficiency, but also reduces the number of sheets used for the flame-resistant layer.

The following is a specific example to illustrate the implementation of the "structural improvement of the flame resistant cable" disclosed in the present application, and those skilled in the art can understand the advantages and effects of the present invention from the contents disclosed in the present specification. The present invention can be implemented or applied in various other specific embodiments. The details of the present specification can also be modified and changed without departing from the spirit and scope of the present invention. In addition, the drawings of this creation are only for a brief illustration, and are not described in terms of actual dimensions. The following embodiments will further explain the related technical content of the present invention, but the disclosed content is not intended to limit the technical scope of the present creation.

[First Embodiment]

1 to FIG. 3, FIG. 1 is a cross-sectional view showing a structural improvement of the flame resistant cable according to the first embodiment of the present invention, and FIG. 2 and FIG. 3 are respectively a cable core, a flame resistant layer and a flame resistant wire in the structural improvement of the flame resistant cable. Part of the perspective and side view. The flame resistant cable 100 provided in this embodiment includes a cable core 1, a flame resistant layer 2, a flame resistant wire 3, The insulating layer 4, the covering layer 5, and the filler 6, the flame resistant cable 100 can be used for a power supply line, a data transmission line, a communication wire, a cable, etc., but the creation is not limited thereto.

Hereinafter, specific examples of the cable core 1, the flame resistant layer 2, and the flame resistant wire 3 and their mutual relationship will be described. The cable core 1 is used to transmit a power source or signal, which may be composed of a conductor such as a copper wire or an aluminum wire, and may have various aspects such as beam twisting or re-twisting. The flame-resistant layer 2 is wrapped on the cable core 1 in a longitudinally wrapped manner, and is used to improve the fireproof capability of the cable and prevent the cable core 1 from being exposed. In this embodiment, the outer circumference of the cable core 1 is only covered with a flame-resistant layer 2, which may be a mica tape or a fiber composite tape. As a specific example of the mica tape, there are a synthetic mica tape and a natural mica tape, since the mica has the highest temperature resistance. It is 1300 ° C, and the temperature resistance of the fiber composite belt can reach 2000 ° C or higher, so that the fire can be blocked from invading the inside of the cable core 1 for a period of time. In order to fix the fire-resistant layer 2 after winding, the present method is to spirally wind the flame-resistant wire 3 along the long-axis direction of the cable core 1 on the flame-resistant layer 2 to tightly bite the flame-resistant layer 2, thereby protecting The integrity of the cable core 1 and the flame resistant layer 2; in this embodiment, the flame resistant wire 3 may be a glass fiber, but the creation is not limited thereto.

Further explaining the difference between the traditional "wrap-around method" of the "longitudinal mode" of the present invention, firstly, the opposite sides of the flame-resistant layer 2 are defined as a first side 21 and a second side 22, and the first side 21 and the second side The side edge 22 can define an overlapping area A on the fire-resistant layer 2 after winding; for the flame-resistant layer 2 coated on the cable core 1 by the longitudinal wrapping method, the area of the overlapping area A is about the total of the flame-resistant layer 2 The area is 10%~60%, and the effect that can be achieved by 55% is better. It is worth noting that since the fire-resistant layer 2 after winding has only one overlap (ie, the overlap area A), it has high reliability; and since the flame-resistant layer 2 only needs one winding operation, the cable core 1 is completely covered. Therefore, the processing of the cable can be simplified.

Referring to FIG. 1, the bonding relationship between the insulating layer 4, the filler 6, and the covering layer 5 and its members and the aforementioned members will be described next. The outer portion of the flame-resistant layer 2 is covered with an insulating layer 4 for blocking the inner cable core 1 from coming into contact with the outer conductor to improve the overall safety of the flame-resistant cable 100. In this embodiment, the insulating layer 4 may be It is made of a thermoplastic or thermosetting insulating material. Specific examples of the thermoplastic insulating material include PE, PVC, LDPE, HDPE, PP, PU, nylon, and Teflon. Specific examples of the thermosetting insulating material are exemplified. Out: SBR, NBR, EPR, EPT, silicon rubber, etc.

The cover layer 5 surrounds the outer edge of the insulating layer 4. The material of the cover layer 5 may be the same as or different from the material of the insulating layer 4. For example, the materials of both the insulating layer 4 and the cover layer 5 may be made of PE, or The coating layer 5 may be made of PVC; organic or inorganic additives (such as aluminum hydroxide, antimony trioxide, etc.) may be added to the coating layer 5 without affecting the reliability of the flame-resistant layer 2. Improve its flame retardancy. The filler 6 and the insulating layer 4 may be filled with a filler 6 which makes the formed flame resistant cable 100 more round, which may be a PP rope or a PVC rope, but the creation is not limited thereto.

[Second embodiment]

Please refer to FIG. 1 , and please refer to FIG. 4 to FIG. 6 . FIG. 4 is a perspective view of a portion of the cable core, the flame resistant layer and the flame resistant wire according to the second embodiment of the present invention, and FIG. 5 and FIG. Upper and lower views of a portion of the cable core, flame resistant layer and flame resistant wire of the embodiment. First of all, the related technical details of the flame resistant cable 100 provided in this embodiment are substantially the same as those of the first embodiment, and the main difference between the two is that: in this embodiment, at least two layers of the flame resistant layer 2 are used for coating. Cable core 1.

Furthermore, the inner and outer fire-resistant layers 2 are sequentially wound on the outer circumference in a concentric manner, and the two flame-resistant wires 3 are spirally wound on the inner and outer fire-resistant layers 2, respectively. The flame-resistant layer 2 surrounds a portion of the outer periphery of the inner flame-resistant layer 2; preferably, the overlap region A of the outer flame-resistant layer 2 and the overlap region A of the inner flame-resistant layer 2 are distributed back by about 180 degrees (see FIG. 5 and FIG. 6)), and the outer side of the flame resistant wire 3 is opposite to the spiral direction of the inner flame resistant wire 3 (as shown in FIG. 4), so that the outer flame resistant layer 2 can stabilize the overlap of the inner flame resistant layer 2 Cracking to improve overall reliability.

[Possible effects of the examples]

The structural improvement of the flame resistant cable provided by the present embodiment is wound on the outer circumference of the cable core in a concentric manner by at least one flame resistant layer, and at least one flame resistant wire is spirally wound on the flame resistant layer along the long axis direction of the cable core. The design not only simplifies the cable processing process, but also improves production efficiency.

In view of the above, since the flame-retardant layer after a single winding has only one overlap, it has high reliability, so that the flame-resistant layer does not immediately fail under severe flame conditions to meet the emergency power supply requirement in a fire. And because of the increase in reliability, the number of sheets of the flame-resistant layer can be reduced, thereby reducing the material cost.

Furthermore, the structural improvement of the flame resistant cable provided by the present embodiment is achieved by "the inner and outer two layers of the flame resistant layer are sequentially wound on the outer circumference in a concentric manner, and the two flame resistant wires are spirally wound around the inner and outer sides respectively. On the two-layer flame-resistant layer, wherein the overlapping area of the outer flame-resistant layer and the overlap of the inner flame-resistant layer are distributed in a back direction of about 180 degrees, and the outer side of the flame-resistant wire is opposite to the spiral direction of the inner side of the flame-resistant wire," Further improve the reliability and durability of cable quality.

The above description is only an embodiment of the present invention, and is not intended to limit the scope of patent protection of the present invention. Anyone who is familiar with the art of the artist, within the spirit and scope of the creation, the equivalent of the change and retouching is still within the scope of the patent protection of the creation.

1‧‧‧ cable core

2‧‧‧flame resistant layer

3‧‧‧Flame resistant wire

A‧‧‧Overlapping area

Claims (13)

A structural improvement of a flame resistant cable comprising: at least one cable core; at least one flame resistant layer wound in a concentric manner on an outer circumference of the cable core; and at least one flame resistant wire, the flame resistant wire The long axis direction of the cable core is spirally wound around the flame resistant layer. The structural improvement of the flame resistant cable according to claim 1, wherein the flame resistant layer has opposite first side edges and second side edges, and the first side edge and the second side boundary define an overlapping area The area of the overlap region is about 10% to 60% of the total area of the flame resistant layer. The structural improvement of the flame resistant cable according to claim 2, wherein the area of the overlap region is about 55% of the total area of the flame resistant layer. The structural improvement of the flame resistant cable according to claim 2, wherein two of the flame resistant layers are sequentially wound in a concentric manner on the outer circumference of the cable core, and the outer side of the flame resistant layer surrounds the inner side of the flame resistant A portion of the outer circumference of the layer, and the overlap region of the outer flame-resistant layer and the overlap region of the inner flame-resistant layer are distributed 180 degrees back. The structure of the flame resistant cable according to claim 4 is improved, wherein two of the flame resistant wires are spirally wound around the inner side of the flame resistant layer and the outer side of the flame resistant layer. The structural improvement of the flame resistant cable according to claim 5, wherein the outer side of the flame resistant wire is opposite to the spiral direction of the inner side of the flame resistant wire. The structural improvement of the flame resistant cable according to claim 1, wherein the flame resistant layer is a layer of mica tape. The structural improvement of the flame resistant cable according to claim 7, wherein the mica tape is a synthetic mica tape or a natural mica tape. The structural improvement of the flame resistant cable according to claim 1, wherein the flame resistant layer is a layer of fiber composite tape. The structural improvement of the flame resistant cable according to claim 1, wherein the flame resistant wire is a glass fiber yarn. The structural improvement of the flame resistant cable according to claim 1, further comprising an insulating layer surrounding and covering the flame resistant layer. The structural improvement of the flame resistant cable according to claim 11, further comprising a coating layer surrounding the periphery of the insulating layer. The structural improvement of the flame resistant cable according to claim 12, wherein a filler having a heat insulating function is filled between the coating layer and the insulating layer.