Halogen-free, low-smoke, flame-retardant and termite-proof elevator accompanying flat cable

Abstract

The invention discloses a halogen-free, low-smoke, flame-retardant and termite-proof elevator accompanying flat cable, and the cable comprises a flat outer protection layer which is used for wrapping components horizontally disposed in the elevator accompanying flat cable; the control unit comprises a plurality of control wire groups which are horizontally and symmetrically arranged on the left side and the right side in the flat outer protection layer in parallel, and each control wire group comprises a central elastic filling strip and insulating wire cores which surround the periphery of the filling strip and are twisted; the communication unit comprises two communication wire groups which are horizontally arranged in the middle of the flat outer protection layer in parallel, each communication wire group comprises two video wires, a communication optical cable, a drainage wire, a shielding layer and an inner protection layer, the shielding layer wraps the video wires, the communication optical cable and the drainage wire which are twisted, and the inner protection layer is extruded on the outer surface of the shielding layer; the steel wire ropes are symmetrically arranged on two sides of the communication unit. The cable is simple in structure, easy to produce and manufacture and suitable for the elevator shaft in a termite hazard area, and safe power supply and signal transmission between the control cabinet and the lift car are guaranteed.

Description

Technical Field

[0001] The invention relates to the field of electric wires and cables, and in particular to a halogen-free, low-smoke, flame-retardant and termite-proof elevator traveling flat cable. Background Art

[0002] In recent years, with the advancement of urbanization and urban planning and construction, the construction of high-rise buildings, petroleum, mining, metallurgy, ships, power stations, subways, airports, stations, tunnel transportation, and the increase in large-scale public sports, entertainment venues, and public transportation facilities, the number of elevators used is increasing, and the proportion of safe power supply and signal transmission interruption between the elevator control cabinet and the car caused by the fire of the elevator accompanying flat cable used in the elevator is increasing. At the same time, in the elevator shaft in the termite-damaged area, cable fire accidents and termites biting through the cable sheath and insulation in recent years have frequently occurred, causing transmission failures, leakage power outages, and even fire and explosion accidents, which not only caused huge economic losses, but also took a long time to repair the power outage, seriously affecting the inconvenience of industrial and agricultural production and people's lives in using elevators and the safety of elevator operation.

[0003] At present, most of the anti-termite flat cables for elevators at home and abroad are made of ordinary flame-retardant anti-termite PVC materials, and the anti-termite function is achieved by chemical methods. Since PVC materials contain Cl elements, HCl toxic gas will be produced when burned, which will cause suffocation and poisoning to the on-site personnel. When burning, the smoke is large, the light transmittance is poor, and the line of sight is blocked, which is not convenient for the on-site personnel to escape and rescue. At the same time, the anti-termite function is achieved by chemical methods, which will affect the ecological environment.

[0004] In view of this, the present application aims to develop an elevator traveling flat cable that can meet the requirements of halogen-free, low smoke, low toxicity, Class A flame retardant, and termite-proof. When a fire occurs, it can better protect personal safety and reduce property losses. At the same time, it is suitable for elevator shafts in termite-infested areas to prevent termites from damaging the elevator traveling cables and ensure safe power supply and signal transmission between the control cabinet and the car. Summary of the invention

[0005] The purpose of the present invention is to overcome the defects of the prior art and provide a clean, halogen-free, low-smoke, Class A flame-retardant, termite-proof elevator traveling flat cable, which produces extremely low smoke concentration under flame combustion conditions, releases very little toxic and corrosive halogen acid gas, and has good mechanical properties. It meets the functions of halogen-free, low-smoke, low-toxic, Class A flame-retardant, and termite-proof. When a fire occurs, this application can better protect personal safety and reduce property losses. At the same time, it is suitable for elevator shafts in termite-infested areas to prevent termites from damaging the elevator traveling cable and ensure safe power supply and signal transmission between the control cabinet and the car.

[0006] To achieve the above-mentioned purpose, the present invention provides a halogen-free, low-smoke, flame-retardant, and termite-proof elevator accompanying flat cable, comprising: a flat outer protective layer, used to wrap the horizontally placed components in the elevator accompanying flat cable; a control unit, comprising a plurality of control line groups horizontally arranged in parallel on the left and right sides of the inside of the flat outer protective layer, at least one pair of control line groups symmetrically arranged on the left and right sides of the inside of the flat outer protective layer, each control line group comprising a central elastic filling strip and an insulating wire core twisted and arranged around the outer periphery of the filling strip; a communication unit, comprising a plurality of symmetrical communication line groups horizontally arranged in parallel in the middle of the flat outer protective layer, each communication line group comprising two video lines, a communication optical cable, a drainage line, a shielding layer, and an inner protective layer, the shielding layer wraps the twisted video line, communication optical cable and drainage line, and the inner protective layer is extruded on the outer surface of the shielding layer; steel wire ropes, symmetrically arranged on both sides of the communication unit, and the steel wire ropes on both sides are twisted in opposite directions. Among them, the flat outer protective layer is made of halogen-free low-smoke elastomer cross-linked polyolefin anti-termite flame retardant sheath material, and the inner protective layer is made of halogen-free low-smoke cross-linked polyolefin flame retardant material.

[0007] According to an embodiment of the present application, two video lines are twisted in parallel, and the communication optical cable and the drainage line are respectively located on both sides of the twisted part of the video lines.

[0008] According to an embodiment of the present application, each control wire group includes 5 insulating cores, and the insulating cores include a plurality of twisted annealed fine copper wires and an outer extruded halogen-free low-smoke cross-linked polyolefin flame-retardant insulation layer.

[0009] According to an embodiment of the present application, the control line groups on the left and right sides of the flat outer protective layer are symmetrically arranged along the flat direction, with opposite twisting directions, and the total number is an even number.

[0010] According to an embodiment of the present application, the shielding layer is formed by wrapping an external aluminum-plastic composite tape tightly.

[0011] According to an embodiment of the present application, the steel wire rope is an aviation steel wire rope, and the symmetrically arranged aviation steel wire ropes have opposite twist directions.

[0012] According to an embodiment of the present application, the center of the video cable is a soft copper conductor, and the outer surface of the soft copper conductor is extruded with a halogen-free, low-smoke, cross-linked polyolefin flame-retardant insulation layer.

[0013] According to an embodiment of the present application, the control unit in the flat outer protective layer includes three control line groups located on the left side of the flat outer protective layer and three control line groups located on the right side of the flat outer protective layer.

[0014] According to an embodiment of the present application, the communication unit includes two symmetrical communication line groups in the middle of the flat outer protective layer.

[0015] According to the embodiments of the present application, the raw materials for producing the halogen-free low-smoke elastomeric cross-linked polyolefin anti-termite flame-retardant sheath material and the halogen-free low-smoke cross-linked polyolefin flame-retardant material include polyolefin resin, coupling agent, flame retardant, stabilizer, smoke suppressant and lubricant.

[0016] The beneficial effects of the technical solution of the present invention compared with the prior art are:

[0017] 1. The outer protective layer, inner protective layer, insulating layer, conductor outer sheath and the like used in the present invention are made of halogen-free low-smoke elastomer cross-linked polyolefin flame-retardant sheath material, halogen-free low-smoke cross-linked polyolefin flame-retardant sheath material and halogen-free low-smoke cross-linked polyolefin flame-retardant insulation material. Compared with ordinary flame-retardant and termite-proof PVC materials, they do not contain chemicals harmful to the environment, and mainly achieve the purpose of termite prevention through physical properties, and utilize the hardness of the halogen-free low-smoke elastomer cross-linked polyolefin flame-retardant sheath material and the smoothness of the cable surface to prevent termite invasion; the halogen-free low-smoke elastomer cross-linked polyolefin flame-retardant sheath material, halogen-free low-smoke cross-linked polyolefin flame-retardant sheath material and halogen-free low-smoke cross-linked polyolefin flame-retardant insulation material are not only low in production cost but also flame-retardant, and the smoke concentration generated under flame combustion is extremely low, and the amount of toxic and corrosive halogen acid gas released is also extremely small. They also have good mechanical properties and have halogen-free, low-smoke, low-toxic, Class A flame-retardant and termite-proof functions.

[0018] 2. The communication unit provided in the accompanying flat cable of the present invention includes a video line, a communication optical cable and a shielding layer, and has a faster transmission speed, which can effectively meet the transmission of current elevator communication signals. At the same time, the shielding layer can reduce external interference to the communication line group, improve the anti-interference ability of the communication line group, and reduce signal distortion.

[0019] 3. The network line group of the present invention adopts a flat cable with a flat structure, and the line group adopts a composite conductor structure. The soft copper conductor and the halogen-free low-smoke cross-linked polyolefin flame-retardant insulation outer sheath have strong tensile strength and flexibility. Through the combination with the flat halogen-free low-smoke cross-linked polyolefin flame-retardant outer protective layer, it can not only ensure that the flat cable has a stable structure and is not easy to break during the accompanying operation, but also ensure the stability of the network transmission signal, thereby improving the complete operation capacity of the flat cable line.

[0020] 4. The control line groups, communication line groups and steel wire ropes in the accompanying flat cable of the present invention all adopt a symmetrically arranged structure. When the accompanying cable is bent, the force is symmetrical and uniform, and it is not easy to be damaged or entangled. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The present invention is a schematic diagram of the composition structure of a halogen-free, low-smoke, flame-retardant, termite-proof elevator traveling flat cable.

[0022] The following are the descriptions of the reference numerals:

[0023] 10. Flat outer protective layer, 20. Control unit, 21. Control line group, 30. Communication unit, 31. Video line, 32. Drain line, 33. Communication optical cable, 40. Steel wire rope, 211. Elastic filling strip, 212. Insulated core, 2121. Insulation layer. DETAILED DESCRIPTION

[0024] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. The following embodiments are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0025] It should be noted that halogen-free low-smoke cross-linked polyolefin flame-retardant insulation materials, halogen-free low-smoke cross-linked polyolefin flame-retardant sheath materials, and halogen-free low-smoke elastomer cross-linked polyolefin anti-termite flame-retardant sheath materials are made of polyolefin resin as the main raw material, with coupling agent, flame retardant, stabilizer, smoke suppressant, lubricant and other additives added, and are made by mixing, extrusion and granulation. Halogen-free low-smoke cross-linked polyolefin materials are non-toxic, odorless, resistant to high and low temperatures, ozone aging, weather aging, excellent electrical insulation and mechanical properties, and are soft, have very good flame retardant effects and good processing properties. In addition, halogen-free low-smoke flame-retardant elastomer cross-linked polyolefin anti-termite flame-retardant sheath materials are a new type of environmentally friendly anti-termite material that does not contain chemicals harmful to the environment and mainly achieves the purpose of anti-termite through physical properties. The hardness of the cable sheath material and the smoothness of the cable surface are used to prevent termite infestation.

[0026] like Figure 1 As shown, a halogen-free, low-smoke, flame-retardant, and termite-proof elevator accompanying flat cable exemplified by the present invention comprises a flat outer protective layer 10 and a control unit 20, a communication unit 30, and a steel wire rope 40 disposed in the flat outer protective layer 10. Compared with the common flame-retardant and termite-proof PVC material commonly used in the prior art, the present application adopts halogen-free, low-smoke polyolefin flame-retardant materials for the protective layer, the control unit 20, and the communication unit 30, which do not contain chemicals harmful to the environment, and mainly achieve the purpose of termite prevention through physical properties, which is beneficial to The hardness of the cable sheath material and the smoothness of the cable surface are used to prevent termite infestation. At the same time, the halogen-free low-smoke elastomeric cross-linked polyolefin material and the halogen-free low-smoke cross-linked polyolefin flame retardant produce extremely low smoke concentration under flame combustion, and the amount of toxic and corrosive halogen acid gas released is also extremely small. It also has good mechanical properties, meets the halogen-free, low-smoke, low-toxic, flame-retardant Class A, and termite-proof functions, and is suitable for elevator shafts in termite-infested areas to prevent termites from damaging the elevator's accompanying cables, ensuring safe power supply and signal transmission between the control cabinet and the car.

[0027] In this embodiment, the flat outer protective layer 10 is used to wrap the horizontally placed components in the elevator traveling flat cable.

[0028] Specifically, the flat outer protective layer 10 is preferably made of a halogen-free low-smoke elastomer cross-linked polyolefin anti-termite flame retardant sheath material, which has low production cost and good flame retardant and anti-termite performance. The smoke concentration generated under flame combustion is extremely low, and the amount of toxic and corrosive halogen acid gas released is also extremely small, and it also has good mechanical properties. The preferred flat shape design has a small deformation when the accompanying cable is bent and is not easy to break, thereby improving the bending and breaking resistance of the accompanying cable.

[0029] In this embodiment, the control unit 20 includes a plurality of control wire groups 21 horizontally arranged in parallel on the left and right sides of the flat outer protective layer 10, at least one pair of control wire groups 21 are symmetrically arranged on the left and right sides of the flat outer protective layer 10, and each control wire group 21 includes a central elastic filling strip 211 and an insulating wire core 212 twisted and arranged around the outer periphery of the filling strip.

[0030] Specifically, the control line groups 21 on the left and right sides of the flat outer protective layer 10 are symmetrically arranged along the flat direction, with opposite twisting directions, and the total number is an even number.

[0031] Specifically, the control unit 20 preferably includes three control line groups 21 located on the left side of the flat outer protective layer 10 and three control line groups 21 located on the right side of the flat outer protective layer 10 .

[0032] Specifically, each control wire group 21 includes 5 insulating cores 212, and the insulating cores 212 include a plurality of twisted annealed fine copper wires and an outer extruded halogen-free, low-smoke, cross-linked polyolefin flame-retardant insulation layer 2121. The halogen-free, low-smoke, cross-linked polyolefin flame-retardant insulation material has excellent flame retardant properties, and the smoke concentration generated during combustion is extremely low, and the amount of toxic and corrosive halogen acid gas released is also extremely small. At the same time, it also has good mechanical properties.

[0033] Specifically, the control line groups 21 on the left and right sides of the flat outer protective layer 10 are symmetrically arranged along the flat direction, with opposite twist directions, and the total number is an even number. Preferably, the control unit 20 is a control line group 21 with six groups, and three control line groups 21 are evenly distributed on the left and right sides of the flat outer protective layer 10, and the control line groups 21 on the left and right sides are symmetrically arranged, with opposite longitudinal directions, and the number of control line groups 21 is an even number.

[0034] In this embodiment, the communication unit 30 includes a plurality of symmetrical communication line groups horizontally arranged in parallel in the middle of the flat outer protective layer 10, each communication line group includes two video lines 31, a communication optical cable 33, a drainage line 32, a shielding layer, and an inner protective layer. The shielding layer wraps the twisted video line 31, the communication optical cable 33 and the drainage line 32, and the inner protective layer is extruded on the outer surface of the shielding layer;

[0035] Specifically, the communication unit 30 is preferably two communication line groups symmetrically arranged in the middle of the flat outer protective layer 10 .

[0036] Specifically, two video cables 31 are twisted in parallel, and the communication optical cable 33 and the drainage cable 32 are respectively located on both sides of the twisted part of the video cables 31. The center of the video cable 31 is a soft copper conductor, and the outer surface of the soft copper conductor is extruded with a halogen-free low-smoke cross-linked polyolefin flame-retardant insulation layer. The halogen-free low-smoke cross-linked polyolefin flame-retardant material has excellent flame-retardant properties, and the smoke concentration generated during combustion is extremely low, and the amount of toxic and corrosive halogen acid gas released is also extremely small. At the same time, it also has good mechanical properties.

[0037] Specifically, the shielding layer is formed by wrapping an external aluminum-plastic composite tape tightly, and the inner protective layer extruded on the outer surface of the shielding layer is preferably made of a halogen-free, low-smoke, cross-linked polyolefin flame-retardant sheath material, which has excellent flame retardant properties, produces extremely low smoke concentration during combustion, and releases very little toxic and corrosive halogen acid gas. It also has good mechanical properties.

[0038] In this embodiment, the steel wire ropes 40 are symmetrically arranged on both sides of the communication unit 30, and the steel wire ropes 40 on both sides are twisted in opposite directions. The steel wire ropes 40 can preferably be aviation steel wire ropes 40, and the symmetrically arranged aviation steel wire ropes 40 are twisted in opposite directions.

[0039] Specifically, halogen-free low-smoke cross-linked polyolefin flame-retardant insulation materials, halogen-free low-smoke cross-linked polyolefin flame-retardant sheath materials, and halogen-free low-smoke elastomer cross-linked polyolefin anti-termite flame-retardant sheath materials are made of polyolefin resin as the main raw material, adding coupling agents, flame retardants, stabilizers, smoke suppressants, lubricants and other additives, and are made through mixing, extrusion, and granulation. These materials are non-toxic, odorless, resistant to high and low temperatures, ozone aging, weather aging, excellent electrical insulation and mechanical properties, and are soft, have very good flame retardant effects, and good processing properties.

[0040] In summary, the technical solution of this application has the following beneficial effects:

[0041] 1. The outer protective layer, inner protective layer, insulating layer, conductor outer sheath and the like used in the present invention are made of halogen-free low-smoke elastomeric cross-linked polyolefin flame-retardant sheath material, halogen-free low-smoke cross-linked polyolefin flame-retardant sheath material and halogen-free low-smoke cross-linked polyolefin flame-retardant insulation material. Compared with ordinary flame-retardant and termite-proof PVC materials, they do not contain chemicals harmful to the environment, and mainly achieve the purpose of termite prevention through physical properties, and utilize the hardness of the halogen-free low-smoke elastomeric cross-linked polyolefin flame-retardant sheath material and the smoothness of the cable surface to prevent termite invasion; the halogen-free low-smoke elastomeric cross-linked polyolefin flame-retardant sheath material, halogen-free low-smoke cross-linked polyolefin flame-retardant sheath material and halogen-free low-smoke cross-linked polyolefin flame-retardant insulation material are not only low in production cost but also flame-retardant, the smoke concentration generated under flame combustion is extremely low, the amount of toxic and corrosive halogen acid gas released is also extremely small, and they also have good mechanical properties, and have halogen-free, low-smoke, low-toxic, Class A flame-retardant and termite-proof functions.

[0042] 2. The communication unit provided in the accompanying flat cable of the present invention includes a video line, a communication optical cable and a shielding layer, and has a faster transmission speed, which can effectively meet the transmission of current elevator communication signals. At the same time, the shielding layer can reduce external interference to the communication line group, improve the anti-interference ability of the communication line group, and reduce signal distortion.

[0043] 3. The network line group of the present invention adopts a flat cable with a flat structure, and the line group adopts a composite conductor structure. The soft copper conductor and the halogen-free low-smoke cross-linked polyolefin flame-retardant insulation outer sheath have strong tensile strength and flexibility. Through the combination with the flat halogen-free low-smoke cross-linked polyolefin flame-retardant outer protective layer, it can not only ensure that the flat cable has a stable structure and is not easy to break during the accompanying operation, but also ensure the stability of the network transmission signal, thereby improving the complete operation capacity of the flat cable line.

[0044] 4. The control line groups, communication line groups and steel wire ropes in the accompanying flat cable of the present invention all adopt a symmetrically arranged structure. When the accompanying cable is bent, the force is symmetrical and uniform, and it is not easy to be damaged or entangled.

[0045] The above are only preferred embodiments of the present invention, and are not intended to limit the implementation methods and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A halogen-free, low-smoke, flame-retardant, and termite-proof elevator flat cable, characterized in that: include: The flat outer protective layer is used to wrap the horizontally placed components in the elevator's accompanying flat cable; A control unit, comprising a plurality of control wire groups arranged horizontally and parallelly on the left and right sides of the inside of the flat outer protective layer, at least one pair of the control wire groups being symmetrically arranged on the left and right sides of the inside of the flat outer protective layer, and each group of the control wire groups comprising a central elastic filling strip and an insulating wire core twisted and arranged around the outer periphery of the filling strip; The communication unit comprises a plurality of symmetrical communication line groups horizontally arranged in parallel in the middle of the flat outer protective layer, each of the communication line groups comprises two video lines, a communication optical cable, a drainage line, a shielding layer and an inner protective layer, the shielding layer wraps the twisted video lines, the communication optical cable and the drainage line, and the inner protective layer is extruded on the outer surface of the shielding layer; Steel wire ropes are symmetrically arranged on both sides of the communication unit, and the steel wire ropes on both sides are twisted in opposite directions; Wherein, the flat outer protective layer is made of halogen-free low-smoke elastomer cross-linked polyolefin anti-termite flame-retardant sheath material; Wherein, the inner protective layer is made of halogen-free low-smoke cross-linked polyolefin flame retardant material.

2. The halogen-free, low-smoke, flame-retardant, and termite-proof elevator traveling flat cable according to claim 1 is characterized in that: The two video lines are twisted in parallel, and the communication optical cable and the drainage line are respectively located on both sides of the twisting point of the video lines.

3. The halogen-free, low-smoke, flame-retardant, and termite-proof elevator traveling flat cable according to claim 1 is characterized in that: Each control line group includes 5 insulating cores, and the insulating cores include a plurality of twisted annealed fine copper wires and an outer extruded halogen-free low-smoke cross-linked polyolefin flame-retardant insulation layer.

4. The halogen-free, low-smoke, flame-retardant, and termite-proof elevator traveling flat cable according to claim 1 is characterized in that: The control line groups on the left and right sides of the flat outer protective layer are symmetrically arranged along the flat direction, with opposite twisting directions, and the total number is an even number.

5. The halogen-free, low-smoke, flame-retardant, and termite-proof elevator traveling flat cable according to claim 1 is characterized in that: The shielding layer is formed by wrapping and tightly wrapping an external aluminum-plastic composite tape.

6. The halogen-free, low-smoke, flame-retardant, and termite-proof elevator traveling flat cable according to claim 1, characterized in that: The steel wire rope is an aviation steel wire rope, and the symmetrically arranged aviation steel wire ropes are twisted in opposite directions.

7. The halogen-free, low-smoke, flame-retardant, and termite-proof elevator traveling flat cable according to claim 1, characterized in that: The center of the video cable is a soft copper conductor, and the outer surface of the soft copper conductor is extruded with a halogen-free, low-smoke, cross-linked polyolefin flame-retardant insulation layer.

8. The halogen-free, low-smoke, flame-retardant, and termite-proof elevator traveling flat cable according to claim 1, characterized in that: The control unit in the flat outer protective layer includes three groups of control wires located on the left side of the flat outer protective layer and three groups of control wires located on the right side of the flat outer protective layer.

9. The halogen-free, low-smoke, flame-retardant, and termite-proof elevator traveling flat cable according to claim 1, characterized in that: The communication unit includes two symmetrical communication line groups in the middle of the flat outer protective layer.

10. The halogen-free, low-smoke, flame-retardant, and termite-proof elevator traveling flat cable according to claim 1, characterized in that: The raw materials for making the halogen-free low-smoke elastomer cross-linked polyolefin anti-termite flame-retardant sheath material and the halogen-free low-smoke cross-linked polyolefin flame-retardant material include polyolefin resin, coupling agent, flame retardant, stabilizer, smoke suppressant and lubricant.

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