WO2017028376A1

WO2017028376A1 - Flat elevator cable and manufacturing method thereof

Info

Publication number: WO2017028376A1
Application number: PCT/CN2015/093265
Authority: WO
Inventors: 曹中; 陈金根; 于荣标
Original assignee: 南通中尧特雷卡电梯产品有限公司
Priority date: 2015-08-14
Filing date: 2015-10-29
Publication date: 2017-02-23
Also published as: CN105047271A; CN105047271B

Abstract

A flat elevator cable comprises sequentially from inside to outside: a metal conducting core (1), an insulating layer (2), a protective jacket layer (8); the insulating layer and the protective jacket layer are made of a PVC material; a carbon fiber layer (3) is coated outside the insulating layer; a filling layer (4) is arranged between the carbon fiber layer and the protective jacket layer, and the filling layer is made of polypropylene added with alpha-alumina. The carbon fiber layer is made of soft carbon fibers, and a talcum powder layer (5) is arranged between the filling layer and the protective jacket layer. The flat elevator cable also includes tearing ropes (6), and the tearing ropes are arranged in the protective jacket layer. On the one hand, the tensile strength of the cable is enhanced and the service life of the cable is prolonged; on the other hand, the signal transmission stability of the cable is improved and then the safety of the elevator running is improved, and the elevator maintenance cost is also lowered, thereby resources being saved and efficiency being improved.

Description

Elevator flat cable line and preparation method thereof

Technical field

The invention relates to the technical field of cable lines, in particular to an elevator flat cable line and a preparation method thereof.

Background technique

During the operation of the elevator, the elevator cable moves up and down along with the elevator to provide working power for the elevator. The faster the elevator moves, the greater the resistance of the cable, and the more frequent the cable is pulled, the longer the regular lifting After that, there may be breaks and damages, causing power outages or other functions to be affected, which may cause serious casualties. In recent years, elevator accidents have occurred frequently, and accidents involving casualties have occurred. As a cable for the accompanying components of the elevator, it plays a vital role in the normal operation of the elevator.

Since the elevator car is a nearly closed narrow space, and there are many cables such as control, lighting, and fan in the elevator, this has higher requirements on the tensile strength of the cable. Because half of the elevator cable is used for extension, the high-rise elevator can be up to more than 100 meters, and the self-weight of the one-meter cable is nearly 100 kilograms, so the cable must have sufficient tensile strength. If the strength of the elevator cable is not enough, it may be caused by gravity during the long-term pulling process, which may eventually lead to partial line breakage and cause a safety accident. Moreover, in the process of the cable moving up and down with the elevator, there will be a section of the bending deformation caused by the force of gravity, resulting in changes in electrical parameters such as impedance and distributed capacitance of the cable. If the bending resistance of the elevator is not good, the parameters change greatly when the cable is subjected to force deformation, which may cause impedance mismatch, signal attenuation or signal reflection, resulting in signal interference and serious elevator safety accidents.

Chinese Patent No. 201220537704.9 discloses a cable wire arranging device, characterized in that the aligning device has an equal-section structure in the longitudinal direction, the cross-section has at least two sets of mounting grooves, and each set of mounting grooves is composed of at least two mounting holes. The mounting holes in each set of mounting slots are in radial communication. The prior art has a plurality of sets of mounting slots in the rubber sleeve, and each set of slots is formed by at least two mounting holes, and the cable wires are disposed in the mounting holes, thereby enhancing the tensile strength of the flat elevator cable, The cable core is not easy to break the core during frequent movements. However, the cable can be heated due to the resistance during use, which causes the cable temperature to rise, which in turn causes the insulation layer and the protective layer to age too fast, thus affecting the service life of the elevator cable.

Chinese patent 201220163034.9 discloses a halogen-free low-smoke flame-retardant cable for an elevator. The technical proposal is: a novel halogen-free low-smoke flame-retardant elevator cable, comprising a sheath and a plurality of cable cores arranged in parallel in the sheath, wherein the core is an inner conductor and is coated on the outer circumference of the inner conductor Insulating layer; its characteristics There is also a refractory layer between the sheath and the plurality of cable cores, the refractory layer being composed of a refractory mica tape wrapped around the periphery of the cable core. The sheath is a halogen-free low-smoke flame-retardant polyolefin sheath. The insulating layer is a halogen-free low-smoke flame-retardant polyolefin insulating layer. The elevator cable provided by the technical solution has high fire safety performance and can improve the safety performance of the elevator operation. However, its tensile strength is low, which affects the service life of the elevator cable.

None of the above prior art solutions fundamentally solve the problem of low tensile strength and low aging resistance of elevator cables.

Summary of the invention

In order to overcome the problems of low tensile strength and low aging resistance existing in the prior art, the present invention provides an elevator flat cable and a preparation method thereof.

The technical solution of the present invention is: an elevator flat cable line, which comprises, in order from the inside to the outside, a metal guiding core, an insulating layer and a protective sleeve layer, wherein the insulating layer and the protective sleeve layer are made of PVC material, and are characterized in that: The outer portion of the insulating layer is further coated with a carbon fiber layer; and a filling layer is further disposed between the carbon fiber layer and the protective cover layer, and the filling layer is a polypropylene layer to which α-alumina is added.

Further, the carbon fiber layer is a soft carbon fiber.

Further, a talc layer is disposed between the filling layer and the protective cover layer.

Further, the elevator flat cable further includes a tear cord, the tear cord being located in the protective jacket layer.

As an optional embodiment of the present invention, the tear cord is also a mesh structure, located in the protective cover layer, covering the carbon fiber layer.

Further, as an optional implementation manner of the present invention, the elevator flat cable further includes a communication cable, wherein the communication cable includes an inner conductor, an inner insulation, a filler, a shielding layer, and a sheath, and the inner conductor is a copper wire. The inner insulating skin is a silicone rubber, the filler is polypropylene, the shielding layer is a metal copper mesh, and the outer skin is a PVC material.

As an optional implementation manner of the present invention, the elevator flat cable can also replace the communication cable with an optical cable.

Further, the elevator flat cable wire further includes a reinforcing wire rope.

Further, as an alternative embodiment of the present invention, a graphite layer may be used in place of the talc layer between the filling layer and the protective cover layer.

The invention also discloses a preparation method of the elevator flat cable line, which comprises the following steps:

1) forming an insulating layer by extruding a bundle of copper wire and a PVC insulating material;

2) the carbon fiber cloth is coated on the outside of the insulating layer to form an insulated core;

3) Arranging the insulated cores in the mold;

4) forming a filling layer by using an α-alumina-doped polypropylene material through an extrusion process;

5) The PVC protective sleeve, talcum powder and tearing rope are formed into a protective cover layer by an extrusion process.

Wherein, in the step 1), the insulating layer is formed to have a thickness of 0.44-06 mm and an outer diameter of 2.70-2.80 mm. The extrusion forming process of the insulating layer is set to eight temperature control intervals, the feeding zone is located in the first temperature zone, the head is located in the eighth temperature zone, and the temperature from the first temperature zone to the seventh temperature zone is gradually increased. The temperature in the eighth temperature zone is the same as the temperature in the fifth temperature zone. The temperatures from the first temperature zone to the eighth temperature zone are: 155 ° C, 160 ° C, 165 ° C, 170 ° C, 172 ° C, 173 ° C, 174 ° C, 172 ° C.

In the step 5), the protective sheath layer is formed to have a thickness of 0.7-1.5 mm. The extrusion forming process of the protective sleeve layer is set to nine temperature control intervals, the feeding zone is located in the first temperature zone, the head is located in the ninth temperature zone, and the temperature from the first temperature zone to the sixth temperature zone is gradually increased. The temperature in the sixth temperature zone and the seventh temperature zone are the same, the temperature in the eighth temperature zone is higher than that in the sixth and seventh temperature zones, and the temperature in the ninth temperature zone is lower than that in the eighth temperature zone. The temperatures from the first temperature zone to the eighth temperature zone are: 157 ° C, 163 ° C, 167 ° C, 170 ° C, 172 ° C, 173 ° C, 173 ° C, 176 ° C, 176 ° C.

Compared with the prior art, the beneficial effects of the present invention are:

(1) The structure of the elevator flat cable of the present invention contains a carbon fiber layer, which enhances the tensile strength of the ladder cable, and the tensile strength is three times that of the cable prepared by the conventional process. Moreover, in the long-term use process, no creep is generated, high temperature resistance, fatigue resistance, small expansion coefficient, and good anisotropy, thereby increasing the service life of the elevator cable. In addition, it also has excellent electromagnetic shielding performance. When the cable is deformed by force, it can prevent signal interference between the various cables, increase the stability of signal transmission, and ensure the safety of the elevator operation.

(2) The structure of the elevator flat cable of the present invention contains a polypropylene-filled layer doped with α-alumina, which can enhance the anti-aging property of the packed layer, increase the service life of the cable, and also reduce the preparation of the cable. cost.

(3) The structure of the elevator flat cable of the present invention contains a talcum powder layer, which can offset the expansion effect between the cable core and the protective sheath layer, reduce the stress generated by the cable line, and improve the service life of the cable. Life.

(4) The structure of the elevator flat cable of the present invention contains a graphite layer, which can offset the expansion between the inner core of the cable and the protective sleeve, and on the other hand, facilitates the timely conduction and diffusion of heat generated inside the cable. Go out to prevent local overheating inside the cable, causing the cable to age and affect its service life.

(5) The structure of the elevator flat cable of the present invention contains a reinforcing wire rope, which further improves the tensile strength of the cable.

(6) The elevator flat cable provided by the invention increases the tensile strength of the cable and prolongs the service life of the cable; on the other hand, improves the stability of the transmission signal of the cable, thereby improving the operation of the elevator. Safety also reduces the maintenance cost of the elevator, which saves resources and improves efficiency.

DRAWINGS

1 is a schematic structural view of an elevator flat cable line according to Embodiment 1 of the present invention;

2 is a schematic structural view of an elevator flat cable line according to Embodiment 2 of the present invention;

3 is a schematic structural view of a communication cable in an elevator flat cable line structure in Embodiment 2 of the present invention;

4 is a flow chart showing a process for preparing an elevator flat cable according to Embodiment 4 of the present invention;

Figure 5 is a flow chart showing a process for preparing an elevator flat cable according to Embodiment 5 of the present invention;

6 is a flow chart showing a process for preparing an elevator flat cable according to Embodiment 6 of the present invention;

7 is a flow chart showing a process for preparing an elevator flat cable according to Embodiment 7 of the present invention;

In Fig. 1 and Fig. 2, reference numerals indicate: metal core 1, insulating layer 2, carbon fiber layer 3, filling layer 4, talc layer 5, tearing rope 6, steel cord 7, protective sheath 8, communication cable 9 ;

In Fig. 3, reference numerals indicate an inner conductor 91, an inner insulating sheath 92, a filler 93, a shield layer 94, and a sheath 95.

detailed description

The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Example 1

As shown in FIG. 1 , an elevator flat cable line includes a metal core 1, an insulation layer 2 and a protective cover layer 8 from the inside to the outside, wherein the insulation layer 2 and the protective cover layer 8 are made of PVC material and insulated. The outer layer 2 is also coated with a carbon fiber layer 3; the carbon fiber layer 3 and the protective cover layer 8 further have a filling layer 4, and the filling layer 4 It is a polypropylene to which α-alumina is added. The carbon fiber layer 3 is a soft carbon fiber.

Furthermore, a talc layer 5 is present between the filling layer 4 and the protective sheath layer 8.

The elevator flat cable also includes a tear cord 6, a reinforcing wire rope 7, and the tear cord 6 is located in the protective sheath layer 8.

The structure of the elevator flat cable of the present invention contains a carbon fiber layer, which enhances the tensile strength of the ladder cable, and the tensile strength is three times that of the cable prepared by the common process. Moreover, in the long-term use process, no creep is generated, high temperature resistance, fatigue resistance, small expansion coefficient, and good anisotropy, thereby increasing the service life of the elevator cable. In addition, it also has excellent electromagnetic shielding performance. When the cable is deformed by force, it can prevent signal interference between the various cables, increase the stability of signal transmission, and ensure the safety of the elevator operation.

Example 2

As shown in FIG. 2, an elevator flat cable line includes a metal core 1, an insulation layer 2, and a protective cover layer 8 from the inside to the outside, wherein the insulation layer 2 and the protective cover layer 8 are made of PVC material and insulated. The outer layer 2 is also coated with a carbon fiber layer 3; the carbon fiber layer 3 and the protective cover layer 8 further have a filling layer 4, and the filling layer 4 is a polypropylene layer to which α-alumina is added. The carbon fiber layer 3 is a soft carbon fiber.

The elevator flat cable also includes a tear line 6, a reinforcing wire rope 7, a communication cable 9, and a tear cord 6 in the protective cover 8. As shown in FIG. 3, the communication cable 9 includes an inner conductor 91, an inner insulation 92, a filler 93, a shielding layer 94, and a sheath 95. The inner conductor 91 is a copper wire, the inner insulation 92 is a silicone rubber, and the filler 93 is a polysilicon. The propylene, the shielding layer 94 is a metal copper mesh, and the outer skin 95 is a PVC material.

The structure of the elevator flat cable of the present invention contains a polypropylene filling layer doped with α-alumina, which can enhance the anti-aging property of the filling layer, increase the service life of the cable, and also reduce the manufacturing cost of the cable. Moreover, the layer containing talc can offset the expansion between the inner core of the cable and the protective sheath, reduce the stress generated by the cable, and improve the service life of the cable.

Example 3

Referring to FIG. 1 , an elevator flat cable line includes a metal core 1, an insulation layer 2 and a protective cover layer 8 from the inside to the outside, wherein the insulation layer 2 and the protective cover layer 8 are made of a PVC material, and the insulation layer 2 The outer portion is also coated with a carbon fiber layer 3; a filler layer 4 is further disposed between the carbon fiber layer 3 and the protective cover layer 8, and the packed layer 4 is a polypropylene layer to which α-alumina is added. The carbon fiber layer 3 is a soft carbon fiber.

Furthermore, a graphite layer 5 is present between the filling layer 4 and the protective sheath layer 8.

The structure and function of the other components are the same as in the first embodiment.

The structure of the elevator flat cable line of the invention contains a graphite layer, which can offset the expansion effect between the inner core of the cable and the protective sleeve layer on the one hand, and facilitates the conduction and diffusion of heat generated inside the cable in time to prevent The inside of the cable is partially overheated, causing the cable to age and affect its service life.

Example 4

As shown in FIG. 4, a method for preparing an elevator flat cable includes the following steps:

3) Arranging the insulated cores in the mold;

Wherein, in the step 1), the thickness of the insulating layer formed is 0.44-06 mm, and the outer diameter is 2.70-2.80 mm. The extrusion forming process of the insulating layer is set to eight temperature control intervals, the feeding zone is located in the first temperature zone, the head is located in the eighth temperature zone, and the temperature from the first temperature zone to the seventh temperature zone is gradually increased. The temperature in the eighth temperature zone is the same as the temperature in the fifth temperature zone. The temperatures from the first temperature zone to the eighth temperature zone are: 155 ° C, 160 ° C, 165 ° C, 170 ° C, 172 ° C, 173 ° C, 174 ° C, 172 ° C.

The specific process parameters are shown in Table 1 below.

Table 1 insulation layer extrusion temperature

The specific process parameters are shown in Table 2 below.

Table 2 protective jacket extrusion temperature

Example 5

As shown in FIG. 5, a method for preparing an elevator flat cable includes the following steps:

3) Arranging the insulated cores in the mold;

5) The PVC protective sleeve, talcum powder, tearing rope and communication cable are formed into a protective cover layer by an extrusion process.

Wherein, in the step 1), the bundle copper wire cross section: 1.0 mm ² can be arranged into 6, 12, 24, and the like. The thickness of the insulating layer formed is 0.44-06 mm, and the outer diameter is 2.70-2.80 mm. Insulation color separation: the fifth insulated core is green/yellow, and the other cores are black core.

The process conditions of the specific steps are the same as in the fourth embodiment.

Example 6

As shown in FIG. 6, a method for preparing an elevator flat cable includes the following steps:

3) Arranging the insulated cores in the mold;

5) The PVC protective sleeve, talcum powder, tearing rope and steel wire rope are formed into a protective cover layer by an extrusion process.

The structure of the elevator flat cable line of the invention comprises a reinforcing wire rope, which further improves the cable line tensile strength.

Example 7

As shown in FIG. 7, a method for preparing an elevator flat cable includes the following steps:

3) Arranging the insulated cores in the mold;

5) The PVC protective sleeve, talcum powder, tearing rope, communication cable and steel wire rope are formed into a protective cover layer by an extrusion process.

By adopting the preparation method of the invention, on the one hand, the tensile strength of the cable is increased, and the service life of the cable is prolonged; on the other hand, the stability of the transmission signal of the cable line is improved, thereby improving the safety of the elevator operation and reducing the safety of the elevator operation. The maintenance cost of the elevator saves resources and improves efficiency.

The above description shows and describes a preferred embodiment of the present invention. As described above, it should be understood that the present invention is not limited to the form disclosed herein, and should not be construed as being Combinations, modifications, and environments are possible, and can be modified by the teachings of the above teachings or related art within the scope of the inventive concept described herein. All changes and modifications made by those skilled in the art are intended to be within the scope of the appended claims.

Claims

An elevator flat cable line, which comprises a metal core (1), an insulating layer (2) and a protective cover layer (8) in order from the inside to the outside, and the insulating layer (2) and the protective cover layer (8) are made of PVC material. The invention is characterized in that: the outer layer of the insulating layer (2) is further coated with a carbon fiber layer (3); the carbon fiber layer (3) and the protective cover layer (8) further have a filling layer (4) The packed layer (4) is a polypropylene to which α-alumina is added.
The elevator flat cable according to claim 1, characterized in that the talc layer (5) is provided between the filling layer (4) and the protective cover layer (8).
The elevator flat cable according to claim 2, characterized in that the elevator flat cable further comprises a tear cord (6), the tear cord (6) being located in the protective sheath layer (8).
The elevator flat cable according to any of claims 1-3, further comprising a communication cable comprising an inner conductor (91), an inner insulation (92), a filler (93), and a shielding layer (94). The outer skin (95), the inner conductor (91) is a copper wire, the inner insulating skin (92) is a silicone rubber, the filler (93) is a polypropylene, and the shielding layer (94) is a metallic copper. The net, the outer skin (95) is a PVC material.
The elevator flat cable according to claim 1, characterized in that the carbon fiber layer (3) is a soft carbon fiber.
The elevator flat cable according to claim 4, characterized in that said elevator flat cable further comprises a reinforcing wire rope (7).
The elevator flat cable according to claim 1, characterized in that the talc layer (5) between the filling layer (4) and the protective covering layer (8) is replaced by a graphite layer.
A method for preparing an elevator flat cable according to claim 3, comprising the steps of:

1) forming an insulating layer by extruding a bundle of copper wire and a PVC insulating material;

2) the carbon fiber cloth is coated on the outside of the insulating layer to form an insulated core;

3) Arranging the insulated cores in the mold;

4) forming a filling layer by using an α-alumina-doped polypropylene material through an extrusion process;

5) The PVC protective sleeve, talcum powder and tearing rope are formed into a protective cover layer by an extrusion process.
The method for preparing an elevator flat cable according to claim 8, wherein in the step 1), the insulating layer is formed to have a thickness of 0.44-06 mm and an outer diameter of 2.70-2.80 mm.
A method of manufacturing an elevator flat cable according to claim 8, wherein said step 5) The thickness of the protective cover layer formed is 0.7-1.5 mm.