CN201927387U - Movement-resistant anti-torsion cabtyre flexible electric cable for elevator - Google Patents

Abstract

A movement-resistant and torsion-resistant rubber-sheathed flexible cable for elevators, comprising an insulated power core 1, an insulated ground core 2, a filling layer 3, a non-woven wrapping layer 4 and a sheath layer 5, the insulated power core 1 and the insulated The outer diameter of the ground core 2 is the same. After the cable is twisted, the filling layer 3 of the cable core gap is filled with non-vulcanized rubber strips, and the wrapping layer 4 on the outer periphery of the cable core is wrapped with non-woven fabric, and the rubber sheath Layer 5 is extruded on the outer periphery of the wrapped cabled core. Because the utility model reduces the pitch diameter ratio of bundled strands and re-twisted stranded conductors, the outer diameter of the insulated ground wire core is consistent with the outer diameter of the insulated power wire core, and is filled with unvulcanized rubber strips, which greatly improves The bending resistance and torsion resistance of the cable have been improved. It has been proved by the test that the utility model has passed the torsion resistance test _of the rubber winding machine for 10,000 times. Long life, easy to strip when cable splicing.

Description

A movement-resistant and torsion-resistant rubber-sheathed soft cable for elevators

technical field

The utility model relates to a rubber-sheathed flexible cable for a building construction elevator, in particular to a movement-resistant and torsion-resistant rubber-sheathed flexible cable for an elevator.

Background technique

The cables used in construction elevators not only have good high and low temperature resistance due to long-term use outdoors, but also because the cables often bend back and forth frequently, and are frequently twisted with the change of wind direction, so the The cable also has high requirements for resistance to movement and torsion.

The structure of the existing multi-core rubber-sheathed flexible cable is shown in Figures 1 and 2, including an insulated power core 1, an insulated ground core 2, a filling layer 3, a wrapping layer 4 and a sheath layer 5. The cable conductor adopts GB/ The fifth category of flexible conductors in the T3956-2008 standard, the conductor bundles are first twisted into bundled wires, and then several strands of bundled wires are twisted into twisted conductors, and the outer periphery is then extruded with an insulating layer to form an insulated power core 1 or Insulated ground core 2, namely: insulated power core 1 is composed of power core 11 and power core insulation layer 12, insulated ground core 2 is composed of ground core 21 and ground core insulation layer 22, insulated power core 1 and the insulated ground core 2 are cabled and stranded to form a cable core. After filling the filling layer 3 in the void of the cable core, the wrapping layer 4 on the outer periphery of the cable core is wrapped with non-woven fabrics of 0.15 mm to 0.20 mm in an overlapping manner. Then extrude the rubber sheath layer 5 to form a rubber sheath flexible cable.

The disadvantages of the rubber-sheathed flexible cable of this structure are:

1. The softness of the cable cannot meet the requirements of frequent movement and torsion resistance of the cable: the pitch diameter ratio of existing cables is 25 to 30 times when the conductor bundles are twisted into strands, and several bundles of strands are re-twisted into strands When the conductor is used, the pitch diameter ratio of the inner layer is 16 to 19 times, and the pitch diameter ratio of the outermost layer is 14 to 16 times, that is, the pitch diameter ratio of the bundled wire, the pitch diameter ratio of the inner layer of the stranded conductor, and the pitch diameter ratio of the outermost layer Both are too large, resulting in that the softness of the conductor cannot meet the requirements of frequent movement and torsion resistance of the cable;

2. The ground core of the cable is easily broken: the nominal cross section of the existing cable is smaller than that of the power core, and the thickness of the insulation layer of the ground core is smaller than that of the power core insulation, so that the insulation The outer diameter of the ground core is smaller than the outer diameter of the insulated power core, resulting in uneven stress on the cable during use, which can easily cause the ground core to break and shorten the service life of the cable;

3. The service life of the cable is short: the filling layer of the existing cable is filled with fiber to keep the cable round, and the outer circumference of the cable is wrapped with 0.15-0.20mm non-woven fabric. The pitch diameter ratio during cable twisting is too large, generally 12 to 14 times, resulting in the insulated power core and insulated ground core and the rubber sheath layer not being tight, and when the cable is frequently bent and twisted, each position shifts. It will cause the cable to be packaged, the conductor to be broken, and the rubber sheath to be damaged, which will greatly shorten the service life of the cable.

Contents of the invention

The purpose of the utility model is to overcome the above-mentioned deficiencies of the prior art, and provide a flexible cable with a high flexibility and a long service life for elevators with a movement-resistant and torsion-resistant rubber sheath.

The technical solution of the utility model is: a flexible rubber sheathed flexible cable with resistance to movement and torsion for elevators, including an insulated power core, an insulated ground core, a filling layer, a wrapping layer and a rubber sheath layer, and the insulated power core is composed of a power The insulated ground core is composed of the ground core and the ground core insulation layer. The nominal cross-section of the ground core is smaller than the nominal cross-section of the power core, and the thickness of the ground core insulation is greater than The thickness of the insulation layer of the power core, the insulated power core and the insulated ground core are cabled and stranded to form a cable core. Cloth is wrapped, and the rubber sheath layer is extruded on the outer periphery of the cabled core after wrapping.

The outer diameter of the insulated power core is the same as that of the insulated ground core.

The cable conductor adopts the fifth type of soft conductor in the GB/T3956-2008 standard, and the pitch diameter ratio of the conductor bundles is 12 to 16 times when the conductor bundles are twisted into a bundle of strands; The direction of twisting is opposite to that of double stranding, and the stranding direction of inner and outer layers is opposite. When twisting, the pitch diameter ratio of the inner layer is 10 to 14 times, and the pitch diameter ratio of the outermost layer is 8 to 12 times; the outer circumference of the stranded conductor is then extruded with an insulating layer.

The insulated power core and the insulated ground core are cabled and twisted to form a cable core, and the pitch diameter ratio of the cable core is 8 to 10 times during cable twisting.

After the cable is twisted, the filling layer of the cable core gap is filled with non-vulcanized rubber strips.

The wrapping layer on the outer periphery of the cabled core is wrapped with non-woven fabric with a thickness of 0.07-0.15mm, and the gap is 0.5-1 bandwidth.

In the utility model, due to the reduction of the pitch diameter ratio of the bundled strands and the pitch ratio of the re-twisted conductors, the stranding direction of the bundled strands is opposite to that of the re-twisted conductors, and the inner and outer layers of the strands are re-twisted. The stranding direction is opposite; increase the thickness of the insulating layer of the ground core, so that the outer diameter of the insulated ground core is consistent with the outer diameter of the insulated power core; the cable core is filled with unvulcanized rubber strips, and the cable core is wrapped with gap-type non-woven fabric , and then extrude the outer rubber sheath, so that the cable core, the non-vulcanized rubber strip and the outer rubber sheath become a whole and other technical measures, which greatly improve the bending resistance and torsion resistance of the cable. 10,000 times of reciprocating movement around the machine, anti-torsion test, no cracks on the surface of the cable, no breakdown after 5 minutes of withstand voltage of 2.5U ₀ , and long service life of the cable.

The details of the present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

Description of drawings

Figure 1 is a structural schematic diagram of the existing four-core rubber-sheathed flexible cable;

Figure 2 is a schematic diagram of the three-dimensional structure of the existing four-core rubber-sheathed flexible cable;

Fig. 3 is a schematic cross-sectional structure diagram of a four-core rubber-sheathed flexible cable of the utility model;

Figure 4 is a three-dimensional structural schematic diagram of a four-core rubber-sheathed flexible cable of the present invention;

Figure 5 is a schematic cross-sectional structure diagram of a five-core rubber-sheathed flexible cable of the present invention;

Figure 6 is a schematic diagram of the three-dimensional structure of the five-core rubber-sheathed flexible cable of the present invention.

Detailed ways

Example 1:

As shown in Figures 3 and 4: a movement-resistant and torsion-resistant four-core rubber-sheathed flexible cable for elevators, including three insulated power cores 1, one insulated ground core 2, a filling layer 3, a wrapping layer 4 and a sheath Layer 5, the conductor is made of fine copper wire with a diameter of 0.15~0.30mm. When conducting a conductor, the twisting direction of the strands is opposite to that of the double twisting, and the twisting direction of the inner and outer layers is opposite. When double twisting, the pitch diameter ratio of the inner layer is 10 times, and the outermost bundle of strands is twisted to the right. Re-twisted to the left, the pitch diameter ratio is 8 times; the insulation layer is extruded on the outer periphery of the stranded conductor to form the insulated power core 1 or the insulated ground core 2, that is: the insulated power core 1 is composed of the power core 11 and the power line core insulating layer 12, the insulated ground core 2 is made up of a ground core 21 and a ground core insulating layer 22, the nominal cross section of the ground core 21 is smaller than the nominal cross section of the power core 11, and the ground core insulating layer 22 is The thickness is greater than the thickness of the insulating layer 12 of the power core, and the outer diameter of the insulated power core 1 and the insulated ground core 2 are the same to increase the stability of the cable structure; the insulated power core 1 and the insulated ground core 2 are twisted together For the cabled core, the pitch diameter ratio is 8 times when the cable is stranded. After the cable is stranded, the filling layer 3 of the cable core gap is filled with non-vulcanized rubber strips, and the wrapping layer 4 on the outer periphery of the cabled core is 0.07mm Thick non-woven fabric is wrapped in a gap type, with a gap of 0.5 bandwidth, which facilitates the tight combination of the cable core and the sheath layer 5, greatly increases the resistance to movement and torsion of the cable, and facilitates the cable joint during construction; the rubber sheath The sheath layer 5 is extruded on the outer circumference of the wrapped cable core, and the sheath layer 5 is made of synthetic rubber with a tensile strength of 10-15MP to increase the ability of the cable to withstand large external forces.

Example 2:

As shown in Figures 5 and 6: a movement-resistant and torsion-resistant five-core rubber-sheathed flexible cable for elevators, including three insulated power cores 1, two insulated ground cores 2, a filling layer 3, a wrapping layer 4 and a sheath Layer 5, the conductor is made of fine copper wire with a diameter of 0.15~0.30mm. When the conductor is used, the twisting direction of the strands is opposite to that of the re-twisting, and the twisting direction of the inner and outer layers is opposite. When re-twisting, the pitch diameter ratio of the inner layer is 14 times; Re-twisted to the left, the pitch diameter ratio is 12 times; the insulation layer is extruded on the outer periphery of the stranded conductor to form the insulated power core 1 or the insulated ground core 2, that is: the insulated power core 1 is composed of the power core 11 and the power line core insulating layer 12, the insulated ground core 2 is made up of a ground core 21 and a ground core insulating layer 22, the nominal cross section of the ground core 21 is smaller than the nominal cross section of the power core 11, and the ground core insulating layer 22 is The thickness is greater than the thickness of the power core insulation layer 12; the insulated power core 1 and the insulated ground core 2 are cabled and twisted into a cable core, and the pitch diameter ratio is 10 times when the cable is twisted. After the cable is twisted, the cable core The filling layer 3 of the gap is filled with non-vulcanized rubber strips, and the wrapping layer 4 on the outer periphery of the cable core is wrapped with a non-woven fabric with a thickness of 0.15 mm. The gap is a wide band, which is convenient for the cable core and the sheath layer 5 to be tightly Combined, the resistance to movement and torsion of the cable is greatly increased, and it is convenient for the joint of the cable in construction; the rubber sheath layer 5 is extruded on the outer periphery of the cabled core after wrapping, and the sheath layer 5 adopts tensile strength 10~15MP synthetic rubber to increase the ability of the cable to withstand large external forces.

Claims (10)

1. a lift moves antitorque commentaries on classics rubber sleeve flexible cable with anti-, comprise insulation power core, the Ground wire with insulation ocver core, packed layer, nonwoven fabrics lapping layer and restrictive coating, insulation power core is made up of power core and power line core insulation layer, the Ground wire with insulation ocver core is made up of ground core and ground wire core insulation layer, the nominal cross of ground core is less than the nominal cross of power core, insulation power core is twisted into into cable core with Ground wire with insulation ocver core stranding, packed layer is filled in cable core space, the stranded back of stranding, become the lapping layer of cable core periphery wrapped with nonwoven fabrics, the rubber sheath layer is extruded in the periphery of the one-tenth cable core after wrapped, it is characterized in that the thickness of the thickness of ground wire core insulation layer greater than power line core insulation layer.

2. lift according to claim 1 moves antitorque commentaries on classics rubber sleeve flexible cable with anti-, it is characterized in that insulating power core and Ground wire with insulation ocver core outer through identical.

3. lift according to claim 1 and 2 moves antitorque commentaries on classics rubber sleeve flexible cable with anti-, and lay ratio is 12～16 times when it is characterized in that conductor bundle is twisted into bundle strand; Some bursts of bundle strands are when being twisted into stranded conductor again, the strand strand to multiple strand strand to opposite, the ectonexine strand is on the contrary, the internal layer lay ratio is 10～14 times when twisting again; Outermost layer bundle strand dextrad bundle strand, left-hand twists again when being twisted into stranded conductor again, and lay ratio is 8～12 times.

4. lift according to claim 1 and 2 moves antitorque commentaries on classics rubber sleeve flexible cable with anti-, and the power core that it is characterized in that insulating is twisted into into cable core with Ground wire with insulation ocver core stranding, and the lay ratio of one-tenth cable core was 8～10 times when stranding was stranded.

5. lift according to claim 3 moves antitorque commentaries on classics rubber sleeve flexible cable with anti-, and the power core that it is characterized in that insulating is twisted into into cable core with Ground wire with insulation ocver core stranding, and the lay ratio of one-tenth cable core was 8～10 times when stranding was stranded.

6. lift according to claim 1 and 2 moves antitorque commentaries on classics rubber sleeve flexible cable with anti-, it is characterized in that stranding is stranded after, the packed layer in cable core space adopts the rubber strip that does not vulcanize to fill.

7. lift according to claim 3 moves antitorque commentaries on classics rubber sleeve flexible cable with anti-, it is characterized in that stranding is stranded after, the packed layer in cable core space adopts the rubber strip that does not vulcanize to fill.

8. lift according to claim 4 moves antitorque commentaries on classics rubber sleeve flexible cable with anti-, it is characterized in that stranding is stranded after, the packed layer in cable core space adopts the rubber strip that does not vulcanize to fill.

9. lift according to claim 5 moves antitorque commentaries on classics rubber sleeve flexible cable with anti-, it is characterized in that stranding is stranded after, the packed layer in cable core space adopts the rubber strip that does not vulcanize to fill.

10. lift according to claim 1 and 2 adopts the thick nonwoven fabrics clearance-type of 0.07～0.15mm wrapped with anti-mobile antitorque commentaries on classics rubber sleeve flexible cable, the lapping layer that it is characterized in that into the cable core periphery, and the gap is a 0.5-1 bandwidth.

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