CN211150122U

CN211150122U - Night visual ultralow-temperature-resistant mobile flexible cable

Info

Publication number: CN211150122U
Application number: CN201921143269.XU
Authority: CN
Inventors: 钱章兴; 王兵兵; 丁国生
Original assignee: Shanghai Lanhao Electric Co ltd
Current assignee: Shanghai Lanhao Electric Co.,Ltd.
Priority date: 2019-07-20
Filing date: 2019-07-20
Publication date: 2020-07-31
Anticipated expiration: 2029-07-20

Abstract

The utility model discloses a night visual ultralow temperature resistant mobile flexible cable, which comprises a central tensile reinforcement core, a cable core surrounding the reinforcement core, and an inner sheath, a fluorescence coating layer and an outer sheath which are sequentially wrapped outside the cable core from inside to outside. The utility model discloses a power cable core, including the cable core, the cable core is formed with many sinle silk spiral transposition as the center with central tensile reinforcement core, the transposition pitch ratio of cable core is less than or equal to 8 times, many sinle silks are formed by a plurality of power sinle silks and a plurality of earth core transposition, a plurality of power sinle silks are around central tensile reinforcement core, a plurality of earth core transposition are in power sinle silk gap, the fluorescence coating comprises reflection of light priming paint and phosphor layer, the oversheath is transparent sheath. The cable greatly improves the visibility of the cable at night, prevents the cable from being rolled by engineering vehicles, has the characteristics of ultralow temperature resistance, high flexibility and high flexibility at ultralow temperature, repeated winding and unwinding on reels or winding drums, no cracking and the like.

Description

Night visual ultralow-temperature-resistant mobile flexible cable

Technical Field

The utility model relates to a mine or shield structure are cable for excavating equipment, concretely relates to visual resistant ultra-low temperature removal flexible cable night.

Background

With the increasing level of technology, the environment for human mining is moving towards more severe places. This has higher requirements for both engineering equipment and equipment supporting facilities. In particular, the supporting facilities such as cables and the like need to have some special functions. For example, in the Hurenbel area of Mongolia in China, the low temperature is kept at about minus 50 ℃ for a long time in winter, and the cable is required to have extremely high low temperature resistance. For the mobile cable for the reel, the cable is required not only to be cracked but also to have certain flexibility at the low temperature, so as to meet the winding requirement of the reel.

On the other hand, in winter in extremely cold areas, the night is long and short, often two thirds of the time of a day is in the night, this brings very big inconvenience for cable laying, operation and maintenance, needs to have a special function's cable to make this cable can be seen clearly at night to can ensure that the cable is not rolled in the operation process, ensure cable safe handling.

At present, cables which can be flexibly used in a low-temperature environment of 50 ℃ below zero do not exist at home and abroad, and users feed back that the surfaces of cable sheaths of most cables are seriously cracked after being bent and rolled for several times, so that the service life of the cables is seriously shortened, and even great potential safety hazards are brought to field staff.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: the utility model aims at solving the not enough among the prior art, provide one kind and be applicable to the mobile cable that can relapse crooked use under the 50 ℃ below zero ultra-low temperature environment, the cable of preparing through the technological improvement can satisfy the requirement that the reel used in the low temperature environment completely to original fluorescence reflection of light at night is visible technical, has solved open-air mining industry and has used inconvenient difficult problem night very much.

The technical scheme is as follows: a night visual ultralow temperature resistant mobile flexible cable comprises a central tensile reinforced core, a cable core surrounding the reinforced core, and an inner sheath, a fluorescent coating layer and an outer sheath which are sequentially wrapped outside the cable core from inside to outside. The utility model discloses a cable core, including the cable core, the cable core is formed with many sinle silk spiral transposition as the center with central tensile reinforcement core, the transposition pitch ratio of cable core is less than or equal to 8 times, the cable core is formed by a plurality of power sinle silks and a plurality of earth core transposition, a plurality of power sinle silks are all around central tensile reinforcement core, a plurality of earth core transposition are in power sinle silk gap, the fluorescence coating comprises reflection of light priming paint and phosphor layer, the even coating in the surface of inner sheath of reflection of light priming paint, the phosphor layer adhesion is on reflection of light priming paint, the oversheath is transparent sheath.

Furthermore, the central tensile strength reinforcing core is formed by stranding high-strength fiber ropes, and the breaking force of the central tensile strength reinforcing core is larger than 5000N.

Furthermore, the power wire core is composed of a power wire conductor, a power wire insulator, a copper foil mylar tape wrapped outside the insulator and a metal shielding layer surrounding the outside of the copper foil mylar tape, the twisting pitch ratio of the power wire conductor is 15-20 times, ethylene propylene diene monomer with the ethylene content being less than or equal to 40% is used as a base body for the power wire insulator, liquid polybutadiene is used as a plasticizer, the metal shielding layer is woven by copper wires, and the coverage rate of the copper wires is greater than 85%.

Furthermore, the ground wire core is composed of a ground wire core conductor and nitrile semi-conductive rubber wrapped outside the ground wire core conductor, the pitch diameter ratio of a binding wire of the ground wire core conductor is 25-30 times, and the twisting pitch diameter ratio is 15-20 times.

Furthermore, the inner sheath is made of high-strength low-temperature-resistant silicon rubber, the strength of the high-strength low-temperature-resistant silicon rubber is more than 10MPa, and the glass transition temperature is lower than 70 ℃ below zero.

Further, the outer sheath is made of a cold-resistant transparent polyether type thermoplastic polyurethane elastomer TPU, the strength of the cold-resistant transparent polyether type thermoplastic polyurethane elastomer TPU is greater than 25MPa, the elongation of the cold-resistant transparent polyether type thermoplastic polyurethane elastomer TPU is greater than 600%, the hardness of the cold-resistant transparent polyether type thermoplastic polyurethane elastomer TPU is not more than 85 ℃, and the glass transition temperature of the cold-resistant transparent polyether type thermoplastic polyurethane elastomer TPU is lower than 60 ℃ below zero.

Has the advantages that: the utility model discloses visual resistant ultra-low temperature mobile cable at night can realize carrying out the reel rolling action for a long time in 50 ℃ below zero environment, and high flexibility super low temperature resistant sheath material ensures that the cable does not ftracture at low temperature reciprocating motion, and the polyether type TPU material of adoption not only ensures the compliance of cable at low temperature, still has very excellent wear resistance when high temperature in summer simultaneously, has avoided the rubber materials to pursue the not enough of wear resistance when low temperature; the central tensile reinforced core is formed by twisting high-strength fiber ropes, so that the tensile resistance of the cable at low temperature is improved;

the fluorescent coating layer is arranged between the inner sheath and the outer sheath, the outer sheath is made of transparent TPU, the thickness is as thin as possible on the premise of meeting the wear-resistant requirement, the cable is ensured to have a light reflecting effect permanently, the defect that a part of cable is not durable due to wrapping of a fluorescent belt outside the sheath is avoided, and permanent safety protection is provided for the cable.

This cable improves the visual ability at night of cable, improves the warning ability, prevents to be rolled by engineering vehicle to have resistant ultralow temperature and have high compliance at ultralow low temperature, can not ftracture at reel or reel rolling in-process, and cable tensile resistance intensity is high.

Drawings

FIG. 1 is a sectional view of the utility model;

0. the cable comprises a central tensile reinforced core, 1, a power wire core 11, a power wire conductor 12, a power wire insulator 13, a copper foil mylar tape 14, a metal shielding layer, 2, a ground wire core 21, a ground wire core conductor 22, butyronitrile semi-conductive rubber, 3, an inner sheath, 4, a fluorescent coating layer, 5 and an outer sheath.

Detailed Description

The technical scheme shown in figure 1 is as follows: an ultra-low temperature resistant mobile flexible cable visible at night, comprising: a central tensile reinforced core 0 surrounding the cable core outside the reinforced core, and an inner sheath 3, a fluorescent coating layer 4 and an outer sheath 5 which are sequentially wrapped outside the cable core from inside to outside, the cable core is formed by twisting a plurality of high-strength fiber ropes with a central tensile reinforced core 0 as the center, the twisting pitch diameter ratio of the cable core is less than or equal to 8 times, the cable core is formed by twisting a plurality of power wire cores 1 and a plurality of ground wire cores 2, the plurality of power wire cores 1 are twisted around a central tensile reinforced core 0, the plurality of ground wire cores 2 are stranded in the gaps of the power wire core 1, the fluorescent coating layer 4 consists of reflective primer and a fluorescent powder layer, the outer surface of the inner sheath 3 is uniformly wrapped by the reflective primer, the fluorescent powder layer is adhered to the reflective primer, and the outer sheath 5 is a transparent sheath.

In this example, the central tensile strength core 0 is formed by twisting high-strength fiber ropes, the tensile force of the central tensile strength core 0 is greater than 5000N, and any flexible rubber material can have adverse effect on the low-temperature bending performance, so that any buffer layer is not extruded outside the fiber ropes.

In the embodiment, the power wire core 1 consists of a power wire conductor 11, a power wire insulator 12, a copper foil mylar tape 13 wrapped outside the insulator and a metal shielding layer 14 surrounding the outside of the copper foil mylar tape 13, wherein the twist pitch ratio of the power wire conductor 11 is 15-20 times to ensure the flexibility of the conductor, ethylene propylene diene monomer with the ethylene content of less than or equal to 40% is adopted as a matrix of the power wire insulator 12 to ensure that the insulating material is not easy to crystallize and is more flexible at low temperature, liquid polybutadiene is selected as a plasticizer to further reduce the glass transition temperature of ethylene propylene rubber, so that the hardness of the ethylene propylene rubber at 50 ℃ below zero is not more than 80 ℃, and the elongation is more than 300%; the insulation is externally provided with a copper foil mylar tape as a wrapping shielding layer, so that the shielding effect is further ensured, the metal shielding layer 14 is wrapped outside the copper foil mylar tape 13, the metal shielding layer 14 is formed by weaving copper wires, the coverage rate of the copper wires is greater than 85%, and the metal shielding layer 14 is used as a main shielding layer of the power line.

In this example, the ground core 2 is composed of a ground core conductor 21 and semiconductive rubber 22 wrapped outside the ground core conductor 21, the diameter ratio of the strand pitch of the ground core conductor 21 is 25-30 times, and the diameter ratio of the strand pitch of the ground core conductor is 15-20 times, so that the overall flexibility of the cable is further improved, and the semiconductive rubber outside the ground core conductor is formed by extruding and wrapping the semiconductive rubber 22 which is resistant to low temperature.

In this example, the inner sheath 3 is made of high-strength low-temperature-resistant silicone rubber, the strength of the high-strength low-temperature-resistant silicone rubber is greater than 10MPa, the glass transition temperature is lower than minus 70 ℃, and the inner sheath 3 is ensured to have excellent flexibility and good tensile property at low temperature.

In this example, the outer sheath 5 is made of a cold-resistant transparent polyether thermoplastic polyurethane elastomer TPU, which has a strength of more than 25MPa, an elongation of more than 600%, a hardness of not more than 85 degrees, a glass transition temperature of less than 60 ℃ below zero, and a thickness as thin as possible while satisfying wear resistance requirements.

The stranding pitch-diameter ratio of the cable core is less than or equal to 8 times, the lower pitch-diameter ratio ensures the overall flexibility of the cable and the service life of the cable under bending, and the adverse effect of poor bending performance caused by the large pitch-diameter ratio of the conductor is compensated.

The reflective primer in the fluorescent coating layer 4 is firstly uniformly covered on the surface of the inner sheath 3, so that the fluorescent powder can be firmly adhered to the surface of the inner sheath 3. The fluorescent powder is high-refractive-index luminescent powder, has extremely strong retro-reflection performance, can directly reflect 85% of light back to the light source, can enable drivers and night operators with light sources to clearly see the cable at night or under the condition of poor visual field, and ensures the safe use of the cable.

The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiments, and although the present invention has been disclosed with the preferred embodiments, it is not limited to the present invention, and any skilled person in the art can make some modifications or equivalent embodiments without departing from the scope of the present invention, but all the technical matters of the present invention are within the scope of the present invention.

Claims

1. The utility model provides a visual resistant ultra-low temperature removal flexible cable night which characterized in that: the cable comprises a central tensile reinforced core, a cable core surrounding the reinforced core, and an inner sheath, a fluorescent coating layer and an outer sheath which are sequentially wrapped outside the cable core from inside to outside, wherein the cable core is formed by spirally stranding a plurality of wire cores taking the central tensile reinforced core as the center, the stranding pitch diameter ratio of the cable core is less than or equal to 8 times, the cable core is formed by stranding a plurality of power wire cores and a plurality of ground wire cores, the plurality of power wire cores are stranded around the central tensile reinforced core, the plurality of ground wire cores are stranded in a power wire core gap, the fluorescent coating layer is composed of a reflective primer and a fluorescent powder layer, the reflective primer is uniformly coated on the outer surface of the inner sheath, the fluorescent powder is adhered to the reflective primer, and the outer sheath is a transparent sheath.

2. The night-visible ultra-low temperature resistant mobile flexible cable of claim 1, wherein: the central tensile reinforced core is formed by stranding high-strength fiber ropes, and the breaking force of the central tensile reinforced core is greater than 5000N.

3. The night-visible ultra-low temperature resistant mobile flexible cable of claim 1, wherein: the power line core is composed of a power line conductor, a power line insulator, a copper foil mylar tape wrapped outside the insulator and a metal shielding layer woven around the outside of the copper foil mylar tape, the twisting pitch ratio of the power line conductor is 15-20 times, the metal shielding layer is woven by copper wires, and the coverage rate of the copper wires is greater than 85%.

4. The night-visible ultra-low temperature resistant mobile flexible cable of claim 1, wherein: the ground wire core is composed of a ground wire core conductor and butyronitrile semiconductive rubber wrapped outside the ground wire core conductor, the pitch diameter ratio of a ground wire core conductor bundle is 25-30 times, and the twisting pitch diameter ratio is 15-20 times.

5. The night-visible ultra-low temperature resistant mobile flexible cable of claim 1, wherein: the inner sheath is made of high-strength low-temperature-resistant silicon rubber, the strength of the high-strength low-temperature-resistant silicon rubber is more than 10MPa, and the glass transition temperature is lower than 70 ℃ below zero.

6. The night-visible ultra-low temperature resistant mobile flexible cable of claim 1, wherein: the outer sheath is made of a cold-resistant transparent polyether thermoplastic polyurethane elastomer TPU, the strength of the cold-resistant transparent polyether thermoplastic polyurethane elastomer TPU is more than 25MPa, the elongation of the cold-resistant transparent polyether thermoplastic polyurethane elastomer TPU is more than 600%, the hardness of the cold-resistant transparent polyether thermoplastic polyurethane elastomer TPU is not more than 85 ℃, and the glass transition temperature of the cold-resistant transparent polyether thermoplastic polyurethane elastomer TPU is lower than 60 ℃ below zero.