CN212724797U

CN212724797U - Flame-retardant fire-resistant waterproof instrument cable resistant to extreme cold weather

Info

Publication number: CN212724797U
Application number: CN202021445762.XU
Authority: CN
Inventors: 房权生; 马彦辉; 李昆鹏; 杨培文; 顾海东; 朱峰德
Original assignee: Baosheng Science and Technology Innovation Co Ltd
Current assignee: Baosheng Science and Technology Innovation Co Ltd
Priority date: 2020-07-21
Filing date: 2020-07-21
Publication date: 2021-03-16
Anticipated expiration: 2030-07-21

Abstract

The invention relates to an extremely cold weather resistant flame-retardant fire-resistant waterproof instrument cable, which sequentially comprises the following structures from inside to outside: the cable comprises a cable core, a water blocking tape wrapping layer, a shielding layer, a cold-resistant inner sheath layer, an armor layer and a cold-resistant outer sheath layer; the cable core comprises four insulating wire cores and a water-blocking rope filling layer filled among the insulating wire cores; each insulated wire core consists of a conductor, a fire-resistant layer wrapped outside the conductor and an insulating layer wrapped outside the fire-resistant layer, and every two insulated wire cores are twisted in pairs to form a group; the material of the cold-resistant outer sheath layer is an extremely cold-resistant halogen-free low-smoke flame-retardant polyolefin material. The utility model discloses an instrument cable structure is last to have better compliance, bending resistance, and has excellent resistant extremely low temperature performance, flame retardant property, fire-resistant and waterproof performance.

Description

Flame-retardant fire-resistant waterproof instrument cable resistant to extreme cold weather

Technical Field

The utility model relates to the technical field of cables, concretely relates to fire-retardant fire-resistant waterproof instrument cable of resistant extreme cold weather.

Background

With the development of society, the progress of technology level and the acceleration of urbanization and industrialization, the cold regions also meet new development requirements, and the electric wires and cables are gradually applied to various industries in the cold regions. However, the temperature difference between the south and the north is large, and the temperature is often below zero in winter in regions with high latitudes such as northeast, inner Mongolia and Xinjiang of China, for example, the average temperature of the coldest month in black river is about-23.8 ℃, and the extreme lowest temperature can reach about-45 ℃; in northern Europe, Russia and extreme regions in China, the temperature is usually lower than-40 ℃ in winter, and is far lower than the temperature application range of common instrument equipment and cables, so that the medium of the instrument equipment is easily solidified and frozen, the equipment is ice-blocked, the equipment is cracked, the transmitter screen at the site temperature, the pressure, the liquid level and the like cannot be continuously used, and signals cannot be transmitted to the sensor. Under such low temperature environment, ordinary PVC polyvinyl chloride cable sheath is easy to lose efficacy, causes the cable to freeze, and data transmission interrupts, seriously influences the safe and steady operation of system. The low-temperature performance of the common cold-resistant cable can not meet the environmental requirement of application.

SUMMERY OF THE UTILITY MODEL

In order to solve various problems and accident problems of the existing instrument cable in extreme cold climate, the flame-retardant fire-resistant waterproof instrument cable resistant to extreme cold climate is provided. The utility model discloses an instrument cable structure is last to have better compliance, bending resistance, and has excellent resistant extremely low temperature performance, flame retardant property, fire-resistant and waterproof performance.

In order to achieve the purpose, the invention is realized by the following technical scheme:

the utility model provides a fire-retardant fire-resistant waterproof instrument cable of resistant extreme cold weather, includes by interior structure outside to in proper order: the cable comprises a cable core, a water blocking tape wrapping layer, a shielding layer, a cold-resistant inner sheath layer, an armor layer and a cold-resistant outer sheath layer;

the cable core comprises four insulating wire cores and a water-blocking rope filling layer filled among the insulating wire cores; each insulated wire core consists of a conductor, a fire-resistant layer wrapped outside the conductor and an insulating layer wrapped outside the fire-resistant layer, and every two insulated wire cores are twisted in pairs to form a group;

the cold-resistant outer sheath layer is made of a cold-resistant anti-cracking halogen-free low-smoke flame-retardant polyolefin material.

Further, the conductor is a fifth type copper conductor. The fifth type of conductor is formed by twisting a plurality of thin monofilaments, is a conductor with flexibility after twisting, and can ensure that the finished cable has better flexibility, bending resistance, torsion resistance and longer service life.

Further, the fire-resistant layer is a mica tape wrapping layer, and the outer surface of the fire-resistant layer is provided with an aluminum hydroxide or magnesium hydroxide coating. The mica tape fire-resistant layer releases crystal water from aluminum hydroxide and magnesium hydroxide on the surface of the mica tape fire-resistant layer at high temperature, so that the temperature is reduced to achieve the purposes of fire insulation and even fire prevention.

Further, the insulating layer is made of a cold-resistant cross-linked polyethylene material.

Furthermore, the shielding layer is made of an aluminum-plastic composite tape. The aluminum-plastic composite tape is adopted for shielding, so that a good electromagnetic shielding effect can be achieved, and certain water resistance is achieved, and the accuracy of cable data transmission is further guaranteed.

Further, the material of the cold-resistant inner sheath layer is a cold-resistant low-smoke halogen-free flame-retardant material. Provides excellent safety protection and ensures the damage shielding effect in the moving process.

Further, the armor layer is armored by steel wires. Can provide good tensile capacity, excellent structural performance and safety protection.

Further, still include the non-woven fabrics around the covering between armor with cold-resistant type oversheath layer.

The beneficial technical effects are as follows:

the instrument cable of the utility model has the advantages that after the two groups of insulated wire cores are twisted with each other, the water-blocking rope is used as a filling layer to form a cable core, and meanwhile, a layer of water-blocking tape is wound outside the cable core, and the water-blocking rope and the water-blocking tape cooperatively play a better water-blocking effect; a mica tape fire-resistant layer is wound between the conductor and the insulating layer in the insulating wire core in a wrapping mode so as to provide excellent fire-resistant performance; wrapping an aluminum-plastic composite tape outside the water blocking tape wrapping layer of the cable core as a shielding layer so as to provide excellent electromagnetic shielding effect and ensure the accuracy of data transmission; and finally, the coldness-resistant halogen-free low-smoke flame-retardant polyolefin material is extruded to be used as a coldness-resistant outer sheath layer, so that good operation of the finished cable in cold and high-temperature environments can be guaranteed, and good flame retardance is also achieved.

The utility model discloses a cable is applicable to and extremely cold and harsh occasion such as the following control monitoring return circuit of weather and protection circuit, for example: the computer system and the electronic control and regulation system are used for solving the problems that the cable is easy to crack and seep water and the like under extremely cold and severe climate (below minus 50 ℃); the utility model discloses there are better compliance, bending resistance in the cable structure, have outstanding resistant extremely low temperature performance, flame retardant property, fire-resistant and waterproof performance in the performance, anti environmental disturbance can the reinforce to data transmission's security and accuracy have been guaranteed.

Drawings

Fig. 1 is the utility model discloses an extreme cold climate resistant fire-retardant fire-resistant waterproof instrument cable section structure sketch map of embodiment 1.

The labels in the figure are: 1-cable core, 2-water blocking tape wrapping layer, 3-shielding layer, 4-cold-resistant inner sheath layer, 5-armor layer, 6-non-woven fabric wrapping layer and 7-cold-resistant outer sheath layer; 11-insulating wire core and 12-water-blocking rope filling layer; 111-conductor, 112-refractory layer, 113-insulating layer.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the directions or positional relationships indicated as the terms "inside", "outside", etc., are based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but not for indication or suggestion that the referred device or element must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "wrapped", "extruded", etc. should be interpreted broadly when appearing. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

The cross-sectional structure schematic diagram of the flame-retardant fire-resistant waterproof instrument cable resistant to the extreme cold climate of the embodiment is shown in fig. 1:

the structure from inside to outside includes in proper order: the cable comprises a cable core 1, a water-blocking tape wrapping layer 2, a shielding layer 3, a cold-resistant inner sheath layer 4, an armor layer 5, a non-woven fabric wrapping layer 6 and a cold-resistant outer sheath layer 7;

the cable core 1 comprises four insulating wire cores 11 and a water-blocking rope filling layer 12 filled among the insulating wire cores 11; each insulated wire core 11 consists of a conductor 111, a fire-resistant layer 112 wrapped outside the conductor 111 and an insulating layer 113 wrapped outside the fire-resistant layer 112, and every two insulated wire cores 11 are twisted in pairs to form a group.

The conductor 111 is a fifth type stranded fine-twisted fine-wire copper conductor. The fifth type of conductor is formed by twisting a plurality of thin monofilaments, is a conductor with flexibility after twisting, and can ensure that the finished cable has better flexibility, bending resistance, torsion resistance and longer service life.

The fireproof layer 112 is a mica tape wrapping layer, and the outer surface of the fireproof layer 112 is provided with aluminum hydroxide or magnesium hydroxide. The mica tape wrapped fire-resistant layer 112 releases crystal water from aluminum hydroxide and magnesium hydroxide on the surface thereof at high temperature, so as to reduce the temperature to achieve the purpose of fire insulation and even fire prevention.

The insulating layer 113 is made of a cold-resistant cross-linked polyethylene material.

The shielding layer 2 is made of an aluminum-plastic composite tape. The aluminum-plastic composite tape is adopted for shielding, so that a good electromagnetic shielding effect can be achieved, and certain water resistance is achieved, and the accuracy of cable data transmission is further guaranteed.

Wherein, the material of the cold-resistant inner sheath layer 4 is a cold-resistant low-smoke halogen-free flame-retardant material. Provides excellent safety protection and ensures the damage shielding effect in the moving process. The specific formula can be referred to Chinese patent 201810901521.2.

Wherein, the armor layer 5 adopts steel wire armor. Can provide good tensile capacity, excellent structural performance and safety protection.

Wherein, the material of the cold-resistant outer sheath layer 7 is a cold-resistant anti-cracking halogen-free low-smoke flame-retardant polyolefin material, and the specific formula can refer to Chinese patent 201410207308.3;

or may be extruded according to the following specific formulation: 5 parts of polyethylene elastomer, 12 parts of unvulcanized EPDM (ethylene-propylene-diene monomer), 3 parts of DOPO flame retardant, 6 parts of maleic anhydride grafted polyethylene elastomer, 50 parts of mineral filler, 2 parts of cross-linking agent, 3 parts of antioxidant and 3.5 parts of triphenyl phosphate flame retardant synergist.

The tensile elongation at break of the cold-resistant outer sheath material at-52 ℃ is more than or equal to 30 percent (more than or equal to 20 percent in requirement), and the cold-resistant outer sheath material does not crack in an impact test result.

The instrument cable product of the embodiment is subjected to a fire resistance test, and the measured light transmittance of the smoke density is more than or equal to 70% (60% is required); the burning carbonization height is less than 0.65m (required to be less than or equal to 2.5 m); in the single vertical combustion test, the distance between the lower edge of the upper bracket and the charcoal-fired seven-point part is more than or equal to 350mm (required to be more than or equal to 50mm), and the distance between the downward extension of the combustion and the lower edge of the upper bracket is less than or equal to 487mm (required to be less than or equal to 540 mm).

The instrument cable product to this embodiment is through the bending property test more than thirty thousand times, and the test result shows, after the bending more than thirty thousand times, this embodiment instrument cable does not open circuit, and this shows that sinle silk wherein does not break, proves the utility model discloses an instrument cable has better compliance and bending property.

Claims

1. The utility model provides a fire-retardant fire-resistant waterproof instrument cable of resistant extreme cold weather which characterized in that, by interior structure outside to include in proper order: the cable comprises a cable core (1), a water-blocking tape wrapping layer (2), a shielding layer (3), a cold-resistant inner sheath layer (4), an armor layer (5) and a cold-resistant outer sheath layer (7);

the cable core (1) comprises four insulating wire cores (11) and a water-blocking rope filling layer (12) filled among the insulating wire cores (11); each insulated wire core (11) consists of a conductor (111), a fire-resistant layer (112) wrapped outside the conductor (111) and an insulating layer (113) wrapped outside the fire-resistant layer (112), and every two insulated wire cores (11) are twisted in pairs to form a group;

the cold-resistant outer sheath layer (7) is made of a cold-resistant anti-cracking halogen-free low-smoke flame-retardant polyolefin material.

2. The flame retardant, fire resistant and water resistant instrument cable resistant to extreme cold climates of claim 1 wherein the conductor (111) is a fifth type copper conductor.

3. The flame-retardant, fire-resistant and waterproof instrument cable resistant to the extreme cold climate according to claim 1, wherein the fire-resistant layer (112) is a mica tape wrapping layer, and the outer surface of the fire-resistant layer (112) is provided with a coating of aluminum hydroxide or magnesium hydroxide.

4. The flame-retardant, fire-resistant and waterproof instrument cable resistant to the extreme cold climate according to claim 1, wherein the material of the insulating layer (113) is a cold-resistant cross-linked polyethylene material.

5. The flame-retardant fire-resistant waterproof instrument cable resistant to the extreme cold climate according to claim 1, wherein the shielding layer (3) is made of an aluminum-plastic composite tape.

6. The flame-retardant fire-resistant waterproof instrument cable resistant to the extreme cold climate according to claim 1, wherein the material of the cold-resistant inner sheath layer (4) is a cold-resistant low-smoke halogen-free flame-retardant material.

7. The flame-retardant fire-resistant waterproof instrument cable resistant to the extreme cold climate according to claim 1, wherein the armor layer (5) is armored with steel wires.

8. The flame-retardant fire-resistant waterproof instrument cable resistant to the extreme cold climate according to claim 1, further comprising a non-woven fabric wrapping layer (6) between the armor layer (5) and the cold-resistant outer sheath layer (7).