A fireproof and fire-resistant signal transmission line

Abstract

The utility model relates to the field of transmission lines, specifically a fireproof and fire-resistant signal transmission line, including a cable formed by twisting a power line group, a communication line group and a ground line, and the cable is sequentially provided with a cable wrap, a metal shielding layer, an isolation wrapping layer and an outer sheath layer; the power line is sequentially provided with a power line conductor, a power line fire-resistant layer and a power line insulation layer from the inside to the outside, the communication line is sequentially provided with a communication line conductor, a communication line fire-resistant layer and a communication line insulation layer from the inside to the outside, and the ground line is sequentially provided with a ground line conductor, a ground line fire-resistant layer and a ground line insulation layer from the inside to the outside. The utility model is suitable for current and signal transmission of auxiliary electrical equipment of coke ovens in the coal coke industry, and the cable is suitable for high-temperature dry distillation, smelting coking, and high-temperature resistance, fire prevention, fire resistance, and anti-electromagnetic interference environments.

Description

Technical Field

[0001] The utility model relates to the field of transmission lines, in particular to a fireproof and fire-resistant signal transmission line. Background Art

[0002] China is a major producer, consumer and exporter of coking products. Coking products are widely used in the chemical industry, pharmaceutical industry, refractory industry and national defense industry. In recent years, the coking industry has developed rapidly. Coking is a secondary process of thermally destroying and processing residual oil under high temperature conditions to obtain petroleum coke, gasoline, diesel, wax oil and gas. The coking process is a comprehensive process of thermal decomposition and condensation. The coking unit is a high-temperature (the maximum temperature of the unit can reach more than 1000℃, and the medium temperature is up to 500℃), high-pressure (maximum pressure 3.8MPa), flammable and explosive unit. The raw material used is vacuum residual oil with atmospheric and vacuum pressure, and its autoignition point is 230-240℃, while the operating temperature of the unit is mostly above 300℃. Once leaked, it is very easy to cause a fire. The boiling point and flash point of the produced dry gas and gasoline are very low, and they can form explosive mixed gases when mixed with air. At the same time, since the autoignition points of its products diesel and wax oil are lower than the operating temperature of the unit, it is very easy to cause a fire, which is very dangerous. In order to ensure the safe operation of the coking unit and the stable transmission of the control system, the performance requirements of the adopted cables are high, such as high temperature resistance, high mechanical strength, fire resistance, fire resistance, anti-electromagnetic interference, environmental protection, etc. This puts higher requirements on the structural design of the cable and the selection of materials. Utility Model Content

[0003] The embodiment of the utility model provides a fireproof and fire-resistant signal transmission line, aiming to solve the problem that the existing fixing device is not convenient for supporting the drainage tube to improve stability and change height, and is not convenient for folding.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A fireproof and fire-resistant signal transmission line, characterized in that: it comprises a cable formed by twisting a power line group, a communication line group and a ground line, and the cable is provided with a cable wrap 11, a metal shielding layer 12, an isolation wrap layer 13 and an outer sheath layer 14 in sequence;

[0006] The power line comprises, from the inside to the outside, a power line conductor 1, a power line fire-resistant layer 2 and a power line insulation layer 3; the communication line comprises, from the inside to the outside, a communication line conductor 4, a communication line fire-resistant layer 5 and a communication line insulation layer 6; the ground wire comprises, from the inside to the outside, a ground wire conductor 7, a ground wire fire-resistant layer 8 and a ground wire insulation layer 9.

[0007] The power line conductor 1, the communication line conductor 4 and the ground line conductor 7 are all made of the fifth type of tinned twisted round copper conductor that meets the requirements of GB / T 3956-2008. The twisted conductor should not have the phenomenon of missing wires, loose strands and broken strands, and the conductors should be twisted evenly and tightly, and the surface should be smooth without defects such as oil stains, burrs, sharp edges, scratches and protrusions.

[0008] The fire-resistant layer 2 of the power line, the fire-resistant layer 5 of the communication line and the fire-resistant layer 8 of the ground line are all wrapped with overlapping fiber cloth film phlogopite tapes. The number of layers of mica tape is two, and the inner layer is left-handed and the outer layer is right-handed. The adjacent layers are wrapped in the opposite overlapping manner. The overlapping of each layer should be uniform, and the overlapping width is 20% to 30% of the bandwidth. The overlapping parts should be staggered to avoid periodic overlap of the overlapping parts and cause the insulation quality to decrease. The wrapping tension of each layer should be adjusted to make the mica tape wrap flat and tight, without wrinkles, burrs and other defects. After wrapping, the insulated wire core should be round and tight, with a uniform outer diameter, and should not have wrinkles, nor mechanical damage such as abrasions and wear.

[0009] The power line insulation layer 3, the communication line insulation layer 6, and the ground line insulation layer 9 are extruded from polytetrafluoroethylene insulation material resistant to high temperature of 200°C, and the mold adopts tube extrusion. The average thickness of the insulation layer is not less than the nominal value, the thinnest point is not less than the nominal value × 90% -0.1mm, and the eccentricity is ≤10%. The insulation extrusion line speed is 100-120m / min, and the extrusion temperature is 290-320°C. There are no visible defects such as bubbles and sand holes on the cross section of the insulating core. The surface of the core should be smooth, without obvious twisted wire convexity, and should not have sharp corners, particles, burns or scratches. The surface of the core should be smooth, without obvious twisted wire convexity, and should not have sharp corners, particles, burns or scratches. The insulating core is marked with color separation. The power cord is distinguished by extrusion of red and blue insulating materials, and the communication line is distinguished by extrusion of blue and white insulating materials.

[0010] The red and blue power wires are twisted in the right direction with a twist pitch of no more than 100mm. The wires are wrapped with high-temperature resistant film on the outside. The blue and white communication wires are twisted in the right direction with a twist pitch of no more than 80mm. The wires are wrapped with high-temperature resistant film on the outside. The inductance / resistance ratio of adjacent cores should be ≤25μH / Ω. Different pitches can effectively avoid mutual electromagnetic interference between wire groups.

[0011] Halogen-free, non-toxic, smoke-free ceramic fireproof and fire-resistant filling ropes 10 are used to fill the gaps between the power line group, communication line group and ground line group and the core gaps, and the fire-resistant filling ropes are twisted together with the cores in the right direction to form a cable.

[0012] The metal shielding layer 12 is woven by a 16-spindle high-speed braiding machine. The tinned copper wires are cross-woven in left and right directions to form a braided layer. The coverage area of ​​the braided layer is not less than 86%. The fine shielding structure effectively prevents external electromagnetic interference and can improve the accuracy of monitoring data. The tin plating on the surface of the copper wire effectively prevents the copper conductor from moisture and oxidation, which can increase the service life of the cable.

[0013] The isolation wrapping layer 13 is wrapped with ceramic fire-proof and fire-resistant composite tape in an overlapping manner. The overlapping width of the composite tape is 10% to 15% of the tape width. The silicone layer of the composite tape is inside and the high-temperature glass fiber layer is outside, thereby better giving the cable core heat-resistant performance and preventing the shielding copper wire from piercing the outer sheath.

[0014] The outer sheath layer 14 is extruded from a red ceramic fireproof and fire-resistant silicone rubber sheath material, the average thickness of the sheath is not less than the nominal value, the thinnest point is not less than the nominal value × 85% - 0.1mm, the tensile strength of the outer sheath layer is not less than 6.0Mpa, and the elongation at break is not less than 200%; the outer sheath layer has excellent mechanical and electrical properties, does not absorb water or moisture, has good flexibility and elasticity under normal conditions, has good high and low temperature resistance, a normal use temperature of -60°C to +200°C, is low smoke and halogen-free, does not contain phosphorus and nitrogen, does not contain heavy metals, and has a smoke toxicity safety level as high as the highest safety level ZA1 for polymer materials. At high temperatures or flames of 500°C to 3000°C, it can be quickly burned into a complete and hard ceramic shell, which does not melt, shrink or drip at high temperatures, and has excellent fire and heat insulation effects.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The invention is suitable for current and signal transmission of auxiliary electrical equipment of coke ovens in the coal coke industry, and the cable is suitable for high-temperature dry distillation, smelting coking, and high-temperature resistance, fire resistance, fire resistance, and anti-electromagnetic interference environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model.

[0018] In the figure: power line conductor 1, power line fire-resistant layer 2, power line insulation layer 3, communication line conductor 4, communication line fire-resistant layer 5, communication line insulation layer 6, ground wire conductor 7, ground wire fire-resistant layer 8, ground wire insulation layer 9, ceramic fire-resistant fire-resistant filling rope 10, cable wrapping 11, metal shielding layer 12, isolation wrapping layer 13, outer sheath layer 14. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0021] Embodiment 1

[0022] A fireproof and fire-resistant signal transmission line, such as Figure 1 As shown, it includes a cable formed by twisting a power line group, a communication line group and a ground line, and the outside of the cable is a cable wrap 11, a metal shielding layer 12, an isolation wrap layer 13 and an outer sheath layer 14 in sequence;

[0023] The power line comprises, from the inside to the outside, a power line conductor 1, a power line fire-resistant layer 2 and a power line insulation layer 3; the communication line comprises, from the inside to the outside, a communication line conductor 4, a communication line fire-resistant layer 5 and a communication line insulation layer 6; the ground wire comprises, from the inside to the outside, a ground wire conductor 7, a ground wire fire-resistant layer 8 and a ground wire insulation layer 9.

[0024] The power line conductor 1, the communication line conductor 4 and the ground line conductor 7 are all made of the fifth type of tinned twisted round copper conductor that meets the requirements of GB / T 3956-2008. The twisted conductor should not have the phenomenon of missing wires, loose strands and broken strands, and the conductors should be twisted evenly and tightly, and the surface should be smooth without defects such as oil stains, burrs, sharp edges, scratches and protrusions.

[0025] The fire-resistant layer 2 of the power line, the fire-resistant layer 5 of the communication line and the fire-resistant layer 8 of the ground line are all wrapped with overlapping fiber cloth film phlogopite tapes. The number of layers of mica tape is two, and the inner layer is left-handed and the outer layer is right-handed. The adjacent layers are wrapped in the opposite overlapping manner. The overlapping of each layer should be uniform, and the overlapping width is 20% to 30% of the bandwidth. The overlapping parts should be staggered to avoid periodic overlap of the overlapping parts and cause the insulation quality to decrease. The wrapping tension of each layer should be adjusted to make the mica tape wrap flat and tight, without wrinkles, burrs and other defects. After wrapping, the insulated wire core should be round and tight, with a uniform outer diameter, and should not have wrinkles, nor mechanical damage such as abrasions and wear.

[0026] The power line insulation layer 3, the communication line insulation layer 6, and the ground line insulation layer 9 are extruded from polytetrafluoroethylene insulation material resistant to high temperature of 200°C, and the mold adopts tube extrusion. The average thickness of the insulation layer is not less than the nominal value, the thinnest point is not less than the nominal value × 90% -0.1mm, and the eccentricity is ≤10%. The insulation extrusion line speed is 100-120m / min, and the extrusion temperature is 290-320°C. There are no visible defects such as bubbles and sand holes on the cross section of the insulating core. The surface of the core should be smooth, without obvious twisted wire convexity, and should not have sharp corners, particles, burns or scratches. The surface of the core should be smooth, without obvious twisted wire convexity, and should not have sharp corners, particles, burns or scratches. The insulating core is marked with color separation. The power cord is distinguished by extrusion of red and blue insulating materials, and the communication line is distinguished by extrusion of blue and white insulating materials.

[0027] The red and blue power wires are twisted in the right direction with a twist pitch of no more than 100mm. The wires are wrapped with high-temperature resistant film on the outside. The blue and white communication wires are twisted in the right direction with a twist pitch of no more than 80mm. The wires are wrapped with high-temperature resistant film on the outside. The inductance / resistance ratio of adjacent cores should be ≤25μH / Ω. Different pitches can effectively avoid mutual electromagnetic interference between wire groups.

[0028] Halogen-free, non-toxic, smoke-free ceramic fireproof and fire-resistant filling ropes 10 are used to fill the gaps between the power line group, communication line group and ground line group and the core gaps, and the fire-resistant filling ropes are twisted together with the cores in the right direction to form a cable.

[0029] The metal shielding layer 12 is woven by a 16-spindle high-speed braiding machine. The tinned copper wires are cross-woven in left and right directions to form a braided layer. The coverage area of ​​the braided layer is not less than 86%. The fine shielding structure effectively prevents external electromagnetic interference and can improve the accuracy of monitoring data. The tin plating on the surface of the copper wire effectively prevents the copper conductor from moisture and oxidation, which can increase the service life of the cable.

[0030] The isolation wrapping layer 13 is wrapped with ceramic fire-proof and fire-resistant composite tape in an overlapping manner. The overlapping width of the composite tape is 10% to 15% of the tape width. The silicone layer of the composite tape is inside and the high-temperature glass fiber layer is outside, thereby better giving the cable core heat-resistant performance and preventing the shielding copper wire from piercing the outer sheath.

[0031] The outer sheath layer 14 is extruded from a red ceramic fireproof and fire-resistant silicone rubber sheath material, the average thickness of the sheath is not less than the nominal value, the thinnest point is not less than the nominal value × 85% - 0.1mm, the tensile strength of the outer sheath layer is not less than 6.0Mpa, and the elongation at break is not less than 200%; the outer sheath layer has excellent mechanical and electrical properties, does not absorb water or moisture, has good flexibility and elasticity under normal conditions, has good high and low temperature resistance, a normal use temperature of -60°C to +200°C, is low smoke and halogen-free, does not contain phosphorus and nitrogen, does not contain heavy metals, and has a smoke toxicity safety level as high as the highest safety level ZA1 for polymer materials. At high temperatures or flames of 500°C to 3000°C, it can be quickly burned into a complete and hard ceramic shell, which does not melt, shrink or drip at high temperatures, and has excellent fire and heat insulation effects.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fireproof and fire-resistant signal transmission line, characterized in that: The invention comprises a cable formed by twisting a power line group, a communication line group and a ground line, and the cable is provided with a cable wrap (11), a metal shielding layer (12), an isolation wrapping layer (13) and an outer sheath layer (14) in sequence; The power line comprises, from the inside to the outside, a power line conductor (1), a power line fire-resistant layer (2), and a power line insulation layer (3); the communication line comprises, from the inside to the outside, a communication line conductor (4), a communication line fire-resistant layer (5), and a communication line insulation layer (6); and the ground line comprises, from the inside to the outside, a ground line conductor (7), a ground line fire-resistant layer (8), and a ground line insulation layer (9).

2. A fireproof and fire-resistant signal transmission line according to claim 1, characterized in that: The power line conductor (1), the communication line conductor (4) and the ground line conductor (7) are all made of the fifth type of tinned twisted circular copper conductor that meets the requirements of GB / T 3956-2008.

3. A fireproof and fire-resistant signal transmission line according to claim 2, characterized in that: The power line fire resistant layer (2), the communication line fire resistant layer (5) and the ground line fire resistant layer (8) are all wrapped with fiber cloth film phlogopite tape in an overlapping manner. The mica tape has two layers, and the inner layer is wrapped in the left direction, the outer layer is wrapped in the right direction, and the adjacent layers are wrapped in the opposite overlapping manner. The overlapping of each layer should be uniform, and the overlapping width should be 20% to 30% of the bandwidth. The overlapping parts should be staggered to avoid periodic overlap of the overlapping parts, which may cause a decrease in insulation quality.

4. A fireproof and fire-resistant signal transmission line according to claim 3, characterized in that: The power line insulation layer (3), the communication line insulation layer (6), and the ground line insulation layer (9) are extruded from polytetrafluoroethylene insulation material resistant to high temperatures of 200°C, the die is a tube extrusion type, the insulation wire cores are marked with colors, the power line is distinguished by extrusion of red and blue insulation materials, and the communication line is distinguished by extrusion of blue and white insulation materials.

5. A fireproof and fire-resistant signal transmission line according to claim 4, characterized in that: The red and blue power wires are twisted in the right direction with a twist pitch of no more than 100mm. The wires are wrapped with high-temperature resistant film on the outside. The blue and white communication wires are twisted in the right direction with a twist pitch of no more than 80mm. The wires are wrapped with high-temperature resistant film on the outside. The inductance / resistance ratio of adjacent cores should be ≤25μH / Ω. Different pitches can effectively avoid mutual electromagnetic interference between wire groups.

6. The fireproof and fire-resistant signal transmission line according to claim 5, characterized in that: Halogen-free, non-toxic, smoke-free ceramic fireproof and fire-resistant filling ropes (10) are used to fill the gaps between the power line group, the communication line group and the ground line line groups and the core gaps, and the fire-resistant filling ropes are twisted together with the cores in the right direction to form a cable.

7. The fireproof and fire-resistant signal transmission line according to claim 6, characterized in that: The metal shielding layer (12) is woven by a 16-spindle high-speed braiding machine. The tinned copper wires are cross-woven in left and right directions to form a braided layer. The coverage area of ​​the braided layer is not less than 86%. The fine shielding structure effectively prevents external electromagnetic interference and can improve the accuracy of monitoring data. The tin coating on the surface of the copper wire effectively prevents the copper conductor from being damp and oxidized, thereby increasing the service life of the cable.

8. The fireproof and fire-resistant signal transmission line according to claim 7, characterized in that: The isolation wrapping layer (13) is wrapped with ceramic fireproof and fire-resistant composite tape in an overlapping manner, the overlapping width of the composite tape is 10% to 15% of the tape width, the silicone layer of the composite tape is inside, and the high-temperature glass fiber layer is outside, so as to better give the cable core heat resistance and prevent the shielding copper wire from piercing the outer sheath.

9. The fireproof and fire-resistant signal transmission line according to claim 8, characterized in that: The outer sheath layer (14) is extruded from red ceramic fireproof and fire-resistant silicone rubber sheath material, the average thickness of the sheath is not less than the nominal value, the thinnest point is not less than the nominal value×85%-0.1mm, the tensile strength of the outer sheath layer is not less than 6.0Mpa, and the elongation at break is not less than 200%.

Images