CN111524645A - B1-grade flame-retardant cross-linked polyethylene insulated polyolefin sheath control cable and preparation method thereof - Google Patents

Abstract

The invention discloses a B1-grade flame-retardant cross-linked polyethylene insulated polyolefin sheath control cable and a preparation method thereof, belonging to the technical field of electric wires and cables, and comprising a polyethylene outer sheath, a polyolefin inner sheath, an armor tape, an armor strip, a main elastic plate, a contact strip, an auxiliary elastic plate and a water-insulating frame, wherein the B1-grade flame-retardant cross-linked polyethylene insulated polyolefin sheath control cable and the preparation method thereof, the bottom of the armor strip is provided with inclined teeth, the reserved space between the armor strip combinations is increased while the armor strip is provided with winding protection, the buffering performance is good, the mechanical damage probability of the control cable is effectively reduced, the pressure resistance is improved, the contact strip is bonded at the bottom of the armor strip, the contact strip utilizes the inclined plates to reduce the gaps in the winding combination, and the insulation frame combined on the auxiliary elastic plate is matched, the water-absorbing glue stick carrying a desiccant compression sleeve in the insulation frame can be filled with the gaps of the winding combination, the barrier effect is good, and the damage probability caused by wetting is improved.

Description

B1-grade flame-retardant cross-linked polyethylene insulated polyolefin sheath control cable and preparation method thereof

Technical Field

The invention relates to the technical field of wires and cables, in particular to a B1-grade flame-retardant crosslinked polyethylene insulating polyolefin sheath control cable and a preparation method thereof.

Background

The cable is generally composed of several or several groups of wires, and the basic structure of the cable is generally composed of several parts, such as a cable core, a reinforcing steel wire, a filler, a sheath and the like.

The control cable is a classification of cables, and is a polyvinyl chloride insulation and polyvinyl chloride sheath control cable suitable for industrial and mining enterprises, energy traffic departments, occasions for controlling and protecting lines with the alternating current rated voltage of below 450/750 volts and the like.

The performance of the control cable is stable under the influence of the range of using places, and the control cable is an important consideration range in daily combination and use and has great influence on various aspects such as stable use, economic saving, safety and the like.

Along with the development of the cable industry, the application range of the power cable is increasingly wide, but in the use process of the control cable, the cable is easily damaged mechanically under the influence of the use environment, the pressure resistance of the mechanical cable is poor under the influence of external force, the armor reinforcement is mainly used in the cable, surplus space is lacked between combinations, and meanwhile in the moist environment, the control cable has a single water source blocking mode and is also easily affected by moisture to actually use the guide core.

Disclosure of Invention

The invention aims to provide a B1-grade flame-retardant cross-linked polyethylene insulated polyolefin sheath control cable and a preparation method thereof, and aims to solve the problems that the application range of a power cable is increasingly wide along with the development of the cable industry, but the cable is easily subjected to mechanical damage under the influence of the use environment in the use process of the control cable, the mechanical cable is poor in pressure resistance under the influence of external force, the armor reinforcement is mainly arranged in the cable, surplus space is lacked between combinations, and the control cable is single in water source blocking mode and is easily affected by moisture in the humid environment to actually use a conductive core.

In order to achieve the purpose, the invention provides the following technical scheme: a control cable with a B1-grade flame-retardant cross-linked polyethylene insulated polyolefin sheath comprises a polyethylene outer sleeve, a polyolefin inner sleeve, an armor belt, an armor strip, a main elastic plate, a contact strip, an auxiliary elastic plate and a water insulation frame, wherein the armor belt is sleeved inside the polyethylene outer sleeve, the polyolefin inner sleeve is wound inside the circumference of the armor belt, the armor strip is bonded inside the armor belt, the armor strip is in a circular arc shape, the main elastic plate is bonded at the bottom of an inner cavity of the armor strip, the contact strip is bonded at the bottom of the armor strip, the auxiliary elastic plate is bonded at the bottom of the contact strip, the water insulation frame is bonded at the bottom of the auxiliary elastic plate, the inner sleeve is sleeved on the circumferential inner wall of the polyolefin inner sleeve, the waterproof belt is wound on the circumferential outer wall of the inner sleeve, the main core sleeve is sleeved on the circumferential inner wall of the inner sleeve, and the auxiliary core sleeve is sleeved on the circumferential inner wall of the main core sleeve, the bottom integrated into one piece of armour strip is connected with the skewed tooth, lateral wall integrated into one piece is connected with the swash plate about the contact strip, lateral wall integrated into one piece is connected with the arc groove about the frame that does not insulate against water, the inside in arc groove has cup jointed the glue stick that absorbs water, the circumference outer wall of glue stick that absorbs water has cup jointed drier compression cover.

Preferably, the armor tape is made of a metal woven tape.

Preferably, the main guide core is inserted into the circumferential inner wall of the main core sleeve, and the auxiliary guide core is inserted into the circumferential inner wall of the auxiliary core sleeve.

Preferably, the material of skewed tooth is soft rubber sheet, and the skewed tooth evenly connects in the outside of armor strip with diverging structure.

A preparation method of a B1-level flame-retardant crosslinked polyethylene insulated polyolefin sheath control cable comprises the following steps:

s1: selecting polyethylene: 20-60 parts; silica gel flame retardant powder: 5-12 parts of a solvent; lead-free PVC: 10-20 parts; releasing agent: 0.5-0.6 part; filling materials: 20-30 parts of the polyethylene jacket, adopting a mechanical mixing mode, enabling the rotating speed of a motor of a mixer to be 2000r/min, enabling the temperature during mixing to be 70-120 ℃, after mixing for 20-45 min, cooling for 30-50 min, inspecting the mixture, removing impurities or positions with uneven color values, carrying out secondary stirring, and extruding by using an extruder device to obtain the polyethylene jacket;

s2: proportioning polyolefin insulating material, antioxidant, flame retardant, plasticizer, lubricant and colorant, weighing the materials in a proportion of 80: 5: 5: 8: 1: 1, adopting a mechanical mixing mode, mixing for 30-50 min at the temperature of 60-75 ℃, ensuring invasion of impurities, preventing material dirtying, ensuring no color value difference and no agglomeration of the ingredients, and extruding by matching an extruding device after pressing to obtain the polyolefin inner sleeve;

s3: taking the polyethylene outer sleeve, and sleeving and combining a polyolefin inner sleeve in the polyethylene outer sleeve, wherein the inner sleeve is inserted into the circumferential inner wall of the polyolefin inner sleeve;

s4: taking the armor belt, winding the armor belt on the circumferential outer wall of the polyolefin inner sleeve in a coiling machine, wherein the armor strip on the inner side of the armor belt is in contact with the circumferential outer wall of the polyolefin inner sleeve, and the distance from the twisting head to the twisting point is 13-20 mm;

s5: in the armor tape combination, the winding angles are required to be ensured to be consistent, so that the contact strip at the bottom of the armor strip can be tightly attached to the previous winding position, and the inclined plates are mutually attached in the winding process;

s6: the bottom of the auxiliary elastic plate is bonded with the water insulation frame, the water absorbing glue stick is inserted into the arc groove of the water insulation frame, and after the water absorbing glue stick is matched with the contact strip for winding and combination, the combination position of the water absorbing glue stick can fill the contact gap of the contact strip;

s7: the main core sleeve carrying the main guide core and the auxiliary core sleeve carrying the auxiliary guide core are sequentially combined in the inner sleeve, the tight combination process needs to be ensured, and water-absorbing powder can be selectively filled in gaps;

s8: the components are integrally pressed after being sleeved, a 2500Mpa isostatic press is adopted, the pressing time is 25-45 min, the pressure is 3-7 GPa, then the components are pressed for 30-45 min again, the pressure is 6-10 GPa, and the phenomena of disorder lines, line pressing, line loosening and the like are avoided;

s9: after the cable is rolled and formed, the cable is externally packaged, and surface identification is carried out and checked: factory name, overprint content, model, specification, year, cable number and rice standard; the printed characters are clear and firm, and have no error printing and missing printing.

Compared with the prior art, the invention has the beneficial effects that: this kind of B1 level fire-retardant crosslinked polyethylene insulation polyolefin sheath control cable and preparation method thereof, armor strip is connected at the bottom of armor area, the bottom of armor strip has the skewed tooth, can be when joining in marriage the armor strip and twine the protection, increase the reserve of armor area between the combination and be full of the deposit space, but the buffer nature is good, effectively reduce control cable's mechanical damage probability, the resistance to compression promotes, and bond contact strip in the bottom of armor strip, the contact strip utilizes the swash plate to reduce the clearance in the winding combination, cooperate the insulating frame of combination on the vice elastic plate, can make the insulating frame in carry the water absorption glue stick of drier compression cover and fill with the clearance of winding combination, the separation is effectual, improve the damage probability because of the damp leads to.

Drawings

FIG. 1 is a schematic side exploded view of the present invention;

FIG. 2 is a schematic illustration of armor tape wrapping according to the present disclosure;

FIG. 3 is a schematic view of an armor strip construction of the present invention;

FIG. 4 is a schematic view of a contact strip structure according to the present invention;

fig. 5 is a schematic view of the water insulation frame structure of the present invention.

In the figure: 100 polyethylene outer sleeve, 110 polyolefin inner sleeve, 120 inner sleeve, 130 waterproof belt, 140 main core sleeve, 141 main guide core, 150 auxiliary core sleeve, 151 auxiliary guide core, 200 armor belt, 300 armor strip, 310 helical teeth, 320 main elastic plate, 400 contact strip, 410 inclined plate, 500 auxiliary elastic plate, 510 water insulation frame, 511 arc groove, 512 water absorbing glue stick and 513 desiccant compression sleeve.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides a preparation method of a B1-grade flame-retardant cross-linked polyethylene insulating polyolefin sheath control cable, which can reduce the mechanical damage of the control cable, improve the pressure resistance and facilitate the increase of the insulating and damp-proof effect, and please refer to fig. 1-5, which comprises a polyethylene outer sleeve 100, a polyolefin inner sleeve 110, an armor tape 200, an armor strip 300, a main elastic plate 320, a contact strip 400, an auxiliary elastic plate 500 and a water-insulating frame 510;

referring to fig. 1 again, the polyethylene outer jacket 100 has a polyolefin inner jacket 110 on the circumferential inner wall, specifically, the polyolefin inner jacket 110 is sleeved with an inner jacket 120 on the circumferential inner wall, a waterproof belt 130 is wound on the circumferential outer wall of the inner jacket 120, a main core jacket 140 is sleeved on the circumferential inner wall of the inner jacket 120, an auxiliary core jacket 150 is sleeved on the circumferential inner wall of the main core jacket 140, a main guide core 141 is inserted into the circumferential inner wall of the main core jacket 140, and an auxiliary guide core 151 is inserted into the circumferential inner wall of the auxiliary core jacket 150;

referring to fig. 1 again, the inner circumferential wall of the armor tape 200 contacts the inner circumferential wall of the inner polyolefin sleeve 110, specifically, the armor tape 200 is sleeved inside the outer polyethylene sleeve 100, the inner polyolefin sleeve 110 is wound inside the circumference of the armor tape 200, and the armor tape 200 is made of a metal woven tape;

referring to fig. 1 again, the bottom of the armor strip 300 is fixedly connected to the inner side of the armor strip 200, specifically, the armor strip 300 is bonded to the inner side of the armor strip 200, the armor strip 300 is in the shape of a circular arc, a main elastic plate 320 is bonded to the bottom of an inner cavity of the armor strip 300, the bottom of the armor strip 300 is integrally connected to a helical tooth 310, the helical tooth 310 is made of a soft rubber plate, and the helical tooth 310 is uniformly connected to the outer side of the armor strip 300 in a divergent structure.

Referring to fig. 1 again, the top of the contact strip 400 is connected to the bottom of the armor strip 300, specifically, the bottom of the armor strip 300 is adhered to the contact strip 400, and the left and right sidewalls of the contact strip 400 are integrally connected to the inclined plates 410.

Referring to fig. 2-4 again, the top of the secondary elastic plate 500 is connected to the bottom of the contact strip 400, specifically, the bottom of the contact strip 400 is bonded to the secondary elastic plate 500, the bottom of the secondary elastic plate 500 is bonded to the water insulation frame 510, the left and right side walls of the water insulation frame 510 are integrally connected to the arc groove 511, the water absorbing glue stick 512 is sleeved inside the arc groove 511, and the peripheral outer wall of the water absorbing glue stick 512 is sleeved with the desiccant compression sleeve 513.

The invention also provides a preparation method of the B1-grade flame-retardant crosslinked polyethylene insulated polyolefin sheath control cable, which comprises the following steps:

referring to fig. 1-4, the preparation method of the B1-grade flame-retardant crosslinked polyethylene insulated polyolefin sheathed control cable comprises the following steps:

s1: selecting polyethylene: 20-60 parts; silica gel flame retardant powder: 5-12 parts of a solvent; lead-free PVC: 10-20 parts; releasing agent: 0.5-0.6 part; filling materials: 20-30 parts of the polyethylene outer sleeve 100, wherein a mechanical mixing mode is adopted, the rotating speed of a motor of a mixer is 2000r/min, the temperature during mixing is 70-120 ℃, the mixture is cooled for 30-50 min after being mixed for 20-45 min, the mixture is inspected, the positions with impurities or uneven color values are picked and secondarily stirred, and the mixture is extruded by an extruder device;

s2: proportioning polyolefin insulating material, antioxidant, flame retardant, plasticizer, lubricant and colorant, weighing the materials in a proportion of 80: 5: 5: 8: 1: 1, adopting a mechanical mixing mode, mixing for 30-50 min at the temperature of 60-75 ℃, ensuring invasion of impurities, preventing material dirtying, ensuring no color value difference and no agglomeration of the ingredients, and extruding by matching an extruding device after pressing to obtain a polyolefin inner sleeve 110;

s3: taking a polyethylene outer sleeve 100, sleeving and combining a polyolefin inner sleeve 110 in the polyethylene outer sleeve 100, and inserting an inner sleeve 120 in the circumferential inner wall of the polyolefin inner sleeve 110;

s4: taking the armor tape 200, winding the armor tape on the circumferential outer wall of the polyolefin inner sleeve 110 by matching with a winding machine, wherein an armor strip 300 on the inner side of the armor tape 200 is in contact with the circumferential outer wall of the polyolefin inner sleeve 110, and the distance from a twisting head to a twisting point is 13-20 mm;

s5: in the armor tape 200 combination, the winding angles are required to be consistent, so that the contact strip 400 at the bottom of the armor strip 300 can be tightly attached to the previous winding position, and the inclined plates 410 in winding are mutually attached;

s6: the bottom of the secondary elastic plate 500 is bonded with a water insulation frame 510, a water absorbing glue stick 512 is inserted into an arc groove 511 of the water insulation frame 510, and after the water absorbing glue stick 512 is matched with the contact strip 400 to be wound and combined, the combined position of the water absorbing glue stick 512 can fill the contact gap of the contact strip 400;

s7: a main core sleeve 140 carrying a main guide core 141 and an auxiliary core sleeve 150 carrying an auxiliary guide core 151 are sequentially combined in the inner sleeve 120, the combination process needs to be ensured to be compact, and water-absorbing powder can be selectively filled in gaps;

s8: the components are integrally pressed after being sleeved, a 2500Mpa isostatic press is adopted, the pressing time is 25-45 min, the pressure is 3-7 GPa, then the components are pressed for 30-45 min again, the pressure is 6-10 GPa, and the phenomena of disorder lines, line pressing, line loosening and the like are avoided;

s9: after the cable is rolled and formed, the cable is externally packaged, and surface identification is carried out and checked: factory name, overprint content, model, specification, year, cable number and rice standard; the printed characters are clear and firm, and have no error printing and missing printing.

Examples

S1: selecting polyethylene: 60 parts; silica gel flame retardant powder: 12 parts of (1); lead-free PVC: 20 parts of (1); releasing agent: 0.6 part; filling materials: 7.4 parts of the polyethylene coating, wherein a mechanical mixing mode is adopted, the rotating speed of a motor of a mixer is 2000r/min, the temperature during mixing is 120 ℃, the mixture is cooled and placed for 50min after being mixed for 25min, the mixture is inspected, the positions with impurities or uneven color values are picked out and secondarily stirred, and the polyethylene coating 100 is obtained by being matched with an extruder device for extrusion;

s2: proportioning polyolefin insulating material, antioxidant, flame retardant, plasticizer, lubricant and colorant, weighing the materials in a proportion of 80: 5: 5: 8: 1: 1, adopting a mechanical mixing mode, wherein the mixing time is 35min, the mixing temperature is 70 ℃, sundries need to be ensured to invade, the material is prevented from being dirtied, the color value difference and agglomeration of the ingredients are ensured to be avoided, and extruding by matching an extruding device after pressing to obtain a polyolefin inner sleeve 110;

s3: taking a polyethylene outer sleeve 100, sleeving and combining a polyolefin inner sleeve 110 in the polyethylene outer sleeve 100, and inserting an inner sleeve 120 in the circumferential inner wall of the polyolefin inner sleeve 110;

s4: taking the armor tape 200, winding the armor tape on the circumferential outer wall of the polyolefin inner sleeve 110 by matching with a winding machine, wherein an armor strip 300 on the inner side of the armor tape 200 is in contact with the circumferential outer wall of the polyolefin inner sleeve 110, and the distance from a twisting head to a twisting point is 16 mm;

s5: in the armor tape 200 combination, the winding angles are required to be consistent, so that the contact strip 400 at the bottom of the armor strip 300 can be tightly attached to the previous winding position, and the inclined plates 410 in winding are mutually attached;

s6: the bottom of the secondary elastic plate 500 is bonded with a water insulation frame 510, a water absorbing glue stick 512 is inserted into an arc groove 511 of the water insulation frame 510, and after the water absorbing glue stick 512 is matched with the contact strip 400 to be wound and combined, the combined position of the water absorbing glue stick 512 can fill the contact gap of the contact strip 400;

s7: a main core sleeve 140 carrying a main guide core 141 and an auxiliary core sleeve 150 carrying an auxiliary guide core 151 are sequentially combined in the inner sleeve 120, the combination process needs to be ensured to be compact, and water-absorbing powder can be selectively filled in gaps;

s8: the whole pressing is carried out after the sleeving of the components is finished, a 2500Mpa isostatic press is adopted, the pressing time is 35min, the pressure is 7GPa, then the pressing is carried out for 35min again, the pressure is 10GPa, and the phenomena of disorder lines, line pressing, line loosening and the like are avoided;

s9: after the cable is rolled and formed, the cable is externally packaged, and surface identification is carried out and checked: factory name, overprint content, model, specification, year, cable number and rice standard; the printed characters are clear and firm, and have no error printing and missing printing.

Synthesize above, armor strip is connected in the bottom of armor area, the bottom of armor strip has the skewed tooth, can be when joining in marriage an armor strip and carry out the winding protection, increase the reservation between the armor combination and be full of the space of depositing, but the resiliency is good, effectively reduce control cable's mechanical damage probability, the crushing resistance promotes, and bond contact strip in the bottom of armor strip, the contact strip utilizes the swash plate to reduce the clearance in the winding combination, cooperate the insulating frame of combination on the vice elastic plate, can make the insulating frame in carry the water absorption glue rod of drier compression cover and fill with the clearance of winding combination, the separation is effectual, improve the damage probability because of receiving the tide and leading to.

While the invention has been described above with reference to an embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the various features of the embodiments disclosed herein may be used in any combination, provided that there is no structural conflict, and the combinations are not exhaustively described in this specification merely for the sake of brevity and conservation of resources. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

Claims (5)

1. A control cable with a B1-grade flame-retardant cross-linked polyethylene insulating polyolefin sheath is characterized in that: the water-insulating frame comprises a polyethylene outer sleeve (100), a polyolefin inner sleeve (110), an armor belt (200), an armor strip (300), a main elastic plate (320), a contact strip (400), an auxiliary elastic plate (500) and a water-insulating frame (510), wherein the armor belt (200) is sleeved inside the polyethylene outer sleeve (100), the polyolefin inner sleeve (110) is wound inside the circumference of the armor belt (200), the armor strip (300) is bonded on the inner side of the armor belt (200), the armor strip (300) is in a circular arc shape, the main elastic plate (320) is bonded at the bottom of an inner cavity of the armor strip (300), the contact strip (400) is bonded at the bottom of the armor strip (300), the auxiliary elastic plate (500) is bonded at the bottom of the auxiliary elastic plate (500), the water-insulating frame (510) is bonded at the bottom of the inner cavity of the polyolefin inner sleeve (110), and an inner sleeve (120) is sleeved on the circumferential inner wall of the polyolefin inner sleeve, the waterproof belt (130) is wound on the outer circumferential wall of the inner sleeve (120), the main core sleeve (140) is sleeved on the inner circumferential wall of the inner sleeve (120), the auxiliary core sleeve (150) is sleeved on the inner circumferential wall of the main core sleeve (140), the bottom of the armor strip (300) is integrally connected with the helical teeth (310), the left side wall and the right side wall of the contact strip (400) are integrally connected with the inclined plate (410), the left side wall and the right side wall of the water insulation frame (510) are integrally connected with the arc groove (511), the water-absorbing glue stick (512) is sleeved inside the arc groove (511), and the desiccant compression sleeve (513) is sleeved on the outer circumferential wall of the water-absorbing glue stick (512).

2. The control cable with flame retardant crosslinked polyethylene insulating polyolefin sheath of grade B1 according to claim 1, wherein: the armor belt (200) is made of a metal woven belt.

3. The control cable with flame retardant crosslinked polyethylene insulating polyolefin sheath of grade B1 according to claim 1, wherein: the inner wall of the circumference of the main core sleeve (140) is inserted with a main guide core (141), and the inner wall of the circumference of the auxiliary core sleeve (150) is inserted with an auxiliary guide core (151).

4. The control cable with flame retardant crosslinked polyethylene insulating polyolefin sheath of grade B1 according to claim 1, wherein: the material of the helical teeth (310) is a soft rubber plate, and the helical teeth (310) are uniformly connected to the outside of the armor strip (300) in a divergent structure.

5. A method for preparing the B1-grade flame-retardant crosslinked polyethylene insulated polyolefin sheathed control cable according to any one of claims 1 to 4, wherein the method comprises the following steps: the preparation method of the B1-grade flame-retardant cross-linked polyethylene insulated polyolefin sheath control cable comprises the following steps:

s1: selecting polyethylene: 20-60 parts; silica gel flame retardant powder: 5-12 parts of a solvent; lead-free PVC: 10-20 parts; releasing agent: 0.5-0.6 part; filling materials: 20-30 parts of the polyethylene jacket (100) by adopting a mechanical mixing mode, wherein the rotating speed of a motor of a mixer is 2000r/min, the temperature during mixing is 70-120 ℃, the mixture is cooled for 30-50 min after being mixed for 20-45 min, the mixture is inspected, the positions with impurities or uneven color values are picked and secondarily stirred, and the mixture is extruded by an extruder device;

s2: proportioning polyolefin insulating material, antioxidant, flame retardant, plasticizer, lubricant and colorant, weighing the materials in a proportion of 80: 5: 5: 8: 1: 1, adopting a mechanical mixing mode, mixing for 30-50 min at the temperature of 60-75 ℃, ensuring invasion of impurities, preventing material dirtying, ensuring no color value difference and no agglomeration of the ingredients, and extruding by matching an extruding device after pressing to obtain the polyolefin inner sleeve (110);

s3: taking the polyethylene outer sleeve (100), sleeving and combining a polyolefin inner sleeve (110) in the polyethylene outer sleeve (100), and inserting an inner sleeve (120) into the circumferential inner wall of the polyolefin inner sleeve (110);

s4: taking the armor tape (200), winding the armor tape on the circumferential outer wall of the polyolefin inner sleeve (110) in a winding machine, wherein the armor strip (300) on the inner side of the armor tape (200) is in contact with the circumferential outer wall of the polyolefin inner sleeve (110), and the distance from a twisting head to a twisting point is 13-20 mm;

s5: in the armor tape (200) combination, the winding angles are required to be consistent, so that the contact strip (400) at the bottom of the armor strip (300) can be tightly attached to the previous winding position, and the inclined plates (410) are mutually attached in the winding process;

s6: the water insulation frame (510) is bonded at the bottom of the auxiliary elastic plate (500), the water absorbing glue stick (512) is inserted into the arc groove (511) of the water insulation frame (510), and after the water absorbing glue stick (512) is matched with the contact strip (400) for winding and combination, the combination position of the water absorbing glue stick (512) can fill the contact gap of the contact strip (400);

s7: the main core sleeve (140) carrying the main guide core (141) and the auxiliary core sleeve (150) carrying the auxiliary guide core (151) are sequentially combined in the inner sleeve (120), the combination process needs to be ensured to be compact, and water-absorbing powder can be selectively filled in gaps;

s8: the components are integrally pressed after being sleeved, a 2500Mpa isostatic press is adopted, the pressing time is 25-45 min, the pressure is 3-7 GPa, then the components are pressed for 30-45 min again, the pressure is 6-10 GPa, and the phenomena of disorder lines, line pressing, line loosening and the like are avoided;

s9: after the cable is rolled and formed, the cable is externally packaged, and surface identification is carried out and checked: factory name, overprint content, model, specification, year, cable number and rice standard; the printed characters are clear and firm, and have no error printing and missing printing.

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