阅读说明：本技术 一种拉伸系统用抗拉型低损耗稳相螺旋同轴电缆及其生产方法 (Tensile type low-loss phase-stable spiral coaxial cable for stretching system and production method thereof ) 是由 季少波 刘波 张小平 姜超 彭达 汪磊 李世庆 于 2020-12-30 设计创作，主要内容包括：本发明公开了一种拉伸系统用抗拉型低损耗稳相螺旋同轴电缆及其生产方法,具体涉及电缆领域,包括电缆本体和聚四氟乙烯棒,所述电缆本体包括镀银铜合金内导体,所述镀银铜合金内导体外绕包有微孔聚四氟乙烯薄膜介质层,所述微孔聚四氟乙烯薄膜介质层外绕包有镀银扁铜带外导体,所述镀银扁铜带外导体外编织有镀银圆铜线紧固层,所述在镀银圆铜线紧固层外挤包有内护套,所述内护套外编织有阻水芳纶丝抗拉增强层,所述阻水芳纶丝抗拉增强层外挤包有外护套。本发明拉伸系统用抗拉型低损耗稳相螺旋同轴电缆及其生产方法,可以使得电缆整体具备优良的防水性和耐磨性,拉伸性和抗拉性较强,具有结构稳定、性能可靠、容易拉伸、机械性能优越的特点。(The invention discloses a tensile type low-loss phase-stable spiral coaxial cable for a stretching system and a production method thereof, and particularly relates to the field of cables. The tensile type low-loss phase-stable spiral coaxial cable for the stretching system and the production method thereof can ensure that the whole cable has excellent waterproofness and wear resistance, and has the characteristics of strong stretchability and tensile resistance, stable structure, reliable performance, easy stretching and excellent mechanical performance.)

1. The utility model provides a tensile type low-loss stationary phase spiral coaxial cable for tensile system, includes cable body (1) and polytetrafluoroethylene stick (12), its characterized in that: the cable comprises a cable body (1) and is characterized in that the cable body comprises a silver-plated copper alloy inner conductor (2), a microporous polytetrafluoroethylene film dielectric layer (3) is wrapped outside the silver-plated copper alloy inner conductor (2), a silver-plated flat copper out-of-band conductor (4) is wrapped outside the microporous polytetrafluoroethylene film dielectric layer (3), a silver-plated round copper wire fastening layer (5) is woven outside the silver-plated flat copper out-of-band conductor (4), an inner sheath (6) is extruded outside the silver-plated round copper wire fastening layer (5), a water-blocking aramid fiber tensile enhancement layer (7) is woven outside the inner sheath (6), and an outer sheath (8) is extruded outside the water-blocking aramid fiber tensile enhancement layer (7).

2. The tension-type low-loss phase-stable helical coaxial cable for the stretching system as claimed in claim 1, wherein: the cable body (1) is arranged in a shape consisting of a first straight line section (9), a spiral section (10) and a second straight line section (11).

3. The tension-type low-loss phase-stable helical coaxial cable for the stretching system as claimed in claim 1, wherein: the inner sheath (6) and the outer sheath (8) are made of polyurethane materials, the polyurethane is polyether polyurethane, and the Shore hardness is 93-95.

4. A method for producing a tension-type low-loss phase-stable helical coaxial cable for a stretching system according to any one of claims 1 to 3, comprising the steps of:

step S1: the silver-plated copper alloy drawn by the wire drawing die is used as an inner conductor, so that the roundness and the smoothness of the surface of the conductor are ensured to reduce the high-frequency attenuation of the conductor;

step S2: a constant-tension lapping production line is used for lapping a plurality of layers of microporous polytetrafluoroethylene films as the dielectric layers of the cable outside the inner conductor, the lapping pitch is controlled within 2%, and the lapping overlapping rate is controlled within 3%;

step S3: a layer of silver-plated flat copper strip is lapped outside the dielectric layer by a constant-tension lapping production line to be used as an outer conductor, the lapping pitch is controlled within 0.8%, and the lapping overlapping rate is controlled within 1%;

step S4: weaving a layer of multi-strand silver-plated round copper wires outside the outer conductor to serve as a weaving fastening layer, wherein the weaving density is controlled to be not less than 85%, and the weaving angle is controlled to be 43-47 degrees;

step S5: and extruding a layer of polyether polyurethane material with the Shore hardness of 93-95 outside the woven fastening layer by using a low-temperature extruding machine to serve as an inner sheath (6) of the cable, wherein the temperature of a feed inlet of the extruding machine is set to be 150 +/-10 ℃, the temperature of a machine head of the extruding machine is set to be 168 +/-10 ℃, and the temperature of a screw heating area between the feed inlet of the extruding machine and the machine head of the extruding machine is set to be increased in a stepped manner.

Step S6: a layer of waterproof aramid fiber tensile enhancement layer (7) is woven outside the inner sheath (6), the weaving density is 42-58%, and the weaving angle is 58-72 degrees;

step S7: a layer of polyether polyurethane material with the Shore hardness of 93-95 is extruded outside the woven tensile enhancement layer by a low-temperature extruding machine to serve as an outer sheath (8) of the cable, the temperature of a feed inlet of the extruding machine is set to be 150 +/-10 ℃, the temperature of a machine head of the extruding machine is set to be 168 +/-10 ℃, and the temperature is set to be increased in a stepped manner in a screw heating area between the feed inlet of the extruding machine and the machine head of the extruding machine;

step S8: spirally winding the cable on a polytetrafluoroethylene rod (12), sealing the sections of two ends of the straight line section by adopting a high-temperature sleeve, keeping the straight line sections of the two ends parallel to the polytetrafluoroethylene rod (12), and enabling the straight line section and the spiral section to form a 90-degree angle, wherein the included angle between the straight line section and the spiral section is fixed by adopting a high-temperature clamp to form a spiral cable prototype;

step S9: placing the spiral cable prototype on an iron frame of a high-temperature box to ensure that the spiral cable prototype does not contact the high-temperature box, setting the temperature of the high-temperature box to be 130-150 ℃, and setting the high-temperature setting time to be 20-30 min;

step S10: taking out the shaped spiral cable, and cooling by adopting circulating water to ensure that the sections at the two ends of the straight line section do not enter water;

step S11: and (3) scattering the cooled spiral cable from the polytetrafluoroethylene rod (12), and taking down the high-temperature sleeves at two ends of the straight line section to obtain a final finished product.

Technical Field

The invention relates to the technical field of cables, in particular to a tensile type low-loss phase-stable spiral coaxial cable for a stretching system and a production method thereof.

Background

With the high-speed development of the modern radio communication industry, the requirement on a feeder cable for connecting an antenna is higher and higher, the feeder cable is required to be frequently stretched in a special environment, the common feeder cable is usually a straight line, the straight line feeder is too disordered in wiring due to limited structure and is not beneficial to frequent stretching and releasing, and compared with the spiral feeder, the spiral feeder has the characteristics of stable structure, reliable performance, easiness in stretching and excellent mechanical performance.

Disclosure of Invention

In order to overcome the above-mentioned defects in the prior art, embodiments of the present invention provide a tensile type low-loss phase-stable spiral coaxial cable for a stretching system and a production method thereof, and the problems to be solved by the present invention are: the existing cable is limited in structure, and the problem that the existing cable is not favorable for frequent stretching and retraction due to excessively disordered wiring is solved.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a tensile type low-loss steady phase spiral coaxial cable for tensile system, includes cable body and polytetrafluoroethylene stick, the cable body is including silver-plated copper alloy inner conductor, silver-plated copper alloy inner conductor winds outward and has micropore polytetrafluoroethylene film dielectric layer, micropore polytetrafluoroethylene film dielectric layer winds outward and has wrapped silver-plated band copper outband conductor, silver-plated round copper line fastening layer has been woven outward to silver-plated band copper out-of-band conductor, crowded package has the inner sheath outside silver-plated round copper line fastening layer, the aramid fiber tensile enhancement layer that blocks water has been woven outward to the inner sheath, crowded package has the oversheath outside the aramid fiber tensile enhancement layer that blocks water.

Preferably, the cable body is provided with a shape consisting of a first straight line section, a spiral section and a second straight line section.

Preferably, the inner sheath and the outer sheath are made of polyurethane materials, the polyurethane is polyether polyurethane, and the Shore hardness is 93-95.

A production method of a tensile type low-loss phase-stable spiral coaxial cable for a stretching system is characterized by comprising the following steps:

step S1: the silver-plated copper alloy drawn by the wire drawing die is used as an inner conductor, so that the roundness and the smoothness of the surface of the conductor are ensured to reduce the high-frequency attenuation of the conductor;

step S2: a constant-tension lapping production line is used for lapping a plurality of layers of microporous polytetrafluoroethylene films as the dielectric layers of the cable outside the inner conductor, the lapping pitch is controlled within 2%, and the lapping overlapping rate is controlled within 3%;

step S3: a layer of silver-plated flat copper strip is lapped outside the dielectric layer by a constant-tension lapping production line to be used as an outer conductor, the lapping pitch is controlled within 0.8%, and the lapping overlapping rate is controlled within 1%;

step S4: weaving a layer of multi-strand silver-plated round copper wires outside the outer conductor to serve as a weaving fastening layer, wherein the weaving density is controlled to be not less than 85%, and the weaving angle is controlled to be 43-47 degrees;

step S5: and extruding a layer of polyether polyurethane material with the Shore hardness of 93-95 outside the woven fastening layer by using a low-temperature extruding machine to serve as an inner sheath of the cable, setting the temperature of a feed inlet of the extruding machine to be 150 +/-10 ℃, setting the temperature of a machine head of the extruding machine to be 168 +/-10 ℃, and setting the temperature to be increased in a stepped manner in a screw heating area between the feed inlet of the extruding machine and the machine head of the extruding machine.

Step S6: a layer of waterproof aramid fiber tensile enhancement layer is woven outside the inner sheath, the weaving density is 42-58%, and the weaving angle is 58-72 degrees;

step S7: a layer of polyether polyurethane material with the Shore hardness of 93-95 is extruded outside the woven tensile enhancement layer by a low-temperature extruding machine to serve as an outer sheath of the cable, the temperature of a feed inlet of the extruding machine is set to be 150 +/-10 ℃, the temperature of a machine head of the extruding machine is set to be 168 +/-10 ℃, and the temperature of a screw heating area between the feed inlet of the extruding machine and the machine head of the extruding machine is set to be increased in a stepped mode;

step S8: spirally winding the cable on a polytetrafluoroethylene rod, sealing the sections of two ends of the straight line section by adopting a high-temperature sleeve, keeping the straight line sections of the two ends parallel to the polytetrafluoroethylene rod, enabling the straight line section and the spiral section to be 90 degrees, and fixing the included angle between the straight line section and the spiral section by adopting a high-temperature clamp to form a spiral cable prototype;

step S9: placing the spiral cable prototype on an iron frame of a high-temperature box to ensure that the spiral cable prototype does not contact the high-temperature box, setting the temperature of the high-temperature box to be 130-150 ℃, and setting the high-temperature setting time to be 20-30 min;

step S10: taking out the shaped spiral cable, and cooling by adopting circulating water to ensure that the sections at the two ends of the straight line section do not enter water;

step S11: and (4) scattering the cooled spiral cable from the polytetrafluoroethylene rod, and taking down the high-temperature sleeves at two ends of the straight line section to obtain a final finished product.

The invention has the technical effects and advantages that:

1. according to the tensile type low-loss phase-stable spiral coaxial cable for the stretching system, the inner sheath and the outer sheath are made of polyurethane materials, specifically polyether polyurethane, and the polyether polyurethane sheath materials are adopted, so that the cable has excellent water resistance and wear resistance.

2. The tensile type low-loss phase-stable spiral coaxial cable for the stretching system is characterized in that a polyurethane sheath is adopted, the coaxial cable is spirally wound on a polytetrafluoroethylene rod to be shaped at high temperature, a straight line segment, a spiral segment and a straight line segment are prepared, the cable can be changed into a spiral shape through high-temperature spiral shaping, the cable has the tensile property, and the spiral cable has good rebound rate after being stretched.

3. The tensile type low-loss phase-stable spiral coaxial cable for the stretching system has the advantages that the tensile property is good due to the fact that the water-blocking aramid fiber wires are used as the tensile enhancement layer, the service life of the stretching of the spiral section of the cable is longer than 10000 times, and the tensile property of the cable is effectively improved.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

The reference signs are: 1. a cable body; 2. plating a silver-plated copper alloy inner conductor; 3. a microporous polytetrafluoroethylene film dielectric layer; 4. silver-plated flat copper strip outer conductors; 5. a silver-plated round copper wire fastening layer; 6. an inner sheath; 7. a waterproof aramid fiber tensile reinforcement layer; 8. an outer sheath; 9. a first straight line segment; 10. a helical section; 11. a second straight line segment; 12. a polytetrafluoroethylene rod.

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 tensile type low-loss phase-stable spiral coaxial cable for the stretching system comprises a cable body 1 and a polytetrafluoroethylene rod 12, wherein the cable body 1 comprises a silver-plated copper alloy inner conductor 2, a microporous polytetrafluoroethylene film dielectric layer 3 is wound outside the silver-plated copper alloy inner conductor 2, a silver-plated flat copper outer conductor 4 is wound outside the microporous polytetrafluoroethylene film dielectric layer 3, a silver-plated flat copper wire fastening layer 5 is woven outside the silver-plated flat copper wire outer conductor 4, an inner sheath 6 is extruded outside the silver-plated round copper wire fastening layer 5, a water-blocking aramid fiber tensile enhancement layer 7 is woven outside the inner sheath 6, and an outer sheath 8 is extruded outside the water-blocking aramid fiber tensile enhancement layer 7.

The cable body 1 is provided with a shape consisting of a first straight line section 9, a spiral section 10 and a second straight line section 11.

The inner sheath 6 and the outer sheath 8 are both made of polyurethane materials, the polyurethane is polyether polyurethane, and the Shore hardness is 93-95.

A production method of a tensile type low-loss phase-stable spiral coaxial cable for a stretching system is characterized by comprising the following steps:

step S1: the silver-plated copper alloy drawn by the wire drawing die is used as an inner conductor, so that the roundness and the smoothness of the surface of the conductor are ensured to reduce the high-frequency attenuation of the conductor;

step S2: a constant-tension lapping production line is used for lapping a plurality of layers of microporous polytetrafluoroethylene films as the dielectric layers of the cable outside the inner conductor, the lapping pitch is controlled within 2%, and the lapping overlapping rate is controlled within 3%;

step S3: a layer of silver-plated flat copper strip is lapped outside the dielectric layer by a constant-tension lapping production line to be used as an outer conductor, the lapping pitch is controlled within 0.8%, and the lapping overlapping rate is controlled within 1%;

step S4: weaving a layer of multi-strand silver-plated round copper wires outside the outer conductor to serve as a weaving fastening layer, wherein the weaving density is controlled to be not less than 85%, and the weaving angle is controlled to be 43-47 degrees;

step S5: and extruding a layer of polyether polyurethane material with the Shore hardness of 93-95 outside the woven fastening layer by using a low-temperature extruding machine to serve as an inner sheath 6 of the cable, setting the temperature of a feed inlet of the extruding machine to be 150 +/-10 ℃, setting the temperature of a machine head of the extruding machine to be 168 +/-10 ℃, and setting the temperature to be increased in a stepped manner in a screw heating area between the feed inlet of the extruding machine and the machine head of the extruding machine.

Step S6: a layer of waterproof aramid fiber tensile enhancement layer 7 is woven outside the inner sheath 6, the weaving density is 42-58%, and the weaving angle is 58-72 degrees;

step S7: a layer of polyether polyurethane material with the Shore hardness of 93-95 is extruded outside the woven tensile enhancement layer to serve as an outer sheath 7 of the cable, the temperature of a feed inlet of the extruding machine is set to be 150 +/-10 ℃, the temperature of a machine head of the extruding machine is set to be 168 +/-10 ℃, and the temperature is set to be increased in a stepped mode in a screw heating area between the feed inlet of the extruding machine and the machine head of the extruding machine;

step S8: spirally winding the cable on a polytetrafluoroethylene rod 12, sealing the sections of two ends of the straight line section by adopting a high-temperature sleeve, keeping the straight line sections of the two ends parallel to the polytetrafluoroethylene rod 12 to enable the straight line section and the spiral section to be 90 degrees, and fixing the included angle between the straight line section and the spiral section by adopting a high-temperature clamp to form a spiral cable prototype;

step S9: placing the spiral cable prototype on an iron frame of a high-temperature box to ensure that the spiral cable prototype does not contact the high-temperature box, setting the temperature of the high-temperature box to be 130-150 ℃, and setting the high-temperature setting time to be 20-30 min;

step S10: taking out the shaped spiral cable, and cooling by adopting circulating water to ensure that the sections at the two ends of the straight line section do not enter water;

step S11: and (4) scattering the cooled spiral cable from the polytetrafluoroethylene rod, and taking down the high-temperature sleeves at two ends of the straight line section to obtain a final finished product.

And finally: the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention are intended to be included in the scope of the present invention.