CN109524183B - Isolation voltage-sharing loss-reducing device for high-power long-wave communication antenna - Google Patents
Isolation voltage-sharing loss-reducing device for high-power long-wave communication antenna Download PDFInfo
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- CN109524183B CN109524183B CN201811358994.9A CN201811358994A CN109524183B CN 109524183 B CN109524183 B CN 109524183B CN 201811358994 A CN201811358994 A CN 201811358994A CN 109524183 B CN109524183 B CN 109524183B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/42—Means for obtaining improved distribution of voltage; Protection against arc discharges
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/38—Fittings, e.g. caps; Fastenings therefor
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
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Abstract
The invention provides an isolation voltage-sharing loss-reducing device for a high-power long-wave communication antenna, which is characterized in that: including last gold utensil, lower gold utensil and last equalizer ring, lower equalizer ring that the longitudinal symmetry set up, go up and be equipped with the plug between gold utensil and the lower gold utensil, be equipped with sheath and full skirt outside the plug in proper order, the gold utensil bottom is connected with load part shell down, is equipped with pre-buried optic fibre in the device, and pre-buried optic fibre passes in proper order and reserves the via hole on the gold utensil, the clearance between plug and the sheath, the lower gold utensil. The invention adopts special structural design, the tensile material of the mooring rope antenna is completely arranged in the metal cavity, so that the tensile material is in a very low electric field environment, and the catastrophic effect that the antenna is broken and the balloon is detached due to heating caused by medium loss under high field intensity is avoided; through the structural optimization design, the tail end of the antenna does not generate corona discharge, and the phenomena of power loss, radio interference, incapability of normally working of a system when the corona is serious and the like caused by the corona discharge are avoided.
Description
Technical Field
The invention belongs to the fields of long-wave communication, electric field intensity optimization and electrical isolation, and particularly relates to an isolation voltage-sharing loss-reducing device for a balloon lifting type high-power long-wave communication system antenna.
Background
When the high-power long-wave communication system works, the local electric field intensity at the top end of the antenna is very high (up to millions of V/m). When the local electric field strength exceeds the air ionization field strength, the air is ionized, and corona discharge occurs. Corona discharge causes power loss, radio interference, and noise interference, which in severe cases can cause the communication system to fail to operate properly. In addition, the tensile material at the end of the radiator at the top of the antenna is in a high-field strength and high-frequency (relative to power frequency) environment, a dielectric heating phenomenon caused by dielectric loss can occur, and an extreme case that the antenna is damaged or even broken due to overhigh temperature can occur in a serious case. Especially for balloon-lifting high-power long-wave communication antenna systems, antenna breakage will have catastrophic consequences of the tethered platform being disconnected.
How to solve the corona discharge and dielectric loss heating caused by the high field intensity at the tail end of the antenna and realize the electrical isolation between the antenna radiator and the mooring platform is a key technical problem influencing the safe and reliable operation of the balloon lifting type long-wave communication system. In the prior art in China, the isolation between an antenna and a mooring platform is realized by using an insulating cable with a certain length, and the problem of medium loss and heating caused by high field intensity at the tail end of the antenna is not deeply considered, so that a catastrophic accident that the mooring platform is disconnected due to antenna breakage in the loading and debugging process of a communication system occurs.
Aiming at the problems in the prior art, the inventor proposes an isolation voltage-sharing loss-reducing device for a high-power long-wave communication antenna, which can realize the electrical isolation between the high-power long-wave communication antenna and a floating platform, homogenizes the electric field intensity at the tail end of the top of the antenna to ensure that no obvious corona discharge phenomenon exists at the tail end of the top of the antenna in a normal working state, eliminates the hidden danger that the broken balloon of the antenna is disconnected due to heating caused by dielectric loss under high field intensity, can realize lightning current release when a mooring platform is struck by lightning, can obviously improve the electrical safety of the high-power long-wave communication antenna, and ensures the safe and reliable operation of a long-wave.
Disclosure of Invention
Aiming at the problems in the prior art, the technical scheme adopted by the invention for solving the problems in the prior art is as follows:
the utility model provides a high-power long wave communication antenna is with keeping apart voltage-sharing and reducing and decrease device which characterized in that: including last gold utensil, lower gold utensil and last equalizer ring, lower equalizer ring that the longitudinal symmetry set up, go up and be equipped with the plug between gold utensil and the lower gold utensil, be equipped with sheath and full skirt outside the plug in proper order, the gold utensil bottom is connected with load part shell down, is equipped with pre-buried optic fibre in the device, and pre-buried optic fibre passes in proper order and reserves the via hole on the gold utensil, the clearance between plug and the sheath, the lower gold utensil.
The core rod is made of epoxy resin serving as a base material and glass fiber and other additives through drawing, the diameter of the core rod is not less than 24mm, the mechanical breaking force load is not less than 100kN, and the mechanical torsion load is not less than 100 Nm.
The umbrella skirt is a plurality of cone sheet-shaped structures which are arranged along the core rod sheath in a wrapping mode from top to bottom, the upper layer and the lower layer of annular cone sheets are arranged in parallel at equal intervals, and the umbrella skirt is made of silicon rubber materials.
The jacket is made of silicon rubber materials, a gap is reserved between the jacket and the core rod for the pre-buried optical fiber to pass through, the pre-buried optical fiber is laid in the gap between the jacket and the core rod in advance, and then the gap is filled and sealed with epoxy resin.
The upper hardware fitting and the lower hardware fitting are made of non-magnetic stainless steel, eddy current loss and heating caused by an alternating magnetic field at the tail end of an antenna are avoided, through holes with the diameter not smaller than 4mm are formed in the connecting ends of the upper hardware fitting and the lower hardware fitting and the mandrel, pre-buried optical fibers (communication optical fibers between the mooring platform and the ground) can penetrate through the through holes, and cavities with the diameter not smaller than 45mm are formed in the opening ends of the upper hardware fitting and the lower hardware fitting and used for placing redundant optical fibers in a coiled mode.
The connection mode between the core rod and the upper hardware fitting and the lower hardware fitting is mechanical compression joint.
The bearing part shell is of a circular cavity structure with an opening at one end and a semi-closed end, the diameter of the cavity is not less than 45mm, the bearing part shell is made of nonmagnetic stainless steel, after the bearing part is installed on the bearing part shell through the semi-closed opening at the bottom of the shell, a closed cavity is formed between the bearing part shell and a lower hardware fitting, and the tensile material at the tail end of the mooring cable antenna is completely arranged in the metal closed cavity, so that the tensile material is in an extremely low electric field environment, and the catastrophic consequence that the antenna rupture balloon is detached due to heating caused by medium loss under high field intensity is avoided.
And the connecting end between the bearing part shell and the lower hardware fitting is provided with a flange plate, and the bearing part shell and the lower hardware fitting are connected and fixed through bolts arranged in the circumferential direction.
Go up equalizer ring and equalizer ring longitudinal symmetry setting down, include the annular circle of the arc body of rod and bottom intercommunication that sets up along device circumference bilateral symmetry, go up equalizer ring and equalizer ring down and make by the aluminum alloy, cyclic annular external diameter is not less than 300mm, go up between equalizer ring and the equalizer ring annular circle clearance distance and keep apart the whole length that the voltage-sharing decreased the device and be relevant, when whole length changes, then should adjust this clearance distance to this clearance breaks down earlier when ensureing the thunderbolt, rather than following the umbrella crowd surface discharge.
And chamfering the structural corners of the lower hardware fitting and the bearing part shell, wherein the curvature radius of the chamfer is not less than 10mm, so that the electric field intensity at the tail end of the top of the antenna is better homogenized.
The invention has the following advantages:
the invention adopts special structural design, the tensile material of the mooring rope antenna is completely arranged in the metal cavity, so that the tensile material is in an extremely low electric field environment, and the catastrophic effect of the antenna breaking balloon off from the mooring rope caused by medium loss heating under high field intensity is avoided; through the structure optimization design of the lower hardware fitting and the auxiliary equalizing ring for reducing the external field intensity, the tail end of the antenna does not generate corona discharge under the normal working state, and the phenomena of power loss, radio interference, incapability of normally working of the system when the corona is serious and the like caused by the corona discharge are avoided.
Drawings
FIG. 1 is a cross-sectional view of an isolation, voltage-sharing and loss-reducing device for a high-power long-wavelength communication antenna according to the present invention;
wherein: 1-upper hardware fitting, 2-upper grading ring, 3-umbrella group, 4-sheath, 5-core rod, 6-lower grading ring, 7-lower hardware fitting, 8-bearing part shell and 9-embedded optical fiber.
Detailed Description
The technical scheme of the invention is further specifically described below by an embodiment and with reference to the accompanying drawings, as shown in fig. 1, the isolation voltage-sharing loss-reducing device for the high-power long-wavelength communication antenna comprises an upper hardware fitting 1, a lower hardware fitting 7, an upper voltage-sharing ring 2 and a lower voltage-sharing ring 6 which are arranged in an up-and-down symmetrical manner, a mandrel 5 is arranged between the upper hardware fitting 1 and the lower hardware fitting 7, a sheath 4 and an umbrella skirt 3 are sequentially arranged outside the mandrel 5, a bearing part shell 8 is connected to the bottom of the lower hardware fitting 7, a pre-embedded optical fiber 9 is arranged in the device, and the pre-embedded optical fiber 9 sequentially penetrates through a reserved through hole on the upper hardware fitting 1, a gap between the mandrel 5 and the.
The core rod 5 is made by adopting epoxy resin as a base material and adding glass fiber and other additives for drawing, the diameter of the core rod is not less than 24mm, the mechanical breaking force load is not less than 100kN, and the mechanical torsion load is not less than 100 Nm.
The umbrella skirt 3 is a plurality of cone sheet-shaped structures which are arranged along the core rod sheath in a wrapping mode from top to bottom, the upper layer and the lower layer of annular cone sheets are arranged in parallel at equal intervals, and the umbrella skirt 3 is made of silicon rubber materials.
The sheath 4 is made of silicon rubber materials, a gap is reserved between the sheath 4 and the core rod 5 for the pre-buried optical fiber 9 to pass through, the pre-buried optical fiber 9 is laid in the gap between the sheath 4 and the core rod 5 in advance, and then the gap is filled and sealed with epoxy resin.
The upper hardware fitting 1 and the lower hardware fitting 7 are both made of non-magnetic stainless steel, eddy current loss and heating caused by an alternating magnetic field at the tail end of an antenna are avoided, and through holes with the diameter not smaller than 4mm are formed in the connecting ends of the upper hardware fitting 1 and the lower hardware fitting 7 and the core rod 5, so that the embedded optical fiber 9 (communication optical fiber between the mooring platform and the ground) can penetrate through the through holes. And the opening ends of the upper hardware fitting 1 and the lower hardware fitting 7 are provided with cavities with diameters not less than 45mm, and the cavities are used for coiling redundant optical fibers.
The connection mode between the core rod 5 and the upper hardware fitting 1 and the lower hardware fitting 7 is mechanical crimping.
The bearing part shell 8 is a circular cavity structure with an opening at one end and a semi-closed end, the diameter of the cavity is not less than 45mm, the bearing part shell 8 is made of nonmagnetic stainless steel, after the bearing part is installed on the bearing part shell 8 through the semi-closed opening at the bottom of the shell, a closed cavity is formed between the bearing part shell 8 and the lower hardware fitting 7, and the tensile material at the tail end of the mooring cable antenna is completely arranged in the metal closed cavity, so that the tensile material is in an extremely low electric field environment, and the catastrophic consequence that the antenna rupture balloon is detached due to heating caused by medium loss under high field intensity is avoided.
The connecting end between bearing part shell 8 and the lower hardware fitting 7 is provided with a flange plate, and the bearing part shell 8 and the lower hardware fitting 7 are connected and fixed through bolts arranged in the circumferential direction.
Go up equalizer ring 2 and 6 longitudinal symmetries of equalizer ring down and set up, include the annular ring of the arc body of rod and bottom intercommunication that sets up along device circumference bilateral symmetry, go up equalizer ring 2 and equalizer ring 6 and make by the aluminum alloy down, the annular external diameter is not less than 300mm, it is relevant with the whole length of keeping apart voltage-sharing and decreasing the loss device to go up annular ring clearance distance between equalizer ring 2 and the equalizer ring 6 down, when whole length changes, then should adjust this clearance distance, in order to ensure that this clearance ratio punctures earlier when thunderbolt, and not along 3 surface discharges of parachute crowd, annular ring clearance distance is not more than 400mm between upper equalizer ring 2 and the equalizer ring 6 down in this embodiment, in order to ensure when the platform that moors and suffers the thunderbolt, the air gap ratio between upper equalizer ring 2 and the equalizer ring 6 down punctures earlier, the lightning current of releasing.
And chamfering the structural corners of the lower hardware fitting 7 and the bearing part shell 8, wherein the curvature radius of the chamfer is not less than 10mm, so that the electric field intensity at the tail end of the top of the antenna is better homogenized.
The device of the invention is used for carrying out a visible corona voltage test:
gradually applying power frequency voltage to the sample until corona generation is observed, maintaining for 5min, and recording the test voltage value (U)1) Then, the test voltage was gradually decreased until the corona on the test article disappeared, maintained for 5min, and the test voltage value (U) was recorded2)。
The test steps are repeated three times, and the average value of the test voltages of the three times is taken as the corona starting voltage and the corona extinguishing voltage of the test article.
The detection results are as follows:
ambient temperature: 22 degrees celsius, relative humidity: 72 percent
The test sample number is GJJ-1-D L96:
the test sample number is GJJ-2-D L120:
the test sample numbers are GJJ-2-D L72-64:
the sample of the isolation voltage-sharing loss reducer used for the test is designed for a long-wave communication system with the rated working voltage of 110kV at the top of the antenna, the test result shows that the average values of the corona starting voltages are respectively 166kV, 186kV and 160kV, which are all far higher than the rated working voltage of 110kV at the top of the antenna, and the corona starting parts are not on the isolation voltage-sharing loss reducer but on the mooring cable and accessories thereof. The isolation voltage-sharing loss reducer designed by the invention has an obvious electric field homogenizing effect, can ensure that no obvious corona discharge exists at the tail end of the top of the antenna under a normal working state, eliminates the hidden danger of disconnection of the broken balloon of the antenna caused by medium loss heating under high field intensity, and obviously improves the electrical safety of the high-power long-wave communication antenna.
The protective scope of the present invention is not limited to the above-described embodiments, and it is apparent that various modifications and variations can be made to the present invention by those skilled in the art without departing from the scope and spirit of the present invention. It is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.
Claims (9)
1. The utility model provides a high-power long wave communication antenna is with keeping apart voltage-sharing and reducing and decrease device which characterized in that: the device comprises an upper hardware fitting, a lower hardware fitting, an upper equalizing ring and a lower equalizing ring which are arranged in an up-and-down symmetrical mode, wherein a core rod is arranged between the upper hardware fitting and the lower hardware fitting, a protective sleeve and an umbrella skirt are sequentially arranged outside the core rod, the bottom of the lower hardware fitting is connected with a bearing part shell, the bearing part shell is of a circular cavity structure with one open end and one semi-closed end, the bearing part shell is made of nonmagnetic stainless steel, a metal closed cavity is formed between the bearing part shell and the lower hardware fitting, when the device is installed and connected with a mooring cable antenna, all tensile materials at the tail end of the antenna are arranged in the metal closed cavity, the tensile materials are in an extremely low electric field environment, pre-buried optical fibers are arranged in the device, and sequentially penetrate through holes reserved in the upper hardware fitting, gaps between the core rod and the protective sleeve, through holes.
2. The isolating, voltage-sharing and loss-reducing device for the high-power long-wavelength communication antenna according to claim 1, wherein: the core rod is made of epoxy resin serving as a base material and glass fiber and additives through drawing, the diameter of the core rod is not less than 24mm, the mechanical breaking force load is not less than 100kN, and the mechanical torsion load is not less than 100 Nm.
3. The isolating, voltage-sharing and loss-reducing device for the high-power long-wavelength communication antenna according to claim 1, wherein: the umbrella skirt is a plurality of cone sheet-shaped structures which are arranged along the core rod sheath in a wrapping mode from top to bottom, the upper layer and the lower layer of annular cone sheets are arranged in parallel at equal intervals, and the umbrella skirt is made of silicon rubber materials.
4. The isolating, voltage-sharing and loss-reducing device for the high-power long-wavelength communication antenna according to claim 1, wherein: the jacket is made of silicon rubber materials, a gap is reserved between the jacket and the core rod for the pre-buried optical fiber to pass through, the pre-buried optical fiber is laid in the gap between the jacket and the core rod in advance, and then the gap is filled and sealed with epoxy resin.
5. The isolating, voltage-sharing and loss-reducing device for the high-power long-wavelength communication antenna according to claim 1, wherein: the upper hardware fitting and the lower hardware fitting are made of non-magnetic stainless steel, eddy current loss and heating caused by an alternating magnetic field at the tail end of the antenna are avoided, through holes with the diameter not smaller than 4mm are formed in the connecting ends of the upper hardware fitting and the lower hardware fitting and the mandrel, embedded optical fibers can penetrate through the through holes, and cavities with the diameter not smaller than 45mm are formed in the opening ends of the upper hardware fitting and the lower hardware fitting and used for placing redundant optical fibers in a coiled mode.
6. The isolating, voltage-sharing and loss-reducing device for the high-power long-wavelength communication antenna according to claim 1, wherein: the diameter of the cavity of the circular cavity structure is not less than 45 mm.
7. The isolating, voltage-sharing and loss-reducing device for the high-power long-wavelength communication antenna according to claim 1, wherein: the connecting end between the bearing part shell and the lower hardware fitting is provided with a flange plate, and the bearing part shell and the lower hardware fitting are connected and fixed through a plurality of bolts arranged in the circumferential direction.
8. The isolating, voltage-sharing and loss-reducing device for the high-power long-wavelength communication antenna according to claim 1, wherein: go up equalizer ring and equalizer ring longitudinal symmetry setting down, include the arc body of rod and the annular ring of bottom intercommunication that set up along device circumference bilateral symmetry, go up equalizer ring and equalizer ring down and make by the aluminum alloy, annular external diameter is not less than 300mm, goes up equalizer ring and sets up the regulation according to the whole length of keeping apart voltage-sharing and reducing the loss device between the equalizer ring, to this clearance ratio punctures earlier when guaranteeing the thunderbolt, rather than discharging along the full skirt surface.
9. The isolating, voltage-sharing and loss-reducing device for the high-power long-wavelength communication antenna according to claim 1, wherein: and chamfering the structural corners of the lower hardware fitting and the bearing part shell, wherein the radius of curvature of the chamfer is not less than 10 mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811358994.9A CN109524183B (en) | 2018-11-15 | 2018-11-15 | Isolation voltage-sharing loss-reducing device for high-power long-wave communication antenna |
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| CN201811358994.9A CN109524183B (en) | 2018-11-15 | 2018-11-15 | Isolation voltage-sharing loss-reducing device for high-power long-wave communication antenna |
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| CN109524183A CN109524183A (en) | 2019-03-26 |
| CN109524183B true CN109524183B (en) | 2020-07-24 |
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| JP3802776B2 (en) * | 2001-05-08 | 2006-07-26 | 古河電気工業株式会社 | Optical fiber built-in insulator |
| JP4460043B2 (en) * | 2001-07-23 | 2010-05-12 | 古河電気工業株式会社 | Optical fiber built-in insulator |
| CN2582013Y (en) * | 2002-11-20 | 2003-10-22 | 顺德特种变压器厂 | Hanging optical fibre composite isolator |
| CN203630406U (en) * | 2013-12-01 | 2014-06-04 | 国家电网公司 | High-voltage insulation optical fiber post |
| CN106816234A (en) * | 2015-12-02 | 2017-06-09 | 襄阳国网合成绝缘子有限责任公司 | A kind of lightning protection optical fiber composite insulator |
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Address after: 430070 Hubei Province, Wuhan city Hongshan District Luoshi Road No. 122 Patentee after: WUHAN University OF TECHNOLOGY Patentee after: CLP Great Wall SHENGFEI Information System Co.,Ltd. Address before: 430070 Hubei Province, Wuhan city Hongshan District Luoshi Road No. 122 Patentee before: WUHAN University OF TECHNOLOGY Patentee before: BEIJING SHENGFEIFAN ELECTRONIC SYSTEM TECHNOLOGY DEVELOPMENT Co.,Ltd. |
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