CN107356803B - Safety detection equipment for overhauling high-power short-wave antenna feeder line - Google Patents
Safety detection equipment for overhauling high-power short-wave antenna feeder line Download PDFInfo
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- CN107356803B CN107356803B CN201710572460.5A CN201710572460A CN107356803B CN 107356803 B CN107356803 B CN 107356803B CN 201710572460 A CN201710572460 A CN 201710572460A CN 107356803 B CN107356803 B CN 107356803B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
- G01R19/16576—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 comparing DC or AC voltage with one threshold
Abstract
The invention discloses a safety detection device for overhauling a high-power short-wave antenna feeder line, which comprises: a voltage detector and a feeder ground safety device; wherein the voltage detector includes: the short-wave antenna is used for receiving short-wave high-frequency signals; a voltage detection circuit for converting the high-frequency signal into a direct-current voltage; the voltage detection circuit is used for detecting whether the voltage value of the direct current voltage is larger than a preset high-frequency voltage value or not and sending a trigger voltage to the alarm circuit when the voltage value of the direct current voltage is larger than the preset high-frequency voltage value; the alarm circuit is used for alarming according to the trigger voltage; and a feeder grounding safety device for carrying the voltage detector. The short-wave antenna is adopted to carry out non-contact detection on the antenna feeder line to be overhauled, whether the line is electrified or not can be detected without the need of contact of an overhauler with the antenna feeder line, the personal safety of the overhauler is ensured, and the problems that the short-wave high-frequency voltage cannot be detected and the high-frequency discharge is easily caused by contact detection in the prior art are solved.
Description
Technical Field
The invention relates to the field of medium and short wave antenna feeder line maintenance, in particular to a safety detection device for maintaining a high-power short wave antenna feeder line.
Background
At present, no special safety detection equipment exists in medium and short wave antenna feeder line maintenance work, a high-voltage electroscope and a high-voltage grounding wire in electric power supply maintenance work are generally applied, and the high-voltage electroscope is a device for detecting whether equipment and lines are electrified or not by mainly detecting current flowing through an electroscope in stray capacitance to the ground. The high-voltage grounding wire is used for grounding a line during line and power transformation construction, and is used for ensuring safety when an adjacent charged body generates electrostatic induction electric shock or is switched on by mistake.
The existing high-voltage electroscope and high-voltage grounding wire are mainly used in the environment of more than 10kV under power frequency, but the high-voltage electroscope cannot detect the high-frequency voltage of short wave 3.2M-26.1MHz, and meanwhile, the high-voltage electroscope is a device for detecting whether equipment and a circuit are electrified or not by detecting the current flowing through a stray capacitance of the electroscope to the ground, and is required to be in contact with an electrified body, but the high-frequency electrified body is in contact with a metal body to easily cause high-frequency discharge, so that a contact body is damaged; the existing high-voltage grounding wire adopts single-point grounding, and a high-power short-wave feeder (namely an antenna feeder) is a balance feeder, so that two points need to be short-circuited and grounded simultaneously to ensure the safety of maintainers, and the existing high-voltage detection grounding device cannot meet the requirements.
Disclosure of Invention
The invention provides a safety detection device for overhauling a high-power short-wave antenna feeder line, which is mainly applied to the aspect of safety detection when the short-wave feeder line connected with a high-power short-wave transmitter with the transmitting power of more than 50kW and an antenna is overhauled and is used for solving the problems that the prior art cannot detect the high-frequency voltage of short wave 3.2M-26.1MHz and the contact type detection is easy to cause high-frequency discharge.
In order to solve the technical problem, the invention provides a safety detection device for overhauling a high-power short-wave antenna feeder, which comprises: a voltage detector and a feeder ground safety device; wherein the voltage detector includes: the short-wave antenna, the voltage detection circuit and the alarm circuit; the voltage detection circuit receives a high-frequency signal of a feeder line of the antenna to be detected through the short-wave antenna and converts the high-frequency signal into direct-current voltage; the voltage detection circuit is used for detecting whether the voltage value corresponding to the direct current voltage is larger than a preset high-frequency voltage value or not, and sending a trigger voltage to the alarm circuit under the condition that the voltage value corresponding to the direct current voltage is larger than the preset high-frequency voltage value; the alarm circuit is used for alarming according to the trigger voltage; the feeder line grounding safety device is used for carrying the voltage detector.
Further, the alarm circuit is an audible and visual alarm circuit.
Further, the voltage detection circuit is an LM393 integrated circuit.
Further, the voltage detector further includes: and the voltage is 9V.
Further, the feeder grounding safety device includes: the device comprises a handle, an insulating rod, a metal connecting piece, a short circuit rod and a lead clamp; the multiple sections of insulating rods are connected through metal connecting pieces, one end of each connected multiple sections of insulating rods is connected with the handle through the metal connecting pieces, the voltage detector is arranged at the other end of each multiple section of insulating rods, the short-circuit rod is arranged on the insulating rod provided with the voltage detector, and the wire clamps are arranged at two ends of the short-circuit rod respectively.
Furthermore, the short-circuit rod is vertically crossed and connected with the insulating rod provided with the voltage detector, and the vertical cross point is a ground lead joint.
Further, the wire clamp is a double-tongue hook type wire clamp.
Further, the distance between the wire clamps is 400 mm.
Further, the shorting bar includes: the copper bar and the aluminium box of encapsulation copper bar.
Further, the diameter of the copper rod is 8 mm.
The short-wave antenna is adopted to carry out non-contact detection on the antenna feeder line to be overhauled, whether the line is electrified or not can be detected without the need of contacting the antenna feeder line by an overhauler in the detection mode, the overhauler is ensured to overhaul without electrification of the antenna feeder line, the personal safety of the overhauler is ensured, and the problem that high-frequency discharge is easily caused by contact detection because the high-frequency voltage of the short wave of 3.2M-26.1MHz cannot be detected in the prior art is solved.
Drawings
FIG. 1 is a schematic structural diagram of a security detection device in an embodiment of the present invention;
FIG. 2 is a cross-sectional view of a dual-tongue hook-type wire clip in an embodiment of the present invention;
FIG. 3 is a circuit diagram of a voltage detector in an embodiment of the present invention;
fig. 4 is a cross-sectional view of a feed line grounding safety device in an embodiment of the present invention.
Detailed Description
In order to solve the problems in the prior art, the invention provides a safety detection device for overhauling a high-power short-wave antenna feeder, and the invention is further described in detail below with reference to the accompanying drawings and the embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.
The embodiment of the invention provides a safety detection device for overhauling a feeder of a high-power short-wave antenna, which comprises a voltage detector and a feeder grounding safety device (the feeder grounding safety device plays a bearing role and is not fixed in shape, so that the feeder grounding safety device is not shown in figure 1). The voltage detector in fig. 2 includes: a short wave antenna 101 for receiving a high frequency signal of an antenna feed line; a voltage detection circuit 102 for converting a high-frequency signal into a direct-current voltage; a voltage detection circuit 103 for detecting whether the voltage value corresponding to the dc voltage is greater than a preset high-frequency voltage value, and sending a trigger voltage to the alarm circuit when the voltage value corresponding to the dc voltage is greater than the preset high-frequency voltage value; and an alarm circuit 104 for alarming according to the trigger voltage. A feeder ground safety device is used to carry the voltage detector.
This embodiment adopts short wave antenna to carry out non-contact to the antenna feeder who treats the maintenance and detects, and this detecting means does not need maintainer contact antenna feeder, just can realize the electrified function that detects of circuit, ensures that maintainer overhauls under antenna feeder is uncharged, has guaranteed maintainer's personal safety, has solved prior art and can't detect the high-frequency voltage of short wave 3.2M-26.1MHz, and contact detection causes high-frequency discharge's problem easily.
In order to make the alarm circuit capable of alarming more obviously and more suggestive, the alarm circuit of the safety detection device is a sound-light alarm circuit, and can give an alarm through light emitting of a light emitting diode or buzzing of a buzzer or combination of the light emitting and the buzzing, so that the aim of timely and obviously reminding a maintainer is fulfilled.
In the safety inspection equipment of this embodiment, voltage detection circuit is LM393 integrated circuit, includes 8 pins, carries out the input through 2 feet, 3 feet, 5 feet and 6 feet, and 1 foot and 7 feet carry out the output, and 4 feet are the earthing terminal, and 8 feet are the power incoming end. The LM393 integrated circuit is used directly as an element in the voltage detector, so that the volume of the voltage detector can be saved, and the stable integrated circuit can be used for improving the working stability of the voltage detector.
In addition, the voltage detector also comprises a power supply with the voltage of 9V. The power supply can be a dry battery, a storage battery, a small generator or the like. The selection of the power supply can be carried out according to the actual situation.
In the safety inspection equipment of this embodiment, feeder ground connection safety device is used for bearing voltage detector, and when in actual use, maintainer drives voltage detector and carries out the electrified detection whether of being surveyed the circuit through handheld feeder ground connection safety device. Because in the actual operation condition, the erection height of the tested antenna feeder is not fixed, and the height of the maintainer is not fixed, for the convenience of maintenance, the length of each section of insulating rod can be different from that of 300-1000mm, and when the maintainer uses the insulating rod, the selection of the number of the sections and the length of the insulating rod is carried out according to the actual condition. For example: the erection height of a certain tested antenna feeder is 4500mm, and when a maintainer selects the length and the number of the insulating rods, 4 sections of insulating rods with the length of 1000mm can be connected with 1 section of insulating rods with the length of 500mm, or 5 sections of insulating rods with the length of 900mm can be connected. The multiple sections of insulating rods are connected through metal connecting pieces. One end of the connected multi-section insulating rod is connected with the handle through the metal connecting piece, the handle is made of insulating materials, patterns for increasing friction force are arranged on the surface of the handle, and the handle is convenient for maintenance personnel to hold the handle. The other end of the multi-section insulating rod is provided with a voltage detector, the insulating rod provided with the voltage detector is provided with a short-circuit rod, and in order to ensure the reliable short circuit of the feeder line of the antenna to be detected, both ends of the short-circuit rod are respectively provided with a wire clamp. Meanwhile, the insulating rod can be an epoxy resin colored tube or made of glass fiber reinforced plastic materials, so that the insulation of the insulating rod and the personal safety of maintainers are guaranteed.
For convenient operation, the shorting bar is perpendicularly cross-connected with the insulating rod provided with the voltage detector, and the perpendicular cross point is a ground lead. When the short-circuit rod is vertically connected with the insulating rod, the lead clamp of the feeder line grounding safety device is more stable after clamping the lead, and one end of the grounding wire is connected with the grounding wire leading joint, and the other end of the grounding wire is connected with the grounding body, so that residual charges on the tested antenna feeding wire flow to the ground, and the personal safety of maintainers is further ensured.
Furthermore, in order to ensure the stability of the wire clamp for clamping the tested antenna feeder, the wire clamp is a dual-tongue hook type wire clamp, and the cross-sectional view thereof is shown in fig. 2, wherein 201 is a U-shaped body of the dual-tongue hook type wire clamp, and 202 is an elastic metal sheet of the dual-tongue hook type wire clamp. When the double-tongue hook type wire clamp is used, the double-tongue hook type wire clamp is clamped above a tested antenna feeder line from top to bottom, so that the tested antenna feeder line is in contact with the elastic metal sheet 202 on the inner side of the double-tongue hook type wire clamp, the contact area between the tested antenna feeder line and the double-tongue hook type wire clamp is increased, a better short circuit and grounding effect is achieved, and the stability and the wind resistance in the maintenance process are improved. The distance required by the antenna feeder lines during erection is fixed to be 400mm, so that the distance between the wire clamps at two sides of the short-circuit bar is also fixed to be 400mm, and the short circuit between the two tested antenna feeder lines is conveniently realized.
In order to achieve a good short-circuit effect, the shorting bar comprises a copper bar and an aluminum box encapsulating the copper bar, and further, the diameter of the copper bar is 8 mm. In the maintenance process, if high frequency signal appears suddenly, the bar copper can guarantee abundant short circuit, with the aluminium box encapsulation simultaneously, both increased short circuit intensity and device alleviate the counter weight, make things convenient for the maintainer to carry out handheld operation.
In order to facilitate the operation of the safety detection device and simultaneously have strong wind resistance, the total weight of the safety detection device cannot be too heavy or too light, and the total design weight can be between 3 kg and 4 kg.
The voltage detector will be described in detail with reference to the specific circuit configuration of fig. 3.
In fig. 3, the voltage detection circuit of the voltage detector uses an LM393 integrated circuit as a comparator, and uses 5 pins of 1, 2, 3, 4, and 8 of the LM393 integrated circuit, and the alarm circuit is an audible and visual alarm circuit, in which a light emitting diode is used as an optical alarm element, and a buzzer is used as an audible alarm element. Wherein, R1 is the characteristic impedance of the short wave antenna, one end of a capacitor C1 is connected to one end of a resistor R1 and one end of a transformer primary winding, the other end of a capacitor C1 is connected to the other end of a resistor R1 and the other end of a transformer primary winding, the primary winding and the secondary winding are both wound on the iron core, the anode of a diode is connected to one end of the secondary winding, the cathode of a diode is connected to one end of a capacitor C2, one end of a resistor R2 and one end of a self-checking switch S2, the other end of a capacitor C2 is connected to the other end of the secondary winding and one end of a resistor R4, the other end of a resistor R4 is connected to the other end of a resistor R2 and one end of a resistor R3, the other end of a resistor R3 is connected to the other end of a self-checking switch S2 and one end of a resistor R5, the anode of a power supply, the anode of a light emitting diode, one end of a resistor R, One end of a resistor R6, one end of a resistor R8 and a pin 2 of the comparator are connected, the other end of a capacitor C3 is connected with one end of a resistor R4, the other end of a resistor R6 and a pin 4 of the comparator, and is grounded at the same time, the other end of a resistor R7 is connected with the other end of a resistor R8, one end of a resistor R9 and a pin 1 of the comparator at the same time, the other end of a resistor R9 is connected with one end of a resistor R10 and a base of a triode switch, the other end of the resistor R10 is connected with an emitter of the triode switch and a pin 4 of the comparator, and is grounded at the same time, a cathode of a light emitting diode is connected with a collector of the triode switch and a buzzer, a cathode of a power supply is connected with one end of.
Further, in this embodiment, when the antenna feeder to be detected is charged, a short-wave high-frequency signal of 3.2M-26.1MHz is generated, and after receiving the short-wave high-frequency signal, the short-wave antenna is coupled to the detection circuit (i.e., the diode and the capacitor C2) through the resonant circuit (i.e., the capacitor C1 and the end portion of the primary winding of the transformer in fig. 3), converts the short-wave high-frequency signal into a dc voltage, and inputs the dc voltage into the 3 pins of the comparator, wherein the coil ratio of the primary winding end to the secondary winding end of the transformer is 1:10, the characteristic impedance of the short-wave antenna is 75 Ω, the center frequency of the resonant circuit is designed to be 11MHz, the quality factor Q is 0.9, and the value of the capacitor C2 in the detection circuit is 100 uF. The 2-pin input of the comparator is a voltage divided by 9V voltage through a resistor R5 and a resistor R6, wherein the resistance value of the resistor R5 is 1M omega, the resistance value of the resistor R6 is 10K omega, the voltage of the 9V voltage divided and input into the 2-pin is approximately equal to 0V (namely a preset high-frequency voltage value), when the voltage value input by the 3-pin is larger than the preset high-frequency voltage value, the 1-pin outputs trigger voltage outwards, the trigger voltage is a high-level voltage with the value of 9V, and after receiving the trigger voltage, the acousto-optic alarm circuit drives a triode switch by utilizing the trigger voltage to enable a light-emitting diode to give out light for alarm and a buzzer to give out sound for alarm. Alternatively, in order to complete the voltage detector circuit, the resistance values or capacitance values of other elements involved in the circuit may be: the capacitance value of C1 is 200 pF; the capacitance value of C3 is 1000 pF; r2 is a variable resistor with the resistance value of 0-100k omega; the resistance of R3 is 1M omega; the resistance value of R4 is 10K omega; the resistance value of R7 is 1K omega; the resistance value of R8 is 10K omega; the resistance of R9 is 100 omega; the resistance of R10 is 5K Ω.
In order to ensure that whether the tested antenna feeder is electrified or not is accurately detected, the voltage detector is subjected to self-checking before detection. And after the power switch S1 and the self-checking switch S2 are closed, if the audible and visual alarm circuit gives an alarm after the self-checking switch S2 is closed, the voltage detector is proved to have no problem and can carry out the live detection of the tested antenna feeder, and if the audible and visual alarm circuit does not give an alarm, the voltage detector needs to be overhauled to find possible problems, such as power supply electricity exhaustion, element damage in the circuit and the like.
In this embodiment, a cross-sectional view of the feed line grounding safety device is shown in fig. 4. In fig. 4, the feeder ground safety device includes an insulating rod, a shorting bar, a double-tongue hook type wire clamp, a handle, and a metal connector. Wherein, the insulator spindle totally four sections, every section length is 1000mm, the rod footpath is 37mm, connect through metal connecting piece between the insulator spindle, and in multisection insulator spindle one end after connecting, be connected with the handle through metal connecting piece, the length of handle is 300mm, place voltage detector at the other end of multisection insulator spindle, and on the insulator spindle that is provided with voltage detector, perpendicular cross connection short-circuit rod, install two tongue couple type wire clamps respectively at short-circuit rod both ends, and the distance between two tongue couple type wire clamps is 400 mm. Junction of insulating rod and short-circuit rodThe grounding lead is a grounding lead joint, one end of the grounding wire is connected with the grounding lead joint, and the other end of the grounding wire is connected with the grounding body, so that the grounding of the feeder line of the antenna to be tested is realized, and the safety of maintenance personnel is ensured. Furthermore, the short wave antenna and the light emitting diode of the voltage detector are placed at obviously visible positions so as to ensure signal receiving and timely alarming. The grounding wire used for grounding is formed by twisting a plurality of strands of annealed copper wires, and the cross section of the grounding wire is 200mm2And has good conductivity.
Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, and the scope of the invention should not be limited to the embodiments described above.
Claims (10)
1. The utility model provides an overhaul high-power short wave antenna feeder's safety inspection equipment which characterized in that, treats the antenna feeder who overhauls and carries out non-contact detection, includes: a voltage detector and a feeder ground safety device; wherein the content of the first and second substances,
the voltage detector includes: the short-wave antenna, the voltage detection circuit and the alarm circuit;
the short-wave antenna is used for receiving a high-frequency signal of an antenna feeder line;
the voltage detection circuit receives a high-frequency signal of a feeder line of the antenna to be detected through the short-wave antenna and converts the high-frequency signal into direct-current voltage;
the voltage detection circuit is used for detecting whether the voltage value corresponding to the direct current voltage is larger than a preset high-frequency voltage value or not, and sending a trigger voltage to the alarm circuit under the condition that the voltage value corresponding to the direct current voltage is larger than the preset high-frequency voltage value;
the alarm circuit is used for alarming according to the trigger voltage;
the feeder line grounding safety device is used for carrying the voltage detector.
2. The security detection device of claim 1, wherein the alarm circuit is an audible and visual alarm circuit.
3. The security detection device of claim 1, wherein the voltage detection circuit is an LM393 integrated circuit.
4. The security detection device of claim 1, wherein the voltage detector further comprises: and the voltage is 9V.
5. The safety detection device of any one of claims 1 to 4, wherein the feeder ground safety means comprises: the device comprises a handle, an insulating rod, a metal connecting piece, a short circuit rod and a lead clamp;
the multiple sections of insulating rods are connected through metal connecting pieces, one end of each connected multiple sections of insulating rods is connected with the handle through the metal connecting pieces, the voltage detector is arranged at the other end of each multiple section of insulating rods, the short-circuit rod is arranged on the insulating rod provided with the voltage detector, and the wire clamps are arranged at two ends of the short-circuit rod respectively.
6. The safety detecting device according to claim 5, wherein the shorting bar is perpendicularly cross-connected to the insulating rod provided with the voltage detector, and the perpendicular cross point is a ground lead.
7. The security apparatus of claim 5, wherein the wire clamp is a double-tongue hook-type wire clamp.
8. The security apparatus of claim 5, wherein the distance between the wire guides is 400 mm.
9. The security detection apparatus of claim 5, wherein the shorting bar comprises: the copper bar and the aluminium box of encapsulation copper bar.
10. The security inspection device of claim 9, wherein the copper rod is 8mm in diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710572460.5A CN107356803B (en) | 2017-07-14 | 2017-07-14 | Safety detection equipment for overhauling high-power short-wave antenna feeder line |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710572460.5A CN107356803B (en) | 2017-07-14 | 2017-07-14 | Safety detection equipment for overhauling high-power short-wave antenna feeder line |
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| CN107356803A CN107356803A (en) | 2017-11-17 |
| CN107356803B true CN107356803B (en) | 2020-12-29 |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016195660A1 (en) * | 2015-06-02 | 2016-12-08 | Honeywell International Inc. | Mobility platform based non-contact voltage detector |
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| DE3801952C2 (en) * | 1988-01-23 | 2000-05-11 | Mannesmann Vdo Ag | Electronic processing unit for analog signals with a monitoring device for a reference voltage |
| US5578931A (en) * | 1993-10-15 | 1996-11-26 | The Texas A & M University System | ARC spectral analysis system |
| JP4442052B2 (en) * | 2001-05-11 | 2010-03-31 | パナソニック株式会社 | Adaptive high-frequency filter, adaptive high-frequency antenna duplexer, and radio apparatus using the same |
| CN100568785C (en) * | 2004-08-31 | 2009-12-09 | 中兴通讯股份有限公司 | A kind of method and apparatus that detects antenna and feeder line connection status |
| CN202631601U (en) * | 2012-06-20 | 2012-12-26 | 孟村回族自治县电力局 | High frequency detection electricity larceny prevention device |
| CN202817691U (en) * | 2012-10-12 | 2013-03-20 | 武安市供电公司 | High-frequency electricity larceny prevention alarm protector |
| CN203104422U (en) * | 2012-12-31 | 2013-07-31 | 熊猫电子集团有限公司 | A short-wave receiving antenna adapter connected by a single radio frequency cable |
| JP6360657B2 (en) * | 2013-03-19 | 2018-07-18 | 株式会社ダイヘン | Non-contact power transmission method and non-contact power transmission system |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016195660A1 (en) * | 2015-06-02 | 2016-12-08 | Honeywell International Inc. | Mobility platform based non-contact voltage detector |
Non-Patent Citations (1)
| Title |
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| 雷击电力调度大楼微波塔时天馈线过电压计算;李建胜 等;《高电压技术》;20051231;第31卷(第12期);第60-62页 * |
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