CN217721162U - Automatic switching device for high-voltage antenna - Google Patents
Automatic switching device for high-voltage antenna Download PDFInfo
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- CN217721162U CN217721162U CN202121661020.5U CN202121661020U CN217721162U CN 217721162 U CN217721162 U CN 217721162U CN 202121661020 U CN202121661020 U CN 202121661020U CN 217721162 U CN217721162 U CN 217721162U
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Abstract
The utility model provides a high voltage antenna automatic switching device, include: emission signal selection and protection circuit: when the two sets of medium wave navigation equipment share one antenna, a transmitting signal firstly passes through a first group of high-voltage vacuum relays, the normally closed ends of the first group of high-voltage vacuum relays are connected with a lightning ground, a second group of high-voltage vacuum relays have a transmitting signal selection function, and the normally closed ends of the second group of high-voltage vacuum relays are connected with a No. 1 machine by default; the third group of high-voltage vacuum relays has an antenna protection function, and the normally closed ends of the third group of high-voltage vacuum relays are grounded in a lightning-protection manner, so that the third group of high-voltage vacuum relays play a lightning-protection role when not used; the control circuit is used for controlling the first group of high-voltage vacuum relays, the second group of high-voltage vacuum relays and the third group of high-voltage vacuum relays to be closed, and the input ends of control signals of the control circuit are on-off signals of the two sets of medium wave navigation equipment.
Description
Technical Field
The utility model relates to a high-voltage antenna technical field, in particular to high-voltage antenna automatic switching device.
Background
With the development of science and technology, the integration level of medium wave navigation equipment is higher and higher, the remote control capability is diversified, meanwhile, because the medium wave navigation equipment is low in price, some airports adopt a station to be equipped with two sets of medium wave navigation equipment and a set of medium wave navigation antenna, but because an antenna feed system of the medium wave navigation system is a high-voltage part, a common relay cannot complete the remote control switching function, and the medium wave navigation station cannot completely realize the unattended function.
SUMMERY OF THE UTILITY MODEL
The object of the utility model is to solve at least one of the technical defects.
Therefore, the present invention is directed to an automatic switching device for high voltage antenna.
In order to achieve the above object, an embodiment of an aspect of the present invention provides an automatic switching device for high voltage antenna, including:
the transmission signal selection and protection circuit: when two sets of medium wave navigation equipment share one antenna, transmitting signals firstly pass through a first group of high-voltage vacuum relays, the normally closed ends of the first group of high-voltage vacuum relays are connected with a lightning ground, the second group of high-voltage vacuum relays have a transmitting signal selection function, and the normally closed ends of the second group of high-voltage vacuum relays are connected with a No. 1 machine by default; the third group of high-voltage vacuum relays has an antenna protection function, and the normally closed ends of the third group of high-voltage vacuum relays are grounded in a lightning-proof manner, so that the third group of high-voltage vacuum relays play a lightning-proof role of the antenna when not in use;
the control circuit controls the first group of high-voltage vacuum relays, the second group of high-voltage vacuum relays and the third group of high-voltage vacuum relays to be closed, and the control signal input ends of the control circuit are on-off signals of two sets of medium wave navigation equipment, wherein the second group of high-voltage vacuum relays are controlled by the on-off signals of the No. 2 machine; the first group of high-voltage vacuum relays and the third group of high-voltage vacuum relays are controlled by the power-on and power-off signals of No. 1 and No. 2 after being output through an exclusive-OR gate, so that when two sets of medium wave navigation equipment are simultaneously started, one set of equipment is prevented from being burnt due to the fact that an antenna is not connected;
the delay disconnection circuit: the medium wave navigation equipment is self-checked after being started, after the self-check is correct, the transmitter gradually increases the power to a preset value, the high-voltage vacuum relay works and has loading capacity, and the high-voltage vacuum relay is normally used in a starting stage; when the equipment is shut down, the delay disconnection circuit is used for delaying disconnection of the high-voltage vacuum relay when the equipment is shut down or is suddenly powered off, so that the function of protecting the equipment is achieved;
the high-voltage antenna automatic conversion device adopts an epoxy glass cloth plate to fix all devices, the front side of the high-voltage antenna automatic conversion device is a high-voltage device, the back side of the high-voltage antenna automatic conversion device is a low-voltage device, a front side ceramic high-voltage vacuum relay is fixed on an insulating plate through screws, a radio-frequency signal is welded through a copper wire, the position over the copper wire is fixed through an insulating support, and the cross position of the copper wire is isolated by a bakelite rod; and the control circuit on the back side is welded on a printed board and is connected to the control end of each relay through a cable, and the front side and the back side of the printed board are covered by two cover plates.
Further, the control circuit of the reverse side includes: the adapter or the AC-DC module is connected with external 220V alternating current, the printed board is respectively connected with a No. 1 machine control signal and a No. 2 machine control signal, and the printed board is respectively connected with the first delay power-off relay and the second delay power-off relay.
Furthermore, a first group of high-voltage vacuum relays, a second group of high-voltage vacuum relays, a third group of high-voltage vacuum relays, protective equipment corresponds to the first group of high-voltage vacuum relays and the second group of high-voltage vacuum relays, the third group of high-voltage vacuum relays corresponds to the selection of the machines No. 1 and No. 2, a fifth high-voltage vacuum relay is connected with a protective antenna,
further, the adapter adopts an adapter of 220V to 12V.
Furthermore, a normally closed end of the relay and a transmission signal selection and protection circuit are adopted, a core device of the antenna automatic converter is a ceramic high-voltage vacuum relay, the high-voltage vacuum relay is single-pole double-throw, and the arc can be effectively extinguished when a vacuum medium is disconnected under a load; wear-resistant tungsten contacts suitable for frequent load operations; additional aspects and advantages of the present invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a front connection block diagram of an automatic switching device for a high-voltage antenna according to an embodiment of the present invention;
fig. 2 is a reverse connection block diagram of the automatic switching device for high-voltage antenna according to the embodiment of the present invention;
fig. 3 is a schematic block diagram of an automatic switching device for high-voltage antenna according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
The utility model provides a high voltage antenna automatic switching device for switching etc. of medium wave navigation antenna and medium wave navigation equipment and lightning-arrest ground.
As shown in fig. 1, the utility model discloses high-voltage antenna automatic switching device of embodiment includes: the device comprises a transmitting signal selection and protection circuit, a control circuit and a time delay disconnection circuit.
Specifically, the transmission signal selection and protection circuit: when two sets of medium wave navigation equipment share one antenna, a transmitting signal firstly passes through a first group of high-voltage vacuum relays, and an NC (normally closed end) of each relay is connected with a lightning ground, so that the equipment is prevented from being damaged due to the fault of a control circuit or the mistaken start of a user, and the function of protecting the equipment is achieved; the second group of high-voltage vacuum relays have the function of transmitting signals (No. 1 and No. 2 machines) selection, and the NC end is connected with the No. 1 machine by default; the third group of high-voltage vacuum relays has an antenna protection function, and the NC end is connected with a lightning ground, so that the lightning protection function of the antenna is achieved when the vacuum relay is not used.
The control circuit is used for controlling the closing of the first group of high-voltage vacuum relays, the second group of high-voltage vacuum relays and the third group of high-voltage vacuum relays, the control part mainly controls the closing of the three groups of high-voltage vacuum relays, and the input ends of control signals are on-off signals of the two sets of medium wave navigation equipment. Wherein, the second group of high-voltage vacuum relays are controlled by the on-off signal of the No. 2 machine. The first and third groups of high-voltage vacuum relays are controlled by the power-on and power-off signals of No. 1 and No. 2 after being output through the exclusive-OR gate, so that when two sets of medium wave navigation equipment are simultaneously started, one set of equipment is prevented from being burnt due to the fact that the antenna is not connected.
The time-delay disconnection circuit: the medium wave navigation equipment is started and then self-checked, after the self-check is correct, the transmitter (if started) gradually increases the power to a set value, at the moment, the high-voltage vacuum relay works and the relay has certain loading capacity, so the high-voltage vacuum relay can be normally used in the starting stage. When the equipment is shut down, because the capacitance in the equipment is more, certain power output still exists in a short time after power failure, and if the high-voltage vacuum relay stops working at the moment, the equipment can be damaged, so a delay disconnection circuit is required to be added for delaying the disconnection of the high-voltage vacuum relay when the equipment is shut down or power failure suddenly, and the function of protecting the equipment is achieved.
In summary, the high-voltage relay is used for switching the signals transmitted by the two medium-voltage wave-guided navigation devices and sending the selected radio-frequency signals of the equipment to the antenna. The relay is a vacuum medium, can effectively extinguish arc when being disconnected under load, can instantaneously bear the voltage of tens of thousands of volts, can be frequently operated and has long service life. The utility model discloses select a time delay relay for the disconnection when control signal disappears time delay, play protective apparatus's effect, the time delay is adjustable. The utility model discloses a logic circuit, only just switch on the antenna when one of two equipment starts and transmits, the antenna connects to the ground of taking shelter from thunder at ordinary times. Furthermore, the utility model discloses an epoxy glass cloth board is as the fixed plate, openly is the high pressure device, and the reverse side is the low pressure device. The ceramic high-voltage vacuum relay on the front side is fixed on the insulating plate through screws and connected through copper wires, the copper wires are fixed by an insulating support, and the copper wire intersections are isolated by bakelite rods. The reverse control part is welded on a printed board and is connected to the control ends of the relays through cables. Marks are added at the joints of the front surface and the back surface, so that the identification is convenient.
In the embodiment of the utility model, a high-voltage relay is selected, the relay is a vacuum medium, and the arc can be effectively extinguished when the relay is disconnected under load; wear-resistant tungsten contacts suitable for frequent load operations; two optional mounting modes, namely a flange mode and a bolt mode; the bolt type or welding type high-pressure joint has simple wiring. And (3) selecting a delay relay, normally closing the relay, disconnecting the relay when the control signal disappears and delaying for protecting equipment, wherein the delay time is adjustable and is in an adjustable range of 0.1 s-100 h. A control logic circuit is selected to control the closing of three groups of high-voltage vacuum relays, the input ends of control signals are on-off signals of two sets of medium wave navigation equipment, and the second group of high-voltage vacuum relays are controlled by the on-off signals of No. 2 machine. The first group and the third group are controlled by the power-on and power-off signals of No. 1 and No. 2 after being output through an exclusive-OR gate, so that when two sets of medium wave navigation equipment are simultaneously started, one set of equipment is prevented from being burnt due to the fact that the antenna is not connected. The converter fixes all devices by using an epoxy glass cloth plate, wherein the front side is a high-voltage device, and the back side is a low-voltage device. The front ceramic high-voltage vacuum relay is fixed on the insulating plate through screws, a radio-frequency signal is welded through phi 3 copper wires, the position where the copper wires pass through is fixed through an insulating support, and the cross position of the copper wires is isolated through a bakelite rod. The reverse control part is welded on a printed board and is connected to the control ends of the relays through cables. The front and back surfaces are covered by two cover plates, the front surface is marked with an 'antenna automatic converter', and marks are added at the joints of the front and back surfaces.
The following explains the working flow of the automatic switching device for high-voltage antenna of the present invention as follows:
(1) When the machines 1 and 2 are shut down, the first and third groups of relays do not act, the NC ends are grounded, and the equipment and the antenna are protected.
(2) When the No. 1 machine is started and the No. 2 machine is shut down, the first group of relays and the third group of relays act, the second group of relays do not act, and the No. 1 machine transmits signals to the antenna.
(3) When the No. 2 machine is started and the No. 1 machine is shut down, the first, the second and the third groups of relays act, and the No. 2 machine transmits a signal to the antenna.
(4) When the number 1 and the number 2 machines are both started (including the number 1 machine connected with the antenna, the number 2 machine connected with the load or the number 2 machine connected with the antenna, the number 1 machine connected with the load or the number 1 and the number 2 machines connected with the load), the first group of relays do not act, the number 1 and the number 2 machines are both grounded, the antenna tuner is not tuned at the moment, the standing-wave ratio of the equipment alarms, the power output is very small at the moment, and the equipment is protected.
(5) If one of the devices needs to be debugged (connected with a load), the control cable on the device to be debugged can be pulled down, the voltage at the position is automatically changed into low voltage, which represents that the device is not started, and the normal use of the other device is not influenced at the moment.
The high-voltage vacuum relay works and has certain loading capacity, so that the equipment can be normally used in the starting-up stage. When the equipment is shut down, because the capacitance in the equipment is more, certain power output still exists in a short time after power failure, if the high-voltage vacuum relay stops working at the moment, the equipment can be damaged, so a delay disconnection relay is required to be added for delaying the disconnection of the high-voltage vacuum relay when the equipment is shut down or is suddenly powered off, and the function of protecting the equipment is achieved. The delay relay has adjustable delay time within 0.1 s-100 h,
in the aspect of power supply, an external independent power supply is adopted to ensure the stability and reliability of the equipment. An adapter or an AC/DC module (220V to 12V) can be selected for supplying power to the devices in the converter respectively.
In terms of structure, the converter is constructed by mounting the devices in a single epoxy glass cloth (400 x 400) having the layout shown in fig. 1 and 2, with the high voltage devices on the front side and the low voltage devices on the back side. The front ceramic high-voltage vacuum relay is fixed on the insulating plate through screws, a radio-frequency signal is welded through phi 3 copper wires, the position where the copper wires pass through is fixed through an insulating support, and the cross position of the copper wires is isolated through a bakelite rod. The reverse control part is welded on a printed board and is connected to the control ends of the relays through cables. The front and back surfaces are covered by two cover plates, and the front surface is marked with an 'antenna automatic converter'.
Referring to fig. 1 and 2, wherein the input terminal: 2-path medium wave navigation transmitter radio frequency signals, 2-path medium wave navigation transmitter control signals and 1-path commercial power 220V input. Output end: the radio frequency signal output (1 path) is connected with a through wall terminal, and the 1 path is connected with a lightning ground.
The core device of the antenna automatic converter is a ceramic high-voltage vacuum relay, and the relay has the following advantages:
(1) the vacuum medium is disconnected under load, so that arc can be effectively extinguished;
(2) wear-resistant tungsten contacts suitable for frequent load operations;
(3) two optional mounting modes, namely a flange type and a bolt type;
(4) the bolt type or welding type high-pressure joint has simple wiring.
The relay is single-pole double-throw, flange-type installation and welding, the maximum working voltage is 15kv, and the signal output of a 500W transmitter can be met
Referring to fig. 3, 3 sets (4) of high-voltage vacuum relays are selected, 2 paths of emission signals firstly pass through the first set (2) of high-voltage vacuum relays, the NC end of the set of relays is connected with a lightning protection ground, the device damage caused by the fault of a control circuit or the error starting of a user is prevented, the device is protected, the control signal is an output signal of 2 paths of on-off signals passing through an exclusive or gate, the set of relays are conducted only when 1 path of devices in 2 paths of devices are started, the emission signals enter the next relay, and the 2 paths of devices are connected into the lightning protection ground when the devices are started or shut down. The second group (1) of high-voltage vacuum relays have the functions of transmitting signals (1 and 2 machines) and selecting, the NC end is connected with the 1 machine by default, and the control signal is the on-off signal of the 2 machine. The third group (1) of high-voltage vacuum relays have an antenna protection function, an NC end is connected with a lightning ground, the lightning protection function of the antenna is achieved when the high-voltage vacuum relays are not used, the control signal is an output signal of 2 paths of on-off signals after passing through an XOR gate, the group of relays are switched on only when 1 path of equipment in 2 paths of equipment is started, the transmitting signal is sent to the antenna, and the high-voltage vacuum relays are switched in the lightning ground of the antenna when 2 paths of equipment are started or all are shut down.
According to the utility model discloses high voltage antenna automatic switching device chooses for use high voltage relay, through two sets of equipment start signals as control signal simultaneously, controls the switch-on and the disconnection of each relay, realizes the function of automatic connection antenna.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present invention have been shown and described, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that changes, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the principles and spirit of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. An automatic switching device for high-voltage antenna, comprising: a transmission signal selection and protection circuit, a control circuit and a time delay disconnection circuit, wherein,
the transmission signal selection and protection circuit: when two sets of medium wave navigation equipment share one antenna, a transmitting signal firstly passes through a first group of high-voltage vacuum relays, the normally closed ends of the first group of high-voltage vacuum relays are connected with a lightning ground, a second group of high-voltage vacuum relays have a transmitting signal selection function, and the normally closed ends of the second group of high-voltage vacuum relays are connected with a No. 1 machine by default; the third group of high-voltage vacuum relays has an antenna protection function, and the normally closed ends of the third group of high-voltage vacuum relays are grounded in a lightning-proof manner, so that the third group of high-voltage vacuum relays play a lightning-proof role of the antenna when not in use;
the control circuit controls the first group of high-voltage vacuum relays, the second group of high-voltage vacuum relays and the third group of high-voltage vacuum relays to be closed, and the control signal input ends of the control circuit are on-off signals of two sets of medium wave navigation equipment, wherein the second group of high-voltage vacuum relays are controlled by the on-off signals of the No. 2 machine; the first group of high-voltage vacuum relays and the third group of high-voltage vacuum relays are controlled by the power-on and power-off signals of No. 1 and No. 2 after being output through an exclusive-OR gate, so that when two sets of medium wave navigation equipment are simultaneously started, one set of equipment is prevented from being burnt due to the fact that an antenna is not connected;
the delay disconnection circuit: the method comprises the steps that self-checking is carried out after the medium wave navigation equipment is started, after the self-checking is correct, the power of a transmitter is gradually increased to a preset value, a high-voltage vacuum relay works, the relay has loading capacity, and the high-voltage vacuum relay is normally used in a starting stage; when the equipment is shut down, the delay disconnection circuit is used for delaying disconnection of the high-voltage vacuum relay when the equipment is shut down or is suddenly powered off, so that the function of protecting the equipment is achieved;
the high-voltage antenna automatic conversion device adopts an epoxy glass cloth plate to fix all devices, the front side of the high-voltage antenna automatic conversion device is a high-voltage device, the back side of the high-voltage antenna automatic conversion device is a low-voltage device, a front side ceramic high-voltage vacuum relay is fixed on an insulating plate through screws, a radio-frequency signal is welded through a copper wire, the position over the copper wire is fixed through an insulating support, and the cross position of the copper wire is isolated by a bakelite rod; the control circuit of the reverse side is welded on a printed board and is connected to the control end of each relay through a cable, wherein the two sides of the reverse side are covered by two cover plates.
2. The automatic switching device for high-voltage antenna according to claim 1, wherein the control circuit of the reverse side comprises: the adapter or the AC-DC module is connected with external 220V alternating current, the printed board is respectively connected with a No. 1 machine control signal and a No. 2 machine control signal, and the printed board is respectively connected with the first delay power-off relay and the second delay power-off relay.
3. The automatic switching device of claim 1, wherein the protection device comprises a first group of high-voltage vacuum relays, a second group of high-voltage vacuum relays, a third group of high-voltage vacuum relays, the protection device corresponds to the first group of high-voltage vacuum relays and the second group of high-voltage vacuum relays, the third group of high-voltage vacuum relays corresponds to the selection of the No. 1 and the No. 2 machines, and the fifth high-voltage vacuum relay is connected with the protection antenna.
4. The automatic switching device for high-voltage antenna according to claim 2, wherein the adapter is an adapter of 220V to 12V.
5. The automatic switching device for high-voltage antenna according to claim 1, wherein the normally closed terminal of the relay and the transmission signal selection and protection circuit, the core device of the automatic antenna switching device is a ceramic high-voltage vacuum relay, the high-voltage vacuum relay is a single-pole double-throw, and for vacuum medium, the arc can be effectively extinguished when the relay is disconnected under load; wear-resistant tungsten contacts suitable for frequent load operations; the method adopts two mounting modes of a flange type and a bolt type, namely a bolt type or a welding type high-pressure joint.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121661020.5U CN217721162U (en) | 2021-07-21 | 2021-07-21 | Automatic switching device for high-voltage antenna |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121661020.5U CN217721162U (en) | 2021-07-21 | 2021-07-21 | Automatic switching device for high-voltage antenna |
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| CN217721162U true CN217721162U (en) | 2022-11-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113489498A (en) * | 2021-07-21 | 2021-10-08 | 天津七六四通信导航技术有限公司 | Automatic switching system of high-voltage antenna |
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- 2021-07-21 CN CN202121661020.5U patent/CN217721162U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113489498A (en) * | 2021-07-21 | 2021-10-08 | 天津七六四通信导航技术有限公司 | Automatic switching system of high-voltage antenna |
| CN113489498B (en) * | 2021-07-21 | 2024-05-28 | 天津七六四通信导航技术有限公司 | Automatic switching system of high-voltage antenna |
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