A wire obstacle light with a protective device

Abstract

The present invention discloses a wire obstruction light with a protection device, including a wire obstruction light body, a current transformer, an LED light driving circuit and a secondary side open circuit protection circuit. The current transformer is arranged in the wire obstruction light body, and the primary side of the current transformer is used to connect to the AC power line; the LED light driving circuit and the secondary side of the current transformer are detachably connected; the secondary side open circuit protection circuit is connected in parallel to the secondary side of the current transformer to protect the secondary side from open circuit. Since a secondary side open circuit protection circuit is added to the secondary side of the current transformer of the wire obstruction light, the secondary side open circuit protection circuit can generate high voltage absorption when the secondary end of the sensor is open. This prevents the high voltage from causing harm to the electronic equipment of the obstruction light or maintenance personnel.

Description

Technical Field

[0001] The invention relates to the technical field of wire obstacle lights, and in particular to a wire obstacle light with a protective device. Background Art

[0002] Visual aids to navigation, such as obstruction lights, are mainly used to indicate obstacles so that aircraft can bypass them and avoid accidents. Existing high-voltage electricity is mainly transmitted through cables that are raised to a high place by overhead cranes. Since the high-voltage cables are in mid-air, they become obstacles at high places. Therefore, it is necessary to install obstruction lights on cables at high places to indicate obstacles on the cables. Obstruction lights installed on high-voltage cables usually obtain power from the high-voltage cables by induction. At that time, since the obstruction lights may require maintenance work such as replacing lamp beads during use, the lamp beads need to be disassembled and replaced. During the removal of the lamp beads, the secondary end of the sensor may be open-circuited, which will cause high voltage. This high voltage electricity will cause great harm to the electronic equipment or maintenance personnel of the obstruction lights, especially maintenance personnel working at high altitudes. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, one object of the present invention is to provide a wire obstacle light with a protective device.

[0004] To achieve the above object, a wire obstacle light with a protective device according to an embodiment of the present invention comprises:

[0005] Wire obstacle light body;

[0006] A current transformer, the current transformer is arranged in the main body of the conductor obstacle light, and the primary side of the current transformer is used to be connected to the AC power line;

[0007] An LED lamp driving circuit, wherein the LED lamp driving circuit is detachably connected to the secondary side of the current transformer;

[0008] A secondary side open circuit protection circuit is connected in parallel to the secondary side of the current transformer to provide open circuit protection for the secondary side.

[0009] Further, according to an embodiment of the present invention, the secondary open circuit protection circuit includes a discharge voltage detection circuit, and the discharge voltage detection circuit includes: a varistor R1, and the varistor R1 is connected in parallel to the secondary side of the current transformer.

[0010] Further, according to an embodiment of the present invention, the discharge voltage detection circuit further includes:

[0011] Resistor R2, the varistor R1 is connected in parallel to the secondary side of the current transformer through the resistor R2;

[0012] A rectifier circuit, wherein the input end of the rectifier circuit is connected to the two ends of the resistor R2 to rectify the divided voltage of the resistor R2 into a direct current output;

[0013] A comparison circuit, the comparison circuit is connected to the output end of the rectifier circuit to compare and output the DC voltage output by the rectifier circuit;

[0014] A thyristor drive circuit, wherein an input end of the thyristor drive circuit is connected to an output end of the comparison circuit;

[0015] The two power supply terminals of the thyristor are respectively connected to the two ends of the secondary side of the current transformer, and the control terminal of the thyristor is connected to the output terminal of the thyristor driving circuit.

[0016] Further, according to an embodiment of the present invention, the rectifier circuit includes:

[0017] Bridge rectifier circuit;

[0018] A voltage stabilizing circuit is arranged at the positive output end of the bridge rectifier circuit to stabilize the output voltage of the bridge rectifier circuit and then output it.

[0019] Further, according to an embodiment of the present invention, the discharge voltage detection circuit further includes a resistor R3, and one end of the resistor R2 is connected to the secondary side of the current transformer through the resistor R3.

[0020] Further, according to an embodiment of the present invention, the voltage stabilizing circuit includes:

[0021] A voltage regulator tube, wherein an anode of the voltage regulator tube is connected to the positive output end of the bridge rectifier circuit, and a cathode of the voltage regulator tube is connected to the negative output end of the bridge rectifier circuit;

[0022] A capacitor, one end of which is connected to the anode of the voltage regulator tube, and the other end of which is connected to the cathode of the voltage regulator tube.

[0023] Further, according to an embodiment of the present invention, the comparison circuit includes:

[0024] A resistor R8, one end of which is connected to the output end of the voltage stabilizing circuit;

[0025] A resistor R9, one end of the resistor R9 is connected to the other end of the resistor R8, and the other end of the resistor R9 is connected to the negative output end of the bridge rectifier circuit;

[0026] A three-terminal voltage regulator, wherein the controlled end of the three-terminal voltage regulator is connected to the one end of the resistor R9, the anode of the three-terminal voltage regulator is connected to the negative output end of the bridge rectifier circuit, and the cathode of the three-terminal voltage regulator is connected to the positive output end of the bridge rectifier circuit through the resistor R6.

[0027] Further, according to an embodiment of the present invention, the thyristor driving circuit includes:

[0028] Optocoupler U5, the anode of the light-emitting end of the optocoupler U5 is connected to the positive output end of the bridge rectifier circuit, the cathode of the light-emitting end of the optocoupler U5 is connected to the cathode of the three-terminal voltage regulator tube, the emitter of the transistor end of the optocoupler U5 is connected to the controlled end of the thyristor, and the collector end of the transistor end of the optocoupler U5 is connected to the positive output end of the bridge rectifier circuit.

[0029] Furthermore, according to an embodiment of the present invention, the current transformer, the secondary open circuit protection circuit and the LED lamp driving circuit are detachably connected via a waterproof quick-release connector.

[0030] Furthermore, according to an embodiment of the present invention, the device further comprises a lightning protection module, and the lightning protection module is connected in parallel to the input end of the LED lamp driving circuit.

[0031] The wire obstruction light with a protection device provided in the embodiment of the present invention is arranged in the main body of the wire obstruction light through the current transformer, and the primary side of the current transformer is used to connect to the AC power line; the LED light driving circuit and the secondary side of the current transformer are detachably connected; the secondary side open circuit protection circuit is connected in parallel to the secondary side of the current transformer to protect the secondary side from open circuit. Since a secondary side open circuit protection circuit is added to the secondary side of the current transformer of the wire obstruction light, the secondary side open circuit protection circuit can generate high voltage absorption when the secondary end of the sensor is open. This high voltage electricity is prevented from causing harm to the electronic equipment of the obstruction light or maintenance personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A schematic diagram of the structure of a wire obstacle light with a protective device provided in an embodiment of the present invention;

[0033] Figure 2 A schematic diagram of the structure of a current transformer, an LED lamp driving circuit and a secondary side open circuit protection circuit provided in an embodiment of the present invention;

[0034] Figure 3 A schematic diagram of the secondary open circuit protection circuit structure provided by an embodiment of the present invention.

[0035] Reference numerals:

[0036] AC power line 10;

[0037] Wire obstacle light body 20;

[0038] Current transformer 30;

[0039] Secondary side open circuit protection circuit 40;

[0040] Rectification circuit 401;

[0041] SCR driving circuit 402;

[0042] Comparison circuit 403;

[0043] LED lamp driving circuit 50;

[0044] Waterproof quick release connector 60.

[0045] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings in conjunction with the embodiments. DETAILED DESCRIPTION

[0046] In order to make those skilled in the art better understand the scheme of the present invention, the technical scheme in the embodiment of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the present invention. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0047] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0048] See also Figures 1 to 3 The embodiment of the present invention provides a wire obstruction light with a protective device, comprising: a wire obstruction light body 20, a current transformer 30, an LED lamp driving circuit 50 and a secondary open circuit protection circuit 40, wherein the current transformer 30 is arranged in the wire obstruction light body 20, as shown in FIG. Figure 1 As shown in the figure, when the wire obstacle light is in use, the wire obstacle light body 20 is installed on the high-voltage line; the primary side of the current transformer 30 is used to connect to the AC power line 10; through the mutual inductance of the current transformer 30, the high voltage on the AC power line 10 can be output through the mutual inductance. Figure 2As shown in , by setting the primary side of the current transformer 30 on the high-voltage power line, the secondary side voltage of the current transformer 30 is output after mutual induction, so that the power mutual induction output can be obtained.

[0049] The LED lamp driving circuit 50 is detachably connected to the secondary side of the current transformer 30; Figure 2 As shown in , the LED lamp driving circuit 50 and the secondary side of the current transformer 30 can be connected through a waterproof quick-release connector 60. Since the LED lamp driving circuit 50 is used to drive the obstruction light to emit light, the LED lamp driving circuit 50 and the LED load can be replaced by connecting with the waterproof quick-release connector 60, thereby facilitating the future maintenance of the LED lamp driving circuit 50 and the LED load.

[0050] The secondary side open circuit protection circuit 40 is connected in parallel to the secondary side of the current transformer 30 to protect the secondary side from open circuit. Since the secondary side mutual inductance coil of the current transformer 30 has a certain amount of current when the current transformer 30 is powered by mutual inductance, when the maintenance personnel remove and replace the LED lamp driving circuit 50 and the LED load through the waterproof quick-release connector 60, the secondary side of the current transformer 30 is in an open circuit state due to the absence of the LED lamp driving circuit 50 and the LED load. In this way, the secondary side mutual inductance coil of the current transformer 30 generates high voltage due to the sudden change in voltage, and this high voltage may cause harm to the electronic equipment of the obstruction light or the maintenance personnel. By connecting the secondary side open circuit protection circuit 40 in parallel to the secondary side of the current transformer 30, after the LED lamp driving circuit 50 and the LED load are separated from the current transformer 30 and an open circuit is generated, the secondary side open circuit protection circuit 40 connected in parallel to the secondary side of the current transformer 30 can absorb the high voltage electricity generated by the secondary side mutual inductance coil of the current transformer 30 after the open circuit. This avoids high voltage that could be harmful to the light electronics or maintenance personnel.

[0051] The wire obstruction light with a protective device provided in the embodiment of the present invention is arranged in the wire obstruction light body 20 through the current transformer 30, and the primary side of the current transformer 30 is used to connect to the AC power line 10; the LED lamp driving circuit 50 and the secondary side of the current transformer 30 are detachably connected; the secondary side open circuit protection circuit 40 is connected in parallel to the secondary side of the current transformer 30 to provide open circuit protection for the secondary side. Since the secondary side open circuit protection circuit 40 is added to the secondary side of the current transformer 30 of the wire obstruction light, the secondary side open circuit protection circuit 40 can generate high voltage absorption when the secondary end of the inductor is open. This high voltage electricity is prevented from causing harm to the electronic equipment or maintenance personnel of the obstruction light.

[0052] See also Figure 3 The secondary side open circuit protection circuit 40 includes a discharge voltage detection circuit, and the discharge voltage detection circuit includes: a varistor R1, and the varistor R1 is connected in parallel to the secondary side of the current transformer 30. Figure 3As shown in , the varistor R1 is connected in parallel to the secondary side of the current transformer 30. Since the varistor R1 is a resistor device with nonlinear volt-ampere characteristics, voltage clamping is performed when the circuit is subjected to overvoltage. When the secondary side mutual inductance coil of the current transformer 30 is not open-circuited, the two ends of the varistor R1 are in a low voltage state, and the varistor R1 is in a cut-off state; when the secondary side mutual inductance coil of the current transformer 30 is open-circuited, the two ends of the varistor R1 are in a high voltage state, and the varistor R1 is in a conducting state, so that the high voltage generated by the secondary side mutual inductance coil of the current transformer 30 can be absorbed.

[0053] See also Figure 3 The discharge voltage detection circuit also includes: a resistor R2, a rectifier circuit 401, a comparison circuit 403, a thyristor drive circuit 402 and a thyristor, and the varistor R1 is connected in parallel to the secondary side of the current transformer 30 through the resistor R2; Figure 3 As shown in FIG. 1 , the varistor R1 and the resistor R2 are connected in series and then connected in parallel to the secondary side of the current transformer 30. The resistor R2 can absorb the high voltage generated by the open circuit of the secondary side of the current transformer 30, and on the other hand, can generate a certain conduction voltage.

[0054] The input end of the rectifier circuit 401 is connected to both ends of the resistor R2 to rectify the divided voltage of the resistor R2 into a direct current output; Figure 3 As shown in , the rectifier circuit 401 may include a bridge rectifier circuit 401 and a voltage stabilizing circuit, and the voltage stabilizing circuit is arranged at the positive output end of the bridge rectifier circuit 401 to stabilize the output voltage of the bridge rectifier circuit 401 and then output it. Since the voltage across the resistor R2 can be an AC voltage, the AC voltage can be rectified into a DC pulsating voltage and output through the bridge rectifier circuit 401. Then, the pulsating DC voltage can be rectified into a stabilized DC power through the voltage stabilizing circuit. In one embodiment of the invention, the voltage stabilizing circuit includes a voltage stabilizing tube D7, the anode of the voltage stabilizing tube D7 is connected to the positive output end of the bridge rectifier circuit 401, and the cathode of the voltage stabilizing tube D7 is connected to the negative output end of the bridge rectifier circuit 401. The output voltage of the bridge rectifier circuit 401 can be stabilized and then output through the voltage stabilizing tube. In another embodiment of the present invention, the voltage stabilizing circuit further includes a filter capacitor C5, one end of the filter capacitor C5 is connected to the positive output end of the bridge rectifier circuit 401, and the other end of the filter capacitor C5 is connected to the negative output end of the bridge rectifier circuit 401. The capacitor C5 can filter out the clutter at the output end of the bridge rectifier circuit 401 to ensure the stability of the output power supply.

[0055] The comparison circuit 403 is connected to the output end of the rectifier circuit 401 to compare the DC voltage output by the rectifier circuit 401 and then output it; Figure 3As shown in , the comparison circuit 403 includes: a resistor R8, a resistor R9 and a three-terminal voltage regulator, one end of the resistor R8 is connected to the output end of the voltage regulator circuit; one end of the resistor R9 is connected to the other end of the resistor R8, and the other end of the resistor R9 is connected to the negative output end of the bridge rectifier circuit 401; the voltage VDD output by the rectifier circuit 401 can be divided by the resistors R8 and R9.

[0056] The controlled end of the three-terminal voltage regulator is connected to one end of the resistor R9, the anode of the three-terminal voltage regulator is connected to the negative output end of the bridge rectifier circuit 401, and the cathode of the three-terminal voltage regulator is connected to the positive output end of the bridge rectifier circuit 401 through the resistor R6. Figure 3 As shown in FIG, after the resistor R9 and the resistor R8 divide the voltage, they are connected to the controlled end of the three-terminal voltage regulator U6 to provide a comparison voltage for the three-terminal voltage regulator. When the comparison voltage is higher than the reference voltage of the voltage regulator U6, the three-terminal voltage regulator U6 is turned on.

[0057] The input end of the thyristor drive circuit 402 is connected to the output end of the comparison circuit 403; Figure 3 As shown in , the thyristor drive circuit 402 includes: an optical coupler U5, the anode of the light-emitting end of the optical coupler U5 is connected to the positive output end of the bridge rectifier circuit 401, the cathode of the light-emitting end of the optical coupler U5 is connected to the cathode of the three-terminal voltage regulator, the emitter of the transistor end of the optical coupler U5 is connected to the controlled end of the thyristor, and the collector end of the transistor end of the optical coupler U5 is connected to the positive output end of the bridge rectifier circuit 401. Figure 3 As shown in , by connecting the optocoupler U5 to the cathode of the three-terminal voltage regulator U6 (comparison circuit 403), when the three-terminal voltage regulator U6 is turned on due to the high voltage, the light-emitting diode on the light-emitting end of the optocoupler U5 also emits light, so that the photosensitive transistor end of the optocoupler U5 is turned on.

[0058] The two power supply terminals of the thyristor VT are respectively connected to the two ends of the secondary side of the current transformer 30, and the control terminal of the thyristor is connected to the output terminal of the thyristor driving circuit 402. Figure 3 As shown in , since the control end of the thyristor is connected to the output end of the thyristor drive circuit 402. In an embodiment of the present invention, the output end of the thyristor drive circuit 402 may be the emitter end of the transistor end of the optocoupler U5. When the transistor end of the optocoupler U5 is turned on, a turn-on control signal appears at the controlled end of the thyristor. At this time, the thyristor VT is turned on. By turning on the thyristor, the high voltage electricity on the secondary side of the current transformer 30 can be further quickly released. In this way, combined with the varistor R1, dual-path high voltage electricity release can be achieved. Furthermore, this high voltage electricity will cause harm to the electronic equipment or maintenance personnel of the obstruction light. It should be noted that the thyristor can adopt a bidirectional thyristor, and the optocoupler U5 can adopt a high-speed optocoupler to further increase the conduction speed of the thyristor VT when the high voltage is turned on.

[0059] See also Figure 3 The wire obstacle light with protective device also includes a resistor R3, and one end of the resistor R2 is connected to the secondary side of the current transformer 30 through the resistor R3. The resistor R3 and the resistor R2 are divided into voltages, and in actual applications, the resistance values ​​of the resistors R2 and R3 can be adjusted accordingly. In this way, the voltage on the resistor R2 can be prevented from being too high, and the output voltage after rectification can be prevented from being too high.

[0060] See also Figure 2 The current transformer 30, the secondary open circuit protection circuit 40 and the LED lamp driving circuit 50 are detachably connected via a waterproof quick-release connector 60. Figure 2 As shown in the figure, the current transformer 30 and the LED lamp driving circuit 50 are detachably connected through the waterproof quick-release connector 60. In this way, the LED lamp driving circuit 50 can be easily connected to the LED lamp bead on the LED lamp driving circuit 50 for maintenance and replacement. Since the LED lamp bead on the LED lamp driving circuit 50 is a wear-prone device, it may fail after a certain period of use, or the lamp bead may experience light decay. The detachable connection through the waterproof quick-release connector 60 facilitates maintenance work after a failure.

[0061] See also Figure 2 , and further includes a lightning protection module, which is connected in parallel to the input end of the LED lamp driving circuit 50. As shown in the figure, by connecting the lightning protection module in parallel to the input end of the LED lamp driving circuit 50, the LED lamp driving circuit 50 can be protected from lightning during use. Since the obstacle light is located at a high position of the high-voltage line, it is easy to become a target of lightning strike, and the lightning protection module can prevent the LED lamp driving circuit 50 from being damaged by lightning strikes.

[0062] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0063] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A wire obstacle light with a protective device, characterized in that: include: Wire obstacle light body; A current transformer, the current transformer is arranged in the main body of the conductor obstacle light, and the primary side of the current transformer is used to be connected to the AC power line; An LED lamp driving circuit, wherein the LED lamp driving circuit is detachably connected to the secondary side of the current transformer; A secondary side open circuit protection circuit, wherein the secondary side open circuit protection circuit is connected in parallel to the secondary side of the current transformer to provide open circuit protection for the secondary side; in, The secondary side open circuit protection circuit includes a discharge voltage detection circuit, and the discharge voltage detection circuit includes: A varistor R1, wherein the varistor R1 is connected in parallel to the secondary side of the current transformer; Resistor R2, the varistor R1 is connected in parallel to the secondary side of the current transformer through the resistor R2; A rectifier circuit, wherein the input end of the rectifier circuit is connected to the two ends of the resistor R2 to rectify the divided voltage of the resistor R2 into a direct current output; A comparison circuit, the comparison circuit is connected to the output end of the rectifier circuit to compare and output the DC voltage output by the rectifier circuit; A thyristor drive circuit, wherein an input end of the thyristor drive circuit is connected to an output end of the comparison circuit; A thyristor, wherein two power supply terminals of the thyristor are respectively connected to two ends of the secondary side of the current transformer, and a control terminal of the thyristor is connected to an output terminal of the thyristor drive circuit; in, The rectifier circuit comprises: Bridge rectifier circuit; A voltage stabilizing circuit, which is arranged at the positive output end of the bridge rectifier circuit to stabilize the output voltage of the bridge rectifier circuit and then output it; in, The comparison circuit comprises: A resistor R8, one end of which is connected to the output end of the voltage stabilizing circuit; A resistor R9, one end of the resistor R9 is connected to the other end of the resistor R8, and the other end of the resistor R9 is connected to the negative output end of the bridge rectifier circuit; A three-terminal voltage regulator, wherein the controlled end of the three-terminal voltage regulator is connected to the one end of the resistor R9, the anode of the three-terminal voltage regulator is connected to the negative output end of the bridge rectifier circuit, and the cathode of the three-terminal voltage regulator is connected to the positive output end of the bridge rectifier circuit through the resistor R6; Wherein, the voltage stabilizing circuit comprises: A voltage regulator tube, wherein an anode of the voltage regulator tube is connected to the positive output end of the bridge rectifier circuit, and a cathode of the voltage regulator tube is connected to the negative output end of the bridge rectifier circuit; A capacitor, one end of which is connected to the anode of the voltage regulator tube, and the other end of which is connected to the cathode of the voltage regulator tube.

2. The wire obstacle light with a protective device according to claim 1, characterized in that: The discharge voltage detection circuit further includes a resistor R3, and one end of the resistor R2 is connected to the secondary side of the current transformer through the resistor R3.

3. The wire obstacle light with a protective device according to claim 1, characterized in that: The thyristor drive circuit comprises: Optocoupler U5, the anode of the light-emitting end of the optocoupler U5 is connected to the positive output end of the bridge rectifier circuit, the cathode of the light-emitting end of the optocoupler U5 is connected to the cathode of the three-terminal voltage regulator tube, the emitter of the transistor end of the optocoupler U5 is connected to the controlled end of the thyristor, and the collector end of the transistor end of the optocoupler U5 is connected to the positive output end of the bridge rectifier circuit.

4. The wire obstacle light with a protective device according to claim 3, characterized in that: The current transformer, the secondary open circuit protection circuit and the LED lamp driving circuit are detachably connected via a waterproof quick-release connector.

5. The wire obstacle light with a protective device according to claim 3, characterized in that: It also includes a lightning protection module, which is connected in parallel to the input end of the LED lamp driving circuit.

Images