CN210514512U - Overhead line electricity testing device - Google Patents

Abstract

The utility model relates to an overhead line tests electric installation, including testing electric module, it includes the coil to test electric module, common mode inductance, the voltage stabilizing unit, rectifier unit and first indicating unit, the first end of coil and the first input electric connection of common mode inductance, the second end of coil and the second input electric connection of common mode inductance, the first output of common mode inductance and rectifier unit's first input electric connection, common mode inductance's second output and rectifier unit's second input electric connection, rectifier unit's output and first indicating unit electric connection, the first output of common mode inductance and second output still with voltage stabilizing unit electric connection. Above-mentioned electric installation is tested to overhead line senses the overhead line current in the secondary circuit, can accurately judge whether the overhead line has the electric current to flow, need not external power supply, avoids causing the insulation fault of overhead line and secondary circuit, and is provided with common mode inductance and voltage stabilizing unit, improves the detection security of device, avoids causing personal and equipment injury.

Description

Overhead line electricity testing device

Technical Field

The utility model relates to a power equipment technical field especially relates to overhead line tests electric installation.

Background

Generally, when a power distribution network is overhauled, in order to improve power supply reliability and reduce the number of users in power failure, power supply needs to be converted in principle. For overhead lines, many feeders have on-column switches as tie switches. When the maintenance operation is finished and the original power supply mode is recovered, the loop disconnection between the feeders is generally carried out on the interconnected column switches. When the switch is operated on site, the switch is disconnected, and then the knife switches on the two sides of the switch are pulled. However, after the switch is disconnected, whether the disconnecting link can be pulled open or not can not be judged through electricity inspection (both ends of the disconnecting link are electrified under the working condition), whether the switch is disconnected or not can only be judged through the state indication pointer of the column switch, and then the disconnecting link is pulled open. However, the indication of the opening and closing state of the pole-mounted switch depends on internal mechanical transmission, and the indication of aging, corrosion, looseness or unclear indication caused by various reasons can cause misjudgment of the switch state, for example, there is a fault in the switch, the indication is in the opening state after opening operation, but the switch does not actually operate, or the contacts are not sufficiently separated after operation, and the switch is still in the conducting state substantially. When the knife switch is operated, the accident of pulling the knife switch with load can be caused, electric arc is caused, and great potential safety hazards are caused to people and equipment. The knife switch can not be operated with load current, and the current electroscope is a voltage type electroscope, and can only detect whether voltage exists on the overhead line, and can not sense whether current exists, and can not meet the electricity testing requirements of the occasions.

SUMMERY OF THE UTILITY MODEL

Therefore, there is a need for an overhead line electricity testing device capable of effectively monitoring whether a line has current or not and having high safety.

The utility model provides an overhead line tests electric installation, is including testing electric module, test electric module and include coil, common mode inductance, voltage stabilizing unit, rectifier unit and first indicating unit, the first end of coil with the first input electric connection of common mode inductance, the second end of coil with the second input electric connection of common mode inductance, the first output of common mode inductance with the first input electric connection of rectifier unit, the second output of common mode inductance with the second input electric connection of rectifier unit, the output of rectifier unit with first indicating unit electric connection, the first output of common mode inductance and second output still with voltage stabilizing unit electric connection.

In one embodiment, the rectifying unit is a bridge rectifying unit.

In one embodiment, the first indication unit includes at least one light emitting diode, an anode of the light emitting diode is electrically connected to an anode output terminal of the bridge rectification unit, and a cathode of the light emitting diode is electrically connected to a cathode output terminal of the bridge rectification unit.

In one embodiment, the light-emitting diode detection device further comprises a detection module, the detection module is electrically connected with the electricity detection module, the detection module comprises a direct current power supply and a first bipolar switch, a first end of the first bipolar switch is electrically connected with a positive electrode of the direct current power supply, a second end of the first bipolar switch is used for being electrically connected with a positive electrode of the light-emitting diode, a third end of the first bipolar switch is electrically connected with a negative electrode of the direct current power supply, and a fourth end of the first bipolar switch is used for being electrically connected with a negative electrode of the light-emitting diode.

In one embodiment, the inspection module further includes a second bipolar switch and a second indication unit, a first end of the second bipolar switch is electrically connected to the cathode of the light emitting diode, a second end of the second bipolar switch is electrically connected to the anode of the dc power source, a third end of the second bipolar switch is electrically connected to the first end of the second indication unit, and a fourth end of the second bipolar switch is electrically connected to the cathode of the dc power source; the second end of the second indicating unit is electrically connected with the anode of the light emitting diode.

In one embodiment, the voltage regulator unit includes a bidirectional voltage regulator diode, a first terminal of the bidirectional voltage regulator diode is electrically connected to the first output terminal of the common mode inductor, and a second terminal of the bidirectional voltage regulator diode is electrically connected to the second output terminal of the common mode inductor.

In one embodiment, the electroscopic module further includes an overvoltage protection unit, the first output terminal and the second output terminal of the common mode inductor are further electrically connected to the overvoltage protection unit, the overvoltage protection unit includes a first bi-directional transient suppression diode and a second bi-directional transient suppression diode, a first end of the first bi-directional transient suppression diode is electrically connected to the first output terminal of the common mode inductor, a first end of the second bi-directional transient suppression diode is electrically connected to the second output terminal of the common mode inductor, a second end of the first bi-directional transient suppression diode is electrically connected to the second end of the second bi-directional transient suppression diode, and the second end of the first bi-directional transient suppression diode is used for grounding.

In one embodiment, the overvoltage protection unit further includes an arrester, a first end of the arrester is electrically connected to the first output end of the common mode inductor, a second end of the arrester is electrically connected to the second output end of the common mode inductor, and the arrester has a ground terminal for grounding.

In one embodiment, the electricity verification module further includes an anti-surge unit, the first output end and the second output end of the common mode inductor are further electrically connected to the anti-surge unit, the anti-surge unit includes a first capacitor and a second capacitor, the first end of the first capacitor is electrically connected to the first output end of the common mode inductor, the first end of the second capacitor is electrically connected to the second output end of the common mode inductor, the second end of the first capacitor is electrically connected to the second end of the second capacitor, and the second end of the first capacitor is used for grounding.

In one embodiment, the surge protection unit further includes a first thermistor and a second thermistor, a first end of the first thermistor is electrically connected to a first end of the first capacitor, a second end of the first thermistor is electrically connected to a first input end of the rectifying unit, a first end of the second thermistor is electrically connected to a first end of the second capacitor, and a second end of the second thermistor is electrically connected to a second input end of the rectifying unit.

Above-mentioned overhead line tests electric installation test electric module includes the coil, common mode inductance, voltage stabilizing unit, rectifier unit and indicating unit, the coil is used for the cover to establish at overhead line, when overhead line has the current to flow, based on the electromagnetic induction principle, the coil can produce the electromotive force, the electromotive force is the alternating current, common mode inductance is used for filtering the alternating current, voltage stabilizing unit has the steady voltage effect, a module is tested in the protection, the alternating current converts the direct current into through rectifier unit, the direct current is provided the power for indicating unit and is carried out work, send first indicating signal, then it has the electric current to show the circuit of monitoring. Like this, above-mentioned overhead line tests electric installation and passes through the electromagnetic induction principle and senses overhead line current in the secondary circuit to whether accurate judgement overhead line has the electric current to flow, need not external power supply, can avoid causing the insulation fault of overhead line and secondary circuit, and be provided with common mode inductance and voltage stabilizing unit, further improve overhead line and test electric installation's detection security, can avoid causing the personal and equipment injury.

Drawings

Fig. 1 is a block diagram of an overhead line electricity testing apparatus according to an embodiment;

fig. 2 is a block diagram of a structure of an electricity testing module of the overhead wire electricity testing apparatus according to the embodiment;

FIG. 3 is a schematic circuit diagram of an overhead wire electroscope apparatus according to an embodiment;

FIG. 4a is a schematic circuit diagram of a testing module detecting and testing module of the overhead wire testing device shown in FIG. 3;

FIG. 4b is a schematic diagram of another electrical schematic of the inspection module detection and verification module of the overhead wire electrical verification apparatus shown in FIG. 3;

fig. 5 is a schematic perspective view of an overhead line electricity inspection device according to an embodiment;

FIG. 6 is an enlarged partial schematic view of the overhead line electroscope apparatus shown in FIG. 5 at location A;

fig. 7 is a schematic perspective view of a housing of an overhead line electroscope apparatus according to an embodiment;

fig. 8 is an exploded perspective view of the housing and the lamp panel of the overhead wire electricity inspection device according to the embodiment;

fig. 9 is a schematic perspective view of a bracket of an overhead wire electroscope apparatus according to an embodiment.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The utility model relates to an overhead line tests electric installation, including testing electric module, it includes coil, common mode inductance, voltage stabilizing unit, rectifier unit and first indicating unit to test electric module, the first end of coil with common mode inductance's first input electric connection, the second end of coil with common mode inductance's second input electric connection, common mode inductance's first output with rectifier unit's first input electric connection, common mode inductance's second output with rectifier unit's second input electric connection, rectifier unit's output with first indicating unit electric connection, common mode inductance first output and second output still with voltage stabilizing unit electric connection.

In an embodiment, referring to fig. 2, an overhead line electricity testing apparatus 10 includes an electricity testing module 100, where the electricity testing module 100 includes a coil 110, a common mode inductor 120, a voltage stabilizing unit 150, a rectifying unit 130, and a first indicating unit 140, a first end of the coil 110 is electrically connected to a first input end of the common mode inductor 120, a second end of the coil 110 is electrically connected to a second input end of the common mode inductor 120, a first output end of the common mode inductor 120 is electrically connected to a first input end of the rectifying unit 130, a second output end of the common mode inductor 120 is electrically connected to a second input end of the rectifying unit 130, an output end of the rectifying unit 130 is electrically connected to the first indicating unit 140, and a first output end and a second output end of the common mode inductor 120 are further electrically connected to the voltage stabilizing unit 150. It should be noted that fig. 2 is a structural block diagram of the electroscopic module, and does not relate to the specific connection relationship of the above elements or units, and the specific connection relationship of the above elements or units is represented by the schematic circuit diagram of fig. 3. Above-mentioned overhead line tests electric installation test electric module includes the coil, common mode inductance, voltage stabilizing unit, rectifier unit and indicating unit, the coil is used for the cover to establish at overhead line, when overhead line has the current to flow, based on the electromagnetic induction principle, the coil can produce the electromotive force, the electromotive force is the alternating current, common mode inductance is used for filtering the alternating current, voltage stabilizing unit has the steady voltage effect, a module is tested in the protection, the alternating current converts the direct current into through rectifier unit, the direct current is provided the power for indicating unit and is carried out work, send first indicating signal, then it has the electric current to show the circuit of monitoring. Like this, above-mentioned overhead line tests electric installation and passes through the electromagnetic induction principle and senses overhead line current in the secondary circuit to whether accurate judgement overhead line has the electric current to flow, need not external power supply, can avoid causing the insulation fault of overhead line and secondary circuit, and be provided with common mode inductance and voltage stabilizing unit, further improve overhead line and test electric installation's detection security, can avoid causing the personal and equipment injury.

Specifically, referring to fig. 3, L1 is a coil, L2 is a common mode inductor, a first end of the coil L1 is electrically connected to a first input end of the common mode inductor L2, and a second end of the coil L1 is electrically connected to a second input end of the common mode inductor L2.

In one embodiment, the rectifying unit is a bridge rectifying unit. Specifically, referring to fig. 3, the bridge rectifier unit includes diodes D1, D2, D3, and D4, an anode of the diode D1 is electrically connected to a cathode of the diode D2, an anode of the diode D2 is electrically connected to an anode of the diode D3, a cathode of the diode D3 is electrically connected to an anode of the diode D4, and a cathode of the diode D4 is electrically connected to a cathode of the diode D1, wherein a connection point between the diode D1 and the diode D2 is a first input terminal of the bridge rectifier unit, a connection point between the diode D3 and the diode D4 is a second input terminal of the bridge rectifier unit, and the input terminal of the bridge rectifier unit is connected to the ac power, so that the first input terminal of the bridge rectifier unit is electrically connected to the first output terminal of the common mode inductor L2, and the second input terminal of the bridge rectifier unit is electrically connected to the second output terminal of the common mode inductor L2. The connection point of the diode D1 and the diode D4 is the positive output end of the bridge rectifier unit, the connection point of the diode D2 and the diode D3 is the negative output end of the bridge rectifier unit, and the positive output end and the negative output end of the bridge rectifier unit output direct current.

It should be understood that the first indicating unit may be an indicator light or a buzzer, and the first indicating unit emits a light signal or an acoustic signal to determine whether current flows through the overhead line. It should be noted that the first indication unit includes, but is not limited to, the above-mentioned indicator light and buzzer.

In one embodiment, the first indication unit is an indicator light, and specifically, referring to fig. 3, the first indication unit includes at least one light emitting diode LED, an anode of the light emitting diode LED is electrically connected to an anode output terminal of the bridge rectifier unit, and a cathode of the light emitting diode LED is electrically connected to a cathode output terminal of the bridge rectifier unit. Therefore, when the overhead line has current flowing through, the coil can generate electromotive force based on the electromagnetic induction principle, the electromotive force is alternating current, the alternating current is converted into direct current through the rectifying unit, and the direct current provides power for the light emitting diode LED. And based on the diode one-way conduction principle, the direct current output by the bridge rectifier unit flows from the anode to the cathode of the light emitting diode LED, so that the light emitting diode LED can emit light. That is, when the light emitting diode LED lights up, it indicates that the overhead line has a current flowing through, and the monitored line has a current; when the light emitting diode LED does not emit light, the current does not flow through the overhead line, and the current does not flow through the monitored line.

In order to facilitate the maintainer to judge whether the current exists in the monitoring line, referring to fig. 3, in one embodiment, the first indicating unit includes a plurality of light emitting diodes, anodes of the plurality of light emitting diodes are electrically connected to an anode output terminal of the bridge rectifier unit, and cathodes of the plurality of light emitting diodes are electrically connected to a cathode output terminal of the bridge rectifier unit. That is to say, parallel connection between a plurality of emitting diode, when the output direct current of bridge rectifier unit, a plurality of emitting diode shine simultaneously, and the luminance that produces is higher, and whether the maintainer of being convenient for observes and judges monitoring circuit and has the electric current.

In order to detect whether the electricity testing module works normally, referring to fig. 1, in one embodiment, the overhead wire electricity testing apparatus 10 further includes a testing module 200, the testing module 200 is electrically connected to the electricity testing module 100, and specifically, referring to fig. 3, the testing module 200 includes a dc power supply U and a first bipolar switch S1, a first end of the first bipolar switch S1 is electrically connected to a positive electrode of the dc power supply U, a second end of the first bipolar switch S1 is configured to be electrically connected to a positive electrode of the light emitting diode LED, a third end of the first bipolar switch S1 is electrically connected to a negative electrode of the dc power supply U, and a fourth end of the first bipolar switch S1 is configured to be electrically connected to a negative electrode of the light emitting diode LED. Specifically, the inspection module is used for detecting whether the light emitting diode has a fault.

It should be noted that a bipolar switch (called a bipolar single-gang switch) has two independent switches, and the two switches control the on/off of one branch line through the two switches, and the two switches are also two sets of contacts, and the two sets of contacts have four contacts, that is, a first contact, a second contact, a third contact, and a fourth contact, where the first contact and the second contact are one switch or one set of contacts, and the third contact and the fourth contact are another switch or another set of contacts. Bipolar switches have only two states: both switches are closed at the same time or both switches are open at the same time. When the two switches are closed simultaneously, the circuit is conducted; when both switches are open at the same time, the line is open.

In this embodiment, the first end and the second end of the first bipolar switch are a first set of contacts, the third end and the fourth end are a second set of contacts, when the second end is electrically connected to the anode of the light emitting diode and the fourth end is electrically connected to the cathode of the light emitting diode, that is, the two switches are simultaneously closed, at this time, referring to fig. 4a, the anode of the dc current U is electrically connected to the anode of the light emitting diode LED, the cathode of the dc current U is electrically connected to the cathode of the light emitting diode LED, the dc power supply U and the light emitting diode LED form a loop, and based on the diode one-way conduction principle, the light emitting diode LED can normally work and emits light, which indicates that the light emitting diode is normal; when the LED does not emit light, the LED is indicated to have a fault, and a maintainer can remove the fault of the LED before the electricity testing work is carried out, so that the judgment of the electricity testing is avoided being influenced.

It should be noted that although the dc power U is also electrically connected to the bridge rectifier unit, since the positive electrode of the dc power U is electrically connected to the positive electrode output terminal between D1 and D4 in the bridge rectifier unit, and the negative electrode of the dc power U is electrically connected to the negative electrode output terminal between D2 and D3 in the bridge rectifier unit, that is, a loop is formed between the dc power U, D1 and D2, a loop is also formed between the dc power U, D3 and D4, the current flows from the positive electrode of the dc power U to the negative electrode of D1 or the negative electrode of D4, according to the principle of unidirectional conduction of the diode, current cannot flow to the anode of the D1 through the cathode of the D1, or the current flows to the positive electrode of D4 through the negative electrode of D4, which means that the circuit between the dc power supply U and the bridge rectifier unit is in an off state, and therefore only the circuit formed by the dc power supply U and the light emitting diode LED is on.

It should be understood that the inspection module is used before the electricity testing module performs electricity testing, that is, when the coil of the electricity testing module is not sleeved on the overhead line to detect whether the line has current, the rectifying unit does not output current to supply the light emitting diode to operate. The maintainer is through using the inspection module before checking the electricity, with first double-pole switch closure, and DC power supply U forms the return circuit with emitting diode LED, sends light through observing emitting diode LED, can judge emitting diode LED whether have the trouble.

In order to further detect whether the electroscope module works normally, please refer to fig. 3, in one embodiment, the electroscope module 200 further includes a second bipolar switch S2 and a second indication unit L, a first end of the second bipolar switch S2 is electrically connected to a cathode of the light emitting diode LED, a second end of the second bipolar switch S2 is configured to be electrically connected to an anode of the dc power source U, a third end of the second bipolar switch S2 is electrically connected to a first end of the second indication unit L, and a fourth end of the second bipolar switch S2 is configured to be electrically connected to a cathode of the dc power source U; a first end of the second indicating unit L is electrically connected to a third end of the second bipolar switch S2, and a second end of the second indicating unit L is electrically connected to an anode of the light emitting diode LED. In particular, the inspection module is not only used for detecting whether the light emitting diode has a fault, but also used for detecting whether the rectifying unit in the electricity inspection module has a fault.

In this embodiment, the first end and the second end of the second bipolar switch are a first set of contacts, the third end and the fourth end are a second set of contacts, when the second end is electrically connected to the positive electrode of the dc power source and the fourth end is electrically connected to the negative electrode of the dc power source, that is, the two switches are simultaneously closed, at this time, referring to fig. 4b, the positive electrode of the dc power source U is electrically connected to the negative electrode output terminal between D2 and D3 in the bridge rectifier unit, the negative electrode of the dc power source U is electrically connected to the positive electrode output terminal between D1 and D4 in the bridge rectifier unit, that is, a loop is formed between the dc power source U, D1, D2 and the second indication unit L, or a loop is formed between the dc power source U, D3, D4 and the second indication unit L, the current flows from the positive electrode of the dc power source U to the positive electrode of D2 or the positive electrode of D3, according to the principle of unidirectional diode conduction, the current can flow to the anode of D2 through the anode of D2, flow to the cathode of D1 through the anode of D1, or flow to the cathode of D3 through the anode of D3, and flow to the cathode of D4 through the anode of D4, so that the current can flow through the second indicating unit L, and the second indicating unit L can work normally. That is to say, when the second bipolar switch is turned off, when the second indicating unit L can work normally, it indicates that the rectifying unit of the electroscope module is normal; when the second indicating unit L cannot work normally, the rectifying unit of the electricity testing module is in fault.

It should be noted that, although the dc power supply U is further electrically connected to the light emitting diode LED to form a loop, the positive electrode of the dc power supply U is electrically connected to the negative electrode of the light emitting diode LED, the negative electrode of the dc power supply U is electrically connected to the positive electrode of the light emitting diode LED, current cannot flow through the light emitting diode LED, and current cannot flow through the second indicating unit L, so that the second indicating unit L operates, that is, the loop formed by the dc power supply U, the light emitting diode LED, and the second indicating unit L is in an off state, and therefore only the loop formed by the dc power supply U, the rectifying unit, and the second indicating unit L is turned on.

Similarly, it should be understood that the inspection module is used before the electricity testing module performs electricity testing, that is, when the coil of the electricity testing module is not yet sleeved on the overhead line to detect whether the line has current, the coil cannot generate alternating current to be output to the rectifying unit, so that the rectifying unit performs direct current conversion on the alternating current. The maintainer is through using the test module before testing the electricity, with the second bipolar switch closure, forms the return circuit between DC power supply U, rectifier unit and the second indicating unit L, through observing whether normal work of second indicating unit, can judge whether there is the trouble in rectifier unit.

It should be understood that the second indicating unit L shown in fig. 3 may be an indicator light or a buzzer, and sends out an optical signal or an acoustic signal to determine whether current flows through the overhead line. It should be noted that the second indication unit includes, but is not limited to, the above-mentioned indicator light and buzzer. When the second indicating unit is an indicating lamp, the second indicating unit may be a common bulb or a light emitting diode, and when the second indicating unit is a light emitting diode, the connection relationship between the positive electrode and the negative electrode of the light emitting diode needs to be noticed, at this time, the positive electrode of the light emitting diode of the second indicating unit needs to be electrically connected with the positive electrode of the light emitting diode LED of the first indicating unit, and the negative electrode of the light emitting diode of the second indicating unit needs to be electrically connected with the third end of the second bipolar switch.

In order to facilitate judgment of the service personnel, in one embodiment, the light emitting diode of the second indicating unit and the light emitting diode of the first indicating unit are light emitting diodes emitting light with different colors.

In one embodiment, referring to fig. 3, the voltage stabilizing unit includes a bidirectional zener diode ZD, a first terminal of the bidirectional zener diode ZD is electrically connected to a first output terminal of the common mode inductor L2, and a second terminal of the bidirectional zener diode ZD is electrically connected to a second output terminal of the common mode inductor L2. Because the common mode inductor outputs alternating current, in this embodiment, the voltage stabilizing unit adopts a bidirectional voltage stabilizing diode connected in parallel to the two output ends of the common mode inductor, so as to perform the voltage stabilizing function.

To further protect the electroscopic module, referring to fig. 2, in one embodiment, the electroscopic module 10 further comprises an overvoltage protection unit 160, the first output terminal and the second output terminal of the common mode inductor 120 are further electrically connected to the overvoltage protection unit 160, and specifically, referring to fig. 3, the overvoltage protection unit includes a first bi-directional transient suppression diode D5 and a second bi-directional transient suppression diode D6, a first terminal of the first bi-directional transient suppression diode D5 is electrically connected to a first output terminal of the common mode inductor L2, a first terminal of the second bi-directional transient suppression diode D6 is electrically connected to a second output terminal of the common mode inductor L2, a second terminal of the first bi-directional transient suppression diode D5 is electrically connected to a second terminal of the second bi-directional transient suppression diode D6, and a second terminal of the first bi-directional transient suppression diode D5 is connected to ground.

In this embodiment, the first bi-directional tvs and the second bi-directional tvs are bi-directional tvs. When the bidirectional transient voltage suppression diode is used for a high-energy transient overvoltage pulse, the working impedance of the bidirectional transient voltage suppression diode can be quickly reduced to a lower conduction value, and the voltage is clamped to a preset level, so that elements in a circuit are effectively protected from being damaged.

In order to further protect the electricity testing module, referring to fig. 3, in one embodiment, the overvoltage protection unit further includes an arrester F, a first end of the arrester F is electrically connected to the first output end of the common mode inductor L2, a second end of the arrester F is electrically connected to the second output end of the common mode inductor L2, and the arrester F has a ground terminal for grounding. In this way, the electroscopic module can further avoid the harm of high transient overvoltage.

In order to further protect the electricity verification module, please refer to fig. 2, in one embodiment, the electricity verification module 100 further includes an anti-surge unit 170, the first output terminal and the second output terminal of the common mode inductor 120 are further electrically connected to the anti-surge unit 170, specifically, referring to fig. 3, the anti-surge unit includes a first capacitor C1 and a second capacitor C2, a first end of the first capacitor C1 is electrically connected to the first output terminal of the common mode inductor L2, a first end of the second capacitor C2 is electrically connected to the second output terminal of the common mode inductor L2, a second end of the first capacitor C1 is electrically connected to the second end of the second capacitor C2, and a second end of the first capacitor C1 is used for grounding. Thus, damage of the surge current can be prevented.

In one embodiment, referring to fig. 3, the surge protection unit further includes a first thermistor R1 and a second thermistor R2, a first end of the first thermistor R1 is electrically connected to a first end of the first capacitor C1, a second end of the first thermistor R1 is electrically connected to a first input end of the rectifier unit, a first end of the second thermistor R2 is electrically connected to a first end of the second capacitor C2, and a second end of the second thermistor R2 is electrically connected to a second input end of the rectifier unit. Specifically, in the present embodiment, the first thermistor and the second thermistor are positive temperature coefficient thermistors. By connecting the positive temperature coefficient thermistor in series between the capacitor and the rectifying unit, the flowing current heats up to increase the resistance value of the thermistor, and the surge current is further limited.

In order to further protect the electricity testing module, in one embodiment, the overhead line electricity testing device further includes a housing, the second end of the first bi-directional transient suppression diode, the ground terminal of the arrester, and the second end of the first capacitor are connected to the housing, the housing is used for grounding, an accommodating space is opened inside the housing, and the electricity testing module is disposed in the accommodating space. Particularly, the shell is made of an insulating material, so that the electricity testing module can be effectively protected and protected.

The structure of the housing is further described below:

in one embodiment, referring to fig. 5 and 8, an overhead wire electroscope 10 includes: the shell 300 is made of an insulating material, the shell 300 includes an induction sleeve ring 310 and a mounting base 320, the induction sleeve ring 310 is arranged at one end of the mounting base 320, the induction sleeve ring 310 has a receiving through hole 311, the receiving through hole is used for receiving an overhead wire, that is, the overhead wire passes through the receiving through hole, a first receiving space (not shown) is formed inside the induction sleeve ring 310, and a second receiving space (not shown) is formed inside the mounting base 320; the electroscopic module comprises a coil, a common-mode inductor, a voltage stabilizing unit, a rectifying unit and a lamp panel 400, wherein a first end of the coil is electrically connected with a first input end of the common-mode inductor, a second end of the coil is electrically connected with a second input end of the common-mode inductor, a first output end of the common-mode inductor is electrically connected with a first input end of the rectifying unit, a second output end of the common-mode inductor is electrically connected with a second input end of the rectifying unit, an output end of the rectifying unit is electrically connected with the lamp panel, and the first output end and the second output end of the common-mode inductor are also electrically connected with the voltage stabilizing unit; the coil set up in the first accommodation space, first accommodation space is cyclic annular, the coil is hollow coil, and the lateral wall that the coil is close to the holding through-hole sets up, common mode inductance voltage stabilizing unit reaches the rectification unit set up in the second accommodation space, lamp plate 400 set up in the mount pad is kept away from the one end of the response lantern ring. In this embodiment, the lamp plate is the first indication unit in any one of the above embodiments.

Above-mentioned overhead line tests electric installation's electricity module of testing includes the coil, common mode inductance, voltage stabilizing unit and rectifier unit, the coil sets up in the induction lantern ring, the induction lantern ring has a holding hole, establish overhead line cover in the holding hole, when overhead line has the current to flow, based on the electromagnetic induction principle, the coil can produce the electromotive force, the electromotive force is the alternating current, common mode inductance is used for filtering the alternating current, voltage stabilizing unit has the steady voltage effect, be used for protecting and test the electric module, the alternating current converts the direct current into through rectifier unit, rectifier unit and lamp plate electric connection, the direct current provides the power for the lamp plate, when the lamp plate sends light, then it has the electric current to show the circuit of monitoring. Like this, above-mentioned overhead line tests electric installation and passes through the electromagnetic induction principle and senses overhead line current in the secondary circuit to whether accurate judgement overhead line has the electric current to flow, need not external power supply, can avoid causing the insulation fault of overhead line and secondary circuit, and be provided with common mode inductance and voltage stabilizing unit, further improve overhead line and test electric installation's detection security, can avoid causing the personal and equipment injury. And the shell is used for protecting the electricity testing module, and effectively prolongs the service life of the overhead line electricity testing device.

In one embodiment, referring to fig. 7, the receiving hole 311 has a circular cross section. Therefore, the shape of the cross section of the accommodating through hole is the same as that of the cross section of the overhead line, and the overhead line can conveniently pass through the accommodating through hole. In one embodiment, the diameter of the section of the accommodating through hole is 0.5 cm to 1 cm larger than that of the section of the overhead line. Therefore, the coil is favorable for easily sensing the current flowing through the overhead line to generate electromagnetic induction.

In order to facilitate the overhead wire to pass through the induction sleeve, please refer to fig. 7 and 8, in one embodiment, the induction sleeve 310 includes a fixed portion 312 and a movable portion 313, the fixed portion 320 is fixedly connected to the mounting base 320, the fixed portion 312 is disposed opposite to the movable portion 313, the accommodating through hole 311 is formed between the fixed portion 312 and the movable portion 313, one end of the fixed portion 312 is rotatably connected to one end of the movable portion 313, the other end of the fixed portion 312 is movably connected to the other end of the movable portion 313, that is, the first end of the fixed portion 312 is rotatably connected to the first end of the movable portion 313, and the second end of the fixed portion 312 is movably abutted to the second end of the movable portion 313. That is to say, the first end of fixed part is rotatable with the first end of movable part for the second end of fixed part keeps away from each other with the second end of movable part, and like this, the holding through-hole switches into one and has an open-ended groove, and the maintainer can pass the holding through-hole with the overhead line, tests electric work, has improved the convenience that the overhead line tested electric installation.

In one embodiment, a second end of the fixing portion is provided with a fastening member, a second end of the movable portion is provided with a fastening hole, and the second end of the fixing portion and the second end of the movable portion are connected in a fastening mode through the fastening member and the fastening hole. In one embodiment, the second end of the fixing portion is provided with a fastening hole, the second end of the movable portion is provided with a fastening piece, and the second end of the fixing portion and the second end of the movable portion are connected in a fastening mode through the fastening hole and the fastening piece.

In order to improve the safety of the overhead line electricity testing device, referring to fig. 7, in one embodiment, the mounting base 320 is further provided with a protective cover 321, and the protective cover 321 is disposed at one end of the mounting base 320 close to the lamp panel 400 and around the periphery of the lamp panel 400. Like this, the safety cover can protect the lamp plate and test the electric module, improves the security that the electric device was tested to the overhead line, is favorable to increasing the overhead line and tests the life of electric device.

In one embodiment, referring to fig. 7 again, the cross-sectional radius of the protection cap 321 gradually increases from the end close to the mounting seat 320 to the end far from the mounting seat 320. That is to say, the safety cover is the round platform structure to the one end that the diameter is less is connected with the mount pad, is the umbelliform setting promptly, like this, can ensure sufficient creepage distance, and also can prevent that the rainwater from getting into the lamp plate.

In order to improve the brightness of the lamp panel, please refer to fig. 7 and 8, in one embodiment, the overhead wire electricity inspection device 10 further includes a lamp shade 330, the lamp shade 330 is connected to the mounting seat 320, and the lamp shade 330 is disposed in the protective cover 321 and around the periphery of the lamp panel 400. In this embodiment, the lamp shade is arranged in the inner space surrounded by the protective cover, and the lamp shade is in a round table structure, and the section radius of the lamp shade is smaller than that of the protective cover. Like this for the light that the lamp plate sent is more concentrated, and whether the circuit of being convenient for maintainer observing judgement monitoring when carrying out the electroscope work has the electric current.

In order to facilitate the fixing on the power tower, please refer to fig. 9, in one embodiment, the overhead line electricity testing device 10 further includes a support 500, the support 500 is provided with a first clamping member 510, and the first clamping member 510 clamps the mounting seat 320. Specifically, the support can be fixed on the shaft tower, has seted up the mounting hole on the support, and accessories such as accessible screw are fixed with the shaft tower, and first holder centre gripping mount pad is in order fixed for the overhead line tests electric installation can fixed mounting on electric power tower, when the maintainer tests electric work, only needs to place the overhead line with the response lantern ring cover, can begin to test electric work.

In order to further improve the stability of the housing mounted on the bracket, referring to fig. 9, in one embodiment, the bracket 500 is further provided with a second clamping member 520, the second clamping member 520 is spaced apart from the first clamping member 510, and the second clamping member 520 clamps the lamp housing 330. Like this, second holder centre gripping lamp shade for the shell can be installed on the support more steadily, is favorable to improving the steadiness that the overhead line electroscope device installed on electric power tower.

In order to further improve the convenience of using the overhead line electricity testing device, please refer to fig. 6 and 9, in one embodiment, the bracket 500 includes a fixing plate 530, a first pulling plate 540 and a second pulling plate 550, the first clamping member 510 is disposed on the fixing plate 530, the first pulling plate 540 is provided with a first pulling through groove 541, an extending direction of the first pulling through groove 541 is the same as an extending direction of the first pulling plate 540, and an end portion of the first clamping member 510 close to the fixing plate 530 is inserted into the first pulling through groove 541; one end of the first pulling plate 540 is connected with one end of the second pulling plate 550, and the other end of the second pulling plate 550 is fixedly connected with the movable part 313 of the induction collar 310; one end of the first pulling plate 540, which is far away from the second pulling plate 550, is provided with a limiting elastic member 560, the extending direction of the limiting elastic member 560 is the same as the extending direction of the first pulling plate 540, one end of the limiting elastic member 560, which is close to the first pulling through groove 541, is provided with a positioning member 561, one end of the first clamping member 510, which is close to the fixing plate 530, is provided with a first positioning hole 511, and the positioning member 561 penetrates through the first positioning hole 511.

Specifically, the first pulling plate is provided with a first pulling through groove, a part of the clamping piece penetrates through the first pulling through groove, and the extending direction of the first pulling through groove is the same as that of the first pulling plate, so that the first pulling plate can be pulled back and forth towards the extending direction of the first pulling plate under the condition that the fixing plate is fixedly installed; the one end of first arm-tie is connected with the one end of second arm-tie, and the other end of second arm-tie is connected with the movable part of response lantern ring, when first arm-tie orientation when keeping away from the direction pulling of second arm-tie, then can drive the second end of the movable part of response lantern ring and keep away from the second end of fixed part, make the holding through-hole switch into one and have an open-ended groove, thus, the maintainer only need towards the first arm-tie of direction pulling of keeping away from the second arm-tie, can pass the holding through-hole with the overhead line and test electric work, the use convenience that not only has improved the overhead line and has tested electric installation, still make maintainer and overhead line keep great safe distance, improve personal safety. Still be provided with spacing elastic component on the first arm-tie, spacing elastic component's flexible direction is the same with the extending direction of first arm-tie, that is to say, spacing elastic component's flexible direction is the same with the direction of motion of first arm-tie, and, spacing elastic component's one end is connected with first arm-tie, the other end is worn to establish in the locating hole of first holder through the setting element, when the maintainer when the first arm-tie of direction pulling towards keeping away from the second arm-tie, the holding through-hole switches into one and has an open-ended groove, the maintainer passes the holding through-hole with overhead line, at this moment, spacing elastic component takes place deformation under the exogenic action and lengthens, when the maintainer removes the exogenic action to first arm-tie, under the elastic action of spacing elastic component, the spring resets, can drive the movable part of response lantern ring and reset, the holding through-hole switches into a hole that the lateral wall encir. Therefore, the use convenience of the overhead line electricity testing device can be further improved.

In one embodiment, referring to fig. 9, the first pulling plate 540 is provided with a second pulling through groove 542, the second pulling through groove 542 and the first pulling through groove 541 are arranged at an interval, an extending direction of the second pulling through groove 542 is the same as an extending direction of the first pulling plate 540, and an end portion of the second clamping member 520 close to the fixing plate 530 is inserted into the second pulling through groove 542.

In one embodiment, referring to fig. 9, the second clamping member 520 has the second positioning hole 521 formed therein, and the positioning element of the limiting elastic member is inserted into the second positioning hole 521 of the second clamping member 520.

In order to improve the stability of the position limiting elastic member, referring to fig. 6, in one embodiment, the positioning member 561 has a hook structure, and the hook structure is clamped in the first positioning hole 511 or the second positioning hole 521. Like this for the setting element can be firmly with the locating hole cooperation, avoids unclamping under spacing elastic component's elastic action.

In order to further improve the stability of the elastic limiting member, please refer to fig. 6 again, in one embodiment, a fixing member 562 is disposed at an end of the elastic limiting member 560 away from the first pulling through slot 541, and the fixing member 562 is fixedly connected to the first pulling plate 540. Like this, the one end that second arm-tie was kept away from to spacing elastic component can be fixed on first arm-tie firmly, further improves the steadiness of locating part.

In order to improve the safety of the overhead line electricity testing device, in one embodiment, the overhead line electricity testing device further comprises a checking module, the checking module is used for checking whether the electricity testing module has a fault, the checking module is electrically connected with the electricity testing module, the checking module is arranged in the second accommodating space, the lamp panel comprises a first light-emitting module and a second light-emitting module, the first light-emitting module is electrically connected with the electricity testing module, and the second light-emitting module is electrically connected with the checking module. That is to say, first light-emitting module is used for testing electric module, detects whether the overhead line has the electric current to flow, and the second light-emitting module is used for testing the module, and whether maintainer can detect before testing electric work and test electric module and have the trouble to can accurately judge whether the circuit has the electric current, and can effectively avoid testing the personal safety harm that electric device took place because of the overhead line that adopts to have the trouble, effectively improve the security that electric device was tested to the overhead line. It should be noted that the first light-emitting module and the second light-emitting module may be distributed at different positions on the lamp panel to show the difference, or the light emitted by the first light-emitting module and the second light-emitting module may be in different colors to show the difference.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. An overhead line electricity testing device is characterized by comprising an electricity testing module, wherein the electricity testing module comprises a coil, a common mode inductor, a voltage stabilizing unit, a rectifying unit and a first indicating unit,

the first end of the coil is electrically connected with the first input end of the common-mode inductor, the second end of the coil is electrically connected with the second input end of the common-mode inductor, the first output end of the common-mode inductor is electrically connected with the first input end of the rectifying unit, the second output end of the common-mode inductor is electrically connected with the second input end of the rectifying unit, the output end of the rectifying unit is electrically connected with the first indicating unit, and the first output end and the second output end of the common-mode inductor are also electrically connected with the voltage stabilizing unit.

2. The overhead line electroscope of claim 1, wherein the rectifying unit is a bridge rectifying unit.

3. The overhead line electricity testing device according to claim 2, wherein the first indicating unit comprises at least one light emitting diode, an anode of the light emitting diode is electrically connected to an anode output terminal of the bridge rectifying unit, and a cathode of the light emitting diode is electrically connected to a cathode output terminal of the bridge rectifying unit.

4. The overhead line electricity inspection device of claim 3, further comprising an inspection module electrically connected to the electricity inspection module, wherein the inspection module comprises a DC power source and a first bipolar switch, a first end of the first bipolar switch is electrically connected to a positive electrode of the DC power source, a second end of the first bipolar switch is electrically connected to a positive electrode of the LED, a third end of the first bipolar switch is electrically connected to a negative electrode of the DC power source, and a fourth end of the first bipolar switch is electrically connected to a negative electrode of the LED.

5. The overhead line electroscope of claim 4, wherein the inspection module further comprises a second bipolar switch and a second indication unit, a first end of the second bipolar switch is electrically connected to the cathode of the light emitting diode, a second end of the second bipolar switch is electrically connected to the anode of the DC power source, a third end of the second bipolar switch is electrically connected to the first end of the second indication unit, and a fourth end of the second bipolar switch is electrically connected to the cathode of the DC power source; the second end of the second indicating unit is electrically connected with the anode of the light emitting diode.

6. The overhead line electricity inspection device of claim 1, wherein the voltage regulator unit comprises a bi-directional voltage regulator diode, a first terminal of the bi-directional voltage regulator diode is electrically connected to the first output terminal of the common mode inductor, and a second terminal of the bi-directional voltage regulator diode is electrically connected to the second output terminal of the common mode inductor.

7. The overhead line electroscope of claim 1, wherein the electroscope module further comprises an overvoltage protection unit, the first and second output terminals of the common mode inductor are further electrically connected to the overvoltage protection unit, the overvoltage protection unit comprises a first bi-directional transient suppression diode and a second bi-directional transient suppression diode, a first end of the first bi-directional transient suppression diode is electrically connected to the first output terminal of the common mode inductor, a first end of the second bi-directional transient suppression diode is electrically connected to the second output terminal of the common mode inductor, a second end of the first bi-directional transient suppression diode is electrically connected to a second end of the second bi-directional transient suppression diode, and the second end of the first bi-directional transient suppression diode is configured to be grounded.

8. The overhead line electricity inspection device of claim 7, wherein the overvoltage protection unit further comprises an arrester, a first end of the arrester is electrically connected to the first output terminal of the common mode inductor, a second end of the arrester is electrically connected to the second output terminal of the common mode inductor, and the arrester has a ground terminal for grounding.

9. The overhead line electricity inspection device of claim 1, wherein the electricity inspection module further comprises an anti-surge unit, the first output terminal and the second output terminal of the common mode inductor are further electrically connected to the anti-surge unit, the anti-surge unit comprises a first capacitor and a second capacitor, a first end of the first capacitor is electrically connected to the first output terminal of the common mode inductor, a first end of the second capacitor is electrically connected to the second output terminal of the common mode inductor, a second end of the first capacitor is electrically connected to a second end of the second capacitor, and a second end of the first capacitor is used for grounding.

10. The overhead line electricity inspection device of claim 9, wherein the anti-surge unit further comprises a first thermistor and a second thermistor, a first end of the first thermistor is electrically connected to a first end of the first capacitor, a second end of the first thermistor is electrically connected to a first input end of the rectifying unit, a first end of the second thermistor is electrically connected to a first end of the second capacitor, and a second end of the second thermistor is electrically connected to a second input end of the rectifying unit.

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