JP2021128121A - Electroscope - Google Patents

Abstract

To provide an electroscope that can confirm a contact between a detector and a detection target object and can attain the safety of a work.SOLUTION: The electroscope includes: a detector 11 electrically connected to a cable run 10 by being in contact with the cable run 10; and a body part 12, the detector 11 being located in an end of the body part 12, the detector 11 being in contact with the cable run 10 so that the charge state of the cable run 10 is determined by the body part 12 and is notified. The body part 12 contains a sensor 24 for detecting a contact between the detector 11 and the cable run 10, a determination circuit 16 determines a non-charge state of the electric run 10 on the basis of the detected output of the sensor 24, and the non-charge state can be notified by a lamp 19 and a buzzer 21.SELECTED DRAWING: Figure 1

Description

The present invention relates to, for example, a voltage detector used to determine the charging state of a voltage charging unit in a power facility installed on a utility pole or the like.

In general, for electric power equipment installed on utility poles, for example, electric lines such as high and low pressure distribution lines and electric power equipment such as pole transformers, for performing electrical work such as maintenance and inspection and replacement work voluntarily or regularly. I am trying to do it.

Prior to carrying out this type of electrical work, it is possible to prevent an electric shock accident due to contact by an operator by determining the charging state or power failure state of an electric circuit or electric power device.

Usually, the charging state of an electric circuit, an electric power device, or the like (hereinafter, collectively referred to as a voltage detection object) is determined by an operator using a portable voltage detector (for example, Patent Documents). 1).

The voltage detector disclosed in Patent Document 1 includes a detector that is electrically connected to the voltage detection object by contact with the voltage detection object, a main body portion provided with the detector at the tip, and the main body thereof. It is provided with an insulating grip extending from the base end of the portion.

The main body has a built-in detection circuit that operates based on a detection signal input from the detector. Further, the main body is provided with a lamp and a buzzer that operate based on the output of the detection circuit.

The voltage detection work prior to the electrical work is performed as follows. First, the operator brings the detector of the voltage detector into contact with the object to be detected while holding the grip portion of the voltage detector.

If the voltage detection target is in a charged state due to contact between the detector and the voltage detection target, the detection circuit section of the main body determines the charge status of the voltage detection target based on the detection signal from the detector. ..

The output of this detection circuit unit causes the lamp of the main unit to emit light and the buzzer to sound. As a result, the operator is notified that the voltage detection target is in the charged state.

In this case, after the power to be detected is cut off, the worker starts electrical work such as maintenance and inspection and replacement work.

JP-A-2002-148287

By the way, in the voltage detector of Patent Document 1 described above, by bringing the detector into contact with the voltage detection object, the detection circuit unit of the main body determines the charging state of the voltage detection object, and the lamp provided in the main body The operator is notified by the light emission and the sound of the buzzer.

Here, the operator may erroneously recognize that the detector is in contact with the voltage detection object even though the detector is not in contact with the voltage detection object. In this case, since the detector and the voltage detection object are not in contact with each other in practice, there is no light emission of the lamp and no sound of the buzzer notifying that the voltage detection object is in the charged state.

However, due to the misrecognition that the detector is in contact with the object to be detected, the operator does not emit light from the lamp or sound the buzzer, so the operator starts electrical work such as maintenance and replacement work. It may end up.

As a result, when the object to be electroscoped is in a charged state, an electric shock accident may occur due to contact with an operator, and it becomes difficult to ensure safety in work.

Therefore, the present invention has been proposed in view of the above-mentioned problems, and the purpose of the present invention is to confirm the contact between the detector and the object to be detected, and to ensure the safety of work. It is to provide electric appliances.

The present invention includes a detector that is electrically connected to the voltage detection object by contact with the voltage detection target, and a main body portion in which the detector is provided at the tip, and the detector is the voltage detection target. It is a voltage detector that determines the charging state of the object to be detected by the main body and notifies it by contacting the voltage detector.

As a technical means for achieving the above-mentioned object, the present invention incorporates a sensor for detecting contact between the detector and the voltage detection object in the main body, and based on the detection output of the sensor, the voltage detection object. It is characterized in that it is possible to determine and notify the non-charged state of.

As a means for notifying the non-charged state of the object to be detected, the light emission of the lamp provided in the main body and the sound of the buzzer are preferable.

In the present invention, the contact between the detector and the voltage detection object is automatically detected by the sensor, and the non-charged state of the voltage detection target can be determined and notified based on the detection output of the sensor. It is possible to confirm the contact between the detector and the voltage detection target, and further recognize that the voltage detection target is in a non-charged state.

As a result, it is possible to prevent the operator from erroneously recognizing that the detector is in contact with the voltage detection object even though the detector is not in contact with the voltage detection object. Furthermore, since it is possible to start electrical work such as maintenance and inspection and replacement work after recognizing that the object to be detected is in a non-charged state, work safety can be achieved.

In the present invention, it is desirable that the detector is foldably attached to the main body and the contact between the detector and the object to be detected is detected by the sensor by bending the detector with respect to the main body.

If such a structure is adopted, a means for detecting the contact between the detector and the voltage detection object by the sensor can be realized with a simple structure.

According to the present invention, the contact between the detector and the voltage detection object can be confirmed, and further, it is possible to recognize that the voltage detection target is in a non-charged state.

As a result, it is possible to prevent the operator from erroneously recognizing that the detector is in contact with the voltage detection object even though the detector is not in contact with the voltage detection object. Furthermore, since it is possible to start electrical work such as maintenance and inspection and replacement work after recognizing that the object to be detected is in a non-charged state, work safety can be achieved.

FIG. 5 is a block diagram showing a schematic configuration of a voltage detector incorporating a sensor for detecting tilt of a detector in an embodiment of the present invention. It is a block diagram which shows the schematic structure of the voltage detector which built in the inclination detection sensor of the main body part in another embodiment of this invention. It is a block diagram which shows the schematic structure of the voltage detector which built in the vibration sensor in another embodiment of this invention. It is a block diagram which shows the schematic structure of the voltage detector which built in the short circuit detection sensor of a detector in another embodiment of this invention.

An embodiment of the voltage detector according to the present invention will be described in detail below with reference to the drawings.

In the following embodiments, electric lines (insulated coated electric wires and bare electric wires) such as high and low voltage distribution lines are exemplified as the objects to be detected, but other electric lines including power devices such as pole transformers are also included. It can be applied even if it is an object to be detected.

Before explaining the characteristic configuration of each embodiment shown in FIGS. 1 to 4, a schematic configuration of a voltage detector common to each embodiment will be described below. The same components in each of the embodiments of FIGS. 1 to 4 will be described with reference to the same reference numerals.

The voltage detector of each embodiment is a voltage detector that is performed prior to performing electrical work such as maintenance and replacement work voluntarily or regularly, and is performed by determining the charging state or power failure state of the electric circuit. This is to prevent an electric shock accident due to contact with an operator.

The voltage detector of each embodiment is a portable one, and as shown in FIGS. 1 to 4, detection of conductivity that is electrically connected to the electric circuit 10 by contact with the electric circuit 10 which is an object to be detected. A child (detection electrode) 11, a main body 12 provided with the detector 11 at the tip thereof, and an insulating grip portion 13 extending from the base end of the main body 12 are provided.

The grip portion 13 of the embodiment exemplifies a short one made of a single tubular member, but in addition to this, by manually expanding and contracting a plurality of tubular members such as a rod antenna of a radio. It may be that of a grip portion whose length can be adjusted.

The voltage detector of each embodiment is for high and low voltage that can determine whether the electric circuit 10 is in a low voltage or high voltage charging state, and is determined to be a low voltage level detection circuit 14 and a high voltage level detection circuit 15. The circuit is composed of a circuit 16 and an acoustic oscillation circuit 17.

A detector 11 is connected to the input side of the low voltage level detection circuit 14 and the high voltage level detection circuit 15. Further, the determination circuit 16 is connected to the output side of the low voltage level detection circuit 14 and the high voltage level detection circuit 15. Further, an acoustic oscillation circuit 17 is connected to the output side of the determination circuit 16.

A current limiting resistor 18 is inserted between the detector 11 and the low-voltage level detection circuit 14 and the high-voltage level detection circuit 15. By providing the current limiting resistor 18 in this way, it is possible to prevent an undesired high voltage from entering the low voltage level detection circuit 14 and the high voltage level detection circuit 15.

The main body 12 incorporates a wiring board (not shown) on which the electronic components constituting the low-voltage level detection circuit 14, the high-voltage level detection circuit 15, the determination circuit 16, and the acoustic oscillation circuit 17 are mounted, and is mounted on the wiring board. In addition to the mounting circuit components, it includes a non-charge indicator lamp (LED) 19, a charge indicator lamp (LED) 20, a buzzer 21, and a battery 22.

The non-charge display lamp 19, the charge display lamp 20, and the buzzer 21 are connected to the output side of the acoustic oscillation circuit 17. Further, the battery 22 is connected to the input side of the low voltage level detection circuit 14 and the high voltage level detection circuit 15 via the test button 23, and is connected to the acoustic oscillation circuit 17.

The non-charge display lamp 19, the charge display lamp 20, and the buzzer 21 are arranged so as to be visible in the housing of the main body 12.

An operation example of the voltage detector having the above configuration will be described below. That is, the voltage detection work prior to the electrical work is performed as follows. Before the work, by turning on the test button 23, the battery 22 drives the low-voltage level detection circuit 14, the high-voltage level detection circuit 15, and the acoustic oscillation circuit 17, so that the operation of the voltage detector can be confirmed. ing.

First, the operator brings the detector 11 of the voltage detector into contact with the electric path 10 while holding the grip portion 13 of the voltage detector. If the electric path 10 is in a charged state due to the contact between the detector 11 and the electric path 10, the determination circuit 16 of the main body 12 determines the charged state of the electric path 10 based on the detection signal from the detector 11.

If the electric circuit 10 is in the low-voltage charging state, the determination circuit 16 determines that the electric circuit 10 is in the low-voltage charging state based on the output of the low-voltage level detection circuit 14, and the output of the acoustic oscillation circuit 17 is used based on the output of the determination circuit 16. The charge display lamp 20 is made to emit light intermittently in a short cycle, and the buzzer 21 is made to sound intermittently in a short cycle. As a result, the operator is notified that the electric circuit 10 is in the low-voltage charging state.

If the electric circuit 10 is in the high-voltage charging state, the determination circuit 16 determines that the electric circuit 10 is in the high-voltage charging state based on the output of the high-voltage level detection circuit 15, and the output of the acoustic oscillation circuit 17 is used based on the output of the determination circuit 16. The charge display lamp 20 is continuously emitted and the buzzer 21 is continuously sounded. As a result, the operator is notified that the electric path 10 is in the high voltage charging state.

In this way, when the electric circuit 10 is in the low-voltage charging state or the high-voltage charging state, the operator starts electrical-related work such as maintenance and inspection and replacement work after the electric circuit 10 is cut off.

The schematic configuration of the voltage detector in each embodiment is as described above, but the characteristic configuration in each embodiment will be described in detail below.

In the voltage detector of each embodiment, as shown in FIGS. 1 to 4, sensors 24 to 27 for detecting contact between the detector 11 and the electric path 10 are built in the main body 12, and are used as detection outputs of the sensors 24 to 27. Based on this, it is possible to determine and notify the non-charged state of the electric circuit 10. The outputs of the sensors 24 to 27 are connected to the determination circuit 16.

In the voltage detector of the embodiment shown in FIG. 1, the detector 11 is flexibly attached to the tip of the main body 12, and the contact between the detector 11 and the electric path 10 at the start of the voltage detection work is shown by a broken line in the figure. As described above, when the detector 11 is bent with respect to the main body 12, the sensor 24 detects it. In this case, the sensor 24 is arranged near the attachment location of the detector 11.

In the embodiment of FIG. 1, the distance between the tip and the rear end of the detector 11 is pivotally attached to the tip of the main body 12 so that both the tip and the rear end of the bendable detector 11 rotate. You may try to do it. This enables a voltage detector with the following three structures.

First, a magnet is attached to the rear end of the detector 11, and a sensor 24 for detecting the magnetic force generated by the magnet is used. In this case, when the detector 11 comes into contact with the electric path 10, the detector 11 bends with respect to the main body 12, so that the rear end portion of the detector 11 rotates. As a result, the sensor 24 detects the change in the magnetic force generated by the movement of the magnet at the rear end.

Secondly, a sensor 24 is used in which a flat surface portion is formed at the rear end portion of the detector 11 and the distance from the flat surface portion is measured. In this case, when the detector 11 comes into contact with the electric path 10, the detector 11 bends with respect to the main body 12, so that the rear end portion of the detector 11 rotates. As a result, the sensor 24 detects a change in the distance from the flat surface portion caused by the movement of the flat surface portion at the rear end portion.

Thirdly, a pass-through sensor 24 is used in which a rod-shaped portion is formed at the rear end of the detector 11 and the presence or absence of the rod-shaped portion is detected. In this case, when the detector 11 comes into contact with the electric path 10, the detector 11 bends with respect to the main body 12, so that the rear end portion of the detector 11 rotates. As a result, the sensor 24 detects that the rod-shaped portion at the rear end moves so that the rod-shaped portion does not exist.

In the voltage detector of the embodiment shown in FIG. 2, the grip portion 13 is flexibly attached to the base end of the main body portion 12, and at the start of the voltage detection work, the contact between the detector 11 and the electric path 10 is indicated by a broken line in the drawing. As shown, the sensor 25 detects when the main body 12 and the detector 11 are bent with respect to the grip 13. In this case, the sensor 25 is arranged in the vicinity of the attachment portion of the grip portion 13.

In the voltage detector of the embodiment shown in FIG. 3, at the start of the voltage detection work, the contact between the detector 11 and the electric path 10 is shown by the contact between the detector 11 and the electric path 10 as shown by the broken line in the figure. The vibration generated in 12 is detected by the sensor 26.

In the voltage detector of the embodiment shown in FIG. 4, two detectors 11 are attached to the tips of the main body 12, and the contact between the detector 11 and the electric path 10 at the start of the voltage detection work is shown by a broken line in the figure. As described above, when a short-circuit state occurs between the two detectors 11, the sensor 27 detects it. In this case, the sensor 27 is arranged between the two detectors 11.

By adopting the structure as in the embodiment shown in FIGS. 1 to 4, it is possible to realize a means for detecting the contact between the detector 11 and the electric path 10 by the sensors 24 to 27 with a simple structure.

In the voltage detectors of FIGS. 1 to 4 having the above configuration, the contact between the detector 11 and the electric circuit 10 is automatically detected by the sensors 24 to 27, and the electric circuit 10 is based on the detection output of the sensors 24 to 27. The non-charged state is determined by the determination circuit 16, and the non-charged display lamp 19 is intermittently emitted with the output of the acoustic oscillation circuit 17 based on the output of the determination circuit 16 and the buzzer 21 is emitted for a long period. Make it sound intermittently. As a result, the operator is notified that the electric path 10 is in a non-charged state.

As a result, at the start of the voltage detection work, the operator can confirm the contact between the detector 11 and the electric path 10, and can accurately recognize that the electric path 10 is in a non-charged state. After that, the worker will start electrical work such as maintenance and inspection and replacement work.

As a result, it is possible to prevent the operator from erroneously recognizing that the detector 11 is in contact with the electric path 10 even though the detector 11 is not in contact with the electric path 10. Further, since it is possible to start electrical work such as maintenance and inspection and replacement work after recognizing that the electric circuit 10 is in a non-charged state, work safety can be ensured.

In the above embodiment, the voltage detection target is described as the electric circuit 10, but when the voltage detection target is a terminal plate, the detector 11 is removably attached to the tip of the main body 12 to perform the voltage detection work. At the start of the above, the contact between the detector 11 and the terminal plate may be detected by the sensor 24 when the detector 11 moves back and forth with respect to the main body 12. In this case, the sensor 24 may be arranged near the attachment location of the detector 11 (see FIG. 1).

Further, when the object to be detected is a terminal plate, the grip portion 13 is attached to the base end of the main body portion 12 so as to be retractable, and at the start of the voltage detection work, the contact between the detector 11 and the terminal plate is made to the main body portion. The sensor 25 may detect when the grip portion 13 moves in and out of the twelve. In this case, the sensor 25 may be arranged in the vicinity of the attachment portion of the grip portion 13 (see FIG. 2).

The present invention is not limited to the above-described embodiments, and it goes without saying that the present invention can be carried out in various forms without departing from the gist of the present invention. Indicated by the scope of the claim and further includes the equal meaning described in the claims, and all modifications within the scope.

10 Electroscope target (electric line)
11 Detector 12 Main unit 19 Lamp (lamp for non-charging display)
21 buzzer 24-27 sensor

Claims (3)

A detector that is electrically connected to the voltage detection object by contact with the voltage detection object and a main body portion provided with the detector at the tip are provided, and the detector is brought into contact with the voltage detection object. This is a voltage detector that determines and notifies the charging state of the object to be detected by the main body.
A sensor for detecting contact between the detector and the voltage detection object is built in the main body, and the non-charged state of the voltage detection object can be determined and notified based on the detection output of the sensor. A characteristic voltage detector. The inspection according to claim 1, wherein the detector is foldably attached to the main body portion, and the contact between the detector and the voltage detection object is detected by a sensor when the detector bends with respect to the main body portion. Electroscope. The voltage detector according to claim 1 or 2, wherein the non-charged state of the voltage detection object can be notified by the light emission of a lamp provided in the main body and the sound of a buzzer.

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