CN211086555U - Electric leakage detection device of electric equipment - Google Patents

Abstract

A leakage detection device for electrical equipment belongs to the technical field of leakage detection. It is characterized in that: it comprises a plurality of independent discharge chambers (4) in the discharge box (1), a set of discharge needles (2) arranged oppositely are arranged in the discharge chamber (4), and the two sets of discharge needles (2) are respectively connected to The electrical equipment and grounding form a discharge gap between the two discharge needles (2); a trigger box (5) is also provided, a trigger circuit is arranged in the trigger box (5), and the discharge needle (2) is in the discharge gap. The signal generated by the discharge is connected into the trigger box (5), and passes through the trigger circuit in the trigger box (5), and alarms through the trigger circuit. In the leakage detection device of the electrical equipment, the signal is connected to the trigger circuit by using the characteristics of the signal generated when the tip is discharged, and the signal generated by the tip discharge is detected and alarmed through the trigger circuit, so as to realize the leakage of the electrical equipment. detection.

Description

A leakage detection device for electrical equipment

technical field

A leakage detection device for electrical equipment belongs to the technical field of leakage detection.

Background technique

During the use of electrical equipment due to poor grounding or other faults, the equipment may have leakage. After the equipment has leakage, a large amount of electric charge will accumulate on the equipment shell, especially the sharp parts and corners of the shell surface. After the equipment leaks, its discharge position is not easy to detect. Therefore, when the human body is close to the equipment, it is easy to receive electric shock. When there is flammable gas around the electrical equipment, the flammable gas is easy to burn or even explode under the action of the electric charge. Therefore, it is an urgent problem to be solved in the art to design a solution that can detect the leakage of electrical equipment so as to eliminate the potential safety hazard in time.

SUMMARY OF THE INVENTION

The technical problem to be solved by the utility model is: to overcome the deficiencies of the prior art, to provide a leakage detection device for electrical equipment, which utilizes the characteristic of generating a signal when the tip is discharged to connect the signal into the trigger circuit, and the trigger circuit detects the leakage of electricity. The signal generated by the tip discharge is detected and alarmed, and the leakage detection of the electrical equipment is realized.

The technical solution adopted by the utility model to solve the technical problem is: the leakage detection device of the electrical equipment is characterized in that: it includes a discharge box, a plurality of independent discharge chambers are arranged in the discharge box, and a discharge chamber is arranged with A set of discharge needles arranged oppositely, one of the discharge needles is connected to the electrical equipment after being pulled out from the discharge chamber, and the other is grounded after being pulled out from the discharge chamber, and a discharge gap is formed between the two discharge needles, and the discharge needle is at the discharge gap. The discharge generates a discharge signal, and the discharge signal is drawn from the discharge chamber and alarms.

Preferably, a trigger box is arranged on one side of the discharge box, the trigger box and the discharge box are integrally arranged, a trigger circuit is arranged in the trigger box, and the discharge signal is connected to the trigger circuit in the trigger box , and alarm by triggering the circuit.

Preferably, the discharge box is made of metal material, the discharge box and the discharge needle are insulated from each other, and the discharge box is attached to the surface of the electrical equipment through a magnet.

Preferably, in the discharge chamber, the distances of the discharge gaps formed by the discharge needles are different; a plurality of trigger boxes are arranged and correspond to the discharge chambers one by one.

Preferably, the trigger circuit in the trigger box is an optical trigger circuit, and the optical trigger circuit includes a photosensitive element and an alarm device triggered by the photosensitive element; the optical signal generated by the discharge needle at the discharge gap is transmitted through the optical fiber and connected to the optical trigger circuit middle;

The discharge chamber of the discharge box is filled with neon gas to form neon bubbles in the discharge chamber.

Preferably, the discharge box is made of transparent material, and an opaque outer casing is sheathed outside the discharge box, and the end of the optical fiber is located between the discharge and the outer casing after passing through the outer casing.

Preferably, the trigger circuit in the trigger box is an electromagnetic trigger circuit, and the induction signal generated by the discharge needle at the discharge gap is connected to the electromagnetic trigger circuit through the electromagnetic induction element;

The electromagnetic induction element is an induction coil or a Hall sensor, and the Hall sensor is placed in the discharge chamber; the induction coil is fixed in the discharge chamber or wound outside the discharge box.

Preferably, the trigger circuit in the trigger box is a temperature trigger circuit, and the temperature signal generated by the discharge needle at the discharge gap is connected to the electromagnetic trigger circuit through a temperature sensor;

The trigger circuit in the trigger box may be a sound trigger circuit, and the temperature signal generated by the discharge needle at the discharge gap is connected to the electromagnetic trigger circuit through the sound sensor.

Preferably, the discharge chamber is made of transparent material, and a reflector is arranged in the discharge chamber, and the reflector reflects the light signal generated by the discharge needle at the discharge gap to the outside of the discharge chamber.

Preferably, an optical fiber is placed in the discharge cavity, the light signal generated by the discharge needle at the discharge gap is transmitted to the outside of the discharge cavity through the optical fiber, and a convex lens for amplifying the light spot is provided at the light output end of the optical fiber.

Compared with the prior art, the beneficial effects that the utility model has are:

1. In the leakage detection device of this electrical equipment, the signal is connected to the trigger circuit by using the characteristics of the signal generated when the tip is discharged, and the signal generated by the tip discharge is detected and alarmed through the trigger circuit, which realizes the detection of the electrical equipment. leakage detection.

2. The discharge box can be directly fixed on the surface of the electrical equipment, which simplifies the structural complexity.

3. The discharge box is made of opaque material, which is conducive to the transmission and detection of optical signals.

4. Photosensitive devices can be realized by photodiodes, phototransistors and photoresistors, and have a wider range of applications.

5. In the power transmission and transformation system, when the zero line and the grounding line are short-circuited, an electrical signal will be generated between the zero line and the grounding line. The technical solution of this application can also be connected to the zero line and the grounding line of the power transmission and transformation system. In between, the short circuit between the neutral line and the ground line is detected.

Description of drawings

FIG. 1 is a schematic structural diagram of Embodiment 1 of a leakage detection device for electrical equipment.

FIG. 2 is a schematic structural diagram of Embodiment 2 of a leakage detection device for electrical equipment.

FIG. 3 is a schematic structural diagram of Embodiment 3 of a leakage detection device for electrical equipment.

FIG. 4 is a schematic structural diagram of Embodiment 4 of a leakage detection device for electrical equipment.

FIG. 5 is a schematic structural diagram of Embodiment 5 of a leakage detection device for electrical equipment.

FIG. 6 is a schematic structural diagram of Embodiment 6 of a leakage detection device for electrical equipment.

FIG. 7 is a schematic structural diagram of Embodiment 8 of the leakage detection device for electrical equipment.

FIG. 8 is a schematic structural diagram of Embodiment 11 of a leakage detection device for electrical equipment.

FIG. 9 is a schematic structural diagram of Embodiment 18 of a leakage detection device for electrical equipment.

FIG. 10 is a schematic structural diagram of Embodiment 20 of a leakage detection device for electrical equipment.

FIG. 11 is a schematic structural diagram of Embodiment 21 of a leakage detection device for electrical equipment.

Among them: 1, discharge box 2, discharge needle 3, optical fiber 4, discharge cavity 5, trigger box 6, magnet 7, wire 8, induction coil 9, glass plate 10, outer casing.

Detailed ways

FIG. 1 is a preferred embodiment of the present utility model, and the present utility model will be further described below in conjunction with accompanying drawings 1 to 11 .

Example 1:

As shown in FIG. 1 , a leakage detection device for electrical equipment includes a discharge box 1 and a trigger box 5 . A plurality of independent discharge chambers 4 are formed at intervals in the discharge box 1, and two discharge needles 2 are fixed in each discharge chamber 4. The two discharge needles 2 enter from two sides of the discharge chamber 4 respectively, and the two discharge needles The tips of the two discharge needles 2 are arranged opposite to each other in the discharge chamber 4 , and a discharge gap is formed between the tips of the two discharge needles 2 .

One of the two discharge needles 2 arranged opposite to each other in each discharge chamber 4 is connected to the leakage detection point of the electrical equipment (not shown in the figure). The discharge needle 2 can be installed at different leakage detection points of the electrical equipment. The other discharge needles 2 in all discharge chambers 4 are grounded at the same time.

An optical fiber 3 is arranged in each discharge cavity 4 , and the optical fiber 3 is facing the discharge gap between the discharge needles 2 . A trigger box 5 is arranged outside the discharge box 1 , and a light trigger circuit is arranged in the trigger box 5 . The optical fiber 3 can be realized by using a commercially available common glass optical fiber or a plastic optical fiber.

In this embodiment, the light trigger circuit in the trigger box 5 is realized by a phototransistor, the collector of the phototransistor is connected to the power supply Vcc and the output terminal OUT at the same time, and the output terminal OUT is connected to the input terminal of the external single-chip microcomputer (not shown in the figure), The emitter of the phototransistor is grounded, and all the optical fibers 3 face the light receiving end of the phototransistor. When the optical fiber 3 does not emit an optical signal, the phototransistor is turned off. When the optical fiber 3 emits an optical signal, the phototransistor is turned on. Therefore, the signal level sent by the single-chip microcomputer through the output OUT phase changes, and the single-chip microcomputer drives the sound and light according to different level changes. The alarm device alarms.

It should be pointed out again that: the single-chip microcomputer directly drives the light bulb or/and the buzzer to perform acousto-optic alarm according to the level change of its input, or indirectly drives the light bulb or/and the buzzer to perform the sound and light alarm by driving the relay. It is well known in the art. Common sense and routine means of those of ordinary skill in the art do not need to be implemented by means of a specific software program.

The specific working process and working principle are as follows:

The discharge needles 2 in different discharge chambers 4 are connected to different leakage detection points of the electrical equipment, and the discharge needle 2 at the other end of the discharge chamber 4 is grounded. When the electrical equipment leaks, the discharge charge will enter the discharge chamber through the discharge needle 2 4 in. After the discharge charge enters the discharge chamber 4, a tip discharge phenomenon will occur between the discharge gaps. After the tip discharge phenomenon occurs, electro-optical light will be generated. All are dark environments, so after the electro-optical light appears in the discharge chamber 4 due to the discharge, the optical fiber 3 facing the discharge gap will transmit the light signal to the trigger box 5 and trigger the internal light trigger circuit.

After the optical circuit is triggered, the level signal at the input end of the external controller (MCU) changes, and the single-chip microcomputer drives the sound and light alarm device to give an alarm, indicating that the equipment has leakage, so that the staff can check it together.

Example 2:

The difference between this embodiment and Embodiment 1 is that the circuit structure of the optical trigger circuit is different. As shown in FIG. 2 , in this embodiment, the light trigger circuit is replaced by a phototransistor, a photodiode and a common NPN type triode, and the triggering principle is the same as that of the first embodiment.

Example 3:

The difference between this embodiment and Embodiment 1 is that the circuit structure of the optical trigger circuit is different. As shown in FIG. 3 , in this embodiment, the external single-chip microcomputer is omitted, and a light bulb is provided, and the light bulb is connected in series between the power supply Vcc and the collector of the phototransistor. When the phototransistor is triggered by the light signal, the power supply circuit of the bulb is connected to drive the bulb to emit light. Bulbs can also be replaced by buzzers, and bulbs and buzzers can be set at the same time.

Example 4:

The difference between this embodiment and Embodiment 1 is: as shown in FIG. 4 , in this embodiment, a plurality of trigger boxes 5 are provided, and the number of trigger boxes 5 corresponds to the number of discharge chambers 4 one-to-one. The lead-out optical fiber 3 is connected to the corresponding trigger box 5 .

In this embodiment, the distances of the discharge gaps formed by the discharge needles 2 in each discharge chamber 4 are different, so the higher the discharge voltage is, the more distant discharge gaps will be broken down and discharged. When the discharge is detected, the voltage level of the discharge is indirectly judged.

Example 5:

The difference between this embodiment and Embodiment 1 is: as shown in FIG. 5 , the discharge needles 2 in the discharge chamber 4 are connected to one place to form two groups, one of which is connected to a leakage detection point of the electrical equipment, The other set of discharge pins 2 are grounded.

Example 6:

The difference between this embodiment and Embodiment 4 is that the trigger box 5 is omitted. As shown in FIG. 6 , the trigger box 5 is omitted in this embodiment, and the light trigger circuit in the trigger box 5 is directly placed in each discharge cavity 4 Inside.

Example 7:

The difference between this embodiment and Embodiment 1 is that the circuit structure of the optical trigger circuit is different. In this embodiment, other photosensitive elements are used to form a light trigger circuit, such as a photoresistor.

Example 8:

The difference between this embodiment and Embodiment 1 is: as shown in FIG.

Example 9:

The difference between this embodiment and Embodiment 1 is that: in this embodiment, the discharge chamber 4 is sealed and filled with neon gas, so each discharge chamber 4 forms a neon bubble. The discharge needle 2 discharges and excites the neon bulb to emit light.

Example 10:

The difference between this embodiment and Embodiment 1 is that: in this embodiment, a positioning module connected to the microprocessor is provided, and the electrical equipment can be positioned through the mature GPS, Beidou and other positioning technologies in the field, and can be The wireless transmitter module transmits the positioning coordinates through conventional communication technologies such as GPRS, so it is convenient to locate the location of the electrical equipment when the electrical equipment leaks.

Example 11:

The difference between this embodiment and Embodiment 8 is: as shown in FIG. 8 , in this embodiment, the discharge box 1 is made of metal material, and any end face of the discharge box 1 is provided with a plurality of grooves, and each Magnets 6 are respectively placed in the grooves, and the discharge box 1 (and the trigger box 5 ) are fixed on the surface of the electrical equipment through the magnets 6 . Since the discharge box 1 is made of metal, if the electrical equipment leaks, the leakage current is collected through the shell of the discharge box 1 and discharged through the discharge needle 2 . In this embodiment, when the discharge needle 2 passes through the casing of the discharge box 1 , an insulating layer is provided between the discharge needle 2 and the discharge box 1 .

Example 12:

The difference between this embodiment and Embodiment 8 is: in this embodiment, after the optical fiber 3 is drawn out from the discharge box 1, it is not connected to the optical trigger circuit in the trigger box 5, but a magnifying glass is provided at the output end of the optical fiber 3, and the optical fiber 3 is not connected to the optical trigger circuit. The light spot is enlarged to play a warning role.

Example 13:

The difference between this embodiment and Embodiment 11 is that: in this embodiment, in addition to the bonding surface of the discharge box 1 with the electrical equipment, at least one of the other five end surfaces is made of transparent material, and the discharge box 1 A mirror surface is arranged on the inner side. When a discharge phenomenon occurs in the discharge box 1, the light is reflected to the outside through the mirror surface, which acts as a warning.

Example 14:

The difference between this embodiment and Embodiment 1 is that: in this embodiment, the sound signal generated by the tip discharge is used to detect the leakage current, the optical fiber 3 is removed in the discharge chamber 4, and a sound sensor is placed in the discharge chamber 4, and the sound The signal line of the sensor is led out from the discharge chamber 4 and connected with the microprocessor in the trigger box 5 . When the electrical equipment produces sound due to tip discharge, the sound sensor sends a signal to the microprocessor, and the microprocessor drives the alarm to give an alarm.

Example 15:

The difference between this embodiment and Embodiment 1 is that in this embodiment, the sound signal generated by the tip discharge is used to detect the leakage current, the optical fiber 3 is removed in the discharge chamber 4, and a Hall sensor is placed in the discharge chamber 4, and the The signal line of the Hall sensor is led out from the discharge chamber 4 and connected with the microprocessor in the trigger box 5 . When the electrical equipment is discharged due to the tip, the surrounding magnetic field changes, the Hall sensor sends a signal to the microprocessor, and the microprocessor drives the alarm to give an alarm.

Example 16:

The difference between this embodiment and Embodiment 1 is that: in this embodiment, the temperature signal generated by the tip discharge is used to detect the leakage current, the optical fiber 3 is removed in the discharge chamber 4, and a temperature sensor is placed in the discharge chamber 4, and the temperature The signal line of the sensor is led out from the discharge chamber 4 and connected with the microprocessor in the trigger box 5 . When the electrical equipment is discharged due to the tip, its surrounding temperature changes, the temperature sensor sends a signal to the microprocessor, and the microprocessor drives the alarm to give an alarm.

Example 17:

The difference between this embodiment and Embodiment 1 is that in this embodiment, the tip of the discharge needle 2 can take other forms, such as a spherical surface, a circular tube end face, a circular ring, a straight blade, a cross blade, a polygonal blade, a cylindrical surface, an edge, etc. .

Example 18:

The difference between this embodiment and Embodiment 1 is: as shown in FIG. 9 , in this embodiment, a support rod is arranged in each discharge cavity 4 , and a wire is wound on the support rod to form an induction coil 8 . One end is drawn out through a wire 7 passing through the discharge box 1 , and the other end is connected to the corresponding discharge pin 2 to achieve grounding. The wire 7 leads out one end of the induction coil 8 and then connects with the microprocessor in the trigger box 5 (not shown in the figure). When the electrical equipment is discharged due to the tip, an electromagnetic signal is generated in the discharge chamber 4, and the induction signal is induced by the induction coil 8 to send a signal to the microprocessor, and the microprocessor drives the alarm to give an alarm.

Example 19:

The difference between this embodiment and Embodiment 18 is that the induction coil 8 is not separately arranged in each discharge cavity 4 , but is integrally wound outside the discharge box 1 .

Example 20:

The difference between this embodiment and Embodiment 1 is: as shown in FIG. 10 , in this embodiment, a glass plate 9 is arranged in the discharge chamber 4 , and the glass plate 9 isolates the optical fiber 3 from the discharge gap to avoid the discharge The high temperature causes damage to the optical fiber 3 . The glass plate can also be realized by a glass cover, which is fixed on the inner wall of the discharge chamber 4 and covers the optical fiber 3 therein.

Example 21:

The difference between this embodiment and Embodiment 9 is: as shown in FIG. 11 , the discharge box 1 is made of transparent materials such as glass, so the bright light emitted by the neon bubbles formed by each discharge chamber 4 will pass through the discharge box 1 and Radiated to the outside of the discharge box 1 . An outer casing 10 is sleeved outside the discharge box 1 , the outer casing 10 is made of an opaque material, and the optical fiber 3 only passes through the outer casing 10 and is located between the discharge box 1 and the outer casing 10 . When leakage occurs, the discharge needle 2 discharges and excites the entire discharge box 1 to emit light.

The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention in other forms. Any person skilled in the art may use the technical content disclosed above to change or remodel to equivalent changes. Equivalent Example. However, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solutions of the present invention still belong to the protection scope of the technical solutions of the present invention.

Claims (10)

1. A leakage detection device for electrical equipment, characterized in that it comprises a discharge box (1), a plurality of independent discharge chambers (4) are arranged in the discharge box (1), and a plurality of independent discharge chambers (4) are arranged in the discharge chamber (4). There is a set of oppositely arranged discharge needles (2), one of the discharge needles (2) is connected to the electrical equipment after being drawn out from the discharge chamber (4), and the other is grounded after being drawn out from the discharge chamber (4). (2) The interval between them forms a discharge gap, the discharge needle (2) discharges at the discharge gap to generate a discharge signal, and the discharge signal is led out from the discharge chamber (4) to give an alarm. 2 . The leakage detection device for electrical equipment according to claim 1 , wherein a trigger box ( 5 ) is arranged on one side of the discharge box ( 1 ), and the trigger box ( 5 ) is connected to the discharge box ( 1 ). 3 . The box (1) is integrally arranged, a trigger circuit is arranged in the trigger box (5), the discharge signal is connected to the trigger circuit in the trigger box (5), and an alarm is issued through the trigger circuit. 3 . The leakage detection device for electrical equipment according to claim 1 , wherein the discharge box ( 1 ) is made of metal, and the discharge box ( 1 ) and the discharge needle ( 2 ) are insulated from each other, and the discharge box ( 1 ) is insulated from each other. 4 . The box (1) is attached to the surface of the electrical equipment through the magnet (6). 4. The leakage detection device for electrical equipment according to claim 1, characterized in that: in the discharge chamber (4), the distances of the discharge gaps formed by the discharge needles (2) are different; the trigger box ( 5) There are a plurality of them and they are in one-to-one correspondence with the discharge chambers (4). 5 . The leakage detection device for electrical equipment according to claim 2 , wherein the trigger circuit in the trigger box ( 5 ) is an optical trigger circuit, and the optical trigger circuit includes a photosensitive element and an alarm triggered by the photosensitive element. 6 . The device; the optical signal generated by the discharge needle (2) at the discharge gap is transmitted and connected to the optical trigger circuit through the optical fiber (3); The discharge chamber (4) of the discharge box (1) is filled with neon gas, so that the discharge chamber (4) forms a neon bubble. 6 . The leakage detection device for electrical equipment according to claim 5 , wherein the discharge box ( 1 ) is made of transparent material, and an opaque outer casing ( 10 ) is sheathed on the outside of the discharge box ( 1 ). The end of (3) passes through the outer casing (10) and is located between the discharge box (1) and the outer casing (10). 7 . The leakage detection device for electrical equipment according to claim 2 , characterized in that: the trigger circuit in the trigger box ( 5 ) is an electromagnetic trigger circuit, and the discharge needle ( 2 ) discharges the induction generated by the discharge gap. 8 . The signal is connected to the electromagnetic trigger circuit through the electromagnetic induction element; The electromagnetic induction element is an induction coil (8) or a Hall sensor, and the Hall sensor is placed in the discharge chamber (4); the induction coil (8) is fixed in the discharge chamber (4) or wound outside the discharge box (1). 8 . The leakage detection device for electrical equipment according to claim 2 , wherein the trigger circuit in the trigger box ( 5 ) is a temperature trigger circuit, and the discharge needle ( 2 ) discharges the temperature generated at the discharge gap. 9 . The signal is connected to the electromagnetic trigger circuit through the temperature sensor; The trigger circuit in the trigger box (5) may be a sound trigger circuit, and the temperature signal generated by the discharge needle (2) at the discharge gap is connected to the electromagnetic trigger circuit through the sound sensor. 9 . The leakage detection device for electrical equipment according to claim 1 , wherein the discharge chamber ( 4 ) is made of transparent material, and a reflector is arranged in the discharge chamber ( 4 ), and the reflector reflects the discharge needle. 10 . (2) The optical signal generated by the discharge at the discharge gap is reflected to the outside of the discharge cavity (4). 10 . The leakage detection device for electrical equipment according to claim 1 , characterized in that: an optical fiber ( 3 ) is placed in the discharge cavity ( 4 ), and the discharge needle ( 2 ) discharges light generated at the discharge gap. 11 . The signal is transmitted to the outside of the discharge cavity (4) through the optical fiber (3), and a convex lens for amplifying the light spot is arranged at the light output end of the optical fiber (3).

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