CN206195341U - Intelligent colliery direct current overhead line earthleakage protective equipment - Google Patents

Abstract

The utility model discloses an intelligent electric leakage protection device for direct current wiring in coal mines, which comprises a main body of the electric leakage protection device. Fixing pieces are installed around the main body of the electric leakage protection device. A single chip microcomputer and an internal circuit are installed inside the main body of the electric leakage protection device. The output end of the leakage protection device body is electrically connected to the input end of the three-phase AC contactor, the three-phase AC contactor is connected in series with the monitoring circuit, the monitoring circuit is connected in parallel with the leakage protection device body, and the leakage protection device body The output terminal of the monitoring circuit is electrically connected to the input terminal of the monitoring circuit, the monitoring circuit is connected in series with the current transformer, the monitoring circuit is connected in parallel with the voltage transformer, and the output terminals of the current transformer and the voltage transformer are connected to the leakage protection device body The input terminals are electrically connected. The utility model adopts the stm32 single-chip microcomputer through the single-chip microcomputer, which has high performance, low cost and low power consumption, improves the control accuracy and precision, and increases the intelligence of the system.

Description

An intelligent DC wire leakage protection device for coal mines

technical field

The utility model relates to the technical field of electric leakage protection devices, in particular to an intelligent electric leakage protection device for direct current wiring in coal mines.

Background technique

At present, DC trolley locomotive, as an important transportation tool in coal mines, is widely used in most coal mines at home and abroad. However, due to the narrow space underground in coal mines, the height of the DC wiring from the ground is generally about 2 m, and the ground is used as the negative pole of the power supply for the wiring, so people are prone to electric shock. In addition, the arc generated by leakage may also cause major accidents such as gas or coal dust explosion; excessive leakage current may also cause heating of insulating materials or cause short circuit between phases and cause fire. Therefore, it is very necessary to study the leakage protection of DC wiring in coal mines. The existing DC wiring leakage protection devices in coal mines have many defects, such as low control precision and accuracy, unable to realize power failure reminder, and unable to timely report power failure. The situation is notified to the monitoring room.

Utility model content

The purpose of this utility model is to provide an intelligent DC wire leakage protection device for coal mines to solve the problems of low control precision and accuracy, failure to realize power failure reminder and failure to notify the power failure situation to the Monitoring room problem.

In order to achieve the above purpose, the utility model provides the following technical solutions: an intelligent DC wire leakage protection device for coal mines, including a leakage protection device body, fixed pieces are installed around the leakage protection device body, and a leakage protection device body An alternating current interface is installed on the side, and a voice speaker, a liquid crystal display and a control panel are installed on the front surface of the leakage protection device body. A single-chip microcomputer and an internal circuit are installed inside, the output end of the leakage protection device body is electrically connected to the input end of the three-phase AC contactor, the three-phase AC contactor is connected in series with the monitoring circuit, and the monitoring circuit and the leakage protection device The body is connected in parallel, the output end of the leakage protection device body is electrically connected to the input end of the monitoring circuit, the monitoring circuit is connected in series with the current transformer, the monitoring circuit is connected in parallel with the voltage transformer, and the current transformer and the voltage transformer are connected in parallel. The output end of the device is electrically connected with the input end of the leakage protection device body.

Preferably, what described single-chip microcomputer adopted is stm32 single-chip microcomputer.

Preferably, a flashing alarm light is installed on the upper side of the earth leakage protection device body.

Preferably, a wireless signal transceiver is installed on the upper side of the leakage protection device body.

Compared with the prior art, the beneficial effect of the utility model is: the device adopts the stm32 single-chip microcomputer through the single-chip microcomputer, which has high performance, low cost and low power consumption, improves the accuracy and precision of the control, and increases the intelligence of the system , the flashing alarm light is installed on the upper side of the leakage protection device body, and the detected information can be sent to the single-chip microcomputer through the current transformer. Alarm, through the wireless signal transceiver installed on the upper side of the leakage protection device body, the detected information can be sent to the single-chip microcomputer in the current transformer, and the single-chip microcomputer controls the internal circuit to control the wireless signal transceiver to send leakage information after analyzing the leakage situation. It is convenient for remote monitoring in the monitoring room. The monitoring circuit adopts a bridge rectifier circuit, which can facilitate the detection of leakage, and at the same time converts direct current into alternating current for power supply.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the installation diagram of the utility model.

In the figure: 1-leakage protection device body; 2-internal circuit; 3-LCD display; 4-flashing alarm light; Start button; 10-voice speaker; 11-wireless signal transceiver; 12-single-chip microcomputer; 13-voltage transformer; 14-current transformer; 15-monitoring circuit; 16-three-phase AC contactor; 17-AC interface.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Please refer to Fig. 1 and Fig. 2, an embodiment provided by the utility model: an intelligent DC wire leakage protection device for coal mines, including a leakage protection device body 1, and a fixing piece 5 is installed around the leakage protection device body 1 to prevent leakage One side of the protection device body 1 is provided with an AC interface 17, and the front surface of the leakage protection device body 1 is provided with a voice speaker 10, a liquid crystal display screen 3 and a control panel 6, and the front surface of the control panel 6 is provided with a start button 9, a working indicator light 7 and Select the button 8, the leakage protection device body 1 is equipped with a single chip microcomputer 12 and the internal circuit 2, the output end of the leakage protection device body 1 is electrically connected to the input end of the three-phase AC contactor 16, and the three-phase AC contactor 16 and the monitoring circuit 15 in series, the monitoring circuit 15 is connected in parallel with the leakage protection device body 1, the output end of the leakage protection device body 1 is electrically connected to the input end of the monitoring circuit 15, the monitoring circuit 15 is connected in series with the current transformer 14, and the monitoring circuit 15 and the voltage transformer 13 in parallel, the output terminals of the current transformer 14 and the voltage transformer 13 are electrically connected to the input terminal of the leakage protection device body 1, the single-chip microcomputer 12 adopts a stm32 single-chip microcomputer, and the upper side of the leakage protection device body 1 is equipped with a flashing warning light 4, A wireless signal transceiver 11 is installed on the upper side of the leakage protection device body 1 .

Working principle: When in use, connect the AC power interface 17 on one side of the leakage protection device body 1 to other circuits, the monitoring circuit 15 can convert the DC power into AC power, and supply power to the equipment. The current transformer 14 can detect the current, and the current transformer 14 will The detected data is transmitted to the single-chip microcomputer 12 inside the leakage protection device body 1, and the single-chip microcomputer 12 analyzes the data. When there is a problem with the data, the single-chip microcomputer 12 will control the three-phase AC contactor 16 to perform power-off processing, and the single-chip microcomputer 12 will pass through the internal circuit 2 Control the flashing alarm lamp 4 to give an alarm, and send the information to the monitoring room through the wireless signal transceiver 11, and the voice speaker 10 broadcasts the information.

It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, no matter from all points of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, so it is intended to fall within the scope of the claims All changes within the meaning and range of equivalents of the required elements are included in the present invention. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (4)

1. a kind of intelligent colliery DC electric earth leakage protective device, including earth leakage protective device body（1）, it is characterised in that： The earth leakage protective device body（1）Surrounding is provided with stator（5）, the earth leakage protective device body（1）Side is provided with Exchange electrical interface（17）, the earth leakage protective device body（1）Preceding surface is provided with speech horn（10）, LCDs（3） And control panel（6）, the control panel（6）Preceding surface is provided with start button（9）, relay indicating light（7）And select button （8）, the earth leakage protective device body（1）Inside is provided with single-chip microcomputer（12）And internal circuit（2）, the earth leakage protective device Body（1）Output end and three-phase ac contactor（16）Input be electrically connected with, the three-phase ac contactor（16）With Observation circuit（15）Series connection, the observation circuit（15）With earth leakage protective device body（1）Parallel connection, the earth leakage protective device sheet Body（1）Output end and observation circuit（15）Input be electrically connected with, the observation circuit（15）Summation current transformer（14） Series connection, the observation circuit（15）And voltage transformer（13）Parallel connection, the current transformer（14）And voltage transformer（13） Output end and earth leakage protective device body（1）Input be electrically connected with.

2. a kind of intelligent colliery DC electric earth leakage protective device according to claim 1, it is characterised in that：The list Piece machine（12）Use stm32 single-chip microcomputers.

3. a kind of intelligent colliery DC electric earth leakage protective device according to claim 1, it is characterised in that：The leakage Electrical protective device body（1）Upside is provided with flicker alarm lamp（4）.

4. a kind of intelligent colliery DC electric earth leakage protective device according to claim 1, it is characterised in that：The leakage Electrical protective device body（1）Upside is provided with wireless signal transceiver（11）.