WO2020098111A1

WO2020098111A1 - Mine radar level monitoring device

Info

Publication number: WO2020098111A1
Application number: PCT/CN2018/124868
Authority: WO
Inventors: 李臣华; 渠慎月; 韩迪; 张昌伟; 吴旭旭
Original assignee: 徐州江煤科技有限公司
Priority date: 2018-11-14
Filing date: 2018-12-28
Publication date: 2020-05-22
Also published as: CN109186716A

Abstract

Disclosed is a mine radar level monitoring device, comprising a mine intrinsically-safe radar level sensor for detecting the level of a coal bin in real time, mine intrinsically-safe radar level display boxes for receiving and processing a signal detected by the mine intrinsically-safe radar level sensor, and mine flameproof intrinsically-safe direct-current voltage-stabilized power supplies, the mine intrinsically-safe radar level sensor being mounted above the coal bin; the mine intrinsically-safe radar level display boxes each comprise a box body, a box cover mounted on the box body, a main board mounted in the box body, and a display window mounted on the box cover, a first waterproof joint and a fifth waterproof joint respectively being mounted on the left side and right side of the box body, and a second waterproof joint, a third waterproof joint, and a fourth waterproof joint being mounted on the front side of the box body sequentially from the left to the right. The present invention improves the accuracy of dynamic detection of the level of a coal bin, and has good flameproof performance.

Description

Mine radar level monitoring device

Technical field

The invention relates to a mine radar level monitoring device, which belongs to the technical field of mine monitoring.

Background technique

With the continuous improvement of the automation level of the coal industry, how to accurately understand and control the storage conditions of underground silos (coal silos, water silos, etc.) at any time is becoming more and more important in efficient production and automated management. The coal bunker (material bunker) is an indispensable important buffer link in the coal mine production and transportation system. It is also an important technical means to ensure the continuous transportation of the transportation system and improve production efficiency. Therefore, the development of a device suitable for underground mine level monitoring has important practical significance for improving the production efficiency and management level of the mine. At present, some level monitoring devices for underground coal mines have appeared on the market, but there are the following problems in the actual use process: the existing monitoring devices are explosion-proof because there are explosive dangerous substances such as methane and coal dust underground in coal mines The performance needs to be improved; the dynamic detection accuracy of the coal bunker coal level is poor; the function is single.

Summary of the invention

In view of the above problems in the prior art, the present invention provides a mine radar level monitoring device, which can improve the accuracy of the dynamic detection of the coal bunker coal level and has high explosion-proof performance.

In order to achieve the above object, the present invention adopts the following technical solution: a mine radar level monitoring device, including a mine intrinsic safety radar level sensor for real-time detection of coal bunker coal level, used for mine intrinsic safety Mine intrinsically safe radar level display box for receiving and processing signals detected by radar level sensor and mine flameproof and intrinsically safe DC stabilized power supply, the mine intrinsically safe radar level sensor is installed in coal bunker Above, the mine intrinsically safe radar level sensor is connected to the mine intrinsically safe radar level display box, and the mine intrinsically safe radar level display box is connected to the mine explosion-proof and intrinsically safe DC stabilized power supply The mine intrinsically safe radar level display box includes a box, a box cover installed on the box, a main board installed in the box, and a display window installed on the box cover. The left and right sides of the box are respectively A first waterproof connector for connecting to the power supply and a fifth waterproof connector for outputting the low-limit control signal are installed, and a second waterproof connector for connecting the sensor is installed in order from the left to the right of the front side of the box, for output frequency, A third waterproof connector for current or digital signals and a fourth waterproof connector for outputting high limit control signals.

Preferably, the mine intrinsically safe radar level sensor is GUL70 mine intrinsically safe radar level sensor, the mine intrinsically safe radar level display box is KXU18 mine intrinsically safe radar level display box, the mine The explosion-proof and intrinsically safe DC regulated power supply is KDW127 / 18B mine explosion-proof and intrinsically safe DC stabilized power supply.

Preferably, a current signal transmission of 4-20 mA is used between the mine intrinsically safe radar level sensor and the mine intrinsically safe radar level display box.

Preferably, the number of the mine intrinsically safe radar level display box and the mine flameproof and intrinsically safe DC stabilized voltage power supply are both two, two mine intrinsically safe radar level display boxes and two mine use The explosion-proof and intrinsically safe DC stabilized power supply is connected one to one; the two mine intrinsically safe radar level display boxes are transmitted through RS485.

Preferably, a four-digit LED digital tube and two LED indicators arranged above and below the right end of the LED digital tube are installed in the mine intrinsically safe radar level display box directly opposite the display window.

Preferably, it further includes a rubber pad and an iron pad, the rubber pad is arranged between the display window and the box cover, the iron pad is arranged on a side of the display window away from the box cover, the box cover, the rubber pad, The display window and the iron pad are connected by a bolt assembly.

Preferably, a nameplate, a MA logo and an EX logo are installed on the box cover, a handle is installed on the rear side of the box body, and the box cover is connected to the box body through a hinge.

Preferably, the mine intrinsically safe radar level sensor includes an instrument box, an instrument seat installed in the instrument box, an instrument installed on the instrument seat, an instrument cover installed on the instrument box, an antenna, a fixing plate, a pressure plate, A trumpet and a cable terminal installed on the instrument box. One end of the antenna is connected to the meter, and the other end is connected to the pressure plate through a fixing plate; the trumpet is installed on the side of the pressure plate away from the fixing plate.

Compared with the existing technology, the present invention adopts mine intrinsically safe radar level sensor, mine intrinsically safe radar level display box and mine explosion-proof and intrinsically safe DC stabilized power supply for coal bunker coal level detection , All components are suitable for the harsh working environment of the mine, and high explosion-proof; at the same time, the mine intrinsically safe radar level sensor relies on the antenna to emit a very narrow microwave pulse. Part of the energy is reflected back and received by the same antenna. The time interval between the transmission pulse and the reception pulse is proportional to the distance between the antenna and the surface of the measured medium, and the time interval between the transmission pulse and the reception pulse can be accurately identified, thereby further calculating the distance between the antenna and the surface of the measured medium. In addition, the measurement signal of the mine intrinsic safety level sensor is sent to the mine intrinsic safety radar level display box to realize the monitoring of the coal level of a single coal bunker; the signal can also be sent to the mine monitoring system to realize the coal bunker Coal level monitoring, full-bin stop input belt conveyor and audible and visual alarm, empty bin stop output belt conveyor and audible and visual alarm, provide technical support for the realization of automatic control of the mine. The whole device can be used in coal and other industries where there is an explosive danger, and the non-contact automatic continuous detection of the material level of the granule, block, liquid and other material silos.

BRIEF DESCRIPTION

Figure 1 is a schematic diagram of the principle of the present invention;

FIG. 2 is a schematic diagram of the mine intrinsic safety radar level display box of the present invention;

Figure 3 is a top view of Figure 2;

Figure 4 is a right side view of Figure 2;

5 is a schematic diagram of the mine intrinsic safety radar level sensor of the present invention;

Fig. 6 is a right side view of Fig. 5.

detailed description

The technical solutions in the implementation of the present invention will be clearly and completely described below with reference to the drawings. The described embodiments are only a part of the embodiments of the present invention, but not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

As shown in FIGS. 1 to 6, a mine radar level monitoring device provided by an embodiment of the present invention includes a mine intrinsically safe radar level sensor 1 for real-time detection of coal bunker coal level. Mine intrinsically safe radar level sensor 1 receives and processes signals detected by mine intrinsically safe radar level display box 2 and mine explosion-proof and intrinsically safe DC stabilized power supply 3, said mine intrinsically safe radar The level sensor 1 is installed above the coal bunker, the mine intrinsic safety radar level sensor 1 is connected to the mine intrinsic safety radar level display box 2, and the mine intrinsic safety radar level display box 2 is connected to the mine Flameproof and intrinsically safe DC stabilized power supply 3 is connected; the mine intrinsically safe radar level display box 2 includes a box 22, a box cover 21 installed on the box 22, and a main board 28 installed in the box 22 And a display window 213 installed on the box cover 21, the left and right sides of the box body 22 are respectively installed with a first waterproof connector for connecting to a power supply and a fifth waterproof connector for outputting a low limit control signal. From the left to the right, a second waterproof connector for connecting a sensor, a third waterproof connector for outputting a frequency, current or digital signal, and a fourth waterproof connector for outputting a high limit control signal are installed in order from left to right. Among them, the main board 28 may include a power conversion circuit, a display circuit, a single-chip processing circuit and an input and output circuit; the main function of the display box is to detect the distance from the radar level sensor to the material surface, and the single-chip processing circuit calculates the material level and other parameters, It outputs analog signals and high and low signals of relay contacts, and at the same time digitally displays the measured data (the empty space distance or material height can be displayed by setting), and the output signal can only be the level value output. Mine intrinsic safety radar level sensor 1 realizes real-time detection of coal bunker coal level, and transmits the detection result to mine intrinsic safety radar level display box 2 in real time.

Preferably, the mine intrinsically safe radar level sensor 1 is a GUL70 mine intrinsically safe radar level sensor, and the mine intrinsically safe radar level display box 2 is a KXU18 mine intrinsically safe radar level display box. The mine flameproof and intrinsically safe DC stabilized power supply 3 is KDW127 / 18B mine flameproof and intrinsically safe DC stabilized power supply.

Preferably, a current signal transmission of 4-20 mA is used between the mine intrinsically safe radar level sensor 1 and the mine intrinsically safe radar level display box 2.

Preferably, the number of the mine intrinsically safe radar level display box 2 and the mine flameproof and intrinsically safe DC stabilized power supply 3 are both two, and the two mine intrinsically safe radar level display boxes 2 and two A mine flameproof and intrinsically safe DC stabilized power supply 3 is connected one to one; two mine intrinsically safe radar level display boxes 2 are transmitted via RS485.

Preferably, a four-digit LED digital tube and two LED indicators arranged above and below the right end of the LED digital tube are installed in the position of the mine intrinsically safe radar level display box 2 directly opposite the display window 213. When working, the three LED digital tubes on the right display the material level, and the first LED digital tube on the left displays the air height or material height code; the two LED indicators are used for over-limit status indication: the upper light is on to indicate the high limit control output, The lower light is on to indicate the low limit control output.

Preferably, it further includes a rubber pad 212 and an iron pad 211, the rubber pad 212 is arranged between the display window 213 and the box cover 21, the iron pad 211 is arranged on the side of the display window 213 away from the box cover 21, The box cover 21, the rubber pad 212, the display window 213 and the iron pad 211 are connected by a bolt assembly.

Preferably, a nameplate 26, an MA sign 27 and an EX sign 25 are installed on the box lid 21, a handle 23 is installed on the rear side of the box 22, and the box lid 21 is connected to the box 22 through a hinge 24 .

Preferably, the mine intrinsically safe radar level sensor 1 includes an instrument box 14, an instrument base 13 installed in the instrument box 14, an instrument 12 installed on the instrument base 13, and an instrument cover 11 installed on the instrument box 14 , Antenna 15, fixed plate 16, pressure plate 17, horn 18 and cable terminal 19 installed on the instrument box 14, one end of the antenna 15 is connected to the instrument 12, the other end is connected to the pressure plate 17 through the fixed plate 16; The horn 18 is installed on the side of the pressing plate 17 away from the fixing plate 16. Considering that the antenna emits microwave pulses, there is a certain emission angle. From the lower edge of the antenna to the surface of the measured medium, there must be no obstacles in the area radiated by the emitted microwave beam, so the installation should be avoided as much as possible. The facilities and coal falling in the warehouse; at the same time, the highest material level must not enter the measurement blind area; the sensor must be kept at a certain distance from the warehouse wall (greater than 500mm), and its installation should be as vertical as possible to the antenna emission and the surface of the measured medium The installation inclination does not exceed 15 °), so it can be installed vertically above the coal bunker.

When in use, you can install each component according to the above requirements, first check whether the wiring is correct and reliable, and you can turn on the power after making sure that it is correct. After the power is turned on, if the mine intrinsically safe radar level sensor 1 is connected to the mine intrinsically safe radar level display box 2, the change of coal level can be observed through the display window on the mine intrinsically safe radar level display box 2. . A level display box can be installed above and below the coal bunker to make it easier to observe changes in the coal level. Before installing and using a specific silo, the intrinsically safe radar level display box 2 of the mine must first determine the relevant parameters of the coal bunker and set the measurement data parameters, such as: setting the display empty height or material height, and the range (display box Measurement range), zero value (the blind zone of the radar level sensor, the default is 1m), high limit (the material height is greater than or equal to the value of the output control signal), low limit (the material height is less than or equal to the value of the output control signal) Wait. If equipped with two mine intrinsically safe radar level display boxes, the distance between the two mine intrinsically safe radar level display boxes should not exceed 1000m. And RS485 communication is used between the two mine intrinsic safety radar level display boxes. Local setting is "B" slave, remote setting is "A" master.

In summary, the various components used in the present invention are suitable for the harsh working environment of the mine and have high explosion-proof performance. At the same time, the mine intrinsically safe radar level sensor relies on the antenna to emit a very narrow microwave pulse. This pulse propagates in space at the speed of light. When it hits the surface of the measured medium, part of its energy is reflected back and received by the same antenna. The time interval between the transmission pulse and the reception pulse is proportional to the distance between the antenna and the surface of the measured medium, and the time interval between the transmission pulse and the reception pulse can be accurately identified, thereby further calculating the distance between the antenna and the surface of the measured medium. In addition, the measurement signal of the mine intrinsic safety level sensor is sent to the mine intrinsic safety radar level display box to realize the monitoring of the coal level of a single coal bunker; the signal can also be sent to the mine monitoring system to realize the coal bunker Coal level monitoring, full-bin stop input belt conveyor and audible and visual alarm, empty bin stop output belt conveyor and audible and visual alarm, provide technical support for the realization of automatic control of the mine. The whole device can be used in coal and other industries where there is an explosive danger, and the non-contact automatic continuous detection of the material level of the granule, block, liquid and other material silos. The invention has the real-time measurement function of the coal bunker coal level, realizes the dynamic measurement of the coal bunker coal level, and can set the output alarm when the coal bunker coal level is lower than the set lower limit value or higher than the set upper limit value control signal. As an important part of the automatic control of the mine transportation system, it can ensure the safe, efficient and reliable operation of the coal bunker.

It will be apparent 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 and basic characteristics of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the present invention is defined by the appended claims rather than the above description, and is therefore intended to fall within the claims All changes within the meaning and scope of the equivalent requirements are included in the present invention. Any reference signs in the claims should not be considered as limiting the claims involved.

In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only includes an independent technical solution. This description of the specification is for clarity only, and those skilled in the art should treat the specification as a whole. The technical solutions in the embodiments may also be combined appropriately to form other embodiments that can be understood by those skilled in the art.

Claims

A mine radar level monitoring device, characterized in that it includes a mine intrinsically safe radar level sensor (1) for real-time detection of coal bunker coal level, and a mine intrinsically safe radar level sensor (1) 1) Mine intrinsically safe radar level display box (2) for receiving and processing the detected signals and mine explosion-proof and intrinsically safe DC stabilized power supply (3), the mine intrinsically safe radar level sensor (1) Installed above the coal bunker, the mine intrinsic safety radar level sensor (1) is connected to the mine intrinsic safety radar level display box (2), and the mine intrinsic safety radar level display box ( 2) Connected to mine explosion-proof and intrinsically safe DC stabilized power supply (3); the mine intrinsically safe radar level display box (2) includes a box body (22), and is installed on the box body (22) The box cover (21), the main board (28) installed in the box body (22) and the display window (213) installed on the box cover (21), the left and right sides of the box body (22) are respectively installed for The first waterproof connector connected to the power supply and the fifth waterproof connector used to output the low-limit control signal. The front side of the box (22) is provided with a second waterproof connector for connecting the sensor in order from the left to the right, for output frequency, A third waterproof connector for current or digital signals and a fourth waterproof connector for outputting high limit control signals.
The mine radar level monitoring device according to claim 1, characterized in that the mine intrinsically safe radar level sensor (1) is a GUL70 mine intrinsically safe radar level sensor, the mine An radar level display box (2) is a KXU18 mine intrinsically safe radar level display box, and the mine explosion-proof and intrinsically safe DC stabilized power supply (3) is KDW127 / 18B mine explosion-proof and intrinsically safe type DC power supply.
The mine radar level monitoring device according to claim 1, characterized in that the mine intrinsic safety radar level sensor (1) and the mine intrinsic safety radar level display box (2) are used 4-20mA current signal transmission.
The mine radar level monitoring device according to claim 1, characterized in that the mine intrinsically safe radar level display box (2) and the mine explosion-proof and intrinsically safe DC stabilized power supply (3 ) The number is two, two mine intrinsically safe radar level display boxes (2) and two mine explosion-proof and intrinsically safe DC stabilized power supply (3) one to one connection; two mine intrinsic An radar level display box (2) is transmitted via RS485.
The mine radar level monitoring device according to claim 1, characterized in that a four-digit LED is installed in the position of the mine intrinsically safe radar level display box (2) directly opposite the display window (213) The nixie tube and two LED indicator lights arranged up and down on the right end of the LED nixie tube.
The mine radar level monitoring device according to claim 1, further comprising a rubber pad (212) and an iron pad (211), the rubber pad (212) is arranged in the display window (213) ) And the box cover (21), the iron pad (211) is arranged on the side of the display window (213) away from the box cover (21), the box cover (21), the rubber pad (212), the display window Bolt assembly is connected between (213) and iron pad (211).
A mine radar level monitoring device according to claim 1, characterized in that the nameplate (26), the MA sign (27) and the EX sign (25) are installed on the box cover (21), A handle (23) is installed on the rear side of the box body (22), and the box cover (21) is connected to the box body (22) through a hinge (24).
A mine radar level monitoring device according to claim 1, characterized in that the mine intrinsically safe radar level sensor (1) includes an instrument box (14), and an instrument box (14) installed in the instrument box (14) Instrument base (13), instrument (12) installed on the instrument base (13), instrument cover (11) installed on the instrument box (14), antenna (15), fixing plate (16), pressure plate (17) , A horn (18) and a cable terminal (19) installed on the instrument box (14), one end of the antenna (15) is connected to the instrument (12), and the other end is connected to the pressure plate (17) through the fixing plate (16) ) Connection; the horn (18) is installed on the side of the pressure plate (17) away from the fixed plate (16).