CN203412615U

CN203412615U - Coal mine return airway dust monitoring and collecting device

Info

Publication number: CN203412615U
Application number: CN201320410105.5U
Authority: CN
Inventors: 潘开方; 陈镜汉; 彭玉慧; 卢建波
Original assignee: CHONGQING FIND MACHINERY Co Ltd
Current assignee: Chongqing Feierda Ventilation Equipment Ltd By Share Ltd
Priority date: 2013-07-11
Filing date: 2013-07-11
Publication date: 2014-01-29
Anticipated expiration: 2023-07-11

Abstract

The utility model relates to the technical field of coal mine equipment and provides a coal mine return airway dust monitoring and collecting device comprising a dust monitoring unit and a dust collecting unit, wherein the dust monitoring unit comprises a dust sensor, an amplifying circuit, an A/D (Analog-to-Digital) converter and a single chip microcomputer which are sequentially connected, the amplifying circuit is used for amplifying a collected concentration signal, the A/D converter is used for carrying out analog-to-digital conversion on the concentration signal, and the single chip microcomputer is used as a data processing control unit and is connected with an LCD (Liquid Crystal Display) for displaying the digitized dust concentration, a buzzer alarm, an input keyboard for setting an alarm concentration value and an executing mechanism for starting and stopping a spraying device; and the dust collecting unit comprises the spraying device and a gauze screen, wherein the gauze screen is hung on a roof of a return airway and is covered on the section of the whole channel, and the spraying device is hung on the roof of the return airway and is used for spraying the gauze screen. By using the coal mine return airway dust monitoring and collecting device, the concentration of dust in operation places can be effectively monitored in time, the condition of the dust concentration can be better mastered, and the dust can be collected and descended effectively.

Description

A kind of coal mine return air lane dust control and dust arrester thereof

Technical field

The utility model relates to coal mine equipment technical field, and a kind of coal mine return air lane dust control and dust arrester thereof are provided.

Background technology

Along with the development of oil, gas industry and coal industry, the series of problems such as safety of coal mines, environment pollution just become

The emphasis that people pay close attention to, especially downhole powder dust concentration is high, and underground work personnel's physical and mental health has been caused to great threat.It is introduced, China's coal mines approximately 95% is well industrial and mineral, and mining conditions is complicated, and along with the depth of excavation increases, the disasters such as coal mine gas, flood, bump are more and more serious.Pit mining mine has that disaster factors is concentrated, personnel activity measures greatly, and breeze is not easy to get rid of in time multiple the coexist feature of down-hole of calamity factor that causes, also the easy large disaster of initiation.The pernicious gas producing in coal production, industrial production and daily life is carried out to high-sensitivity detection and become very important.

In the underground mining of colliery, by atomization mechanism, to measures such as digger spray sprinklers, can reduce most of dust, but still some static dust enters in return, make to contain dust in underground return air stream, affect personnel in the pit's health.

Summary of the invention

The purpose of this utility model is to provide a kind of can carry out a kind of coal mine return air lane dust control and the dust arrester thereof of dedusting in real time according to downhole powder dust concentration.

The utility model has adopted following technical scheme to achieve these goals:

Lane dust control and a dust arrester thereof, is characterized in that: comprise dust control unit and dust removing units,

Described dust control unit, comprise the dust sensor that is linked in sequence, for amplifying circuit that the concentration signal collecting is amplified, for concentration signal being carried out to analog-to-digital A/D converter, as the single-chip microcomputer of data processing and control unit, the input keyboard that described single-chip microcomputer is connected with LCD display for showing digitlization dust concentration, buzzer siren, arranges for alarm concentration value, for the executing agency of opening and closing spray equipment;

Described dust removing units comprises spray equipment and gauze, and described gauze is suspended on the top board of return aircourse, and covers the section of whole passage, and spray equipment is suspended on the top board of return aircourse and sprays to gauze.

Described gauze is at least 3 layers.

The aperture of described gauze is at 0.3mm-1.44mm.

The utlity model has following beneficial effect:

The utility model can be monitored the dust concentration in operation place timely and effectively, can grasp better dust concentration situation, carry out effective dedusting and depositing dust, when dust exceeding, spray equipment is sprayed to gauze, when dust is flowed through gauze, sticks on moist gauze and by under fog flushing flow, dust is purified, to guaranteeing personal safety and improving environmental quality and bringing into play extremely important effect.

Accompanying drawing explanation

Fig. 1 is the system block diagram of this practicality;

Fig. 2 is dust control element circuit figure of the present utility model.

In figure, 1 is that return aircourse, 2 is gauze.

The specific embodiment

Below the utility model is described further:

The utility model provides a kind of coal mine return air lane dust control and dust arrester thereof, it is characterized in that: comprise dust control unit and dust removing units,

Described dust removing units comprises spray equipment and is at least the aperture of 3 layers at the gauze of 0.3mm-1.44mm, and described gauze is suspended on the top board of return aircourse, and covers the section of whole passage, and spray equipment is suspended on the top board of return aircourse and sprays to gauze.

The course of work: after power switch is opened, when dust concentration signal that dust sensor detects, ADC0809 converts analog signal to data signal by A/D converter, is transferred to single-chip microcomputer.After powering on, according to the difference of environmental requirement, from keyboard, input the highest dust concentration value of setting.Single-chip microcomputer is presented at the data signal detecting on LCD display, and compares with input setting value, and when the value detecting is greater than setting value, MCU driving buzzer warning, notifies personnel to withdraw.And actuating unit, action is made in the control information that receives single-chip microcomputer, and actuating unit is that relay drives spray equipment.

Single-chip microcomputer processing unit: single-chip microcomputer is the functions such as the core of dust monitor, data acquisition, processing, output, demonstration, is the basis of whole instrument normal operation, and its selection is directly connected to the work of whole system.Select highly versatile, power consumption is little, stable performance is good 8 CMOS microprocessor chip AT89S52 with cheap price, powerful function, meet economic principle completely and meet the requirement of native system.So we select AT89S52 as CPU chip in native system.

Dust sensor: the externally air of sensor of dust concentration enters sensor darkroom by labyrinth type air inlet port under the suction of induced draft fan.When the airborne dust that swims is subject to directional light that laser generator sends and irradiates in darkroom, the scattered light intensity of dust is proportional to mass concentration, this scattered light converts photoelectric current to through optical-electrical converter, through the photoelectric current integrating circuit of master control borad, converts the photoimpact number being directly proportional to scattered light intensity to.Calculate umber of pulse and can measure the relative mass concentration of dust, by demarcating default K value on keyboard is set, during work, just can directly on digital display screen, show airborne bug dust concentration (mg/m ²).

A/D change-over circuit: because single-chip microcomputer can not directly receive analog signals, so voltage measurement signal must be changed rear by A/D and can input single-chip microcomputer and process.A/D converter chip has a variety of, at this, selects familiar ADC0809.ADC0809 is that row A/D conversion cmos device is successively approached on 8,8 tunnel, can carry out acquisition time and A/D conversion to multichannel analog signals, and output digit signals, by three state buffer, can directly be connected with the data/address bus of microprocessor.

Input keyboard circuit design: because dust concentration is different in varying environment, dust amount of flow is also different, people's born maximum Dust Capacity of working in varying environment is also different, so different dust concentration reference value (can accept dust concentration maximum value in this environment) will be set when changing environment, when concentration surpasses set definite value, dust detector is reported to the police, and we just can take corresponding measure according to reporting to the police or make personnel withdraw working site or power reduction dust concentration.Also can self-starting air interchanger when reporting to the police in actual production life.This module utilizes independent key mode by the cumulative input reference of three independent buttons, and whether the data that relatively gather by single-chip microcomputer and reference value are controlled buzzer and reported to the police.The demonstration that can carry out reference value and current concentration value by independent button is switched simultaneously.

Display interface: this module adopts " scm software decoding " to realize the dynamic demonstration of charactron, because it is that decimal number with three represents that the dust concentration of the design's collection is processed through analog-to-digital conversion and single-chip microcomputer, so four LED charactrons are enough to show dust concentration, 4 common anode LED charactrons that this module adopts, because I/O mouth output driving current is too small, so amplifying electric current, triode of the control termination of each charactron makes LED work, and the position choosing of controlling each charactron charactron work when transferring the base stage that controls 4 triodes to and making triode conducting.

Claims

1. coal mine return air lane dust control and a dust arrester thereof, is characterized in that: comprise dust control unit and dust removing units,

2. a kind of coal mine return air lane dust control according to claim 1 and dust arrester thereof, is characterized in that: described gauze is at least 3 layers.

3. a kind of coal mine return air lane dust control according to claim 1 and dust arrester thereof, is characterized in that: the aperture of described gauze is at 0.3mm-1.44mm.