Strip mine dust concentration monitoring device

Abstract

The invention discloses a strip mine dust concentration monitoring device which comprises a mounting rod, a dust concentration monitoring cabinet, a control panel, an audible and visual alarm and a wind speed sensor are fixedly mounted on the mounting rod, and the dust concentration monitoring cabinet comprises a cabinet body. A detection mechanism, an air inlet mechanism, an air exhaust mechanism, a high-pressure ash removal mechanism and a dust collection mechanism are fixedly installed in an inner cavity of the cabinet body. The air inlet end of the air inlet mechanism and the air outlet end of the air outlet mechanism are located on the outer side of the cabinet body, and the air outlet end of the air inlet mechanism and the air inlet end of the air outlet mechanism are communicated with the detection mechanism. The invention aims to solve the technical problems that in the use process of an existing strip mine dust concentration monitoring device, dust particles accumulated in a detection cavity are inconvenient to clean and collect, the dust concentration detection precision is easy to reduce, and subsequent detection on organic matter pollution in dust is influenced.

Description

Technical Field

[0001] The present invention relates to the technical field of dust measurement, and particularly to an open-pit mine dust concentration monitoring device. Background Art

[0002] An open-pit mine dust concentration monitoring device is a device specifically used for measuring and monitoring the dust concentration in the air of an open-pit mining area. Mining activities often generate a large amount of dust, which affects the respiratory health of workers, reduces visibility, and increases the risk of accidents. An open-pit mine dust concentration monitoring device usually includes a sensor, a data recorder, and an alarm system. The sensor is responsible for detecting the concentration of dust particles in the air and quantifying the dust content through principles such as optics or laser scattering. The data recorder is used to store the collected data for subsequent analysis. The alarm system will issue an alarm when the dust concentration exceeds the preset safety standard, reminding the on-site personnel to take protective measures or adjust the operation mode. Using such a device helps to improve the overall quality and safety of the working environment.

[0003] In open-pit mine operations, heavy machinery and equipment such as excavators, loaders, and transport trucks use diesel or other fossil fuels as power sources. These devices emit volatile organic compounds and polycyclic aromatic hydrocarbons during operation. When these exhaust gases mix with the air in the mining area, some organic pollutants will adhere to the dust particles. After the organic pollutants enter the soil or water body along with the dust particles, they will affect the local ecosystem, damage biodiversity, and even accumulate through the food chain, threatening the health of humans and other organisms. Therefore, it is also necessary to detect the organic pollution in the dust. When detecting the organic pollution in the dust, an extraction solution is needed to extract the organic matter in the dust, and then a gas chromatograph is used to detect the solution.

[0004] During the use of the existing open-pit mine dust concentration monitoring device, it is not convenient to clean and collect the dust particles accumulated inside the detection chamber, which easily leads to a decrease in the accuracy of dust concentration detection and affects the subsequent detection of organic pollution in the dust. Summary of the Invention

[0005] The technical problem to be solved by the present invention is that during the use of the existing open-pit mine dust concentration monitoring device, it is not convenient to clean and collect the dust particles accumulated inside the detection chamber, which easily leads to a decrease in the accuracy of dust concentration detection and affects the subsequent detection of organic pollution in the dust.

[0006] To solve the above technical problems, the present invention provides the following technical solution: An open-pit mine dust concentration monitoring device, including a mounting rod, on which a dust concentration monitoring cabinet, a control panel, an audible and visual alarm, and a wind speed sensor are respectively and fixedly installed. The dust concentration monitoring cabinet includes a cabinet body, and inside the cabinet body cavity, a detection mechanism, an air intake mechanism, an exhaust mechanism, a high-pressure dust cleaning mechanism, and a dust collection mechanism are respectively and fixedly installed;

[0007] The air intake end of the air intake mechanism and the air outlet end of the exhaust mechanism are located outside the cabinet body, and the air outlet end of the air intake mechanism and the air intake end of the exhaust mechanism are communicated with the detection mechanism;

[0008] The air outlet end of the high-pressure dust cleaning mechanism is communicated with the top of the detection mechanism, the air intake end of the dust collection mechanism is communicated with the bottom of the detection mechanism, and the air outlet end of the dust collection mechanism penetrates to the bottom of the cabinet body.

[0009] As a preferred scheme of the open-pit mine dust concentration monitoring device of the present invention, wherein: a display and a communication module are fixedly installed on the control panel.

[0010] As a preferred scheme of the open-pit mine dust concentration monitoring device of the present invention, wherein: the bottom of the mounting rod is fixedly connected with a base.

[0011] As a preferred scheme of the open-pit mine dust concentration monitoring device of the present invention, wherein: a cabinet door is installed on the front of the cabinet body.

[0012] As a preferred scheme of the open-pit mine dust concentration monitoring device of the present invention, wherein: a central controller and a temperature and humidity sensor are fixedly installed on the top of the inner cavity of the cabinet, and the detection end of the temperature and humidity sensor penetrates to the outside of the cabinet body.

[0013] As a preferred scheme of the open-pit mine dust concentration monitoring device of the present invention, wherein: the detection mechanism includes a detection chamber, on the top of the detection chamber, a photodetector is fixedly installed, on the bottom of the detection chamber, a light source is fixedly installed, the detection end of the photodetector and the emission end of the light source penetrate into the inner cavity of the detection chamber and are arranged opposite to each other, and on the bottom of the inner cavity of the detection chamber, a light-transmitting plate is fixedly installed, and the light-transmitting plate is located at one end opposite to the light source and the photodetector.

[0014] As a preferred scheme of the open-pit mine dust concentration monitoring device of the present invention, wherein: the air intake mechanism includes a first fan, the air intake end of the first fan is communicated with a pre-filter, a flat filter screen is installed inside the pre-filter, the air outlet end of the first fan is communicated with a first solenoid valve, and the first solenoid valve is communicated with the top of the inner cavity of the detection chamber.

[0015] As a preferred embodiment of the open-pit mine dust concentration monitoring device of the present invention, the exhaust mechanism includes a second fan. The intake end of the second fan is connected to a second solenoid valve, and the second solenoid valve is connected to the bottom of the inner cavity of the detection chamber. The outlet end of the second fan is connected to an exhaust hopper, and the exhaust hopper is fixedly installed on the surface of the cabinet. The outlet end of the exhaust hopper is connected to an exhaust elbow, and a check valve is fixedly installed at the bottom of the inner cavity of the exhaust elbow.

[0016] As a preferred embodiment of the open-pit mine dust concentration monitoring device of the present invention, the high-pressure dust cleaning mechanism includes a high-pressure gas tank. The outlet end of the high-pressure gas tank is connected to a third solenoid valve, and the outlet end of the third solenoid valve is connected to a high-pressure gas nozzle. The bottom of the high-pressure gas nozzle penetrates to the top of the inner cavity of the detection chamber. An installation bracket is installed on the surface of the high-pressure gas tank through bolts, and a support seat is movably connected to the bottom of the high-pressure gas tank. The high-pressure gas tank and the support seat are fixedly connected to the inner wall of the cabinet.

[0017] As a preferred embodiment of the open-pit mine dust concentration monitoring device of the present invention, the dust collection mechanism includes a collection container. The top of the collection container is connected to an ash inlet pipe, and the intake end of the ash inlet pipe is connected to a fourth solenoid valve. The intake end of the fourth solenoid valve penetrates to the bottom of the inner cavity of the detection chamber. A dust hopper is fixedly connected to the middle end of the inner cavity of the collection container. The bottom of the dust hopper is connected to a dust discharge valve, and the bottom of the dust discharge valve is connected to a threaded dust discharge head. The bottom of the threaded dust discharge head penetrates to the bottom of the cabinet. A semi-circular filter screen is fixedly installed at the top of the inner cavity of the collection container, and the semi-circular filter screen is located above the dust hopper. An air outlet pipe connected to the semi-circular filter screen is installed on the surface of the collection container, and the outlet end of the air outlet pipe penetrates to the outside of the cabinet.

[0018] The beneficial effects of the present invention:

[0019] 1. The present invention can achieve the cleaning of dust in the detection chamber by setting up a high-pressure dust cleaning mechanism. The high-pressure gas tank stores high-pressure gas. When cleaning is required, the central controller issues an instruction to open the third solenoid valve, enabling the high-pressure gas to be ejected at high speed through the high-pressure nozzle into the top of the inner cavity of the detection chamber, directly impacting the inner wall of the detection chamber and other areas prone to dust accumulation, strongly removing the dust particles adhering to them. The dust particles blown off by the high-pressure gas fall to the bottom of the detection chamber under the action of gravity and are sucked into the collection container through the dust inlet pipe. In the collection container, the semi-circular filter screen preliminarily filters larger particulate matters to prevent them from entering the air outlet pipe, while the filtered air is discharged outside the cabinet through the air outlet pipe, ensuring that the dust is effectively separated and stored in the ash hopper. During the entire dust cleaning process, the high-pressure dust cleaning mechanism is controlled by the central controller to start according to the preset time interval or the degree of dust accumulation, realizing an automated cleaning process, reducing manual intervention while ensuring the cleanliness of the detection environment. Through the above steps, the dust particles that may affect the accuracy of the photodetector can be effectively removed, ensuring that the light emitted by the light source can accurately pass through the detection sample and reach the photodetector, thereby improving the accuracy of the dust concentration detection result.

[0020] 2. The present invention can collect the dust particles cleaned by the high-pressure dust cleaning mechanism by setting up a dust collection mechanism. The threaded dust discharge head at the bottom of the dust collection mechanism can be directly connected to the organic pollutant extraction mechanism, ensuring that the next step can be directly carried out after the dust is collected, without the need for additional transfer of the dust sample, reducing the risk of sample loss and contamination. The core of the organic pollutant extraction mechanism is a solvent cylinder, which pre-stores a solvent suitable for extracting organic pollutants in open-pit mine dust. When the dust collection mechanism discharges dust, these dusts directly enter the solvent cylinder and mix with the solvent. By manually operating the handwheel on the lead screw to make the piston reciprocate, it promotes the full contact between the solvent and the organic pollutants in the dust, improving the extraction efficiency. After being fully mixed with the solvent, the solution contains the organic pollutants extracted from the dust. This solution then enters the purification module through the second threaded sleeve. The particle filter element here can remove the particulate impurities and other insoluble substances in the solution. The purified solution finally flows to the liquid outlet nozzle under the control of the second manual valve. The user can collect these solutions containing organic pollutants with a container. The collected solutions can be further detected using equipment such as gas chromatographs to evaluate the specific content of organic pollutants in open-pit mine dust. Since the entire process from dust collection to solvent extraction and then to purification treatment is completed in a closed system, it greatly reduces the interference of external factors on the sample and ensures the accuracy of the subsequent detection results. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of the present invention;

[0022] Figure 2Schematic diagram of the dust concentration monitoring cabinet of the present invention;

[0023] Figure 3 Cross-sectional view of the dust concentration monitoring cabinet of the present invention;

[0024] Figure 4 Cross-sectional view of the detection mechanism of the present invention;

[0025] Figure 5 Cross-sectional view of the air intake mechanism of the present invention;

[0026] Figure 6 Cross-sectional view of the exhaust mechanism of the present invention;

[0027] Figure 7 Cross-sectional view of the dust collection mechanism of the present invention;

[0028] Figure 8 Schematic diagram of the high-pressure dust cleaning mechanism of the present invention;

[0029] Figure 9 Schematic diagram of the installation state of the organic pollutant extraction mechanism of the present invention;

[0030] Figure 10 Schematic diagram of the structure of the organic pollutant extraction mechanism of the present invention;

[0031] Figure 11 Cross-sectional view of the organic pollutant extraction mechanism of the present invention.

[0032] In the figure: 1, mounting rod; 2, dust concentration monitoring cabinet; 3, control panel; 4, audible and visual alarm; 5, wind speed sensor; 6, display; 7, communication module; 8, base; 9, organic pollutant extraction mechanism; 201, cabinet body; 202, detection mechanism; 203, air intake mechanism; 204, exhaust mechanism; 205, high-pressure dust cleaning mechanism; 206, dust collection mechanism; 207, central controller; 208, temperature and humidity sensor; 209, cabinet door; 210, detection chamber; 211, light source; 212, light-transmitting plate; 213, photoelectric detector; 214, first fan; 215, pre-filter; 216, flat filter screen; 217, first solenoid valve; 218, second fan; 219, exhaust hopper; 220, exhaust elbow; 221, check valve; 222, second solenoid valve; 223, collection container; 224, threaded ash discharge head; 225, ash discharge valve; 226, ash hopper; 227, semi-circular filter screen; 228, air outlet pipe; 229, ash inlet pipe; 230, fourth solenoid valve; 231, high-pressure gas tank; 232, third solenoid valve; 233, high-pressure gas nozzle; 234, support seat; 235, mounting bracket; 901, solvent cylinder; 902, second manual valve; 903, liquid outlet nozzle; 904, purification module; 905, second threaded sleeve; 906, first manual valve; 907, first threaded sleeve; 908, lead screw; 909, threaded joint; 910, piston; 911, particle filter element. Detailed implementation manners

[0033] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following detailed description of the specific implementation manners of the present invention will be given in conjunction with the accompanying drawings of the specification.

[0034] As Figures 1-11 shown, this embodiment provides an open-pit mine dust concentration monitoring device, including a mounting rod 1, on which a dust concentration monitoring cabinet 2, a control panel 3, an audible and visual alarm 4, and a wind speed sensor 5 are respectively fixedly installed. A display 6 and a communication module 7 are fixedly installed on the control panel 3, and the bottom of the mounting rod 1 is fixedly connected to a base 8.

[0035] The mounting rod 1 is stably mounted at the monitoring position on the open-pit mine through the base 8. When monitoring the dust concentration in the open-pit mine, the dust concentration monitoring cabinet 2 is responsible for real-time monitoring of the dust concentration in the surrounding environment, while the wind speed sensor 5 measures the wind speed in the working area at the same time. These data are continuously collected and transmitted to the control panel 3 for processing. After receiving the data from the dust concentration monitoring cabinet 2 and the wind speed sensor 5, the control panel 3 analyzes the data using the internal algorithm, and the analysis results are visually displayed to the operators through the display 6 so that they can timely understand the current working environment conditions. When the monitored dust concentration exceeds the preset safety threshold, the control panel 3 triggers the audible and visual alarm 4 to warn the on-site staff to take corresponding protective measures or adjust the working mode to reduce the risk of dust exposure. The communication module 7 on the control panel 3 is connected to the cloud service to send the monitoring data and alarm information to the remote monitoring center or smart phone for remote management and decision support. By real-time monitoring of the dust concentration and timely issuing alarms, the health and safety of the on-site staff are effectively protected. The remote communication function enables the latest environmental conditions to be grasped even when not on site, which is conducive to implementing more efficient management and emergency response strategies. Wind speed is one of the important factors affecting dust diffusion. By monitoring the wind speed through the wind speed sensor 5, the dust diffusion pattern and concentration change can be analyzed more accurately.

[0036] Further, the dust concentration monitoring cabinet 2 includes a cabinet body 201. A cabinet door 209 is installed on the front of the cabinet body 201. A central controller 207 and a temperature and humidity sensor 208 are fixedly installed on the top of the inner cavity of the cabinet body 201. The detection end of the temperature and humidity sensor 208 penetrates to the outside of the cabinet body 201. A detection mechanism 202, an air intake mechanism 203, an exhaust mechanism 204, a high-pressure dust cleaning mechanism 205 and a dust collection mechanism 206 are respectively fixedly installed in the inner cavity of the cabinet body 201. The air intake end of the air intake mechanism 203 and the air outlet end of the exhaust mechanism 204 are located outside the cabinet body 201. The air outlet end of the air intake mechanism 203 and the air intake end of the exhaust mechanism 204 are communicated with the detection mechanism 202. The air outlet end of the high-pressure dust cleaning mechanism 205 is communicated with the top of the detection mechanism 202. The air intake end of the dust collection mechanism 206 is communicated with the bottom of the detection mechanism 202. The air outlet end of the dust collection mechanism 206 penetrates to the bottom of the cabinet body 201.

[0037] The temperature and humidity of the air environment in the open-pit mine are detected by the temperature and humidity sensor 208. The temperature and humidity conditions in the air can affect the behavior of dust. For example, when the humidity is relatively high, dust particles may absorb moisture and become larger, thereby changing their optical properties or sedimentation speed. By simultaneously monitoring the temperature and humidity, necessary corrections can be made to the measurement results of the dust concentration, improving the accuracy of the data. The central controller 207 is responsible for the coordination and data processing of the entire system. The intake mechanism 203 extracts air samples from the outside and enters them into the cabinet 201. The air samples are first filtered to remove large particles in the air, ensuring that the air samples entering the detection mechanism 202 are suitable for analysis. The large particles include soil and ore debris, plant residues and other sundries, insects, and biological particles. The detection mechanism 202 analyzes the dust concentration of the entering air samples and sends the analysis results to the central controller 207 for real-time monitoring of the dust concentration level. The air samples after detection are discharged from the cabinet 201 through the exhaust mechanism 204. To keep the detection mechanism 202 clean and prevent dust accumulation from affecting the detection accuracy, the high-pressure dust cleaning mechanism 205 regularly sprays high-pressure gas into the interior of the detection mechanism 202 to remove the attached dust particles. The cleaned dust particles fall into the dust collection mechanism 206 by gravity.

[0038] Further, the detection mechanism 202 includes a detection chamber 210. A photodetector 213 is fixedly installed at the top of the detection chamber 210, and a light source 211 is fixedly installed at the bottom of the detection chamber 210. The detection end of the photodetector 213 and the emission end of the light source 211 penetrate into the inner cavity of the detection chamber 210 and are oppositely arranged. A light-transmitting plate 212 is fixedly installed at the bottom of the inner cavity of the detection chamber 210, and the light-transmitting plate 212 is located at one end opposite to the light source 211 and the photodetector 213.

[0039] The intake mechanism 203 introduces the external air sample containing dust into the detection chamber 210. During this process, the air sample passes through a specific path to ensure that it can be evenly distributed in the detection chamber 210. The light source 211 located at the bottom of the detection chamber 210 emits light. The light source 211 is an LED light source or a laser light source. This light passes through the light-transmitting plate 212. The function of the light-transmitting plate 212 is to protect the light source 211 from direct contamination while allowing the light to pass through smoothly. The photoelectric detector 213 is installed at the top of the detection chamber 210, and its detection end is arranged opposite to the light source 211, and is used to receive the light passing through the air sample. When the dust particles in the air pass through the light, they will scatter or absorb part of the light. The photoelectric detector 213 judges the dust concentration in the air according to the change of the received light intensity. The higher the dust concentration, the greater the degree of light scattering or absorption, and the weaker the light received by the photoelectric detector 213. The photoelectric detector 213 converts the captured light change information into an electrical signal and transmits it to the central controller 207, which performs data analysis and processing. According to these data, the system monitors the dust concentration level in the current environment in real time and decides whether to trigger an alarm or other response measures.

[0040] Further, the intake mechanism 203 includes a first fan 214. The intake end of the first fan 214 is connected to a pre-filter 215. A flat filter screen 216 is installed inside the pre-filter 215. The outlet end of the first fan 214 is connected to a first solenoid valve 217. The first solenoid valve 217 is connected to the top of the inner cavity of the detection chamber 210.

[0041] The intake mechanism 203 extracts an air sample from the external environment through the intake end of the first fan 214. Before entering the first fan 214, the air first passes through the pre-filter 215, in which a flat filter screen 216 is installed. The function of the flat filter screen 216 is to preliminarily filter larger particulate matters to protect the subsequent detection equipment from the influence of large particle pollutants. When the air passes through the pre-filter 215, the flat filter screen 216 intercepts large particles and other impurities, ensuring that the air quality entering the first fan 214 is relatively high, reducing the wear and pollution of the internal components of the system. The air after primary filtration is pushed by the first fan 214 and further conveyed into the detection mechanism 202. The first solenoid valve 217 is used to control the air flow entering the detection chamber 210. It can be opened or closed according to the instruction of the central controller 207 to adjust the amount of air sample entering, ensuring that an appropriate amount of air sample can be used for accurate measurement in each detection. The air sample processed through the above steps finally enters the top of the inner cavity of the detection chamber 210 through the first solenoid valve 217 for dust concentration detection.

[0042] Further, the exhaust mechanism 204 includes a second fan 218. The intake end of the second fan 218 is communicated with a second solenoid valve 222. The second solenoid valve 222 is communicated with the bottom of the inner cavity of the detection chamber 210. The outlet end of the second fan 218 is communicated with an exhaust hopper 219. The exhaust hopper 219 is fixedly installed on the surface of the cabinet 201. The outlet end of the exhaust hopper 219 is communicated with an exhaust elbow 220. A check valve 221 is fixedly installed at the bottom of the inner cavity of the exhaust elbow 220.

[0043] After the dust concentration detection is completed in the detection chamber 210, the detected air needs to be discharged. This process starts with the opening of the second solenoid valve 222. The second solenoid valve 222 controls the passage from the bottom of the inner cavity of the detection chamber 210 to the intake end of the second fan 218. When the second solenoid valve 222 is opened, the second fan 218 starts and extracts the air that has completed the detection in the detection chamber 210 through its intake end. The second fan 218 provides the necessary power for this process to ensure that the air can smoothly flow from the detection chamber 210 to the external environment. The air extracted by the second fan 218 then enters the exhaust hopper 219, which is a component fixedly installed on the surface of the cabinet 201 and is responsible for guiding the air to the exhaust elbow 220. A check valve 221 is installed inside the exhaust elbow 220 to ensure that the air can only flow in one direction, that is, from the detection chamber 210 to the outside, preventing the reverse flow of external air.

[0044] Further, the high-pressure dust cleaning mechanism 205 includes a high-pressure gas tank 231. The outlet end of the high-pressure gas tank 231 is communicated with a third solenoid valve 232. The outlet end of the third solenoid valve 232 is communicated with a high-pressure gas nozzle 233. The bottom of the high-pressure gas nozzle 233 penetrates to the top of the inner cavity of the detection chamber 210. An installation bracket 235 is installed on the surface of the high-pressure gas tank 231 through bolts. The bottom of the high-pressure gas tank 231 is movably connected with a support seat 234. The high-pressure gas tank 231 and the support seat 234 are fixedly connected to the inner wall of the cabinet 201.

[0045] The core component of the high-pressure dust cleaning mechanism 205 is the high-pressure gas tank 231, which stores the high-pressure gas used to clean the interior of the detection chamber 210. The high-pressure gas tank 231 is firmly fixed to the inner wall of the cabinet 201 through the mounting frame 235 and the support base 234 to ensure its stable position and prevent it from moving due to external vibrations or other factors. When it is necessary to clean the dust in the detection chamber 210, at preset time intervals, the central controller 207 issues an instruction to open the third solenoid valve 232. After the third solenoid valve 232 is opened, the high-pressure gas in the high-pressure gas tank 231 flows through the third solenoid valve 232 to the high-pressure nozzle 233. The bottom of the high-pressure nozzle 233 penetrates to the top of the inner cavity of the detection chamber 210 and directly aims at the area to be cleaned. The high-pressure gas jets out from the high-pressure nozzle 233 at high speed, strongly impacting the inner surface of the detection chamber 210, especially the places where dust is likely to accumulate. Through high-speed spraying, the dust particles attached to the inner wall of the detection chamber 210 and other components can be effectively blown off to keep the detection chamber 210 clean. The blown-off dust particles will then fall to the bottom of the detection chamber 210 under the action of gravity and are further collected and processed by the dust collection mechanism 206, ensuring that the cleaned dust will not pollute the detection environment again or affect the subsequent detection accuracy.

[0046] Further, the dust collection mechanism 206 includes a collection container 223. The top of the collection container 223 is connected to an ash inlet pipe 229. The inlet end of the ash inlet pipe 229 is connected to a fourth solenoid valve 230. The inlet end of the fourth solenoid valve 230 penetrates to the bottom of the inner cavity of the detection chamber 210. A dust hopper 226 is fixedly connected to the middle end of the inner cavity of the collection container 223. The bottom of the dust hopper 226 is connected to a dust discharge valve 225. The bottom of the dust discharge valve 225 is connected to a threaded dust discharge head 224. The bottom of the threaded dust discharge head 224 penetrates to the bottom of the cabinet 201. A semi-circular filter screen 227 is fixedly installed at the top of the inner cavity of the collection container 223. The semi-circular filter screen 227 is located above the dust hopper 226. An air outlet pipe 228 connected to the semi-circular filter screen 227 is installed on the surface of the collection container 223. The outlet end of the air outlet pipe 228 penetrates to the outside of the cabinet 201.

[0047] When cleaning the dust, it starts with opening the fourth solenoid valve 230 first. The fourth solenoid valve 230 controls the passage from the bottom of the inner cavity of the detection chamber 210 to the dust inlet pipe 229. After the fourth solenoid valve 230 is opened, the air carrying dust particles at the bottom of the inner cavity of the detection chamber 210 is inhaled into the collection container 223 in the dust collection mechanism 206 through the dust inlet pipe 229. During this process, the semi-circular filter screen 227 is located at the top of the inner cavity of the collection container 223, which is used to initially filter larger particulate matters to prevent them from directly entering the air outlet pipe 228. The air and dust mixture entering the collection container 223 flows through the semi-circular filter screen 227. Larger or heavier particulate matters fall into the ash hopper 226 due to gravity, while the filtered clean air is discharged to the outside of the cabinet 201 through the air outlet pipe 228, so that the dust particles are effectively separated and stored in the ash hopper 226. When ash discharge is required, ash discharge treatment is carried out by operating the ash discharge valve 225. The bottom of the ash discharge valve 225 is connected to a threaded ash discharge head 224, so that the dust can be smoothly discharged from the collection container 223, and the bottom of the threaded ash discharge head 224 penetrates through the bottom of the cabinet 201 to ensure that the dust can be safely and conveniently discharged to the outside.

[0048] Further, it also includes an organic pollutant extraction mechanism 9. The organic pollutant extraction mechanism 9 is installed at the bottom of the dust concentration monitoring cabinet 2 and is threadedly connected to the bottom of the dust collection mechanism 206 to collect the dust discharged from the dust collection mechanism 206.

[0049] Further, the organic pollutant extraction mechanism 9 includes a solvent cylinder 901. The top of the solvent cylinder 901 is connected to a first manual valve 906. The top of the first manual valve 906 is rotatably connected to a threaded joint 909. A sealing structure is provided at the connection between the first manual valve 906 and the threaded joint 909. The threaded joint 909 is threadedly sleeved on the surface of the threaded ash discharge head 224.

[0050] Further, the left and right ends of the solvent cylinder 901 are respectively threadedly sleeved with a first threaded sleeve 907 and a second threaded sleeve 905. A lead screw 908 is threadedly connected inside the first threaded sleeve 907. One end of the lead screw 908 is installed with a piston 910. The piston 910 is slidably connected to the inner wall of the solvent cylinder 901. The other end of the lead screw 908 is fixedly connected to a hand wheel. One end of the second threaded sleeve 905 is connected to a purification module 904. A particle filter element 911 is fixedly installed inside the inner cavity of the purification module 904. One end of the purification module 904 is connected to a second manual valve 902. One end of the second manual valve 902 is connected to a liquid outlet nozzle 903. The inner cavity of the solvent cylinder 901 stores a solvent for extracting organic pollutants from the open-pit mine dust.

[0051] When extracting organic pollutants from open-pit mine dust, first, connect the organic pollutant extraction mechanism 9 to the threaded ash discharge head 224 at the bottom of the dust collection mechanism 206 through the threaded joint 909. The solvent cylinder 901 pre-stores the solvent for extracting organic pollutants from open-pit mine dust. When the dust collection mechanism 206 discharges dust through the ash discharge valve 225 and the threaded ash discharge head 224, this dust directly enters the solvent cylinder 901 of the organic pollutant extraction mechanism 9 and mixes with the extraction solution in the solvent cylinder 901. Rotate the handwheel reciprocally to drive the lead screw 908, so that the piston 910 reciprocally slides inside the solvent cylinder 901, thereby promoting the shaking of the solvent and facilitating the full contact between the solvent and the organic pollutants in the dust, improving the extraction efficiency. Under the action of shaking, the solvent fully mixes with the organic pollutants in the dust, dissolves or disperses the organic substances therein, forming a solution containing organic pollutants. When the extraction is completed, push the organic pollutants through the piston 910. The solution containing pollutants then enters the purification module 904 through the second threaded sleeve 905. Here, the particle filter element 911 filters the solution to remove the particulate impurities or other insoluble substances present in the solvent. The purified solution is controlled by the second manual valve 902 to flow towards the liquid outlet nozzle 903, and the user collects it through a container, and then uses a gas chromatograph for detection to evaluate the content of organic pollutants in the open-pit mine dust. The first manual valve 906 and the second manual valve 902 are respectively used to control the on-off between the solvent cylinder 901 and the dust collection mechanism 206 and between the purification module 904 and the liquid outlet nozzle 903, ensuring the safety and effectiveness of the whole process.

Claims

1. An open-pit mine dust concentration monitoring device, comprising a mounting rod (1), on which a dust concentration monitoring cabinet (2), a control panel (3), an audible and visual alarm (4) and a wind speed sensor (5) are respectively and fixedly installed, and characterized in that: The dust concentration monitoring cabinet (2) includes a cabinet body (201), and a detection mechanism (202), an air inlet mechanism (203), an exhaust mechanism (204), a high-pressure dust cleaning mechanism (205) and a dust collection mechanism (206) are respectively and fixedly installed in the inner cavity of the cabinet body (201); The air inlet end of the air inlet mechanism (203) and the air outlet end of the exhaust mechanism (204) are located outside the cabinet body (201), and the air outlet end of the air inlet mechanism (203) and the air inlet end of the exhaust mechanism (204) are communicated with the detection mechanism (202); The air outlet end of the high-pressure dust cleaning mechanism (205) is communicated with the top of the detection mechanism (202), the air inlet end of the dust collection mechanism (206) is communicated with the bottom of the detection mechanism (202), and the air outlet end of the dust collection mechanism (206) penetrates to the bottom of the cabinet body (201).

2. The open-pit mine dust concentration monitoring device according to claim 1, characterized in that: A display (6) and a communication module (7) are fixedly installed on the control panel (3).

3. The open-pit mine dust concentration monitoring device according to claim 2, wherein: The bottom of the mounting rod (1) is fixedly connected with a base (8).

4. The open-pit mine dust concentration monitoring device according to claim 3, characterized in that: A cabinet door (209) is installed on the front of the cabinet body (201).

5. The open-pit mine dust concentration monitoring device according to claim 4, characterized in that: A central controller (207) and a temperature and humidity sensor (208) are fixedly installed on the top of the inner cavity of the cabinet body (201), and the detection end of the temperature and humidity sensor (208) penetrates to the outside of the cabinet body (201).

6. The open-pit mine dust concentration monitoring device according to claim 5, wherein: The detection mechanism (202) includes a detection chamber (210), a photodetector (213) is fixedly installed on the top of the detection chamber (210), a light source (211) is fixedly installed on the bottom of the detection chamber (210), the detection end of the photodetector (213) and the emission end of the light source (211) penetrate into the inner cavity of the detection chamber (210) and are arranged opposite to each other, and a light-transmitting plate (212) is fixedly installed on the bottom of the inner cavity of the detection chamber (210), and the light-transmitting plate (212) is located at one end opposite to the light source (211) and the photodetector (213).

7. The dust concentration monitoring device for open-pit mines according to claim 6, wherein: The air inlet mechanism (203) includes a first fan (214), the air inlet end of the first fan (214) is communicated with a pre-filter (215), a flat filter screen (216) is installed inside the pre-filter (215), the air outlet end of the first fan (214) is communicated with a first solenoid valve (217), and the first solenoid valve (217) is communicated with the top of the inner cavity of the detection chamber (210).

8. The open-pit mine dust concentration monitoring device according to claim 7, characterized in that: The exhaust mechanism (204) includes a second fan (218), the air inlet end of the second fan (218) is communicated with a second solenoid valve (222), the second solenoid valve (222) is communicated with the bottom of the inner cavity of the detection chamber (210), the air outlet end of the second fan (218) is communicated with an exhaust funnel (219), the exhaust funnel (219) is fixedly installed on the surface of the cabinet body (201), the air outlet end of the exhaust funnel (219) is communicated with an exhaust elbow (220), and a check valve (221) is fixedly installed on the bottom of the inner cavity of the exhaust elbow (220).

9. The open-pit mine dust concentration monitoring device according to claim 8, characterized in that: The high-pressure dust cleaning mechanism (205) includes a high-pressure gas tank (231). The air outlet end of the high-pressure gas tank (231) is connected to a third solenoid valve (232). The air outlet end of the third solenoid valve (232) is connected to a high-pressure air nozzle (233). The bottom of the high-pressure air nozzle (233) penetrates to the top of the inner cavity of the detection chamber (210). The surface of the high-pressure gas tank (231) is installed with a mounting bracket (235) by bolts. The bottom of the high-pressure gas tank (231) is movably connected to a support seat (234). The high-pressure gas tank (231) and the support seat (234) are fixedly connected to the inner wall of the cabinet body (201).

10. The open-pit mine dust concentration monitoring device according to claim 9, characterized in that: The dust collection mechanism (206) includes a collection container (223). The top of the collection container (223) is connected to an ash inlet pipe (229). The air inlet end of the ash inlet pipe (229) is connected to a fourth solenoid valve (230). The air inlet end of the fourth solenoid valve (230) penetrates to the bottom of the inner cavity of the detection chamber (210). The middle end of the inner cavity of the collection container (223) is fixedly connected to an ash hopper (226). The bottom of the ash hopper (226) is connected to an ash discharge valve (225). The bottom of the ash discharge valve (225) is connected to a threaded ash discharge head (224). The bottom of the threaded ash discharge head (224) penetrates to the bottom of the cabinet body (201). The top of the inner cavity of the collection container (223) is fixedly installed with a semi-circular filter screen (227). The semi-circular filter screen (227) is located at the top of the ash hopper (226). The surface of the collection container (223) is installed with an air outlet pipe (228) communicated with the semi-circular filter screen (227). The air outlet end of the air outlet pipe (228) penetrates to the outside of the cabinet body (201).

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