Electrically interlocked dust collector based on internal methane concentration control

Abstract

The utility model discloses a kind of electric lock dust collector based on internal methane concentration control, for coal mine tunneling working face dust control.The device includes dust removal box, fan, methane probe and control box.Dust removal box purifies dust and water mist in dust-containing airflow;Fan suction airflow, including high-speed rotating impeller;Methane probe is set between dust removal box and impeller, monitors internal methane concentration, preferably located in central position to capture highest concentration area;Control box cuts off fan power when methane concentration exceeds standard (≥0.5%), stop running.Methane probe uses laser or infrared sensor, adapts to high dust high humidity environment.The device also includes alarm device, sends sound and light alarm when exceeding standard.The utility model improves the safety and reliability of coal mine dust control underground by accurately monitoring internal methane concentration, fast electric lock and multiple safety protection, applicable to wet or dry dust removal, guarantee tunneling working face safety production.

Description

Technical Field

[0001] This utility model relates to the field of dust control technology in coal mine tunneling working face, specifically to an electrically interlocked dust collector based on internal methane concentration control, which is suitable for the purification and treatment of dust-laden airflow in underground coal mine tunneling roadways and the safety control of excessive methane concentration. Background Technology

[0002] With the continuous advancement of coal mining technology in my country, the mechanization level of tunneling faces has significantly improved, and the power and efficiency of tunneling equipment have greatly increased. However, the amount of dust generated during mechanized tunneling has also increased accordingly. High dust concentrations and wide diffusion ranges mean that dust accumulation in tunneling roadways can potentially trigger dust explosions and other safety accidents, threatening safe coal mine production. Therefore, dust control has become a crucial aspect of ensuring safe production in coal mine tunneling faces.

[0003] Currently, the main methods for dust control at tunneling working faces include ventilation dust removal, spray dust suppression, and dust collector extraction. Among these, dust collector extraction is the most commonly used dust control method due to its high dust collection efficiency and good environmental adaptability. Common dust collectors include wet dust collectors and dry dust collectors. Wet dust collectors capture dust through water mist, while dry dust collectors remove dust through filtration or inertial separation. However, the underground environment of coal mines is complex, and the potential risk of methane gas in the roadways must be considered during the operation of dust collectors. Methane, a common harmful gas in coal mines, is flammable and explosive. When its concentration reaches a certain level (usually 5% to 15%) and encounters a spark or high temperature, it may cause an explosion.

[0004] To ensure safe production, tunneling roadways must employ full-pressure ventilation or forced-flow local ventilation fans. Exhaust fans are typically restricted due to the potential for sparks generated by their high-speed rotating impellers, unless equipped with a methane electrical interlock function. The methane electrical interlock function effectively reduces the risk of explosion and improves the safety of dust collectors underground by monitoring methane concentration and cutting off the fan power when levels exceed limits. However, in existing technologies, methane concentration monitoring typically targets the ambient air in the roadway, with monitoring points often located on the roadway walls or outside the ventilation equipment. This monitoring method has significant drawbacks: the methane concentration in the ambient air cannot accurately reflect the methane concentration in the airflow inside the dust collector, especially in wet dust collectors. Due to the high concentration of dust and water mist inside, the airflow characteristics are complex, making it difficult for external monitoring data to accurately reflect the internal conditions. This can lead to untimely or inaccurate responses from the electrical interlock function.

[0005] Therefore, there is an urgent need for a dust collector that can accurately monitor methane concentration inside the dust collector, adapt to high dust and high humidity environments, and achieve rapid electric interlocking, in order to meet the dual needs of dust control and safe production at coal mine tunneling working surfaces. Utility Model Content

[0006] In view of this, the purpose of this utility model is to overcome the defects of inaccurate methane concentration monitoring and slow response speed in the prior art, and to provide an electrically interlocking dust collector based on internal methane concentration control, which can achieve efficient dust control in coal mine tunneling faces while ensuring rapid electrical interlocking when methane concentration exceeds the standard, thereby improving the safety of underground operations.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] An electrically interlocked dust collector based on internal methane concentration control includes:

[0009] The dust collector is used to purify the dust-laden airflow and remove dust and water mist from it.

[0010] A fan, located downstream of the dust collector, is used to draw in dust-laden airflow. The fan includes a high-speed rotating impeller.

[0011] A methane probe is installed between the dust collector and the impeller of the fan to monitor the methane concentration in the airflow inside the dust collector.

[0012] The control box is electrically connected to the methane probe and the motor of the fan, and is used to cut off the power supply to the motor of the fan when the methane probe detects that the methane concentration exceeds the standard, so as to stop the dust collector from running.

[0013] Preferably, the methane probe is located at the center of the dust collector to monitor the area with the fastest wind speed and the highest methane concentration.

[0014] Preferably, the methane probe is configured to trigger the control box to cut off the power supply to the fan motor when the detected methane concentration reaches or exceeds 0.5%.

[0015] Preferably, the dust collection box is a wet dust collection box or a dry dust collection box.

[0016] Preferably, the dust collection box is a wet dust collection box, including a wet dust collection device and a demisting device. The wet dust collection device captures dust in the dust-laden airflow through water mist, and the demisting device is used to remove water mist from the purified airflow.

[0017] Preferably, the control box includes a signal processing module and a power control module. The signal processing module is used to receive and process the detection signal from the methane probe, and the power control module is used to control the power supply of the fan motor according to the processed signal.

[0018] Preferably, the methane probe is a laser methane sensor or an infrared methane sensor to adapt to the high dust concentration and high humidity environment inside the dust collector.

[0019] Preferably, the dust collector further includes an alarm device electrically connected to the control box, used to issue an audible and visual alarm signal when the methane concentration exceeds the standard.

[0020] The beneficial effects of this utility model are as follows:

[0021] Firstly, by installing a methane probe between the dust collector and the fan impeller, the methane concentration in the airflow inside the dust collector is directly monitored. This avoids the concentration deviation problems caused by dust and water mist interference in traditional external monitoring, significantly improving monitoring accuracy and the reliability of the electrical interlocking function. The probe is positioned at the center inside the dust collector, monitoring the area with the fastest wind speed and the highest methane concentration, ensuring the capture of key risk points and enabling more timely response.

[0022] Secondly, the methane probe uses a laser or infrared methane sensor, which is suitable for high-dust and high-humidity environments, overcoming the shortcomings of traditional sensors that are prone to failure under harsh conditions, and ensuring long-term stable operation. The control box integrates a signal processing module and a power control module, which can quickly cut off the fan power supply when the methane concentration reaches or exceeds 0.5%, with a short response time, effectively avoiding the risk of methane explosion caused by sparks generated by the high-speed rotation of the fan impeller.

[0023] Furthermore, this invention is equipped with an alarm device that emits an audible and visual alarm when methane concentration exceeds the standard, promptly reminding on-site personnel to take emergency measures and further improving the safety of underground operations. The device supports both wet and dry dust collection boxes, adapting to the needs of different tunneling faces and having a wide range of applications.

[0024] In summary, this utility model significantly improves the safety and efficiency of dust control at coal mine tunneling working faces through precise internal methane concentration monitoring, rapid electrical interlock response, and multiple safety protection measures, providing a reliable guarantee for safe underground production.

[0025] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, wherein:

[0027] Figure 1 This is a schematic diagram of an electrically interlocked dust collector based on internal methane concentration control in an embodiment of this utility model.

[0028] Attached diagram labels: 1-Dust-laden airflow; 2-Dust collection box; 3-Clean airflow; 4-Methane probe; 5-Fan impeller; 6-Motor; 7-Control box. Detailed Implementation

[0029] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this utility model. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0030] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the present invention. To better illustrate the embodiments of the present invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0031] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this utility model. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0032] Example 1

[0033] like Figure 1 The image shows an electrically interlocked dust collector based on internal methane concentration control, used for dust control and methane safety control in coal mine tunneling faces. The dust collector includes a dust collection box 2, a fan, a methane probe 4, and a control box 7, and is suitable for both wet and dry dust collection scenarios.

[0034] The dust collector 2 is used to purify the dust-laden airflow 1, removing dust and water mist from the airflow and outputting clean airflow 3. In this embodiment, the dust collector 2 is a wet dust collector, which captures dust particles in the dust-laden airflow 1 by spraying water mist and removes water mist from the purified airflow to ensure the emission quality of the clean airflow 3.

[0035] A fan is located downstream of the dust collector 2 and is used to draw in the dust-laden airflow 1. The fan includes a fan impeller 5 and a motor 6. The fan impeller 5 rotates at high speed, providing suction power to introduce the dust-laden airflow 1 into the dust collector 2 for purification.

[0036] The methane probe 4 is positioned between the dust collector box 2 and the fan impeller 5, preferably at the center of the dust collector to monitor the area with the highest wind speed and methane concentration. The methane probe 4 employs a laser methane sensor or an infrared methane sensor, adaptable to high-dust and high-humidity environments, and features high accuracy and anti-interference capabilities. When the methane probe 4 detects that the methane concentration in the internal airflow reaches or exceeds 0.5%, it outputs a detection signal to the control box 7.

[0037] The control box 7 is electrically connected to the methane probe 4 and the motor 6, and includes a signal processing module and a power control module. The signal processing module receives and processes the detection signal from the methane probe 4, and the power control module controls the power supply to the motor 6 based on the processing results. When the methane concentration exceeds the standard, the control box 7 quickly cuts off the power to the motor 6, stopping the operation of the fan impeller 5 to avoid the risk of a methane explosion caused by sparks generated during high-speed rotation.

[0038] In this embodiment, the dust collector also includes an alarm device electrically connected to the control box 7. When the methane concentration exceeds the standard, it will issue an audible and visual alarm signal to remind on-site operators to take emergency measures and enhance the safety of underground operations.

[0039] In another embodiment, the dust collector 2 can be a dry dust collector, which removes dust by filtration or inertial separation. It also integrates a methane probe 4 and a control box 7 to realize internal methane concentration monitoring and electrical interlocking functions, and is suitable for different tunneling working face environments.

[0040] Example 2

[0041] In this embodiment, the dust collector 2 is a dry dust collector used to purify the dust-laden airflow 1, remove dust from the airflow, and output clean airflow 3. The dry dust collector captures dust particles in the dust-laden airflow 1 through a filter screen or inertial separation device, without the need for water mist, making it suitable for tunneling faces with limited water resources or humidity sensitivity. The fan is located downstream of the dust collector 2 and includes a fan impeller 5 and a motor 6. The fan impeller 5 rotates at high speed, providing suction power to introduce the dust-laden airflow 1 into the dust collector 2 for purification.

[0042] The methane probe 4 is positioned between the dust collector box 2 and the fan impeller 5, preferably at the center of the dust collector to monitor the area with the highest wind speed and methane concentration. The methane probe 4 uses an infrared methane sensor, adaptable to high-dust environments, ensuring detection accuracy. When the methane probe 4 detects that the methane concentration in the internal airflow reaches or exceeds 0.5%, it outputs a detection signal to the control box 7.

[0043] The control box 7 is electrically connected to the methane probe 4 and the motor 6, and includes a signal processing module and a power control module. The signal processing module receives and processes the detection signal from the methane probe 4, and the power control module controls the power supply to the motor 6 based on the processing results. When the methane concentration exceeds the standard, the control box 7 quickly cuts off the power to the motor 6, stopping the operation of the fan impeller 5 to prevent the risk of explosion.

[0044] Similar to Example 1, the dust collector in this example is equipped with an alarm device electrically connected to the control box 7. When the methane concentration exceeds the standard, it will issue an audible and visual alarm signal to remind on-site operators to take emergency measures.

[0045] This invention significantly improves the safety and reliability of underground dust control in coal mines by accurately monitoring methane concentration inside the dust collector, implementing rapid-response electrical interlocking, and equipping it with alarm functions. It is applicable to various dust control scenarios in tunneling operations.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of this technical solution, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An electrically interlocked dust collector based on internal methane concentration control, characterized in that, include: The dust collector is used to purify the dust-laden airflow and remove dust and water mist from it. A fan, located downstream of the dust collector, is used to draw in dust-laden airflow. The fan includes a high-speed rotating impeller. A methane probe is installed between the dust collector and the impeller of the fan to monitor the methane concentration in the airflow inside the dust collector. The control box is electrically connected to the methane probe and the motor of the fan, and is used to cut off the power supply to the motor of the fan when the methane probe detects that the methane concentration exceeds the standard, so as to stop the dust collector from running.

2. The electrically interlocked dust collector according to claim 1, characterized in that, The methane probe is positioned at the center of the dust collector to monitor the area with the fastest wind speed and the highest methane concentration.

3. The electrically interlocked dust collector according to claim 1, characterized in that, The dust collection box can be a wet dust collection box or a dry dust collection box.

4. The electrically interlocked dust collector according to claim 1, characterized in that, The dust collection box is a wet dust collection box, which includes a wet dust collection device and a demisting device. The wet dust collection device captures dust in the dust-laden airflow through water mist, and the demisting device is used to remove water mist from the purified airflow.

5. The electrically interlocked dust collector according to claim 1, characterized in that, The control box includes a signal processing module and a power control module. The signal processing module is used to receive and process the detection signal from the methane probe, and the power control module is used to control the power supply of the fan motor according to the processed signal.

6. The electrically interlocked dust collector according to claim 1, characterized in that, The methane probe is a laser methane sensor or an infrared methane sensor, adapted to the high dust concentration and high humidity environment inside the dust collector.

7. The electrically interlocked dust collector according to claim 1, characterized in that, The dust collector also includes an alarm device, which is electrically connected to the control box and is used to issue an audible and visual alarm signal when the methane concentration exceeds the standard.

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