Deposited coal dust quality detection device and method for coal mine

Abstract

The invention relates to a deposited coal dust quality detection device and method for a coal mine, and belongs to the technical field of coal mine deposited dust quality detection. The device comprises an umbrella-shaped tray, a heating wire, a weight sensing unit, a limiting device, a signal amplifying circuit, a signal processing part, an audible and visual alarm and a display window. The heating wire is arranged at the bottom of the umbrella-shaped tray and is used for heating the tray; the weight sensing unit is arranged below a support of the tray, and when dust freely falls on the tray, the weight sensing unit outputs an increased voltage signal; the signal amplifying circuit is connected with the weight sensing unit and is used for amplifying the voltage signal; and the signal processing part is connected with the signal amplification circuit and is used for further processing the amplified signal to obtain accumulated dust quality information, displaying the accumulated dust quality information on a display window and uploading the accumulated dust quality information to a monitoring system, and when a detection value exceeds a specified threshold value, an audible and visual alarm sends out a warning signal. According to the invention, accurate detection of deposited dust in a complex and severe environment can be realized.

Description

Technical Field

[0001] The invention belongs to the technical field of coal mine dust accumulation quality detection, and relates to a device and method for detecting the quality of deposited coal dust in a coal mine. Background Art

[0002] During the production process of the mining and excavation working faces in coal mines, a large amount of dust is generated due to friction. The dust is diffused in the tunnel with the wind flow and gradually settles on the tunnel floor. Once there is an impact airflow, the deposited dust is lifted up again. On the one hand, the dust concentration in the tunnel increases, causing damage to the health of workers; on the other hand, the dust concentration reaches the lower explosion limit, which is prone to dust explosions and causes immeasurable losses. Therefore, the settled dust constitutes a major source of danger in coal mines, and the quality inspection of dust accumulation is urgent. However, there are relatively few sensors specifically designed to realize the quality inspection of dust accumulation in coal mines, and due to the influence of water spraying in coal mines, the detection error is relatively large.

[0003] Therefore, there is an urgent need for a device that can accurately detect the quality of coal dust deposited in coal mines to solve the problem that most existing devices for detecting the quality of deposited dust in dust conveying pipelines have a relatively simple structure, poor accuracy, and do not consider the influence of water vapor and water spray. Summary of the invention

[0004] In view of this, the purpose of the present invention is to provide a device and method for detecting the quality of deposited coal dust in coal mines. In view of the power consumption limitations, high humidity, frequent water spraying, high wind speed and other factors of underground equipment in coal mines, a low-power device, a dust-collecting device without water accumulation, a preheating device, a wind speed interference-free device, etc. are designed to achieve accurate detection of the dust quality in coal mine tunnels.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] A device for detecting the quality of deposited coal dust in a coal mine, comprising an umbrella-shaped tray 1, a heating wire 2, a weight sensing unit (6), a signal amplifying circuit 14 and a signal processing part;

[0007] The heating wire 2 is arranged at the bottom of the umbrella-shaped tray 1 to heat the umbrella-shaped tray 1; the weight sensing unit 6 is arranged under the bracket of the umbrella-shaped tray 1, and when the dust falls freely on the umbrella-shaped tray 1, the weight sensing unit 6 outputs an increased voltage signal; the signal amplifying circuit 14 is connected to the weight sensing unit 6 to amplify the voltage signal; the signal processing part is connected to the signal amplifying circuit 14 to further process the amplified signal to obtain the dust accumulation quality information and upload it to the monitoring system.

[0008] Preferably, the device further comprises an audible and visual alarm 15, which sends out a warning signal when the dust accumulation mass exceeds a specified threshold.

[0009] Preferably, the device further comprises a limiting device 9 installed below the weight sensing unit 6 to prevent damage to the weight sensing unit caused by external impact.

[0010] Preferably, the device further comprises a display window 12 for displaying dust accumulation quality information.

[0011] Preferably, the umbrella-shaped tray 1, heating wire 2, weight sensing unit 6, signal amplifying circuit 14, and limiting device 9 are all arranged in the detection unit housing 5, and the detection unit housing 5 is fixedly supported by the detection unit bracket 4; a detection unit handle 3 is designed on the top of the detection unit housing 5.

[0012] Preferably, the signal processing part and the signal amplifying circuit 14 are of separate structures, and are connected via a shielded wire 7; the sound and light alarm 15 and the display window 12 are of an integrated structure with the signal processing part.

[0013] Preferably, the signal processing flow of the signal processing part is as follows: first, the weight sensing unit 6 is initialized, the zero point of the device is read, and then the heating function of the umbrella-shaped tray 1 is turned on to preheat the tray for one hour. No data is read during the preheating period to ensure that the dust on the umbrella-shaped tray 1 is dried and then read. If the collected data reaches the full scale of the weight sensing unit 6 and the duration is very short, it means that the umbrella-shaped tray 1 has been washed, because the impact force generated during the water flow washing the tray makes the tray reach the full scale in a short time. If it takes a long time to reach the full scale, it is caused by excessive dust accumulation on the umbrella-shaped tray 1. At full scale, the information that the umbrella tray 1 needs to be cleaned is uploaded; after recognizing that the umbrella tray 1 is rinsed, the parameters are reinitialized, the umbrella tray 1 is heated for one hour, and after the residual water droplets of the umbrella tray 1 are evaporated, data detection is performed; then, the collected data is processed for the second time. Since dust sedimentation is a slow and continuous process, once the data with a very high increase value is output, it is regarded as a noise signal and discarded; finally, the collected data is stored for later query, the data is displayed on the device through the display window, and uploaded to the monitoring system to realize remote monitoring. If the test data exceeds the set threshold, an audible and visual alarm prompt is issued.

[0014] The beneficial effects of the present invention are:

[0015] (1) The detection device of the present invention can accurately detect deposited dust in complex and harsh environments such as spray water, high humidity, and high dust concentration. The structural design eliminates the influence of spray water and moisture in dust. In addition, a protective device is added to the equipment to avoid accidental damage to the device, thereby increasing the adaptability of the equipment to harsh environments. The specific structural improvements of the device of the present invention are:

[0016] a. The dust collecting tray is designed to be umbrella-shaped. Compared with the current disc-shaped dust collecting tray, the umbrella-shaped dust collecting tray does not accumulate water, and there is a heating wire at the bottom of the umbrella-shaped dust collecting tray to heat the umbrella-shaped tray. These two designs can eliminate the influence of accumulated water and moisture in the dust on the test results, and realize accurate detection of deposited dust.

[0017] b. The deposited dust detection unit and the signal processing part are designed separately. The detection unit can be placed on the tunnel floor, and the signal processing part can be hung on the tunnel roof, which facilitates the collection of deposited dust and the observation of detection data.

[0018] c. The dust collecting plate and weight sensing unit are placed in the cylinder, which reduces the impact of wind flow in the tunnel and avoids impact damage. There are drainage holes at the bottom to facilitate the removal of water from the tunnel.

[0019] d. A limit device is designed at the bottom of the weight sensing unit to prevent damage to the weight sensing unit caused by external impact.

[0020] (2) The present invention realizes automatic identification of the flushing status of the dust collecting plate surface of the sensor and automatic calibration of the zero point in the algorithm processing, and performs flushing detection on the dust accumulation quality after flushing, thereby reducing manual operations, and displays and stores the detection results of the sensor, and uploads the detection results to the monitoring system and outputs alarm information.

[0021] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

[0023] Figure 1 This is a schematic diagram of the structure of a device for detecting quality of deposited coal dust used in a coal mine according to the present invention;

[0024] Figure 2 This is a signal processing flow chart of the device for detecting quality of deposited coal dust in a coal mine according to the present invention;

[0025] Figure numerals: 1-umbrella-shaped tray, 2-heating wire, 3-detection unit handle, 4-detection unit bracket, 5-detection unit housing, 6-weight sensing unit, 7-shielding wire, 8-connecting wire, 9-limiting device, 10-tray bracket, 11-signal processing part housing handle, 12-display window, 13-signal processing part housing, 14-signal amplifying circuit, 15-sound and light alarm, 16-drainage hole. DETAILED DESCRIPTION

[0026] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0027] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0028] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0029] See also Figure 1-2 The present invention provides a device for detecting the quality of deposited coal dust in a coal mine. Figure 1 As shown, it specifically includes: an umbrella-shaped tray 1, a heating wire 2, a weight sensing unit 6, a limit device 9, a signal amplifying circuit 14, a signal processing part, an audible and visual alarm 15 and a display window 12.

[0030] The heating wire 2 is arranged at the bottom of the umbrella-shaped tray 1 to heat the umbrella-shaped tray 1; the weight sensing unit 6 is arranged under the bracket of the umbrella-shaped tray 1, and when the dust falls freely on the umbrella-shaped tray 1, the weight sensing unit 6 outputs an increased voltage signal; the signal amplifying circuit 14 is connected to the weight sensing unit 6 to amplify the voltage signal; the signal processing part is connected to the signal amplifying circuit 14 to further process the amplified signal to obtain the dust accumulation quality information, display it in the display window, and upload it to the monitoring system. When the detection value exceeds the specified threshold, the sound and light alarm sends a warning signal.

[0031] The limiting device 9 is installed below the weight sensing unit 6 to prevent the weight sensing unit from being damaged by external impact.

[0032] The signal processing part and the signal amplifying circuit 14 are of separate structures, and the two are connected by a shielded wire 7; the sound and light alarm 15 and the display window 12 are of an integrated structure with the signal processing part. The umbrella-shaped tray 1, the heating wire 2, the weight sensing unit 6, the signal amplifying circuit 14, and the limit device 9 are all arranged in the detection unit housing 5, and the detection unit housing 5 is fixedly supported by the detection unit bracket 4; the detection unit housing 5 is designed with a detection unit handle 3 on the top.

[0033] like Figure 2 As shown, the signal processing flow of the signal processing part is as follows: first, the weight sensing unit 6 is initialized, the zero point of the device is read, and then the heating function of the umbrella-shaped tray 1 is turned on to preheat the tray for one hour. No data is read during the preheating period to ensure that the dust on the umbrella-shaped tray 1 is dried and then read. If the collected data reaches the full scale of the weight sensing unit 6 and the duration is very short, it means that the umbrella-shaped tray 1 has been washed, because the impact force generated during the water flow washing the tray makes the tray reach the full scale in a short time. If it takes a long time to reach the full scale, it means that the umbrella-shaped tray 1 is full due to excessive dust accumulation. range, upload the information that the umbrella-shaped tray 1 needs to be cleaned; after identifying the flushing of the umbrella-shaped tray 1, reinitialize the parameters, heat the umbrella-shaped tray for one hour, evaporate the residual water droplets of the umbrella-shaped tray 1, and then perform data detection; then, the collected data is processed twice. Since dust sedimentation is a slow and continuous process, once the data with a very high increase value is output, it is regarded as a noise signal and discarded; finally, the collected data is stored for later query, the data is displayed on the device through the display window, and uploaded to the monitoring system to realize remote monitoring. If the test data exceeds the set threshold, an audible and visual alarm prompts.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. A device for detecting the quality of deposited coal dust in a coal mine, characterized in that: The device comprises an umbrella-shaped tray (1), a heating wire (2), a weight sensing unit (6), a signal amplifying circuit (14) and a signal processing part; The heating wire (2) is arranged at the bottom of the umbrella-shaped tray (1) to heat the umbrella-shaped tray (1); the weight sensing unit (6) is arranged under the bracket of the umbrella-shaped tray (1); when dust falls freely on the umbrella-shaped tray (1), the weight sensing unit (6) outputs an increased voltage signal; the signal amplifying circuit (14) is connected to the weight sensing unit (6) to amplify the voltage signal; the signal processing part is connected to the signal amplifying circuit (14) to further process the amplified signal to obtain dust accumulation quality information and upload it to the monitoring system.

2. The device for detecting the quality of deposited coal dust according to claim 1, characterized in that: The device also includes an audible and visual alarm (15), which sends out a warning signal when the dust accumulation mass exceeds a specified threshold.

3. The device for detecting the quality of deposited coal dust according to claim 1, characterized in that: The device also includes a limiting device (9) installed below the weight sensing unit (6) to prevent damage to the weight sensing unit caused by external impact.

4. The device for detecting the quality of deposited coal dust according to claim 1, characterized in that: The device also includes a display window (12) for displaying dust accumulation quality information.

5. The device for detecting the quality of deposited coal dust according to claim 3, characterized in that: The umbrella-shaped tray (1), the heating wire (2), the weight sensing unit (6), the signal amplifying circuit (14), and the limit device (9) are all arranged in a detection unit housing (5); the detection unit housing (5) is fixedly supported by a detection unit bracket (4); and a detection unit handle (3) is designed on the top of the detection unit housing (5).

6. The device for detecting the quality of deposited coal dust according to claim 2 or 4, characterized in that: The signal processing part and the signal amplifying circuit (14) are of separate structures and are connected via a shielded wire (7); the sound and light alarm (15) and the display window (12) are of an integrated structure with the signal processing part.

7. The device for detecting the quality of deposited coal dust according to claim 1, characterized in that: The signal processing flow of the signal processing part is as follows: first, the weight sensing unit (6) is initialized, the zero point of the device is read, and then the heating function of the umbrella-shaped tray (1) is turned on to preheat the tray for one hour. No data is read during the preheating period to ensure that the dust on the umbrella-shaped tray (1) is settled to the bottom and dried before reading the data. If the collected data reaches the full scale of the weight sensing unit (6) and the duration is very short, it means that the umbrella-shaped tray (1) has been washed, because the impact force generated during the process of water washing the tray makes the tray reach the full scale in a short time. If it takes a long time to reach the full scale, it is because too much dust is accumulated on the umbrella-shaped tray (1). When the scale reaches full scale, the information that the umbrella-shaped tray (1) needs to be cleaned is uploaded; after recognizing that the umbrella-shaped tray (1) needs to be rinsed, the parameters are reinitialized, the umbrella-shaped tray (1) is heated for one hour, and after the residual water droplets on the umbrella-shaped tray (1) are evaporated, data detection is performed; then, the collected data is processed for the second time. Since dust settling is a slow and continuous process, once the data with a very high increase value is output, it is regarded as a noise signal and is discarded; finally, the collected data is stored for later query, the data is displayed on the device through a display window, and uploaded to the monitoring system to realize remote monitoring. If the test data exceeds the set threshold, an audible and visual alarm prompt is issued.

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