Device and method for detecting water content in mine coal bunker

Abstract

The invention belongs to the technical field of coal bunker detection, and particularly relates to a device and method for detecting the water content in a mine coal bunker, the device comprises a constant-power heating body, a temperature measuring mechanism, an air temperature and humidity sensor and an electrical control box, the constant-power heating body is fixedly connected to the outer wall of a coal bunker body and used for heating the outer wall of the coal bunker body; the temperature measuring mechanism is used for detecting the temperature of a plurality of different height positions on the outer wall of the coal bunker body to obtain temperature measurement; the air temperature and humidity sensor is used for detecting the temperature and humidity of the periphery of the coal bunker body; the electric control box is used for determining a gradient threshold value according to the temperature measurement value, the temperature and the humidity to judge whether water exists in the coal bunker body or not. According to the method, whether the water content in different heights in the coal bunker body is excessive can be judged, operation guidance is provided for operators, the phenomenon of bunker collapse is reduced, the phenomenon of casualty accidents caused by the fact that accumulated coal in the coal bunker body bursts down is reduced, and the safety of the operators in coal mine coal bunker safety management is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of coal bunker detection, and in particular relates to a device and a detection method for detecting the water content in a coal bunker of a mine. Background Art

[0002] With the rapid development of coal enterprise concentration and mechanization, the production capacity of coal mining faces, production areas and mines has been greatly improved; due to the great changes in the production capacity of coal mining faces and production areas, the transportation systems and equipment operation links cannot be coordinated, so the mine coal bunker has become the main coal loading and storage link to stabilize the mine production. It plays a vital role in ensuring the quality of coal products, adjusting the imbalance of production, transportation and sales, and ensuring the continuous and stable production of mines.

[0003] The underground coal bunker is a transfer chamber used to transport underground coal to the ground. Its structural form is related to factors such as the layout of the development system and the underground loading method.

[0004] In recent years, with the continuous development of underground mechanization and intelligent construction, the production capacity of many coal mining areas has been greatly improved. The underground transportation systems and equipment operation links of some coal mines cannot operate in a coordinated manner, especially the management is not in place, resulting in problems such as coal bunker blockage and bunker collapse.

[0005] The blockage and collapse of coal bunkers are bottlenecks that hinder the further improvement of production capacity of working faces and mines. The collapse of coal bunkers is mainly due to the accumulation of a large amount of water-containing coal in the coal bunker. It is difficult for the coal feeder to control the coal discharge speed and amount when discharging coal, resulting in a large amount of coal and accumulated water in the coal bunker gushing out instantly, causing the coal discharging equipment to be rushed into the tunnel. This is also called the "eye-bursting" phenomenon. In the coal production process, especially after the mine is shut down for maintenance, there will be a large amount of water-coal in the coal bunker. After the coal feeder is turned on, the water-coal will burst instantly, causing coal sludge to accumulate in front of the coal feeder, burying the tunnel and belt. If there are operating personnel around them, once the accumulated coal in the bunker rushes down, it is very easy to cause casualties.

[0006] One of the main reasons for coal bunker collapse is the presence of water in the coal bunker and dry coal at the bottom of the bunker. The coal feeder cannot effectively control the amount of coal during the coal discharge process. Therefore, in order to reduce the phenomenon of coal bunker collapse in coal mines, this technical solution proposes a device and a detection method for detecting the water content in the coal bunker of a mine, to determine whether there is too much water content at different heights in the coal bunker body, and to provide operating guidance for operators. Summary of the invention

[0007] The purpose of the present invention is to provide a device and a method for detecting the water content in a coal bunker in a mine, which can determine whether the water content at different heights in the coal bunker body is too much, provide operation guidance for operators, reduce the coal bunker collapse phenomenon in coal mines, reduce the phenomenon of coal accumulated in the coal bunker body rushing down and causing casualties, and improve the safety of operators in the safety management of coal bunkers in coal mines.

[0008] The technical solution adopted by the present invention is as follows:

[0009] A device for detecting the water content in a coal bunker of a mine, comprising:

[0010] The constant power heating element is fixedly connected to the outer wall of the coal bunker body and is used to heat the outer wall of the coal bunker body;

[0011] The temperature measuring mechanism is used to detect the temperature at multiple different height positions on the outer wall of the coal bunker to obtain temperature measurement;

[0012] Air temperature and humidity sensor, used to detect the temperature and humidity around the coal bunker;

[0013] Electrical control box;

[0014] The electrical control box is used to determine the gradient threshold value according to the temperature and humidity measured by the air temperature and humidity sensor;

[0015] The electrical control box is used to calculate the temperature gradient of the outer wall of the coal bunker body according to the temperature measurement value measured by the temperature measuring mechanism, and compare the temperature gradient with the gradient threshold value to determine whether there is water in the coal bunker body.

[0016] Furthermore, thermally conductive silica gel is applied between the coal bin body and the constant power heating element.

[0017] Furthermore, the constant power heating element is fixedly connected to the outer wall of the metal cone at the lower part of the coal bunker body.

[0018] Furthermore, the temperature measuring mechanism is a temperature sensor or a thermal imager.

[0019] Furthermore, there are multiple temperature sensors, and the multiple temperature sensors are fixedly connected to the constant power heating element at equal intervals in order from top to bottom.

[0020] A method for detecting the water content in a coal bunker of a mine comprises the following steps:

[0021] Step 1: Start the constant power heating element to heat the outer wall of the coal bunker;

[0022] Step 2: The temperature at multiple different height positions of the outer wall of the coal bunker is detected by a temperature measuring mechanism to obtain temperature measurement values ​​at multiple different height positions of the outer wall of the coal bunker;

[0023] Step 3: Measure the temperature and humidity around the coal bunker body through an air temperature and humidity sensor;

[0024] Step 4: Determine the gradient threshold value according to the temperature and humidity around the coal bunker body through the electrical control box;

[0025] Step 5: Calculate the temperature gradient of the outer wall of the coal bunker through the electrical control box according to the temperature measurement values ​​at multiple different height positions of the outer wall of the coal bunker;

[0026] Step 6: Compare the temperature gradient with the gradient threshold value through the electrical control box to determine whether there is water in the coal bunker body and output the status.

[0027] The technical effects achieved by the present invention are:

[0028] The device and method for detecting the water content in a coal bunker of a mine of the present invention heat the outer wall of the coal bunker body by setting a constant power heating element, thereby expanding the temperature difference between the presence of water level and the absence of water level. The device and method can directly determine whether the water content at different heights in the coal bunker body is excessive by detecting the temperature of the coal bunker body, thereby providing operation guidance for operators and reducing the bunker burst phenomenon. When the water content exceeds the set threshold, it is necessary to wait for the coal bunker body to control the moisture before releasing the coal, thereby reducing the phenomenon of casualties caused by the coal accumulated in the coal bunker body rushing down, thereby improving the safety of operators in the safety management of coal bunkers in coal mines. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of the present invention.

[0030] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0031] 1. Coal bunker body; 2. Constant power heating element; 3. Temperature sensor; 4. Air temperature and humidity sensor; 5. Electrical control box. DETAILED DESCRIPTION

[0032] In order to make the purpose and advantages of the present invention more clearly understood, the present invention is specifically described below in conjunction with embodiments. It should be understood that the following text is only used to describe one or several specific embodiments of the present invention, and does not strictly limit the scope of protection of the specific claims of the present invention.

[0033] like Figure 1 As shown, a device for detecting the water content in a coal bunker of a mine comprises a constant power heating element 2, a temperature measuring mechanism, an air temperature and humidity sensor 4 and an electrical control box 5;

[0034] The constant power heating element 2 is fixedly connected to the outer wall of the coal bin body 1. Since the water inside the coal bin body 1 will be concentrated on the outer wall of the metal cone cylinder at the lower part of the coal bin body 1, the constant power heating element 2 is preferably fixedly connected to the outer wall of the metal cone cylinder at the lower part of the coal bin body 1, so that the detection area of ​​the detection device can be concentrated on the metal cone cylinder at the lower part of the coal bin body 1, and is preferably fixedly connected to heat the outer wall of the coal bin body 1.

[0035] Here, the coal bin body 1 and the constant power heating element 2 are installed closely together. If necessary, thermal conductive silicone or the like can be applied between the coal bin body 1 and the constant power heating element 2 to assist heat conduction. The constant power heating element 2 operates at a constant temperature, and the wall of the coal bin body 1 absorbs heat. Due to the difference in specific heat capacity between water and coal, there is a difference in the amount of heat absorbed when there is water level and when there is no water level in the coal bin body 1. The difference can be used to determine whether there is water level or not.

[0036] The temperature measuring mechanism is used to detect the temperature at multiple different height positions of the outer wall of the coal bunker body 1 to obtain temperature measurement values;

[0037] The temperature measuring mechanism may be a temperature sensor 3 or a thermal imager. The thermal imager can observe the overall surface temperature of the coal bunker body 1 and can visually observe the temperature difference, that is, the water level.

[0038] Among them, the number of temperature sensors 3 is 1 to 16, preferably 3 to 16. Multiple temperature sensors 3 are fixedly connected to the constant power heating element 2 at equal intervals in order from top to bottom. By detecting the temperature at different heights of the outer wall of the coal bin body 1 through multiple temperature sensors 3, the temperature difference, that is, the water level, can be determined.

[0039] The air temperature and humidity sensor 4 is used to detect the temperature and humidity around the coal bunker body 1, and determine the threshold value of the temperature gradient that can be used according to the temperature and humidity of the air.

[0040] The electrical control box 5 is used to determine the gradient threshold value according to the temperature and humidity measured by the air temperature and humidity sensor 4, that is, the temperature value at the connection point with water level and without water level inside the coal bunker body 1. The water level height value can be calculated through the equidistant distribution value of the temperature sensor and the temperature difference quantity.

[0041] The electrical control box 5 is used to calculate the temperature gradient of the outer wall of the coal bin body 1 according to the temperature measurement value measured by the temperature measuring mechanism, and compare it with the gradient threshold value, so as to determine whether there is water in the coal bin body 1, and output the state. There are two output states: on and off, which correspond to the two states of "water" and "no water" in the coal bin body 1 respectively.

[0042] Here, the electrical control box 5 receives AC127V power supply, outputs 4-20mA and RS485 signals to the outside, and the electrical control box 5 is electrically connected to the constant power heating element 2 and the air temperature and humidity sensor 4, so that the electrical control box 5 supplies power to the constant power heating element 2 and the air temperature and humidity sensor 4, receives the working data of the constant power heating element 2, and collects data from these air temperature and humidity sensors 4 through the bus.

[0043] A method for detecting the water content in a coal bunker in a mine, using the above-mentioned device for detecting the water content in a coal bunker body 1 in a mine, comprises the following steps:

[0044] Step 1: Start the constant power heating element 2 to heat the outer wall of the coal bunker body 1;

[0045] Step 2: Detect the temperature at multiple different height positions of the outer wall of the coal bunker body 1 by a temperature measuring mechanism to obtain temperature measurement values ​​at multiple different height positions of the outer wall of the coal bunker body 1;

[0046] Step 3: Measure the temperature and humidity of the coal bunker body 1 by using the air temperature and humidity sensor 4;

[0047] Step 4: Determine the gradient threshold value according to the temperature and humidity around the coal bunker body 1 through the electrical control box 5;

[0048] Step 5: Calculate the temperature gradient of the outer wall of the coal bunker body 1 through the electrical control box 5 according to the temperature measurement values ​​at multiple different height positions of the outer wall of the coal bunker body 1;

[0049] Step 6: The temperature gradient is compared with the gradient threshold value through the electrical control box 5 to determine whether there is water in the coal bunker body 1 and output the status.

[0050] In summary, this technical solution heats the outer wall of the coal bunker body 1 by setting a constant power heating element 2, thereby expanding the temperature difference between the presence of water level and the absence of water level, and can directly determine whether there is too much water content at different heights in the coal bunker body 1 by detecting the temperature of the coal bunker body 1, provide operation guidance for operating personnel, and reduce bunker bursting. When the water content exceeds the set threshold, it is necessary to wait for the coal bunker body 1 to control the moisture before releasing the coal, thereby reducing the phenomenon of coal accumulation in the coal bunker body 1 rushing down and causing casualties, thereby improving the safety of operating personnel in the safety management of coal bunkers in coal mines, with good dredging effect, low investment cost, simple repair and maintenance, and no threat to personnel safety. It is very suitable for use in vertical coal bunkers, and is an ideal and effective method for preventing and dealing with coal bunker bursting, which can provide strong guarantees for safe and efficient production in the coal mining industry.

[0051] The above is only a preferred embodiment of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principles of the present invention, and these improvements and modifications should also be considered as the protection scope of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the art unless otherwise specified and limited.

Claims

1. A device for detecting the water content in a coal bunker of a mine, characterized in that: include: A constant power heating element (2) is fixedly connected to the outer wall of the coal bunker body (1) and is used to heat the outer wall of the coal bunker body (1); A temperature measuring mechanism is used to detect the temperature at multiple locations at different heights on the outer wall of the coal bunker body (1) to obtain temperature measurements; An air temperature and humidity sensor (4) is used to detect the temperature and humidity around the coal bunker body (1); Electrical control box (5); The electrical control box (5) is used to determine the gradient threshold value according to the temperature and humidity measured by the air temperature and humidity sensor (4); The electrical control box (5) is used to calculate the temperature gradient of the outer wall of the coal bunker body (1) based on the temperature measurement value measured by the temperature measuring mechanism, and compare the temperature gradient with the gradient threshold value to determine whether there is water in the coal bunker body (1).

2. A device for detecting water content in a coal bunker in a mine according to claim 1, characterized in that: Thermally conductive silica gel is applied between the coal bin body (1) and the constant power heating element (2).

3. The device for detecting water content in a coal bunker in a mine according to claim 1, characterized in that: The constant power heating element (2) is fixedly connected to the outer wall of the metal cone cylinder at the lower part of the coal bunker body (1).

4. The device for detecting water content in a coal bunker in a mine according to claim 1, characterized in that: The temperature measuring mechanism is a temperature sensor (3) or a thermal imager.

5. The device for detecting water content in a coal bunker in a mine according to claim 1, characterized in that: There are a plurality of temperature sensors (3), and the plurality of temperature sensors (3) are fixedly connected to the constant power heating element (2) at equal intervals in a sequence from top to bottom.

6. The device for detecting water content in a coal bunker in a mine according to claim 1, characterized in that: The number of the temperature sensors (3) is 3 to 16.

7. The device for detecting water content in a coal bunker in a mine according to claim 1, characterized in that: The electrical control box (5) is powered by AC127V and outputs 4-20mA and RS485 signals.

8. A method for detecting the water content in a coal bunker in a mine, using the device for detecting the water content in a coal bunker body (1) in a mine as claimed in any one of claims 1 to 7, characterized in that: The following steps are involved: Step 1: Start the constant power heating element (2) to heat the outer wall of the coal bunker body (1); Step 2: Using a temperature measuring mechanism, the temperature at multiple different height positions of the outer wall of the coal bunker body (1) is detected to obtain temperature measurement values ​​at multiple different height positions of the outer wall of the coal bunker body (1); Step 3: Measure the temperature and humidity around the coal bunker body (1) using an air temperature and humidity sensor (4); Step 4: Determine the gradient threshold value according to the temperature and humidity around the coal bunker body (1) through the electrical control box (5); Step 5: Calculate the temperature gradient of the outer wall of the coal bunker body (1) through the electrical control box (5) based on the temperature measurement values ​​at multiple different height positions of the outer wall of the coal bunker body (1); Step 6: The temperature gradient is compared with the gradient threshold value through the electrical control box (5), and it is determined whether there is water in the coal bunker body (1), and the status is output.

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