A collection device for coal sample detection in mines

Abstract

The present invention relates to the technical field of coal sample detection in mines, and in particular to a collection device for coal sample detection in mines. The device includes a data acquisition module and a bidirectional airflow module, and the bidirectional airflow module includes an airflow regulating device; the data acquisition module is used to obtain different types of parameter data in the external protection drill pipe at each moment in the current time period, and the current time period is the time period in the process of coal sampling in mines; the airflow regulating device is used to process the acquired parameter data, and determine the degree of blockage in the external protection drill pipe in the current time period; based on the degree of blockage in the external protection drill pipe in the current time period, the intensity of the input airflow at the next moment is determined and adjusted accordingly. The present invention realizes real-time clearing of blockage in the collection device for coal sample detection in mines.

Description

Technical Field

[0001] The invention relates to the technical field of mine coal sample detection, and in particular to a collection device for mine coal sample detection. Background Art

[0002] As an important energy source and industrial raw material, the quality and properties of coal directly affect the use effect and stability of the production process. By testing coal samples, we can ensure that the coal quality meets the requirements of combustion, power generation, metallurgy and other industrial uses. At the same time, we can optimize the combustion or processing process, reduce energy consumption, reduce emissions, and help control costs and increase equipment service life.

[0003] In order to obtain more accurate coal sample detection results, it is particularly important to collect coal sample detection samples in mines. Efficient and stable sampling capabilities can greatly improve the effect of coal sample detection, so that operations can be carried out more targeted, such as correctly selecting and using excavation tools, and reasonably arranging sampling frequencies. A new type of coal sample collection device (publication number CN102706690B) is proposed in the existing invention patent. The device is divided into two working states during use, namely, the feeding state and the sampling state. By controlling the airflow redirection mechanism, the gas flow in the outer protective drill pipe and the sampling drill pipe is controlled, so as to cool the blade and clean the sampling tube. It has the advantages of simple structure, easy operation, and good coal sample collection effect. However, the device still has room for further improvement in the sampling process.

[0004] When the equipment enters the sampling state, the outer protective drill pipe continues to output airflow to cool the cutter. However, when the sampling rate of the equipment is too high, the contact frequency between the blade and the coal seam increases, which may produce more coal powder. If the removal capacity of the airflow does not increase accordingly with the increase in the sampling rate, it may cause the coal powder to accumulate inside the outer protective drill pipe, causing blockage, resulting in a decrease in the cooling effect of the cutter, and ultimately reducing the sampling efficiency of the equipment, and even causing damage to the cutter. Summary of the invention

[0005] In order to solve the problem of blockage in the existing mining coal sample collection device during the sampling process, the purpose of the present invention is to provide a mining coal sample collection device, and the technical solution adopted is as follows:

[0006] The present invention provides a collection device for coal sample detection in a mine, the collection device for coal sample detection in a mine comprises a data collection module and a bidirectional airflow module, the bidirectional airflow module comprises an airflow regulating device;

[0007] The data acquisition module is used to obtain different types of parameter data in the external protection drill pipe at each moment in the current time period, wherein the parameter data includes pressure and flow rate, and the current time period is the time period during the coal sampling process in the mine;

[0008] The airflow regulating device is used to obtain the degree of airflow circulation in the protective drill pipe outside the current time period by combining the overall distribution of the discrete degree of pressure and the discrete degree of flow rate in the current time period, as well as the consistency of the discrete degrees of different types of parameter data; if the overall distribution of the reasonable degree corresponding to all moments in the current time period does not meet the preset conditions, then the degree of blockage in the protective drill pipe outside the current time period is determined based on the overall distribution of the reasonable degree corresponding to all moments in the current time period and the degree of airflow circulation in the protective drill pipe outside the current time period; the reasonable degree is determined based on the parameter data and the corresponding standard bearing range; based on the blockage degree in the protective drill pipe outside the current time period, the intensity of the input airflow at the next moment is determined and adjusted accordingly.

[0009] Preferably, the bidirectional airflow module further includes a bidirectional airflow channel, a gas diverter and a filter.

[0010] Preferably, the collection device for detecting coal samples in mines also includes a wind source providing module.

[0011] Preferably, after determining the intensity of the input airflow at the next moment and making corresponding adjustments, the method further includes:

[0012] Collect different types of parameter data in the external protection drill pipe at each moment in the next time period;

[0013] Calculate the blockage degree in the external protection drill pipe in the next time period according to different types of parameter data in the external protection drill pipe at each moment in the next time period;

[0014] The difference between the blockage degree in the protection drill pipe outside the next time period and the blockage degree in the protection drill pipe outside the current time period is recorded as the blockage degree change value; the ratio between the blockage degree change value and the time interval is taken as the change rate of the blockage degree; the time interval is the time difference between the middle moment of the current time period and the middle moment of the next time period;

[0015] When the blockage degree change value is less than the preset change threshold and the blockage degree in the drill pipe in the next time period is greater than the preset first threshold, the airflow mode of the equipment is adjusted to two-way airflow clearing.

[0016] Preferably, the step of combining the overall distribution of the discrete degree of pressure and the discrete degree of flow velocity in the current time period and the consistency of the discrete degrees of different types of parameter data to obtain the degree of airflow in the protective drill pipe outside the current time period includes:

[0017] The sum of the discrete degrees of pressure at all times in the current time period and the discrete degrees of flow rate at all times in the current time period is recorded as the first characteristic value of the current time period; the maximum discrete degree and the average discrete degree of all types of parameter data at all times in the current time period are obtained;

[0018] According to the difference between the maximum value of the discrete degree and the average value of the discrete degree, and the first eigenvalue of the current time period, the degree of airflow circulation in the protective drill pipe outside the current time period is obtained; the difference between the maximum value of the discrete degree and the average value of the discrete degree and the first eigenvalue of the current time period are both negatively correlated with the degree of airflow circulation.

[0019] Preferably, obtaining the reasonableness corresponding to each moment in the current time period includes:

[0020] For any parameter data, the difference between the upper limit of the standard tolerance range corresponding to the parameter data and the parameter data at the candidate moment is recorded as the first difference, and the difference between the lower limit of the standard tolerance range corresponding to the parameter data and the parameter data at the candidate moment is recorded as the second difference; the normalized result of the product of the first difference and the second difference is used as the reasonable evaluation value of the parameter data at the candidate moment;

[0021] The average of the reasonable evaluation values ​​of all types of parameter data at the candidate time is taken as the reasonable degree corresponding to the candidate time;

[0022] The candidate time is any time in the current time period.

[0023] Preferably, if the overall distribution of the reasonableness corresponding to all moments in the current time period does not meet the preset condition, determining the blockage degree in the protective drill pipe outside the current time period according to the overall distribution of the reasonableness corresponding to all moments in the current time period and the airflow circulation degree in the protective drill pipe outside the current time period includes:

[0024] The maximum value of the rationality corresponding to all moments in the current time period is taken as the comprehensive rationality of the current time period;

[0025] If the comprehensive rationality of the current time period is greater than 0, the blockage degree in the protective drill pipe outside the current time period is obtained based on the comprehensive rationality and the airflow circulation degree in the protective drill pipe outside the current time period. The comprehensive rationality and the airflow circulation degree in the protective drill pipe outside the current time period are negatively correlated with the blockage degree in the protective drill pipe outside the current time period.

[0026] Preferably, if the comprehensive rationality of the current time period is less than or equal to 0, the intensity of the input airflow is not adjusted.

[0027] Preferably, the step of determining the intensity of the input airflow at the next moment based on the blockage degree in the protective drill pipe outside the current time period and making corresponding adjustments includes:

[0028] If the blockage degree in the protective drill pipe outside the current time period is less than or equal to the preset first threshold, the intensity of the input airflow is not adjusted;

[0029] If the blockage degree in the protective drill pipe outside the current time period is greater than a preset first threshold value and less than or equal to a preset second threshold value, the difference between the maximum value of the intensity of the allowed input airflow and the intensity of the current input airflow is calculated and recorded as the intensity difference; the product of the intensity difference and the blockage degree in the protective drill pipe outside the current time period is recorded as the first product; the minimum value of the sum of the first product and the intensity of the current input airflow and the maximum value of the intensity of the allowed input airflow is taken as the intensity of the input airflow at the next moment, and the airflow regulating device adjusts the intensity of the input airflow at the next moment; the preset first threshold value is less than the preset second threshold value;

[0030] If the degree of blockage in the protective drill pipe outside the current time period is greater than the preset second threshold, the intensity of the input airflow at the next moment is determined based on the intensity difference, the degree of blockage in the protective drill pipe outside the current time period and the comprehensive rationality of the current time period, and the airflow regulating device adjusts the intensity of the input airflow at the next moment.

[0031] Preferably, the intensity of the input airflow at the next moment is determined according to the intensity difference, the blockage degree in the protective drill pipe outside the current time period and the comprehensive rationality of the current time period, including:

[0032] The sum of the intensity difference and the blockage degree in the protective drill pipe outside the current time period is recorded as the first sum, and the product of the first sum and the blockage degree in the protective drill pipe outside the current time period is recorded as the second product; the minimum value of the sum of the second product and the current input airflow intensity and the maximum value of the allowed input airflow intensity is taken as the input airflow intensity at the next moment.

[0033] The present invention has at least the following beneficial effects:

[0034] The mining coal sample detection collection device provided by the present invention adds a two-way airflow module on the basis of the existing device, and releases high-pressure gas in the opposite direction of the normal airflow into the external protective drill pipe, thereby breaking up the coal ash blocked therein and blowing it out of the device by the normal airflow, thereby ensuring the cooling ability of the blade during the working process and improving the anti-blocking ability of the equipment. The data acquisition module of the mining coal sample detection collection device provided by the present invention is used to collect different types of parameter data in the external protective drill pipe, and the airflow adjustment device is used to analyze the overall distribution of the reasonable degree corresponding to all moments in the current time period. When an unreasonable situation occurs, the blockage degree in the external protective drill pipe is judged according to the overall distribution of the reasonable degree corresponding to all moments in the current time period and the airflow circulation degree in the external protective drill pipe in the current time period. Further, based on the blockage degree in the protective drill pipe, the intensity of the input airflow at the next moment is determined and adjusted accordingly, thereby realizing real-time unblocking of the mining coal sample detection collection device, and applying airflows of different intensities for different blockage situations, thereby reducing energy consumption and reducing equipment loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions and advantages in the embodiments of the present invention or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 A schematic diagram of the overall mechanical structure of a collection device for coal sample detection in a mine provided by an embodiment of the present invention;

[0037] Figure 2 A schematic diagram of a first axial side of a ventilation core shaft of a collection device for coal sample detection in a mine provided by an embodiment of the present invention;

[0038] Figure 3 A schematic diagram of a second axial side of a ventilation core shaft of a collection device for coal sample detection in a mine provided by an embodiment of the present invention;

[0039] Figure 4 A schematic diagram of the structure of a sliding sleeve of a collection device for coal sample detection in a mine provided by an embodiment of the present invention;

[0040] Figure 5 A schematic diagram of the third axis side of a ventilation core shaft of a collection device for coal sample detection in a mine provided by an embodiment of the present invention;

[0041] Figure 6 A schematic diagram of a data processing flow corresponding to a collection device for coal sample detection in a mine provided by an embodiment of the present invention;

[0042] In the figure: 1 is the sampling drill bit; 2 is the blade; 3 is the outer protective drill pipe; 6 is the pressure regulating nut; 7 is the air flow reversing compression spring; 8 is the ventilation core shaft; 81 is the guide hole; 82 is the outgoing air hole; 83 is the reversing air outlet hole; 84 is the reversing air inlet hole; 85 is the stepped hole; 86 is the front cavity; 87 is the rear cavity; 88 is the first air flow valve; 89 is the second air flow valve; 9 is the sliding sleeve; 91 is the ventilation groove; 92 is the pipeline; 10 is the external threaded sleeve; 11 is the drill pipe connecting sleeve; 112 is the stop pin groove; 13 is the stop pin; 14 is the stop pin reset spring, and c and A are directions. DETAILED DESCRIPTION

[0043] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, a collection device for detecting coal samples in a mine proposed by the present invention is described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0044] Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

[0045] The specific scheme of the collection device for coal sample detection in a mine provided by the present invention is described in detail below with reference to the accompanying drawings.

[0046] An embodiment of a collection device for detecting coal samples in mines:

[0047] See also Figure 1 , which shows a collection device for coal sample detection in a mine provided by an embodiment of the present invention, such as Figure 1-Figure 5 As shown, Figure 1 This is a schematic diagram of the overall mechanical structure of the collection device for coal sample detection in mines. Figure 2 , Figure 3 and Figure 5 They are respectively a first axial side schematic diagram, a second axial side schematic diagram and a third axial side schematic diagram of a ventilation core shaft 8 of a collection device for coal sample detection in a mine, Figure 4The present invention is a schematic diagram of the structure of the sleeve 9 of the collection device for coal sample detection in mines; wherein, 1 is a sampling drill bit; 2 is a blade; 3 is an outer protective drill pipe; 6 is a pressure-adjusting nut; 7 is an airflow reversing compression spring; 8 is a ventilation core shaft; 81 is a guide hole; 82 is an outgoing air hole; 83 is a reversing air outlet hole; 84 is a reversing air inlet hole; 85 is a stepped hole; 86 is a front cavity; 87 is a rear cavity; 88 is a first airflow valve; 89 is a second airflow valve; 9 is a sleeve; 91 is a ventilation groove; 92 is a pipeline; 10 is an external threaded sleeve; 11 is a drill rod connecting sleeve; 112 is a stop pin groove; 13 is a stop pin; 14 is a stop pin reset spring, and c and A are directions. The mining coal sample detection collection device is an improvement made on the basis of the existing coal sample collection device (publication number CN102706690B), and the improvement is as follows: the mining coal sample detection collection device includes a data acquisition module, a two-way airflow module and a wind source providing module, and the two-way airflow module includes an airflow regulating device, a two-way airflow channel, a gas diverter and a filter; the airflow regulating device: installed at the entrance of the rear cavity of the equipment, used to adjust the gas flow entering the equipment. Bidirectional airflow channel: the radius of the equipment is appropriately widened, and the gas channel of the existing outer protective drill pipe 3 is changed to a two-way airflow channel. The gas diverter: installed at the entrance of the gas channel of the inner and outer protective drill pipes 3 of the rear cavity, the airflow entering the equipment is divided into two directions. The filter: installed on the gas diverter, used to block coal ash or external dust, etc., to prevent it from entering the equipment. The data acquisition module includes different types of sensors. In this embodiment, the data acquisition module includes a temperature sensor, a pressure sensor and a flow rate sensor, wherein the temperature sensor: installed at the end of the blade 2 of the equipment, used to detect the temperature of the blade 2 during operation. Pressure sensor (installed in parallel at multiple positions): installed on the inner surface of the outer protection drill pipe 3, used to detect the gas pressure level at different positions inside the outer protection drill pipe 3. Flow rate sensor (installed in parallel at multiple positions): installed on the inner surface of the outer protection drill pipe 3, used to detect the gas flow rate at different positions inside the outer protection drill pipe 3. The wind source providing module includes a high-pressure fan, which is used as the air source to ensure that sufficient pressure and gas flow can be provided.

[0048] The data acquisition module is used to obtain different types of parameter data in the external protection drill pipe 3 at each moment in the current time period, wherein the parameter data include pressure and flow rate. The current time period is the time period during the coal sampling process in the mine.

[0049] The purpose of the present invention is to analyze the data fed back by the sensor, obtain in real time the blockage situation inside the outer protective drill rod of the equipment during the sampling process, and adjust the airflow clearing mode in time, so as to improve the clearing efficiency of the equipment, improve the sampling efficiency and reduce the possibility of equipment damage.

[0050] When the device enters the sampling state, the sensor is started, and the data acquisition module collects different types of parameter data in the outer protective drill pipe 3 in real time. The parameter data collected in this embodiment include pressure, flow rate and temperature. In specific applications, the implementer can select and collect according to specific conditions. In this embodiment, parameter data is collected once per second, that is, one pressure data, one flow rate data and one temperature data are collected every second. In specific applications, the implementer can set the collection frequency of parameter data according to the lifting situation.

[0051] At this point, different types of parameter data in the external protective drill pipe 3 at each moment in the current time period are obtained. The current time period is a set of all historical moments whose time intervals with the current moment are less than or equal to the preset time length. In this embodiment, the preset time length is 5 minutes. In specific applications, the implementer can set it according to the specific situation.

[0052] The airflow regulating device is used to obtain the degree of airflow circulation in the protective drill pipe 3 outside the current time period by combining the overall distribution of the discrete degree of pressure and the discrete degree of flow rate in the current time period, as well as the consistency of the discrete degrees of different types of parameter data; if the overall distribution of the reasonable degree corresponding to all moments in the current time period does not meet the preset conditions, then the degree of blockage in the protective drill pipe 3 outside the current time period is determined based on the overall distribution of the reasonable degree corresponding to all moments in the current time period and the degree of airflow circulation in the protective drill pipe 3 outside the current time period; the reasonable degree is determined based on the parameter data and the corresponding standard bearing range; based on the blockage degree in the protective drill pipe 3 outside the current time period, the intensity of the input airflow at the next moment is determined and adjusted accordingly.

[0053] First, the degree of dispersion of each parameter data at all moments in the current time period is obtained according to each parameter data at each moment in the current time period; the degree of dispersion can be characterized by indicators such as variance, standard deviation, and data range. In this embodiment, the degree of dispersion is characterized by variance. Specifically, for any type of parameter data, the variance of the parameter data at each moment in the current time period is calculated as the degree of dispersion of the parameter data at all moments in the current time period.

[0054] The sum of the discrete degrees of pressure at all times in the current time period and the discrete degrees of flow velocity at all times in the current time period is recorded as the first characteristic value of the current time period; the maximum discrete degree and the average discrete degree of all types of parameter data at all times in the current time period are obtained. According to the difference between the maximum discrete degree and the average discrete degree, and the first characteristic value of the current time period, the airflow degree in the protective drill pipe 3 outside the current time period is obtained; the difference between the maximum discrete degree and the average discrete degree and the first characteristic value of the current time period are both negatively correlated with the airflow degree.

[0055] Among them, the negative correlation relationship means that the dependent variable will decrease as the independent variable increases, and the dependent variable will increase as the independent variable decreases. It can be a subtraction relationship, a division relationship, etc., which is determined by practical applications.

[0056] In this embodiment, a specific calculation formula for the airflow degree is given. The airflow degree in the protective drill pipe 3 outside the current time period can be expressed as:

[0057]

[0058] Wherein, W represents the degree of airflow in the protective drill pipe 3 outside the current time period, Indicates the discrete degree of pressure at all times in the current time period. Indicates the discrete degree of flow rate at all times in the current time period. Indicates the maximum discrete degree of all types of parameter data at all times in the current time period. It represents the average value of the discrete degree of all types of parameter data at all times in the current time period. Indicates the preset first adjustment parameter, Indicates the absolute value sign.

[0059] In this embodiment, the preset first adjustment parameter is introduced into the calculation formula of the air flow degree in order to prevent the denominator from being 0. In this embodiment, the preset first adjustment parameter is 0.01. In specific applications, the implementer can set it according to the specific situation. It indicates the first eigenvalue of the current time period. The smaller the first eigenvalue of the current time period is, the less discrete the discrete degree of pressure and the discrete degree of flow velocity in the current time period is as a whole. It is used to reflect the difference between the maximum discrete degree and the average discrete degree of all types of parameter data at all times in the current time period. The smaller the first characteristic value of the current time period, and the smaller the difference between the maximum discrete degree and the average discrete degree of all types of parameter data at all times in the current time period, the higher the consistency of all types of parameter data in the current time period, that is, the more uniform the airflow velocity at all positions in the outer protective drill pipe 3, and the higher the gas circulation degree.

[0060] Next, this embodiment is described by taking any moment in the current time period as an example, and the method provided in this embodiment can be used to process other moments.

[0061] Specifically, any moment in the current time period is recorded as a candidate moment. For any parameter data, the standard tolerance range corresponding to the parameter data is , set the upper limit of the standard tolerance range corresponding to this parameter data The difference between the parameter data at the candidate time and the first difference is recorded as the lower limit of the standard tolerance range corresponding to the parameter data. The difference between the parameter data at the candidate moment and the parameter data at the candidate moment is recorded as the second difference; the normalized result of the product of the first difference and the second difference is used as the reasonable evaluation value of the parameter data at the candidate moment. The above method can obtain a reasonable evaluation value for each parameter data at the candidate moment, that is, each type of parameter data at this moment corresponds to a reasonable evaluation value. The average value of the reasonable evaluation values ​​of all types of parameter data at the candidate moment is used as the reasonable degree corresponding to the candidate moment. It should be noted that each type of parameter data has its corresponding standard tolerance range, and the standard tolerance range is set artificially.

[0062] The rationality corresponding to the i-th moment in the current time period can be expressed as:

[0063]

[0064] in, It indicates the rationality of the i-th moment in the current time period, K indicates the number of types of parameter data, Indicates the upper limit of the standard tolerance range corresponding to the parameter data of the kth type, Indicates the lower limit of the standard tolerance range corresponding to the parameter data of the kth type, represents the parameter data of the kth category at the i-th moment in the current time period, and norm() represents the normalization function.

[0065] represents the first difference, Indicates the second difference, when the parameter is within the standard tolerance range On the contrary, when the parameter is outside the standard tolerance range .

[0066] By adopting the above method, the rationality corresponding to each moment in the current time period can be obtained, and the maximum value of the rationality corresponding to all moments in the current time period is taken as the comprehensive rationality of the current time period. If the comprehensive rationality of the current time period meets the preset conditions, the intensity of the input airflow is not adjusted. The preset conditions in this embodiment are: the comprehensive rationality of the current time period is less than or equal to 0; that is, when the comprehensive rationality of the current time period is less than or equal to 0, the intensity of the input airflow is not adjusted. If the overall distribution of the rationality corresponding to all moments in the current time period does not meet the preset conditions, that is, the comprehensive rationality of the current time period is greater than 0, then the blockage degree of the protective drill pipe 3 outside the current time period is obtained according to the comprehensive rationality of the current time period and the airflow circulation degree in the protective drill pipe 3 outside the current time period, and the comprehensive rationality and the airflow circulation degree in the protective drill pipe 3 outside the current time period are negatively correlated with the blockage degree in the protective drill pipe 3 outside the current time period.

[0067] Among them, the negative correlation relationship means that the dependent variable will decrease as the independent variable increases, and the dependent variable will increase as the independent variable decreases. It can be a subtraction relationship, a division relationship, etc., which is determined by practical applications.

[0068] In this embodiment, a specific calculation formula for the blockage degree in the protective drill pipe 3 outside the current time period is given. The blockage degree in the protective drill pipe 3 outside the current time period can be expressed as:

[0069]

[0070] Wherein, D represents the blockage degree in the protective drill pipe 3 outside the current time period, W represents the airflow degree in the protective drill pipe 3 outside the current time period, Indicates the comprehensive rationality of the current time period.

[0071] The greater the airflow circulation in the protective drill pipe 3 outside the current time period and the greater the comprehensive rationality of the current time period, it means that the gas flow inside the protective drill pipe 3 outside the current time period is smoother, that is, the blockage degree in the protective drill pipe 3 outside the current time period is smaller.

[0072] After obtaining the blockage degree in the outer protective drill pipe 3 in the current time period, the airflow regulating device is controlled to change the pressure and size of the airflow entering the outer protective drill pipe, thereby preliminarily resolving the blockage and obtaining real-time changes in the blockage degree.

[0073] If the degree of blockage in the protective drill pipe 3 outside the current time period is less than or equal to the preset first threshold, the intensity of the input airflow is not adjusted. If the degree of blockage in the protective drill pipe 3 outside the current time period is greater than the preset first threshold and less than or equal to the preset second threshold, the difference between the maximum value of the intensity of the allowed input airflow and the current intensity of the input airflow is calculated and recorded as the intensity difference; the product of the intensity difference and the degree of blockage in the protective drill pipe 3 outside the current time period is recorded as the first product; the minimum value of the sum of the first product and the current intensity of the input airflow and the maximum value of the intensity of the allowed input airflow is taken as the intensity of the input airflow at the next moment, and the airflow regulating device adjusts the intensity of the input airflow at the next moment; the preset first threshold is less than the preset second threshold. If the degree of blockage in the protective drill pipe 3 outside the current time period is greater than the preset second threshold, the sum of the intensity difference and the degree of blockage in the protective drill pipe 3 outside the current time period is recorded as the first sum, and the product of the first sum and the degree of blockage in the protective drill pipe 3 outside the current time period is recorded as the second product; the minimum value of the sum of the second product and the current input airflow intensity and the maximum value of the input airflow intensity allowed is used as the input airflow intensity at the next moment, and the airflow regulating device adjusts the input airflow intensity at the next moment. The specific calculation formula for the input airflow intensity at the next moment is:

[0074]

[0075] Among them, P represents the intensity of the input airflow at the next moment, Indicates the maximum value of the allowed input airflow intensity. represents the intensity of the current input airflow, D represents the degree of blockage in the protective drill pipe 3 outside the current time period, Indicates the comprehensive rationality of the current time period, min() indicates the minimum value function, Indicates the preset first threshold, Indicates the preset second threshold value, .

[0076] In this embodiment, setting The value is 0.3, set The value is 0.6. In specific applications, implementers can set it according to specific circumstances. Indicates the intensity difference. The larger the value, the greater the difference between the maximum value allowed for the input airflow intensity and the current input airflow intensity. represents the first product; represents the first sum value, Represents the second product.

[0077] The airflow regulating device is adjusted according to the intensity of the input airflow at the next moment. After determining the intensity of the input airflow at the next moment and making corresponding adjustments, in order to ensure that the equipment returns to normal working state, the blockage degree in the inner and outer protective drill pipes 3 in the next time period will be judged.

[0078] Specifically, after the intensity of the input airflow is adjusted, a period of time is allowed to pass through the previously blocked gas. In this embodiment, the interval is 2 minutes. In specific applications, the implementer can set it according to specific circumstances. Then, the data acquisition module collects different types of parameter data in the external protection drill pipe 3 at each moment in the next time period. According to the different types of parameter data in the external protection drill pipe 3 at each moment in the next time period, the blockage degree in the external protection drill pipe 3 in the next time period is calculated. It should be noted that the calculation method of the blockage degree in the external protection drill pipe 3 in the next time period is similar to the calculation method of the blockage degree in the external protection drill pipe 3 in the current time period, except that the different types of parameter data in the external protection drill pipe 3 at each moment in the next time period are used to replace the different types of parameter data in the external protection drill pipe 3 at each moment in the current time period, so it will not be described in detail.

[0079] The difference between the blockage degree inside the protective drill pipe outside the next time period and the blockage degree inside the protective drill pipe 3 outside the current time period is recorded as the blockage degree change value; the ratio between the blockage degree change value and the time interval is taken as the rate of change of the blockage degree; the time interval is the time difference between the middle moment of the current time period and the middle moment of the next time period.

[0080] When the blockage degree change value is less than the preset change threshold and the blockage degree in the drill pipe in the next time period is greater than the preset first threshold, it is considered that the current unidirectional airflow has a poor effect on clearing the blockage of the external drill pipe 3, and the airflow mode of the device is adjusted to bidirectional airflow clearing. The preset first threshold is 0.3. When the real-time blockage degree of the external drill pipe 3 is less than the preset first threshold, the initial airflow intensity is restored.

[0081] The airflow mode of the protective drill pipe 3 outside the equipment is adjusted to bidirectional airflow clearing, and the specific operation steps are as follows:

[0082] First, restore the airflow intensity inside the protective drill pipe 3 outside the equipment to the initial airflow intensity; then, open another airflow channel of the gas diverter, and control the airflow intensity entering the two channels to be consistent; calculate the blockage degree inside the protective drill pipe 3 outside the equipment in the next time period, judge the airflow clearing effect inside the protective drill pipe 3 outside the equipment, and perform real-time analysis based on the above-mentioned airflow state recovery judgment threshold. It should be noted that when the normal airflow intensity is restored here, the bidirectional airflow mode is changed back to the unidirectional airflow mode.

[0083] At this point, the real-time clearing of the collection device for coal sample detection in the mine has been completed. Figure 6 As shown in the figure, this figure is a data processing flow chart corresponding to a collection device for coal sample detection in a mine. The data during the operation of the equipment is continuously collected, and the blockage that may occur in the external protection drill pipe 3 is alleviated according to the above steps until the collection of the required coal sample is completed. The equipment after the collection is completed is taken out from the sampling point, the coal sample therein is taken out, and it is analyzed using the existing coal sample detection means, and finally the subsequent mining collection work is carried out according to the analysis results of the coal sample detection.

[0084] The mining coal sample detection collection device provided in this embodiment adds a two-way airflow module on the basis of the existing device, and releases high-pressure gas in the opposite direction of the normal airflow into the outer protective drill pipe 3, thereby breaking up the coal ash blocked therein and blowing it out of the device by the normal airflow, thereby ensuring the cooling ability of the blade 2 during operation and improving the anti-blocking ability of the device. The data acquisition module of the mining coal sample detection collection device provided in this embodiment is used to collect different types of parameter data in the outer protective drill pipe 3, and the airflow adjustment device is used to analyze the overall distribution of the reasonable degree corresponding to all moments in the current time period. When an unreasonable situation occurs, the blockage degree in the outer protective drill pipe 3 is judged according to the overall distribution of the reasonable degree corresponding to all moments in the current time period and the airflow flow degree in the outer protective drill pipe 3 in the current time period. Further, based on the blockage degree in the protective drill pipe, the intensity of the input airflow at the next moment is determined and adjusted accordingly, so as to realize the real-time unblocking of the mining coal sample detection collection device, and by applying airflows of different intensities according to different blockage situations, energy consumption is reduced and equipment loss is reduced.

[0085] It should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A collection device for coal sample detection in mines, characterized in that: The collection device for coal sample detection in mines includes a data collection module and a bidirectional airflow module, wherein the bidirectional airflow module includes an airflow regulating device; The data acquisition module is used to obtain different types of parameter data in the external protection drill pipe at each moment in the current time period, wherein the parameter data includes pressure and flow rate, and the current time period is the time period during the coal sampling process in the mine; The airflow regulating device is used to obtain the degree of airflow circulation in the protective drill pipe outside the current time period by combining the overall distribution of the discrete degree of pressure and the discrete degree of flow rate in the current time period, and the consistency of the discrete degrees of different types of parameter data; if the overall distribution of the reasonable degree corresponding to all moments in the current time period does not meet the preset conditions, then the degree of blockage in the protective drill pipe outside the current time period is determined according to the overall distribution of the reasonable degree corresponding to all moments in the current time period and the degree of airflow circulation in the protective drill pipe outside the current time period; the reasonable degree is determined according to the parameter data and the corresponding standard tolerance range; based on the blockage degree in the protective drill pipe outside the current time period, the intensity of the input airflow at the next moment is determined and adjusted accordingly; The method combines the overall distribution of the discrete degree of pressure and the discrete degree of flow velocity in the current time period, and the consistency of the discrete degrees of different types of parameter data, to obtain the degree of airflow in the protective drill pipe outside the current time period, including: The sum of the discrete degrees of pressure at all times in the current time period and the discrete degrees of flow rate at all times in the current time period is recorded as the first characteristic value of the current time period; the maximum discrete degree and the average discrete degree of all types of parameter data at all times in the current time period are obtained; According to the difference between the maximum value of the discrete degree and the average value of the discrete degree, and the first characteristic value of the current time period, the degree of airflow in the protective drill pipe outside the current time period is obtained; the difference between the maximum value of the discrete degree and the average value of the discrete degree and the first characteristic value of the current time period are both negatively correlated with the degree of airflow; The reasonableness of each moment in the current time period is obtained, including: For any parameter data, the difference between the upper limit of the standard tolerance range corresponding to the parameter data and the parameter data at the candidate moment is recorded as the first difference, and the difference between the lower limit of the standard tolerance range corresponding to the parameter data and the parameter data at the candidate moment is recorded as the second difference; the normalized result of the product of the first difference and the second difference is used as the reasonable evaluation value of the parameter data at the candidate moment; The average of the reasonable evaluation values ​​of all types of parameter data at the candidate time is taken as the reasonable degree corresponding to the candidate time; The candidate time is any time in the current time period; If the overall distribution of the reasonableness corresponding to all moments in the current time period does not meet the preset condition, the blockage degree in the protective drill pipe outside the current time period is determined according to the overall distribution of the reasonableness corresponding to all moments in the current time period and the airflow degree in the protective drill pipe outside the current time period, including: The maximum value of the rationality corresponding to all moments in the current time period is taken as the comprehensive rationality of the current time period; If the comprehensive rationality of the current time period is greater than 0, the blockage degree in the protective drill pipe outside the current time period is obtained according to the comprehensive rationality and the airflow degree in the protective drill pipe outside the current time period, and both the comprehensive rationality and the airflow degree in the protective drill pipe outside the current time period are negatively correlated with the blockage degree in the protective drill pipe outside the current time period; The method of determining the intensity of the input airflow at the next moment based on the blockage degree in the protective drill pipe outside the current time period and making corresponding adjustments includes: If the blockage degree in the protective drill pipe outside the current time period is less than or equal to the preset first threshold, the intensity of the input airflow is not adjusted; If the blockage degree in the protective drill pipe outside the current time period is greater than a preset first threshold value and less than or equal to a preset second threshold value, the difference between the maximum value of the intensity of the allowed input airflow and the intensity of the current input airflow is calculated and recorded as the intensity difference; the product of the intensity difference and the blockage degree in the protective drill pipe outside the current time period is recorded as the first product; the minimum value of the sum of the first product and the intensity of the current input airflow and the maximum value of the intensity of the allowed input airflow is taken as the intensity of the input airflow at the next moment, and the airflow regulating device adjusts the intensity of the input airflow at the next moment; the preset first threshold value is less than the preset second threshold value; If the degree of blockage in the protective drill pipe outside the current time period is greater than the preset second threshold, the intensity of the input airflow at the next moment is determined based on the intensity difference, the degree of blockage in the protective drill pipe outside the current time period and the comprehensive rationality of the current time period, and the airflow regulating device adjusts the intensity of the input airflow at the next moment.

2. A collection device for coal sample detection in a mine according to claim 1, characterized in that: The bidirectional airflow module also includes a bidirectional airflow channel, a gas splitter and a filter.

3. A collection device for coal sample detection in mines according to claim 2, characterized in that: The collection device for coal sample detection in mines also includes a wind source providing module.

4. A collection device for coal sample detection in mines according to claim 2, characterized in that: After determining the intensity of the input airflow at the next moment and making corresponding adjustments, it also includes: Collect different types of parameter data in the external protection drill pipe at each moment in the next time period; Calculate the blockage degree in the external protection drill pipe in the next time period according to different types of parameter data in the external protection drill pipe at each moment in the next time period; The difference between the blockage degree in the protection drill pipe outside the next time period and the blockage degree in the protection drill pipe outside the current time period is recorded as the blockage degree change value; the ratio between the blockage degree change value and the time interval is taken as the change rate of the blockage degree; the time interval is the time difference between the middle moment of the current time period and the middle moment of the next time period; When the blockage degree change value is less than the preset change threshold and the blockage degree in the drill pipe in the next time period is greater than the preset first threshold, the airflow mode of the equipment is adjusted to two-way airflow clearing.

5. A collection device for coal sample detection in mines according to claim 1, characterized in that: If the comprehensive rationality of the current time period is less than or equal to 0, the intensity of the input airflow is not adjusted.

6. A collection device for coal sample detection in mines according to claim 1, characterized in that: The step of determining the intensity of the input airflow at the next moment according to the intensity difference, the blockage degree of the protective drill pipe outside the current time period and the comprehensive rationality of the current time period includes: The sum of the intensity difference and the blockage degree in the protective drill pipe outside the current time period is recorded as the first sum, and the product of the first sum and the blockage degree in the protective drill pipe outside the current time period is recorded as the second product; the minimum value of the sum of the second product and the current input airflow intensity and the maximum value of the allowed input airflow intensity is taken as the input airflow intensity at the next moment.

Images