CN118730622B - A collection device for coal sample detection in mines - Google Patents
A collection device for coal sample detection in mines Download PDFInfo
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- CN118730622B CN118730622B CN202411217079.3A CN202411217079A CN118730622B CN 118730622 B CN118730622 B CN 118730622B CN 202411217079 A CN202411217079 A CN 202411217079A CN 118730622 B CN118730622 B CN 118730622B
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- 239000003245 coal Substances 0.000 title claims abstract description 58
- 238000001514 detection method Methods 0.000 title claims abstract description 26
- 230000000903 blocking effect Effects 0.000 claims abstract description 87
- 238000000034 method Methods 0.000 claims abstract description 22
- 238000005070 sampling Methods 0.000 claims abstract description 21
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 20
- 230000008569 process Effects 0.000 claims abstract description 11
- 238000009826 distribution Methods 0.000 claims description 20
- 230000008859 change Effects 0.000 claims description 15
- 238000005065 mining Methods 0.000 claims description 9
- 238000011156 evaluation Methods 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 2
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- 238000010586 diagram Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 8
- 238000009423 ventilation Methods 0.000 description 8
- 230000001681 protective effect Effects 0.000 description 5
- 238000004364 calculation method Methods 0.000 description 4
- 239000010883 coal ash Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 230000001419 dependent effect Effects 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 3
- 239000002817 coal dust Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
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- 238000005272 metallurgy Methods 0.000 description 1
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- 230000004048 modification Effects 0.000 description 1
- 238000010606 normalization Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/04—Devices for withdrawing samples in the solid state, e.g. by cutting
- G01N1/08—Devices for withdrawing samples in the solid state, e.g. by cutting involving an extracting tool, e.g. core bit
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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Abstract
The invention relates to the technical field of mine coal sample detection, in particular to a collection device for mine coal sample detection. The device comprises a data acquisition module and a bidirectional airflow module, wherein the bidirectional airflow module comprises an airflow adjusting device, the data acquisition module is used for acquiring different kinds of parameter data in the outer protection drill pipe at each moment in a current time period, the current time period is a time period in a mine coal sample sampling process, the airflow adjusting device is used for carrying out data processing on the acquired parameter data to determine the blocking degree in the outer protection drill pipe in the current time period, and the strength of the input airflow at the next moment is determined and adjusted correspondingly based on the blocking degree in the outer protection drill pipe in the current time period. The invention realizes real-time blockage removal of the acquisition device for detecting the mine coal samples.
Description
Technical Field
The invention relates to the technical field of mine coal sample detection, in particular to a collection device for mine coal sample detection.
Background
The coal mine is used as an important energy source and industrial raw material, the quality and the property of the coal mine directly influence the use effect and the stability of the production process, the quality of the coal can be ensured to meet the requirements of other industrial purposes such as combustion, power generation, metallurgy and the like by detecting the coal sample, the combustion or processing process can be optimized, the energy consumption and the emission are reduced, the control cost is facilitated, and the service life of equipment is prolonged.
In order to obtain a more accurate coal sample detection result, the method is particularly important for collecting a mine coal sample detection sample, and the efficient and stable sampling capability can greatly improve the effect of coal sample detection, so that the operation can be performed more specifically, for example, the mining tool can be properly selected and used, and the sampling frequency can be reasonably arranged. The prior invention patent provides a novel coal sample collecting device (publication number is CN 102706690B), the device is divided into two working states, namely a feeding state and a sampling state, and the air flow direction changing mechanism is controlled to further control the air flow in an outer protection drill pipe and a sampling drill pipe, so that the blade is cold and the sampling pipe is clean, and the device has the advantages of simple structure, simplicity and convenience in operation and good coal sample collecting effect. But the device still has room for further elevation during sampling.
When the device enters a sampling state, the air flow in the outer protection drill pipe is still continuously output for cooling the cutter. However, when the sampling rate of the device is too high, the contact frequency of the blade and the coal seam is increased, more coal dust can be generated, if the removal capacity of the air flow is not correspondingly improved along with the increase of the sampling rate, the coal dust can be accumulated in the outer protection drill pipe, so that blockage is caused, the cooling effect of the cutter is reduced, the sampling efficiency of the device is reduced, and even the cutter is damaged.
Disclosure of Invention
In order to solve the problem of blockage of the existing acquisition device for detecting the mine coal sample in the sampling process, the invention aims to provide the acquisition device for detecting the mine coal sample, which adopts the following technical scheme:
The invention provides a mine coal sample detection acquisition device, which comprises a data acquisition module and a bidirectional airflow module, wherein the bidirectional airflow module comprises an airflow adjusting device;
The data acquisition module is used for acquiring different kinds of parameter data in the protection drill pipe at each moment in the current time period, wherein the parameter data comprise pressure and flow rate, and the current time period is a time period in the sampling process of the mine coal sample;
The airflow adjusting device is used for combining the integral distribution of the discrete degree of the pressure and the discrete degree of the flow velocity in the current time period and the consistent degree of the discrete degree of different types of parameter data to obtain the airflow circulation degree in the outer protection drill pipe of the current time period, if the integral distribution of the reasonable degree corresponding to all moments in the current time period does not meet the preset condition, the blocking degree in the outer protection drill pipe of the current time period is determined according to the integral distribution of the reasonable degree corresponding to all moments in the current time period and the airflow circulation degree in the outer protection drill pipe of the current time period, the reasonable degree is determined according to the parameter data and the corresponding standard bearing range, and the strength of the input airflow at the next moment is determined based on the blocking degree in the outer protection drill pipe of the current time period and is correspondingly adjusted.
Preferably, the bidirectional airflow module further comprises a bidirectional airflow channel, a gas splitter and a filter screen.
Preferably, the acquisition device for detecting the mine coal sample further comprises a wind source providing module.
Preferably, after determining the intensity of the input airflow at the next moment and making corresponding adjustments, the method further comprises:
collecting different kinds of parameter data in the protection drill pipe outside each moment in the next time period;
Calculating the blocking degree of the outer protection drill pipe in the next time period according to different kinds of parameter data in the outer protection drill pipe at each moment in the next time period;
the method comprises the steps of recording the difference between the blocking degree in the outer protection drill pipe of the next time period and the blocking degree in the outer protection drill pipe of the current time period as a blocking degree change value, taking the ratio of the blocking degree change value to a time interval as the change rate of the blocking degree, wherein the time interval is the time difference between the middle time of the current time period and the middle time of the next time period;
When the blocking degree change value is smaller than a preset change threshold value and the blocking degree in the drill pipe in the next time period is larger than a preset first threshold value, the airflow mode of the adjusting device is bidirectional airflow blocking cleaning.
Preferably, the step of obtaining the airflow circulation degree in the protection drill pipe outside the current time period by combining the overall distribution of the discrete degree of the pressure and the discrete degree of the flow rate in the current time period and the consistent degree of the discrete degree of the different kinds of parameter data includes:
the sum of the discrete degree of the pressure at all times in the current time period and the discrete degree of the flow velocity at all times in the current time period is recorded as a first characteristic value of the current time period;
And obtaining the airflow circulation degree in the protection drill pipe outside the current time period 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, wherein 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 in negative correlation with the airflow circulation degree.
Preferably, the obtaining of the reasonable degree corresponding to each moment in the current time period includes:
for any parameter data, the difference value between the upper limit value of the standard bearing range corresponding to the parameter data and the parameter data at the candidate moment is marked as a first difference value, and the difference value between the lower limit value of the standard bearing range corresponding to the parameter data and the parameter data at the candidate moment is marked as a second difference value;
Taking the average value of the reasonable evaluation values of all kinds of parameter data at the candidate moment as the reasonable degree corresponding to the candidate moment;
The candidate time is any time in the current time period.
Preferably, if the overall distribution of the reasonable degree corresponding to all the moments in the current time period does not meet the preset condition, determining the blocking degree in the protection drill pipe outside the current time period according to the overall distribution of the reasonable degree corresponding to all the moments in the current time period and the airflow circulation degree in the protection drill pipe outside the current time period, including:
taking the maximum value of the reasonable degree corresponding to all the moments in the current time period as the comprehensive reasonable degree of the current time period;
if the comprehensive rationality of the current time period is greater than 0, obtaining the blocking degree of the current time period outer protection drill pipe according to the comprehensive rationality and the air flow degree of the current time period outer protection drill pipe, wherein the comprehensive rationality and the air flow degree of the current time period outer protection drill pipe are in negative correlation with the blocking degree of the current time period outer protection drill pipe.
Preferably, if the integrated rationality of the current time period is less than or equal to 0, the intensity of the input airflow is not adjusted.
Preferably, the determining the intensity of the input airflow at the next moment based on the blocking degree in the protection drill pipe outside the current time period and adjusting accordingly includes:
If the blocking degree in the protection drill pipe outside the current time period is smaller than or equal to a preset first threshold value, the intensity of the input air flow is not adjusted;
If the blocking degree in the protection drill pipe outside the current time period is larger than a preset first threshold value and smaller than or equal to a preset second threshold value, calculating the difference between the maximum value of the intensity of the allowable input air flow and the intensity of the current input air flow, and recording the difference as the intensity difference; the product of the intensity difference and the blocking degree in the protection drill pipe outside the current time period is recorded as a first product, the minimum value of the sum value of the first product and the intensity of the current input air flow and the maximum value of the intensity of the allowable input air flow is used as the intensity of the input air flow at the next time, and the air flow regulating device regulates the intensity of the input air flow at the next time;
if the blocking degree in the protection drill pipe outside the current time period is larger than a preset second threshold value, determining the intensity of the input air flow at the next time according to the intensity difference, the blocking degree in the protection drill pipe outside the current time period and the comprehensive rationality of the current time period, and adjusting the intensity of the input air flow at the next time by the air flow adjusting device.
Preferably, the determining the strength of the input airflow at the next moment according to the strength difference, the blocking degree in the protection drill pipe outside the current time period and the comprehensive rationality of the current time period includes:
And the minimum value of the sum value of the second product and the current input air flow and the maximum value of the intensity of the allowable input air flow is taken as the intensity of the input air flow at the next moment.
The invention has at least the following beneficial effects:
According to the acquisition device for detecting the mine coal samples, the bidirectional airflow module is added on the basis of the existing device, and the high-pressure gas with the flow direction opposite to that of the normal airflow is released from the external protection drill pipe, so that the blocked coal ash is scattered and blown out of the equipment by the normal airflow, the cooling capacity of the blade in the working process is ensured, and the anti-blocking capacity of the equipment is improved. The data acquisition module of the acquisition device for detecting the mine coal sample is used for acquiring different kinds of parameter data in the outer protection drill pipe, the airflow adjusting device is used for analyzing the overall distribution condition of reasonable degree corresponding to all moments in the current time period, when an unreasonable condition occurs, the blocking degree in the outer protection 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 outer protection drill pipe in the current time period, further, the strength of the input airflow at the next moment is determined based on the blocking degree in the protection drill pipe and is correspondingly adjusted, real-time blocking clearing of the acquisition device for detecting the mine coal sample is realized, and the energy consumption is reduced and the equipment loss is reduced by applying airflows of different strengths according to different blocking conditions.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions and advantages of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are only some embodiments of the invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of the overall mechanical structure of a mining coal sample detection acquisition device according to an embodiment of the present invention;
fig. 2 is a first axial schematic diagram of a ventilation mandrel of an acquisition device for mine coal sample detection according to an embodiment of the present invention;
fig. 3 is a schematic second axial side view of a ventilation mandrel of the acquisition device for mine coal sample detection provided by the embodiment of the invention;
fig. 4 is a schematic structural diagram of a sliding sleeve of an acquisition device for mine coal sample detection according to an embodiment of the present invention;
Fig. 5 is a schematic side view of a third shaft of a ventilation mandrel of an acquisition device for mine coal sample detection according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a data processing flow corresponding to an acquisition device for detecting a mine coal sample according to an embodiment of the present invention;
The device comprises a sampling drill bit 1, a blade 2, an outer protection drill pipe 3, a pressure regulating nut 6, an airflow reversing pressure spring 7, a ventilation mandrel 8, a guide hole 81, an outgoing air hole 82, a reversing air outlet hole 83, a reversing air inlet hole 84, a stepped hole 85, a front cavity 86, a rear cavity 87, a first airflow valve 88, a second airflow valve 89, a sliding sleeve 9, a ventilation groove 91, a pipeline 92, an external thread sleeve 10, a drill rod connecting sleeve 11, a blocking pin groove 112, a blocking pin 13, a blocking pin return spring 14 and directions c and A.
Detailed Description
In order to further explain the technical means and effects adopted by the invention to achieve the preset aim, the following describes a mine coal sample detection acquisition device according to the invention in detail with reference to the attached drawings and the preferred embodiment.
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.
The invention provides a specific scheme of a mining coal sample detection acquisition device, which is specifically described below with reference to the accompanying drawings.
An embodiment of a collection device for detecting a mine coal sample:
referring to fig. 1, which shows an embodiment of the invention, fig. 1 is a schematic overall mechanical structure of a mine coal sample detection collection device, fig. 2, fig. 3 and fig. 5 are a first axial schematic diagram, a second axial schematic diagram and a third axial schematic diagram of a ventilation mandrel 8 of the mine coal sample detection collection device, fig. 4 is a schematic structure of a sliding sleeve 9 of the mine coal sample detection collection device, wherein 1 is a sampling drill bit, 2 is a blade, 3 is an external protection drill pipe, 6 is a pressure regulating nut, 7 is an airflow reversing pressure spring, 8 is a ventilation mandrel, 81 is a guide hole, 82 is an outgoing air hole, 83 is a reversing air hole, 84 is a reversing air 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 sliding sleeve, 91 is a ventilation groove, 92 is a pipeline, 10 is an external thread sleeve, 11 is a drill rod, 112 is a pin groove, 13 is a blocking pin, 14 is a blocking pin, and c is a reset spring. The acquisition device for detecting the mine coal samples is an improvement on the basis of the existing coal sample acquisition device (with the publication number of CN 102706690B), and specifically comprises a data acquisition module, a bidirectional airflow module and a wind source providing module, wherein the bidirectional airflow module comprises an airflow adjusting device, a bidirectional airflow channel, an airflow splitter and a filter screen, and the airflow adjusting device is arranged at an inlet of a rear cavity of equipment and used for adjusting the flow rate of air entering the equipment. The two-way airflow channel is used for properly widening the radius of the equipment and changing the existing air channel of the outer protection drill pipe 3 into the two-way airflow channel. The gas splitter is arranged at the inlet of a gas channel of the protective drill pipe 3 inside and outside the rear cavity and divides the gas flow entering the equipment into two directions. The filter screen is arranged on the gas diverter and used for blocking coal ash or external dust and the like and preventing the coal ash or external dust from entering the equipment. The data acquisition module comprises different kinds of sensors, and in the embodiment, the data acquisition module comprises a temperature sensor, a pressure sensor and a flow rate sensor, wherein the temperature sensor is arranged at the tail end of the blade 2 of the equipment and is used for detecting the temperature in the working process of the blade 2. Pressure sensors (mounted in parallel in a plurality of positions) are mounted on the inner surface of the outer protection drill pipe 3 for detecting the gas pressure levels at different positions inside the outer protection drill pipe 3. The flow rate sensor (a plurality of positions are arranged in parallel) is arranged on the inner surface of the outer protection drill pipe 3 and is used for detecting the gas flow rates at different positions inside the outer protection drill pipe 3. The wind source providing module comprises a high-pressure fan, and the high-pressure fan is used as a gas source, so that sufficient pressure and gas flow can be provided.
The data acquisition module is used for acquiring different kinds of parameter data in the protection drill pipe 3 at each moment in the current time period, wherein the parameter data comprise pressure and flow rate, and the current time period is a time period in the sampling process of the mine coal sample.
The invention aims to acquire the blocking condition of the equipment in the outer protection drill rod in the sampling process in real time by analyzing the data fed back by the sensor, and timely adjust the blocking clearing mode of the air flow, thereby improving the blocking clearing efficiency of the equipment, improving the sampling efficiency and reducing the damage possibility of the equipment.
When the device enters a sampling state, the sensor is started, the data acquisition module acquires different kinds of parameter data in the outer protection drill pipe 3 in real time, the parameter data acquired by the embodiment comprise pressure, flow speed and temperature, and in specific application, an implementer can select and acquire according to specific conditions. In this embodiment, parameter data is set to be collected once every second, that is, one pressure data, one flow rate data and one temperature data are collected every second, and in a specific application, the practitioner can set the collection frequency of the parameter data according to the lifting condition.
So far, different kinds of parameter data in the protection drill pipe 3 outside each moment in the current time period are obtained, the current time period is a set formed by all historical moments with the time interval smaller than or equal to the preset time length with the current moment, the preset time length is 5 minutes in the embodiment, and in the specific application, an implementer can set according to specific conditions.
The airflow adjusting device is used for combining the integral distribution of the discrete degree of the pressure and the discrete degree of the flow velocity in the current time period and the consistent degree of the discrete degree of different types of parameter data to obtain the airflow circulation degree in the outer protection drill pipe 3 in the current time period, if the integral distribution of the reasonable degree corresponding to all moments in the current time period does not meet the preset condition, determining the blocking degree in the outer protection drill pipe 3 in the current time period according to the integral distribution of the reasonable degree corresponding to all moments in the current time period and the airflow circulation degree in the outer protection drill pipe 3 in the current time period, wherein the reasonable degree is determined according to the parameter data and the corresponding standard bearing range, determining the strength of the input airflow at the next moment based on the blocking degree in the outer protection drill pipe 3 in the current time period, and correspondingly adjusting.
Firstly, the discrete degree of each parameter data at all times in the current time period is obtained according to each parameter data at each time in the current time period, and the discrete degree can be represented by indexes such as variance, standard deviation, extremely poor data and the like. In this embodiment, the degree of dispersion is represented by using the variance, specifically, for any one kind of parameter data, the variance of such parameter data at each time in the current time period is calculated as the degree of dispersion of such parameter data at all times in the current time period.
And obtaining the maximum value of the discrete degree and the average value of the discrete degree of all the parameter data at all the time in the current time period. And obtaining the airflow circulation degree in the protection drill pipe 3 outside the current time period 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, wherein 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 in negative correlation with the airflow circulation degree.
The negative correlation represents that the dependent variable decreases with increasing independent variable, and the dependent variable increases with decreasing independent variable, and may be a subtraction relationship, a division relationship, or the like, which is determined by practical application.
In this embodiment, given a specific calculation formula of the airflow circulation degree, the airflow circulation degree in the protection drill pipe 3 outside the current period may be expressed as:
wherein W represents the air flow circulation degree in the protection drill pipe 3 outside the current time period, Representing the degree of dispersion of the pressure at all times during the current time period,Indicating the degree of dispersion of the flow rate at all times during the current time period,Represents the maximum value of the degree of dispersion of all kinds of parameter data at all times in the current period,An average value representing the degree of dispersion of all kinds of parameter data at all times in the current period,Indicating that the first adjustment parameter is preset,Representing taking absolute value symbols.
In this embodiment, the preset first adjustment parameter is introduced into the calculation formula of the airflow circulation degree to prevent the denominator from being 0, and in this embodiment, the preset first adjustment parameter is 0.01, and in a specific application, an implementer can set according to specific situations.The first characteristic value representing the current time period is smaller, which means that the whole of the dispersion degree of the pressure and the dispersion degree of the flow rate in the current time period is not dispersed.For reflecting the difference between the maximum value of the degree of dispersion and the average value of the degree of dispersion of all kinds of parameter data at all times in the current period. When the first characteristic value of the current time period is smaller and the difference between the maximum value of the discrete degree and the average value of the discrete degree of all kinds of parameter data at all times in the current time period is smaller, the higher the consistency degree of all kinds of parameter data in the current time period is, namely, the more uniform the airflow velocity of all positions in the outer protection drill pipe 3 is, and the higher the gas circulation degree is.
Next, this embodiment will be described by taking any time in the current time period as an example, and the method provided in this embodiment may be used for processing other time.
Specifically, any time within the current time period is noted as a candidate time. For any parameter data, the standard bearing range corresponding to the parameter data isThe upper limit value of the standard bearing range corresponding to the parameter dataThe difference between the parameter data and the candidate moment is recorded as a first difference, and the lower limit value of the standard bearing range corresponding to the parameter dataAnd taking the normalized result of the product between the first difference value and the second difference value as a reasonable evaluation value of the parameter data at the candidate moment. By adopting the method, the reasonable evaluation value of each kind of parameter data at the candidate moment can be obtained, namely, each kind of parameter data at the moment corresponds to one reasonable evaluation value. And taking the average value of the reasonable evaluation values of all kinds of parameter data at the candidate moment as the reasonable degree corresponding to the candidate moment. It should be noted that each parameter data has its corresponding standard bearing range, and the standard bearing range is set manually.
The reasonable degree corresponding to the ith moment in the current time period can be expressed as:
Wherein, Represents the reasonable degree corresponding to the ith moment in the current time period, K represents the category number of the parameter data,An upper limit value of a standard tolerance range corresponding to the parameter data of the kth category,A lower limit value of a standard tolerance range corresponding to the parameter data of the kth category,Parameter data of the kth category indicating the ith time in the current period, norm () indicates a normalization function.
A first difference value is indicated and a second difference value is indicated,Representing a second difference when the parameter is within the standard bearing rangeConversely, when the parameter is out of the standard bearing range。
By adopting the method, the reasonable degree corresponding to each moment in the current time period can be obtained, and the maximum value of the reasonable degree corresponding to all moments in the current time period is taken as the comprehensive reasonable degree of the current time period. If the comprehensive rationality of the current time period meets the preset condition, the intensity of the input air flow is not adjusted, and the preset condition in the embodiment is that the comprehensive rationality of the current time period is smaller than or equal to 0, namely, when the comprehensive rationality of the current time period is smaller than or equal to 0, the intensity of the input air flow is not adjusted. If the overall distribution of the reasonable degree corresponding to all the moments in the current time period does not meet the preset condition, namely the comprehensive reasonable degree of the current time period is larger than 0, the blocking degree of the outer protection drill pipe 3 in the current time period is obtained according to the comprehensive reasonable degree of the current time period and the air flow degree of the outer protection drill pipe 3 in the current time period, and the comprehensive reasonable degree and the air flow degree of the outer protection drill pipe 3 in the current time period are in negative correlation with the blocking degree of the outer protection drill pipe 3 in the current time period.
The negative correlation represents that the dependent variable decreases with increasing independent variable, and the dependent variable increases with decreasing independent variable, and may be a subtraction relationship, a division relationship, or the like, which is determined by practical application.
In the present embodiment, given a specific calculation formula of the clogging degree in the outer protection drill pipe 3 in the present time zone, the clogging degree in the outer protection drill pipe 3 in the present time zone may be expressed as:
Wherein D represents the degree of clogging in the outer protective drill pipe 3 in the present time zone, W represents the degree of airflow through the outer protective drill pipe 3 in the present time zone, Indicating the overall rationality of the current time period.
When the airflow circulation degree in the outer protection drill pipe 3 of the current time period is larger and the comprehensive rationality of the current time period is also larger, the gas flow in the outer protection drill pipe 3 of the current time period is smoother, namely the blocking degree in the outer protection drill pipe 3 of the current time period is smaller.
After the blockage degree in the outer protection drill pipe 3 in the current time period is obtained, the pressure and the size of the air flow entering the outer protection drill pipe are changed by controlling the air flow adjusting device, the blockage situation is preliminarily resolved, and the real-time blockage degree change is obtained.
If the blocking degree in the protection drill pipe 3 outside the current time period is smaller than or equal to a preset first threshold value, the intensity of the input air flow is not adjusted. If the blocking degree in the outer protection drill pipe 3 of the current time period is larger than a preset first threshold value and smaller than or equal to a preset second threshold value, calculating the difference between the maximum value of the intensity of the allowed input air flow and the intensity of the current input air flow, recording the difference as the intensity difference, recording the product of the intensity difference and the blocking degree in the outer protection drill pipe 3 of the current time period as a first product, taking the minimum value of the sum value of the first product and the intensity of the current input air flow and the maximum value of the intensity of the allowed input air flow as the intensity of the input air flow at the next moment, and adjusting the intensity of the input air flow at the next moment by an air flow adjusting device, wherein the preset first threshold value is smaller than the preset second threshold value. If the blocking degree in the outer protection drill pipe 3 in the current time period is larger than a preset second threshold value, the sum of the intensity difference and the blocking degree in the outer protection drill pipe 3 in the current time period is recorded as a first sum value, the product of the first sum value and the blocking degree in the outer protection drill pipe 3 in the current time period is recorded as a second product, the minimum value of the sum value of the second product and the intensity of the current input air flow and the maximum value of the intensity of the allowable input air flow is used as the intensity of the input air flow at the next moment, and the air flow regulating device regulates the intensity of the input air flow at the next moment. The specific calculation formula of the intensity of the input airflow at the next moment is as follows:
Wherein P represents the intensity of the input airflow at the next moment, Representing the maximum value of the intensity allowed to enter the air flow,Indicating the intensity of the current input air flow, D indicating the degree of blockage in the protection drill pipe 3 outside the current time period,Representing the overall rationality of the current time period, min () represents taking the minimum function,Indicating that a preset first threshold value is to be provided,Indicating that a second threshold value is preset,。
In the present embodiment, there is providedHas a value of 0.3, is provided withThe value of (2) is 0.6, and in a specific application, the practitioner can set the value according to the specific situation.The larger the value, the larger the difference in intensity is expressed, which illustrates that the difference between the maximum value of the intensity of the allowable input air flow and the intensity of the current input air flow is larger.Representing a first product; a first sum value is represented and a second sum value is represented, Representing a second product.
The air flow adjusting device adjusts according to the intensity of the input air flow at the next moment, and after the intensity of the input air flow at the next moment is determined and adjusted correspondingly, in order to ensure that the equipment is restored to the normal working state, the blocking degree in the inner and outer protection drill pipes 3 in the next time period is judged.
Specifically, after the intensity of the input air flow is adjusted, a period of time is set to enable the air to circulate before blockage, the interval time length in the embodiment is 2 minutes, in particular application, an operator can set according to particular conditions, then a data acquisition module acquires different kinds of parameter data in the outer protection drill pipe 3 at each moment in the next time period, and the blockage degree in the outer protection drill pipe 3 in the next time period is calculated according to the different kinds of parameter data in the outer protection drill pipe 3 at each moment in the next time period. It should be noted that, the method for calculating the blocking degree of the outer protection drill pipe 3 in the next time period is similar to the method for calculating the blocking degree of the outer protection drill pipe 3 in the current time period, but the different kinds of parameter data in the outer protection drill pipe 3 at each moment in the current time period are replaced by the different kinds of parameter data in the outer protection drill pipe 3 at each moment in the next time period, so that redundant description is omitted.
The difference between the blocking degree in the outer protective drill pipe of the next time period and the blocking degree in the outer protective drill pipe 3 of the current time period is recorded as a blocking degree change value, the ratio between the blocking degree change value and the time interval is used as the changing rate of the blocking degree, and the time interval is the time difference between the middle time of the current time period and the middle time of the next time period.
When the blocking degree change value is smaller than a preset change threshold value and the blocking degree in the drill pipe is larger than a preset first threshold value in the next time period, the blocking removal effect of the current unidirectional airflow on the external protection drill pipe 3 is considered to be poor, and the airflow mode of the adjusting device is bidirectional airflow blocking removal. The first threshold is preset to be 0.3. When the real-time clogging degree of the outer protection drill pipe 3 is smaller than the preset first threshold value, the initial air flow intensity is restored.
The airflow mode of the protection drill pipe 3 outside the equipment is adjusted to be bidirectional airflow for clearing blockage, and the specific operation steps are as follows:
Firstly, restoring the air flow intensity inside the outer protection drill pipe 3 to the initial air flow intensity, then opening the other air flow channel of the air flow divider, controlling the air flow intensity entering the two channels to be consistent, calculating the blocking degree inside the outer protection drill pipe 3 in the next time period, judging the air flow blocking clearing effect inside the outer protection drill pipe 3, and analyzing the air flow blocking clearing effect in real time according to the air flow state restoring judgment threshold value. It should be noted that, while the normal air flow intensity is recovered here, the bidirectional air flow mode is changed back to the unidirectional air flow mode.
Thus, the real-time blockage removal of the acquisition device for detecting the mine coal sample is completed, and as shown in fig. 6, the diagram is a data processing flow chart corresponding to the acquisition device for detecting the mine coal sample. Continuously collecting data in the working process of the equipment, and relieving possible blocking conditions in the external protection drill pipe 3 according to the steps until the collection of the required mine coal sample is completed. And taking out the equipment after the collection from the sampling point, taking out the mine coal sample, analyzing the mine coal sample by using the existing mine coal sample detection means, and finally carrying out subsequent mining collection work according to the analysis result of the coal sample detection.
According to the acquisition device for detecting the mine coal samples, the bidirectional airflow module is added on the basis of the existing device, and high-pressure gas with the flow direction opposite to that of normal airflow is released from the external protection drill pipe 3, so that the blocked coal ash is scattered and blown out of the equipment by the normal airflow, the cooling capacity of the blade 2 in the working process is guaranteed, and the anti-blocking capacity of the equipment is improved. The data acquisition module of the acquisition device for detecting the mine coal sample is used for acquiring different kinds of parameter data in the outer protection drill pipe 3, the airflow adjusting device is used for analyzing the overall distribution condition of reasonable degree corresponding to all moments in the current time period, when unreasonable conditions occur, the blocking degree in the outer protection 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 circulation degree in the outer protection drill pipe 3 in the current time period, further, the strength of the input airflow at the next moment is determined based on the blocking degree in the protection drill pipe and corresponding adjustment is carried out, real-time blocking clearing of the acquisition device for detecting the mine coal sample is realized, and airflows of different strengths are applied according to different blocking conditions, so that energy consumption is reduced, and equipment loss is reduced.
It should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. within the principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The acquisition device for detecting the mine coal samples is characterized by comprising a data acquisition module and a bidirectional airflow module, wherein the bidirectional airflow module comprises an airflow adjusting device;
The data acquisition module is used for acquiring different kinds of parameter data in the protection drill pipe at each moment in the current time period, wherein the parameter data comprise pressure and flow rate, and the current time period is a time period in the sampling process of the mine coal sample;
The airflow regulating device is used for combining the integral distribution of the discrete degree of the pressure and the discrete degree of the flow velocity in the current time period and the consistent degree of the discrete degree of different kinds of parameter data to obtain the airflow circulation degree in the protection drill pipe outside the current time period; if the overall distribution of the reasonable degree corresponding to all the moments in the current time period does not meet the preset condition, determining the blocking degree in the outer protection drill pipe of the current time period according to the overall distribution of the reasonable degree corresponding to all the moments in the current time period and the air flow circulation degree in the outer protection drill pipe of the current time period, wherein the reasonable degree is determined according to the parameter data and the corresponding standard bearing range;
The method for obtaining the airflow circulation degree in the protection drill pipe outside the current time period by combining the integral distribution of the discrete degree of the pressure and the discrete degree of the flow speed in the current time period and the consistent degree of the discrete degree of different kinds of parameter data comprises the following steps:
the sum of the discrete degree of the pressure at all times in the current time period and the discrete degree of the flow velocity at all times in the current time period is recorded as a first characteristic value of the current time period;
Obtaining the air flow circulation degree in the protection drill pipe outside the current time period 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, wherein 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 in negative correlation with the air flow circulation degree;
the obtaining of the reasonable degree corresponding to each moment in the current time period comprises the following steps:
for any parameter data, the difference value between the upper limit value of the standard bearing range corresponding to the parameter data and the parameter data at the candidate moment is marked as a first difference value, and the difference value between the lower limit value of the standard bearing range corresponding to the parameter data and the parameter data at the candidate moment is marked as a second difference value;
Taking the average value of the reasonable evaluation values of all kinds of parameter data at the candidate moment as the reasonable degree corresponding to the candidate moment;
the candidate time is any time in the current time period;
If the overall distribution of the reasonable degree corresponding to all the moments in the current time period does not meet the preset condition, determining the blocking degree in the outer protection drill pipe of the current time period according to the overall distribution of the reasonable degree corresponding to all the moments in the current time period and the airflow circulation degree in the outer protection drill pipe of the current time period, including:
taking the maximum value of the reasonable degree corresponding to all the moments in the current time period as the comprehensive reasonable degree of the current time period;
If the comprehensive rationality of the current time period is greater than 0, obtaining the blocking degree of the outer protection drill pipe in the current time period according to the comprehensive rationality and the air flow degree of the outer protection drill pipe in the current time period, wherein the comprehensive rationality and the air flow degree of the outer protection drill pipe in the current time period are in negative correlation with the blocking degree of the outer protection drill pipe in the current time period;
The method for determining the strength of the input airflow at the next moment based on the blocking degree in the protection drill pipe outside the current time period and correspondingly adjusting the strength comprises the following steps:
If the blocking degree in the protection drill pipe outside the current time period is smaller than or equal to a preset first threshold value, the intensity of the input air flow is not adjusted;
If the blocking degree in the protection drill pipe outside the current time period is larger than a preset first threshold value and smaller than or equal to a preset second threshold value, calculating the difference between the maximum value of the intensity of the allowable input air flow and the intensity of the current input air flow, and recording the difference as the intensity difference; the product of the intensity difference and the blocking degree in the protection drill pipe outside the current time period is recorded as a first product, the minimum value of the sum value of the first product and the intensity of the current input air flow and the maximum value of the intensity of the allowable input air flow is used as the intensity of the input air flow at the next time, and the air flow regulating device regulates the intensity of the input air flow at the next time;
if the blocking degree in the protection drill pipe outside the current time period is larger than a preset second threshold value, determining the intensity of the input air flow at the next time according to the intensity difference, the blocking degree in the protection drill pipe outside the current time period and the comprehensive rationality of the current time period, and adjusting the intensity of the input air flow at the next time by the air flow adjusting device.
2. The mining coal sample detection collection device according to claim 1, wherein the bidirectional airflow module further comprises a bidirectional airflow channel, a gas splitter and a filter screen.
3. The mining coal sample detection collection device according to claim 2, further comprising a wind source providing module.
4. The mining coal sample detection collection device according to claim 2, further comprising, after determining the intensity of the input air flow at the next time and making a corresponding adjustment:
collecting different kinds of parameter data in the protection drill pipe outside each moment in the next time period;
Calculating the blocking degree of the outer protection drill pipe in the next time period according to different kinds of parameter data in the outer protection drill pipe at each moment in the next time period;
the method comprises the steps of recording the difference between the blocking degree in the outer protection drill pipe of the next time period and the blocking degree in the outer protection drill pipe of the current time period as a blocking degree change value, taking the ratio of the blocking degree change value to a time interval as the change rate of the blocking degree, wherein the time interval is the time difference between the middle time of the current time period and the middle time of the next time period;
When the blocking degree change value is smaller than a preset change threshold value and the blocking degree in the drill pipe in the next time period is larger than a preset first threshold value, the airflow mode of the adjusting device is bidirectional airflow blocking cleaning.
5. The mining coal sample detection collection device according to claim 1, wherein the intensity of the input air flow is not adjusted if the integrated rationality of the current time period is less than or equal to 0.
6. The mining coal sample detection collection device according to claim 1, wherein the determining the intensity of the input air flow at the next time according to the intensity difference, the blocking degree in the protection drill pipe outside the current time period and the comprehensive rationality of the current time period comprises:
And the minimum value of the sum value of the second product and the current input air flow and the maximum value of the intensity of the allowable input air flow is taken as the intensity of the input air flow at the next moment.
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| CN110424949B (en) * | 2019-06-24 | 2021-06-22 | 中国矿业大学 | Inversion calculation method for coal bed gas parameter rapid measurement while drilling |
| CN216517978U (en) * | 2021-12-16 | 2022-05-13 | 淮南矿业(集团)有限责任公司 | Double-tube sampling device for underground coal mine |
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| CN102706690A (en) * | 2012-05-25 | 2012-10-03 | 中平能化集团机械制造有限公司 | Novel coal sample collecting device |
| CN115864373A (en) * | 2022-11-18 | 2023-03-28 | 国网四川省电力公司成都供电公司 | Method and system for controlling running state of auxiliary equipment of transformer substation and electronic equipment |
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