An automatic lubrication method for coal preparation equipment

Abstract

The application discloses an automatic lubricating method for a coal preparation equipment, and relates to the technical field of the coal preparation equipment.The application is used to solve the problem that the coal preparation equipment has a huge workload of corresponding lubricating parts, low maintenance efficiency, and is prone to abnormal wear, corrosion and other conditions, thereby causing the coal preparation equipment to be out of service.The application judges whether the lubricating oil in the lubricating oil container can be used according to the deterioration index of the lubricating oil, timely reminds the maintenance personnel to replace the deteriorated lubricating oil, avoids the equipment failure or damage caused by the use of expired or aged lubricating oil, and realizes the intelligent control of the automatic lubrication of the coal preparation equipment through the corresponding operation of the controller according to the discharge signal or the cleaning signal of the lubricating part, so that the performance and quality of the lubricating oil are guaranteed, the lubricating effect of the lubricating oil is improved, the maintenance efficiency of the coal preparation equipment is improved, and the workload of manual lubrication is further reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coal preparation equipment, in particular to an automatic lubrication method for coal preparation equipment. BACKGROUND

[0002] Coal preparation is to break and sieve the raw coal mined from the mine, and then wash and select the coal according to the particle size to remove impurities in the coal, reduce the ash content, maximize the use of coal resources, reduce the pollution to the environment when burning coal and manufacturing products, and achieve the principle of low-carbon and environmental protection energy utilization. The coal preparation equipment is an equipment for separating coal into various final products with different indicators according to the physical and chemical properties of raw coal.

[0003] The lubrication of the coal preparation equipment is an important part of the normal operation of the coal preparation equipment. The maintenance personnel need to regularly check the lubrication parts of the coal preparation equipment to determine whether the lubricating oil in the lubrication parts needs to be replaced. The replacement of the lubricating oil and the cleaning of the lubrication parts of the coal preparation equipment are dependent on manual operation. However, due to the large number of parts that need to be lubricated in the coal preparation equipment, the workload of the maintenance personnel is increased, and the maintenance efficiency is low. If the lubrication equipment maintenance is omitted, the coal preparation equipment may be abnormally worn and corroded, and even the coal preparation equipment may be shut down due to failure. SUMMARY

[0004] The present application relates to the technical field of coal preparation equipment, in particular to an automatic lubrication method for coal preparation equipment.

[0005] The present application relates to the technical field of coal preparation equipment, in particular to an automatic lubrication method for coal preparation equipment.

[0006] Step one, analyze the storage conditions of the lubricating oil, uniformly mark the parts that need to be lubricated in the coal preparation equipment to obtain the lubrication parts, record the opening date of the lubricating oil container, sample the air in the lubricating oil container to obtain an air sample, detect the oxygen and moisture in the air sample to obtain the oxygen content in the air sample and the moisture content in the air sample, analyze to obtain the air influence factor in the lubricating oil container, obtain the volume of the lubricating oil container from the database, measure the oil level in the lubricating oil container, calculate the air volume by the difference between the volume of the lubricating oil container and the oil level in the lubricating oil container, analyze the air volume and the opening date to obtain the deterioration index of the lubricating oil in the lubricating oil container, compare the deterioration index of the lubricating oil with the preset deterioration index threshold, and generate a replacement signal when the deterioration index of the lubricating oil is greater than the preset deterioration index threshold, otherwise generate a refueling signal.

[0007] Step two, analyzing the lubrication part of the coal preparation equipment, sampling the lubricating oil corresponding to the lubrication part of the coal preparation equipment to obtain a lubricating oil sample, recording the weight of the lubricating oil sample, filtering the lubricating oil sample to obtain lubricating oil impurities, weighing the lubricating oil impurities, using a dropper to extract the filtered lubricating oil sample to obtain an oil droplet sample, placing the oil droplet sample at a set height, recording the dropping time of the oil droplet sample according to the action of gravity, matching the dropping time with the viscosity corresponding to the set dropping time to obtain the viscosity of the oil droplet sample, further analyzing to obtain the replacement index of the lubricating oil corresponding to the lubrication part, comparing the replacement index of the lubricating oil corresponding to the lubrication part with the first replacement index threshold and the second replacement index threshold, generating a discharge signal or a cleaning signal based on the comparison result, obtaining the number of the current lubrication part, taking the number of the lubrication part and the cleaning signal as cleaning information, taking the number of the lubrication part and the discharge signal as discharge information, and sending the cleaning information or the discharge information to the controller.

[0008] Step three, identifying the discharge signal or the cleaning signal, discharging the lubricating oil in the lubrication part through the discharge pipe when the discharge signal is identified, counting the discharge volume of the lubricating oil corresponding to the lubrication part in the discharge pipe, obtaining the filling volume of the lubricating oil corresponding to the lubrication part according to the number of the lubrication part, analyzing the discharge purity of the lubrication part based on the discharge volume and the filling volume, comparing the discharge purity of the lubrication part with the preset discharge purity threshold, generating a filling signal when the discharge purity of the lubrication part is less than the preset discharge purity threshold, cleaning the lubrication part through the cleaning nozzle when the cleaning signal is identified, generating a filling signal after cleaning is completed, and sending the filling signal and the number of the lubrication part to the controller as filling information.

[0009] Step four, identifying the use signal and the filling signal, and filling new lubricating oil into the lubrication part according to the number of the lubrication part in the filling information when the use signal and the filling signal are identified at the same time.

[0010] Preferably, the storage conditions of the lubricating oil are analyzed, and the analysis process is as follows:

[0011] The date of opening the lubricating oil container is recorded to obtain the opening date, the air in the current lubricating oil container is sampled according to the set collection volume to obtain an air sample, the oxygen content and moisture content in the air sample are detected using an oxygen sensor and a moisture sensor, the oxygen volume Vo and the moisture volume Vw in the air sample are calculated by the volume calculation formula, and the air influence factor a1 in the lubricating oil container is calculated by the formula e is a natural constant, and V is the set collection volume.

[0012] The oil level and the acid-base value of the lubricating oil in the lubricating oil container are collected by the pressure type liquid level sensor and the acid-base sensor equipped at the corresponding pipe orifice of the oil delivery pipe. If the oil level in the lubricating oil container is less than the preset oil level threshold, a replacement signal is generated. If the oil level in the lubricating oil container is greater than the preset oil level threshold, the radius of the lubricating oil container and the volume of the lubricating oil container are obtained from the database. The volume of the lubricating oil in the lubricating oil container is calculated by the volume calculation formula according to the liquid level in the lubricating oil container. The air volume V2 in the lubricating oil container is obtained by subtracting the volume of the lubricating oil in the lubricating oil container from the volume of the lubricating oil container.

[0013] The air volume in the lubricating oil container and the acid-base value of the lubricating oil are normalized and the numerical values are obtained. The deterioration index BZ of the lubricating oil is calculated by the formula BZ=V2×a1+(T-t)×a2+PH×a3, t is the opening date of the lubricating oil, a2 is a preset opening time influence factor, PH is the acid-base value of the lubricating oil in the lubricating oil container, and a3 is a preset acid-base value influence factor. The deterioration index of the lubricating oil is compared with the preset deterioration index threshold. When the deterioration index of the lubricating oil is greater than the preset deterioration index threshold, it indicates that the lubricating oil in the lubricating oil container is deteriorated due to the influence of air after opening. A replacement signal is generated, and the oil pump is closed to prohibit the oil pump from adding lubricating oil to the lubricating part of the coal preparation equipment. Otherwise, an injection signal is generated.

[0014] Preferably, the lubricating part of the coal preparation equipment is analyzed, and the analysis process is as follows:

[0015] The lubricating oil of the corresponding lubricating part of the coal preparation equipment is sampled to obtain a lubricating oil sample. The lubricating oil sample is weighed to obtain the weight G of the lubricating oil sample. The lubricating oil sample is filtered by filter paper to obtain lubricating oil impurities. The lubricating oil impurities are weighed to obtain the weight ZG of the lubricating oil impurities. The filtered lubricating oil sample is extracted by a dropper to obtain an oil droplet sample.

[0016] The dropper is placed at a set height, and the current time is recorded as the static time. When the oil droplet sample in the dropper drops from the dropper, the current time is recorded as the dropping time. The dropping time and the static time are calculated by the difference formula to obtain the dropping time of the oil droplet sample. The dropping time is matched with the viscosity corresponding to the set dropping time to obtain the viscosity ND of the oil droplet sample.

[0017] The replacement index HX of the lubricating oil corresponding to the lubricating part is calculated by the formula ​The weight difference of the allowable impurities is nd, the preset viscosity threshold is b1, the preset impurity influence factor is b2, the new index of the lubricating oil corresponding to the lubricating part is compared with the preset first new index threshold and the second new index threshold, the first new index threshold is less than the second new index threshold, when the new index of the lubricating oil corresponding to the lubricating part is greater than the preset first new index threshold, it is judged that the state of the lubricating oil corresponding to the lubricating part is a scrap state, an emission signal is generated, and the emission signal and the number of the lubricating part are sent to the controller as emission information; when the new index of the lubricating oil corresponding to the lubricating part is greater than the preset second new index threshold, it is judged that the state of the lubricating oil corresponding to the lubricating part is a heavy pollution state, a cleaning signal is generated, and the cleaning signal and the number of the lubricating part are sent to the controller as cleaning information;

[0018] When the new index of the lubricating oil corresponding to the lubricating part is less than the preset first new index threshold, the color value of the lubricating oil sample is collected by the colorimeter, the color value interval corresponding to the lubricating oil of the preset grade is the first color value interval and the second color value interval, the color value corresponding to the lubricating oil is matched with the color value interval corresponding to the lubricating oil, if the color value of the lubricating oil belongs to the first color value interval, the date of the current system is summed with the set first time length to obtain the first emission date, if the color value of the lubricating oil belongs to the second color value interval, the date of the current system is summed with the set second time length to obtain the second emission date, the number of the current lubricating part is obtained, and the number of the lubricating part, the first emission date or the second emission date is stored as monitoring information;

[0019] The emission date in the monitoring information is monitored, and the system date is compared with the first emission date and the second emission date in the monitoring information, if the system date is equal to the first emission date or the system date is equal to the second emission date, an emission signal is generated, and the emission signal and the number of the lubricating part are sent to the controller as emission information.

[0020] Preferably, the emission signal or the cleaning signal is identified, and the identification process is as follows:

[0021] The emission information is received and the emission signal in the emission information is identified, and when the emission signal is identified, step A1 is executed:

[0022] A1, the lubricating oil in the lubricating part is marked as waste lubricating oil, the waste lubricating oil is discharged by opening the discharge pipe, the discharge volume VP of the waste lubricating oil in the discharge pipe is counted, the lubricating oil filling volume VJ of the lubricating part is obtained from the database according to the number of the lubricating part in the emission information, and the discharge purity JD of the lubricating oil corresponding to the lubricating part is calculated by the formula ​The preset allowed volume difference is a constant, the discharge purity of the lubricating oil corresponding to the lubricating part is compared with the preset discharge purity threshold value, if the discharge purity of the lubricating oil corresponding to the lubricating part is greater than the preset discharge purity threshold value, it indicates that the discarded lubricating oil does not reach the discharge standard, the volume of the residual part of the discarded lubricating oil in the lubricating part exceeds the allowed residual volume, and the discharge needs to be continued, if the discharge purity of the lubricating oil corresponding to the lubricating part is less than the preset discharge purity threshold value, it indicates that the discarded lubricating oil is basically discharged, new lubricating oil can be filled into the part, a filling signal is generated, and the filling signal and the number of the lubricating part are sent to the controller as filling information.

[0023] The cleaning information is received, and a cleaning signal in the cleaning information is identified, and when the cleaning signal is identified, step A2 is performed:

[0024] A2, the lubricating oil in the lubricating part is marked as heavily contaminated lubricating oil, after the heavily contaminated lubricating oil is discharged from the lubricating part through the discharge pipe, the cleaning nozzle is enabled, the lubricating part is cleaned by the cleaning solvent extracted through the cleaning pipe, then the cleaning solvent is discharged through the discharge pipe, and after the discharge is completed, a filling signal is generated, and the filling signal and the number of the lubricating part are sent to the controller as filling information.

[0025] Preferably, the use signal and the filling signal are identified, and the identification process is as follows:

[0026] The filling information is received, the use signal and the filling signal are identified, when the use signal and the filling signal are identified at the same time, the number of the lubricating part in the filling information is acquired, the lubricating oil filling volume of the lubricating part is acquired according to the number of the lubricating part, the controller controls the oil pump to extract lubricating oil equal to the lubricating oil filling volume from the lubricating oil container, and the lubricating oil is transported to the lubricating part through the oil pipe, and when the use signal is not identified, corresponding prompts are sent to the maintenance personnel.

[0027] The beneficial effects of the present application are:

[0028] 1. The present application judges whether the lubricating oil in the lubricating oil container can be used by the deterioration index of the lubricating oil in the lubricating oil container, considers the influence of the opening time of the lubricating oil container, the oxygen and moisture in the air in the lubricating oil container on the lubricating oil, avoids the phenomenon that the lubricating part in the coal preparation equipment is excessively worn, rusted and corroded due to the deterioration of the lubricating oil, prolongs the service life of the coal preparation equipment, and improves the reliability and stability of the coal preparation equipment.

[0029] 2. By analyzing the lubricating parts in the coal preparation equipment, it is determined whether the lubricating oil needs to be replaced or cleaned, the replacement cycle of the lubricating oil is determined, and a reasonable maintenance plan is made to avoid early or late replacement of the lubricating oil, improve the economic applicability of the lubricating oil, ensure that the equipment is always in good lubrication state while providing constant lubricating oil supply, and reduce wear and failure;

[0030] 3. The controller performs corresponding operations according to the discharge signal or the cleaning signal of the lubricating part, realizes intelligent control of automatic lubrication of the coal preparation equipment, ensures the performance and quality of the lubricating oil, improves the lubricating effect of the lubricating oil, and strengthens the maintenance efficiency of the coal preparation equipment, thereby further reducing the workload of manual lubrication. BRIEF DESCRIPTION OF DRAWINGS

[0031] The application will be further described below with reference to the drawings.

[0032] Figure 1 is a method step flow chart of the application. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the application.

[0034] Please refer to Figure 1 The application is an automatic lubrication method for a coal preparation equipment, which comprises the following steps:

[0035] The storage conditions of the lubricating oil are analyzed, and the analysis process is as follows:

[0036] The date of opening the lubricating oil container is recorded to obtain the opening date, the air in the current lubricating oil container is sampled according to the set collection volume to obtain an air sample, the oxygen content and the moisture content in the air sample are detected by using an oxygen sensor and a moisture sensor, the oxygen volume Vo and the moisture volume Vw in the air sample are calculated by a volume calculation formula, and the air influence factor a1 in the lubricating oil container is calculated by a formula e is a natural constant, and V is the set collection volume.

[0037] It should be noted that the oxygen volume = (oxygen content / 100) x V, the moisture volume = (moisture content / 100) x V, and the lubricating oil container is a cylindrical container.

[0038] The oil level and the acid-base value of the lubricating oil in the lubricating oil container are collected by the pressure type liquid level sensor and the acid-base sensor equipped at the corresponding pipe orifice of the oil delivery pipe, if the oil level in the lubricating oil container is less than the preset oil level threshold, a replacement signal is generated, if the oil level in the lubricating oil container is greater than the preset oil level threshold, the radius of the lubricating oil container and the volume of the lubricating oil container are obtained from the database, the volume of the lubricating oil in the lubricating oil container is calculated according to the liquid level in the lubricating oil container by a volume calculation formula, and the volume V2 of air in the lubricating oil container is obtained by subtracting the volume of the lubricating oil in the lubricating oil container from the volume of the lubricating oil container.

[0039] The current date is collected to obtain a system date and is recorded as T, the volume of air in the lubricating oil container and the acid-base value of the lubricating oil are normalized and the values are taken, the deterioration index BZ of the lubricating oil is calculated by the formula BZ=V2×a1+(T-t)×a2+PH×a3, t is the opening date of the lubricating oil, a2 is a preset opening time influence factor, PH is the acid-base value of the lubricating oil in the lubricating oil container, a3 is a preset acid-base value influence factor, the deterioration index of the lubricating oil is compared with the preset deterioration index threshold, when the deterioration index of the lubricating oil is greater than the preset deterioration index threshold, it indicates that the lubricating oil in the lubricating oil container is deteriorated due to the influence of air after opening, a replacement signal is generated, the oil pump is closed, and the oil pump is prohibited to add lubricating oil to the lubricating part of the coal preparation equipment, when the deterioration index of the lubricating oil is less than the preset deterioration index threshold, a use signal is generated.

[0040] The deterioration index of the lubricating oil is obtained by analyzing the lubricating oil container, whether the lubricating oil in the lubricating oil container can be used is judged according to the deterioration index of the lubricating oil, when the lubricating oil cannot be used, the maintenance personnel is reminded to replace the deteriorated lubricating oil in time, so that the equipment failure or damage caused by the use of expired or aged lubricating oil is avoided, further, by considering the opening time of the lubricating oil container, the influence of the air in the lubricating oil container on the lubricating oil, the phenomenon of excessive wear, rust and corrosion of the lubricating part in the coal preparation equipment caused by the deterioration of the lubricating oil is avoided, the service life of the coal preparation equipment is prolonged, and the reliability and stability of the coal preparation equipment are improved.

[0041] The lubricating part of the coal preparation equipment is analyzed, and the analysis process is as follows:

[0042] The lubricating oil of the corresponding lubricating part of the coal preparation equipment is sampled to obtain a lubricating oil sample, the lubricating oil sample is weighed to obtain the weight G of the lubricating oil sample, the lubricating oil sample is filtered by filter paper to obtain lubricating oil impurities, the lubricating oil impurities are weighed to obtain the weight ZG of the lubricating oil impurities, and the filtered lubricating oil sample is extracted by a dropper to obtain an oil droplet sample.

[0043] The current time is recorded as a static time after the dropper is placed at a set height, the current time is recorded as a dropping time when the oil droplet sample in the dropper drops from the dropper, the dropping time and the static time are calculated by a difference formula to obtain the dropping duration of the oil droplet sample, and the viscosity corresponding to the set dropping duration is matched to obtain the viscosity ND of the oil droplet sample.

[0044] The application can determine the replacement cycle of the lubricating oil and formulate a reasonable maintenance plan by analyzing the impurities and viscosity of the lubricating oil corresponding to the lubricating part, judging whether the lubricating oil has reached the replacement standard, avoiding early or late replacement of the lubricating oil, and improving the economic applicability of the lubricating oil.

[0045] The replacement index HX of the lubricating oil corresponding to the lubricating part is calculated by the formula HX is the replacement index of the lubricating oil corresponding to the lubricating part, nd is the preset viscosity threshold, b1 is the preset impurity influence factor, and b2 is the viscosity influence factor. The replacement index of the lubricating oil corresponding to the lubricating part is compared with the preset replacement index threshold, and the replacement index of the lubricating oil corresponding to the lubricating part is compared with the first replacement index threshold and the second replacement index threshold. The first replacement index threshold is less than the second replacement index threshold. When the replacement index of the lubricating oil corresponding to the lubricating part is greater than the preset first replacement index threshold, it is judged that the state of the lubricating oil corresponding to the lubricating part is a scrap state, a discharge signal is generated, and the discharge signal and the number of the lubricating part are sent to the controller as discharge information. When the replacement index of the lubricating oil corresponding to the lubricating part is greater than the preset second replacement index threshold, it is judged that the state of the lubricating oil corresponding to the lubricating part is a heavy pollution state, a cleaning signal is generated, and the cleaning signal and the number of the lubricating part are sent to the controller as cleaning information.

[0046] When the replacement index of the lubricating oil corresponding to the lubricating part is less than the preset first replacement index threshold, the color value of the lubricating oil sample is collected by a colorimeter, the color value interval corresponding to the preset lubricating oil is a first color value interval and a second color value interval, the color value corresponding to the lubricating oil is matched with the color value interval corresponding to the lubricating oil, if the color value of the lubricating oil belongs to the first color value interval, the date of the current system is summed with the set first time length to obtain a first discharge date, if the color value of the lubricating oil belongs to the second color value interval, the date of the current system is summed with the set second time length to obtain a second discharge date, the number of the current lubricating part is obtained, and the number of the lubricating part, the first discharge date or the second discharge date is stored as monitoring information.

[0047] ​It should be noted that, for example, the first time length is three months, the system date is 2016 / 3 / 21, and the first discharge date is 2016 / 6 / 21. When the second time length is one month, the system date is 2016 / 3 / 21, and the second discharge date is 2016 / 4 / 21.

[0048] The discharge date in the monitoring information is monitored, and the system date is compared with the first discharge date and the second discharge date in the monitoring information. If the system date is equal to the first discharge date or the system date is equal to the second discharge date, a discharge signal is generated. The discharge signal and the number of the lubrication site are sent to the controller as discharge information.

[0049] Further, when the lubrication site corresponding to the lubricating oil does not reach the replacement standard, the replacement date of the lubrication site corresponding to the lubricating oil is set according to the color grade. When the lubrication site of the coal preparation equipment is checked again, the lubrication site with the discharge date does not need to be checked again, and the discharge signal is generated directly when the discharge date is reached, saving system resources while ensuring timely replacement of the lubrication site corresponding to the lubricating oil, reducing manual intervention and maintaining normal operation of the coal preparation equipment.

[0050] The discharge signal or the cleaning signal is identified, and the identification process is as follows:

[0051] The discharge information is received and the discharge signal in the discharge information is identified. When the discharge signal is identified, the lubricating oil in the lubrication site is marked as waste lubricating oil, the discharge pipe is opened to discharge the waste lubricating oil, the discharge volume VP of the waste lubricating oil in the discharge pipe is counted, and the lubricating oil filling volume VJ of the lubrication site is obtained from the database according to the number of the lubrication site in the discharge information. The discharge purity JD of the lubrication site corresponding to the lubricating oil is calculated by the formula is a preset allowed volume difference, and is a constant. The discharge purity of the lubrication site corresponding to the lubricating oil is compared with the preset discharge purity threshold. If the discharge purity of the lubrication site corresponding to the lubricating oil is greater than the preset discharge purity threshold, it means that the waste lubricating oil does not meet the discharge standard, and the residual volume of the waste lubricating oil in the lubrication site exceeds the allowed residual volume, and further discharge is needed. If the discharge purity of the lubrication site corresponding to the lubricating oil is less than the preset discharge purity threshold, it means that the waste lubricating oil is basically empty, and new lubricating oil can be filled into the site. An injection signal is generated, and the injection signal and the number of the lubrication site are sent to the controller as injection information.

[0052] It should be noted that is a constant, and the specific value is determined by the reference consumption of various types of lubricating oil.

[0053] ​The application judges whether the residual volume of the waste lubricating oil in the lubricating position exceeds the set volume by counting the discharge volume of the waste lubricating oil, so as to determine whether to add new lubricating oil to the lubricating position, thereby avoiding that the residual waste lubricating oil reduces the service life of the newly added lubricating oil and affects the performance and quality of the lubricating oil.

[0054] The cleaning information is received and the cleaning signal in the cleaning information is identified, when the cleaning signal is identified, the lubricating oil in the lubricating position is marked as heavily contaminated lubricating oil, after the heavily contaminated lubricating oil is discharged from the lubricating position through the discharge pipe, the cleaning nozzle is enabled, the lubricating position is cleaned by the cleaning solvent extracted through the cleaning pipe, then the cleaning solvent is discharged through the discharge pipe, after the discharge is completed, the filling signal is generated, the filling signal and the number of the lubricating position are sent to the controller as the filling information.

[0055] The filling information is received, the use signal and the filling signal are identified, when the use signal and the filling signal are simultaneously identified, the number of the lubricating position in the filling information is acquired, the lubricating oil filling volume of the lubricating position is acquired according to the number of the lubricating position, the oil pump is controlled by the controller to extract the lubricating oil with the same amount as the lubricating oil filling volume from the lubricating oil container, the lubricating oil is transported to the lubricating position through the oil conveying pipe, when the use signal is not identified, the corresponding prompt is sent to the maintenance personnel.

[0056] The above is only an example and description of the structure of the application, and those skilled in the art can make similar modifications or supplements or substitutions to the described specific embodiments, as long as they do not deviate from the structure of the application or exceed the scope defined by the present claims, which should belong to the protection scope of the application.

Claims

1. A method of automatic lubrication for coal preparation plant, characterised by, Comprise the following steps: Step one, analyze the storage condition of lubricating oil, mark the lubricating parts of the coal preparation equipment to obtain the lubricating parts, record the opening date of the lubricating oil container, sample the air in the lubricating oil container to obtain the air sample, detect the oxygen content and moisture content in the air sample to obtain the air influence factor in the lubricating oil container, obtain the volume of the lubricating oil container from the database, measure the oil level in the lubricating oil container, calculate the air volume by the difference between the volume of the lubricating oil container and the oil level in the lubricating oil container, analyze the air volume, the acid-base value of the lubricating oil in the lubricating oil container, the system date and the opening date to obtain the deterioration index of the lubricating oil in the lubricating oil container; compare the deterioration index of the lubricating oil with the preset deterioration index threshold value, when the deterioration index of the lubricating oil is greater than the preset deterioration index threshold value, generate a replacement signal, otherwise, generate a use signal; Step two, analyze the lubricating parts of the coal preparation equipment, sample the lubricating oil of the corresponding lubricating parts of the coal preparation equipment to obtain the lubricating oil sample, record the weight of the lubricating oil sample, filter the lubricating oil sample to obtain the lubricating oil impurities, weigh the lubricating oil impurities, use a dropper to extract the filtered lubricating oil sample to obtain an oil droplet sample, place the oil droplet sample at a set height, record the falling time of the oil droplet sample according to the action of gravity, match the falling time with the corresponding viscosity of the set falling time to obtain the viscosity of the oil droplet sample, and further analyze to obtain the replacement index of the lubricating oil corresponding to the lubricating part; compare the replacement index of the lubricating oil corresponding to the lubricating part with the first replacement index threshold value and the second replacement index threshold value, and generate a discharge signal or a cleaning signal based on the comparison result; Step three, identify the discharge signal or the cleaning signal, when the discharge signal is identified, the lubricating oil in the lubricating part is discharged through the discharge pipe, the discharge volume of the lubricating oil corresponding to the lubricating part in the discharge pipe is counted, the filling volume of the lubricating oil corresponding to the lubricating part is obtained according to the number of the lubricating part, the discharge purity of the lubricating part is analyzed based on the discharge volume and the filling volume, and the discharge purity of the lubricating part is compared with the preset discharge purity threshold value, when the discharge purity of the lubricating part is less than the preset discharge purity threshold value, a filling signal is generated, when the cleaning signal is identified, the lubricating part is cleaned through the cleaning nozzle, and a filling signal is generated after cleaning, and the filling signal and the number of the lubricating part are sent to the controller as filling information; Step four, identify the use signal and the filling signal, when the use signal and the filling signal are identified at the same time, new lubricating oil is filled into the lubricating part according to the number of the lubricating part in the filling information.

2. An automatic lubrication method for coal preparation plant according to claim 1, characterized in that, The analysis of the storage condition of the lubricating oil is as follows: The date of opening the lubricating oil container is recorded to obtain an opening date, air in the current lubricating oil container is sampled according to a set sampling volume to obtain an air sample, oxygen content and moisture content in the air sample are detected by using an oxygen sensor and a moisture sensor, oxygen volume and moisture volume in the air sample are calculated by a volume calculation formula, and an air influencing factor in the lubricating oil container is obtained by analysis; The oil level and the acid-base value of the lubricating oil in the lubricating oil container are collected by the pressure type liquid level sensor and the acid-base sensor arranged at the corresponding pipe orifice of the oil conveying pipe, if the oil level in the lubricating oil container is less than a preset oil level threshold, a replacement signal is generated, if the oil level in the lubricating oil container is greater than the preset oil level threshold, the radius of the lubricating oil container and the volume of the lubricating oil container are obtained from the database, the volume of the lubricating oil in the lubricating oil container is calculated by the volume calculation formula according to the liquid level in the lubricating oil container, and the volume of air in the lubricating oil container is obtained by subtracting the volume of the lubricating oil in the lubricating oil container from the volume of the lubricating oil container. The current date is collected to obtain a system date, the volume of air in the lubricating oil container and the acid-base value of the lubricating oil are normalized and the numerical values are taken, and a deterioration index of the lubricating oil is obtained by analysis.

3. An automatic lubrication method for coal preparation equipment according to claim 1, characterized in that, The lubricating parts of the coal preparation equipment are analyzed, and the analysis process is as follows: The lubricating oil of the corresponding lubricating part of the coal preparation equipment is sampled to obtain a lubricating oil sample, the lubricating oil sample is weighed to obtain the weight of the lubricating oil sample, the lubricating oil sample is filtered by filter paper to obtain lubricating oil impurities, the lubricating oil impurities are weighed to obtain the weight of the lubricating oil impurities, and the filtered lubricating oil sample is extracted by a dropper to obtain an oil droplet sample; The dropper is placed at a set height, and the current time is recorded as a static time, the oil droplet sample in the dropper is dropped from the dropper, and the current time is recorded as a dropping time, the dropping time and the static time are calculated by a difference formula to obtain the dropping duration of the oil droplet sample, and the viscosity of the oil droplet sample is matched with the viscosity corresponding to the set dropping duration to obtain the viscosity of the oil droplet sample. The replacement index of the lubricating oil corresponding to the lubricating part is obtained by analysis, and the replacement index of the lubricating oil corresponding to the lubricating part is compared with a preset first replacement index threshold and a second replacement index threshold, wherein the first replacement index threshold is less than the second replacement index threshold, when the replacement index of the lubricating oil corresponding to the lubricating part is greater than the preset first replacement index threshold, it is judged that the state of the lubricating oil corresponding to the lubricating part is a scrap state, a discharge signal is generated, and the discharge signal and the number of the lubricating part are sent to the controller as discharge information, when the replacement index of the lubricating oil corresponding to the lubricating part is greater than the preset second replacement index threshold, it is judged that the state of the lubricating oil corresponding to the lubricating part is a heavy pollution state, a cleaning signal is generated, and the cleaning signal and the number of the lubricating part are sent to the controller as cleaning information. When the change index of the lubricating oil corresponding to the lubricating part is less than the preset first change index threshold, the color value of the lubricating oil sample is collected by the colorimeter, the color value interval corresponding to the lubricating oil of the preset grade is the first color value interval and the second color value interval, the color value corresponding to the lubricating oil is matched with the color value interval corresponding to the lubricating oil, if the color value of the lubricating oil belongs to the first color value interval, the first discharge date is obtained by analysis, if the color value of the lubricating oil belongs to the second color value interval, the second discharge date is obtained by analysis, the number of the current lubricating part is obtained, and the number of the lubricating part and the first discharge date or the second discharge date are stored as monitoring information; The discharge date in the monitoring information is monitored, the system date is compared with the first discharge date and the second discharge date in the monitoring information, if the system date is equal to the first discharge date or the system date is equal to the second discharge date, a discharge signal is generated, and the discharge signal and the number of the lubricating part are sent to the controller as discharge information.

4. An automatic lubrication method for a coal preparation plant according to claim 3, characterized in that, The discharge signal or the cleaning signal is identified, and the identification process is as follows: The discharge information is received, and the discharge signal in the discharge information is identified, when the discharge signal is identified, step A1 is performed: A1, the lubricating oil in the lubricating part is marked as waste lubricating oil, the waste lubricating oil is discharged through the discharge pipe, the discharge volume of the waste lubricating oil in the discharge pipe is counted, the lubricating oil filling volume of the lubricating part is obtained from the database according to the number of the lubricating part in the discharge information, the discharge purity of the lubricating oil corresponding to the lubricating part is obtained by analysis, the discharge purity of the lubricating oil corresponding to the lubricating part is compared with the preset discharge purity threshold, if the discharge purity of the lubricating oil corresponding to the lubricating part is less than the preset discharge purity threshold, a filling signal is generated, and the filling signal and the number of the lubricating part are sent to the controller as filling information; The cleaning information is received, and the cleaning signal in the cleaning information is identified, when the cleaning signal is identified, step A2 is performed: A2, the lubricating oil in the lubricating part is marked as heavily contaminated lubricating oil, after the heavily contaminated lubricating oil is discharged from the lubricating part through the discharge pipe, the cleaning nozzle is enabled, the lubricating part is cleaned by extracting the cleaning solvent through the cleaning pipe, then the cleaning solvent is discharged through the discharge pipe, and after the discharge is completed, a filling signal is generated, and the filling signal and the number of the lubricating part are sent to the controller as filling information.

5. An automatic lubrication method for coal preparation equipment according to claim 1, characterized in that, The use signal and the filling signal are identified, and the identification process is as follows: The filling information is received, and the use signal and the filling signal are identified, when the use signal and the filling signal are identified at the same time, the number of the lubricating part in the filling information is obtained, new lubricating oil is filled into the lubricating part based on the number of the lubricating part, and when the use signal is not identified, corresponding prompts are sent to the maintenance personnel.

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