Automatic control method for sintering centralized lubrication system

Abstract

The invention discloses an automatic control method for a sintering centralized lubricating system, and relates to the field of lubricating systems. The automatic control method for the sintering centralized lubrication system comprises the following steps that firstly, lubrication assemblies are installed; step 2, setting a program; step 3, lubricating point monitoring; fourthly, lubricating points are automatically lubricated; and step 5, fault detection. According to the automatic control method for the sintering centralized lubrication system, lubrication is timely, reliable and convenient through transformation of the lubrication system, the lubrication condition of equipment is improved, and stable and reliable operation of the equipment is greatly guaranteed. According to the system, the state and the position of a fault point are accurately reflected through one-by-one detection and timely feedback, daily maintenance and repair are facilitated, effective lubrication of each lubricating point is guaranteed, and accidents are avoided. Meanwhile, oil is supplied regularly and quantitatively, waste of lubricating grease is avoided, and the oil-saving effect is remarkable. And meanwhile, through automatic oil feeding, manual operation is omitted, and the labor cost can be effectively saved.

Description

Technical Field

[0001] The invention relates to the technical field of lubrication systems, and in particular to an automatic control method for a sintering centralized lubrication system. Background Art

[0002] The lubrication system of the sintering mixer and pelletizer adopts a point-type dry oil lubrication system. Since this lubrication system is manually operated, it has obvious defects: 1. There are multiple oil points, and each point needs to be refueled separately, which takes a long cycle and requires a lot of labor; 2. It is greatly affected by human factors, and fatigue and lack of responsibility will cause the failure to refuel on time; 3. It cannot guarantee the timely and quantitative supply of oil to each point, resulting in overflow waste when there is too much oil and insufficient lubrication when there is too little oil; 4. The valves are frequently opened and closed and are easily damaged, making maintenance difficult and costly.

[0003] Due to the existence of the above defects, it is difficult for workers to judge the oil supply status of each lubrication point of the equipment during daily production operations, which can easily cause serious wear of slideways, bearings, etc. when working in a state of oil shortage. In addition, the system consumes a lot of grease on a daily basis and has a high failure rate. The reliability and maintainability of the equipment are extremely poor, which seriously affects the normal operation of the equipment. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides an automatic control method for a sintering centralized lubrication system, which solves the problem that it is difficult for workers to judge the oil supply status of each lubrication point of the equipment, which easily causes serious wear of slideways, bearings, etc. when working in an oil-deficient state, and the problem that the existing system has large daily grease consumption, high failure rate, and extremely poor equipment reliability and maintainability.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a sintering centralized lubrication system automatic control method, comprising the following steps: Step 1: Lubrication component installation: an electromagnetic oiler and a flow sensor are installed at each lubrication point of the equipment, and a PLC controller is set between the multiple electromagnetic oilers and the lubrication pump and the refueling pump. The PLC controller is connected to the user-side computer through a signal. The PLC controller can control the opening and closing of the electromagnetic oiler, and cooperate with the lubrication pump and the refueling pump to add lubricating oil to the lubrication point; Step 2: Program setting: Set multiple lubrication points to supply oil in sequence through the PLC controller. The lubrication pump only supplies oil to one point per unit time, and set the oil supply time and oil supply interval; Step 3: Lubrication point monitoring: using the flow sensor installed at each lubrication point to detect the running status of the lubrication point in real time. The flow sensor detects whether each lubrication point needs oil supply in real time according to the above program settings, and the user-side computer remotely displays the lubrication status of the point; Step 4: Automatic lubrication of lubrication points. In the automatic operation state, the main control system runs according to the set program, starts the electric high-pressure lubrication pump, and controls the opening and closing of the electromagnetic oiler. The grease is filtered and transported to the electromagnetic oiler of each lubrication point, so that each lubrication point can be lubricated smoothly; Step 5: Fault detection: Use flow sensors to detect the oil supply status of lubrication points in real time, determine the lubrication status of each lubrication point, and determine the type of fault when a lubrication point fails.

[0006] Preferably, in step 1, the electromagnetic oil feeder and the flow sensor are connected with an identifier, and the PLC controller is signal-connected with a plurality of electromagnetic oil feeders through a plurality of identifiers.

[0007] Preferably, a repeater is provided between the PLC controller and the plurality of identifiers, and the repeater amplifies and regenerates the signal attenuated on the line so that the signal can be transmitted farther, thereby expanding the distance of network transmission.

[0008] Preferably, the procedure in step 2 satisfies the requirement that the oil supply volume for each point can be set to include but not limited to 1ml, 10ml and 100ml as needed, and the oil supply time and oil supply interval time can be arbitrarily set as needed.

[0009] Preferably, in step 2, the program can be interlocked with the equipment that needs lubrication in the point-by-point oil supply setting, the equipment re-detects when there is no interlock signal, and when the equipment sends a signal, the program can add lubricating oil through the lubrication pump and the oil pump.

[0010] Preferably, in step three, when the flow sensor detects the operating status of the lubrication point in real time, it will promptly alarm if there is a fault and can accurately determine the location of the fault point, which is convenient for the operator to maintain and repair.

[0011] Preferably, in step four, during the automatic lubrication of the lubrication points, the flow sensor installed at each lubrication point is used to detect the displacement signal of the oil in the pipeline in real time, truly reflecting the oil supply status of the lubrication point, and collecting pressure and pressure difference signals to truly feedback the oil supply status of the lubrication point, thereby realizing real-time monitoring of the lubrication process.

[0012] Preferably, in step four, the user-side calculator and PLC controller encode the output signal of the control module through the main control encoding module, and output it to the on-site lubricator box through serial output. The decoding module in the on-site lubricator box compares the signal received at the serial port with the set address, and then determines whether to provide data for the lubricator box. If the comparison is the same, the lubricator box cooperates with the lubrication pump to supply oil to the lubrication point according to pre-set parameters.

[0013] Preferably, the lubrication state in step 5 includes: Normal lubrication state: When the flow sensor detects that the lubricant flow is stable and meets the preset value, it can be judged that the lubrication point is in a normal lubrication state; at this time, the lubrication system operates normally and no additional intervention is required.

[0014] Insufficient lubrication state: If the flow sensor detects that the lubricant flow is lower than the preset value and the flow fluctuates greatly, it indicates that there is a problem of insufficient lubrication at the lubrication point; at this time, the system will sound an alarm to remind the operator to check and replenish the lubricant in time.

[0015] Over-lubrication condition: If the flow sensor detects that the lubricant flow is much higher than the preset value, it indicates that there is an over-lubrication problem at the lubrication point. This also requires the operator's attention to avoid unnecessary waste and potential mechanical failure.

[0016] Preferably, the fault types in step 5 include: Blockage failure: If the flow rate of the lubrication point suddenly drops or even reaches zero, accompanied by an increase in pressure, it indicates that the lubrication point has a blockage failure, which is caused by pipe blockage, filter blockage, or oiler failure. Leakage failure: If the flow rate of the lubrication point is continuously lower than the preset value and the pressure does not change significantly, it indicates that there is a leakage failure. The leakage occurs at the pipe connection, the seal failure point and the lubrication point itself; Lubricator failure: If the flow of the lubrication point cannot be adjusted and there is no flow output at all, it indicates that the lubricator of the lubrication point is faulty. The lubricator failure is caused by electromagnetic control failure, valve jamming and power failure.

[0017] The present invention discloses an automatic control method for a sintering centralized lubrication system, which has the following beneficial effects: 1. The automatic control method of the sintering centralized lubrication system, through the transformation of the lubrication system, makes the lubrication timely, reliable and convenient, improves the lubrication condition of the equipment, and greatly ensures the stable and reliable operation of the equipment. The system accurately reflects the state and location of the fault point through one-by-one detection and timely feedback, which is convenient for daily maintenance and repair, ensures the effective lubrication of each lubrication point, and avoids accidents. At the same time, the oil is supplied regularly and quantitatively to avoid the waste of lubricating grease, and the oil saving effect is significant. At the same time, the automatic oil supply eliminates the need for manual operation, which can effectively save labor costs.

[0018] 2. The automatic control method of the sintering centralized lubrication system is connected to the host computer through industrial Ethernet for real-time monitoring, so that the lubrication status is clear at a glance; the on-site oil distribution is directly controlled by the programmable controller, and the amount of oil supplied to each point each time and the length of the oil supply cycle time can be automatically controlled and can be easily adjusted; the flow sensor detects the operating status of each lubrication point in real time, and alarms in time if there is a fault, and can accurately determine the location of the fault point, which is convenient for the operator to maintain and repair.

[0019] 3. The automatic control method of the sintering centralized lubrication system allows the operator to remotely adjust the oil supply parameters through the touch screen according to the lubrication requirements of each point of the equipment to meet the different lubrication requirements of the lubrication points. The system runs stably and reliably, the oil supply is easy to adjust, the fault point is easy to find, the maintenance is small, and the labor intensity is greatly reduced, environmental pollution and grease waste are avoided, the service life of the equipment is extended, the maintenance is reduced, and the comprehensive benefits are improved.

[0020] 4. The automatic control method of the sintering centralized lubrication system is as follows: in the automatic operation state, the main control system operates according to the set program, starts the electric high-pressure lubrication pump, and controls the opening and closing of the electromagnetic oiler. The grease is filtered and transported to the electromagnetic oiler of each lubrication point. The flow sensor detects whether each point is supplied with oil in real time. The monitoring system remotely displays the lubrication status of the point and promptly alarms if there is a fault. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the process of the present invention; Figure 2 This is a control block diagram of the system of the present invention; Figure 3 This is a schematic diagram of the fault detection process of the present invention; Figure 4 A schematic diagram of the connection between the PLC and the calculator of the present invention; Figure 5 The present invention is a flowchart of a computer remotely displaying lubrication status. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] The embodiment of the present application provides an automatic control method for a sintering centralized lubrication system, thereby solving the problem that it is difficult for workers to judge the oil supply status of each lubrication point of the equipment, which easily causes serious wear of the slideways, bearings, etc. when working in a state of lack of oil, and the existing system has a large daily grease consumption, a high failure rate, and extremely poor equipment reliability and maintainability. Through the transformation of the lubrication system, lubrication is timely, reliable, and convenient, the lubrication condition of the equipment is improved, and the stable and reliable operation of the equipment is greatly guaranteed. The system accurately reflects the status and location of the fault point through one-by-one detection and timely feedback, which facilitates daily maintenance and repair, ensures effective lubrication of each lubrication point, and avoids accidents. At the same time, the oil is supplied at a fixed time and quantity to avoid the waste of lubricating grease, and the oil saving effect is significant. At the same time, automatic oil supply eliminates manual operation and effectively saves labor costs.

[0025] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0026] The embodiment of the invention discloses an automatic control method for a sintering centralized lubrication system.

[0027] According to the attached Figure 1-5 As shown, the following steps are included: Step 1: Lubrication component installation: an electromagnetic oiler and a flow sensor are installed at each lubrication point of the equipment, and a PLC controller is set between the multiple electromagnetic oilers and the lubrication pump and the refueling pump. The PLC controller is connected to the user-side computer through a signal. The PLC controller can control the opening and closing of the electromagnetic oiler, and cooperate with the lubrication pump and the refueling pump to add lubricating oil to the lubrication point; It should be particularly emphasized that a data acquisition unit and a remote communication module are arranged between the PLC controller and the user-side computer, wherein the data acquisition unit is responsible for collecting the sensor data transmitted by the PLC controller and performing preliminary processing, and the remote communication module transmits the collected data to the remote server and the user-side device through wired and wireless means, including but not limited to 4G, WiFi and Ethernet.

[0028] Step 2: Program setting: Set multiple lubrication points to supply oil in sequence through the PLC controller. The lubrication pump only supplies oil to one point per unit time, and set the oil supply time and oil supply interval; Step 3: Lubrication point monitoring: using the flow sensor installed at each lubrication point to detect the running status of the lubrication point in real time. The flow sensor detects whether each lubrication point needs oil supply in real time according to the above program settings, and the user-side computer remotely displays the lubrication status of the point; The specific implementation process of the user-side computer remotely displaying the lubrication status of the point includes the following steps: Data collection: The sensor collects various data of the lubrication system in real time and summarizes them through the data collection unit; Data transmission: Use the remote communication module to transmit the collected data to the remote server in real time.

[0029] Data processing and analysis: The remote server further processes and analyzes the received data to extract key information such as lubrication status and abnormal alarms.

[0030] Remote display: The user-side computer accesses the remote server to obtain the processed data and displays it to the user in a graphical and intuitive way. The user can view the real-time status, historical data and alarm record information of the lubrication system at any time.

[0031] Step 4: Automatic lubrication of lubrication points. In the automatic operation state, the main control system runs according to the set program, starts the electric high-pressure lubrication pump, and controls the opening and closing of the electromagnetic oiler. The grease is filtered and transported to the electromagnetic oiler of each lubrication point, so that each lubrication point can be lubricated smoothly; Step 5: Fault detection: Use flow sensors to detect the oil supply status of lubrication points in real time, determine the lubrication status of each lubrication point, and determine the type of fault when a lubrication point fails.

[0032] The system is connected to the host computer via industrial Ethernet for real-time monitoring, making the lubrication status clear at a glance; the on-site oil distribution is directly controlled by the programmable controller, and the amount of oil supplied to each point each time and the length of the oil supply cycle time can be automatically controlled and easily adjusted; the flow sensor detects the operating status of each lubrication point in real time, and alarms in time if there is a fault, and can accurately determine the location of the fault point, which is convenient for operators to maintain and repair.

[0033] The operator can adjust the oil supply parameters remotely through the touch screen according to the lubrication requirements of each point of the equipment to meet the different lubrication requirements of the lubrication points. The system runs stably and reliably, the oil supply is easy to adjust, the fault point is easy to find, the maintenance is small, and the labor intensity is greatly reduced, environmental pollution and grease waste are avoided, the service life of the equipment is extended, the maintenance is reduced, and the comprehensive benefits are improved.

[0034] In the automatic operation state, the main control system runs according to the set program, starts the electric high-pressure lubrication pump, and controls the opening and closing of the electromagnetic oiler. The grease is filtered and transported to the electromagnetic oiler of each lubrication point. The flow sensor detects whether each point is supplied with oil in real time. The monitoring system remotely displays the lubrication status of the point and promptly alarms if there is a fault.

[0035] When the system is running automatically, it will automatically supply oil to each lubrication point according to the set amount and detect each point one by one until all lubrication points are lubricated. Then it will enter the cycle waiting time. When the cycle waiting time is over, it will automatically carry out the next oiling process.

[0036] The control system can also be operated manually. In manual operation, enter the lubrication point number on the manual control screen of the touch screen, and then click manual control to correspond to the corresponding lubrication point on site. After turning on the electric high-pressure lubrication pump, the grease is injected into the main pipeline. When the pipeline pressure rises to 10MPa (this pressure can be between 5-30MPa depending on the distance of the pipeline), enter the number to select the on-site lubrication point number, and the corresponding point electromagnetic oiler receives a signal, opens the oil circuit, and injects the grease into the corresponding lubrication part.

[0037] Furthermore, in step 1, the electromagnetic oil feeder and the flow sensor are connected with an identifier, and the PLC controller is signal-connected with a plurality of electromagnetic oil feeders through a plurality of identifiers.

[0038] Furthermore, a repeater is provided between the PLC controller and the plurality of identifiers. The repeater amplifies and regenerates the signal attenuated on the line so that the signal can be transmitted farther, thereby expanding the transmission distance of the network.

[0039] It is particularly disclosed that the procedure in step 2 satisfies the requirement to set the oil volume for each oil supply point, including but not limited to 1ml, 10ml and 100ml, and the oil supply time and oil supply interval time can be arbitrarily set according to the requirement.

[0040] It is particularly disclosed that in step two, the program can be interlocked with the equipment that needs lubrication in the point-by-point oil supply setting, the equipment will be re-tested when there is no interlocking signal, and when the equipment sends a signal, the program can add lubricating oil through the lubrication pump and the refueling pump.

[0041] Furthermore, in step three, when the flow sensor detects the operating status of the lubrication point in real time, it will promptly alarm if there is a fault and can accurately determine the location of the fault point, which is convenient for the operator to maintain and repair.

[0042] It is particularly disclosed that in step four, during the automatic lubrication of the lubrication points, the flow sensor installed at each lubrication point is used to detect the displacement signal of the oil in the pipeline in real time, truly reflecting the oil supply status of the lubrication point, and collecting pressure and pressure difference signals to truly feedback the oil supply status of the lubrication point, thereby realizing real-time monitoring of the lubrication process.

[0043] Furthermore, in step four, the user-side calculator and PLC controller encode the output signal of the control module through the main control encoding module, and output it to the on-site lubricator box through serial output. The decoding module in the on-site lubricator box compares the signal received at the serial port with the set address, and then determines whether to provide data for the lubricator box. If the comparison is the same, the lubricator box cooperates with the lubrication pump to supply oil to the lubrication point according to pre-set parameters.

[0044] Furthermore, the lubrication state in step 5 includes: Normal lubrication state: When the flow sensor detects that the lubricant flow is stable and meets the preset value, it can be judged that the lubrication point is in a normal lubrication state; at this time, the lubrication system operates normally and no additional intervention is required.

[0045] Insufficient lubrication state: If the flow sensor detects that the lubricant flow is lower than the preset value and the flow fluctuates greatly, it indicates that there is a problem of insufficient lubrication at the lubrication point; at this time, the system will sound an alarm to remind the operator to check and replenish the lubricant in time.

[0046] Over-lubrication condition: If the flow sensor detects that the lubricant flow is much higher than the preset value, it indicates that there is an over-lubrication problem at the lubrication point. This also requires the operator's attention to avoid unnecessary waste and potential mechanical failure.

[0047] Furthermore, the fault types in step 5 include: Blockage failure: If the flow rate of the lubrication point suddenly drops or even reaches zero, accompanied by an increase in pressure, it indicates that the lubrication point has a blockage failure, which is caused by pipe blockage, filter blockage, or oiler failure. Leakage failure: If the flow rate of the lubrication point is continuously lower than the preset value and the pressure does not change significantly, it indicates that there is a leakage failure. The leakage occurs at the pipe connection, the seal failure point and the lubrication point itself; Lubricator failure: If the flow of the lubrication point cannot be adjusted and there is no flow output at all, it indicates that the lubricator of the lubrication point is faulty. The lubricator failure is caused by electromagnetic control failure, valve jamming and power failure.

[0048] Through the transformation of the lubrication system, lubrication is timely, reliable and convenient, which improves the lubrication condition of the equipment and greatly ensures the stable and reliable operation of the equipment. The system accurately reflects the status and location of the fault point through one-by-one detection and timely feedback, which facilitates daily maintenance and repair, ensures the effective lubrication of each lubrication point, and avoids accidents. At the same time, the oil is supplied at a fixed time and quantity to avoid the waste of lubricating grease, and the oil saving effect is significant. At the same time, the automatic oil supply eliminates the need for manual operation and effectively saves labor costs.

[0049] The system is connected to the host computer via industrial Ethernet for real-time monitoring, making the lubrication status clear at a glance; the on-site oil distribution is directly controlled by the programmable controller, and the amount of oil supplied to each point each time and the length of the oil supply cycle time can be automatically controlled and easily adjusted; the flow sensor detects the operating status of each lubrication point in real time, and alarms in time if there is a fault, and can accurately determine the location of the fault point, which is convenient for operators to maintain and repair.

[0050] The operator can adjust the oil supply parameters remotely through the touch screen according to the lubrication requirements of each point of the equipment to meet the different lubrication requirements of the lubrication points. The system runs stably and reliably, the oil supply is easy to adjust, the fault point is easy to find, the maintenance is small, and the labor intensity is greatly reduced, environmental pollution and grease waste are avoided, the service life of the equipment is extended, the maintenance is reduced, and the comprehensive benefits are improved.

[0051] In the automatic operation state, the main control system runs according to the set program, starts the electric high-pressure lubrication pump, and controls the opening and closing of the electromagnetic oiler. The grease is filtered and transported to the electromagnetic oiler of each lubrication point. The flow sensor detects whether each point is supplied with oil in real time. The monitoring system remotely displays the lubrication status of the point and promptly alarms if there is a fault.

[0052] When the system is running automatically, it will automatically supply oil to each lubrication point according to the set amount and detect each point one by one until all lubrication points are lubricated. Then it will enter the cycle waiting time. When the cycle waiting time is over, it will automatically carry out the next oiling process.

[0053] It is particularly disclosed that the control system can be operated automatically and manually respectively; During manual operation, enter the lubrication point number on the manual control screen of the touch screen, and then click manual control to correspond to the corresponding lubrication point on site. After turning on the electric high-pressure lubrication pump, the grease is injected into the main pipeline. When the pipeline pressure rises to 10MPa (this pressure can be between 5-30MPa depending on the distance of the pipeline), enter the number to select the on-site lubrication point number, and the corresponding point electromagnetic oiler receives a signal, opens the oil circuit, and injects the grease into the corresponding lubrication part.

[0054] During automatic operation, switch the operation mode to automatic on the touch screen, and then click automatic start. At this time, the system enters the self-check state and detects the system parameters. If the system has an interlock control signal connected to an external sintering machine, it can enter the next step of automatic oil supply process according to the interlock signal instruction. If the user adopts local automatic operation, there is no need to detect the interlock signal, and the local automatic cycle starts and runs according to the set time.

[0055] After automatic startup, the system begins to read the oil pump parameters, which are set by the user in advance. If the parameter is 1 or 3, the 1# oil supply pump is turned on; if the parameter is 2 or 4, the 2# standby oil supply pump is turned on.

[0056] After the oil supply pump is turned on and started, the system encodes the output signal of the Siemens S7-200 control module through the main control encoding module, and outputs it to the on-site oiler box through serial. The decoding module in the on-site oiler box compares the signal received by the serial port with the set address, and then determines whether to provide data for the oiler box. If the comparison is the same, the four points in the oiler box supply oil to the lubrication points according to the pre-set parameters. The oil supply sequence starts from the 1# lubrication point. At this time, the solenoid valve of the 1# lubrication point is opened, and oil is pumped according to the set oil volume. Then the flow sensor installed on the oiler will detect the oiling process. If the flow sensor detects the oil volume and gives feedback within the set time, it is considered normal. The system will automatically close the 1# lubrication point and start to open the 2# lubrication point for oil supply. After the 2# oiling is completed, the 3# lubrication point will be oiled. Similarly, the system automatically supplies oil to the next 200 lubrication points one by one and detects them one by one until all lubrication points are lubricated. Then the system enters the cycle waiting time (adjustable, such as 30 minutes). When the cycle waiting time is over, the system automatically carries out the next oiling process.

[0057] If the flow sensor does not detect the flow rate and give feedback after the solenoid valve of lubrication point 1# is opened to supply oil, the system will re-control and open the lubrication point to supply oil again until the lubrication time of this point is over and the next lubrication point starts the lubrication process. During the lubrication process, if no flow rate feedback is detected at a lubrication point, it will be regarded as abnormal. The system will automatically output the blockage alarm signal of this point to the touch screen and the site until the oil supply of all lubrication points in the entire process is completed. All abnormally blocked lubrication points will be recorded on the touch screen to facilitate user inspection and maintenance.

[0058] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A method for automatic control of a sintering centralized lubrication system, characterized in that: The following steps are involved: Step 1: Lubrication component installation: an electromagnetic oiler and a flow sensor are installed at each lubrication point of the equipment, and a PLC controller is set between the multiple electromagnetic oilers and the lubrication pump and the refueling pump. The PLC controller is connected to the user-side computer through a signal. The PLC controller can control the opening and closing of the electromagnetic oiler, and cooperate with the lubrication pump and the refueling pump to add lubricating oil to the lubrication point; Step 2: Program setting: Set multiple lubrication points to supply oil in sequence through the PLC controller. The lubrication pump only supplies oil to one point per unit time, and set the oil supply time and oil supply interval; Step 3: Lubrication point monitoring: using the flow sensor installed at each lubrication point to detect the running status of the lubrication point in real time. The flow sensor detects whether each lubrication point needs oil supply in real time according to the above program settings, and the user-side computer remotely displays the lubrication status of the point; Step 4: Automatic lubrication of lubrication points. In the automatic operation state, the main control system runs according to the set program, starts the electric high-pressure lubrication pump, and controls the opening and closing of the electromagnetic oiler. The grease is filtered and transported to the electromagnetic oiler of each lubrication point, so that each lubrication point can be lubricated smoothly; Step 5: Fault detection: Use flow sensors to detect the oil supply status of lubrication points in real time, determine the lubrication status of each lubrication point, and determine the type of fault when a lubrication point fails.

2. The automatic control method of a sintering centralized lubrication system according to claim 1 is characterized in that: In the step 1, the electromagnetic oil feeder and the flow sensor are connected with an identifier, and the PLC controller is signal-connected with a plurality of electromagnetic oil feeders through a plurality of identifiers.

3. The automatic control method of a sintering centralized lubrication system according to claim 2 is characterized in that: A repeater is arranged between the PLC controller and the plurality of identifiers. The repeater amplifies and regenerates the signal attenuated on the line so that the signal can be transmitted farther, thereby expanding the distance of network transmission.

4. The automatic control method of a sintering centralized lubrication system according to claim 1, characterized in that: The procedure in step 2 satisfies the requirement to set the oil volume for each oil supply point, including but not limited to 1 ml, 10 ml and 100 ml, and the oil supply time and oil supply interval can be set arbitrarily according to the requirement.

5. The automatic control method of a sintering centralized lubrication system according to claim 1, characterized in that: In the step 2, the program can be interlocked with the equipment that needs lubrication in the point-by-point oil supply setting, and the equipment will re-detect when there is no interlock signal. When the equipment sends a signal, the program can add lubricating oil through the lubrication pump and the oil pump.

6. The automatic control method of a sintering centralized lubrication system according to claim 1, characterized in that: In the step three, when the flow sensor detects the operating status of the lubrication point in real time, it will give an alarm in time if there is a fault, and can accurately determine the location of the fault point, which is convenient for the operator to maintain and repair.

7. The automatic control method of a sintering centralized lubrication system according to claim 1, characterized in that: In step 4, during the automatic lubrication of the lubrication points, the flow sensor installed at each lubrication point is used to detect the displacement signal of the oil in the pipeline in real time, truly reflect the oil supply status of the lubrication point, and collect pressure and pressure difference signals to truly feedback the oil supply status of the lubrication point, thereby realizing real-time monitoring of the lubrication process.

8. The automatic control method of a sintering centralized lubrication system according to claim 1, characterized in that: In step 4, the user-side computer and PLC controller encode the output signal of the control module through the main control encoding module, and output it to the on-site lubricator box through serial output. The decoding module in the on-site lubricator box compares the signal received at the serial port with the set address, and then determines whether to provide data for the lubricator box. If the comparison is the same, the lubricator box cooperates with the lubrication pump to supply oil to the lubrication point according to pre-set parameters.

9. The automatic control method of a sintering centralized lubrication system according to claim 1, characterized in that: The lubrication state in step 5 includes: Normal lubrication state: When the flow sensor detects that the lubricant flow is stable and meets the preset value, it can be judged that the lubrication point is in a normal lubrication state; Insufficient lubrication state: If the flow sensor detects that the lubricant flow is lower than the preset value and the flow fluctuates greatly, it indicates that the lubrication point has insufficient lubrication; Over-lubrication state: If the flow sensor detects that the lubricant flow is much higher than the preset value, it indicates that there is an over-lubrication problem at the lubrication point.

10. The automatic control method of a sintering centralized lubrication system according to claim 1, characterized in that: The fault types in step 5 include: Blockage failure: If the flow rate of the lubrication point suddenly drops or even reaches zero, accompanied by an increase in pressure, it indicates that the lubrication point has a blockage failure, which is caused by pipe blockage, filter blockage, or oiler failure. Leakage failure: If the flow rate of the lubrication point is continuously lower than the preset value and the pressure does not change significantly, it indicates that there is a leakage failure. The leakage occurs at the pipe connection, the seal failure point and the lubrication point itself; Lubricator failure: If the flow of the lubrication point cannot be adjusted and there is no flow output at all, it indicates that the lubricator of the lubrication point is faulty. The lubricator failure is caused by electromagnetic control failure, valve jamming and power failure.

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