Multi-contact quantitative lubrication control system of roller press

Abstract

The utility model relates to the technical field of cement production, and discloses a multi-contact quantitative lubrication control system of a roller press, a lubrication control module comprises a control cabinet and oil pipes, the control cabinet is used for independently controlling each lubrication point, and the oil pipes comprise a main oil pipe and branch oil pipes of the lubrication points. Each branch oil pipe is provided with an independent flow control device and an independent time control device, and the oil filling amount and the oil filling interval time of each lubricating point are set through the control cabinet. The hydraulic system module comprises a hydraulic system body, a standby pump, three groups of nitrogen buffer devices and a roller withdrawing device, the standby pump is mounted on the hydraulic system body and is connected with a main pump of the hydraulic system body in parallel, the three groups of nitrogen buffer devices are all connected with the hydraulic system body, and the roller withdrawing device is connected with a roller transmission mechanism of the roller press. Through precise lubrication and intelligent hydraulic control, energy conservation, emission reduction, cost reduction and efficiency improvement are achieved, oil consumption and labor cost are reduced, and equipment stability and production efficiency are improved.

Description

Technical Field

[0001] This utility model belongs to the field of cement production technology, specifically relating to a multi-contact quantitative lubrication control system for a roller press. Background Technology

[0002] In modern cement production processes, roller presses are key grinding equipment that crushes and grinds materials by applying high pressure. Their operating efficiency and stability directly affect the quality and cost of cement production. With the continuous increase in cement industry capacity and increasingly stringent requirements for energy conservation and emission reduction, the optimization and upgrading of roller press equipment performance has become a key focus of the industry.

[0003] Currently, the lubrication and hydraulic control systems of roller presses generally suffer from technical shortcomings. Regarding lubrication systems, traditional oil-suction lubrication systems mostly employ a centralized oil supply model, which cannot provide differentiated, quantitative, and timed oil replenishment based on the actual needs of different lubrication points such as roller press bearings, transmission gears, and couplings. On-site personnel must frequently manually adjust lubrication parameters, which is not only labor-intensive but also makes it difficult to ensure the accuracy and timeliness of lubrication, resulting in significant oil waste. Statistics show that the annual lubricating oil consumption of four conventional roller presses is high. Furthermore, due to inaccurate lubrication, equipment component wear is accelerated, shortening equipment lifespan and increasing maintenance costs.

[0004] At the hydraulic system level, existing roller press hydraulic systems mostly rely on single-pump operation, lacking a backup guarantee mechanism. Once the main pump fails, it can easily lead to equipment shutdown, affecting production continuity. The number of nitrogen buffer devices is insufficient, and their buffering effect is limited, making it difficult to effectively suppress hydraulic system pressure fluctuations. This results in unstable pressure during roller press operation, affecting material grinding efficiency and equipment stability. The hydraulic system's valve seat pressure-holding performance is poor, posing a risk of hydraulic oil leakage, reducing system energy efficiency and increasing energy costs. Furthermore, when the roller press experiences a shutdown fault, there is a lack of automated roller unwinding devices, requiring manual operation, which is inefficient and poses significant safety risks.

[0005] In view of this, we propose a multi-contact quantitative lubrication control system for roller presses to solve the above problems. Utility Model Content

[0006] The present invention aims to solve the technical problems of the prior art where the lubrication system of the roller press adopts centralized oil supply, which cannot replenish oil quantitatively and at regular intervals, resulting in oil waste, cumbersome manual operation, and severe equipment wear; and the hydraulic system has poor buffering and pressure holding performance due to single pump operation.

[0007] The purpose of this utility model is to provide a multi-contact quantitative lubrication control system for roller presses. By adding a control system, the system can quantitatively and regularly replenish oil at each lubrication point of the roller press, reducing on-site workload and oil waste. At the same time, the hydraulic system and other components are upgraded and modified to improve the working efficiency, operational stability, and operating rate of the roller press, reduce equipment accidents, and optimize and improve production and economic indicators.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A multi-contact quantitative lubrication control system for a roller press includes:

[0010] The lubrication control module includes a control cabinet and oil pipes. The control cabinet is set according to the location of the field equipment and site, and is used to control each lubrication point individually. The oil pipes include a main oil pipe and branch oil pipes for each lubrication point. One end of each branch oil pipe is connected to the main oil pipe, and the other end is connected to the corresponding lubrication point. Each branch oil pipe is equipped with an independent flow control device and a time control device. The flow control device and the time control device are electrically connected to the control cabinet. The lubrication amount and lubrication interval time for each lubrication point are set through the control cabinet.

[0011] The hydraulic system module includes a hydraulic system body, a standby pump, three sets of nitrogen buffer devices, and a roll retraction device. The standby pump is installed in the hydraulic system body and is connected in parallel with the main pump of the hydraulic system body. All three sets of nitrogen buffer devices are connected to the hydraulic system body. The roll retraction device is connected to the roll drive mechanism of the roll press.

[0012] Preferably, the control cabinet is equipped with a programmable logic controller (PLC), which is connected to the flow control device and time control device on each branch oil pipe to receive and process signals and control the refueling amount and refueling time interval.

[0013] Preferably, the flow control device is an electromagnetic flow meter, and the time control device is a time relay, with the electromagnetic flow meter and the time relay connected in series on the branch oil pipe.

[0014] Preferably, a pressure sensor is installed in the oil circuit of the hydraulic system body. The pressure sensor is electrically connected to the control cabinet to detect the hydraulic system pressure and feed back the signal to the control cabinet.

[0015] Preferably, the roll unwinding device includes a motor, a transmission gear set, and a lead screw and nut mechanism. The output shaft of the motor is connected to the transmission gear set, the transmission gear set is connected to the lead screw of the lead screw and nut mechanism, the nut of the lead screw and nut mechanism is fixedly connected to the roll transmission mechanism of the roller press, and the motor is electrically connected to the control cabinet.

[0016] Preferably, lubrication points are distributed in multiple locations on the roller press, including bearings, drive gears, and couplings.

[0017] As a preferred embodiment, the main oil line of the hydraulic system body is provided with three equally spaced branch pipe interfaces, and three nitrogen buffer devices are connected to the branch pipe interfaces through high-pressure hoses.

[0018] Preferably, each nitrogen buffer device is equipped with a pressure regulating valve and a safety valve at its inlet. The pressure regulating valve is used to adjust the pre-charge pressure of the buffer device, and the safety valve is used to prevent the system from overpressure.

[0019] Compared with the prior art, the technical effects and advantages of this utility model are:

[0020] (1) The multi-contact quantitative lubrication control system of this roller press replenishes oil to each lubrication point of the roller press in a quantitative and timed manner, reducing the annual oil consumption of the four roller presses, saving grease costs, reducing the intensity of manual operation, reducing equipment wear, and extending the service life of the equipment. The programmable logic controller in the control cabinet, combined with the electromagnetic flow meter and time relay, realizes high-precision and flexible lubrication control, and can adjust the lubrication strategy according to the equipment operating conditions to ensure that the equipment is always in the best lubrication condition.

[0021] (2) The standby pump is designed to run in parallel with the main pump. When the main pump fails, the standby pump starts quickly, reducing downtime. Three sets of nitrogen buffer devices effectively stabilize the pressure of the roller press and reduce the impact of pressure fluctuations on the equipment. The pressure sensor monitors and provides feedback in real time, enabling intelligent control of the hydraulic system.

[0022] (3) The automated roll unwinding device replaces manual rotation, responds quickly, shortens fault handling time, reduces human safety risks, and can accurately control the roll unwinding stroke and speed; the pressure regulating valve and safety valve of the nitrogen buffer device provide pressure regulation and overpressure protection to ensure the safe operation of the hydraulic system. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the hydraulic system module of this utility model;

[0025] Figure 3 This is a schematic diagram of the lubrication control module of this utility model;

[0026] Figure 4 This is a schematic diagram of the structure of the roll retraction device of this utility model.

[0027] In the diagram: 100, Lubrication control module; 11, Control cabinet; 12, Main oil pipe; 13, Branch oil pipe; 14, Lubrication point; 15, Flow control device; 16, Time control device;

[0028] 200. Hydraulic system module; 21. Hydraulic system body; 22. Standby pump; 23. Main pump; 24. Nitrogen buffer device; 25. Roll unwinding device; 26. Branch pipe interface; 27. High-pressure hose; 28. Pressure regulating valve; 29. ​​Safety valve; 210. Pressure sensor; 211. Main oil circuit; 212. Motor; 213. Transmission gear set; 214. Screw and nut mechanism;

[0029] 300. Roller press; 31. Roller drive mechanism. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] The following combination Figures 1 to 4 This application will be described in further detail.

[0032] This application discloses a multi-contact quantitative lubrication control system for a roller press, including a lubrication control module 100 and a hydraulic system module 200;

[0033] The lubrication control module 100 includes a control cabinet 11 and oil pipes. The control cabinet 11 is set according to the location of the field equipment and site, and is used to control each lubrication point 14 individually. The oil pipes include a main oil pipe 12 and branch oil pipes 13 for each lubrication point 14. One end of each branch oil pipe 13 is connected to the main oil pipe 12, and the other end is connected to the corresponding lubrication point 14. Each branch oil pipe 13 is equipped with an independent flow control device 15 and a time control device 16. The flow control device 15 and the time control device 16 are electrically connected to the control cabinet 11. The control cabinet 11 is used to set the amount of oil added and the oiling interval for each lubrication point 14. The lubrication points 14 are distributed in multiple locations on the roller press 300, including bearings, transmission gears, couplings, etc.

[0034] The lubrication points 14 at more than 300 locations on the roller press (bearings, transmission gears, couplings, etc.) are individually controlled to achieve quantitative and timed oil replenishment, avoiding the oil waste problem of traditional dry oil systems. At the same time, it reduces frequent manual operation, lowers the workload on site, and precise lubrication can reduce equipment wear, extend equipment service life, and ensure stable equipment operation.

[0035] The control cabinet 11 is equipped with a programmable logic controller (PLC). The PLC is connected to the flow control device 15 and the time control device 16 on each branch oil pipe 13 to receive and process signals and control the amount of fuel added and the time interval between fueling operations.

[0036] The flow control device 15 is an electromagnetic flow meter, and the time control device 16 is a time relay. The electromagnetic flow meter and the time relay are connected in series on the branch oil pipe 13.

[0037] The programmable logic controller (PLC) possesses powerful logic processing and signal control capabilities. It can quickly and accurately receive signals from the flow control device 15 and time control device 16 on each branch oil pipe 13. After analysis and processing through a preset program, it precisely controls the amount of oil added and the oiling time interval. Compared with traditional control methods, it offers higher control precision and greater flexibility. It can flexibly adjust the lubrication strategy according to different operating conditions and running time of the equipment, ensuring that the equipment is always in the best lubrication state.

[0038] The electromagnetic flowmeter accurately measures the flow rate of lubricating oil in the branch oil pipe 13, providing accurate data support for quantitative lubrication. The time relay controls the on / off state of the branch oil pipe 13 according to a set time interval, achieving timed lubrication. The two work in series and cooperate with each other to ensure that each lubrication point 14 receives accurate oil volume and appropriate lubrication time, guaranteeing the scientific and effective lubrication of the equipment. Moreover, both the electromagnetic flowmeter and the time relay are mature industrial devices with low cost, high reliability, and convenient maintenance.

[0039] The hydraulic system module 200 includes a hydraulic system body 21, a standby pump 22, three sets of nitrogen buffer devices 24, and a roll retraction device 25. The standby pump 22 is installed on the hydraulic system body 21 and is connected in parallel with the main pump 23 of the hydraulic system body 21. All three sets of nitrogen buffer devices 24 are connected to the hydraulic system body 21. The roll retraction device 25 is connected to the roll drive mechanism 31 of the roll press 300.

[0040] A pressure sensor 210 is installed in the oil circuit of the hydraulic system body 21. The pressure sensor 210 is electrically connected to the control cabinet 11 and is used to detect the hydraulic system pressure and feed back the signal to the control cabinet 11.

[0041] The backup pump 22 works in parallel with the main pump 23, along with three sets of nitrogen buffer devices 24, pressure sensor 210, and roll retraction device 25, to comprehensively improve the stability of the hydraulic system and the operating efficiency of the equipment. This reduces the risk of downtime due to malfunctions and minimizes equipment accidents; stabilizes the 300 pressure of the roller press, improving work efficiency; and solves the problem of manual rotation during shutdowns, increasing equipment uptime, such as increasing cement mill output and reducing power consumption in cement processing.

[0042] When the main pump 23 fails, the standby pump 22 can be quickly started and put into operation to ensure the normal oil supply of the hydraulic system, avoid equipment downtime due to the failure of the main pump 23, greatly reduce downtime, and improve the continuous operation capability and production efficiency of the equipment. At the same time, this redundancy design improves the reliability and stability of the hydraulic system and reduces production losses caused by hydraulic system failures.

[0043] Pressure sensor 210 detects the hydraulic system pressure in real time and feeds the signal back to control cabinet 11, enabling operators to monitor the pressure status of the hydraulic system in real time. Based on the pressure signal, control cabinet 11 can intelligently regulate the hydraulic system. For example, when the pressure is too high, it can automatically adjust the pump output or start the safety valve 29 to relieve pressure. When the pressure is too low, it can start the standby pump 22 or adjust the system parameters to ensure that the hydraulic system pressure is stable within a reasonable range, thereby realizing intelligent and automated control of the hydraulic system.

[0044] The roll unwinding device 25 includes a motor 212, a transmission gear set 213, and a lead screw and nut mechanism 214. The output shaft of the motor 212 is connected to the transmission gear set 213. The transmission gear set 213 is connected to the lead screw of the lead screw and nut mechanism 214. The nut of the lead screw and nut mechanism 214 is fixedly connected to the roll transmission mechanism 31 of the roll press 300. The motor 212 is electrically connected to the control cabinet 11.

[0045] The motor 212 transmits power to the roller drive mechanism 31 of the roller press 300 via the transmission gear set 213 and the lead screw and nut mechanism 214 to realize the roll unwinding operation. Compared with manual rotation, the automated roll unwinding device 25 is more efficient, can respond quickly when the roller press 300 stops, shortens the processing time, reduces manual labor intensity and safety risks; and the transmission gear set 213 and the lead screw and nut mechanism 214 provide smooth transmission and accurate transmission ratio, which can precisely control the roll unwinding stroke and speed, ensuring the accuracy and stability of the roll unwinding operation.

[0046] The main oil circuit 211 of the hydraulic system body 21 has three equally spaced branch pipe interfaces 26. Three nitrogen buffer devices 24 are connected to the branch pipe interfaces 26 through high-pressure hoses 27. Each nitrogen buffer device 24 is equipped with a pressure regulating valve 28 and a safety valve 29 at its inlet. The pressure regulating valve 28 is used to regulate the pre-charge pressure of the buffer device, and the safety valve 29 is used to prevent the system from overpressure.

[0047] Three sets of nitrogen buffer devices 24 are connected to the main oil circuit 211 of the hydraulic system body 21, which can more effectively absorb the pressure fluctuations of the hydraulic system, making the pressure of the roller press 300 more stable, reducing the impact and wear caused by pressure fluctuations on the equipment, and extending the service life of the equipment; the pressure regulating valve 28 can adjust the pre-charge pressure of the buffer device according to the actual working conditions to achieve the best buffering effect; the safety valve 29 provides overpressure protection for the system to prevent damage to the equipment and pipelines due to excessive pressure and ensure the safe operation of the hydraulic system.

[0048] This multi-contact quantitative lubrication control system for the roller press consists of a control cabinet 11, a main oil pipe 12, and branch oil pipes 13. The main oil pipe 12 has an optimized layout to reduce bends and length, lowering oil circuit resistance. The branch oil pipes 13 connect multiple lubrication points 14 of the roller press 300, including bearings, transmission gears, and couplings, providing a physical channel for precise oil supply. Each branch oil pipe 13 is connected in series with an electromagnetic flowmeter and a time relay. The former monitors the lubricating oil flow in real time, converting the data into electrical signals that are transmitted to the programmable logic controller (PLC) in the control cabinet 11. The latter controls the on / off time of the oil pipe according to a preset program. After receiving the flow signal and time command, the PLC calculates using algorithms to precisely control the amount and interval of oil added to each branch oil pipe 13, achieving differentiated quantitative and timed oil replenishment for multiple lubrication points 14. The PLC has powerful logic processing capabilities and can dynamically adjust the lubrication strategy based on the roller press 300's operating time, load changes, and other conditions. For example, when the equipment is operating under high load, it automatically shortens the oiling interval and increases the oiling amount to ensure the equipment is in optimal lubrication condition.

[0049] In the hydraulic system module 200, the standby pump 22 is connected in parallel with the main pump 23 to the hydraulic system body 21. Under normal operating conditions, the main pump 23 operates. When the pressure sensor 210 detects an abnormal output pressure of the main pump 23 (such as a sudden drop), the signal is fed back to the control cabinet 11. The PLC immediately controls the switching device to start the standby pump 22 to take over the operation of the main pump 23, maintain a stable oil supply to the hydraulic system, and ensure continuous operation of the equipment.

[0050] Three sets of nitrogen buffer devices 24 are connected to the main oil circuit 211 via high-pressure hoses 27 and are evenly distributed along the pressure transmission path. When the hydraulic system pressure fluctuates, the nitrogen in the buffer devices is compressed or expanded under pressure, absorbing or releasing pressure energy and smoothing the pressure curve. The pressure regulating valve 28 can adjust the pre-charge pressure of the buffer devices as needed to adapt to different working conditions; the safety valve 29 automatically opens to relieve pressure when the system pressure exceeds the limit, providing double protection for system pressure stability.

[0051] Pressure sensor 210 monitors the hydraulic system pressure in real time and transmits the data to control cabinet 11. The PLC compares the pressure setpoint with the measured value. When the pressure is too high, it controls the pump to reduce its output power or opens safety valve 29 to relieve pressure; when the pressure is too low, it starts the standby pump 22 or adjusts system parameters to achieve closed-loop automatic control of the hydraulic system pressure. When the roller press 300 trips, control cabinet 11 receives a fault signal and controls the start of motor 212 of the roll retraction device 25. Motor 212 transmits power to the screw and nut mechanism 214 through transmission gear set 213. The screw rotation drives the nut to move linearly, thereby driving the roller transmission mechanism 31 of the roller press 300 to achieve automatic roll retraction, replacing manual rotation, and providing rapid response and precise control of the roll retraction stroke and speed.

[0052] This system combines automated control with mechanical structure optimization through the coordinated operation of lubrication and hydraulic modules, ensuring the efficient operation of the 300 roller press from multiple aspects such as precise lubrication, stable power, and intelligent regulation.

[0053] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A multi-contact quantitative lubrication control system for a roller press, characterized in that, include: The lubrication control module (100) includes a control cabinet (11) and oil pipes. The control cabinet (11) is set according to the location of the field equipment and site, and is used to control each lubrication point (14) individually. The oil pipes include a main oil pipe (12) and branch oil pipes (13) for each lubrication point (14). One end of the branch oil pipe (13) of each lubrication point (14) is connected to the main oil pipe (12), and the other end is connected to the corresponding lubrication point (14). Each branch oil pipe (13) is equipped with an independent flow control device (15) and a time control device (16). The flow control device (15) and the time control device (16) are electrically connected to the control cabinet (11). The amount of oil added and the oiling interval time of each lubrication point (14) are set through the control cabinet (11). The hydraulic system module (200) includes a hydraulic system body (21), a standby pump (22), three sets of nitrogen buffer devices (24) and a roll retraction device (25). The standby pump (22) is installed on the hydraulic system body (21) and is connected in parallel with the main pump (23) of the hydraulic system body (21). All three sets of nitrogen buffer devices (24) are connected to the hydraulic system body (21). The roll retraction device (25) is connected to the roll drive mechanism (31) of the roll press (300).

2. The multi-contact quantitative lubrication control system for a roller press according to claim 1, characterized in that: The control cabinet (11) is equipped with a programmable logic controller (PLC). The PLC is connected to the flow control device (15) and time control device (16) on each branch oil pipe (13) to receive and process signals and control the amount of fuel and the refueling time interval.

3. The multi-contact quantitative lubrication control system for a roller press according to claim 1, characterized in that: The flow control device (15) is an electromagnetic flow meter, and the time control device (16) is a time relay. The electromagnetic flow meter and the time relay are connected in series on the branch oil pipe (13).

4. The multi-contact quantitative lubrication control system for a roller press according to claim 1, characterized in that: A pressure sensor (210) is installed in the oil circuit of the hydraulic system body (21). The pressure sensor (210) is electrically connected to the control cabinet (11) and is used to detect the hydraulic system pressure and feed back the signal to the control cabinet (11).

5. A multi-contact quantitative lubrication control system for a roller press according to claim 1, characterized in that: The roll unwinding device (25) includes a motor (212), a transmission gear set (213), and a screw and nut mechanism (214). The output shaft of the motor (212) is connected to the transmission gear set (213). The transmission gear set (213) is connected to the screw drive of the screw and nut mechanism (214). The nut of the screw and nut mechanism (214) is fixedly connected to the roller drive mechanism (31) of the roller press (300). The motor (212) is electrically connected to the control cabinet (11).

6. The multi-contact quantitative lubrication control system for a roller press according to claim 1, characterized in that: Lubrication points (14) are distributed in multiple locations on the roller press (300), including bearings, transmission gears, and couplings.

7. The multi-contact quantitative lubrication control system for a roller press according to claim 1, characterized in that: The main oil circuit (211) of the hydraulic system body (21) is provided with three equally spaced branch pipe interfaces (26), and three nitrogen buffer devices (24) are connected to the branch pipe interfaces (26) through high pressure hoses (27).

8. A multi-contact quantitative lubrication control system for a roller press according to claim 1, characterized in that: Each nitrogen buffer device (24) is equipped with a pressure regulating valve (28) and a safety valve (29) at its inlet. The pressure regulating valve (28) is used to regulate the pre-charge pressure of the buffer device, and the safety valve (29) is used to prevent the system from overpressure.

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