Distributed oil-gas lubrication system for steel rolling rotating hub area and cooperative control method of distributed oil-gas lubrication system

Abstract

The invention discloses a distributed oil-gas lubrication system for a steel rolling rotating hub area and a cooperative control method thereof, and relates to the technical field of steel rolling rotating hub area lubrication.The distributed oil-gas lubrication system comprises a hydraulic main station and a gas source, the hydraulic main station and the gas source are connected to a plurality of oil-gas substations, and the oil-gas substations correspond to different areas of the steel rolling rotating hub area; the oil-gas substation comprises an oil inlet pipeline and a gas inlet pipeline which are respectively communicated with the hydraulic main station and the gas source, an oil inlet valve and a gas inlet valve which are used for controlling opening and closing are respectively arranged on the oil inlet pipeline and the gas inlet pipeline, the oil inlet pipeline is communicated to a progressive distributor, and the progressive distributor and the gas inlet pipeline are communicated to an oil-gas mixing block; and the output end of the oil-gas mixing block is communicated to each lubricating point in the corresponding area. Through a distributed architecture and substation independent control, the equipment availability and the production continuity are improved; and meanwhile, on-demand lubrication is achieved, waste of a low-temperature area is avoided, and the effect of saving lubricating oil consumption is achieved.

Description

Technical Field

[0001] This invention relates to the field of lubrication technology for the rolling mill hub area, and particularly to a distributed oil-air lubrication system and its coordinated control method for the rolling mill hub area. Background Technology

[0002] In bar rolling mill production, the rotating hub area equipment, due to its continuous rotation and heavy load characteristics, places extremely high demands on the reliability and precision of bearing lubrication. Currently, the commonly used "dual-line oil supply lubrication system" in this area has the following main drawbacks: Poor reliability: The system is centrally controlled. If any lubrication point or pipeline is blocked or leaked, the entire system must be shut down to deal with it, which will cause the entire production line to be interrupted and cause huge economic losses. Low lubrication precision: The operating conditions (such as temperature and load) of equipment in different locations of the hub area vary significantly, but the existing system can only supply oil uniformly and cannot distribute it according to demand. This often leads to insufficient lubrication of bearings in high-temperature areas, resulting in increased wear, while in low-temperature areas, there is excess oil, causing oil accumulation and polluting equipment and the environment. Maintenance difficulties: Traditional compression fitting rigid pipe connections are prone to loosening, the system lacks effective regional monitoring and isolation methods, and fault location and repair are time-consuming and labor-intensive. Summary of the Invention

[0003] The purpose of this invention is to provide a distributed oil-air lubrication system and its collaborative control method for the steel rolling mill hub area. Through a distributed architecture and independent control of substations, "fault isolation" is achieved, and single-point maintenance does not require a complete production shutdown, which greatly improves equipment availability and production continuity. At the same time, "on-demand lubrication" is achieved, which can accurately allocate oil volume according to the temperature and load of different areas, ensuring lubrication in high-temperature areas while avoiding waste in low-temperature areas, thus saving lubricating oil consumption.

[0004] The above-mentioned technical objective of the present invention is achieved through the following technical solution: A distributed oil-air lubrication system for a steel rolling mill hub includes a hydraulic master station and an air source. The hydraulic master station and the air source are connected to several oil-air substations, each corresponding to a different area of ​​the steel rolling mill hub. Each oil-air substation includes an oil inlet pipeline and an air inlet pipeline connected to the hydraulic master station and the air source, respectively. The oil inlet pipeline and the air inlet pipeline are respectively equipped with an oil inlet valve and an air inlet valve for controlling their opening and closing. The oil inlet pipeline is connected to a progressive distributor. The progressive distributor and the air inlet pipeline are connected to an oil-air mixing block. The output end of the oil-air mixing block is connected to each lubrication point in the corresponding area.

[0005] Furthermore, the rolling mill area is divided according to operating temperature, with one oil and gas substation corresponding to one operating temperature range.

[0006] Furthermore, the hydraulic master station includes a pump set, which includes at least two gear pumps, one in use and one on standby.

[0007] Furthermore, the pump unit starts when the pressure is below a preset pressure A and stops when the preset pressure B is reached.

[0008] Furthermore, the pressure A = 50 bar and the pressure B = 70 bar.

[0009] Furthermore, the oil inlet valve and / or air inlet valve are solenoid valves, controlled by the substation controller. The substation controller controls the oil inlet valve and / or air inlet valve to independently cut off or connect the oil inlet pipeline and / or air inlet pipeline of the oil and gas substation.

[0010] Furthermore, it also includes intelligent monitoring for real-time collection of system data, including system pressure, liquid level, temperature, and distributor operation frequency.

[0011] This invention also discloses a cooperative control method, comprising the following steps: Step S10: The system starts up, with the hydraulic master station running first to establish system oil pressure; Step S20: The oil and gas substation operates independently, and the operation is carried out according to its preset working procedure. The procedure includes setting the working cycle, number of working times and interval time based on the total oil consumption and working conditions of the lubrication points under the jurisdiction of the oil and gas substation. Step S30: Perform oil-gas mixing and delivery. Open the oil inlet valve and the air inlet valve. The progressive distributor performs precise distribution according to the settings. The distributed lubricating oil mixes with the compressed air output from the air source in the oil-gas mixing block to form an oil-gas flow that is delivered to the lubrication point.

[0012] Furthermore, when a certain oil and gas branch station or its managed lubrication points require maintenance or malfunction, the oil inlet valve and air inlet valve of the corresponding oil and gas branch station can be closed separately to achieve fault isolation.

[0013] In summary, the present invention has the following beneficial effects: Revolutionary reliability improvements: Through a distributed architecture and independent control of substations, "fault isolation" is achieved, and single-point maintenance does not require a complete production shutdown, greatly improving equipment availability and production continuity; Lubrication precision and energy efficiency optimization: "On-demand lubrication" is achieved, which can accurately distribute the amount of oil according to the temperature and load of different areas, ensuring lubrication in high-temperature areas while avoiding waste in low-temperature areas, extending bearing life and saving lubricating oil consumption; Significantly improved maintenance efficiency: Modular design combined with comprehensive monitoring functions enables faster fault location, more convenient maintenance work, and a significant reduction in overall maintenance costs; Aligned with the trend of intelligentization: The system architecture naturally supports data acquisition and remote control, and can be seamlessly integrated into the factory's intelligent manufacturing system, providing a data foundation for predictive maintenance and refined energy management. Attached Figure Description

[0014] To more clearly illustrate the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure of a distributed oil-air lubrication system for a steel rolling hub area according to the present invention; Figure 2 yes Figure 1 Schematic diagram of the hydraulic master station section; Figure 3 yes Figure 1 A schematic diagram of the structure of the Sinopec gas substation.

[0016] In the diagram, 1 is the hydraulic main station; 11 is the gear pump; 2 is the air source; 3 is the oil-gas substation; 31 is the oil inlet pipeline; 32 is the air inlet pipeline; 33 is the oil inlet valve; 34 is the air inlet valve; 35 is the progressive distributor; and 36 is the oil-gas mixing block. Detailed Implementation

[0017] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings. These embodiments do not constitute a limitation of the present invention. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this application.

[0018] A distributed oil-air lubrication system for the steel rolling hub area, such as Figure 1 As shown, the system includes a hydraulic master station 1, an air source 2, and an intelligent monitoring system for real-time data collection. The collected system data includes system pressure, liquid level, temperature, and distributor operation frequency, enabling operational status monitoring, fault warning, and remote start / stop. A Siemens S7-1200 series or similar main control PLC can be used to connect to the master station controller and each substation controller for global monitoring. The hydraulic master station 1 and air source 2 are connected to several oil and gas substations 3 via branch lines. Each oil and gas substation 3 corresponds to a different area of ​​the rolling mill hub. The rolling mill hub area is divided according to the operating temperature, with one oil and gas substation 3 corresponding to one operating temperature range.

[0019] like Figure 2As shown, the hydraulic master station 1 includes an oil tank, a pump set, a high-pressure filter, an accumulator, and a master station controller. The pump set includes at least two gear pumps 11, one in use and one on standby, connected in parallel between the oil tank and the output oil circuit. The master station controller controls the pump set to start when the pressure is lower than the preset pressure A and to stop when the preset pressure B is reached (in this embodiment, pressure A = 50 bar and pressure B = 70 bar). The system oil pressure of the output oil circuit is maintained in a stable range of 50-70 bar through coordinated control by the accumulator and pressure relay.

[0020] like Figure 3 As shown, each oil and gas substation 3 is an independent control unit, including a substation controller, an oil inlet pipe 31 and an air inlet pipe 32 connected to the hydraulic main station 1 and the air source 2 respectively. Each substation controller can be independently programmed to set its unique working / interval cycle. The oil inlet pipe 31 and the air inlet pipe 32 are respectively equipped with an oil inlet valve 33 and an air inlet valve 34 for controlling their opening and closing. The oil inlet pipe 31 is connected to a progressive distributor 35. The oil inlet pipe 31 is equipped with an air source 2 processing device for filtration, etc. The progressive distributor 35 and the air inlet pipe 32 are connected to an oil and gas mixing block 36. The output end of the oil and gas mixing block 36 is connected to each lubrication point in the corresponding area. The oil inlet valve 33 and the air inlet valve 34 are solenoid valves, controlled by the substation controller. The substation controller controls the oil inlet valve 33 and the air inlet valve 34 to independently cut off or connect the oil inlet pipeline 31 and the air inlet pipeline 32 of the oil and gas substation 3. In this embodiment, the oil inlet valve 33 and the air inlet valve 34 are set as a pair, one is a solenoid valve and the other is a manual valve, so as to realize electric cut-off and manual cut-off. The operating status of each oil and gas substation 3 is independent of that of other oil and gas substation 3. Any oil and gas substation 3 can be shut down, repaired, or have its parameters adjusted without affecting the normal operation of other oil and gas substation 3. This allows the system to achieve precise on-demand lubrication based on the actual working conditions of different areas such as hub A area, hub B area, and brake.

[0021] This invention also discloses a cooperative control method, comprising the following steps: Step S10: The system starts up, with hydraulic master station 1 running first to establish a system oil pressure of 50-70 bar; Step S20: Oil and gas substation 3 operates independently, and the operation is carried out according to its preset working program. The program includes setting the working cycle, number of working times and interval time based on the total oil consumption and working conditions (such as temperature) of the lubrication points under the jurisdiction of oil and gas substation 3. In step S30, oil-gas mixing and transportation are carried out. The substation controller controls the opening of the oil inlet valve 33 and the air inlet valve 34. The progressive distributor 35 performs precise distribution according to the setting. The distributed lubricating oil is mixed with the treated compressed air in the oil-gas mixing block 36 to form an oil-gas flow that is transported to the lubrication point. Finally, fault isolation and handling are carried out: when a certain oil and gas substation 3 or its managed lubrication point needs maintenance or malfunctions, the oil inlet valve 33 and air inlet valve 34 of the corresponding oil and gas substation 3 are closed individually through the substation controller or main control PLC to achieve fault isolation; the substation stops working, while the other substations continue to operate normally to ensure uninterrupted production.

[0022] This embodiment is applied to the No. 3 bar turning hub area of ​​Zhongtian Steel. The system includes one modified hydraulic main station 1 and four newly added oil and gas substations 3. The hydraulic main station 1 provides a stable high-pressure oil source for the system. Its pump set starts when the oil pressure is below 50 bar and stops when it reaches 70 bar. Four oil and gas substations 3 are responsible for four areas from the brake to the end of the drum (the zones are determined according to the operating temperature). Each oil and gas substation 3 is set with a different operating frequency in the substation controller according to the total number of lubrication points it is responsible for and the theoretical oil consumption (e.g., the first substation is responsible for 56 lubrication points with an oil consumption of 196 ml / h, which is higher than the fourth substation is responsible for 84 lubrication points with an oil consumption of 183 ml / h). When the fourth substation responsible for the end of the drum needs maintenance, the operator can shut it down remotely or locally. At this time, the first, second, and third substations at the front end are completely unaffected and continue to provide lubrication to the rolling line.

[0023] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art can make various modifications or equivalent substitutions to the present invention within the scope of its essence and protection. Such modifications or equivalent substitutions should also be considered to fall within the protection scope of the present invention.

Claims

1. A distributed oil-air lubrication system for the rolling mill hub area, characterized in that: It includes a hydraulic master station and an air source, which are connected to several oil and gas substations, each corresponding to a different area of ​​the rolling mill hub. Each oil and gas substation includes an oil inlet pipeline and an air inlet pipeline connected to the hydraulic master station and the air source, respectively. The oil inlet pipeline and the air inlet pipeline are respectively equipped with an oil inlet valve and an air inlet valve for controlling their opening and closing. The oil inlet pipeline is connected to a progressive distributor, and the progressive distributor and the air inlet pipeline are connected to an oil-gas mixing block. The output end of the oil-gas mixing block is connected to each lubrication point in the corresponding area.

2. The distributed oil-air lubrication system for the steel rolling hub area according to claim 1, characterized in that: The rolling mill hub area is divided according to the operating temperature, with one oil and gas substation corresponding to one operating temperature range.

3. A distributed oil-air lubrication system for a steel rolling mill hub area according to claim 1 or 2, characterized in that: The hydraulic master station includes a pump set, which includes at least two gear pumps, one in use and one on standby.

4. A distributed oil-air lubrication system for a steel rolling mill hub area according to claim 1 or 2, characterized in that: The pump unit starts when the pressure is below the preset pressure A and stops when the preset pressure B is reached.

5. A distributed oil-air lubrication system for a steel rolling mill hub area according to claim 4, characterized in that: The pressure A = 50 bar, and the pressure B = 70 bar.

6. A distributed oil-air lubrication system for a steel rolling mill hub area according to claim 1, characterized in that: The oil inlet valve and / or air inlet valve are solenoid valves, controlled by the substation controller. The substation controller controls the oil inlet valve and / or air inlet valve to independently cut off or connect the oil inlet pipeline and / or air inlet pipeline of the oil and gas substation.

7. A distributed oil-air lubrication system for a steel rolling mill hub area according to claim 1 or 6, characterized in that: It also includes intelligent monitoring for real-time collection of system data, including system pressure, liquid level, temperature, and distributor operation frequency.

8. A collaborative control method, based on the distributed oil-air lubrication system for the rolling mill hub area as described in claim 1, characterized in that: Includes the following steps, Step S10: The system starts up, with the hydraulic master station running first to establish system oil pressure; Step S20: The oil and gas substation operates independently, and the operation is carried out according to its preset working procedure. The procedure includes setting the working cycle, number of working times and interval time based on the total oil consumption and working conditions of the lubrication points under the jurisdiction of the oil and gas substation. Step S30: Perform oil-gas mixing and delivery. Open the oil inlet valve and the air inlet valve. The progressive distributor performs precise distribution according to the settings. The distributed lubricating oil mixes with the compressed air output from the air source in the oil-gas mixing block to form an oil-gas flow that is delivered to the lubrication point.

9. The collaborative control method according to claim 8, characterized in that: When a certain oil and gas branch station or its managed lubrication points require maintenance or malfunction, the oil inlet valve and air inlet valve of the corresponding oil and gas branch station are closed separately to isolate the fault.

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