阅读说明：本技术 一种提升5m轧机机架辊润滑系统使用可靠性的方法 (Method for improving use reliability of 5M rolling mill stand roller lubricating system ) 是由 黄崇辉 于 2021-07-30 设计创作，主要内容包括：本发明公开了一种提升5M轧机机架辊润滑系统使用可靠性的方法,其特征在于,对轧机机架辊润滑系统管路进行改造,将原管路一路主管分4路支管分别给4个机架辊用户点进行润滑、最终4路支管汇总到主管回到油箱、仅主管上设置压力监测,改成4个机架辊用户点分别设置独立的回路进行润滑,回路之间互不影响,每路回路单独设置流量计及压力传感器,实现对4个机架辊用户点润滑压力、流量进行实时监测。本发明有效避免了机架辊轴承润滑不良、润滑不均,提高了机架辊使用寿命。(The invention discloses a method for improving the use reliability of a lubrication system of a 5M rolling mill stand roller, which is characterized in that a pipeline of the lubrication system of the rolling mill stand roller is reformed, one main pipeline of an original pipeline is divided into 4 branch pipelines which are respectively used for lubricating 4 stand roller user points, finally the 4 branch pipelines are gathered to the main pipeline and returned to an oil tank, only the main pipeline is provided with pressure monitoring, the 4 stand roller user points are respectively provided with independent loops for lubricating, the loops are not mutually influenced, each loop is independently provided with a flowmeter and a pressure sensor, and the lubricating pressure and the flow of the 4 stand roller user points are monitored in real time. The invention effectively avoids poor and uneven lubrication of the roller bearing of the frame and prolongs the service life of the roller of the frame.)

1. The utility model provides a method for promoting 5M rolling mill housing roll lubricating system reliability of using, its characterized in that, reform transform rolling mill housing roll lubricating system pipeline, divide 4 branch pipes to lubricate 4 housing roll user points respectively with former pipeline main pipe all the way, 4 branch pipes are finally gathered to the main pipe and are got back to the oil tank, only be responsible for and set up pressure monitoring, change 4 housing roll user points into and set up independent return circuit respectively and lubricate, each other does not influence between the return circuit, every return circuit sets up flowmeter and pressure sensor alone, realize carrying out real-time supervision to 4 housing roll user point lubricating pressure, flow.

2. The method of improving reliability of use of a 5M roll mill housing roll lubrication system of claim 1, comprising the steps of:

(1) an energy storage oil storage pipe is added on the oil outlet main pipe of the frame roller lubricating system;

(2) uniformly forming 4 holes above the energy storage oil storage pipe, respectively forming 4 branch oil outlet pipes by butt welding stainless steel pipes, and mounting a flowmeter on each branch oil outlet pipe;

(3) respectively connecting 4 rack roller user points to an outlet piping of each flowmeter to serve as oil inlet pipes of the 4 rack roller user points, and respectively mounting pressure sensors on the 4 oil inlet pipes;

(4) and oil return positions of user points of 4 frame rollers are respectively matched with an oil return pipe to be connected with an oil return tank.

3. The method for improving the reliability of the use of a 5M rolling mill housing roll lubricating system according to claim 2, wherein the tail end of each 4-path oil return pipe is divided by 60 degrees for observing the oil return lubrication condition of each path.

4. The method of improving the reliability of use of a 5M roll mill housing roll lubrication system of claim 2 wherein said accumulator reservoir pipe is of DN150 gauge.

5. The method for improving the use reliability of the lubrication system of the 5M rolling mill stand roller according to claim 2, wherein the lowest point of the blind plate of the energy storage oil storage pipe is provided with a drain outlet for periodically cleaning impurities in the energy storage oil storage pipe.

6. The method of improving the reliability of use of a 5M mill housing roll lubrication system of claim 2 wherein said 4 holes are 25mm in diameter and said stainless steel tube is 38mm in diameter.

7. The method for improving the reliability of the use of a lubrication system of a 5M rolling mill stand roller according to claim 1, wherein a flow meter and a pressure sensor are connected to a control system of the lubrication system of the rolling mill stand roller, when the flow rate of a certain path of the stand roller is lower than the set value of the flow meter or the pressure of the certain path of the stand roller is lower than the set value of the pressure sensor, the control system gives an alarm, and when the alarm time exceeds the set time and is not processed, the lubrication system of the rolling mill stand roller stops running.

8. The method for improving the reliability of use of a 5M rolling mill shell roll lubrication system according to any one of claims 1 to 7 wherein said 4 shell roll user points comprise mill entrance operation side shell rolls, entrance drive side shell rolls, exit operation side shell rolls, exit drive side shell rolls.

Technical Field

The invention relates to a rolling mill system in a wide and thick plate factory, in particular to a lubricating system of a rolling mill stand roller.

Background

The 5M rolling mill in the wide and thick plate factory is generally a single stand, the rolling variety is various, and the thick plate is rolled and transported to the inlet and outlet of the rolling mill through a steel rotating roller way and a stand roller for rolling. The inlet housing rolls are built into the mill housing on the mill inlet side and the outlet housing rolls are built into the mill housing on the mill outlet side, which are functionally identical to the turn-table roll stands but do not turn the steel. Because of the lack of space, the frame rollers are driven by a single motor for one roller, and the other two rollers are driven by two motors arranged in tandem through a speed change mechanism. The internal bearings of the 5M rolling mill stand rollers in the wide and thick plate factory are lubricated by thin oil, one main pipe of a lubricating system is directly divided into four paths for supplying to the inlet stand roller and the outlet stand roller for lubrication, and finally the main pipe is collected to a main pipe return system, and only one main pipe is provided with a pressure sensor for pressure monitoring. In 5 months in 2020, the 5M rolling mill in a certain wide and thick plate factory has uncontrollable lubrication points of the outlet frame roller, poor lubrication, burning of the outlet frame roller bearing, and shutdown of the rolling line for 26 hours due to accidents, which causes great economic loss.

Disclosure of Invention

In order to improve the running stability of the 5M wide and thick plate rolling mill stand roller and improve the reliability of thin oil lubrication, the invention provides a method for improving the use reliability of a 5M rolling mill stand roller lubrication system, and the method is also suitable for improving the reliability of thin oil lubrication of large-scale mechanical equipment.

The invention specifically adopts the following technical scheme:

the utility model provides a method for promoting 5M rolling mill housing roll lubricating system reliability of using, its characterized in that, reform transform rolling mill housing roll lubricating system pipeline, divide 4 branch pipes to lubricate 4 housing roll user points respectively with former pipeline main pipe all the way, 4 branch pipes are finally gathered to the main pipe and are got back to the oil tank, only be responsible for and set up pressure monitoring, change 4 housing roll user points into and set up independent return circuit respectively and lubricate, each other does not influence between the return circuit, every return circuit sets up flowmeter and pressure sensor alone, realize carrying out real-time supervision to 4 housing roll user point lubricating pressure, flow.

Preferably, the method comprises the steps of:

(1) an energy storage oil storage pipe is added on the oil outlet main pipe of the frame roller lubricating system;

(2) uniformly forming 4 holes above the energy storage oil storage pipe, respectively forming 4 branch oil outlet pipes by butt welding stainless steel pipes, and mounting a flowmeter on each branch oil outlet pipe;

(3) respectively connecting 4 rack roller user points to an outlet piping of each flowmeter to serve as oil inlet pipes of the 4 rack roller user points, and respectively mounting pressure sensors on the 4 oil inlet pipes;

(4) and oil return positions of user points of 4 frame rollers are respectively matched with an oil return pipe to be connected with an oil return tank.

Has the advantages that:

1. the invention has the advantages that the pipeline of the lubricating system of the rolling mill stand roller is redesigned, the control is optimized, the manual spot inspection blind area is reduced, the lubricating condition of the user point of the stand roller is obviously improved, the oil inlet pressure and the oil inlet flow of the user point are monitored and early warned, the oil outlet condition of the oil return pipe can be inspected, the poor lubrication and the uneven lubrication of the bearing of the stand roller are effectively avoided, and the service life of the stand roller is prolonged.

2. According to the invention, the flow meter and the pressure sensor are independently arranged in each independent loop, so that the double early warning functions of the flow and the pressure of the lubricating system can be realized, the faults of the rack roller are reduced, the reliability of thin oil lubrication of the rack roller is further improved, the production cost is saved, and the annual economic benefit can reach 30 ten thousand yuan.

3. Taking the frame roller as an example that the oil inlet flow of the frame roller meets the design requirement of 2L/min, the flow of each oil inlet pipe of the modified frame roller can reach 5L/min, the pressure can reach 2bar, which is greater than 0.8bar of the existing lubricating system pipeline, the output flow and the pressure after modification are stable, the fluctuation is not higher than 1.5%, and the poor lubricating condition of the frame roller is obviously improved.

Drawings

FIG. 1 is a schematic view of an energy storage reserve pipe;

FIG. 2 is a schematic view of a lubrication circuit for a roll of a stand;

fig. 3 is a layout diagram of the oil return pipe of the frame roller oil return tank in the oil tank.

Detailed Description

The embodiment provides a method for improving the use reliability of a 5M rolling mill housing roll lubricating system, a structure of four outlets and one return of an original lubricating system pipeline is cancelled, the structure is changed into four inlets and four outlets, namely, the mechanical structure of the housing roll and the lubricating system of the housing roll are analyzed, the problems of the original lubricating system are analyzed, the pipeline of the rolling mill housing roll lubricating system is transformed, one main pipe of the original pipeline is divided into 4 branch pipes for respectively lubricating 4 housing roll user points, finally the 4 branch pipes are gathered to a main pipe and returned to an oil tank, only the main pipe is provided with pressure monitoring, the 4 housing roll user points are changed into 4 housing roll user points which are respectively provided with independent loops for lubricating, the loops are not influenced mutually, each loop is independently provided with a flow meter and a pressure sensor, and the lubricating pressure and the flow of the 4 housing roll user points are monitored in real time.

The method specifically comprises the following steps:

(1) a small energy storage oil storage pipe with the length of about 1 meter DN150 is added to the main oil outlet pipe of the frame roller lubricating system and is used for stabilizing the pressure of the main pipe and distributing the flow of the branch pipes; meanwhile, a drain outlet is formed at the lowest point of the energy storage oil outlet pipe blind plate, so that sundries in the energy storage oil storage pipe can be cleaned regularly;

(2) as shown in fig. 1, 4 holes with a diameter of 25mm are uniformly formed above the oil storage pipe along the length direction, the holes are respectively welded by using a phi 38mm stainless steel pipe with a length of 500mm in a butt welding manner, and an SCY type DN25 elliptic tooth flow meter is arranged on the oil outlet pipe of each branch pipe and is used for monitoring the oil outlet flow of the four branch pipes;

(3) as shown in fig. 2, the outlets of the flow meters are respectively provided with pipes and connected to the user points of the rack roller, and the oil pipes are used as oil inlet pipes of 4 user points, wherein one path of the oil pipes is used for feeding oil to the operation side rack roller of the inlet, the other path of the oil pipes is used for feeding oil to the transmission side rack roller of the inlet, the other path of the oil pipes is used for feeding oil to the operation side rack roller of the outlet, and the other path of the oil pipes is used for feeding oil to the transmission side rack roller of the outlet. A pressure sensor with a connector G1/4 is arranged at a position 1 m above the flowmeter on each oil inlet pipe and is used for monitoring the oil outlet pressure of the four branch pipes;

(4) an oil return pipe is respectively matched at oil return positions of four user points (namely an inlet operation side, an inlet transmission side, an outlet operation side and an outlet transmission side) of the machine frame roller, an oil return tank is connected, and 60-degree subdivision is carried out on the tail ends of the four oil return pipes, so that the oil return lubrication condition of each path can be observed conveniently.

(6) The flow meter and the pressure sensor of the frame roller are connected into a control system of a frame lubricating system, when the flow of a certain path of the frame roller is lower than the set value of the flow meter or the pressure is lower than the set value of the pressure sensor, the control system gives an alarm, the alarm can be reset on site, and when the alarm time is longer than 2 hours, the frame roller lubricating system stops running.

The embodiment increases the energy storage oil storage pipe of big pipe diameter on the lubricated oil main pipe that produces of frame roller for frame roller lubricating system is responsible for the stability of output pressure, flow, produces oil pipe evenly distributed little pipe diameter's in the energy storage, is favorable to the evenly distributed of producing oil, and the energy storage oil storage pipe has also acted as the function of energy storage ware simultaneously, has reduced the pressure interference of external factors such as oil temperature, frame roller rotational speed.

The elliptical tooth flow meter and the pressure sensor are additionally arranged at each oil inlet of the frame roller, so that the lubricating oil inlet of the frame roller is monitored, and the risk of insufficient oil inlet amount of the frame roller is avoided.

As shown in fig. 3, in this embodiment, a 60-degree oblique angle is formed at the end of the oil return, and the observation surface is also used as a judgment for whether the lubricating oil return of the frame roller is smooth or not, and the oil return temperature of the frame roller can be detected, so that the bearings at four points of the frame roller can be accurately judged, and the bearing abnormality at a certain point can be conveniently found in time.