Water-based lubricating liquid circulating rolling supply device for hot rolling experiment rolling mill

Abstract

The utility model discloses a water-based lubricating liquid circulating rolling supply device for a hot rolling experiment rolling mill. The water-based lubricating liquid circulating rolling supply device comprises a lubricating liquid circulating supply device, a lubricating liquid spraying device, a lubricating liquid filtering device and a lubricating system monitoring device, wherein the lubricating liquid circulating supply device is mainly responsible for the functions of storing, boosting, depressurizing, overflowing and the like of lubricating liquid in a lubricating system; the lubricating liquid spraying device can flexibly adjust the spraying angle of the lubricating liquid through a universal joint, and controls the spraying time sequence of the lubricating liquid through an electromagnetic valve; the lubricating liquid filtering device can filter and settle impurities in the rolled lubricating liquid; the lubricating liquid system monitoring device can monitor the liquid level, the temperature, the injection pressure and the flow of the lubricating liquid. According to the device, mixing and conveying of the water-based lubricating liquid can be achieved only through one set of pipeline, double-side process lubrication can be flexibly conducted on reversible rolling, and the use requirement of the water-based lubricating liquid for circulating rolling can be met.

Description

Technical Field

[0001] The utility model belongs to the technical field of metallurgical equipment and relates to a water-based lubricating liquid circulating rolling supply device for a hot rolling experimental rolling mill. Background Art

[0002] Rolling process lubrication is to spray lubricating liquid into the rolling deformation roll gap area to form a lubricating film between the rolled product and the roll, improve the rolling interface characteristics, thereby reducing the rolling force and rolling current, and achieve the purpose of improving the rolling mill capacity, reducing roll consumption and improving the surface quality of the rolled product. At present, rolling process lubrication technology has been widely used in cold-rolled and hot-rolled steel production.

[0003] At present, the rolling lubricant commonly used in hot rolling is a lubricant formed by mixing rolling oil and clean circulating water in the nozzle. Due to the high viscosity of rolling oil, it is sensitive to temperature and is easy to clog the nozzle when the ambient temperature is low. It is also easy to smoke and small flames in high temperature and extreme pressure environments. In addition, the lubricant after rolling and the iron oxide particles are easy to form sludge, which is difficult to handle in an environmentally friendly manner. Therefore, the upgrade of rolling lubricant is also imperative.

[0004] Water-based lubricant is a new type of rolling lubricant. It is easily soluble in water and has good polarization properties and anti-friction and anti-wear properties. It is gradually used in the production of hot-rolled heavy rails. However, it is still used once and has not been recycled. In order not to affect normal production and reduce costs, the feasibility evaluation of the circulation hot rolling use of water-based lubricants can be completed on the hot rolling test mill. For this purpose, a water-based lubricant circulation supply system for the hot rolling test mill needs to be designed.

[0005] Patent CN211839586U discloses a wide-band stainless steel surface lubrication rolling device, including a base, a waste liquid recovery tank, a rolling mill, and a lubricating and cooling mechanism. A waste liquid recovery tank is provided on one side of the base, a rolling mill is provided on one side of the waste liquid recovery tank, and a lubricating and cooling mechanism is provided on one side of the rolling mill. The utility model sprays lubricating liquid evenly onto the rollers through an oil mist nozzle. The large amount of heat generated during the rolling process can evaporate the water, so that the oil mist forms a layer of vaporized oil film on the surface of the roller to separate the roller from the strip, so as to effectively reduce the friction between the roller and the strip, reduce the loss of the roller, and reduce the friction in the process of the roller rolling the strip, thereby achieving the purpose of reducing the rolling force, reducing the load of the rolling mill, ensuring the stable operation of the rolling mill and improving the surface quality of the strip.

[0006] Patent ZL200820187956.7 discloses a lubricating rolling spray system for hot-rolled steel strip, including a spray header, a nozzle and a water cut-off plate; one end of the spray header is connected to the outlet of the mixed liquid, and the other end is provided with a nozzle, and the water cut-off plate is divided into an upper water cut-off plate and a lower water cut-off plate, and is characterized in that the spray header is two and is located between the upper water cut-off plate and the lower water cut-off plate, the spray header includes a circular tubular main header connected to the outlet of the mixed liquid and a jet header with a rectangular cross section connected to the main header, a row of nozzles with sufficient oil-water overlap is arranged on the jet header, and the spray header is fixed to the water cut-off plate through a header fixing frame. The spray header of the system device is firmly fixed, has good anti-collision performance, is not easy to deform, can form a uniform oil film on the roller surface, and solves the problem of nozzle clogging.

[0007] Patent ZL200720153078.2 discloses a friction lubrication rolling guide device, including upper and lower guide brackets installed at the entrance of the upper and lower working rolls of the rolling mill, the ends of the two guide brackets close to the two working rolls are respectively connected to the support plates, and a gap is left between the surface of the support plate facing the working roll and the roll surface of the working roll, and the surfaces of the two support plates are respectively provided with grooves, and the grooves are filled with solid lubricant blocks in contact with the work roll surface, and the top surfaces of the two support plates are respectively covered with wiping pads, and one end of the two wiping pads is in contact with the roll surface of the two working rolls. The utility model is not only simple in structure, easy to manufacture, and low in investment, but also can effectively reduce the wear degree of the work roll surface and reduce production costs.

[0008] The lubrication device designed in the above patent is for hot rolling mills used in production, while the hot rolling experimental mill has its own characteristics and flexible operation features. Therefore, it is necessary to combine the characteristics of water-based lubricants and the characteristics of hot rolling experimental mills to innovate the design of the lubrication device to meet the experimental needs of multi-function, convenient adjustment and flexible control. Utility Model Content

[0009] In order to solve the above problems, the technical solution adopted by the utility model is: a water-based lubricating liquid circulating rolling supply device for a hot rolling experimental rolling mill, including a lubricating liquid circulating supply device, a lubricating liquid spraying device, a lubricating liquid filtering device and a lubricating system monitoring device;

[0010] The lubricating liquid circulation supply device comprises a lubricating liquid storage box, a lifting pump, a pressure reducing valve, a centrifugal pump, a relief valve, a first ball valve and a second ball valve;

[0011] The lubricating liquid filtering device comprises a first filter, a second filter, a collecting box and a collecting tank;

[0012] The lubrication system monitoring device includes a pressure gauge, a thermometer, a flow meter and a liquid level gauge;

[0013] The lubricating liquid injection device comprises a first electromagnetic switch valve, a second electromagnetic switch valve and a first nozzle group, a second nozzle group, a third nozzle group and a fourth nozzle group;

[0014] The liquid level meter is arranged on the outside of the lubricating liquid storage box;

[0015] The thermometer is arranged inside the lubricating liquid storage box;

[0016] The filter is arranged at the bottom of the lubricating liquid storage box, one end of the first filter is connected to one end of the first ball valve, the other end of the first ball valve is connected to one end of the centrifugal pump, the other end of the centrifugal pump is connected to one end of the pressure gauge and one end of the overflow valve, the other end of the overflow valve is connected to the lubricating liquid storage box, the other end of the pressure gauge is connected to one end of the second ball valve, the other end of the second ball valve is connected to one end of the pressure reducing valve, the other end of the pressure reducing valve is connected to one end of the flow meter, the other end of the flow meter is connected to one end of the first electromagnetic switch and one end of the second electromagnetic switch, the other end of the first electromagnetic switch is connected to the first nozzle group and the second nozzle group; the other end of the second electromagnetic switch is connected to the third nozzle group and the fourth nozzle group;

[0017] The collecting tank is arranged below the hot rolling experimental rolling mill;

[0018] The second filter is disposed inside the collection box;

[0019] The output end of the collecting tank is connected to the input end of the collecting box, and a lifting pump is arranged between the output end of the second filter and the lubricating liquid storage box.

[0020] Further: the first nozzle group, the second nozzle group, the third nozzle group and the fourth nozzle group are respectively arranged on the first upper working roll spraying beam, the first lower working roll spraying beam, the second upper working roll spraying beam and the first lower working roll spraying beam.

[0021] Furthermore: the first nozzle group, the second nozzle group, the third nozzle group and the fourth nozzle group have the same structure, the first nozzle group includes 4 nozzles, the 4 nozzles are evenly arranged, and the nozzles use a universal joint to adjust the spray angle.

[0022] Furthermore: the lubricating liquid storage box and the lubricating liquid collecting box are an upper and lower integrated structure.

[0023] Furthermore: a drainage hole is provided at the bottom of the collection box, and the opening and closing is controlled by a ball valve.

[0024] Furthermore, the lubricating liquid storage box and the bottom of the collecting box are separated by partitions of a certain height.

[0025] Furthermore: a liquid level gauge and a thermometer are installed on the outer surface of the lubricating liquid storage box.

[0026] Furthermore: heat insulation cotton is added to the mill side pipeline system for supplying liquid to each group of nozzles.

[0027] Furthermore, ball valves are arranged between the pressure pump and the synovial fluid storage box, between the collection box and the lifting pump, and between the collection tank and the collection box.

[0028] Furthermore: the nozzle is a fan-shaped nozzle.

[0029] The utility model provides a water-based lubricating liquid circulating rolling supply device for a hot rolling experimental rolling mill, which has the following advantages:

[0030] (1) Double-sided roll gap lubrication can be achieved on the hot rolling experimental rolling mill to meet the process lubrication requirements of reversible rolling. Fixed single-sided lubrication rolling can also be achieved, and the lubrication method is more flexible.

[0031] (2) Due to the property of water-based lubricants being easily soluble in water, separate oil supply lines and water supply lines are not required, nor is an oil-water mixer required. The lubrication system piping layout is simpler, and there is no possibility of water-based lubricants clogging the pipes and nozzles. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the utility model 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 some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0033] Figure 1 It is the structural principle diagram of the device;

[0034] Figure 2 It is the nozzle arrangement diagram;

[0035] Figure numerals: 1. Lubricating liquid storage box; 2. Liquid level meter; 3. Lifting pump; 4.1~4.5. Ball valve; 5. Centrifugal pump; 6.1. First ball valve, 6.2. Second ball valve; 7. Filter; 8. Pressure reducing valve; 9. Pressure gauge; 10. Electronic turbine flowmeter; 11.1. First electromagnetic switch valve, 11.2. Second electromagnetic switch valve; 12. Overflow valve; 13.1~13.16. Fan nozzle; 14.1~14.16. Universal joint; 15.1. Upper working roll spray beam; 15.2. Lower working roll spray beam; 15.3. Upper working roll spray beam; 15.4. Lower working roll spray beam; 16. Collecting box; 17. Collecting tank; 18. Thermometer. DETAILED DESCRIPTION

[0036] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0037] 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 will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. 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.

[0038] Figure 1 It is the structural principle diagram of the device;

[0039] A water-based lubricating liquid circulating rolling supply device for a hot rolling experimental rolling mill comprises a lubricating liquid circulating supply device, a lubricating liquid spraying device, a lubricating liquid filtering device and a lubricating system monitoring device;

[0040] The lubricating liquid circulation supply device comprises a lubricating liquid storage box 1, a lifting pump 3, a pressure reducing valve 8, a centrifugal pump 5, an overflow valve 12, a first ball valve 6.1 and a second ball valve 6.2; and is responsible for the storage, transmission, pressure reduction, overflow and other functions of the lubricating liquid in the lubrication system;

[0041] The lubricating liquid filtering device comprises a first filter 7, a second filter, a collecting box 16 and a collecting tank 17; it is mainly used to filter and settle impurities in the circulation process of the lubricating liquid;

[0042] The lubrication system monitoring device comprises a pressure gauge, a thermometer 18, a flow meter and a liquid level meter 2; and monitors the injection pressure, flow, liquid level and temperature of the lubricating liquid.

[0043] The lubricating liquid injection device comprises a first electromagnetic switch valve 11.1, a second electromagnetic switch valve 11.2 and a first nozzle group, a second nozzle group, a third nozzle group and a fourth nozzle group; the lubricating liquid injection angle can be flexibly adjusted to realize the lubricating liquid injection timing control according to the lubrication process requirements;

[0044] The liquid level meter 2 is arranged on the outside of the lubricating liquid storage box 1;

[0045] The thermometer 18 is arranged inside the lubricating liquid storage box 1;

[0046] The first filter 7 is arranged at the bottom of the lubricating liquid storage box 1, one end of the first filter 7 is connected to one end of the first ball valve 6.1, the other end of the first ball valve 6.1 is connected to one end of the centrifugal pump 5, the other end of the centrifugal pump 5 is connected to one end of the pressure gauge and one end of the overflow valve 12, the other end of the overflow valve 12 is connected to the lubricating liquid storage box 1, the other end of the pressure gauge is connected to one end of the second ball valve 6.2, the other end of the second ball valve 6.2 is connected to one end of the pressure reducing valve, the other end of the pressure reducing valve is connected to one end of the flow meter 10, the other end of the flow meter 10 is connected to one end of the first electromagnetic switch 11.1 and one end of the second electromagnetic switch 11.2, the other end of the first electromagnetic switch 11.1 is connected to the first nozzle group and the second nozzle group; the other end of the second electromagnetic switch 11.2 is connected to the third nozzle group and the fourth nozzle group; the first ball valve 6.1 and the second ball valve 6.2 are DN32; the flow meter is an electronic turbine flow meter

[0047] The collecting tank 17 is arranged below the hot rolling experimental rolling mill, and can collect the remaining lubricating liquid after lubrication rolling, and automatically return it to the collecting box 16 by gravity.

[0048] The second filter is arranged inside the collection box 16;

[0049] The output end of the collecting tank 17 is connected to the input end of the collecting box 16 , and a lift pump 3 is provided between the output end of the second filter and the lubricating liquid storage box 1 .

[0050] The lubricating liquid flowing out of the lubricating liquid storage tank enters the circulation supply pipeline under the action of the centrifugal pump 5, and returns to the lubricating liquid storage tank through the pipeline overflow valve 12. This is the internal circulation. When the nozzle solenoid valve is opened, it will also enter the nozzle and be sprayed onto the surface of the working roll. The injection flow rate can be monitored by the flow meter on the pipeline. During lubrication rolling, internal and external circulation modes coexist.

[0051] The first nozzle group, the second nozzle group, the third nozzle group and the fourth nozzle group are respectively arranged on the first upper working roll spray beam 15.1 (rolling entrance end), the first lower working roll spray beam 15.2 (rolling exit end), the second upper working roll spray beam 15.3 (rolling entrance end) and the first lower working roll spray beam 15.4 (rolling exit end).

[0052] The first nozzle group, the second nozzle group, the third nozzle group and the fourth nozzle group have the same structure. The first nozzle group, the second nozzle group, the third nozzle group and the fourth nozzle group include 16 fan-shaped nozzles 13.1 to 13.16 in total. The 16 fan-shaped nozzles are controlled by 16 universal joints 14.1 to 14.16 respectively.

[0053] The first group of nozzles includes 4 nozzles, which are evenly arranged. The nozzles use universal joints to adjust the spray angle to ensure that the spray fan can be staggered on a horizontal line and close to the roll gap area. Add heat insulation cotton to the mill side pipeline system for each group of nozzles to isolate the high temperature of hot rolling and protect the pipeline system. The upper and lower groups of nozzles on the inlet side and the upper and lower groups of nozzles on the outlet side are independently controlled by an electromagnetic switch valve, which can realize single-sided lubrication, reversible double-sided lubrication, and can also realize injection timing control according to rolling requirements. When the nozzle solenoid valve is closed, the water-based lubricant and clean circulating water added to the lubricating liquid storage tank can be mixed by internal circulation, making full use of the water-soluble property of water-based lubricants.

[0054] The lubricating liquid storage box 1 and the lubricating liquid collecting box 16 are an upper and lower integrated structure.

[0055] The bottom of the collecting box 16 is provided with a drain hole, which is opened and closed by a ball valve.

[0056] The bottom of the lubricating liquid storage box 1 is divided by a partition of a certain height. One side is used to store the refluxed lubricating liquid and naturally settle, and the other side is used to store the overflow liquid passing through the partition, and then flows out of the box as new lubricating liquid through the secondary filter at the bottom. The height of the partition is 100mm.

[0057] The bottom of the lubricating liquid storage box 1 is partitioned by a partition of a certain height. In the lubricating liquid collecting box 16, there is a first filter to roughly filter impurities, and the filtered lubricating liquid flows back to the lubricating liquid storage box through the lifting pump 3.

[0058] The outer surface of the lubricating liquid storage box 1 is provided with a level gauge and a thermometer, which can monitor the volume and temperature of the lubricating liquid. In addition, a sampling hole is also provided, which is opened and closed by a manual valve.

[0059] Ball valves 4.1 to 4.5 are provided between the pressure pump and the synovial fluid storage box, between the collecting box 16 and the lifting pump 3, and between the collecting tank 17 and the collecting box 16, and the ball valves 4.1 to 4.5 are DN25.

[0060] The working principle of the lubricating liquid circulation supply device of the present invention is as follows:

[0061] The filtered lubricating liquid is pressurized by a centrifugal pump 5 and sent to the pipeline. A pressure reducing valve 8, a pressure gauge, and a flow meter are arranged on the pipeline. The opening and closing of the upper and lower nozzles on the rolling inlet side are controlled by an electromagnetic switch valve. During the rolling process, the lubricating liquid sprayed onto the surface of the roller is brought into the roller gap area by the rotating roller. Under the high temperature and extreme pressure in the rolling deformation zone, the lubricating liquid plays a lubricating role, separates the rolled piece from the roller, and reduces the rolling friction coefficient. The remaining lubricating liquid flows back to the collection tank 17 and the collection box 16, and then enters the lubricating liquid storage box through the lifting pump 3. The box contains a partition to achieve natural sedimentation. During the rolling process, part of the lubricating liquid in the pipeline will also flow back to the lubricating liquid storage box through the overflow valve 12. In addition, sampling ports and drainage ports are also opened outside the lubricating liquid storage box and the collection box 16 to facilitate sampling of the lubricating liquid and discharge of the sediment.

[0062] Nozzle arrangement as shown in the attached Figure 2 As shown, a row of nozzles are arranged on the rolling inlet and outlet sides, and on the upper and lower sides. A universal joint is used to adjust the spray angle to ensure that the spray fan can be staggered on a horizontal line and close to the roll gap area.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A hot rolling experimental rolling mill circulating rolling supply device using a water-based lubricating liquid, characterized in that: It includes a lubricating liquid circulation supply device, a lubricating liquid injection device, a lubricating liquid filtering device and a lubricating system monitoring device; The lubricating liquid circulation supply device comprises a lubricating liquid storage box, a lifting pump, a pressure reducing valve, a centrifugal pump, a relief valve, a first ball valve and a second ball valve; The lubricating liquid filtering device comprises a first filter, a second filter, a collecting box and a collecting tank; The lubrication system monitoring device includes a pressure gauge, a thermometer, a flow meter and a liquid level gauge; The lubricating liquid injection device comprises a first electromagnetic switch valve, a second electromagnetic switch valve and a first nozzle group, a second nozzle group, a third nozzle group and a fourth nozzle group; The liquid level gauge is arranged on the outside of the lubricating liquid storage box; The thermometer is arranged inside the lubricating liquid storage box; The filter is arranged at the bottom of the lubricating liquid storage box, one end of the first filter is connected to one end of the first ball valve, the other end of the first ball valve is connected to one end of the centrifugal pump, the other end of the centrifugal pump is connected to one end of the pressure gauge and one end of the overflow valve, the other end of the overflow valve is connected to the lubricating liquid storage box, the other end of the pressure gauge is connected to one end of the second ball valve, the other end of the second ball valve is connected to one end of the pressure reducing valve, the other end of the pressure reducing valve is connected to one end of the flow meter, the other end of the flow meter is connected to one end of the first electromagnetic switch and one end of the second electromagnetic switch, the other end of the first electromagnetic switch is connected to the first nozzle group and the second nozzle group; the other end of the second electromagnetic switch is connected to the third nozzle group and the fourth nozzle group; The collecting tank is arranged below the hot rolling experimental rolling mill; The second filter is disposed inside the collection box; The output end of the collecting tank is connected to the input end of the collecting box, and a lifting pump is arranged between the output end of the second filter and the lubricating liquid storage box.

2. The hot rolling test mill water-based lubricating liquid circulating rolling supply device according to claim 1 is characterized in that: The first nozzle group, the second nozzle group, the third nozzle group and the fourth nozzle group are respectively arranged on the first upper working roll spraying beam, the first lower working roll spraying beam, the second upper working roll spraying beam and the first lower working roll spraying beam.

3. The hot rolling test mill water-based lubricating liquid circulating rolling supply device according to claim 2 is characterized in that: The first nozzle group, the second nozzle group, the third nozzle group and the fourth nozzle group have the same structure. The first nozzle group includes 4 nozzles, which are evenly arranged. The nozzles use universal joints to adjust the spray angle.

4. The hot rolling test mill water-based lubricating liquid circulating rolling supply device according to claim 1 is characterized in that: The lubricating liquid storage box and the lubricating liquid collecting box are an upper and lower integrated structure.

5. The hot rolling test mill water-based lubricating liquid circulating rolling supply device according to claim 1, characterized in that: A drainage hole is provided at the bottom of the collection box, and the opening and closing is controlled by a ball valve.

6. The hot rolling test mill water-based lubricating liquid circulating rolling supply device according to claim 1, characterized in that: The lubricating liquid storage box body and the bottom of the collecting box are respectively partitioned by partitions of a certain height.

7. The hot rolling test mill water-based lubricating liquid circulating rolling supply device according to claim 1 is characterized in that: A liquid level gauge and a thermometer are installed on the outer surface of the lubricating liquid storage box.

8. The hot rolling test mill water-based lubricating liquid circulating rolling supply device according to claim 1 is characterized in that: Add thermal insulation wool to the mill side piping system that supplies fluid to each group of nozzles.

9. The hot rolling experimental rolling mill water-based lubricating liquid circulating rolling supply device according to claim 1, characterized in that: Ball valves are arranged between the pressure gauge and the synovial fluid storage box, between the collecting box and the lifting pump, and between the collecting tank and the collecting box.

10. The hot rolling test mill water-based lubricating liquid circulating rolling supply device according to claim 1, characterized in that: The nozzle is a fan-shaped nozzle.

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