Pit cold saw lubrication station of steel rolling mill

Abstract

The utility model discloses a pit cold saw lubrication station of a steel mill, which belongs to the technical field of lubrication stations and comprises an oil tank arranged in the lubrication station, an oil pump group used for conveying lubricating oil and enabling the lubricating oil to flow circularly, a cooler used for cooling the lubricating oil and a valve arranged on a circulating pipeline. An external heating oil tank is arranged at the top of the lubrication station and connected with the oil tank, and a three-way valve is arranged on a channel for connecting the external heating oil tank and the oil tank and connected with the cooler. The pit cold saw lubrication station is convenient to maintain, the whole pit cold saw lubrication station does not need to be lifted out to maintain the heater, only the outer heating oil tank needs to be detached, replaced and maintained, and use of the pit cold saw lubrication station is not affected; and circulating temperature rise can be conveniently carried out in advance when sawing is stopped for a long time, so that internal mechanical parts such as bevel gears and bearings are in a heat preservation state for a long time.

Description

Technical Field

[0001] The utility model belongs to the technical field of lubrication stations, and in particular relates to a cold saw lubrication station in a pit of a steel rolling mill. Background Art

[0002] The cold saw lubrication station in the steel mill is a system used to provide lubrication services for the cold saw machine. The cold saw machine is an important equipment used to cut steel in the steel mill. Due to its high temperature and high pressure working environment and the great friction between the blade and the steel, an effective lubrication system is needed to reduce wear, extend blade life, reduce energy consumption and improve cutting quality.

[0003] A pit cold saw lubrication station is a commonly used method. The lubrication station is located in a pit below the ground. The lubricating oil used in some lubrication stations supporting heavy equipment is of higher grade and has a higher viscosity. When the temperature drops, the viscosity of the lubricating oil in the oil tank of the lubrication station increases sharply, which makes the fluidity of the lubricating oil worse, increases the flow resistance, reduces the suction capacity of the oil pump, and increases the back pressure of the lubrication system, resulting in a significant reduction in the amount of oil output by the lubricating oil pump to the lubrication point. In order to ensure the normal operation of the lubrication system under low temperature conditions, the lubrication station generally uses a heating device to heat the lubricating oil in the oil tank of the lubrication station to reduce the viscosity of the lubricating oil and meet the use requirements. The current heating method is to set a heater in the oil tank to heat the entire tank of oil in the tank to a suitable temperature to meet normal working requirements.

[0004] When the heater is used for a long time, the heater tube is easy to break down, resulting in increased spare parts consumption, abnormal oil leakage and high loss, and high risk factor of electric control, which affects the normal use of equipment heating. When it is repaired, the oil tank must be removed and lifted out to replace the heater in the pit cold saw lubrication station, which is labor-intensive and affects the use. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a cold saw lubrication station for a steel rolling mill pit, which can facilitate maintenance and improve the efficiency of the lubrication station.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A cold saw lubrication station in a steel rolling mill pit comprises an oil tank arranged in the lubrication station, an oil pump group for conveying lubricating oil for its circulation, a cooler for cooling the lubricating oil and a valve arranged on the circulation pipeline, an external heating oil tank connected to the oil tank is arranged on the top of the lubrication station, and a three-way valve connected to the cooler is arranged on a passage connecting the external heating oil tank and the oil tank.

[0008] A further improvement of the technical solution of the utility model is that: along the flow direction of the lubricating oil, the oil tank and the three-way valve are connected, the other two ports of the three-way valve are respectively connected to the external heating oil tank and the cooler, the external heating oil tank is connected to the connecting pipeline between the cooler and the oil tank, and a valve is provided.

[0009] A further improvement of the technical solution of the utility model is that a temperature sensor and a liquid level meter are arranged in the oil tank and the external heating oil tank.

[0010] A further improvement of the technical solution of the utility model is that a filter is arranged on the pipeline connecting the oil tank and the oil-requiring equipment.

[0011] A further improvement of the technical solution of the utility model is that: N heaters are arranged in the external heating oil tank, and N≥1.

[0012] A further improvement of the technical solution of the utility model is that the valves, three-way valves, temperature sensors, cooling water switches of the coolers and start / stop switches of the heaters arranged on the lubrication station and its pipelines are automatically controlled by a central controller PLC.

[0013] Due to the adoption of the above technical solution, the technical progress achieved by the utility model is:

[0014] The external heated oil tank and the oil tank of the lubricating oil station of the present application first heat the lubricating oil and circulate it to prevent coking of the lubricating oil caused by high heating temperature and to avoid uneven temperature of the heated lubricating oil. When the heated temperature reaches the target value, it is transported to the equipment that needs the lubricating oil. At the same time, the heater is arranged on the external heated oil tank, and the external heated oil tank is arranged above the lubrication station. For the pit lubrication station, there is no need to lift the lubrication station and dismantle the oil tank to repair the heater. The external heated oil tank can be directly dismantled above for repair or replacement, which saves time and effort.

[0015] The underground cold saw lubrication station of the present application can also circulate and heat up in advance when the sawing is stopped for a long time. The ports of the external heating oil tank and the oil tank circulation in the three-way valve are closed, and oil is directly supplied to the oil-requiring equipment from the external heating oil tank, so that the internal mechanical components such as the bevel gears and bearings are kept warm for a long time. In particular, in winter, the oil temperature can be prevented from dropping too quickly when the sawing is started temporarily, resulting in blocked oil return and uncontrolled lubrication, thereby improving the lubrication efficiency of the lubrication station for the equipment and reducing the time of accidental sawing stoppages. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of a cold saw lubrication station in a steel rolling mill pit according to the utility model;

[0017] Among them, 1. Oil tank, 2. Oil pump group, 3. Cooler, 4. External heating oil tank, 5. Three-way valve, 6. Filter, 7. Liquid level meter, 8. Temperature sensor. DETAILED DESCRIPTION

[0018] The present invention is further described in detail below in conjunction with the embodiments:

[0019] like Figure 1 As shown, a lubrication station for cold saws in a steel rolling mill pit includes an oil tank 1 arranged in the lubrication station, an oil pump group 2 for conveying lubricating oil for its circulation, a cooler 3 for cooling the lubricating oil, and a valve arranged on the circulation pipeline. An external heating oil tank 4 is arranged on the top of the lubrication station and connected to the oil tank 1. Along the flow direction of the lubricating oil, the oil tank 1 is connected to one port of the three-way valve 5, and the other two ports of the three-way valve 5 are respectively connected to the external heating oil tank 4 and the cooler 3, and the external heating oil tank 4 is connected to the connecting pipeline between the cooler 3 and the oil tank 1, and a valve is arranged.

[0020] The oil tank 1 and the external heating oil tank 4 are both provided with a temperature sensor 8 and a liquid level meter 7, and the pipeline connecting the oil tank 1 and the oil-requiring equipment is provided with a filter 6. A filter is also provided on the pipeline circulating back from the outside, and multiple heaters can be provided in the external heating oil tank 4, with at least one heater provided.

[0021] The valves, three-way valve 5, temperature sensor 8, level gauge 7, start / stop switch of oil pump group 2, cooling water switch of cooler 3 and start / stop switch of heater installed on the lubrication station and its pipeline are automatically controlled by the central controller PLC.

[0022] Working principle or usage:

[0023] In normal use, the external heating oil tank and the oil tank first heat the lubricating oil and circulate it to prevent the lubricating oil from coking due to high heating temperature and to avoid uneven temperature of the heated lubricating oil. When the heated temperature reaches the target value, it is then delivered to the equipment that needs the lubricating oil. When the lubricating oil needs to be cooled in summer, the three-way valve 5 is opened to form a circulation through the cooler 3 and the oil tank 1 to cool the lubricating oil.

[0024] The heater is arranged on the external heating oil tank, and the external heating oil tank 3 is arranged above the lubrication station. For the pit lubrication station, there is no need to lift the lubrication station and dismantle the oil tank to repair the heater. The external heating oil tank can be directly dismantled above for repair or replacement, which saves time and effort.

[0025] When the oil temperature is low and the oil return is not smooth, you can only use the external heating oil tank for heating and circulation. You can also circulate and heat in advance when the saw is stopped for a long time, so that the internal mechanical parts such as the bevel gear and bearings are kept warm for a long time. Especially in winter, avoid the oil temperature dropping too fast when the saw is started temporarily, which will lead to poor oil return and uncontrolled lubrication, thereby improving the lubrication efficiency of the lubricating oil station for the equipment and reducing the unexpected downtime of the saw. It is also very convenient to repair and replace, and it can be disassembled at any time without affecting the use.

[0026] The valves, three-way valves 5, temperature sensors 8, level gauges 7, start / stop switches of the oil pump group 2, cooling water switches of the cooler 3, and start / stop switches of the heaters installed on the lubrication station and its pipelines are automatically controlled by the central controller PLC, so as to automatically start and stop the heating and lubricating oil delivery cycle according to the set temperature. If the temperature sensor 8 detects that the temperature of the lubricating oil is lower than the set value, the PLC controls the heater to start heating, and the level gauge 7 monitors the level of the lubricating oil in the oil tank and the external heating oil tank. When the level is lower than the limit value, an alarm is issued to remind the staff to refuel; various valves are uniformly controlled by the PLC, and whether the oil tank and the external heating oil tank need to be heated and circulated, and whether the heated lubricating oil needs to be directly delivered from the external heating oil tank to the oil-requiring equipment, the PLC uniformly controls the opening and closing of the valves.

Claims

1. A cold saw lubrication station in a steel rolling mill pit, comprising an oil tank (1) arranged in the lubrication station, an oil pump group (2) for conveying lubricating oil for circulation, a cooler (3) for cooling the lubricating oil, and a valve arranged on the circulation pipeline, characterized in that: An external heating oil tank (4) connected to the oil tank (1) is provided on the top of the lubrication station, and a three-way valve (5) connected to the cooler (3) is provided on a passage connecting the external heating oil tank (4) and the oil tank (1).

2. A steel rolling mill pit cold saw lubrication station according to claim 1, characterized in that: Along the flow direction of the lubricating oil, the oil tank (1) is connected to the three-way valve (5), the other two ports of the three-way valve (5) are respectively connected to the external heating oil tank (4) and the cooler (3), the external heating oil tank (4) is connected to the connecting pipeline between the cooler (3) and the oil tank (1), and a valve is provided.

3. A steel rolling mill pit cold saw lubrication station according to claim 1, characterized in that: The oil tank (1) and the external heating oil tank (4) are provided with a temperature sensor (8) and a liquid level meter (7).

4. A steel rolling mill pit cold saw lubrication station according to claim 1, characterized in that: A filter (6) is provided on the pipeline connecting the oil tank (1) and the oil-requiring equipment.

5. A rolling mill pit cold saw lubrication station according to claim 1, characterized in that: N heaters are arranged in the external heating oil tank (4), where N≥1.

6. A steel rolling mill pit cold saw lubrication station according to claim 1, characterized in that: The valves, three-way valves (5), temperature sensors (8), liquid level gauges (7), the start and stop switches of the oil pump group (2), the cooling water switches of the coolers (3), and the start and stop switches of the heaters provided on the lubrication station and its pipelines are automatically controlled by a central controller PLC.

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