Oil supply system for a high-pressure pump station of a hot rolling mill

Abstract

The utility model provides a kind of oil supply system of hot rolling mill high-pressure pump station, it is related to non-ferrous metal processing field.The utility model's oil supply system is made of multiple pump groups, among them, part pump group has an oil outlet P1, the rest pump group has an oil outlet P2, oil outlet P1 is used to supply oil to heavy shear and vertical roll equipment, oil outlet P2 is used to supply oil to press on and bending roll equipment.Unidirectional valve is arranged between oil outlet P2 and oil outlet P1, when the oil supply of press on equipment and bending roll equipment is insufficient, oil outlet P1 supplies oil to oil outlet P2 by unidirectional valve, meets the oil supply requirement of press on equipment and bending roll equipment.When oil outlet P1 appears oil pressure fluctuation due to the action of heavy shear equipment and vertical roll equipment, unidirectional valve can isolate the oil pressure fluctuation of oil outlet P1, avoid that pressure fluctuation influences the movement accuracy of press on and bending roll, causes the problem of strip thickness out-of-tolerance and plate shape not ideal.This oil supply system meets the action requirement of each equipment, and saves the input cost of high-pressure pump station.

Description

Technical Field

[0001] This utility model specifically relates to an oil supply system for a high-pressure pump station of a hot rolling mill, and pertains to the field of non-ferrous metal processing technology. Background Technology

[0002] High-pressure pump stations are important auxiliary equipment for hot rolling mills. With the increasing requirements for the quality of aluminum sheets and strips, the hot rolling mill is required to have high motion precision during the production process. In particular, the operation of the hot rolling mill should not be affected by pressure changes in the high-pressure pump station.

[0003] like Figure 1 As shown, the high-pressure pump station of a certain enterprise's hot rolling mill consists of five pump groups (1.1-1.5), each with a single oil outlet P1, supplying oil to the pressing, bending, heavy shearing, and vertical rolling equipment respectively. Due to the large oil output of the heavy shearing and vertical rolling equipment, the pressure at outlet P1 drops instantaneously and then fluctuates significantly when these equipment operates, severely affecting the movement accuracy of the pressing and bending rolls and easily causing problems such as excessive strip thickness and undesirable strip shape. To solve this problem, many non-ferrous metal processing enterprises have established two pump stations: one supplying oil to the pressing and bending rolls, and the other to the heavy shearing and vertical rolling equipment. While this approach solves the problem, it also significantly increases costs. Therefore, the issue of stable oil supply from the high-pressure pump station needs to be reconsidered. Utility Model Content

[0004] To overcome the shortcomings of the prior art, this utility model discloses an oil supply system for a high-pressure pump station of a hot rolling mill, adopting the following technical solution: An oil supply system for a high-pressure pump station of a hot rolling mill, used to supply oil to the pressing, bending, heavy shearing, and vertical rolling equipment, is characterized in that: the oil supply system consists of multiple pump groups, wherein some pump groups have an oil outlet P1, and the remaining pump groups have an oil outlet P2. Oil outlet P1 is used to supply oil to the heavy shearing and vertical rolling equipment, and oil outlet P2 is used to supply oil to the pressing and bending equipment. A one-way valve is provided between oil outlet P2 and oil outlet P1. The one-way valve is used for unidirectional oil supply from oil outlet P1 to oil outlet P2 and to isolate oil pressure fluctuations at oil outlet P1.

[0005] Further improved technical solution: The oil supply system consists of five pump groups, of which three pump groups have one oil outlet P1 and the other two pump groups have one oil outlet P2.

[0006] Further improved technical solution: The oil supply system consists of six pump sets, of which five pump sets have one oil outlet P1 and the remaining pump set has one oil outlet P2.

[0007] Further improve the technical solution: one of the five pump sets is a standby pump set, which is connected to the oil outlet P2 via a solenoid valve.

[0008] Further improve the technical solution: A pressure regulating valve is installed at the oil outlet P1.

[0009] Further improve the technical solution: A pressure regulating valve is installed at the oil outlet P2.

[0010] After implementing the above technical solution, the beneficial effects of this utility model compared to the prior art are: The oil supply system of this invention consists of multiple pump sets. Some pump sets supply oil to the shearing and vertical roller equipment through oil outlet P1, while the remaining pump sets supply oil to the shearing and vertical roller equipment through oil outlet P2. Oil outlets P1 and P2 are relatively independent but connected by a check valve. When the oil supply to the pressing and bending equipment is insufficient, oil outlet P1 supplies oil to oil outlet P2 through the check valve to meet the oil supply requirements of the pressing and bending equipment. When oil pressure fluctuations occur at oil outlet P1 due to the operation of the shearing and vertical roller equipment, the check valve can isolate the oil pressure fluctuations at oil outlet P1, preventing pressure fluctuations from affecting the movement accuracy of the pressing and bending rollers, thus avoiding problems such as excessive strip thickness and unsatisfactory strip shape.

[0011] Based on existing technology, this utility model achieves oil supply for both high-flow-rate and low-flow-rate high-precision actuating equipment by adding pump sets and check valves, which not only meets the actuating requirements of each device but also saves the investment cost of high-pressure pump stations. Attached Figure Description

[0012] Appendix Figure 1 The diagram shows a schematic of the oil supply system of the existing hot rolling mill high-pressure pump station.

[0013] Appendix Figure 2 The diagram shown is a schematic of the oil supply system of the high-pressure pump station of this hot rolling mill. Detailed Implementation

[0014] The preferred embodiments of this utility model are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of this utility model and are not intended to limit the scope of protection of this utility model. It should be noted that in the description of this utility model, terms such as "front," "rear," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. This is merely for ease of description and does not indicate or imply that the device or element must have a specific orientation and positional relationship, and therefore should not be construed as a limitation of this utility model. It should also be noted that in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a mechanical connection or an electrical connection; it can refer to a direct connection or an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0015] An oil supply system for a high-pressure pump station of a hot rolling mill, relating to the field of non-ferrous metal processing technology, is mainly used to solve the problem in the prior art where pressure fluctuations affect the motion accuracy of the pressing and bending rolls, resulting in excessive thickness and unsatisfactory strip shape.

[0016] A hot rolling mill is a complete set of equipment, including a shearing unit, a vertical rolling unit, a pressing unit, and a bending unit. The pressing and bending units are involved in the rolling of aluminum strip, while the shearing and vertical rolling units are unrelated to rolling. The shearing and vertical rolling units may operate at any time during the rolling process, causing fluctuations in hydraulic pressure. Depending on the equipment's operational needs, the shearing and vertical rolling units require a high-pressure pump station to provide a large flow of hydraulic pressure when operating. While the pressing and bending units do not require a large flow of hydraulic pressure, stable hydraulic pressure must be maintained to ensure high motion accuracy and guarantee the rolling quality of the aluminum strip.

[0017] See attached document Figure 2In this embodiment, the oil supply system of the high-pressure pump station mainly consists of six pump sets: pump set 1.1, pump set 1.2, pump set 1.4, pump set 1.5, and pump set 1.6. Pump sets 1.1, 1.2, 1.4, and 1.5 each have an oil outlet P1, which is connected to the heavy shear valve and the vertical roll valve respectively, for supplying oil to the heavy shearing equipment and the vertical roll equipment. Pump set 1.6 has an oil outlet P2, which is connected to the pressing valve and the bending roll valve respectively, for supplying oil to the pressing equipment and the bending roll equipment. Thus, the heavy shearing equipment and the vertical roll equipment are supplied with oil by five pump sets, meeting their high-flow-rate oil supply requirements; the pressing equipment and the bending roll equipment are supplied with oil by one pump set, independently meeting their oil supply requirements.

[0018] In addition, a one-way valve is installed between oil outlet P2 and oil outlet P1. The one-way valve is used for unidirectional oil supply from oil outlet P1 to oil outlet P2 and to isolate oil pressure fluctuations at oil outlet P1. When the oil supply of the pressing equipment and bending equipment is insufficient, oil outlet P1 supplies oil to oil outlet P2 through one-way valve 2.7 to meet the oil supply requirements of the pressing equipment and bending equipment. When oil pressure fluctuations occur at oil outlet P1 due to the operation of the heavy shearing equipment and vertical roller equipment, since the oil pressure at oil outlet P1 is usually lower than that at oil outlet P2, the one-way valve can isolate the oil pressure fluctuations at oil outlet P1, preventing pressure fluctuations from affecting the motion accuracy of the pressing and bending rollers, and causing problems such as excessive strip thickness and unsatisfactory strip shape.

[0019] To cope with emergencies, pump set 1.5 is selected as the standby pump set among the five pump sets connected to oil outlet P1. Standby pump set 1.5 is connected to oil outlet P2 via solenoid valve 3.7. When the oil supply to the pressing equipment and bending equipment is insufficient, solenoid valve 3.7 is opened, and standby pump set 1.5 participates in supplying oil to the pressing equipment and bending equipment.

[0020] To further stabilize the oil pressure, a pressure regulating valve (not shown in the figure) is installed at the oil outlet P1 and at the oil outlet P2 (not shown in the figure).

[0021] It should be understood that the oil supply system of a high-pressure pump station is not limited to six pump sets. For example, the oil supply system can also consist of five pump sets, where three pump sets have one oil outlet P1, which is used to supply oil to the heavy shearing equipment and the vertical roll equipment. The remaining two pump sets have one oil outlet P2, which is used to supply oil to the pressing equipment and the bending roll equipment.

[0022] It is worth noting that the content not described in detail in the above embodiments is prior art. It is also worth noting that any additions, subtractions, substitutions, and improvements made by those skilled in the art based on the structure and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An oil supply system for a high-pressure pump station of a hot rolling mill, used to supply oil to the pressing, bending, heavy shearing, and vertical rolling equipment, characterized in that: The oil supply system consists of multiple pump sets, some of which have an oil outlet P1 and the rest have an oil outlet P2. Oil outlet P1 is used to supply oil to the heavy shearing and vertical roll equipment, and oil outlet P2 is used to supply oil to the pressing and bending roll equipment. A one-way valve is installed between oil outlet P2 and oil outlet P1. The one-way valve is used to supply oil from oil outlet P1 to oil outlet P2 in one direction and to isolate oil pressure fluctuations at oil outlet P1.

2. The oil supply system for a high-pressure pump station of a hot rolling mill as described in claim 1, characterized in that: The oil supply system consists of five pump sets, of which three pump sets have one oil outlet P1 and the other two pump sets have one oil outlet P2.

3. The oil supply system for a high-pressure pump station of a hot rolling mill as described in claim 1, characterized in that: The oil supply system consists of six pump sets, of which five pump sets have one oil outlet P1 and the remaining pump set has one oil outlet P2.

4. The oil supply system for a high-pressure pump station of a hot rolling mill as described in claim 3, characterized in that: One of the five pump sets is a standby pump set, which is connected to the oil outlet P2 via a solenoid valve.

5. The oil supply system for a high-pressure pump station of a hot rolling mill as described in claim 1, characterized in that: A pressure regulating valve is installed at the oil outlet P1.

6. The oil supply system for a high-pressure pump station of a hot rolling mill as described in claim 1, characterized in that: A pressure regulating valve is installed at the oil outlet P2.

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