Hydraulic oil storage device for cold shears

Abstract

The utility model discloses a cold shearing machine hydraulic oil storage device, including oil tank and oil transfer pump, oil transfer pump is connected oil tank through first pipeline, and the oil outlet end of oil transfer pump is connected with three -way valve, still be connected with second pipeline on the oil tank, the oil outlet of one of three -way valves is connected second pipeline through third pipeline, and the oil outlet of the other side of three -way valve is connected cold shearing machine hydraulic oil circuit through fourth pipeline. Compared with prior art, the utility model can drive the internal circulation of oil through oil transfer pump before oil change, and the deposited impurities are agitated, and because the impurities follow the circulating flow of hydraulic oil, the impurities will be discharged with the hydraulic oil, avoid the impurities to stay in the oil tank and follow the subsequent new hydraulic oil to enter the hydraulic system of cold shearing machine, and only need to install a third pipeline and three -way valve on the original design oil transfer pipeline, and can realize, and the cost is low, and the transformation is simple.

Description

Technical Field

[0001] This utility model relates to the field of cold shear machine technology, and in particular to a hydraulic oil storage device for a cold shear machine. Background Technology

[0002] Cold shearing machines are key equipment in the metal processing industry for cutting steel to length. Their power transmission relies heavily on a hydraulic system, and the cleanliness of the hydraulic oil, as the transmission medium, directly determines the service life of hydraulic components and the operational stability of the cold shearing machine. The hydraulic oil storage device, as the "oil center" of the cold shearing machine's hydraulic system, primarily undertakes the functions of storing, circulating, and recovering hydraulic oil. It typically consists of an oil tank, an oil pump, and matching oil pipelines, and is a fundamental component ensuring the continuous and efficient operation of the cold shearing machine. The existing hydraulic oil storage device for cold shearing machines is designed primarily to meet conventional oil supply needs. Its basic structure is as follows: an oil pump draws hydraulic oil from the tank via an inlet pipe, delivers it to the cold shearing machine's hydraulic circuit via an outlet pipe, and the returned oil flows back to the tank via a return pipe, forming a closed-loop oil supply cycle. Some devices incorporate simple filters in the oil supply lines to reduce oil impurities and filter out some suspended impurities generated during the circulation process. However, in actual use, the long-term circulation of hydraulic oil will produce impurities such as metal particles and aging and detached debris from hydraulic components due to wear of hydraulic components. When the operation stops, these impurities are easily deposited at the bottom of the oil tank due to gravity. When changing the oil in the existing storage device, only the corresponding valve is opened to drain the old oil, but the impurities deposited at the bottom of the oil tank are difficult to drain with the oil flow. After adding new hydraulic oil to the oil tank, the residual impurities will quickly mix into the new oil and re-enter the hydraulic system of the cold shear machine with the oil circulation. This not only easily clogs precision components such as throttle valves and nozzles, but also aggravates the wear of components such as hydraulic pumps and cylinders, resulting in unstable hydraulic system pressure and frequent failures, which seriously affects the normal operating efficiency and service life of the cold shear machine. Utility Model Content

[0003] The main purpose of this utility model is to provide a hydraulic oil storage device for a cold shearing machine. Before changing the oil, the oil can be circulated internally by an oil pump to agitate the deposited impurities. Since the impurities flow with the hydraulic oil circulation, they will be discharged along with the hydraulic oil, preventing impurities from remaining in the oil tank and entering the hydraulic system of the cold shearing machine with the newly added hydraulic oil. This can be achieved simply by adding a third pipe and a three-way valve to the original oil supply line, which is low in cost and easy to modify.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A hydraulic oil storage device for a cold shearing machine includes an oil tank and an oil pump. The oil pump is connected to the oil tank through a first pipe. A three-way valve is connected to the oil outlet of the oil pump. A second pipe is also connected to the oil tank. One of the oil outlets of the three-way valve is connected to the second pipe through a third pipe. The other oil outlet of the three-way valve is connected to the hydraulic oil circuit of the cold shearing machine through a fourth pipe.

[0005] Furthermore, a first filter screen is fixed inside the oil tank, the oil inlet of the first pipe is located at the top of the first filter screen, and the oil outlet of the second pipe is located at the bottom of the first filter screen.

[0006] Furthermore, the oil tank is also equipped with an oil inlet pipe, which has several oil inlet holes. The oil inlet pipe is located above the first filter screen, and the first pipe is connected to the oil inlet pipe.

[0007] Furthermore, a first valve is installed on the second pipeline, and a second valve is installed on the third pipeline.

[0008] Furthermore, a pressure gauge is installed on the fourth pipe.

[0009] Furthermore, a sixth pipe is connected to the oil tank, the oil inlet of the sixth pipe is located above the first filter screen, a third valve is installed on the sixth pipe, and a second filter screen is installed inside the sixth pipe.

[0010] Furthermore, the oil tank is also equipped with a fifth pipe, the oil outlet of which is located below the first filter screen and a fourth valve is installed on the fifth pipe.

[0011] Compared with the prior art, the present invention has the following beneficial effects: Before changing the oil, this invention uses an oil pump to drive the internal circulation of the oil, agitating the deposited impurities. Since the impurities flow with the hydraulic oil circulation, they are discharged along with the hydraulic oil, preventing them from remaining in the oil tank and entering the hydraulic system of the cold shear machine with the newly added hydraulic oil. This ensures the normal operating efficiency and service life of the cold shear machine. Moreover, this solution only requires the addition of a third pipe and a three-way valve to the existing oil pipeline, making it low-cost and easy to modify.

[0012] In this invention, the return oil from the cold shear machine flows through the second pipe to the area below the first filter screen. It needs to be filtered by the filter screen before entering the clean oil zone, ensuring that the hydraulic oil delivered to the cold shear machine is always clean.

[0013] The three-way valve of this invention enables convenient switching of the oil circuit. When changing the oil, it is only necessary to adjust the three-way valve to close the fourth pipe, open the third pipe, and close the first valve to start the internal circulation, without disassembling complex components. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of a hydraulic oil storage device for a cold shearing machine according to the present invention.

[0015] Figure 2 This is a schematic cross-sectional view of the oil tank structure of a hydraulic oil storage device for a cold shearing machine according to this utility model.

[0016] Figure 3 This is a side view of the oil tank of a hydraulic oil storage device for a cold shearing machine according to the present invention.

[0017] In the diagram: 1. Oil tank; 2. Third pipe; 3. Second valve; 4. Second pipe; 5. First valve; 6. Sixth pipe; 7. Fifth pipe; 8. Oil pump; 9. Three-way valve; 10. Fourth pipe; 11. Pressure gauge; 12. First filter screen; 13. First pipe; 14. Oil inlet pipe; 16. Second filter screen; 17. Third valve; 18. Fourth valve. Detailed Implementation

[0018] The present invention will now be described in detail with reference to the accompanying drawings.

[0019] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0020] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0021] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0022] like Figure 1-3 As shown, a hydraulic oil storage device for a cold shearing machine includes an oil tank 1 and an oil pump 8. The oil pump 8 is connected to the oil tank 1 through a first pipe 13. A three-way valve 9 is connected to the oil outlet of the oil pump 8. A second pipe 4 is also connected to the oil tank 1. One of the oil outlets of the three-way valve 9 is connected to the second pipe 4 through a third pipe 2. The other oil outlet of the three-way valve 9 is connected to the hydraulic oil circuit of the cold shearing machine through a fourth pipe 10. A fifth pipe 7 is also provided on the oil tank 1. The oil outlet of the fifth pipe 7 is located below the first filter screen 12, and a fourth valve 18 is provided on the fifth pipe 7.

[0023] In this embodiment, hydraulic oil is stored in the oil tank 1. When hydraulic oil is supplied to the hydraulic shears of the cold shear machine, the three-way valve 9 can open the fourth pipe 10. Therefore, when the oil pump 8 is working, it can deliver hydraulic oil to the hydraulic shear oil circuit of the cold shear machine through the fourth pipe 10 for cold shearing. The hydraulic shear return oil circuit of the cold shear machine is connected to the second pipe 4, so the hydraulic oil can flow back to the oil tank 1 through the second pipe 4 to achieve circulating oil supply.

[0024] When the hydraulic oil in tank 1 needs to be replaced, the operator can change the oil circuit through the three-way valve 9, thereby closing the fourth pipe 10 and opening the third pipe 2. In this state, the oil pump 8 can deliver the hydraulic oil in tank 1 to the third pipe 2, and finally return to tank 1 through the second pipe 4, so that the hydraulic oil circulates inside tank 1. This allows impurities in the hydraulic oil to circulate with the hydraulic oil, preventing impurities from settling. After the hydraulic oil has circulated for a certain period of time (e.g., 30 minutes), the oil pump 8 is turned off and the fourth valve 18 is opened, so that the hydraulic oil is discharged through the fifth pipe 7. Since the impurities circulate with the hydraulic oil, they will be discharged along with the hydraulic oil, preventing impurities from remaining in tank 1 and entering the hydraulic system of the cold shear machine with the newly added hydraulic oil. This prevents impurities from clogging the precision components of the hydraulic system, such as throttle valves, nozzles, and filters.

[0025] Among them, such as Figure 2As shown, a first filter screen 12 is fixed inside the oil tank 1. The oil inlet of the first pipe 13 is located at the top of the first filter screen 12, and the oil outlet of the second pipe 4 is located at the bottom of the first filter screen 12. When the oil pump 8 is working, the hydraulic oil in the oil tank 1 is drawn out through the first pipe 13. Since the oil inlet of the first pipe 13 is located at the top of the first filter screen 12 and the oil outlet of the second pipe 4 is located at the bottom of the first filter screen 12, the returning hydraulic oil will return to the bottom of the first filter screen 12 through the second pipe 4. The hydraulic oil at the top of the first filter screen 12 is filtered by the first filter screen 12. Therefore, impurities in the hydraulic oil entering the hydraulic oil circuit of the cold shear machine can be reduced. Moreover, the first filter screen 12 can make impurities concentrate at the bottom of the oil tank 1.

[0026] There is a certain space between the first filter screen 12 and the bottom wall of the oil tank 1.

[0027] The oil inlet of the first pipe 13 is located at the top of the first filter screen 12, and the oil outlet of the second pipe 4 is located at the bottom of the first filter screen 12. There is a height difference, so when the hydraulic oil is circulated in the oil tank 1 by the oil pump 8, the hydraulic oil can fully participate and stir up the deposited impurities.

[0028] Among them, such as Figure 2 As shown, an oil inlet pipe 14 is also provided in the oil tank 1. Several oil inlet holes are opened on the oil inlet pipe 14. The oil inlet pipe 14 is located above the first filter screen 12. The first pipe 13 is connected to the oil inlet pipe 14. When the oil pump 8 is working, the hydraulic oil in the oil tank 1 can enter the oil inlet pipe through several oil inlet holes. Therefore, the oil pump 8 draws hydraulic oil at relatively dispersed positions, which further improves the efficiency of hydraulic oil circulation.

[0029] Among them, such as Figure 1 As shown, a first valve 5 is installed on the second pipe 4, and a second valve 3 is installed on the third pipe 2. When the hydraulic oil is circulating, the first valve 5 should be closed so that the hydraulic oil entering the second pipe 4 from the third pipe 2 can directly enter the oil tank 1, preventing this part of the hydraulic oil from flowing into the return oil line of the cold shear machine through the second pipe 4.

[0030] Among them, such as Figure 1 As shown, a pressure gauge 11 is installed on the fourth pipeline 10, and personnel can know the oil transmission pressure of the fourth pipeline 10 through the pressure gauge 11.

[0031] Among them, such as Figure 1 and Figure 2As shown, a sixth pipe 6 is also connected to the oil tank 1. The oil inlet of the sixth pipe 6 is located above the first filter screen 12. A third valve 17 is installed on the sixth pipe 6, and a second filter screen 16 is installed inside the sixth pipe 6. When new hydraulic oil is injected into the oil tank 1, the personnel can open the third valve 17 and inject hydraulic oil into the oil tank 1 through the sixth pipe 6. The second filter screen 16 can filter out any impurities that may be present in the newly added hydraulic oil, ensuring that no additional impurities enter the oil tank 1 when new hydraulic oil is added.

[0032] Working principle: During normal operation of the cold shear machine, the oil pump 8 draws clean oil through the oil inlet pipe 14 with multiple oil inlet holes above the first filter screen 12, and supplies it to the cold shear machine through the three-way valve 9 and the fourth pipe 10. The return oil flows through the second pipe 4 to the area below the first filter screen 12 in the oil tank 1. When the oil needs to be changed, the three-way valve 9 is adjusted to close the fourth pipe 10 and open the third pipe 2. The first valve 5 on the second pipe 4 is closed, which causes the oil pump 8 to drive the oil to circulate and agitate the impurities at the bottom of the oil tank 1. Then, the fifth pipe 7 is opened to discharge the old oil containing impurities. When injecting new oil, the fourth valve 18 is closed and the third valve 17 on the sixth pipe 6 is opened. The new oil is filtered by the second filter screen 16 and enters the clean area above the first filter screen 12. Impurities are intercepted throughout the process by the second filter screen 16, ensuring the cleanliness of the hydraulic oil and the stability of the hydraulic system of the cold shear machine.

[0033] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent transformations or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A hydraulic oil storage device for a cold shearing machine, comprising an oil tank (1) and an oil pump (8), wherein the oil pump (8) is connected to the oil tank (1) via a first pipe (13), characterized in that: The oil pump (8) is connected to a three-way valve (9) at its outlet. The oil tank (1) is also connected to a second pipe (4). One of the outlets of the three-way valve (9) is connected to the second pipe (4) through a third pipe (2). The other outlet of the three-way valve (9) is connected to the hydraulic circuit of the cold shear machine through a fourth pipe (10). The oil tank (1) is also equipped with a fifth pipe (7). The fifth pipe (7) is equipped with a fourth valve (18).

2. The hydraulic oil storage device for a cold shear machine according to claim 1, characterized in that: The oil tank (1) is fixed with a first filter screen (12), the oil inlet of the first pipe (13) is located at the top of the first filter screen (12), and the oil outlet of the second pipe (4) is located at the bottom of the first filter screen (12).

3. The hydraulic oil storage device for a cold shear machine according to claim 2, characterized in that: The oil tank (1) is also provided with an oil inlet pipe (14), which has several oil inlet holes. The oil inlet pipe (14) is located above the first filter screen (12), and the first pipe (13) is connected to the oil inlet pipe (14).

4. The hydraulic oil storage device for a cold shear machine according to claim 1, characterized in that: The second pipe (4) is provided with a first valve (5), and the third pipe (2) is provided with a second valve (3).

5. A hydraulic oil storage device for a cold shear machine according to claim 1, characterized in that: A pressure gauge (11) is installed on the fourth pipe (10).

6. A hydraulic oil storage device for a cold shearing machine according to any one of claims 2-5, characterized in that: The oil tank (1) is also connected to a sixth pipe (6), the oil inlet of the sixth pipe (6) is located above the first filter screen (12), the sixth pipe (6) is equipped with a third valve (17), and the sixth pipe (6) is equipped with a second filter screen (16).

7. A hydraulic oil storage device for a cold shearing machine according to claim 6, characterized in that: The oil outlet of the fifth pipe (7) is located below the first filter screen (12).

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