A hydraulic system for a steelmaking furnace

Abstract

The utility model relates to a kind of steelmaking furnace hydraulic system and, belong to metallurgical industry steelmaking equipment technical field.The technical scheme is: under normal circumstances, hydraulic system oil circuit reaches casting hydraulic cylinder (8) by oil tank (3), hydraulic pump (1), proportional reversing valve (6), hydraulic control check valve (6), realizes the action of casting hydraulic cylinder, completes casting;If proportional reversing valve (6) fails, hydraulic system oil circuit reaches casting hydraulic cylinder (8) by oil tank (3), hydraulic pump (1), check valve (5), manual reversing valve (9), throttle valve (10), realizes emergency casting;In the emergency of system power failure, hydraulic system oil circuit reaches casting hydraulic cylinder (8) by pressure tank (13), automatic switching valve (14), manual reversing valve (9), throttle valve (10), realizes emergency casting.The beneficial effects of the utility model are: realize the emergency casting of multiple circuits, prevent casting accident caused by sudden failure.

Description

Technical Field

[0001] This utility model relates to a hydraulic system for a steelmaking furnace, belonging to the technical field of steelmaking equipment in the metallurgical industry. Background Technology

[0002] During the casting process, two control methods are generally used: motor + reducer or hydraulic system. The motor + reducer control method can generally be manually controlled and does not rely on electrical control. Manual casting can still be performed after power failure. However, the hydraulic system control method cannot be manually controlled, and the hydraulic system can only be rapidly cooled after power failure.

[0003] With technological advancements, hydraulic casting systems, boasting advantages such as high automation and strong force, are continuously expanding their application scope. Although a dual-power supply system is employed to prevent sudden power outages during smelting, casting failures cannot be completely avoided. Sudden casting failures can lead to serious equipment and personnel accidents; therefore, completely preventing casting failures has become a key technical challenge for smelting equipment controlled by hydraulic casting systems. Utility Model Content

[0004] The purpose of this invention is to provide a hydraulic system for a steelmaking furnace, which enables manual casting of the hydraulic casting system by adding a pressure tank hydraulic circuit and a manual casting circuit, thereby solving the problems existing in the background technology.

[0005] The technical solution of this utility model is:

[0006] A hydraulic system for a steelmaking furnace includes an automatic casting hydraulic circuit, a manual casting hydraulic circuit, a pressure tank hydraulic circuit, and a hydraulic pump station.

[0007] The hydraulic pump station includes a hydraulic pump, a motor, an oil tank, a safety valve, and a filter. The motor is mounted on the upper part of the oil tank, and the hydraulic pump is mounted on the motor shaft. The oil suction port of the hydraulic pump extends into the hydraulic oil in the oil tank. The filter is installed on the pressure port of the hydraulic pump, and the safety valve is installed on the pipeline branch after the filter.

[0008] The automatic casting hydraulic circuit includes a proportional directional valve and a hydraulically controlled check valve. The proportional directional valve is connected to the casting hydraulic cylinder, and the hydraulically controlled check valve is installed between the proportional directional valve and the casting hydraulic cylinder.

[0009] The manual casting hydraulic circuit includes a check valve, a manual reversing valve, and a throttle valve. The manual reversing valve is connected to the casting hydraulic cylinder for control. The throttle valve is located between the manual reversing valve and the casting hydraulic cylinder. The check valve is installed between the manual casting hydraulic circuit and the automatic hydraulic casting circuit.

[0010] The hydraulic circuit of the pressure tank includes a pressure gauge, a pressure tank, an automatic switching valve, and a manual ball valve. The pressure gauge is installed below the pressure tank, and the manual ball valve and the automatic switching valve are installed side by side, serving as a bypass valve for the automatic switching valve.

[0011] The proportional directional valve is a three-position four-way electromagnetic proportional directional valve.

[0012] The manual directional valve is a three-position four-way directional valve that is controlled and connected to the casting hydraulic cylinder.

[0013] The pressure tank is a spring-loaded pressure tank.

[0014] The automatic switching valve is a two-position, two-way electromagnetic directional valve.

[0015] Under normal circumstances, the hydraulic system oil circuit reaches the casting hydraulic cylinder through the oil tank, hydraulic pump, filter, proportional directional valve, and hydraulic check valve, thereby actuating the casting hydraulic cylinder and completing the casting process. If the proportional directional valve malfunctions, the hydraulic system oil circuit reaches the casting hydraulic cylinder through the oil tank, hydraulic pump, check valve, manual directional valve, and throttle valve for emergency casting. In the event of a power outage, the automatic switching valve automatically opens, and the hydraulic system oil circuit reaches the casting hydraulic cylinder through the pressure tank, automatic switching valve, manual directional valve, and throttle valve for emergency casting.

[0016] The beneficial effects of this utility model are: it can not only realize emergency casting in the event of a sudden power outage, but also perform normal casting when the proportional reversing valve malfunctions, thus realizing emergency casting of multiple circuits and preventing casting accidents caused by sudden failures. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the hydraulic system of this utility model;

[0018] Figure 2 This is a schematic diagram of the hydraulic system during normal casting of this utility model;

[0019] Figure 3 This is a schematic diagram of the hydraulic system for emergency casting in the event of a power outage according to this utility model.

[0020] In the diagram: 1. Hydraulic pump; 2. Motor; 3. Oil tank; 4. Safety valve; 5. Check valve; 6. Proportional directional valve; 7. Hydraulic control check valve; 8. Cast hydraulic cylinder; 9. Manual directional valve; 10. Throttle valve; 11. Pressure gauge; 12. Spring; 13. Pressure tank; 14. Automatic switching valve; 15. Manual ball valve; 16. Filter. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and examples.

[0022] See attached document Figure 1-3A hydraulic system for a steelmaking furnace includes an automatic casting hydraulic circuit, a manual casting hydraulic circuit, a pressure tank hydraulic circuit, and a hydraulic pump station;

[0023] The hydraulic pump station includes a hydraulic pump 1, a motor 2, an oil tank 3, a safety valve 4, and a filter 16. The motor 2 is installed on the upper part of the oil tank 3, and the hydraulic pump 1 is installed on the motor shaft. The oil suction port of the hydraulic pump 1 extends into the hydraulic oil in the oil tank 3. The filter 16 is installed on the pressure port of the hydraulic pump 1, and the safety valve 4 is installed on the pipeline branch after the filter 16.

[0024] The automatic casting hydraulic circuit includes a proportional directional valve 6 and a hydraulically controlled check valve 7. The proportional directional valve 6 is controlled to the casting hydraulic cylinder 8, and the hydraulically controlled check valve 7 is installed between the proportional directional valve 6 and the casting hydraulic cylinder 8.

[0025] The manual casting hydraulic circuit includes a check valve 5, a manual reversing valve 9, and a throttle valve 10. The manual reversing valve 9 is controlled and connected to the casting hydraulic cylinder 8. The throttle valve 10 is located between the manual reversing valve 9 and the casting hydraulic cylinder 8. The check valve 5 is installed between the manual casting hydraulic circuit and the automatic hydraulic casting circuit.

[0026] The hydraulic circuit of the pressure tank includes a pressure gauge 11, a pressure tank 13, an automatic switching valve 14, and a manual ball valve 15. The pressure gauge 11 is installed below the pressure tank 13. The manual ball valve 15 and the automatic switching valve 14 are installed side by side and serve as a bypass valve for the automatic switching valve 14.

[0027] In this embodiment, the hydraulic system mainly includes an automatic casting hydraulic circuit, a manual casting hydraulic circuit, a pressure tank hydraulic circuit, and a hydraulic pump station;

[0028] See attached document Figure 1 , 2 The automatic casting hydraulic circuit mainly includes a proportional directional valve 6 and a hydraulically controlled check valve 7. The proportional directional valve 6 is a three-position four-way electromagnetic proportional directional valve with automatic spring centering, which can change the direction of hydraulic oil and adjust the flow rate, thereby controlling the lifting and lowering speed and operating speed of the casting hydraulic cylinder 8. The hydraulically controlled check valve 7 is installed between the proportional directional valve 6 and the casting hydraulic cylinder 8, and its control port is connected between the proportional directional valve 6 and the hydraulic pump 1. Its main function is that when the hydraulic pump 1 is working normally, the hydraulic oil can pass smoothly through the hydraulically controlled check valve 7. When the hydraulic pump is not pressurized, it self-locks the casting hydraulic cylinder 8 to prevent the casting hydraulic cylinder 8 from falling back under gravity. In addition, it can also isolate the pressure impact of the manual casting hydraulic circuit on the proportional directional valve 7.

[0029] See attached document Figure 1 , 3The manual casting hydraulic circuit includes a manual directional valve 9, a throttle valve 10, and a check valve 5. The manual directional valve 9 is a three-position four-way directional valve with an automatic spring return mechanism. Its main function is to manually control the reversal of the hydraulic oil, thereby achieving the lifting and lowering of the casting hydraulic cylinder 8. The throttle valve 10 is located between the manual directional valve 9 and the casting hydraulic cylinder 8, regulating the flow rate of the casting hydraulic cylinder 8, thereby regulating the lifting and lowering speed of the casting hydraulic cylinder 8 in the manual control hydraulic circuit. The check valve 5 is installed between the manual casting hydraulic circuit and the automatic hydraulic casting circuit. Its main function is to prevent pressure shocks to the hydraulic pump 1 from the manual casting hydraulic circuit and the pressure tank hydraulic circuit, protecting the hydraulic pump for normal operation.

[0030] See attached document Figure 1 , 3 The hydraulic circuit of the pressure tank mainly includes a pressure tank 13, a pressure gauge 11, a manual ball valve 15, and an automatic switching valve 14. The pressure tank 13 is a spring-loaded pressure tank, which facilitates the calculation of pressure and volume changes. The pressure gauge 11 is installed below the pressure tank 13 to detect pressure changes inside the pressure tank. The automatic switching valve 14 is a two-position two-way solenoid directional valve that opens when de-energized and closes when energized. The manual ball valve 15 is installed in parallel with the automatic switching valve 14 and serves as a bypass valve for the automatic switching valve 14. When the automatic switching valve 14 fails, it can be manually opened to allow the oil in the pressure tank 13 to flow out smoothly.

[0031] See attached document Figure 1 The hydraulic pump station includes a hydraulic pump 1, a filter 16, an oil tank 3, a motor 2, and a safety valve 4. The oil tank 3 is the main structural component. The motor 2 is installed on the upper part of the oil tank 3, and the hydraulic pump 1 is installed on the motor shaft. The oil suction port of the hydraulic pump 1 extends into the hydraulic oil in the oil tank 3. The filter 16 is an oil cleaning element and is installed on the pressure port of the hydraulic pump 1. The safety valve 4 is an overflow valve and is installed on the pipeline branch after the filter 16 to adjust the output pressure of the hydraulic system.

[0032] An embodiment of this utility model is as follows:

[0033] Hydraulic Pump 1: Axial Piston Pump 80CY14-1B

[0034] Motor 2: Y2-180M-4, 22KW

[0035] Filter 3: HYDAC-160

[0036] Safety valve 4: DBTA-30 / 315G24NZ5L

[0037] One-way valve 5: S20P31B /

[0038] Proportional directional valve 6: 4WRZ16E150-30B / 24ETM

[0039] Hydraulic check valve 7: SV20PB1-30B

[0040] Hydraulic cylinder 8: φ120 / 80-1200

[0041] Manual directional valve 9: H-4WM16E10B /

[0042] Throttling valve 10: Z2FS103-30B /

[0043] Pressure gauge 11: φ80, 0-30MPa

[0044] Pressure tank 13: φ800mm*2000mm

[0045] Automatic switching valve 14: 3WE10A31B / CG24N9Z5L

[0046] Manual ball valve 15: QJH-25G

[0047] Filter 16: ZU-H-250*5BP

[0048] See attached document Figure 1 Based on the automatic casting hydraulic circuit and hydraulic pump station, a manual casting hydraulic circuit and a pressure tank hydraulic circuit are added. When the power system fails or the power source such as the hydraulic pump fails, the power for casting is provided. The power of the pressure tank is transmitted to the casting hydraulic cylinder by the manual casting hydraulic circuit, so that the hydraulic system can perform emergency casting without relying on external power.

[0049] See attached document Figure 2 Under normal circumstances, the hydraulic system oil circuit runs along the oil tank 3, hydraulic pump 1, filter 16, proportional directional valve 6, and hydraulic control check valve 7 to the casting hydraulic cylinder 8, thereby realizing the action of the casting hydraulic cylinder and completing the casting.

[0050] See attached document Figure 3 In the event of a system power failure, the automatic switching valve 14 automatically opens, and the hydraulic oil circuit reaches the casting hydraulic cylinder 8 through the pressure tank 13, the automatic switching valve 14, the manual reversing valve 9, and the throttle valve 10, thus realizing emergency casting.

[0051] In addition, if the proportional directional valve 6 suddenly malfunctions and cannot switch directions, emergency casting can also be performed through the manual directional valve 9. The hydraulic oil flows through the oil tank 3, hydraulic pump 1, check valve 5, manual directional valve 9, and throttle valve 10 to the casting hydraulic cylinder 8, thus achieving emergency casting.

Claims

1. A hydraulic system for a steelmaking furnace, characterized in that: It includes an automatic casting hydraulic circuit, a manual casting hydraulic circuit, a pressure tank hydraulic circuit, and a hydraulic pump station; The hydraulic pump station includes a hydraulic pump (1), a motor (2), an oil tank (3), a safety valve (4), and a filter (16). The motor (2) is installed on the upper part of the oil tank (3), and the hydraulic pump (1) is installed on the motor shaft. The oil suction port of the hydraulic pump (1) extends into the hydraulic oil in the oil tank (3). The filter (16) is installed on the pressure port of the hydraulic pump (1), and the safety valve (4) is installed on the pipeline branch after the filter (16). The automatic casting hydraulic circuit includes a proportional directional valve (6) and a hydraulic control check valve (7). The proportional directional valve (6) is connected to the casting hydraulic cylinder (8) for control. The hydraulic control check valve (7) is installed between the proportional directional valve (6) and the casting hydraulic cylinder (8). The manual casting hydraulic circuit includes a check valve (5), a manual reversing valve (9) and a throttle valve (10). The manual reversing valve (9) is connected to the casting hydraulic cylinder (8) for control. The throttle valve (10) is located between the manual reversing valve (9) and the casting hydraulic cylinder (8). The check valve (5) is installed between the manual casting hydraulic circuit and the automatic hydraulic casting circuit. The hydraulic circuit of the pressure tank includes a pressure gauge (11), a pressure tank (13), an automatic switching valve (14), and a manual ball valve (15). The pressure gauge (11) is installed below the pressure tank (13). The manual ball valve (15) and the automatic switching valve (14) are installed side by side and serve as a bypass valve for the automatic switching valve (14).

2. The hydraulic system for a steelmaking furnace according to claim 1, characterized in that: The proportional directional valve (6) is a three-position four-way electromagnetic proportional directional valve.

3. The hydraulic system for a steelmaking furnace according to claim 2, characterized in that: The manual directional valve (9) is a three-position four-way directional valve that is controlled and connected to the casting hydraulic cylinder (8).

4. The hydraulic system for a steelmaking furnace according to claim 1, characterized in that: The pressure tank (13) is a spring-loaded pressure tank.

5. A hydraulic system for a steelmaking furnace according to claim 1, characterized in that: The automatic switching valve (14) is a two-position two-way electromagnetic directional valve.

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