Hydraulic system applied to large filter press

Abstract

The utility model discloses a hydraulic system applied to a large filter press, which comprises an oil tank, a motor, a first oil pump, a one-way valve, an overflow valve, an electromagnetic directional valve, a main cylinder, a second oil pump, a second electromagnetic directional valve, an unloading valve, an on-off valve, a pressure relief valve, a pressurizing cylinder and a prefill valve, and the motor is connected with the first oil pump and / or the second oil pump and controls the operation of the first oil pump and / or the second oil pump; the system further comprises a proportional valve, the second oil pump is connected with a first oil port of the proportional valve through an oil way seventeenth, a second oil port of the proportional valve is connected with a fourth oil port of the on-off valve through an oil way eighteenth, and a third oil port of the proportional valve is communicated with an oil way sixteenth through an oil way nineteenth. And a fourth oil port of the proportional valve is communicated with an oil path 22 through an oil path 23. The pressure in the hydraulic system is controlled by a proportional valve, and a PLC gives a signal to the proportional valve to set the pressure and flow required by operation of the main cylinder and / or the pressurizing cylinder so as to control the movement speed and pressure of the main cylinder and / or the pressurizing cylinder.

Description

Technical Field

[0001] The utility model belongs to the field of mechanical hydraulic systems and relates to a hydraulic system applied to a large filter press, comprising an oil tank, an air filter, a liquid level gauge, an oil suction filter, a motor, a first oil pump, a one-way valve, a relief valve, an electromagnetic reversing valve and a master cylinder. Background Art

[0002] At present, the existing filter press environmental protection equipment generally adopts small filter presses due to their volume and tonnage in actual applications. The hydraulic system used by this small filter press not only has the shortcomings of high power consumption and low pressure in actual production, but also has low equipment utilization efficiency, thereby increasing production costs. Summary of the invention

[0003] In view of the above-mentioned prior art, the technical problem to be solved by the utility model is to provide a hydraulic system applied to a large filter press. The hydraulic system has the characteristics of high pressure stability. It is not only suitable for large filter presses with large tonnage, but also can greatly improve the utilization efficiency of the equipment under the condition of the same power consumption.

[0004] In order to solve the above technical problems, the hydraulic system of the utility model includes an oil tank, an air filter, a liquid level gauge, an oil suction filter, a motor, a first oil pump, a one-way valve, a relief valve, an electromagnetic reversing valve, and a master cylinder. The oil tank is equipped with an air filter, the oil tank is equipped with a liquid level gauge, the oil tank is connected to the first oil pump through oil circuit one, the oil circuit one is equipped with an oil suction filter, the oil port one of the master cylinder is connected to the first oil port of the first electromagnetic reversing valve through oil circuit two, the oil port two of the master cylinder is connected to the second oil port of the first electromagnetic reversing valve through oil circuit three, and the third oil port of the first electromagnetic reversing valve is connected to the first oil pump through oil circuit four.

[0005] As an improvement of the utility model, the hydraulic system further comprises a second oil pump, a second electromagnetic reversing valve, an unloading valve, an on-off valve, a pressure relief valve, a pressurizing cylinder, and a liquid filling valve;

[0006] The motor is connected to and controls the operation of the first oil pump and / or the second oil pump;

[0007] Further, the oil port 1 of the pressurizing cylinder is connected to the oil tank through the oil circuit 5 equipped with the filling valve, the first oil port of the on-off valve and the first oil port of the pressure relief valve are connected through the oil circuit 6, and the oil port 2 of the pressurizing cylinder is connected to the oil circuit 6 through the oil circuit 7;

[0008] Further, the first oil port of the unloading valve is connected to the oil circuit 2 through the oil circuit 8, the second oil port of the unloading valve is connected to the first oil port of the second electromagnetic reversing valve through the oil circuit 9, the second oil port of the second electromagnetic reversing valve is connected to the oil circuit 4 through the oil circuit 10, and the third oil port of the second electromagnetic reversing valve is connected to the charging valve through the oil circuit 11;

[0009] Further, the fourth oil port of the first electromagnetic reversing valve is connected to the oil circuit nine through the oil circuit twelve;

[0010] Further, the second oil port of the on-off valve is connected to the oil circuit nine through the oil circuit thirteen, and the third oil port of the on-off valve is connected to the oil circuit ten through the oil circuit fourteen;

[0011] Further, the second oil port of the pressure relief valve is connected to the oil tank through oil circuit 16, and oil circuit 16 is connected to oil circuit 9;

[0012] Further, the first oil port of the overflow valve is connected to the oil circuit four through the oil circuit twenty, the second oil port of the overflow valve is connected to the oil circuit eighteen through the oil circuit twenty-one, and the third oil port of the overflow valve is connected to the oil circuit sixteen through the oil circuit twenty-two.

[0013] The electromagnetic reversing valve can deliver hydraulic oil to the main cylinder and the pressure cylinder after being energized. The hydraulic circuit has the function of maintaining pressure after the motor stops.

[0014] As another improvement of the utility model, it also includes a proportional valve, the second oil pump is connected to the first oil port of the proportional valve through oil circuit 17, the second oil port of the proportional valve is connected to the fourth oil port of the on-off valve through oil circuit 18, the third oil port of the proportional valve is connected to the oil circuit 16 through oil circuit 19, and the fourth oil port of the proportional valve is connected to the oil circuit 22 through oil circuit 23.

[0015] The pressure in the hydraulic system is controlled by a proportional valve.

[0016] As another improvement of the utility model, it also includes an intercommunication valve, and the oil circuit 7 and the oil circuit 2 are interconnected through the oil circuit 15 installed with the intercommunication valve.

[0017] The intercommunication valve can provide synchronous differential for the master cylinder and the booster cylinder, making the hydraulic system run more smoothly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0019] Figure 1 It is a schematic diagram of the interconnected structure between various components in the utility model.

[0020] In the figure: 1-oil tank, 2-air filter, 3-heater, 4-temperature sensor, 5-liquid level gauge, 6-oil suction filter, 7-motor, 81-first oil pump, 82-second oil pump, 91-first one-way valve, 92-second one-way valve, 93-third one-way valve, 10-overflow valve, 11-proportional valve, 131-first solenoid reversing valve, 132-second solenoid reversing valve, 15-unloading valve, 16-on-off valve, 17-pressure relief valve, 19-intercommunication valve, 20-master cylinder, 21-pressurization cylinder, 22-filling valve. DETAILED DESCRIPTION

[0021] Figure 1 It is shown that the hydraulic system of the utility model includes an oil tank 1, an air filter 2, a liquid level gauge 5, an oil suction filter 6, a motor 7, a first oil pump 81, a one-way valve, a relief valve 10, an electromagnetic reversing valve, and a master cylinder 20. The oil tank 1 is equipped with an air filter 2, the oil tank 1 is equipped with a liquid level gauge 5, the oil tank 1 is connected to the first oil pump 81 through an oil circuit 1, the oil circuit 1 is equipped with an oil suction filter 6, the oil port 1 of the master cylinder 20 is connected to the first oil port of the first electromagnetic reversing valve 131 through an oil circuit 2, the oil port 2 of the master cylinder 20 is connected to the second oil port of the first electromagnetic reversing valve 131 through an oil circuit 3, and the third oil port of the first electromagnetic reversing valve 131 is connected to the first oil pump 81 through an oil circuit 4.

[0022] As an improvement of the utility model, the hydraulic system further includes a second oil pump 82, a second electromagnetic reversing valve 132, an unloading valve 15, an on-off valve 16, a pressure relief valve 17, a pressurizing cylinder 21, and a filling valve 22;

[0023] The motor 7 is connected to and controls the operation of the first oil pump 81 and / or the second oil pump 82;

[0024] Among them, the oil port 1 of the pressurizing cylinder 21 is connected to the oil tank 1 through the oil circuit 5 installed with the filling valve 22, the first oil port of the on-off valve 16 is connected with the first oil port of the pressure relief valve 17 through the oil circuit 6, and the oil port 2 of the pressurizing cylinder 21 is connected with the oil circuit 6 through the oil circuit 7;

[0025] Among them, the first oil port of the unloading valve 15 is connected to the oil circuit 2 through the oil circuit 8, the second oil port of the unloading valve 15 is connected to the first oil port of the second electromagnetic reversing valve 132 through the oil circuit 9, the second oil port of the second electromagnetic reversing valve 132 is connected to the oil circuit 4 through the oil circuit 10, and the third oil port of the second electromagnetic reversing valve 132 is connected to the filling valve 22 through the oil circuit 11;

[0026] Among them, the fourth oil port of the first electromagnetic reversing valve 131 is connected to the oil circuit nine through the oil circuit twelve;

[0027] Among them, the second oil port of the on-off valve 16 is connected to the oil circuit nine through the oil circuit thirteen, and the third oil port of the on-off valve 16 is connected to the oil circuit ten through the oil circuit fourteen;

[0028] Among them, the second oil port of the pressure relief valve 17 is connected to the oil tank 1 through the oil circuit 16, and the oil circuit 16 is connected to the oil circuit 9;

[0029] Among them, the first oil port of the overflow valve 10 is connected to the oil circuit four through the oil circuit twenty, the second oil port of the overflow valve 10 is connected to the oil circuit eighteen through the oil circuit twenty-one, and the third oil port of the overflow valve 10 is connected to the oil circuit sixteen through the oil circuit twenty-two.

[0030] The overflow valve 10 can protect the hydraulic system by limiting the maximum pressure of the hydraulic system. The unloading valve 15 and the filling valve 22 in the hydraulic circuit realize the rapid movement of the master cylinder 20 and the pressure cylinder 21 through the control of the electromagnetic reversing valve.

[0031] Furthermore, the oil circuit 4 is installed with a first one-way valve 91, and the oil circuit 2 is installed with a third one-way valve 93.

[0032] The oil tank 1 is also equipped with a heater 3 and a temperature sensor 4.

[0033] The second oil pump 82 is connected to the oil tank 1 through oil passage 24.

[0034] As another improvement of the utility model, it also includes a proportional valve 11, the second oil pump 82 is connected to the first oil port of the proportional valve 11 through the oil circuit seventeen, the second oil port of the proportional valve 11 is connected to the fourth oil port of the on-off valve 16 through the oil circuit eighteen, the third oil port of the proportional valve 11 is connected to the oil circuit sixteen through the oil circuit nineteen, and the fourth oil port of the proportional valve 11 is connected to the oil circuit twenty-two through the oil circuit twenty-three.

[0035] The PLC gives a signal to the proportional valve 11 to set the pressure and flow required for the operation of the master cylinder 20 and / or the pressurizing cylinder 21 to control the movement speed and pressure of the master cylinder 20 and / or the pressurizing cylinder 21.

[0036] Furthermore, a second one-way valve 92 is installed in the oil circuit 18.

[0037] As another improvement of the utility model, it also includes an intercommunication valve 19, and the oil circuit 7 and the oil circuit 2 are interconnected through the oil circuit 15 installed with the intercommunication valve 19.

[0038] Under the action of the proportional valve 11, the unloading valve 15, the on-off valve 16, the pressure relief valve 17 and the intercommunication valve 19, the hydraulic system of the utility model has the characteristic of high pressure stability.

[0039] The main technical parameters of the hydraulic system described in this embodiment are as follows:

[0040] Motor power: 37KW-4P; displacement of the first oil pump and the second oil pump: T6EC; oil tank capacity: 1000L; proportional valve control mode: 0-10V; solenoid reversing valve voltage level: DC24V.

Claims

1. A hydraulic system for a large filter press, comprising an oil tank (1), an air filter (2), a liquid level gauge (5), an oil suction filter (6), a motor (7), a first oil pump (81), a one-way valve, a relief valve (10), an electromagnetic reversing valve, and a master cylinder (20), wherein the oil tank (1) is provided with an air filter (2), the oil tank (1) is provided with a liquid level gauge (5), the oil tank (1) is connected to the first oil pump (81) through an oil circuit 1, the oil circuit 1 is provided with an oil suction filter (6), an oil port 1 of the master cylinder (20) is connected to a first oil port of a first electromagnetic reversing valve (131) through an oil circuit 2, an oil port 2 of the master cylinder (20) is connected to a second oil port of the first electromagnetic reversing valve (131) through an oil circuit 3, and a third oil port of the first electromagnetic reversing valve (131) is connected to the first oil pump (81) through an oil circuit 4, characterized in that: It also includes a second oil pump (82), a second electromagnetic reversing valve (132), an unloading valve (15), an on-off valve (16), a pressure relief valve (17), a pressurizing cylinder (21), and a liquid filling valve (22). The motor (7) is connected to and controls the operation of the first oil pump (81) and / or the second oil pump (82); The oil port 1 of the pressurizing cylinder (21) is connected to the oil tank (1) through the oil circuit 5 equipped with the filling valve (22), the first oil port of the on-off valve (16) and the first oil port of the pressure relief valve (17) are connected through the oil circuit 6, and the oil port 2 of the pressurizing cylinder (21) is connected to the oil circuit 6 through the oil circuit 7; The first oil port of the unloading valve (15) is connected to the oil circuit 2 through the oil circuit 8, the second oil port of the unloading valve (15) is connected to the first oil port of the second electromagnetic reversing valve (132) through the oil circuit 9, the second oil port of the second electromagnetic reversing valve (132) is connected to the oil circuit 4 through the oil circuit 10, and the third oil port of the second electromagnetic reversing valve (132) is connected to the filling valve (22) through the oil circuit 11; The fourth oil port of the first electromagnetic reversing valve (131) is connected to the oil circuit nine through the oil circuit twelve; The second oil port of the on-off valve (16) is connected to the oil circuit nine through the oil circuit thirteen, and the third oil port of the on-off valve (16) is connected to the oil circuit ten through the oil circuit fourteen; The second oil port of the pressure relief valve (17) is connected to the oil tank (1) via an oil circuit 16, and the oil circuit 16 is connected to the oil circuit 9; Among them, the first oil port of the overflow valve (10) is connected to the oil circuit 4 through the oil circuit 20, the second oil port of the overflow valve (10) is connected to the oil circuit 18 through the oil circuit 21, and the third oil port of the overflow valve (10) is connected to the oil circuit 16 through the oil circuit 22.

2. The hydraulic system for large filter press according to claim 1, characterized in that: It also includes an intercommunication valve (19), and the oil circuit 7 and the oil circuit 2 are interconnected through the oil circuit 15 installed with the intercommunication valve (19).

3. The hydraulic system for large filter press according to claim 1, characterized in that: It also includes a proportional valve (11), a second oil pump (82) connected to a first oil port of the proportional valve (11) via an oil circuit 17, a second oil port of the proportional valve (11) connected to a fourth oil port of the on-off valve (16) via an oil circuit 18, a third oil port of the proportional valve (11) connected to an oil circuit 16 via an oil circuit 19, and a fourth oil port of the proportional valve (11) connected to an oil circuit 22 via an oil circuit 23.

4. The hydraulic system for large filter press according to claim 3, characterized in that: The oil passage 18 is provided with a second one-way valve (92).

5. The hydraulic system for large filter press according to claim 1, characterized in that: The oil circuit 4 is provided with a first one-way valve (91), and the oil circuit 2 is provided with a third one-way valve (93).

6. The hydraulic system for large filter press according to claim 1, characterized in that: The oil tank (1) is also equipped with a heater (3) and a temperature sensor (4).

7. The hydraulic system for a large filter press according to any one of claims 1 to 6, characterized in that: The second oil pump (82) is connected to the oil tank (1) via an oil passage 24.

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