A multi-cylinder hydraulic control system with good stability

Abstract

The utility model relates to the technical field of assembly line, concretely relates to a good stability multi -cylinder hydraulic control system, it contains the variable oil pump of installation in the oil tank, the variable oil pump export is connected with main oil circuit, is connected with main overflow valve and reversing valve no.

Description

Technical Field

[0001] This utility model relates to the field of assembly line technology, specifically to a multi-cylinder hydraulic control system with good stability. Background Technology

[0002] Hydraulic systems are commonly used in automated assembly, but existing hydraulic systems often face problems such as unstable flow control, difficulty in pressure regulation, and excessively high temperature. In particular, their stability is difficult to guarantee under working conditions with large fluctuations in workload. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings and deficiencies of existing technologies by providing a reasonably designed and stable multi-cylinder hydraulic control system that can solve the aforementioned problems.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: It includes a variable oil pump installed on an oil tank, the outlet of the variable oil pump is connected to a main oil circuit, a main relief valve and a reversing valve I are connected to the main oil circuit, a plurality of main action cylinders for clamping workpieces are installed in parallel on the reversing valve I, a plurality of reversing valves II are also installed on the main oil circuit, each reversing valve II is connected to a secondary action cylinder for independent action, and a bidirectional hydraulic control check valve is connected between each main action cylinder and reversing valve I, and between each secondary action cylinder and reversing valve II.

[0005] Preferably, the main oil circuit is also equipped with an accumulator and a pressure relief valve for depressurization.

[0006] Preferably, both the main actuator cylinder and the auxiliary actuator cylinder are double-acting hydraulic cylinders, and each of their two drive hydraulic lines is connected to a buffer valve.

[0007] Preferably, both the first and second directional control valves are three-position four-way directional control valves, and a sequence valve is also connected between the P port of each second directional control valve and the main oil circuit.

[0008] Preferably, a throttle valve is provided in the main oil circuit after the variable oil pump.

[0009] Preferably, the oil tank is also equipped with a cooler, the oil inlet and outlet of the cooler are both connected to the oil tank, and a temperature sensor is provided on the main oil line, with the temperature sensor signal connected to the cooler.

[0010] Preferably, filters are provided on the inlets of the cooler and the variable oil pump connected to the oil tank.

[0011] Preferably, the oil tank is also equipped with a thermometer and a level gauge.

[0012] The beneficial effects of this utility model after adopting the above structure are: This invention employs an overflow valve, an accumulator, and a pressure relief valve to ensure stable system pressure, prevent overpressure, and maintain system pressure stability for a period of time in the event of system failure. It also provides sufficient reaction time for the actuators in the system and offers a certain pressure buffer during load changes to ensure system stability.

[0013] This invention employs a combination of a variable displacement pump and a throttle valve, enabling the system to flexibly and precisely adjust oil pressure and flow, thereby reducing energy waste.

[0014] This invention employs a main actuator cylinder that operates synchronously and an auxiliary actuator cylinder that operates independently, without interfering with each other, resulting in good operational flexibility.

[0015] This utility model incorporates a buffer valve to reduce the impact of vibration and shock during operation, thereby improving operational stability.

[0016] This invention features an automatic oil temperature monitoring system that can automatically cool the oil when the temperature is too high. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the oil circuit principle of this utility model.

[0018] Explanation of reference numerals in the attached figures: 1. Oil tank; 2. Variable oil pump; 3. Filter; 4. Throttle valve; 5. Accumulator; 6. Pressure relief valve; 7. Main relief valve; 8. Directional control valve one; 9. Main actuator cylinder; 10. Two-way hydraulic check valve; 11. Buffer valve; 12. Directional control valve two; 13. Auxiliary actuator cylinder; 14. Sequence valve; 15. Temperature sensor; 16. Cooler; 17. Thermometer; 18. Level gauge. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] See Figure 1 As shown, it includes a variable oil pump 2 installed on the oil tank 1, which can automatically adjust the output flow according to the system load requirements, thereby ensuring the efficient operation of the hydraulic system under different working conditions; the outlet of the variable oil pump 2 is connected to the main oil circuit, and a throttle valve 4 is installed in the main oil circuit behind the variable oil pump 2 to precisely control the oil flow rate, so as to regulate the working speed and pressure of the system; a main relief valve 7 and a reversing valve 8 are connected to the main oil circuit. The main relief valve 7 is used to control the maximum pressure of the system and prevent overpressure; Four main action cylinders 9 for clamping workpieces are installed in parallel on the first directional valve 8. Two second directional valves 12 are also installed on the main oil line. Each second directional valve 12 is connected to a secondary action cylinder 13 for independent action. These second directional valves 12 control different secondary action cylinders 13. The secondary action cylinders 13 are used to perform independent auxiliary actions, such as adjusting the mold or supporting the work platform. A two-way hydraulic check valve 10 is connected between each main action cylinder 9 and the first directional valve 8, and between each secondary action cylinder 13 and the second directional valve 12, to control the oil flow direction and prevent oil backflow. Both the main actuator cylinder 9 and the auxiliary actuator cylinder 13 are double-acting hydraulic cylinders. Each cylinder has a buffer valve 11 connected to both drive oil lines to reduce the impact and vibration during operation and ensure the smooth operation of the system. Both the first reversing valve 8 and the second reversing valve 12 are three-position four-way reversing valves. Each second reversing valve 12's P port is also connected to the main oil line by a sequence valve 14. The sequence valve 14 is used to ensure the order of oil flow. The auxiliary actuator cylinder 13 will only work after the main actuator cylinder 9 has completed clamping. An accumulator 5 is also installed in the main oil circuit. The accumulator 5 can store a certain amount of hydraulic energy to provide instantaneous support when the system load changes and to maintain the system pressure for a period of time when the pressure drops. A pressure relief valve 6 is also installed next to the accumulator 5 to release pressure when needed. The oil tank 1 is also equipped with a cooler 16, whose oil inlet and outlet are both connected to the oil tank 1. A temperature sensor 15 is installed on the main oil circuit to monitor the temperature change of the oil in real time. When the temperature exceeds the limit, the sensor will send a signal to the cooler 16, and the cooler 16 will start working according to the signal to regulate the oil temperature. The cooler 16 and the variable oil pump 2 are both equipped with filters 3 on the pipes connecting to the oil tank 1 to clean the oil and remove impurities and particles to ensure the stability of the hydraulic system. The oil tank 1 is also equipped with a thermometer 17 and a level gauge 18, which allow the operator to monitor the status of the system oil in real time to ensure that the system operates under the best working conditions.

[0021] It should be understood that the above-described specific embodiments of this utility model are merely illustrative or explanatory of the principles of this utility model and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within the protection scope of this utility model. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A multi-cylinder hydraulic control system with good stability, comprising a variable displacement pump (2) mounted on an oil tank (1), characterized in that: The outlet of the variable oil pump (2) is connected to the main oil circuit, and the main oil circuit is connected to the main relief valve (7) and the first directional valve (8). Multiple main action cylinders (9) for clamping workpieces are installed in parallel on the first directional valve (8). Multiple second directional valves (12) are also installed on the main oil circuit. Each second directional valve (12) is connected to a secondary action cylinder (13) for independent action. A two-way hydraulic check valve (10) is connected between each main action cylinder (9) and the first directional valve (8), and between each secondary action cylinder (13) and the second directional valve (12).

2. The multi-cylinder hydraulic control system with good stability according to claim 1, characterized in that: The main oil circuit is also equipped with an accumulator (5) and a pressure relief valve (6) for pressure relief.

3. The multi-cylinder hydraulic control system with good stability according to claim 1, characterized in that: Both the main actuator cylinder (9) and the auxiliary actuator cylinder (13) are double-acting hydraulic cylinders, and each of their two drive oil lines is connected to a buffer valve (11).

4. The multi-cylinder hydraulic control system with good stability according to claim 3, characterized in that: Both the first reversing valve (8) and the second reversing valve (12) are three-position four-way reversing valves. Each second reversing valve (12) is connected to the main oil circuit via a sequence valve (14) at its P port.

5. The multi-cylinder hydraulic control system of claim 1, wherein: A throttle valve (4) is provided in the main oil circuit behind the variable oil pump (2).

6. The multi-cylinder hydraulic control system of claim 1, wherein: The oil tank (1) is also equipped with a cooler (16). The oil inlet and outlet of the cooler (16) are connected to the oil tank (1). A temperature sensor (15) is provided on the main oil line. The signal of the temperature sensor (15) is connected to the cooler (16).

7. The multi-cylinder hydraulic control system of claim 6, wherein: The cooler (16) and the variable oil pump (2) are both equipped with filters (3) on the pipes connecting them to the oil tank (1).

8. The multi-cylinder hydraulic control system of claim 1, wherein: The oil tank (1) is also equipped with a thermometer (17) and a level gauge (18).

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