An adjustable hydraulic control system

Abstract

The utility model discloses an adjustable hydraulic control system relates to hydraulic control technical field, include: oil tank, reversing valve, throttle valve and executive component, and oil tank is communicated with the P mouth of reversing valve through oil pump, and the A mouth and B mouth of reversing valve are communicated with two working cavities of executive component respectively, and two working cavities of executive component are communicated through adjusting pipeline, is provided with throttle valve on adjusting pipeline, the utility model discloses can control the pressure of both sides of throttle valve to change through the control throttle valve, and the pressure of two working cavities of executive component is regulated and controlled, and then realizes the control of the speed of executive component adjustment.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic control technology, and in particular to an adjustable hydraulic control system. Background Technology

[0002] Hydraulic systems play a vital role in the machinery manufacturing industry. A complete hydraulic system consists of five parts: power components, actuators, control components, auxiliary components, and hydraulic oil. Depending on the specific application, appropriate control components can be selected to achieve better performance.

[0003] Most hydraulic control systems that drive actuators to move currently include an oil tank, an oil pump, and a directional valve. The oil pump delivers hydraulic oil from the tank to the directional valve, which controls the flow of the hydraulic oil, directing it through port A or port B to one of the two working chambers of the actuator, thereby enabling the actuator to move. However, in this hydraulic control system, it is not convenient to control the speed of the actuator.

[0004] Therefore, there is an urgent need for an adjustable hydraulic control system where the speed of the actuator can be adjusted. Utility Model Content

[0005] The purpose of this invention is to provide an adjustable hydraulic control system to solve the problems existing in the prior art. By using a throttle valve, the pressure of the two working chambers of the actuator can be adjusted, thereby realizing the control of the actuator's speed.

[0006] To achieve the above objectives, the present invention provides the following solution: The present invention provides an adjustable hydraulic control system, including an oil tank, a reversing valve, a throttle valve, and an actuator. The oil tank is connected to the P port of the reversing valve via an oil pump. The A port and B port of the reversing valve are respectively connected to the two working chambers of the actuator. The two working chambers of the actuator are connected via an adjusting pipeline, and the throttle valve is provided on the adjusting pipeline.

[0007] Preferably, a first overflow valve and a second overflow valve are respectively provided on the inlet and outlet oil lines of the two working chambers of the actuator. The P port of the first overflow valve is connected to the inlet and outlet oil line of one working chamber of the actuator, and the P port of the second overflow valve is connected to the inlet and outlet oil line of the other working chamber of the actuator.

[0008] Preferably, both ends of the first overflow valve and both ends of the second overflow valve are connected to the inlet and outlet oil passages of the two working chambers of the actuator.

[0009] Preferably, a first pressure testing connector is provided at the position where the T-port of the first overflow valve connects to the inlet and outlet oil circuit, and a second pressure testing connector is provided at the position where the T-port of the second overflow valve connects to the inlet and outlet oil circuit.

[0010] Preferably, a first valve and a second valve are respectively provided on the inlet and outlet oil lines of the two working chambers of the actuator.

[0011] Preferably, both the first valve and the second valve are ball valves.

[0012] Preferably, a third pressure testing connector is provided on the oil line of the first valve near the reversing valve, and a fourth pressure testing connector is provided on the oil line of the second valve near the reversing valve.

[0013] Preferably, a first balancing valve with a check valve and a second balancing valve with a check valve are respectively provided on the inlet and outlet oil lines of the two working chambers of the actuator. Both the first balancing valve with a check valve and the second balancing valve with a check valve include a check valve and an overflow valve arranged in parallel. The check valves of both the first balancing valve with a check valve and the second balancing valve with a check valve allow oil to flow freely to the working chamber of the actuator. The P port of the overflow valve of both the first balancing valve with a check valve and the second balancing valve with a check valve is connected to the two working chambers of the actuator, and the control port of the overflow valve on the oil outlet side is connected to the control oil.

[0014] Preferably, the control port of the first relief valve with a one-way valve is connected to the oil circuit of the second balance valve with a one-way valve near the directional valve, and the control port of the second relief valve with a one-way valve is connected to the oil circuit of the first balance valve with a one-way valve near the directional valve.

[0015] Preferably, the directional valve is a proportional directional valve.

[0016] The present invention achieves the following main technical effects compared to the prior art: By controlling the throttle valve, the pressure on both sides of the throttle valve can be changed, thereby regulating the pressure in the two working chambers of the actuator and thus controlling the speed of the actuator.

[0017] The other solutions of this utility model achieve the following technical effects compared to the prior art: The installation of the first and second relief valves can prevent danger caused by excessive pressure.

[0018] The first ball valve and the second ball valve can conveniently control the on / off state of the hydraulic oil circuit.

[0019] The first and second one-way valve balance valves ensure safe operation of the actuators and stable system operation. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a system diagram of the adjustable hydraulic control system in an embodiment of the present invention; Among them, 1. reversing valve; 2. first valve; 3. second valve; 4. first balance valve with check valve; 5. second balance valve with check valve; 6. first relief valve; 7. second relief valve; 8. throttle valve; 9. actuator; 10. first pressure test connector; 11. second pressure test connector; 12. third pressure test connector; 13. fourth pressure test connector. Detailed Implementation

[0022] 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.

[0023] The purpose of this invention is to provide an adjustable hydraulic control system to solve the problems existing in the prior art. By using a throttle valve, the pressure of the two working chambers of the actuator can be adjusted, thereby realizing the control of the actuator's speed.

[0024] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] Please refer to the following: Figure 1As shown, an adjustable hydraulic control system is provided, including an oil tank, a directional valve 1, a throttle valve 8, and an actuator 9. The oil tank is connected to the P port of the directional valve 1 via an oil pump. The A port and B port of the directional valve 1 are connected to the two working chambers of the actuator 9 via inlet and outlet oil circuits, respectively. The two working chambers of the actuator 9 are connected via an adjustment pipeline. The adjustment pipeline is equipped with a throttle valve 8. By controlling the throttle valve 8 through a corresponding control module, the pressure on both sides of the throttle valve 8 can be changed, thereby regulating the pressure of the two working chambers of the actuator 9 and thus controlling the speed of the actuator 9.

[0026] The two ends of the regulating pipeline can be directly connected to the inlet and outlet oil lines on both sides, which avoids setting up additional passages to connect the regulating pipeline to the two working chambers of the actuator 9.

[0027] In one embodiment, a first overflow valve 6 and a second overflow valve 7 are respectively provided on the inlet and outlet oil lines of the two working chambers of the actuator 9. The P port of the first overflow valve 6 is connected to the inlet and outlet oil line of one working chamber of the actuator 9, and the P port of the second overflow valve 7 is connected to the inlet and outlet oil line of the other working chamber of the actuator 9. The T ports of the first overflow valve 6 and the second overflow valve 7 are connected to the oil tank. When the pressure in the inlet and outlet oil line connected to the P port of the overflow valve is too high, the pressure will be relieved through the overflow valve to avoid danger caused by excessive pressure.

[0028] Both ends of the first overflow valve 6 and both ends of the second overflow valve 7 can be connected to the inlet and outlet oil passages of the two working chambers of the actuator 9. That is, the T port of the overflow valve is no longer connected to the oil tank separately, but is connected to the oil tank through the inlet and outlet oil passages, which can save on the layout of pipelines.

[0029] A first pressure testing connector 10 is provided at the position where the T port of the first relief valve 6 connects to the inlet and outlet oil circuits, and a second pressure testing connector 11 is provided at the position where the T port of the second relief valve 7 connects to the inlet and outlet oil circuits. Pressure detection equipment can be connected to the first pressure testing connector 10 and the second pressure testing structure to monitor the pressure in the inlet and outlet oil circuits at all times. The pressure information can be transmitted to the display device in the control room where the operator is located via an electrical signal for display.

[0030] In one embodiment, a first valve 2 and a second valve 3 are respectively provided on the inlet and outlet oil lines of the two working chambers of the actuator 9, which can conveniently realize the control of the hydraulic oil circuit on and off. When it is necessary to stop the entire system, the oil pump and valves can be turned off safely.

[0031] In this embodiment, both the first valve 2 and the second valve 3 are ball valves, which are electrically controlled valves and controlled by a corresponding control module; in other embodiments, other electrically controlled valves may also be selected as the first valve 2 and the second valve 3.

[0032] A third pressure testing connector 12 is installed on the oil line of the first valve 2 near the reversing valve 1, and a fourth pressure testing connector 13 is installed on the oil line of the second valve 3 near the reversing valve 1. Pressure detection equipment can be connected to the third pressure testing connector 12 and the fourth pressure testing structure to monitor the pressure in the oil lines on both sides. The pressure information can be transmitted to the display device in the control room where the operator is located via an electrical signal for display.

[0033] In one embodiment, a first balancing valve 4 and a second balancing valve 5 with check valves are respectively installed on the inlet and outlet oil lines of the two working chambers of the actuator 9. Both the first balancing valve 4 and the second balancing valve 5 include a check valve and a relief valve connected in parallel. The check valves of both the first balancing valve 4 and the second balancing valve 5 allow oil to flow freely into the working chambers of the actuator 9. The P port of the relief valve of both the first balancing valve 4 and the second balancing valve 5 is connected to the two working chambers of the actuator 9. The working chambers are connected. During normal oil supply, hydraulic oil can enter the working chamber of the actuator 9 through the check valve. The control port of the relief valve on the oil outlet side is connected to the control oil to open the relief valve, ensuring normal oil output without affecting the normal operation of the actuator 9. Moreover, the relief valve can work with the first relief valve 6 and the second relief valve 7 to achieve dual protection of system pressure, avoiding danger caused by excessive pressure. That is, the first one-way valve balance valve 4 and the second one-way valve balance valve 5 can ensure the safe operation of the actuator 9 and the stable operation of the system.

[0034] The control port of the overflow valve of the first one-way valve type balance valve 4 can be connected to the oil circuit of the second one-way valve type balance valve 5 near the reversing valve 1. The control port of the overflow valve of the second one-way valve type balance valve 5 can be connected to the oil circuit of the first one-way valve type balance valve 4 near the reversing valve 1. In this way, when oil enters the oil inlet and outlet oil circuits on the oil inlet side, the control port of the overflow valve on the oil outlet side can be automatically connected to the control oil, avoiding the need to draw a separate control oil circuit from the oil pump to control the overflow valve, thus saving on pipeline layout.

[0035] In this embodiment, the directional valve 1 is a proportional directional valve. In other embodiments, a conventional directional valve may also be used.

[0036] In actual use, after opening the first valve 2 and the second valve 3, oil enters the P port of the directional valve 1 and the directional valve 1 is energized in the parallel position. At this time, the hydraulic oil flows from the P port of the directional valve 1 through the A port and reaches the first valve 2. After flowing through the first valve 2, the hydraulic oil enters the pilot control oil circuit of the first check valve type balance valve 4 and the second check valve type balance valve 5. After entering the first check valve type balance valve 4, the check valve in the first check valve type balance valve 4 opens. After entering the pilot oil circuit of the second check valve type balance valve 5, the relief valve in the second check valve type balance valve 5 opens. The hydraulic oil flows through the first check valve type balance valve 4 and reaches the working chamber A1 of the actuator 9, and the actuator 9 moves in the forward direction.

[0037] When the directional control valve 1 is energized at the cross position, hydraulic oil flows from port P of the directional control valve 1 through port B and the second valve 3, reaching the pilot control oil circuit of the second check valve 5 and the first check valve 4. At this time, the second check valve opens, and hydraulic oil flows into the working chamber B1 of the actuator 9. Simultaneously, the relief valve in the first check valve 4 opens, and the hydraulic oil in the working chamber A1 flows through the first check valve 4 and the first valve 2, reaching port T of the directional control valve 1, and finally enters the system return oil, causing the actuator 9 to reverse its action.

[0038] When the actuator 9 moves too fast in the forward direction, the throttle valve 8 is adjusted to reduce the pressure in working chamber A1 and increase the pressure in working chamber B1, thereby reducing the operating speed of the actuator 9. When the actuator 9 moves too fast in the reverse direction, the throttle valve 8 is adjusted to reduce the pressure in working chamber B1 and increase the pressure in working chamber A1, thereby reducing the operating speed of the actuator 9.

[0039] When the forward movement of actuator 9 is too slow, the throttle valve 8 is adjusted to increase the pressure in working chamber A1 and decrease the pressure in working chamber B1, thereby increasing the operating speed of actuator 9. When the reverse movement of actuator 9 is too slow, the throttle valve 8 is adjusted to increase the pressure in working chamber B1 and decrease the pressure in working chamber A1, thereby increasing the operating speed of actuator 9.

[0040] When the pressure in working chamber A1 is too high, the second relief valve 7 is adjusted electronically by the control module to reduce the pressure in working chamber A1. When the pressure in working chamber B1 is too high, the first relief valve 6 is adjusted electronically by the control module to reduce the pressure in working chamber B1 to prevent excessive pressure from causing danger.

[0041] The system pressure is monitored at any time through the first pressure test connector 10, the second pressure test connector 11, the third pressure test connector 12, and the fourth pressure test connector 13.

[0042] Any adaptive changes made according to actual needs are within the protection scope of this utility model.

[0043] It should be noted that, for those skilled in the art, it is obvious that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this utility model is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0044] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. An adjustable hydraulic control system, characterized in that, The device includes an oil tank, a reversing valve, a throttle valve, and an actuator. The oil tank is connected to the P port of the reversing valve via an oil pump. The A port and B port of the reversing valve are respectively connected to the two working chambers of the actuator. The two working chambers of the actuator are connected via a regulating pipeline, and the throttle valve is installed on the regulating pipeline. A first overflow valve and a second overflow valve are respectively provided on the inlet and outlet oil lines of the two working chambers of the actuator. The P port of the first overflow valve is connected to the inlet and outlet oil line of one working chamber of the actuator, and the P port of the second overflow valve is connected to the inlet and outlet oil line of the other working chamber of the actuator.

2. The adjustable hydraulic control system according to claim 1, characterized in that, Both ends of the first relief valve and both ends of the second relief valve are connected to the inlet and outlet oil passages of the two working chambers of the actuator.

3. The adjustable hydraulic control system according to claim 2, characterized in that, A first pressure testing connector is provided at the position where the T-port of the first overflow valve connects to the inlet and outlet oil circuit, and a second pressure testing connector is provided at the position where the T-port of the second overflow valve connects to the inlet and outlet oil circuit.

4. The adjustable hydraulic control system according to claim 1, characterized in that, The two working chambers of the actuator are respectively equipped with a first valve and a second valve on their inlet and outlet oil lines.

5. The adjustable hydraulic control system according to claim 4, characterized in that, Both the first valve and the second valve are ball valves.

6. The adjustable hydraulic control system according to claim 4, characterized in that, A third pressure testing connector is provided on the oil line of the first valve near the reversing valve, and a fourth pressure testing connector is provided on the oil line of the second valve near the reversing valve.

7. The adjustable hydraulic control system according to claim 1, characterized in that, The inlet and outlet oil lines of the two working chambers of the actuator are respectively provided with a first one-way valve and a second one-way valve. Both the first one-way valve and the second one-way valve include a one-way valve and an overflow valve arranged in parallel. The one-way valves of the first one-way valve and the second one-way valve allow oil to flow freely to the working chamber of the actuator. The P port of the overflow valve of the first one-way valve and the second one-way valve is connected to the two working chambers of the actuator, respectively. The control port of the overflow valve on the oil outlet side is connected to the control oil.

8. The adjustable hydraulic control system according to claim 7, characterized in that, The control port of the first relief valve with a one-way valve is connected to the oil circuit of the second balance valve with a one-way valve near the directional valve, and the control port of the relief valve of the second balance valve with a one-way valve is connected to the oil circuit of the first balance valve with a one-way valve near the directional valve.

9. The adjustable hydraulic control system according to claim 1, characterized in that, The directional valve is a proportional directional valve.

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