Flow regulating hydraulic device

Abstract

The utility model provides a kind of flow regulating hydraulic device.The flow regulating hydraulic device includes flow control valve, oil cylinder and reversing valve, each oil cylinder is connected with rod cavity oil circuit, rodless cavity oil circuit and is connected with a reversing valve, multiple reversing valves are connected with flow control valve;The end of flow control valve away from reversing valve is connected with oil tank;Flow control valve and / or reversing valve act, to form oil inlet with oil tank and certain or certain rod cavity oil circuit, the rodless cavity oil circuit on the oil cylinder communicated with rod cavity oil circuit is communicated with oil tank and forms oil return line;Or, flow control valve act forms oil inlet with oil tank and certain or certain rodless cavity oil circuit, the rod cavity oil circuit on the oil cylinder communicated with rodless cavity oil circuit forms oil return line.The utility model can reduce the quantity of flow control valve, to reduce the cost of hydraulic device, reduce the volume of device, be convenient for arrangement on equipment space.

Description

Technical Field

[0001] This utility model relates to the field of engineering machinery technology, and in particular to a flow regulating hydraulic device. Background Technology

[0002] In engineering machinery, actuators are often driven by hydraulic systems. Hydraulic systems require flow control based on their stroke; therefore, flow adjustment devices are typically connected to the actuators.

[0003] like Figure 1 As shown, existing flow regulation devices use a multi-way valve connected to a hydraulic actuator, and the flow rate is adjusted and controlled by changing the oil flow area through the movement of a spool valve. This device is relatively large, requires significant space, complicates equipment layout, and increases costs. Utility Model Content

[0004] The purpose of this invention is to provide a flow regulating hydraulic device that can reduce volume and facilitate layout in equipment space.

[0005] The technical solution of this utility model is: a flow regulating hydraulic device, including a flow control valve, multiple oil cylinders, and directional valves corresponding to each of the multiple oil cylinders. Each oil cylinder is connected to a rod-side oil passage and a rodless-side oil passage. Each oil cylinder's rod-side oil passage and rodless-side oil passage are connected to a directional valve. Multiple directional valves are connected to the flow control valve. The end of the flow control valve away from the directional valve is connected to an oil tank.

[0006] The flow control valve and / or directional valve actuate to connect the oil tank to one or more rod-side oil passages to form an oil inlet passage, while the rodless oil passage on the cylinder connected by the rod-side oil passage is connected to the oil tank to form a return passage; or, the flow control valve actuates to connect the oil tank to one or more rodless oil passages to form an oil inlet passage, while the rod-side oil passage on the cylinder connected by the rodless oil passage is connected to form a return passage.

[0007] Preferably, each cylinder is equipped with a hydraulic lock, which is connected to the rod-side hydraulic circuit and the rodless hydraulic circuit.

[0008] Preferably, an overflow valve is also installed on the pipeline connecting the multiple directional valves to the oil tank.

[0009] Preferably, the flow control valve is a proportional flow control valve. The proportional flow control valve precisely regulates the flow rate of the hydraulic system via an electrical signal. Its core principle is to convert the input current into valve core displacement, maintain a stable pressure differential through a pressure compensation mechanism, and ensure a linear relationship between the flow rate and the signal.

[0010] Compared with related technologies, the beneficial effects of this utility model are as follows:

[0011] 1. This utility model has a multi-way hydraulic cylinder connected to a flow control valve. By controlling the current of the flow control valve and combining them one by one, the flow required for each action can be controlled. The hydraulic device with this structure can reduce the number of flow control valves, thereby reducing the cost of the hydraulic device, reducing the size of the device, and making it easier to arrange in the equipment space.

[0012] 2. Each cylinder in this invention is equipped with a hydraulic lock to effectively prevent oil backflow.

[0013] Third, this utility model adds an overflow valve to the oil circuit to further regulate the flow rate and achieve the purpose of precise flow control. Attached Figure Description

[0014] Figure 1 A schematic diagram of the structure of an existing flow regulation device;

[0015] Figure 2 A schematic diagram of the flow regulating hydraulic device provided by this utility model.

[0016] In the attached diagram: 100, flow regulating hydraulic device; 110, oil cylinder; 111, hydraulic lock; 112, rod chamber oil circuit; 113, rodless chamber oil circuit; 120, directional valve; 130, flow control valve; 140, relief valve. Detailed Implementation

[0017] The present invention will be described in detail below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of the present invention can be combined with each other. For ease of description, the terms "upper," "lower," "left," and "right" appearing below only indicate that they correspond to the upper, lower, left, and right directions in the accompanying drawings and do not limit the structure.

[0018] like Figure 2 As shown, the flow regulating hydraulic device 100 provided in this embodiment includes a cylinder 110, a hydraulic lock 111, a directional valve 120, a flow control valve 130, and a relief valve 140.

[0019] There are multiple hydraulic cylinders 110, each connected to a rod-side hydraulic passage 112 and a rodless-side hydraulic passage 113. Each cylinder 110 has a directional control valve 120 connected to both the rod-side and rodless-side hydraulic passages 112 and 113. All directional control valves 120 are connected to a flow control valve 130. The end of the flow control valve 130 furthest from the directional control valve 120 is connected to an oil tank (not shown). Each cylinder 110 is equipped with a hydraulic lock 111, which is connected to both the rod-side and rodless-side hydraulic passages 112 and 113. A relief valve 140 is also installed on the pipeline connecting the multiple directional control valves 120 to the oil tank. The flow control valve 130 is a proportional flow control valve.

[0020] The flow control valve 130 actuates to connect the oil tank to one or more rod-side oil passages 112 to form an oil inlet passage, while the rodless-side oil passage 113 on the cylinder 110 connected to the rod-side oil passage 112 connects to the oil tank to form a return passage. Alternatively, the flow control valve 130 actuates to connect the oil tank to one or more rodless-side oil passages 113 to form an oil inlet passage, while the rod-side oil passage 112 on the cylinder 110 connected to the rodless-side oil passage 113 forms a return passage.

[0021] Multiple hydraulic cylinders 110 (i.e., actuators) do not need to operate simultaneously. Therefore, when one set of hydraulic cylinders 110 requires flow control, the flow control valve 130 is activated, and the oil circuit from the oil tank sequentially connects to the flow control valve 130, the directional valve 120, and any set of hydraulic cylinders 110, thereby activating that actuator. When another set of hydraulic cylinders 110 needs to operate, the flow control valve 130 is activated again, connecting the oil circuit of the other set of hydraulic cylinders 110. The directional valve 120 can switch between the inlet and outlet oil circuits of the rod-side oil circuit 112 and the rodless-side oil circuit 113.

[0022] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A flow regulating hydraulic device, characterized in that, The system includes a flow control valve (130), multiple hydraulic cylinders (110), and a directional valve (120) corresponding to each of the hydraulic cylinders (110). Each hydraulic cylinder (110) is connected to a rod-side hydraulic passage (112) and a rodless hydraulic passage (113). Each hydraulic cylinder (110) is connected to a directional valve (120) through its rod-side hydraulic passage (112) and rodless hydraulic passage (113). The multiple directional valves (120) are all connected to the flow control valve (130). The end of the flow control valve (130) away from the directional valve (120) is connected to an oil tank. The flow control valve (130) and / or the directional valve (120) are activated to connect the oil tank to one or more rod-side oil passages (112) to form an oil inlet passage, and the rodless oil passage (113) on the cylinder (110) connected to the rod-side oil passage (112) is connected to the oil tank to form a return passage; or, the flow control valve (130) is activated to connect the oil tank to one or more rodless oil passages (113) to form an oil inlet passage, and the rod-side oil passage (112) on the cylinder (110) connected to the rodless oil passage (113) is connected to form a return passage.

2. The flow regulating hydraulic device according to claim 1, characterized in that, Each cylinder (110) is equipped with a hydraulic lock (111), which is connected to the rod chamber oil passage (112) and the rodless chamber oil passage (113).

3. The flow regulating hydraulic device according to claim 1, characterized in that, An overflow valve (140) is also installed on the pipeline connecting the multiple directional valves (120) to the oil tank.

4. The flow regulating hydraulic device according to claim 1, characterized in that, The flow control valve (130) is a proportional flow control valve.

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