Digital electric control multi-way valve and hydraulic system
By designing a digitally controlled multi-way valve, using a stepper motor to directly drive the valve stem, and integrating lifting and floating valves, the problems of poor control accuracy and large size of existing electronically controlled multi-way valves are solved, achieving precise control and miniaturization.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-05
- Publication Date
- 2026-04-14
AI Technical Summary
Existing electronically controlled multi-way valves have poor output control accuracy, large mechanical inertia, and long response time. Furthermore, the integration of the floating control function into the lifting linkage results in a long stepper motor stroke and large size.
The system employs a digitally controlled multi-way valve, including a neutral position module, a control module, and an output module. The valve stem is directly driven by a stepper motor, and the system integrates a lift valve and a floating valve to achieve precise control. Furthermore, the valve size is reduced by separately setting up the floating valve and the output valve.
It improves control precision, reduces mechanical inertia, shortens response time, and achieves more precise control of lifting, lowering, high pressure, and floating functions, while also making the valve smaller in size.
Smart Images
Figure CN224120460U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of hydraulic system technology, and in particular to a digitally controlled multi-way valve and hydraulic system. Background Technology
[0002] Existing electrically controlled multi-way valves have the following problems: First, the output links of existing electrically controlled multi-way valves are mostly solenoid directional valves, which typically rely on switching signals, resulting in poor control accuracy. The electromagnet drives the valve core, leading to significant mechanical inertia and a long response time. Second, because the lifting link of the electrically controlled multi-way valve uses a stepper motor to drive a gear and rack structure to further drive the valve stem, the floating control function in the existing structure is integrated into the lifting link, resulting in a longer stroke and larger size for the stepper motor during operation.
[0003] Therefore, it is necessary to design a digitally controlled multi-way valve to solve the above problems. Utility Model Content
[0004] In view of this, in order to overcome the shortcomings of the prior art, this utility model provides a digital electronically controlled multi-way valve and hydraulic system, which effectively solves the problems of poor output control accuracy of existing electronically controlled multi-way valves, large mechanical inertia and long response time caused by electromagnet driving valve core movement, as well as the problem that the floating control function of existing electronically controlled multi-way valves is integrated into the lifting link, resulting in a longer stroke and larger size of the stepper motor during the driving process.
[0005] According to a first aspect of this utility model, a digitally controlled multi-way valve is provided, wherein the digitally controlled multi-way valve includes a neutral position module, a control module, and an output module. The neutral position module is connected to the control module and the output module. The control module is connected in parallel with the output module. The neutral position module includes an unloading valve. The control module includes a lift valve and a floating valve. The output module includes an output valve. The lift valve, the floating valve, and the output valve are connected in parallel. The lift valve, the floating valve, and the output valve are connected to the unloading valve. The lift valve and the floating valve are connected to a hydraulic cylinder. The output valve is connected to an actuation unit.
[0006] Preferably, the hydraulic cylinder includes a first chamber and a second chamber. When the hydraulic cylinder is in the lifting state, the lifting valve is in the right position, and the oil flows through the unloading valve and the lifting valve to the first chamber of the hydraulic cylinder. The oil in the second chamber of the hydraulic cylinder flows back to the oil tank.
[0007] Preferably, when the cylinder is in a descending state or a high-pressure state, the lifting valve is in the left position, and the oil flows through the unloading valve and the lifting valve to the second chamber of the cylinder, while the oil in the first chamber of the cylinder flows back to the oil tank.
[0008] Preferably, the control module further includes a pressure holding valve, and the floating valve is connected to the first chamber of the hydraulic cylinder through the pressure holding valve.
[0009] Preferably, when the oil cylinder is in a floating state, the floating valve is in the left position, the pressure holding valve is in the left position, and the oil in the first chamber and the second chamber of the oil cylinder flows back to the oil tank through the left position of the floating valve.
[0010] Preferably, the intermediate module further includes a safety valve, which is connected in parallel with the unloading valve.
[0011] Preferably, there are multiple output valves connected in parallel.
[0012] Preferably, when the digitally controlled multi-way valve is in hydraulic output linkage control, the unloading valve is in the left position, and the output valve is connected to the unloading valve.
[0013] Preferably, when the middle position module is activated, the oil flows back through the right position of the unloading valve; and / or the digital electronically controlled multi-way valve further includes a check valve, and both the lift valve and the output valve are connected to the check valve.
[0014] According to a second aspect of the present invention, a hydraulic system is provided, wherein the hydraulic system includes a digitally controlled multi-way valve as described above.
[0015] According to this utility model, the digitally controlled multi-way valve can be configured such that the valve stem is directly driven by a stepper motor, and it can directly receive digital signals, exhibiting strong anti-interference capabilities. This digitally controlled multi-way valve not only achieves adjustable output flow ratios for any single port but also integrates a lift valve, thereby enabling more precise control of lifting, lowering, high-pressure, or floating functions. The valve's linear motion is directly driven by a stepper motor-driven tap, significantly improving valve core control accuracy. By separately configuring the floating valve, which can be directly driven by a stepper motor, the valve size is reduced. Furthermore, the separate configuration of the lift valve and output valve allows for load maintenance of the working device.
[0016] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description
[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 A schematic diagram of the structure of a digitally controlled multi-way valve according to an embodiment of the present invention is shown.
[0019] Figure reference numerals: 1-Unloading valve; 2-Safety valve; 3-Check valve; 4-First output valve; 5-Second output valve; 6-Lift valve; 7-Floating valve; 8-Pressure holding valve; P-First connecting port; T-Second connecting port; A1-Third connecting port; B1-Fourth connecting port; A2-Fifth connecting port; B2-Sixth connecting port; A3-Seventh connecting port; B3-Eighth connecting port. Detailed Implementation
[0020] The following detailed embodiments are provided to help the reader gain a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will be apparent after understanding the disclosure of this application. For example, the order of operations described herein is merely illustrative and is not limited to the order set forth herein; changes that will be apparent after understanding the disclosure of this application are possible, except for operations that must occur in a specific order. Furthermore, for clarity and brevity, descriptions of features known in the art may be omitted.
[0021] The features described herein may be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many feasible ways of implementing the methods, apparatus, and / or systems described herein that will be apparent upon understanding the disclosure of this application.
[0022] Throughout the specification, when an element (such as a layer, region, or substrate) is described as being "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, it may be directly "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, or there may be one or more other elements in between. In contrast, when an element is described as being "directly on" another element, "directly connected to" another element, "directly bonded to" another element, "directly on" another element, or "directly covering" another element, there may be no other elements in between.
[0023] As used herein, the term “and / or” includes any one of the relevant items listed and any combination of any two or more items.
[0024] Although terms such as “first,” “second,” and “third” may be used herein to describe individual components, assemblies, regions, layers, or parts, these components, assemblies, regions, layers, or parts are not limited by these terms. Rather, these terms are used only to distinguish one component, assembly, region, layer, or part from another. Therefore, without departing from the teachings of the examples described herein, the first component, assembly, region, layer, or part referred to as the second component, assembly, region, layer, or part may also be referred to as the second component, assembly, region, layer, or part.
[0025] For ease of description, spatial relation terms such as “above,” “upper,” “below,” and “lower” are used herein to describe the relationship between one element and another, as shown in the accompanying drawings. Such spatial relation terms are intended to include not only the orientation depicted in the drawings but also different orientations of the device during use or operation. For example, if the device in the drawings is flipped, an element described as being “above” or “upper” relative to another element will subsequently be “below” or “lower” relative to that other element. Therefore, the term “above” includes both “above” and “below” orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relation terms used herein will be interpreted accordingly.
[0026] The terminology used herein is for the purpose of describing various examples only and is not intended to limit the examples. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms “comprising,” “including,” and “having” enumerate the stated features, quantities, operations, components, elements, and / or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.
[0027] Variations in the shapes shown in the accompanying drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the accompanying drawings, but include changes in shape that may occur during manufacturing.
[0028] The features of the examples described herein can be combined in various ways that will be apparent upon understanding the disclosure of this application. Furthermore, although the examples described herein have a wide variety of constructions, other constructions are possible, as will be apparent upon understanding the disclosure of this application.
[0029] According to a first aspect of this utility model, a digitally controlled multi-way valve is provided, such as... Figure 1 As shown, this digitally controlled multi-way valve is used in a hydraulic system to assist in mechanical operations, such as those of a tractor. The digitally controlled multi-way valve includes a neutral position module, a control module, and an output module. In the following description, reference will be made to… Figure 1 This section describes the detailed structure of the center module, control module, and output module of the digital electronically controlled multi-way valve.
[0030] like Figure 1 As shown, in this embodiment, the neutral position module is connected to the control module and the output module. The control module and the output module are connected in parallel. The neutral position module includes an unloading valve 1. Oil flowing from the first connection port P of the oil tank can flow back to the second connection port T through the unloading valve 1, so that the digital electronically controlled multi-way valve remains in the neutral position, allowing the cylinder to stop at any position and the overall system to be in a machine position holding state. The control module includes a lifting valve 6 and a floating valve 7. The lifting valve 6 and the floating valve 7 are connected to the cylinder and the unloading valve 1. When the cylinder performs lifting, lowering, or high-pressure actions, the unloading valve 1 connects to the lifting valve 6 to deliver oil to the cylinder, causing the cylinder to lift. When the cylinder needs to be in a floating state, the unloading valve 1 connects to the floating valve 7 to deliver oil to the cylinder, causing the cylinder to float. The output valve can be connected to other actuators to make these actuators perform work (the actuators can be, for example, commonly used actuators in hydraulic systems, such as hydraulic cylinders and hydraulic motors). The lift valve 6, the float valve 7, and the output valve can be connected in parallel.
[0031] This digitally controlled multi-way valve can be configured with a stepper motor directly driving the valve stem. It can directly receive digital signals and has strong anti-interference capabilities. This digitally controlled multi-way valve not only allows for adjustable output flow ratios for any single port, but also integrates a lift valve 6, thereby achieving more precise control of lifting, lowering, high-pressure, or floating functions. The valve's linear motion is directly driven by a stepper motor-driven tap, significantly improving valve core movement control accuracy. By separately configuring the floating valve 7, which can be directly driven by a stepper motor, the valve size is reduced. The separate configuration of the lift valve 6 and the output valve also enables load maintenance of the working device.
[0032] Preferably, such as Figure 1 As shown, in this embodiment, the hydraulic cylinder can be, for example, a component from the prior art, and may include a first cavity and a second cavity. In this embodiment, the first cavity is connected to the seventh communication port A3, and the second cavity is connected to the eighth communication port B3. When the hydraulic cylinder is in the lifting state, the lifting valve 6 is in the right position. The hydraulic fluid flows through the unloading valve 1 and the lifting valve 6 through the seventh communication port A3 to the first cavity of the hydraulic cylinder, and the hydraulic fluid in the second cavity of the hydraulic cylinder flows back to the oil tank through the eighth communication port B3.
[0033] Preferably, such as Figure 1 As shown in the embodiment, when the oil cylinder is in a descending state or a high-pressure state, the lifting valve 6 is in the left position, and the oil flows through the unloading valve 1 and the lifting valve 6 through the eighth connecting port B3 to the second chamber of the oil cylinder. The oil in the first chamber of the oil cylinder flows back to the oil tank through the seventh connecting port A3.
[0034] Preferably, such as Figure 1 As shown in the embodiment, in order to enable the cylinder to maintain the load, the control module may also include a pressure holding valve 8, and the floating valve 7 is connected to the first cavity of the cylinder through the pressure holding valve 8.
[0035] Preferably, such as Figure 1 As shown, in the embodiment, when the oil cylinder is in a floating state, the floating valve 7 is in the left position, the pressure holding valve 8 is in the left position, and the oil in the first chamber and the oil in the second chamber of the oil cylinder flows back to the oil tank through the left position of the floating valve 7.
[0036] Preferably, such as Figure 1 As shown in the embodiment, in order to limit the maximum system pressure and prevent overpressure from damaging the equipment, the intermediate module also includes a safety valve 2, which is connected in parallel with the unloading valve 1.
[0037] Preferably, such as Figure 1As shown in the embodiment, in order to achieve multiple outputs in the output link, there are multiple output valves connected in parallel. In this embodiment, there are two output valves, namely the first output valve 4 and the second output valve 5, which are connected in parallel. The first output valve 4 is connected to the external actuator through the third connection port A1 and the fourth connection port B1, and the second output valve 5 is connected to the external actuator through the fifth connection port A2 and the sixth connection port B2.
[0038] Preferably, such as Figure 1 As shown, in the embodiment, when the digitally controlled multi-way valve is in hydraulic output linkage control, the unloading valve 1 is in the left position, and the first output valve 4 and / or the second output valve 5 are connected to the unloading valve 1.
[0039] Preferably, such as Figure 1 As shown in the embodiment, when the neutral position module is activated, the oil flows back through the right position of the unloading valve 1. At this time, the valve cores of the pressure holding valve 8 and the lift valve 6 are in the O-type functional state, and the hydraulic cylinder can be held in any position.
[0040] Preferably, such as Figure 1 As shown, in this embodiment, the digitally controlled multi-way valve may further include a check valve 3, with the lift valve 6, the first output valve 4, and the second output valve 5 all connected to the check valve 3. By designing a separate pressure-holding valve 8 for the lift valve 6 and setting a check valve 3 for the output valves, the load of the working device can be maintained.
[0041] like Figure 1 As shown, the digitally controlled multi-way valve can include a neutral position, a raised position, a lowered high-pressure position, a floating position, and a hydraulic output linkage control position. The specific implementation methods for these positions are as follows:
[0042] In the neutral position: all valves are de-energized, and the oil flows back to the tank through the right-hand position of the unloading valve 1. At this time, the valve cores of the pressure holding valve 8 and the lift valve 6 are in the O-type functional state, and the oil cylinder can be held in any position.
[0043] When in the lifting state, unloading valve 1 is energized, pressure holding valve 8 is energized and operates in the left position. The left-position operation of unloading valve 1 closes the second connecting port T. Lifting valve 6 is energized, and the stepper motor (not shown) drives the valve core of lifting valve 6 to the right position. The other valves are not energized. Oil enters the cylinder through the right position of lifting valve 6. Oil from the first connecting port P enters the first chamber of the cylinder through the seventh connecting port A3, and oil in the second chamber of the cylinder flows back to the second connecting port T through the eighth connecting port B3. The stepper motor can control the opening size of lifting valve 6, thereby adjusting the lifting speed of the cylinder.
[0044] In the descent or high-pressure state, unloading valve 1 is energized, pressure holding valve 8 is energized and operates in the left position, unloading valve 1 closes the second connecting port T, lifting valve 6 is energized, and the stepper motor drives the valve core of lifting valve 6 to the left position, while the other valves are not energized. Oil enters the cylinder through the left position of lifting valve 6. Oil from the first connecting port P enters the second chamber of the cylinder through the eighth connecting port B3, and oil from the first chamber of the cylinder enters the second connecting port T through the seventh connecting port A3. The stepper motor can control the opening size of lifting valve 6, thereby adjusting the descent speed of the cylinder.
[0045] When in a floating state, the floating valve 7 is energized and operates in the left position, the pressure holding valve 8 is energized in the left position, and the other valves are not energized. The oil in the cylinder flows back to the second connection port T through the seventh connection port A3 and the eighth connection port B3 via the left position of the floating valve 7, thereby realizing floating control.
[0046] In the hydraulic output control state: Unloading valve 1 is energized and operates in the left position, closing the second connection port T; lifting valve 6, floating valve 7, and pressure holding valve 8 are not energized. When the first output valve 4 or the second output valve 5 is energized, hydraulic fluid enters the third connection port A1, the fourth connection port B1, the fifth connection port A2, or the sixth connection port B2 for flow output. During output, depending on the action requirements of the actuator, the first output valve 4 or the second output valve 5 can be in the left or right position, and the hydraulic fluid can be output through the third connection port A1, the fourth connection port B1, the fifth connection port A2, or the sixth connection port B2 via different right-hand paths.
[0047] This digitally controlled multi-way valve can be configured with a stepper motor directly driving the valve stem. It can directly receive digital signals and has strong anti-interference capabilities. This digitally controlled multi-way valve not only allows for adjustable output flow ratios for any single port, but also integrates a lift valve, thereby achieving more precise control of lifting, lowering, high-pressure, or floating functions. The valve's linear motion is directly driven by a stepper motor-driven tap, significantly improving valve core control accuracy. By separately configuring the floating valve, which can be directly driven by a stepper motor, the valve size is reduced. Furthermore, the separate configuration of the lift valve and output valve allows for load maintenance of the working device.
[0048] Furthermore, according to a second aspect of the present invention, a hydraulic system is provided, the hydraulic system comprising the digitally controlled multi-way valve as described above.
[0049] Finally, it should be noted that the above-described embodiments are merely specific implementations of this application, used to illustrate the technical solutions of this application, and not to limit them. The protection scope of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the technical scope disclosed in this application. Such modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be covered within the protection scope of this application. Therefore, the protection scope of this application should be determined by the protection scope of the claims.
Claims
1. A digitally controlled multi-way valve, characterized in that, The digital electronically controlled multi-way valve includes a neutral position module, a control module, and an output module. The neutral position module is connected to the control module and the output module. The control module is connected in parallel with the output module. The neutral position module includes an unloading valve. The control module includes a lift valve and a float valve. The output module includes an output valve. The lift valve, the float valve, and the output valve are connected in parallel. The lift valve, the float valve, and the output valve are connected to the unloading valve. The lift valve and the float valve are connected to a hydraulic cylinder. The output valve is connected to an actuation unit.
2. The digitally controlled multi-way valve according to claim 1, characterized in that, The hydraulic cylinder includes a first chamber and a second chamber. When the hydraulic cylinder is in the lifting state, the lifting valve is in the right position, and the oil flows through the unloading valve and the lifting valve to the first chamber of the hydraulic cylinder. The oil in the second chamber of the hydraulic cylinder flows back to the oil tank.
3. The digitally controlled multi-way valve according to claim 2, characterized in that, When the cylinder is in a descending or high-pressure state, the lifting valve is in the left position, and the oil flows through the unloading valve and the lifting valve to the second chamber of the cylinder, while the oil in the first chamber of the cylinder flows back to the oil tank.
4. The digitally controlled multi-way valve according to claim 2, characterized in that, The control module also includes a pressure holding valve, and the floating valve is connected to the first chamber of the oil cylinder through the pressure holding valve.
5. The digitally controlled multi-way valve according to claim 4, characterized in that, When the oil cylinder is in a floating state, the floating valve is in the left position, the pressure holding valve is in the left position, and the oil in the first chamber and the second chamber of the oil cylinder flows back to the oil tank through the left position of the floating valve.
6. The digitally controlled multi-way valve according to claim 2, characterized in that, The intermediate module also includes a safety valve, which is connected in parallel with the unloading valve.
7. The digitally controlled multi-way valve according to claim 1, characterized in that, The number of output valves is multiple, and the multiple output valves are connected in parallel.
8. The digitally controlled multi-way valve according to claim 7, characterized in that, When the digitally controlled multi-way valve is in hydraulic output linkage control, the unloading valve is in the left position, and the output valve is connected to the unloading valve.
9. The digitally controlled multi-way valve according to claim 7, characterized in that, When the middle position module is activated, the oil flows back through the right position of the unloading valve; and / or The digital electronically controlled multi-way valve also includes a check valve, and both the lift valve and the output valve are connected to the check valve.
10. A hydraulic system, characterized in that, The hydraulic system includes the digitally controlled multi-way valve as described in any one of claims 1 to 9.