Hydraulic control system and control method for turnover plow

Abstract

The invention relates to the technical field of turnover plow hydraulic control, in particular to a turnover plow hydraulic control system and method, and the structure of the turnover plow hydraulic control system comprises a main control valve; the main valve communicates with the main control valve, and a throttling opening is formed in the end of the main valve; the first reversing valve is communicated with the main valve; the second reversing valve is communicated with the main valve; a large cavity of the amplitude modulation oil cylinder is communicated with the second reversing valve, and a small cavity of the amplitude modulation oil cylinder is communicated with the first reversing valve; a large cavity of the overturning oil cylinder is communicated with the first reversing valve, and a small cavity of the overturning oil cylinder is communicated with the second reversing valve; the pilot valve is communicated with the throttling opening of the main valve; the amplitude modulation oil cylinder and the overturning oil cylinder can be locked with each other and act in sequence. According to the hydraulic control system and method for the turnover plow, the problem that an existing turnover plow is complex to control can be solved.

Description

Technical Field

[0001] The present application relates to the technical field of hydraulic control of a reversible plow, and in particular to a reversible plow hydraulic control system and control method. Background Art

[0002] As large-scale plantings are increasingly adopted on arable land, farmers are increasingly demanding higher efficiency and precision in tillage, sowing, and fertilization. Achieving efficient and precise farmland operations has become a pressing technical challenge.

[0003] Currently, the reversible plows on the market are generally cumbersome to operate. To flip the plow from one side to the other, the operator must repeatedly control the hydraulic system. This reduces tillage efficiency, and the reversible plow cannot be set up and moved, hindering the rush to plow and plant during the busy farming season. Summary of the Invention

[0004] In view of this, the purpose of the present application is to provide a hydraulic control system and control method for a reversible plow, so as to solve the problem that the operation of the existing reversible plow is relatively complicated.

[0005] According to a first aspect of the present invention, a hydraulic control system for a reversible plow is provided, wherein the hydraulic control system for the reversible plow includes: a main control valve; a main valve connected to the main control valve, a throttle port being provided at the end of the main valve; a first reversing valve connected to the main valve; a second reversing valve connected to the main valve; an amplitude-modulating cylinder, a large chamber of the amplitude-modulating cylinder being connected to the second reversing valve, and a small chamber of the amplitude-modulating cylinder being connected to the first reversing valve; a flipping cylinder, a large chamber of the flipping cylinder being connected to the first reversing valve, and a small chamber of the flipping cylinder being connected to the second reversing valve; and a pilot valve being connected to the throttle port of the main valve; the amplitude-modulating cylinder and the flipping cylinder being able to lock each other, and the amplitude-modulating cylinder and the flipping cylinder acting in sequence, when the amplitude-modulating cylinder extends to the limit position and the flipping cylinder retracts to the limit position, the pilot valve switches from the second position to the first position, and switches the main valve from the first position to the second position.

[0006] Preferably, when the first reversing valve is in the first position, the first reversing valve is connected to the small chamber of the amplitude modulation oil cylinder and the large chamber of the tilting oil cylinder; when the first reversing valve is in the second position, the first reversing valve is connected to the small chamber of the amplitude modulation oil cylinder; the first reversing valve is provided with a first spring, and under the drive of the first spring, the first reversing valve has a tendency to switch to the first position, and the first reversing valve is provided with a throttle port, and the throttle port is connected to the small chamber of the amplitude modulation oil cylinder. When the amplitude modulation oil cylinder returns oil, the first reversing valve switches from the first position to the second position; When the second reversing valve is in the first position, the second reversing valve is connected to the large chamber of the amplitude modulation cylinder and the small chamber of the flipping cylinder; when the second reversing valve is in the second position, the second reversing valve is connected to the small chamber of the flipping cylinder; the second reversing valve is provided with a second spring, and under the drive of the second spring, the second reversing valve has a tendency to switch to the first position, and the second reversing valve is provided with a throttle port, and the throttle port is connected to the small chamber of the flipping cylinder. When the flipping cylinder returns oil, the second reversing valve switches from the first position to the second position.

[0007] Preferably, the hydraulic control system of the flip plow also includes: a first hydraulic lock, which is arranged between the large chamber of the flip cylinder and the first reversing valve, the first hydraulic lock is connected to the main valve, and when the main valve is in the first position, the first hydraulic lock is opened; a second hydraulic lock, which is arranged between the small chamber of the flip cylinder and the second reversing valve, the second hydraulic lock is connected to the main valve, and when the main valve is in the second position, the second hydraulic lock is opened; a first one-way throttle valve, which is arranged between the first hydraulic lock and the large chamber of the flip cylinder; and a second one-way throttle valve, which is arranged between the second hydraulic lock and the small chamber of the flip cylinder.

[0008] Preferably, when the main valve is in the first position, the second reversing valve, the first hydraulic lock and the pilot valve are connected to the oil supply line of the main valve, and the first reversing valve is connected to the oil return line of the main valve; when the main valve is in the second position, the first reversing valve and the second hydraulic lock are connected to the oil supply line of the main valve, and the second reversing valve is connected to the oil return line of the main valve; the main valve is provided with a third spring, and under the drive of the third spring, the main valve has a tendency to switch to the first position, and when the main valve is in the second position, the throttle of the main valve The flow port is connected to the oil supply circuit of the main valve, forcing the main valve to remain in the second position; when the pilot valve is in the second position, no hydraulic oil flows inside it; when the pilot valve is in the first position, the hydraulic oil can flow through the pilot valve to the throttle port of the main valve, so that the main valve is switched from the first position to the second position; the pilot valve is provided with a fourth spring, and under the drive of the fourth spring, the pilot valve has a tendency to switch to the second position, and the pilot valve is provided with a throttle port, and when the main valve is in the first position, the throttle port is connected to the oil supply circuit of the main valve.

[0009] According to a second aspect of the present invention, a control method for a hydraulic control system of a reversible plow is provided, wherein the hydraulic control system of the reversible plow is the reversible plow hydraulic control system as described above, and the control method for the hydraulic control system of the reversible plow includes: the initial state of the amplitude modulation cylinder is a retracted state, the initial state of the reversing cylinder is an extended state, the main control valve is manipulated to open, then the amplitude modulation cylinder is extended to the extreme position, and then the reversing cylinder is retracted to the extreme position, and then the main valve is switched from the first position to the second position, and then the reversing cylinder is extended to the extreme position, and then the amplitude modulation cylinder is retracted to the extreme position, and finally the main control valve is manipulated to close.

[0010] Preferably, after the main control valve is operated to open, hydraulic oil flows from the main control valve to the main valve, at which time the main valve is in the first position. The hydraulic oil is divided into three paths after passing through the main valve. The first path of hydraulic oil flows to the pilot valve, at which time the pilot valve is in the second position and does not move. The second path of hydraulic oil flows to the first hydraulic lock, so that the first hydraulic lock is opened. The third path of hydraulic oil flows to the second reversing valve, and the second reversing valve is in the first position. After passing through the second reversing valve, the hydraulic oil flows to the large chamber of the amplitude modulation cylinder, forcing the amplitude modulation cylinder to extend. The return oil of the amplitude modulation cylinder flows to the throttle port of the first reversing valve, forcing the first reversing valve to switch from the first position to the second position, and then the return oil flows to the main valve, and finally the return oil flows to the main control valve; when the first reversing valve is switched to the second position, the oil circuit of the large chamber of the tilting cylinder is closed. In this state, the amplitude modulation cylinder extends to the limit position, and the tilting cylinder is in a closed state.

[0011] Preferably, when the amplitude-modulating cylinder is extended to the limit position, the pressure in the small chamber of the amplitude-modulating cylinder drops, and the first reversing valve is switched from the second position to the first position under the action of spring force. After passing through the second reversing valve, the hydraulic oil passes through the second hydraulic lock and the second one-way throttle valve to flow to the small chamber of the flip cylinder, forcing the flip cylinder to retract. The return oil of the flip cylinder passes through the first one-way throttle valve and the first hydraulic lock to reach the first reversing valve in the first position, and then the return oil flows to the main valve, and finally the return oil flows to the main control valve; when the return oil passes through the first one-way throttle valve, the small chamber of the flip cylinder generates pressure and acts on the throttle port of the second reversing valve, forcing the second reversing valve to switch from the first position to the second position, and the oil circuit of the large chamber of the amplitude-modulating cylinder is closed. In this state, the flip cylinder retracts to the limit position, and the amplitude-modulating cylinder is in a closed state.

[0012] Preferably, when the flip cylinder retracts to the extreme position, the pressure in the flip plow hydraulic control system rises to the highest state, and the pilot valve switches from the second position to the first position under the action of pressure. After passing through the pilot valve in the first position, the hydraulic oil acts on the throttle port of the main valve, forcing the main valve to switch from the first position to the second position. Subsequently, the control hydraulic oil of the pilot valve returns through the main valve in the second position, so that the pilot valve switches from the first position to the second position under the action of the spring force.

[0013] Preferably, when the main valve switches from the first position to the second position, the hydraulic oil is divided into three paths after passing through the main valve. The first path of hydraulic oil flows to the second hydraulic lock to open the second hydraulic lock. The second path of hydraulic oil flows to the throttle port of the main valve to force the main valve to remain in the second position. The third path of hydraulic oil flows to the first reversing valve in the first position. After passing through the first reversing valve, the hydraulic oil passes through the first hydraulic lock and the first one-way throttle valve, and finally flows to the large chamber of the tilting cylinder, forcing the tilting cylinder to extend. The return oil from the small chamber of the tilting cylinder passes through the second one-way throttle valve, the second hydraulic lock, and the second reversing valve, and then flows to the main valve and finally flows to the main control valve. When the return oil passes through the second reversing valve, pressure is generated in the small chamber of the tilting cylinder and acts on the throttle port of the second reversing valve, forcing the second reversing valve to switch from the first position to the second position. The oil path of the large chamber of the modulating cylinder is closed. In this state, the tilting cylinder extends to its limit position, and the modulating cylinder is in a closed state.

[0014] Preferably, when the flip cylinder is extended to the extreme position, the pressure in the small chamber of the flip cylinder drops, and the second reversing valve is switched from the second position to the first position under the action of spring force. The hydraulic oil reaches the small chamber of the amplitude modulation cylinder after passing through the first reversing valve in the first position, and the return oil of the large chamber of the amplitude modulation cylinder flows to the main valve through the second reversing valve in the first position, and finally the return oil flows to the main control valve; when the main valve is in the second position, the first hydraulic lock is in a closed state, and the oil circuit of the large chamber of the flip cylinder is closed. In this state, the amplitude modulation cylinder retracts to the extreme position, and the flip cylinder is in a closed state.

[0015] The hydraulic control system and control method of the reversible plow of the embodiment of the present invention are characterized in that the amplitude-modulating cylinder and the reversing cylinder can be locked with each other, so that the amplitude-modulating cylinder and the reversing cylinder can operate in sequence. When the operator operates the main control valve to open, the amplitude-modulating cylinder extends to the limit position, and then the reversing cylinder retracts to the limit position. Then the main valve switches from the first position to the second position, and then the reversing cylinder extends to the limit position, and then the amplitude-modulating cylinder retracts to the limit position. Finally, the operator operates the main control valve to close, thereby realizing the reversible plow from one side to the other. The operator does not need to perform tedious operations during the entire process. It is only necessary to give signals to open and close the main control valve. The movement of the reversible plow is continuous and smooth, which greatly improves the efficiency of the farmland operation. This can effectively solve the problem that the operation of the existing reversible plow is relatively cumbersome.

[0016] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 Schematic diagram of a hydraulic control system for a reversible plow according to the present invention.

[0019] Figure 2 It is a schematic diagram of the extended state of the amplitude modulation cylinder of the hydraulic control system of the reversible plow according to the present invention.

[0020] Figure 3 It is a schematic diagram of the retracted state of the reversing cylinder of the reversing plow hydraulic control system according to the present invention.

[0021] Figure 4This is a schematic diagram of the main valve of the hydraulic control system of the reversible plow according to the present invention when it is switched.

[0022] Figure 5 It is a schematic diagram of the extended state of the turning cylinder of the turning plow hydraulic control system according to the present invention.

[0023] Figure 6 It is a schematic diagram of the retracted state of the amplitude modulation cylinder of the hydraulic control system of the reversible plow according to the present invention.

[0024] Figure 7 It is a schematic diagram of the main control valve of the hydraulic control system of the reversible plow according to the present invention being closed.

[0025] Figure markings: 1-main control valve; 2-main valve; 3-pilot valve; 4-first reversing valve; 5-second reversing valve; 6-second hydraulic lock; 7-second one-way throttle valve; 8-first hydraulic lock; 9-first one-way throttle valve; 10-amplitude modulation cylinder; 11-turning cylinder. DETAILED DESCRIPTION

[0026] The following detailed description is provided to help the reader gain a comprehensive understanding of the methods, devices, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, devices, and / or systems described herein will be apparent upon 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. Rather, except for operations that must occur in a particular order, changes may be made that will be apparent upon understanding the disclosure of this application. Furthermore, descriptions of features known in the art may be omitted for clarity and brevity.

[0027] 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 possible ways to implement the methods, devices, and / or systems described herein that will be apparent upon understanding the disclosure of this application.

[0028] Throughout the specification, when an element (such as a layer, region, or substrate) is described as being “on,” “connected to,” “coupled to,” “over,” or “overlaying” another element, it may be directly “on,” “connected to,” “coupled to,” “over,” or “overlaying” another element, or one or more other elements may be present between them. In contrast, when an element is described as being “directly on,” “directly connected to,” “directly coupled to,” “directly over,” or “directly covering” another element, there may be no other elements intervening therebetween.

[0029] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.

[0030] Although terms such as "first," "second," and "third" may be used herein to describe various members, components, regions, layers, or portions, these members, components, regions, layers, or portions are not limited by these terms. Rather, these terms are used only to distinguish one member, component, region, layer, or portion from another member, component, region, layer, or portion. Thus, a first member, component, region, layer, or portion in the examples described herein may also be referred to as a second member, component, region, layer, or portion without departing from the teachings of the examples.

[0031] For ease of description, spatial relational terms such as "above," "upper," "below," and "lower" may be used herein to describe the relationship of one element to another element as shown in the accompanying drawings. Such spatial relational terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the accompanying drawings. For example, if the device in the accompanying drawings is turned over, an element described as being "above" or "upper" relative to another element would subsequently be "below" or "lower" relative to the other element. Thus, the term "above" includes both the orientations "above" and "below," 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 relational terms used herein will be interpreted accordingly.

[0032] The terms used herein are intended to describe various examples only and are not intended to limit the examples. Unless the context clearly indicates otherwise, the singular form is intended to include the plural form. The terms "include," "comprising," and "having" list the presence of stated features, quantities, operations, components, elements, and / or combinations thereof, but do not preclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0033] Due to manufacturing techniques and / or tolerances, variations in the shapes shown in the drawings may occur. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings but include changes in shapes that occur during manufacturing.

[0034] The features of the examples described herein can be combined in various ways that will be apparent after understanding the disclosure of the present application. In addition, although the examples described herein have various configurations, other configurations are possible as will be apparent after understanding the disclosure of the present application.

[0035] like Figures 1 to 7 As shown, according to the first aspect of the present invention, a reversing plow hydraulic control system is provided, which includes a main control valve 1, a main valve 2, a first reversing valve 4, a second reversing valve 5, an amplitude modulation cylinder 10, a reversing cylinder 11 and a pilot valve 3.

[0036] In the following description, reference will be made to Figures 1 to 7 The specific structures of the above components of the hydraulic control system of the reversible plow and the connection relationships of the above components are described in detail.

[0037] like Figure 1As shown, in the embodiment, the main valve 2 is connected to the main control valve 1. The main control valve 1 can be a tractor main control valve. When the operator operates the main control valve 1 to open it, the main control valve 1 can supply oil to the main valve 2. A throttle port can be provided at the end of the main valve 2 to drive the main valve 2 to change direction. The first reversing valve 4 and the second reversing valve 5 can be connected to the main valve 2 through oil circuits, respectively. The large chamber of the amplitude modulation cylinder 10 can be connected to the second reversing valve 5, and the small chamber of the amplitude modulation cylinder 10 can be connected to the first reversing valve 4. The large chamber of the tilting cylinder 11 can be connected to the first reversing valve 4, and the small chamber of the tilting cylinder 11 can be connected to the second reversing valve 5. The pilot valve 3 can be connected to the throttle port of the main valve 2. The amplitude modulation cylinder 10 and the tilting cylinder 11 can be locked with each other, so that the amplitude modulation cylinder 10 and the tilting cylinder 11 can operate in sequence. When the modulating cylinder 10 extends to its limit and the tilting cylinder 11 retracts to its limit, the pilot valve 3 switches from the second position to the first position, causing the main valve 2 to switch from the first position to the second position. The main valve 2 then remains in the second position, ensuring that the modulating cylinder 10 and the tilting cylinder 11 can complete the complete tilting motion of the tilting plow.

[0038] Preferably, Figure 1 As shown, in the embodiment, the main valve 2, the first reversing valve 4, the second reversing valve 5 and the pilot valve 3 are in the left position as the first position; the main valve 2, the first reversing valve 4, the second reversing valve 5 and the pilot valve 3 are in the right position as the second position.

[0039] Preferably, Figure 1 As shown, in the embodiment, when the first reversing valve 4 is in the first position, the first reversing valve 4 can be connected to the small chamber of the amplitude modulation cylinder 10 and the large chamber of the flip cylinder 11 through the oil circuit. When the first reversing valve 4 is in the second position, the first reversing valve 4 is only connected to the small chamber of the amplitude modulation cylinder 10. The first reversing valve 4 can be provided with a first spring. Driven by the first spring, the first reversing valve 4 has a tendency to switch to the first position. The first reversing valve 4 can also be provided with a throttle port, which is connected to the small chamber of the amplitude modulation cylinder 10. When the amplitude modulation cylinder 10 returns oil, the first reversing valve 4 can be switched from the first position to the second position under the action of pressure.

[0040] Preferably, Figure 1As shown, in the embodiment, when the second reversing valve 5 is in the first position, the second reversing valve 5 can be connected to the large chamber of the amplitude modulation cylinder 10 and the small chamber of the flip cylinder 11 through the oil circuit. When the second reversing valve 5 is in the second position, the second reversing valve 5 is only connected to the small chamber of the flip cylinder 11. The second reversing valve 5 can be provided with a second spring, and under the drive of the second spring, the second reversing valve 5 has a tendency to switch to the first position. The second reversing valve 5 can also be provided with a throttle port, and the throttle port is connected to the small chamber of the flip cylinder 11. When the flip cylinder 11 returns oil, the second reversing valve 5 can be switched from the first position to the second position under the action of pressure.

[0041] Preferably, Figure 1 As shown, in an embodiment, the reversible plow hydraulic control system may further include a first hydraulic lock 8, a second hydraulic lock 6, a first one-way throttle valve 9, and a second one-way throttle valve 7. The first hydraulic lock 8 may be disposed between the large chamber of the reversing cylinder 11 and the first reversing valve 4. The first hydraulic lock 8 may be connected to the main valve 2 via an oil circuit. When the main valve 2 is in the first position, the first hydraulic lock 8 is open. The second hydraulic lock 6 may be disposed between the small chamber of the reversing cylinder 11 and the second reversing valve 5 via an oil circuit. When the main valve 2 is in the second position, the second hydraulic lock 6 is open. The first one-way throttle valve 9 may be disposed between the first hydraulic lock 8 and the large chamber of the reversing cylinder 11. The second one-way throttle valve 7 may be disposed between the second hydraulic lock 6 and the small chamber of the reversing cylinder 11.

[0042] Preferably, Figure 1 As shown, in this embodiment, when the main valve 2 is in the first position, the second reversing valve 5, the first hydraulic lock 8, and the pilot valve 3 can be connected to the oil supply line of the main valve 2, and the first reversing valve 4 is connected to the oil return line of the main valve 2. When the main valve 2 is in the second position, the first reversing valve 4 and the second hydraulic lock 6 can be connected to the oil supply line of the main valve 2, and the second reversing valve 5 can be connected to the oil return line of the main valve 2.

[0043] Preferably, Figure 1 As shown, in this embodiment, the main valve 2 can be provided with a third spring. Driven by the third spring, the main valve 2 tends to switch to the first position. When the main valve 2 is in the second position, the throttle of the main valve 2 can be connected to the oil supply line of the main valve 2, thereby forcing the main valve 2 to remain in the second position. When the main control valve 1 stops supplying oil, the main valve 2 can be driven by the third spring to switch from the second position to the first position.

[0044] Preferably, Figure 1As shown, in the embodiment, when the pilot valve 3 is in the second position, hydraulic oil does not flow therein (i.e., the oil circuit is blocked). When the pilot valve 3 is in the first position, hydraulic oil can flow through the pilot valve 3 to the throttle port of the main valve 2, causing the main valve 2 to switch from the first position to the second position. The pilot valve 3 may be provided with a fourth spring. Driven by the fourth spring, the pilot valve 3 has a tendency to switch to the second position. The pilot valve 3 is also provided with a throttle port, and when the main valve 2 is in the first position, the throttle port is connected to the oil supply circuit of the main valve 2. When the main valve 2 is in the second position, the hydraulic oil can force the pilot valve 3 to remain in the second position.

[0045] During use, the reversible plow hydraulic control system enables the modulating cylinder 10 and the reversing cylinder 11 to operate sequentially. The operator simply opens and closes the main control valve 1 to flip the reversible plow from one side to the other. The main control valve 1 can be manually or electro-hydraulic controlled, enabling convenient and quick remote operation.

[0046] In addition, if Figures 2 to 7 As shown, according to a second aspect of the present invention, a control method for a hydraulic control system for a reversible plow is provided. The reversible plow hydraulic control system is the reversible plow hydraulic control system described above. The control method for the reversible plow hydraulic control system includes: setting the initial state of the modulating cylinder 10 to a retracted state and the initial state of the reversing cylinder 11 to an extended state. In this case, the main control valve 1 is operated to open, and then the modulating cylinder 10 is extended to the limit position; then the reversing cylinder 11 is retracted to the limit position; then the main valve 2 is switched from the first position to the second position; then the reversing cylinder 11 is extended to the limit position; then the modulating cylinder 10 is retracted to the limit position; finally, the main control valve 1 is operated to close. This achieves a cycle, and after the entire operation process is completed, the modulating cylinder 10, the reversing cylinder 11, and each hydraulic valve can return to their initial states.

[0047] Specifically, such as Figure 2As shown in the embodiment, after the main control valve 1 is opened, hydraulic oil flows from the main control valve 1 to the main valve 2, which is now in the first position. After passing through the main valve 2, the hydraulic oil is divided into three paths. The first path of hydraulic oil flows to the pilot valve 3, which is now in the second position and inactive (the oil pressure is insufficient to drive the pilot valve 3 to reverse direction). The second path of hydraulic oil flows to the first hydraulic lock 8, opening it. The third path of hydraulic oil flows to the second reversing valve 5, which is now in the first position. After passing through the second reversing valve 5, the hydraulic oil flows to the large chamber of the amplitude modulation cylinder 10, forcing the amplitude modulation cylinder 10 to extend. The return oil from the amplitude modulation cylinder 10 flows to the throttle of the first reversing valve 4, forcing the first reversing valve 4 to switch from the first position to the second position. The return oil then flows to the main valve 2 and finally to the main control valve 1. When the first reversing valve 4 switches to the second position, the oil circuit to the large chamber of the tilting cylinder 11 is closed. In this state, the amplitude modulation cylinder 10 continues to extend until it reaches the limit position, and the tilting cylinder 11 is in a closed state (ie, the tilting cylinder 11 remains in the extended state and does not move).

[0048] Preferably, Figure 3 As shown, in this embodiment, when the modulating cylinder 10 extends to its limit, the pressure in the small chamber of the modulating cylinder 10 drops, and the first reversing valve 4 switches from the second position to the first position under the action of the spring force. Hydraulic oil flowing out of the main valve 2 passes through the second reversing valve 5, then through the second hydraulic lock 6 and the second one-way throttle valve 7, and then flows to the small chamber of the tilting cylinder 11, forcing the tilting cylinder 11 to retract. Return oil from the tilting cylinder 11 passes through the first one-way throttle valve 9 and the first hydraulic lock 8, and then reaches the first reversing valve 4 in the first position. This return oil then flows to the main valve 2 and finally to the main control valve 1. When this return oil passes through the first one-way throttle valve 9, a higher pressure is generated in the small chamber of the tilting cylinder 11, acting on the throttle opening of the second reversing valve 5, forcing the second reversing valve 5 to switch from the first position to the second position. At this point, the oil circuit to the large chamber of the modulating cylinder 10 is closed. In this state, the tilting cylinder 11 continues to retract until it retracts to the limit position, and the amplitude modulation cylinder 10 is in a closed state (ie, the amplitude modulation cylinder 10 remains in an extended state and does not move).

[0049] Preferably, Figure 4As shown, in the embodiment, when the tilting cylinder 11 is retracted to the extreme position, the oil pressure in the tilting plow hydraulic control system rises to the highest state. At this time, the pilot valve 3 can be switched from the second position to the first position under the action of the oil pressure. After passing through the pilot valve 3 in the first position, the hydraulic oil acts on the throttle port of the main valve 2, forcing the main valve 2 to switch from the first position to the second position. Subsequently, the control hydraulic oil of the pilot valve 3 returns through the main valve 2 in the second position, so that the pilot valve 3 switches from the first position to the second position under the action of the spring force. At the same time, one of the hydraulic oils flowing out of the main valve 2 in the second position can flow to the throttle port of the main valve 2, thereby forcing the main valve 2 to remain in the second position.

[0050] Preferably, Figure 5 As shown in the embodiment, when the main valve 2 switches from the first position to the second position, the hydraulic oil flows through the main valve 2 and is divided into three paths. The first path of hydraulic oil flows to the second hydraulic lock 6, opening it. The second path of hydraulic oil flows to the throttle opening of the main valve 2, forcing the main valve 2 to remain in the second position. The third path of hydraulic oil flows to the first reversing valve 4 in the first position. After passing through the first reversing valve 4, the hydraulic oil passes through the first hydraulic lock 8 and the first one-way throttle valve 9, finally flowing to the large chamber of the tilting cylinder 11, forcing the tilting cylinder 11 to extend. The return oil from the small chamber of the tilting cylinder 11 then flows through the second one-way throttle valve 7, the second hydraulic lock 6, and the second reversing valve 5, then flows to the main valve 2 and finally to the main control valve 1. When the return oil passes through the second reversing valve 5, the small chamber of the tilting cylinder 11 generates a high pressure, which acts on the throttle opening of the second reversing valve 5, forcing the second reversing valve 5 to switch from the first position to the second position. At this point, the oil path to the large chamber of the modulating cylinder 10 is closed. In this state, the tilting cylinder 11 continues to extend until it reaches the limit position, and the amplitude modulation cylinder 10 is in a closed state (ie, the amplitude modulation cylinder 10 remains in the extended state and does not move).

[0051] Preferably, Figure 6 As shown, in the embodiment, when the flip cylinder 11 is extended to the extreme position, the pressure in the small chamber of the flip cylinder 11 drops, and the second reversing valve 5 is switched from the second position to the first position under the action of the spring force. The hydraulic oil flowing out of the main valve 2 reaches the small chamber of the amplitude modulation cylinder 10 after passing through the first reversing valve 4 in the first position. The return oil of the large chamber of the amplitude modulation cylinder 10 flows to the main valve 2 through the second reversing valve 5 in the first position, and finally the return oil flows to the main control valve 1. When the main valve 2 is in the second position, the first hydraulic lock 8 is in a closed state, and the oil circuit of the large chamber of the flip cylinder 11 is closed. In this state, the amplitude modulation cylinder 10 continues to retract until it retracts to the extreme position, and the flip cylinder 11 is in a closed state (that is, the flip cylinder 11 remains extended and does not move).

[0052] Preferably, Figure 7As shown in the embodiment, when the modulating cylinder 10 retracts to its limit position, the operator closes the main control valve 1, which stops supplying oil to the main valve 2. The main valve 2 then returns to its first position under the action of the spring. At this point, the modulating cylinder 10 and the tilting cylinder 11 are also in their initial positions.

[0053] During use, when the operator opens the main control valve 1, the modulating cylinder 10 extends to its limit, then the tilting cylinder 11 retracts to its limit. The main valve 2 then switches from its first position to its second position. The tilting cylinder 11 then extends to its limit, and then the modulating cylinder 10 retracts to its limit. Finally, the operator closes the main control valve 1, thereby achieving the flipping of the plow from one side to the other. The entire process requires no tedious operator manipulation; the operator merely needs to provide signals to open and close the main control valve 1. The plow's smooth and continuous operation significantly improves plowing efficiency.

[0054] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application, rather than to limit them. The scope of protection of the present application is not limited thereto. Although the present application has been described in detail with reference to the above-described embodiments, those skilled in the art should understand that any person skilled in the art can modify or easily conceive of changes to the technical solutions described in the above-described embodiments within the technical scope disclosed in the present application, or perform equivalent replacements for some of the technical features thereof. These modifications, changes, or replacements do not deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application shall be subject to the scope of protection of the claims.

Claims

1. A hydraulic control system for a reversible plow, characterized in that: The hydraulic control system of the reversible plow includes: Main control valve; A main valve is connected to the main control valve, and a throttle port is provided at the end of the main valve; a first reversing valve connected to the main valve; a second reversing valve connected to the main valve; An amplitude modulation oil cylinder, wherein the large chamber of the amplitude modulation oil cylinder is connected to the second reversing valve, and the small chamber of the amplitude modulation oil cylinder is connected to the first reversing valve; a tilting oil cylinder, wherein the large chamber of the tilting oil cylinder is connected to the first reversing valve, and the small chamber of the tilting oil cylinder is connected to the second reversing valve; and a pilot valve connected to the throttle port of the main valve; The amplitude modulation cylinder and the tilting cylinder can be locked with each other, and the amplitude modulation cylinder and the tilting cylinder operate in sequence. When the amplitude modulation cylinder extends to the limit position and the tilting cylinder retracts to the limit position, the pilot valve switches from the second position to the first position, and switches the main valve from the first position to the second position.

2. The hydraulic control system for the reversible plow according to claim 1, characterized in that: When the first reversing valve is in the first position, the first reversing valve is connected to the small chamber of the amplitude modulation oil cylinder and the large chamber of the tilting oil cylinder; When the first reversing valve is in the second position, the first reversing valve is connected to the small chamber of the amplitude modulation cylinder; The first reversing valve is provided with a first spring. Under the drive of the first spring, the first reversing valve has a tendency to switch to the first position. The first reversing valve is provided with a throttle port. The throttle port is connected to the small chamber of the amplitude modulation cylinder. When the amplitude modulation cylinder returns oil, the first reversing valve switches from the first position to the second position. When the second reversing valve is in the first position, the second reversing valve is connected to the large chamber of the amplitude modulation cylinder and the small chamber of the tilting cylinder; When the second reversing valve is in the second position, the second reversing valve is connected to the small chamber of the tilting oil cylinder; The second reversing valve is provided with a second spring. Under the drive of the second spring, the second reversing valve has a tendency to switch to the first position. The second reversing valve is provided with a throttle port, and the throttle port is connected to the small chamber of the flip cylinder. When the flip cylinder returns oil, the second reversing valve switches from the first position to the second position.

3. The hydraulic control system for the reversible plow according to claim 2, characterized in that: The reversible plow hydraulic control system also includes: a first hydraulic lock, disposed between the large chamber of the tilting oil cylinder and the first reversing valve, the first hydraulic lock being connected to the main valve, and being opened when the main valve is in a first position; a second hydraulic lock, disposed between the small chamber of the tilting oil cylinder and the second reversing valve, the second hydraulic lock being connected to the main valve, and being opened when the main valve is in the second position; a first one-way throttle valve, disposed between the first hydraulic lock and the large chamber of the tilting oil cylinder; and The second one-way throttle valve is arranged between the second hydraulic lock and the small chamber of the turning cylinder.

4. The hydraulic control system for the reversible plow according to claim 3, characterized in that: When the main valve is in the first position, the second reversing valve, the first hydraulic lock and the pilot valve are connected to the oil supply line of the main valve, and the first reversing valve is connected to the oil return line of the main valve; When the main valve is in the second position, the first reversing valve and the second hydraulic lock are connected to the oil supply line of the main valve, and the second reversing valve is connected to the oil return line of the main valve; The main valve is provided with a third spring. Under the drive of the third spring, the main valve has a tendency to switch to the first position. When the main valve is in the second position, the throttle port of the main valve is connected to the oil supply passage of the main valve, forcing the main valve to remain in the second position. When the pilot valve is in the second position, no hydraulic oil flows inside the pilot valve; when the pilot valve is in the first position, the hydraulic oil can flow through the pilot valve to the throttle port of the main valve, so that the main valve is switched from the first position to the second position; The pilot valve is provided with a fourth spring. Driven by the fourth spring, the pilot valve has a tendency to switch to the second position. The pilot valve is provided with a throttle port. When the main valve is in the first position, the throttle port is connected to the oil supply path of the main valve.

5. A control method for a hydraulic control system of a reversible plow, characterized in that: The hydraulic control system of the flip plow is the hydraulic control system of the flip plow according to claim 4, and the control method of the hydraulic control system of the flip plow includes: the initial state of the amplitude modulation cylinder is the retracted state, the initial state of the flip cylinder is the extended state, the main control valve is manipulated to open, and then the amplitude modulation cylinder is extended to the limit position, and then the flip cylinder is retracted to the limit position, and then the main valve is switched from the first position to the second position, and then the flip cylinder is extended to the limit position, and then the amplitude modulation cylinder is retracted to the limit position, and finally the main control valve is manipulated to close.

6. The control method of the hydraulic control system of the reversible plow according to claim 5, characterized in that: After the main control valve is operated to open, the hydraulic oil flows from the main control valve to the main valve. At this time, the main valve is in the first position. The hydraulic oil is divided into three paths after passing through the main valve. The first path of hydraulic oil flows to the pilot valve. At this time, the pilot valve is in the second position and does not move. The second path of hydraulic oil flows to the first hydraulic lock to open the first hydraulic lock. The third path of hydraulic oil flows to the second reversing valve. The second reversing valve is in the first position. After passing through the second reversing valve, the hydraulic oil flows to the large chamber of the amplitude modulation cylinder, forcing the amplitude modulation cylinder to extend. The return oil of the amplitude modulation cylinder flows to the throttle port of the first reversing valve, forcing the first reversing valve to switch from the first position to the second position. Then the return oil flows to the main valve, and finally the return oil flows to the main control valve. When the first reversing valve is switched to the second position, the oil circuit of the large chamber of the flip oil cylinder is closed. In this state, the amplitude modulation oil cylinder extends to the limit position, and the flip oil cylinder is in a closed state.

7. The control method of the hydraulic control system of the reversible plow according to claim 5, characterized in that: When the amplitude modulation cylinder is extended to the limit position, the pressure in the small chamber of the amplitude modulation cylinder drops, and the first reversing valve switches from the second position to the first position under the action of the spring force. The hydraulic oil passes through the second reversing valve, and then passes through the second hydraulic lock and the second one-way throttle valve to flow into the small chamber of the tilting cylinder, forcing the tilting cylinder to retract. The return oil of the tilting cylinder passes through the first one-way throttle valve and the first hydraulic lock and reaches the first reversing valve in the first position, and then flows to the main valve, and finally flows to the main control valve; When the return oil passes through the first one-way throttle valve, the small chamber of the flip cylinder generates pressure and acts on the throttle port of the second reversing valve, forcing the second reversing valve to switch from the first position to the second position. The oil circuit of the large chamber of the amplitude modulation cylinder is closed. In this state, the flip cylinder retracts to the extreme position and the amplitude modulation cylinder is in a closed state.

8. The control method of the hydraulic control system of the reversible plow according to claim 5, characterized in that: When the tilting cylinder retracts to the limit position, the pressure in the tilting plow hydraulic control system rises to the highest state, and the pilot valve switches from the second position to the first position under the action of pressure. After passing through the pilot valve in the first position, the hydraulic oil acts on the throttle port of the main valve, forcing the main valve to switch from the first position to the second position. Subsequently, the control hydraulic oil of the pilot valve returns through the main valve in the second position, so that the pilot valve switches from the first position to the second position under the action of the spring force.

9. The control method of the hydraulic control system of the reversible plow according to claim 5, characterized in that: When the main valve is switched from the first position to the second position, the hydraulic oil is divided into three paths after passing through the main valve. The first path of hydraulic oil flows to the second hydraulic lock to open the second hydraulic lock. The second path of hydraulic oil flows to the throttle port of the main valve to force the main valve to remain in the second position. The third path of hydraulic oil flows to the first reversing valve in the first position. After passing through the first reversing valve, the hydraulic oil passes through the first hydraulic lock and the first one-way throttle valve, and finally flows to the large chamber of the tilting cylinder, forcing the tilting cylinder to extend. The return oil of the small chamber of the tilting cylinder flows to the main valve after passing through the second one-way throttle valve, the second hydraulic lock and the second reversing valve, and finally flows to the main control valve. When the return oil passes through the second reversing valve, the small chamber of the flipping cylinder generates pressure and acts on the throttle port of the second reversing valve, forcing the second reversing valve to switch from the first position to the second position. The oil circuit of the large chamber of the amplitude modulation cylinder is closed. In this state, the flipping cylinder extends to the limit position, and the amplitude modulation cylinder is in a closed state.

10. The control method of the hydraulic control system of the reversible plow according to claim 5, characterized in that: When the tilting oil cylinder is extended to the limit position, the pressure in the small chamber of the tilting oil cylinder drops, and the second reversing valve switches from the second position to the first position under the action of the spring force. The hydraulic oil reaches the small chamber of the amplitude modulation oil cylinder after passing through the first reversing valve in the first position. The return oil of the large chamber of the amplitude modulation oil cylinder flows to the main valve through the second reversing valve in the first position, and finally flows to the main control valve. When the main valve is in the second position, the first hydraulic lock is in a closed state, and the oil circuit of the large chamber of the flip cylinder is closed. In this state, the amplitude modulation cylinder retracts to the limit position, and the flip cylinder is in a closed state.

Images