Hydraulic control system for a sprayer boom

Abstract

The application relates to the technical field of agricultural machinery equipment, in particular to a spraying machine spraying rod hydraulic control system which comprises an oil supply mechanism, is provided with a first connecting port and a second connecting port, a first extension valve, a first retraction valve, a first control valve and a first driving cylinder, the first extension valve is connected with the first connecting port, the first retraction valve is connected with the second connecting port, the first driving cylinder is connected with the first control valve, and the first extension valve and the first retraction valve are connected with the first control valve; a second extension valve, a second retraction valve, a second control valve and a second driving cylinder, the second extension valve is connected with the first connecting port, the second retraction valve is connected with the second connecting port, the second driving cylinder is connected with the second control valve, and the second extension valve and the second retraction valve are connected with the second control valve. The spraying machine spraying rod hydraulic control system can realize independent work of spraying rods on both sides of a spraying machine, can also drive the spraying rods on both sides to work synchronously, and can realize various operation modes.

Description

Technical Field

[0001] This application relates to the field of agricultural machinery and equipment technology, and in particular to a hydraulic control system for a sprayer boom. Background Technology

[0002] With the increasing adoption of large-scale farming, the demand for large agricultural machinery is growing, especially for crop spraying. As a result, various types of sprayers have emerged on the market to mechanize the spraying process. The spray boom, a crucial component of the sprayer, typically needs to be able to unfold or fold. Most existing sprayers use a synchronous folding or unfolding drive for both sides of the boom, resulting in a limited operating mode and preventing unilateral spraying. Some sprayers use separate control systems for each side of the boom, but this undoubtedly increases the complexity of the hydraulic circuitry and raises costs. Furthermore, it hinders synchronization when it's necessary for both booms to move synchronously. Utility Model Content

[0003] The purpose of this application is to provide a hydraulic control system for a sprayer boom, which can, to a certain extent, solve the technical problem in the prior art that the sprayer boom drive system has a single working mode and is difficult to take into account both single-sided operation and synchronous operation.

[0004] This application provides a hydraulic control system for a sprayer boom, including: an oil supply mechanism, wherein the oil supply mechanism is provided with a first connection port and a second connection port, and when one of the first connection port and the second connection port is an oil supply port, the other is an oil return port;

[0005] The first spray bar mechanism includes: a first extension valve and a first retraction valve, the first extension valve being connected to the first connection port and the first retraction valve being connected to the second connection port; the first spray bar mechanism also includes a first control valve and a first drive cylinder, the first drive cylinder being connected to the first control valve, and the first extension valve and the first retraction valve being respectively connected to the first control valve.

[0006] The second spray boom mechanism includes a second extension valve and a second retraction valve. The second extension valve is connected to the first connection port, and the second retraction valve is connected to the second connection port. The second spray boom mechanism also includes a second control valve and a second drive cylinder. The second drive cylinder is connected to the second control valve, and the second extension valve and the second retraction valve are respectively connected to the second control valve.

[0007] In the above technical solution, further, the fuel tank;

[0008] The oil supply line and the oil return line are respectively connected to the oil tank;

[0009] The main control valve is connected to the oil supply line and the oil return line, respectively.

[0010] The main control valve includes a valve core and multiple valve positions, and the valve core can switch positions among the multiple valve positions; the main control valve is connected to the first connection port and the second connection port.

[0011] In any of the above technical solutions, the first control valve is further provided with a first interface and a second interface, the first interface being connected to the first extension valve and the second interface being connected to the first retraction valve.

[0012] The second control valve is provided with interface one and interface two. Interface one is connected to the second extension valve, and interface two is connected to the second retraction valve.

[0013] In any of the above technical solutions, the first control valve further includes:

[0014] A first pipeline, one end of which is connected to the first extension valve, and the other end of which is connected to the first drive cylinder; the first pipeline is equipped with a first hydraulically controlled check valve.

[0015] The second pipeline has one end connected to the first retraction valve and the other end connected to the first drive cylinder; the second pipeline is equipped with a second hydraulic control check valve.

[0016] In any of the above technical solutions, the second control valve further includes:

[0017] The third pipeline has one end connected to the second extension valve and the other end connected to the second drive cylinder; the third pipeline is equipped with a third hydraulic check valve.

[0018] The fourth pipeline has one end connected to the second retraction valve and the other end connected to the second drive cylinder; the fourth pipeline is equipped with a fourth hydraulic control check valve.

[0019] In any of the above technical solutions, the hydraulic control system of the sprayer boom further includes an overload valve, wherein the overload valve is provided between the first pipeline and the second pipeline; and another overload valve is provided between the third pipeline and the fourth pipeline.

[0020] In any of the above technical solutions, the number of the first drive cylinders is at least two, and all the first drive cylinders are respectively connected to the first control valve;

[0021] The number of the second drive cylinders is at least two, and all of the second drive cylinders are connected to the second control valve.

[0022] In any of the above technical solutions, the hydraulic control system of the sprayer boom further includes multiple flow valves, and each of the first drive cylinders and the first control valves and each of the second drive cylinders and the second control valves is provided with a flow valve.

[0023] In any of the above technical solutions, the first pipeline is further connected to the large cavity of all the first drive cylinders; the second pipeline is connected to the small cavity of all the first drive cylinders.

[0024] The third pipeline is connected to the large chamber of all the second drive cylinders, and the fourth pipeline is connected to the small chamber of all the second drive cylinders.

[0025] In any of the above technical solutions, the hydraulic control system for the sprayer boom further includes:

[0026] The first branch is connected to the first connection port and is simultaneously connected to the first extension valve and the second extension valve.

[0027] The second branch is connected to the second connection port and is also connected to the first retraction valve and the second retraction valve.

[0028] Compared with the prior art, the beneficial effects of this application are as follows:

[0029] The hydraulic control system for the spray boom of the sprayer provided in this application includes: an oil supply mechanism, which is provided with a first connection port and a second connection port, wherein when one of the first connection port and the second connection port is the oil supply port, the other is the oil return port; a first spray boom mechanism, which includes: a first extension valve and a first retraction valve, wherein the first extension valve is connected to the first connection port and the first retraction valve is connected to the second connection port; the first spray boom mechanism further includes a first control valve and a first drive cylinder, wherein the first drive cylinder is connected to the first control valve, and the first extension valve and the first retraction valve are respectively connected to the first control valve; a second spray boom mechanism includes a second extension valve and a second retraction valve, wherein the second extension valve is connected to the first connection port and the second retraction valve is connected to the second connection port; the second spray boom mechanism further includes a second control valve and a second drive cylinder, wherein the second drive cylinder is connected to the second control valve, and the second extension valve and the second retraction valve are respectively connected to the second control valve.

[0030] The hydraulic control system for the sprayer boom provided in this application can drive the two spray booms on both sides of the sprayer to work independently or synchronously, realizing multiple operating modes, enriching the functions of the sprayer, and helping to improve operating efficiency and product competitiveness. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0032] Figure 1 A schematic diagram of the initial state oil circuit of the hydraulic control system for the spray boom of a sprayer provided in an embodiment of this application;

[0033] Figure 2 A schematic diagram of the hydraulic circuit for the extended state of the right spray boom cylinder of a sprayer, provided in an embodiment of this application;

[0034] Figure 3 A schematic diagram of the hydraulic circuit of the right spray boom cylinder in the retracted state of the spray boom hydraulic control system provided in this application embodiment;

[0035] Figure 4 A schematic diagram of the hydraulic circuit for the left and right boom cylinders of a sprayer hydraulic control system provided in this application embodiment, showing the simultaneous extension of the boom cylinders.

[0036] Figure 5 This is a schematic diagram of the hydraulic circuit for the left and right boom cylinders of the sprayer boom hydraulic control system provided in this application embodiment, showing the simultaneous retraction of both cylinders.

[0037] Figure label:

[0038] 1-Oil tank, 2-Oil pump, 3-Return oil filter, 4-Safety valve, 5-Main control valve, 501-First valve position, 502-Second valve position, 503-Third valve position, a-First power-on connection terminal, b-Second power-on connection terminal, c-First connection port, d-Second connection port, 6-First extension valve, 7-First retraction valve, 8-First drive cylinder I, 9-First drive cylinder II, 10-First hydraulic check valve, 11-Second hydraulic check valve, 12-First flow valve, 13-Second flow valve, 14-Overload valve, 15-Second 16 - Second retraction valve, 17 - Second drive cylinder I, 18 - Second drive cylinder II, 19 - Third hydraulic check valve, 20 - Fourth hydraulic check valve, 21 - First branch, 22 - Second branch, M - First control valve, A - First interface, B - Second interface, A1 - Third interface, A2 - Fourth interface, B1 - Fifth interface, B2 - Sixth interface, N - Second control valve, A' - Interface 1, B' - Interface 2, A1' - Interface 3, A2' - Interface 4, B1' - Interface 5, B2' - Interface 6. Detailed Implementation

[0039] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.

[0040] The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application.

[0041] Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0042] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0043] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0044] The following reference Figures 1 to 5 The present application describes a hydraulic control system for a sprayer boom.

[0045] See Figures 1 to 5 As shown, an embodiment of this application provides a hydraulic control system for a sprayer boom. This hydraulic control system includes an oil supply mechanism, a first boom mechanism, and a second boom mechanism. The first boom mechanism drives the right boom of the sprayer, and the second boom mechanism drives the left boom. The first and second boom mechanisms are respectively connected to the oil supply mechanism, enabling the oil supply mechanism to supply hydraulic oil to the first and second boom mechanisms to drive the left boom and / or the right boom.

[0046] Specifically, the oil supply mechanism includes: an oil tank 1, an oil supply line, and an oil return line. The oil supply line and the oil return line are respectively connected to the oil tank 1. An oil pump 2 is installed on the oil supply line, and an oil return filter 3 is installed on the oil return line. The oil supply mechanism also includes a main control valve 5, which is specifically a solenoid valve, preferably a three-position four-way solenoid valve. The main control valve 5 includes a valve core, a first valve position 501, a second valve position 502, and a third valve position 503. The main control valve 5 is provided with a first power-on connection terminal a and a second power-on connection terminal b. By switching the on / off state of the first power-on connection terminal a and the second power-on connection terminal b, the valve core can switch positions between the first valve position 501, the second valve position 502, and the third valve position 503. The main control valve 5 is also provided with a first connection port c and a second connection port d. When the valve core of the main control valve 5 is in the first valve position 501, hydraulic oil flows out of the first connection port c. At this time, the first connection port c is the oil supply port, and hydraulic oil flows into the second connection port d. The second connection port d is the oil return port. When the valve core of the main control valve 5 is in the third valve position 503, hydraulic oil flows out of the second connection port d. At this time, the second connection port d is the oil supply port, and hydraulic oil flows into the first connection port c. The first connection port c is the oil return port.

[0047] Preferably, the oil supply mechanism further includes a safety valve 4, which is connected to both the oil supply line and the return line. The connection point of the safety valve 4 to the oil supply line is located on the oil outlet side of the oil pump 2. A pressure gauge is installed at the connection point of the safety valve 4 and the oil supply line. When the pressure gauge reaches the preset value, the safety valve 4 is opened to divert the oil supply, allowing some hydraulic oil to flow to the return line, thereby limiting the maximum pressure of the oil supply and preventing excessive hydraulic oil pressure.

[0048] Furthermore, the first spray boom mechanism includes a first extension valve 6 and a first retraction valve 7. Preferably, both the first extension valve 6 and the first retraction valve 7 are two-position solenoid valves. The first spray boom mechanism also includes a first control valve M and a first drive cylinder. The first extension valve 6 and the first retraction valve 7 are respectively connected to the first control valve M. The first control valve M is also connected to the first drive cylinder. The first drive cylinder is used to connect the right spray boom of the sprayer. As the action state of the first drive cylinder changes, the folding or extension state of the right spray boom of the sprayer can be changed.

[0049] Preferably, there are two first drive cylinders, which have the same structure and are designated as first drive cylinder I8 and first drive cylinder II9. Taking first drive cylinder I8 as an example, it includes a first cylinder body and a first lever passing through the first cylinder body. The first lever can extend or retract relative to the first cylinder body. A plunger is provided at one end of the first lever located inside the first cylinder body, and the plunger divides the internal space of the first cylinder body into independent large and small chambers. Preferably, first drive cylinder I8 is the forearm cylinder of the right spray boom of the sprayer, and first drive cylinder II9 is ​​the boom cylinder of the right spray boom of the sprayer.

[0050] The first control valve M is provided with a first interface A and a second interface B. The first interface A is connected to the first extension valve 6, and the second interface B is connected to the first retraction valve 7. The first control valve M is also provided with a third interface A1, a fourth interface A2, a fifth interface B1, and a sixth interface B2. The third interface A1 is connected to the large chamber of the first drive cylinder, the fourth interface A2 is connected to the large chamber of the second drive cylinder, the fifth interface B1 is connected to the small chamber of the first drive cylinder I8, and the sixth interface B2 is connected to the small chamber of the first drive cylinder II9.

[0051] The first control valve M specifically includes: a first pipeline and a second pipeline. One end of the first pipeline is connected to the first interface A, and the other end of the first pipeline is connected to the third interface A1 and the fourth interface A2 respectively. One end of the second pipeline is connected to the second interface B, and the other end of the second pipeline is connected to the fifth interface B1 and the sixth interface B2.

[0052] The first control valve M further includes a first hydraulically controlled check valve 10 and a second hydraulically controlled check valve 11. The first hydraulically controlled check valve 10 is disposed in the first pipeline, and the second hydraulically controlled check valve 11 is disposed in the second pipeline. Preferably, the first control valve M further includes an overload valve 14, which is connected to both the first pipeline and the second pipeline.

[0053] The first control valve M also includes a first flow valve 12 and a second flow valve 13. A first flow valve 12 is installed between the third interface A1 and the port of the first pipeline, and between the fourth interface A2 and the port of the first pipeline. A second flow valve 13 is installed between the fifth interface B1 and the port of the second pipeline, and between the sixth interface B2 and the port of the second pipeline. Each first flow valve 12 and second flow valve 13 can adjust and set the oil flow rate to the first extension valve 6 or the first retraction valve 7, thereby setting the extension speed of the first drive cylinder I 8 and the first drive cylinder II 9. It should be noted that the number of first drive cylinders can be increased. When the number of first drive cylinders increases, the number of interfaces of the first control valve M for connecting to the increased number of first drive cylinders and the number of first flow valves 12 can be increased accordingly.

[0054] The second spray boom mechanism includes: a second extension valve 15, a second retraction valve 16, a second control valve N, and a second drive cylinder. The second extension valve 15 and the second retraction valve 16 are respectively connected to the second control valve N, and the second control valve N is also connected to the second drive cylinder. The second drive cylinder is used to connect the left spray boom of the sprayer.

[0055] There are two second drive cylinders, and the two second drive cylinders have the same structure. The specific structure of the second drive cylinder can be referred to the specific structure of the first drive cylinder, which can be fully understood by those skilled in the art. The two second drive cylinders are second drive cylinder I 17 and second drive cylinder II 18. Preferably, second drive cylinder I 17 is the small arm cylinder of the left spray boom of the sprayer, and second drive cylinder II 18 is the large arm cylinder of the left spray boom of the sprayer.

[0056] The second control valve N is provided with interface A', interface B', interface A1', interface A2', interface B1', and interface B2'. Interface A' is connected to the second extension valve 15, interface B' is connected to the second retraction valve 16, interface A1' is connected to the large chamber of the second drive cylinder I 17, interface A2' is connected to the large chamber of the second drive cylinder II 18, interface B1' is connected to the small chamber of the second drive cylinder I 17, and interface B2' is connected to the small chamber of the second drive cylinder II 18.

[0057] The second control valve N specifically includes: a third pipeline, a fourth pipeline, a third hydraulic control check valve 19, and a fourth hydraulic control check valve 20. In addition, a first flow valve 12 and a second flow valve 13 are provided. The structure of the second control valve N is compatible with the structure of the first control valve M. The specific structure and connection relationship of the second control valve N can be referred to the above description of the first control valve M. Those skilled in the art can fully understand this, and it will not be repeated here.

[0058] Furthermore, the hydraulic control system of the sprayer boom also includes a first branch 21 and a second branch 22. The first branch 21 is connected to the first connection port c, one end of the first branch 21 is connected to the first extension valve 6, and the other end of the first branch 21 is connected to the second extension valve 15. The second branch 22 is connected to the second connection port d, one end of the second branch 22 is connected to the first retraction valve 7, and the other end of the second branch 22 is connected to the second retraction valve 16.

[0059] Preferably, the hydraulic control system for the sprayer boom also includes a control system (not shown in the figure). The control system includes at least a controller, a wireless transmission module, and a touch screen. The touch screen and the wireless transmission module are connected to the controller. The main control valve 5, the first extension valve 6, the first retraction valve 7, the first hydraulic control check valve 10, the second hydraulic control check valve 11, the second extension valve 15, the second retraction valve 16, the third hydraulic control check valve 19, the fourth hydraulic control check valve 20, and multiple flow valves are all wirelessly connected to the controller via the wireless transmission module. This allows the touch screen to control each valve, enabling remote operation of the hydraulic control system for the sprayer boom. The control system can be installed in the driver's cab or on a computer or other terminal device, allowing the operator to control it from outside the vehicle.

[0060] The hydraulic control system for the spray boom of this sprayer can achieve the following states:

[0061] (I) Initial state:

[0062] like Figure 1 As shown, the first extension valve 6, the second extension valve 15, the first retraction valve 7, and the second retraction valve 16 are not energized and are all in the closed state. The main control valve 5 is also not energized. The valve core of the main control valve 5 is in the second valve position 502. The oil pump 2 delivers hydraulic oil from the oil tank 1 to the main control valve 5. The hydraulic oil flows back to the return oil filter 3 through the second valve position 502 and finally circulates back to the oil tank 1. In this state, the left spray bar and the right spray bar of the sprayer are both in the locked state.

[0063] (II) The right spray boom cylinder of the sprayer is extended:

[0064] like Figure 2As shown, the second energized connection terminal b of the main control valve 5 is energized, as are the first extension valve 6 and the first retraction valve 7. After the second energized connection terminal b of the main control valve 5 is energized, the valve core of the main control valve 5 moves to the first valve position 501. The hydraulic oil output by the oil pump 2 flows through the second valve position 502 to the left oil passage of the first extension valve 6, and then flows to the first control valve M. After passing through the first hydraulically controlled check valve 10, the hydraulic oil is delivered to the large chambers of the first drive cylinder I 8 and the first drive cylinder II 9 respectively through the two first flow valves 12. Both the first drive cylinder I 8 and the first drive cylinder II 9 extend outward. At the same time, the hydraulic oil in the small chambers of the first drive cylinder I 8 and the first drive cylinder II 9 flows into the first control valve M through the second flow valve 13, and then flows through the second hydraulically controlled check valve 11 to the right oil passage of the first retraction valve 7, and finally flows back to the oil tank 1 through the first valve position 501 of the main control valve 5.

[0065] (III) The extended state of the left spray boom cylinder of the sprayer:

[0066] Based on the same principle as the extended state of the right spray boom cylinder of the sprayer in state (II) above, the second extension valve 15 and the second retraction valve 16 are energized, and the valve core of the main control valve 5 is in the first valve position 501, so that the second drive cylinder I 17 and the second drive cylinder II 18 can be extended, which can be fully understood by those skilled in the art.

[0067] (iv) Right spray boom cylinder retracted state of the sprayer:

[0068] like Figure 3 As shown, the first energized connection a of the main control valve 5 is energized, as are the first extension valve 6 and the first retraction valve 7. When the first energized connection a of the main control valve 5 is energized, the valve core of the main control valve 5 moves to the third valve position 503. The hydraulic oil output by the oil pump 2 flows through the third valve position 503 to the right oil passage of the first retraction valve 7. Subsequently, the hydraulic oil flows into the first control valve M. The hydraulic oil flows through the second hydraulic check valve 11 and the second flow valve 13 to the small chambers of the first drive cylinder I8 and the first drive cylinder II9, respectively. Both the first drive cylinder I8 and the first drive cylinder II9 retract inward. At the same time, the hydraulic oil in the large chambers of the first drive cylinder I8 and the first drive cylinder II9 flows through the first flow valve 12 and the first hydraulic check valve 10 to the left oil passage of the first extension valve 6, and then flows back to the oil tank 1 through the third valve position 503 of the main control valve 5.

[0069] (V) Right spray bar cylinder retraction state:

[0070] Based on the same principle as the extended state of the right spray boom cylinder of the sprayer in state (IV) above, the second extension valve 15 and the second retraction valve 16 are energized, and the valve core of the main control valve 5 is in the third valve position 503, so that the second drive cylinder I 17 and the second drive cylinder II 18 can be retracted, which can be fully understood by those skilled in the art.

[0071] (vi) Simultaneous extension of the left and right spray bar cylinders:

[0072] like Figure 4 As shown, the second energized connection terminal b of the main control valve 5 is energized, and the first extension valve 6, the first retraction valve 7, the second extension valve 15, and the second retraction valve 16 are all energized. When the second power-on connection terminal b of the main control valve 5 is powered on, the valve core of the main control valve 5 moves to the first valve position 501. The hydraulic oil output by the oil pump 2 flows to the left oil passage of the first extension valve 6 and the left oil passage of the second extension valve 15 after passing through the third valve position 503. Then the hydraulic oil flows into the first control valve M and the second control valve N. The hydraulic oil flows into the large chamber of the first drive cylinder I 8, the large chamber of the first drive cylinder II 9, the large chamber of the second drive cylinder I 17 and the large chamber of the second drive cylinder II 18 respectively through the first hydraulic control check valve 10, the third hydraulic control check valve 19 and the first flow valve 12, causing each drive cylinder to extend. At the same time, the hydraulic oil in the small chamber of each drive cylinder flows to the right oil passage of the first retraction valve 7 and the right oil passage of the second retraction valve 16 through the second flow valve 13, the second hydraulic control check valve 11 and the fourth hydraulic control check valve 20. After the hydraulic oil flows into the main control valve 5, it flows back to the oil tank 1.

[0073] (vii) Simultaneous retraction of the left and right spray bar cylinders:

[0074] like Figure 5 As shown, the first energized connection terminal a of the main control valve 5 is energized, and the first extension valve 6, the first retraction valve 7, the second extension valve 15, and the second retraction valve 16 are all energized. At this time, the valve core of the main control valve 5 is in the third valve position 503. The hydraulic oil output by the oil pump 2 flows through the third valve position 503 to the right oil passage of the first retraction valve 7 and the right oil passage of the second retraction valve 16, respectively, and then flows to the first control valve M and the second control valve N. Subsequently, the hydraulic oil flows through the second hydraulic control check valve 11, the fourth hydraulic control check valve 20, and each of the second flow valves 13 to the small chambers of the two second drive cylinders. All four drive cylinders retract inward. At the same time, the hydraulic oil in the large chambers of the four drive cylinders flows through the first flow valve 12, the first hydraulic control check valve 10, and the third hydraulic control check valve 19 to the left oil passage of the first extension valve 6 and the left oil passage of the second extension valve 15, respectively. Finally, the hydraulic oil flows back to the oil tank 1 through the third valve position 503.

[0075] In summary, the hydraulic control system for the sprayer boom provided in this application can drive the two spray booms on both sides of the sprayer to work independently or synchronously, realizing multiple operating modes, enriching the functions of the sprayer, and helping to improve operating efficiency and product competitiveness.

[0076] Furthermore, the hydraulic control system for the sprayer boom provided in this embodiment uses the same oil supply mechanism for the first and second boom mechanisms, which saves some oil circuitry and helps control costs.

[0077] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A hydraulic control system for a sprayer boom, characterized in that, include: The oil supply mechanism is provided with a first connection port and a second connection port. When one of the first connection port and the second connection port is the oil supply port, the other is the oil return port. The first spray bar mechanism includes: a first extension valve and a first retraction valve, the first extension valve being connected to the first connection port and the first retraction valve being connected to the second connection port; the first spray bar mechanism also includes a first control valve and a first drive cylinder, the first drive cylinder being connected to the first control valve, and the first extension valve and the first retraction valve being respectively connected to the first control valve. The second spray boom mechanism includes a second extension valve and a second retraction valve. The second extension valve is connected to the first connection port, and the second retraction valve is connected to the second connection port. The second spray boom mechanism also includes a second control valve and a second drive cylinder. The second drive cylinder is connected to the second control valve, and the second extension valve and the second retraction valve are respectively connected to the second control valve.

2. The hydraulic control system for the spray boom of the sprayer according to claim 1, characterized in that, The oil supply mechanism includes: tank; The oil supply line and the oil return line are respectively connected to the oil tank; The main control valve is connected to the oil supply line and the oil return line, respectively. The main control valve includes a valve core and multiple valve positions, and the valve core can switch positions among the multiple valve positions; the main control valve is connected to the first connection port and the second connection port.

3. The hydraulic control system for the spray boom of the sprayer according to claim 1, characterized in that, The first control valve is provided with a first interface and a second interface. The first interface is connected to the first extension valve, and the second interface is connected to the first retraction valve. The second control valve is provided with interface one and interface two. Interface one is connected to the second extension valve, and interface two is connected to the second retraction valve.

4. The hydraulic control system for the spray boom of the sprayer according to claim 1, characterized in that, The first control valve includes: A first pipeline, one end of which is connected to the first extension valve, and the other end of which is connected to the first drive cylinder; the first pipeline is equipped with a first hydraulically controlled check valve. The second pipeline has one end connected to the first retraction valve and the other end connected to the first drive cylinder; the second pipeline is equipped with a second hydraulic control check valve.

5. The hydraulic control system for the spray boom of the sprayer according to claim 4, characterized in that, The second control valve includes: The third pipeline has one end connected to the second extension valve and the other end connected to the second drive cylinder; the third pipeline is equipped with a third hydraulic check valve. The fourth pipeline has one end connected to the second retraction valve and the other end connected to the second drive cylinder; the fourth pipeline is equipped with a fourth hydraulic control check valve.

6. The hydraulic control system for the spray boom of a sprayer according to claim 5, characterized in that, The hydraulic control system for the sprayer boom also includes an overload valve, which is provided between the first pipeline and the second pipeline; another overload valve is provided between the third pipeline and the fourth pipeline.

7. The hydraulic control system for the spray boom of a sprayer according to claim 1, characterized in that, The number of the first drive cylinders is at least two, and all of the first drive cylinders are connected to the first control valve respectively; The number of the second drive cylinders is at least two, and all of the second drive cylinders are connected to the second control valve.

8. The hydraulic control system for the spray boom of a sprayer according to claim 7, characterized in that, The hydraulic control system for the sprayer boom also includes multiple flow valves, with each of the first drive cylinders and the first control valve, as well as each of the second drive cylinders and the second control valve, being equipped with a flow valve.

9. The hydraulic control system for the spray boom of a sprayer according to claim 5, characterized in that, The first pipeline is connected to the large chamber of all the first drive cylinders; the second pipeline is connected to the small chamber of all the first drive cylinders. The third pipeline is connected to the large chamber of all the second drive cylinders, and the fourth pipeline is connected to the small chamber of all the second drive cylinders.

10. The hydraulic control system for the spray boom of a sprayer according to any one of claims 1 to 9, characterized in that, The hydraulic control system for the sprayer boom also includes: The first branch is connected to the first connection port and is simultaneously connected to the first extension valve and the second extension valve. The second branch is connected to the second connection port and is also connected to the first retraction valve and the second retraction valve.

Images