boom extension components, spray assembly control system, spray assembly and sprayer

Abstract

This invention discloses a boom extension element, a spray assembly control system, a spray assembly, and a sprayer. The boom extension element includes a first multi-way valve and a first hydraulic cylinder. The first multi-way valve is a three-position four-way valve with an oil inlet, an oil outlet, and two working oil ports. The first hydraulic cylinder is a double-acting cylinder with a large-cavity oil port and a small-cavity oil port. A first hydraulic lock is provided at each of the two working oil ports of the first multi-way valve, and the pilot oil port of each first hydraulic lock is connected to the other working oil port of the first multi-way valve. A first throttle valve is provided at the large-cavity oil port of the first hydraulic cylinder, and a second throttle valve is provided at the small-cavity oil port of the first hydraulic cylinder. The first throttle valve and the second throttle valve are respectively connected to the two first hydraulic locks. By setting the first hydraulic lock, the first hydraulic cylinder can remain stable in any state of extension and retraction. By setting the first throttle valve and the second throttle valve, the first hydraulic cylinder can extend and retract slowly and smoothly, with good stability.

Description

Technical Field

[0001] This invention belongs to the field of sprayer technology, and particularly relates to boom extension elements, spray assembly control system, spray assembly and sprayer. Background Technology

[0002] For wheeled sprayers, the spray assembly has spray racks on both sides, and the spray rack has a mounting frame, a boom, and a forearm. The boom and forearm can be rotated to extend or retract on the mounting frame, and the mounting frame itself also has a floating function. Currently, the boom and forearm of the spray assembly are driven to extend or retract by hydraulic cylinders. Of course, the floating function of the mounting frame itself is also driven by a contouring hydraulic cylinder. However, the transmission hydraulic circuit only considers driving the hydraulic cylinder to extend and retract, but ignores the impact force generated by the hydraulic cylinder during the extension and retraction process. A large impact force can easily lead to equipment damage and affect the driving experience and operability of the sprayer. Summary of the Invention

[0003] In order to solve the above-mentioned technical problems, one of the objectives of the present invention is to provide a boom deployment element with a simple structure and good stability when the boom is deployed.

[0004] To achieve the above objectives, the technical solution of the present invention is as follows: A boom deployment element includes a first multi-way valve and a first hydraulic cylinder. The first multi-way valve is a three-position four-way valve, which has an oil inlet, an oil outlet, and two working oil ports. The first hydraulic cylinder is a double-acting hydraulic cylinder, which has a large-cavity oil port and a small-cavity oil port. A first hydraulic lock is provided at each of the two working oil ports of the first multi-way valve, and each pilot oil port of the first hydraulic lock is connected to the other working oil port of the first multi-way valve. A first throttle valve is provided at the large-cavity oil port of the first hydraulic cylinder, and a second throttle valve is provided at the small-cavity oil port of the first hydraulic cylinder. The first throttle valve and the second throttle valve are respectively connected to the two first hydraulic locks.

[0005] The beneficial effects of the above technical solution are as follows: by setting a first hydraulic lock, the first oil cylinder can remain stable in any state of extension and retraction; and by setting a first throttle valve and a second throttle valve, the first oil cylinder can extend and retract slowly and smoothly, with good stability.

[0006] In the above technical solution, a first check valve is connected in parallel at the second throttle valve, and the first check valve supplies hydraulic oil to the first cylinder via the first multi-way valve.

[0007] The beneficial effect of the above technical solution is that it makes the first oil cylinder retract more smoothly and quickly.

[0008] In the above technical solution, there are two first hydraulic cylinders. The first throttle valve is provided at the large and small oil ports of the two first hydraulic cylinders and is respectively connected to the corresponding first hydraulic lock.

[0009] The beneficial effect of the above technical solution is that it enables the two first hydraulic cylinders to drive the boom to extend or retract together.

[0010] The above technical solution also includes two shuttle valves and two first relief valves. The two working ports of the first multi-way valve are the first working port and the second working port, respectively. The large chamber port of the first cylinder is connected to the first working port, and the small chamber port of the first cylinder is connected to the second working port. The large chamber ports of the two first cylinders are respectively connected to the ports at both ends of one of the shuttle valves, and the small chamber ports of the two first cylinders are respectively connected to the ports at both ends of the other shuttle valve. The two first relief valves correspond one-to-one with the two shuttle valves, and the middle port of each shuttle valve is connected to the second working port through the corresponding first relief valve.

[0011] The beneficial effect of the above technical solution is that it makes the extension and retraction of the two first oil cylinders more synchronized.

[0012] The second objective of this invention is to provide a spray assembly control system that is simple in structure and easy to operate.

[0013] To achieve the above objectives, another technical solution of the present invention is as follows: a spray assembly control system, comprising an oil supply line, an oil return line, a second oil cylinder, a second multi-way valve, and a boom deployment element as described above. The second oil cylinder is a double-acting oil cylinder, and the second multi-way valve is a three-position four-way valve. The oil inlets of the first and second multi-way valves are both connected to the oil supply line, and the oil outlets of the first and second multi-way valves are both connected to the oil return line. A second hydraulic lock is respectively provided at the two working oil ports of the second multi-way valve. The large chamber oil port and the small chamber oil port of the second oil cylinder are respectively connected to the two second hydraulic locks, and a third throttle valve is provided at the large chamber oil port of the second oil cylinder. The pilot oil port of each second hydraulic lock is respectively connected to the other working oil port of the second multi-way valve.

[0014] The beneficial effect of the above technical solution is that it allows the forearm to be smoothly extended by the second multi-way valve and the second hydraulic cylinder.

[0015] In the above technical solution, a fourth throttle valve is also provided at the large cavity oil port and the small cavity oil port of the second oil cylinder, and a second check valve is connected in parallel at each of the fourth throttle valves. The second check valve only allows hydraulic oil to flow from the second multi-way valve to the second oil cylinder.

[0016] The beneficial effect of the above technical solution is that it makes the second cylinder contract more smoothly and with greater force.

[0017] The above technical solution also includes a third hydraulic cylinder and a third multi-way valve. The third hydraulic cylinder is a double-acting hydraulic cylinder, and the third multi-way valve is a three-position four-way valve. The oil inlet of the third multi-way valve is connected to the oil supply pipeline, and the oil outlet of the third multi-way valve is connected to the oil return pipeline. The small chamber oil port of the third hydraulic cylinder is connected to the working oil port of the third multi-way valve, and a third hydraulic lock is provided at the connection. The pilot oil port of the third hydraulic lock is connected to another working oil port of the third multi-way valve, and the large chamber oil port of the third hydraulic cylinder is connected to another working oil port of the third multi-way valve. A third check valve and a fifth throttle valve are sequentially provided at the connection. The third check valve only allows hydraulic oil to flow from the third multi-way valve to the third hydraulic cylinder, and the large chamber oil port of the third hydraulic cylinder is connected to the oil return pipeline through a second relief valve.

[0018] The beneficial effects of the above technical solution are as follows: it enables the third cylinder to extend slowly and smoothly, and at the same time, the large cavity oil port of the third cylinder is connected to the return oil pipeline through the second overflow valve, so that the large cavity of the third cylinder can always maintain a back pressure state, and avoid the third cylinder from stalling when contracting.

[0019] In the above technical solution, a fourth check valve and a sixth throttle valve are connected in parallel at the small cavity oil port of the third oil cylinder. The fourth check valve only allows hydraulic oil to flow from the third multi-way valve to the third oil cylinder.

[0020] The beneficial effect of the above technical solution is that when the third cylinder contracts, the oil supply in its small cavity is smoother and has greater pressure.

[0021] The third objective of this invention is to provide a spray assembly that is simple in structure and has good controllability.

[0022] To achieve the above objectives, another technical solution of the present invention is as follows: a spray assembly, including the spray assembly control system as described above.

[0023] The advantages of the above technical solution are: it has a simple structure and good control stability, and can drive the boom and forearm to extend or retract at the same time, while also adjusting the mounting frame to maintain a stable state.

[0024] The fourth objective of this invention is to provide a sprayer with a simple structure and good operability.

[0025] To achieve the above objectives, another technical solution of the present invention is as follows: a sprayer, comprising the spray assembly as described above.

[0026] The advantages of the above technical solution are that its spray assembly is easy to operate and has good stability during operation. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the hydraulic circuit of the boom extension element described in Embodiment 1 of the present invention;

[0028] Figure 2 This is a schematic diagram of the hydraulic circuit when there are two first cylinders in Embodiment 1 of the present invention;

[0029] Figure 3 This is a schematic diagram of the hydraulic circuit in Embodiment 1 of the present invention, showing how the two first cylinders can always maintain a synchronized state.

[0030] Figure 4 This is a schematic diagram of the hydraulic circuit of the forearm deployment element described in Embodiment 2 of the present invention;

[0031] Figure 5 This is a schematic diagram of the hydraulic circuit of the mounting bracket control element described in Embodiment 3 of the present invention;

[0032] Figure 6 This is a schematic diagram of the hydraulic circuit of the spray assembly control system described in Embodiment 4 of the present invention.

[0033] In the diagram: 1. Boom extension element; 11. First multi-way valve; 12. First hydraulic cylinder; 13. First hydraulic lock; 14. First throttle valve; 15. Second throttle valve; 16. First check valve; 17. Shuttle valve; 18. First relief valve; 2. Oil supply line; 3. Oil return line; 4. Arm extension element; 41. Second hydraulic cylinder; 42. Second multi-way valve; 43. Second hydraulic lock; 44. Third throttle valve; 45. Fourth throttle valve; 46. Second check valve; 5. Mounting bracket control element; 51. Third hydraulic cylinder; 52. Third multi-way valve; 53. Third hydraulic lock; 54. Third check valve; 55. Fifth throttle valve; 56. Fourth check valve; 57. Sixth throttle valve; 58. Second relief valve; 6. Oil tank; 7. Oil supply pump. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Furthermore, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present invention and are not intended to limit the present invention. In the present invention, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0035] Example 1

[0036] like Figure 1 As shown, this embodiment provides a boom extension component, including a first multi-way valve 11 and a first hydraulic cylinder 12. The first multi-way valve 11 is a three-position four-way valve with an inlet, an outlet, and two working ports. The first hydraulic cylinder 12 is a double-acting cylinder with a large-cavity port and a small-cavity port. A first hydraulic lock 13 is provided at each of the two working ports of the first multi-way valve 11, and the pilot port of each first hydraulic lock 13 is connected to the other working port of the first multi-way valve 11. A first throttle valve 14 is provided at the large-cavity port of the first hydraulic cylinder 12, and a second throttle valve 15 is provided at the small-cavity port of the first hydraulic cylinder 12. The first throttle valve 14 and the second throttle valve 15 are respectively connected to the two first hydraulic locks 13. By setting the first hydraulic lock, the first hydraulic cylinder can remain stable in any state of extension and retraction. By setting the first throttle valve and the second throttle valve, the first hydraulic cylinder can extend and retract slowly and smoothly, with good stability.

[0037] In the above technical solution, a first check valve 16 is connected in parallel to the second throttle valve 15, and the first check valve 16 supplies hydraulic oil to the first cylinder 12 via the first multi-way valve 11, thus enabling the first cylinder to contract more smoothly and quickly. In this embodiment, the second throttle valve 15 and the first check valve 16 form a one-way throttle valve.

[0038] like Figure 2 As shown, in the above technical solution, there are two first hydraulic cylinders 12. The first throttle valve 14 is provided at the large and small oil ports of the two first hydraulic cylinders 12 and is connected to the corresponding first hydraulic lock 13, so that the two first hydraulic cylinders work together to drive the boom to extend or retract.

[0039] like Figure 3As shown, the above technical solution also includes two shuttle valves 17 and two first overflow valves 18. The two working ports of the first multi-way valve 11 are the first working port and the second working port, respectively. The large chamber port of the first cylinder 12 is connected to the first working port, and the small chamber port of the first cylinder 12 is connected to the second working port. The large chamber ports of the two first cylinders 12 are respectively connected to the ports at both ends of one of the shuttle valves 17, and the small chamber ports of the two first cylinders 12 are respectively connected to the ports at both ends of the other shuttle valve 17. The two first overflow valves 18 correspond one-to-one with the two shuttle valves 17. The middle port of each shuttle valve 17 is connected to the second working port through the corresponding first overflow valve 18, thus ensuring good synchronization of the extension and retraction of the two first cylinders.

[0040] In this embodiment, when the first multi-way valve is in the left position, the first cylinder extends; when it is in the right position, the first cylinder retracts; and when it is in the middle position, the first cylinder is in a pressure-holding state.

[0041] For a double-acting hydraulic cylinder, the large chamber port is the port that connects to the rodless chamber (large chamber) of the double-acting hydraulic cylinder, while the small chamber port is the port that connects to the rod chamber (small chamber) of the double-acting hydraulic cylinder.

[0042] Example 2

[0043] like Figure 4 As shown, this embodiment provides a forearm deployment element, including a second hydraulic cylinder 41 and a second multi-way valve 42. The second hydraulic cylinder 41 is a double-acting hydraulic cylinder, and the second multi-way valve 42 is a three-position four-way valve. A second hydraulic lock 43 is respectively provided at the two working ports of the second multi-way valve 42. The large and small chamber ports of the second hydraulic cylinder 41 are respectively connected to the two second hydraulic locks 43, and a third throttle valve 44 is provided at the large chamber port of the second hydraulic cylinder 41. The pilot port of each second hydraulic lock 43 is respectively connected to the other working port of the second multi-way valve 42, so that the forearm can also be driven by the second multi-way valve and the second hydraulic cylinder to deploy smoothly.

[0044] In the above technical solution, a fourth throttle valve 45 is respectively provided at the large and small oil ports of the second cylinder 41, and a second check valve 46 is connected in parallel to each of the fourth throttle valves 45. The second check valve 46 only allows hydraulic oil to flow from the second multi-way valve 42 to the second cylinder 41, thus making the second cylinder more smoothly contracted and with a greater force. In this embodiment, the fourth throttle valve 45 and the corresponding second check valve 46 form a one-way throttle valve.

[0045] Example 3

[0046] like Figure 5As shown, this embodiment provides a mounting bracket control element, including a third hydraulic cylinder 51 (i.e., a contouring cylinder) and a third multi-way valve 52. The third hydraulic cylinder 51 is a double-acting cylinder, and the third multi-way valve 52 is a three-position four-way valve. The small chamber port of the third hydraulic cylinder 51 is connected to the working port of the third multi-way valve 52, and a third hydraulic lock 53 is provided at the connection point. The pilot port of the third hydraulic lock 53 is connected to another working port of the third multi-way valve 52, and the large chamber port of the third hydraulic cylinder 51 is connected to the other working port of the third multi-way valve 52. Another working oil port is connected, and a third check valve 54 and a fifth throttle valve 55 are sequentially installed at the connection point. The third check valve 54 only allows hydraulic oil to flow from the third multi-way valve 52 to the third cylinder 51, and the large chamber oil port of the third cylinder 51 is equipped with a second relief valve to discharge oil outward. This allows the third cylinder to maintain a slow and stable extension. At the same time, the large chamber oil port of the third cylinder is connected to the return oil line through the second relief valve, so that the large chamber of the third cylinder can always maintain a back pressure state and avoid the third cylinder from stalling when retracting.

[0047] In the above technical solution, a fourth check valve 56 and a sixth throttle valve 57 are connected in parallel at the small cavity oil port of the third cylinder 51. The fourth check valve 56 only allows hydraulic oil to flow from the third multi-way valve 52 to the third cylinder 51, thus making the oil supply in the small cavity of the third cylinder smoother and having greater pressure when it contracts. In this embodiment, the fourth check valve 56 and the sixth throttle valve 57 form a one-way throttle valve.

[0048] Example 4

[0049] like Figure 6 As shown, this embodiment provides a spray assembly control system, including an oil supply line 2, an oil return line 3, a boom deployment element 1 as described in Embodiment 1, a forearm deployment element 4 as described in Embodiment 2, and a mounting bracket control element 5 as described in Embodiment 3. The oil inlets of the first multi-way valve 11, the second multi-way valve 42, and the third multi-way valve 52 are all connected to the oil supply line 2, and the oil outlets of the first multi-way valve 11, the second multi-way valve 42, the third multi-way valve 52, and the second overflow valve 58 are all connected to the oil return line 3. Of course, this embodiment may also include an oil tank 6 and an oil supply pump 7. The oil return line is connected to the oil tank 6, and the oil supply line is connected to the oil tank via the oil supply pump, which provides the power to deliver oil to the oil supply line.

[0050] Example 5

[0051] This embodiment provides a spray assembly, including the spray assembly control system as described in Embodiment 4. It has a simple structure and good operation stability. It can simultaneously drive the boom and forearm to extend or retract, and can also adjust the mounting bracket to maintain a stable state.

[0052] Example 6

[0053] This embodiment provides a sprayer, including the spray assembly as described in Embodiment 5, which is easy to operate and has good stability during operation.

[0054] In this embodiment Figures 1-5 In the diagram, P represents the inlet of the three-position four-way valve, and T represents the outlet of the three-position four-way valve.

[0055] The embodiments of the present invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A boom extension element, characterized in that, The first multi-way valve (11) and the first cylinder (12) are included. The first multi-way valve (11) is a three-position four-way valve with an inlet, an outlet and two working ports. The first cylinder (12) is a double-acting cylinder with a large chamber port and a small chamber port. The two working ports of the first multi-way valve (11) are each provided with a first hydraulic lock (13). The pilot port of each first hydraulic lock (13) is connected to the other working port of the first multi-way valve (11). The large chamber port of the first cylinder (12) is provided with a first throttle valve (14). The small chamber port of the first cylinder (12) is provided with a second throttle valve (15). The first throttle valve (14) and the second throttle valve (15) are respectively connected to the two first hydraulic locks (13). A first check valve (16) is connected in parallel at the second throttle valve (15), and the first check valve (16) supplies hydraulic oil to the first cylinder (12) via the first multi-way valve (11); There are two first oil cylinders (12). The large and small oil ports of the two first oil cylinders (12) are equipped with the first throttle valve (14) and are respectively connected to the corresponding first hydraulic lock (13). It also includes two shuttle valves (17) and two first overflow valves (18). The two working ports of the first multi-way valve (11) are the first working port and the second working port, respectively. The large chamber port of the first cylinder (12) is connected to the first working port, and the small chamber port of the first cylinder (12) is connected to the second working port. The large chamber ports of the two first cylinders (12) are respectively connected to the ports at both ends of one of the shuttle valves (17), and the small chamber ports of the two first cylinders (12) are respectively connected to the ports at both ends of the other shuttle valve (17). The two first overflow valves (18) correspond one-to-one with the two shuttle valves (17). The middle port of each shuttle valve (17) is connected to the second working port through the corresponding first overflow valve (18).

2. A spray assembly control system, characterized in that, The system includes an oil supply line (2), a return line (3), a second cylinder (41), a second multi-way valve (42), and a boom deployment element (1) as described in claim 1. The second cylinder (41) is a double-acting cylinder, and the second multi-way valve (42) is a three-position four-way valve. The oil inlets of the first multi-way valve (11) and the second multi-way valve (42) are connected to the oil supply line (2), and the oil outlets of the first multi-way valve (11) and the second multi-way valve (42) are connected to the return line (3). The two working ports of the second multi-way valve (42) are respectively provided with second hydraulic locks (43). The large and small chamber ports of the second cylinder (41) are respectively connected to the two second hydraulic locks (43), and the large chamber port of the second cylinder (41) is provided with a third throttle valve (44). The pilot port of each second hydraulic lock (43) is respectively connected to the other working port of the second multi-way valve (42).

3. The spray assembly control system according to claim 2, characterized in that, The second cylinder (41) is also provided with a fourth throttle valve (45) at the large cavity oil port and the small cavity oil port, and a second check valve (46) is connected in parallel at each of the fourth throttle valves (45). The second check valve (46) only allows hydraulic oil to flow from the second multi-way valve (42) to the second cylinder (41).

4. The spray assembly control system according to claim 2 or 3, characterized in that, It also includes a third hydraulic cylinder (51) and a third multi-way valve (52). The third hydraulic cylinder (51) is a double-acting hydraulic cylinder, and the third multi-way valve (52) is a three-position four-way valve. The oil inlet of the third multi-way valve (52) is connected to the oil supply pipeline (2), and the oil outlet of the third multi-way valve (52) is connected to the oil return pipeline (3). The small cavity oil port of the third hydraulic cylinder (51) is connected to the working oil port of the third multi-way valve (52), and a third hydraulic lock (53) is provided at the connection point. The pilot port of the third cylinder (51) is connected to another working port of the third multi-way valve (52), and the large chamber port of the third cylinder (51) is connected to another working port of the third multi-way valve (52). A third check valve (54) and a fifth throttle valve (55) are sequentially arranged at the connection point. The third check valve (54) only allows hydraulic oil to flow from the third multi-way valve (52) to the third cylinder (51), and the large chamber port of the third cylinder (51) is connected to the return oil pipeline (3) through the second relief valve (58).

5. The spray assembly control system according to claim 4, characterized in that, The third cylinder (51) has a fourth check valve (56) and a sixth throttle valve (57) connected in parallel at the small cavity oil port. The fourth check valve (56) only allows hydraulic oil to flow from the third multi-way valve (52) to the third cylinder (51).

6. A spray assembly, characterized in that, Includes the spray assembly control system as described in any one of claims 2-5.

7. A sprayer, characterized in that, Includes the spray assembly as described in claim 6.

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