Large arm unfolding element, spraying assembly control system, spraying assembly and spraying machine

Abstract

The invention discloses a large arm unfolding element, a spraying assembly control system, a spraying assembly and a spraying machine, the large arm unfolding element comprises a first multi-way valve and a first oil cylinder, the first multi-way valve is a three-position four-way valve and is provided with an oil inlet, an oil outlet and two working oil ports, the first oil cylinder is a double-acting oil cylinder and is provided with a large-cavity oil port and a small-cavity oil port, and the large-cavity oil port and the small-cavity oil port are communicated. First hydraulic locks are arranged at two working oil ports of the first multi-way valve, a pilot oil port of each first hydraulic lock is communicated with the other working oil port of the first multi-way valve, a first throttling valve is arranged at a large-cavity oil port of the first oil cylinder, and a second throttling valve is arranged at a small-cavity oil port of the first oil cylinder. The first throttle valve and the second throttle valve are communicated with the two first hydraulic locks respectively, the first hydraulic locks are arranged, so that the first oil cylinder can be kept stable when stretching out and drawing back to any state, the first throttle valve and the second throttle valve are arranged, the first oil cylinder stretches out and draws back slowly and stably when stretching out and drawing back, and stability of the first oil cylinder is good.

Description

Technical Field

[0001] The invention belongs to the technical field of sprayers, and in particular relates to a large arm deployment element, a spray assembly control system, a spray assembly and a sprayer. Background Art

[0002] For wheel sprayers, there are spray racks on both sides of the spray assembly, and the spray racks have mounting frames, booms and forearms, and both the booms and forearms can be swung to expand or store on the mounting frames, and the mounting frames themselves also have floating functions. At present, the booms and forearms of the spray assembly are driven by hydraulic cylinders to expand or store. Of course, the floating function of the mounting frame itself is also driven by a contoured cylinder, and the transmission hydraulic oil circuit only considers driving the hydraulic cylinder to extend and retract, while ignoring the impact force generated by the hydraulic cylinder during the extension and retraction process. A large impact force is likely to cause equipment damage, while affecting the driving experience and maneuverability of the sprayer. Summary of the invention

[0003] In order to solve the above 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] In order to achieve the above-mentioned purpose, the technical scheme of the present invention is as follows: a boom deployment element, comprising a first multi-way valve and a first oil cylinder, the first multi-way valve being a three-position four-way valve, having an oil inlet, an oil outlet and two working oil ports, the first oil cylinder being a double-acting oil cylinder, having a large-cavity oil port and a small-cavity oil port, a first hydraulic lock being arranged at the two working oil ports of the first multi-way valve, and each of the first hydraulic lock pilot oil ports is connected to another working oil port of the first multi-way valve, a first throttle valve being arranged at the large-cavity oil port of the first oil cylinder, a second throttle valve being arranged at the small-cavity oil port of the first oil cylinder, and the first throttle valve and the second throttle valve being respectively connected to the two first hydraulic locks.

[0005] The beneficial effect of the above technical solution is that by setting the first hydraulic lock, the first oil cylinder can remain stable when it is extended or retracted to any state, and by setting the first throttle valve and the second throttle valve, the first oil cylinder can be extended or retracted slowly and smoothly, and its stability is good.

[0006] In the above technical solution, a first one-way valve is connected in parallel to the second throttle valve, and the first one-way valve is used to supply hydraulic oil to flow to the first oil cylinder through the first multi-way valve.

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

[0008] In the above technical solution, two first oil cylinders are provided, and the first throttle valves are provided at the large chamber oil port and the small chamber oil port of the two first oil cylinders and are respectively connected to the corresponding first hydraulic locks.

[0009] The beneficial effect of the above technical solution is that the two first oil cylinders can drive the boom to be unfolded or retracted together.

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

[0011] The beneficial effect of the above technical solution is that the synchronization of the extension and retraction of the two first oil cylinders is improved.

[0012] A second object of the present invention is to provide a spray assembly control system that is simple in structure and easy to operate.

[0013] In order to achieve the above-mentioned purpose, another technical solution of the present invention is as follows: a spray assembly control system, comprising an oil supply pipeline, an oil return pipeline, a second oil cylinder, a second multi-way valve and the boom deployment element as described above, the second oil cylinder is a double-acting oil cylinder, the second multi-way valve is a three-position four-way valve, the oil inlets of the first multi-way valve and the second multi-way valve are both connected to the oil supply pipeline, the oil outlets of the first multi-way valve and the second multi-way valve are both connected to the oil return pipeline, second hydraulic locks are respectively arranged 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 arranged at the large chamber oil port of the second oil cylinder, and the pilot oil port of each of the second hydraulic locks is respectively connected to another working oil port of the second multi-way valve.

[0014] The beneficial effect of the above technical solution is that the forearm can also be driven by the second multi-way valve and the second oil cylinder to be smoothly deployed.

[0015] In the above technical solution, fourth throttle valves are respectively provided at the large chamber oil port and the small chamber oil port of the second oil cylinder, and a second one-way valve is connected in parallel at the fourth throttle valve, and the second one-way 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 oil cylinder contract more smoothly and with greater force.

[0017] The above technical scheme also includes a third oil cylinder and a third multi-way valve, the third oil cylinder is a double-acting oil cylinder, 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, the oil outlet of the third multi-way valve is connected to the oil return pipeline, the small chamber oil port of the third oil cylinder is connected to the working oil port of the third multi-way valve, and a third hydraulic lock is arranged at the connecting point, the pilot oil port of the third hydraulic lock is connected to another working oil port of the third multi-way valve, the large chamber oil port of the third oil cylinder is connected to another working oil port of the third multi-way valve, and a third check valve and a fifth throttle valve are arranged in sequence at the connecting point, the third check valve only allows hydraulic oil to flow from the third multi-way valve to the third oil cylinder, and the large chamber oil port of the third oil cylinder is connected to the oil return pipeline through a second overflow valve.

[0018] The beneficial effect of the above technical solution is that: in this way, the third oil cylinder can remain slow and steady when extending, and at the same time, the large chamber oil port of the third oil cylinder is connected to the return oil pipeline through the second overflow valve, so that the large chamber of the third oil cylinder can always maintain a back pressure state, avoiding the third oil cylinder from stalling when contracting.

[0019] In the above technical solution, a fourth one-way valve and a sixth throttle valve are connected in parallel at the small chamber oil port of the third oil cylinder, and the fourth one-way valve only allows the 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 oil cylinder contracts, the oil supply in its small chamber is smoother and has a greater pressure.

[0021] A third object of the present invention is to provide a spray assembly with a simple structure and good controllability.

[0022] In order to achieve the above-mentioned object, another technical solution of the present invention is as follows: a spray assembly, comprising the spray assembly control system as described above.

[0023] The beneficial effects of the above technical solution are: it has a simple structure and good control stability, can drive the upper arm and the lower arm to be unfolded or retracted at the same time, and can also adjust the mounting frame to maintain a stable state.

[0024] A fourth object of the present invention is to provide a sprayer with a simple structure and good controllability.

[0025] In order to achieve the above object, another technical solution of the present invention is as follows: a sprayer comprises the spray assembly as described above.

[0026] The beneficial effects of the above technical solution are: the spray assembly is easy to operate and has good stability during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the hydraulic oil circuit of the boom deployment element according to Example 1 of the present invention;

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

[0029] Figure 3 It is a schematic diagram of a hydraulic oil circuit in which two first oil cylinders can always maintain a synchronous state in Embodiment 1 of the present invention;

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

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

[0032] Figure 6 Schematic diagram of the hydraulic oil circuit of the spray assembly control system described in Example 4 of the present invention.

[0033] In the figure: 1. boom deployment element; 11. first multi-way valve; 12. first oil cylinder; 13. first hydraulic lock; 14. first throttle valve; 15. second throttle valve; 16. first non-return valve; 17. shuttle valve; 18. first overflow valve; 2. oil supply pipeline; 3. oil return pipeline; 4. arm deployment element; 41. second oil cylinder; 42. second multi-way valve; 43. second hydraulic lock; 44. third throttle valve; 45. fourth throttle valve; 46. second non-return valve; 5. mounting frame control element; 51. third oil cylinder; 52. third multi-way valve; 53. third hydraulic lock; 54. third non-return valve; 55. fifth throttle valve; 56. fourth non-return valve; 57. sixth throttle valve; 58. second overflow valve; 6. oil tank; 7. oil supply pump. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention. In the present invention, unless otherwise specified, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the drawings; while "inside" and "outside" refer to the outline of the device.

[0035] Example 1

[0036] like Figure 1 As shown, the present embodiment provides a boom deployment element, including a first multi-way valve 11 and a first oil cylinder 12, wherein the first multi-way valve 11 is a three-position four-way valve, which has an oil inlet, an oil outlet and two working oil ports, and the first oil cylinder 12 is a double-acting oil cylinder, which has a large-cavity oil port and a small-cavity oil port, and the two working oil ports of the first multi-way valve 11 are both provided with a first hydraulic lock 13, and each of the first hydraulic lock 13 pilot oil ports is connected to another working oil port of the first multi-way valve 11, and the large-cavity oil port of the first oil cylinder 12 is provided with a first throttle valve 14, and the small-cavity oil port of the first oil cylinder 12 is provided with a second throttle valve 15, and the first throttle valve 14 and the second throttle valve 15 are respectively connected to the two first hydraulic locks 13, and by providing the first hydraulic lock, the first oil cylinder can remain stable when extended and retracted to any state, and by providing the first throttle valve and the second throttle valve, the first oil cylinder is slowly and steadily extended and retracted when extended and retracted, and its stability is good.

[0037] In the above technical solution, the second throttle valve 15 is connected in parallel with the first check valve 16, and the first check valve 16 is used to supply hydraulic oil to flow to the first oil cylinder 12 through the first multi-way valve 11, so that the first oil cylinder can be more smoothly and quickly contracted. 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, two first oil cylinders 12 are provided, and the first throttle valves 14 are provided at the large-cavity oil ports and the small-cavity oil ports of the two first oil cylinders 12 and are respectively connected to the corresponding first hydraulic locks 13, so that the two first oil cylinders can drive the boom to be unfolded or retracted together.

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

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

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

[0042] Example 2

[0043] like Figure 4 As shown, this embodiment provides a forearm deployment element, including a second oil cylinder 41 and a second multi-way valve 42, wherein the second oil cylinder 41 is a double-acting oil cylinder, the second multi-way valve 42 is a three-position four-way valve, and second hydraulic locks 43 are respectively arranged at the two working oil ports of the second multi-way valve 42, the large chamber oil port and the small chamber oil port of the second oil cylinder 41 are respectively connected to the two second hydraulic locks 43, and a third throttle valve 44 is arranged at the large chamber oil port of the second oil cylinder 41, and the pilot oil port of each second hydraulic lock 43 is respectively connected to another working oil 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 oil cylinder to be smoothly deployed.

[0044] In the above technical solution, the large cavity oil port and the small cavity oil port of the second oil cylinder 41 are respectively provided with fourth throttle valves 45, and the fourth throttle valves 45 are connected in parallel with second one-way valves 46, and the second one-way valves 46 only allow the hydraulic oil to flow from the second multi-way valve 42 to the second oil cylinder 41, so that the second oil cylinder is smoother and has a greater force when contracting. In this embodiment, the fourth throttle valve 45 and the corresponding second one-way valve 46 form a one-way throttle valve.

[0045] Example 3

[0046] like Figure 5As shown, this embodiment provides a mounting frame control element, including a third oil cylinder 51 (also known as a contour oil cylinder) and a third multi-way valve 52, wherein the third oil cylinder 51 is a double-acting oil cylinder, and the third multi-way valve 52 is a three-position four-way valve. The small cavity oil port of the third oil 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 oil port of the third hydraulic lock 53 is connected to another working oil port of the third multi-way valve 52, and the large cavity oil port of the third oil cylinder 51 is connected to the Another working oil port is connected, and a third one-way valve 54 and a fifth throttle valve 55 are arranged in sequence at the connecting point. The third one-way valve 54 only allows the hydraulic oil to flow from the third multi-way valve 52 to the third oil cylinder 51, and the large chamber oil port of the third oil cylinder 51 is provided with a second overflow valve to discharge oil outward, so that the third oil cylinder can maintain slow and stable extension. At the same time, the large chamber oil port of the third oil cylinder is connected to the return oil pipeline through the second overflow valve, so that the large chamber of the third oil cylinder can always maintain a back pressure state, avoiding the stall of the third oil cylinder when contracting.

[0047] In the above technical solution, the fourth one-way valve 56 and the sixth throttle valve 57 are connected in parallel at the small chamber oil port of the third oil cylinder 51. The fourth one-way valve 56 only allows the hydraulic oil to flow from the third multi-way valve 52 to the third oil cylinder 51, so that when the third oil cylinder contracts, the oil supply in its small chamber is smoother and has a greater pressure. In this embodiment, the fourth one-way 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 pipeline 2, an oil return pipeline 3, a boom deployment element 1 as described in Example 1, a small arm deployment element 4 as described in Example 2, and a mounting frame control element 5 as described in Example 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 pipeline 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 pipeline 3. Of course, this embodiment may also include an oil tank 6 and an oil supply pump 7, the oil return pipeline is connected to the oil tank 6, the oil supply pipeline is connected to the oil tank through the oil supply pump, and the oil supply pump provides power for delivering oil to the oil supply pipeline.

[0050] Example 5

[0051] The present embodiment provides a spray assembly, including a spray assembly control system as described in Example 4, which has a simple structure and good control stability. It can simultaneously drive the upper arm and the lower arm to be unfolded or folded, and can also adjust the mounting frame to maintain a stable state.

[0052] Example 6

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

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

[0055] The embodiments of the present invention are described in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A boom deployment element, characterized in that: The invention comprises a first multi-way valve (11) and a first oil cylinder (12); the first multi-way valve (11) is a three-position four-way valve having an oil inlet, an oil outlet and two working oil ports; the first oil cylinder (12) is a double-acting oil cylinder having a large-cavity oil port and a small-cavity oil port; a first hydraulic lock (13) is arranged at each of the two working oil ports of the first multi-way valve (11); and each pilot oil port of the first hydraulic lock (13) is connected to another working oil port of the first multi-way valve (11); a first throttle valve (14) is arranged at the large-cavity oil port of the first oil cylinder (12); a second throttle valve (15) is arranged at the small-cavity oil port of the first oil cylinder (12); and the first throttle valve (14) and the second throttle valve (15) are respectively connected to the two first hydraulic locks (13).

2. The boom deployment element according to claim 1, characterized in that: The second throttle valve (15) is connected in parallel with a first one-way valve (16), and the first one-way valve (16) is used to supply hydraulic oil to flow to the first oil cylinder (12) through the first multi-way valve (11).

3. The boom deployment element according to claim 1, characterized in that: Two first oil cylinders (12) are provided, and the first throttle valves (14) are provided at the large chamber oil ports and the small chamber oil ports of the two first oil cylinders (12) and are respectively connected to the corresponding first hydraulic locks (13).

4. The boom deployment element according to claim 3, characterized in that: It also includes two shuttle valves (17) and two first overflow valves (18); the two working oil ports of the first multi-way valve (11) are respectively the first working oil port and the second working oil port; the large chamber oil port of the first oil cylinder (12) is connected to the first working oil port; the small chamber oil port of the first oil cylinder (12) is connected to the second working oil port; the large chamber oil ports of the two first oil cylinders (12) are respectively connected to the oil ports at both ends of one of the shuttle valves (17); the small chamber oil ports of the two first oil cylinders (12) are respectively connected to the oil ports at both ends of the other shuttle valve (17); the two first overflow valves (18) correspond to the two shuttle valves (17) one by one; and the middle position oil port of each shuttle valve (17) is connected to the second working oil port through the corresponding first overflow valve (18).

5. A spray assembly control system, characterized in that: The invention comprises an oil supply pipeline (2), an oil return pipeline (3), a second oil cylinder (41), a second multi-way valve (42) and a boom deployment element (1) as claimed in any one of claims 1 to 4, wherein the second oil cylinder (41) is a double-acting oil cylinder, 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 both connected to the oil supply pipeline (2), the oil outlets of the first multi-way valve (11) and the second multi-way valve (42) are both connected to the oil return pipeline (3), second hydraulic locks (43) are respectively arranged at the two working oil ports of the second multi-way valve (42), the large chamber oil port and the small chamber oil port of the second oil cylinder (41) are respectively connected to the two second hydraulic locks (43), and a third throttle valve (44) is arranged at the large chamber oil port of the second oil cylinder (41), and the pilot oil port of each second hydraulic lock (43) is respectively connected to the other working oil port of the second multi-way valve (42).

6. The spray assembly control system according to claim 5, characterized in that: A fourth throttle valve (45) is also provided at the large chamber oil port and the small chamber oil port of the second oil cylinder (41), respectively, and a second one-way valve (46) is connected in parallel to the fourth throttle valve (45), and the second one-way valve (46) only allows hydraulic oil to flow from the second multi-way valve (42) to the second oil cylinder (41).

7. The spray assembly control system according to claim 5 or 6, characterized in that: The utility model also comprises a third oil cylinder (51) and a third multi-way valve (52), wherein the third oil cylinder (51) is a double-acting oil cylinder, 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), the oil outlet of the third multi-way valve (52) is connected to the oil return pipeline (3), the small chamber oil port of the third oil cylinder (51) is connected to the working oil port of the third multi-way valve (52), and a third hydraulic lock (53) is arranged at the connection point, and the third hydraulic lock (53) The pilot oil port of the third multi-way valve (52) is connected to another working oil port of the third multi-way valve (52), the large chamber oil port of the third oil cylinder (51) is connected to another working oil port of the third multi-way valve (52), and 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 oil cylinder (51), and the large chamber oil port of the third oil cylinder (51) is connected to the oil return pipeline (3) through a second overflow valve (58).

8. The spray assembly control system according to claim 7, characterized in that: A fourth one-way valve (56) and a sixth throttle valve (57) are connected in parallel at the small chamber oil port of the third oil cylinder (51), and the fourth one-way valve (56) only allows hydraulic oil to flow from the third multi-way valve (52) to the third oil cylinder (51).

9. A spray assembly, characterized in that: Comprising a spray assembly control system as described in any one of claims 5-8.

10. A spray machine, characterized in that: Comprising the spray assembly as described in claim 9.

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