Integrated hydraulic valve block of self-propelled mowing and flattening machine and control method of integrated hydraulic valve block

Abstract

The invention belongs to the technical field of agricultural mechanical equipment, and particularly relates to an integrated hydraulic valve block of a self-propelled mowing and flattening machine and a control method thereof, the integrated hydraulic valve block comprises a system pressure adjusting and accessory system, a header lifting adjusting system, a parking braking system, a header floating adjusting system, a header angle adjusting system and a flattening and rolling adjusting system; the system pressure adjusting and accessory system comprises a system pressure sensor, a gear pump, a hydraulic oil tank and a system pressure proportional valve. The system pressure and flow are dynamically adjusted through a plurality of proportional valves, the integration level and reliability of the hydraulic system are improved, precise control over all execution components of the self-propelled mowing and flattening machine is achieved, the hydraulic valve block can meet the working pressure and speed requirements of different execution components, and the working efficiency and precision are improved; and by dynamically adjusting the system pressure, precise control over energy consumption is achieved, and therefore the energy utilization efficiency of the whole system is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of agricultural machinery and equipment, and in particular relates to an integrated hydraulic valve block of a self-propelled grass mower and flattener and a control method thereof. Background Art

[0002] Self-propelled mower and conditioner is a kind of forage harvesting machinery widely used in mowing and drying of crops such as alfalfa and oats. The hydraulic system of the self-propelled mower and conditioner is responsible for the movement and execution of almost all moving parts, including the control of the cutting table lifting cylinder, the cutting table floating cylinder, the cutting table angle cylinder, the flattening roller cylinder, the parking brake and other executive parts. Since the working pressure and working speed requirements of each component are different, the hydraulic valve block of the existing self-propelled mower and conditioner is mainly composed of switch valves, which have low integration and insufficient adjustment accuracy, and cannot meet the needs of efficient and precise control.

[0003] The Chinese invention patent with application number 202210424756.3 discloses a hydraulic system and hydraulic control method of a self-propelled mower and flattener, including an integrated hydraulic valve block, a header lifting cylinder, a header tilting cylinder, multiple flattening roller gap adjustment cylinders, and a pair of floating cylinders, which are all connected to the integrated hydraulic valve block pipeline. Multiple groups of hydraulic control valves are integrated into the integrated hydraulic valve block, and the header lifting cylinder, header tilting cylinder, multiple flattening roller gap adjustment cylinders, and a pair of floating cylinders are controlled by the integrated hydraulic valve block to perform corresponding work, which facilitates the operation of the hydraulic system, simplifies the pipeline structure, reduces the hydraulic pipeline, improves the integration, and facilitates the installation and maintenance of the hydraulic valve block. However, the pressure regulation in this application is completed by a proportional pressure reducing valve, and the proportional pressure reducing valve can only act on two groups of functions: left and right floating and flattening roller pressure adjustment, and its control stroke is single; the cutting platform lifting mechanism and the cutting platform height maintaining solenoid valve in this application are both switch valves, which cannot accurately adjust the system pressure and flow when the cutting platform is lifted and lowered, so the lifting and lowering speeds cannot be adjusted; and during the lowering process of the cutting platform in this application, since the cutting platform weighs about one ton, it is necessary to set an anti-fall circuit in the hydraulic system, but there is no anti-fall related functional circuit in this application, which increases the safety hazard of use. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide an integrated hydraulic valve block and a control method for a self-propelled mower and flattener, so as to improve the integration and reliability of the hydraulic system and achieve precise control of the various actuators of the self-propelled mower and flattener.

[0005] The purpose of the present invention can be achieved by adopting the following technical solutions: An integrated hydraulic valve block for a self-propelled mower and flattener, including a system pressure regulation and accessory system, a cutting platform lifting and adjusting system, a parking brake system, a cutting platform floating adjustment system, a cutting platform angle adjustment system and a flattening roller pressure adjustment system; the system pressure regulation and accessory system includes: a system pressure sensor, a gear pump, a hydraulic oil tank and a system pressure proportional valve; the cutting platform lifting and adjusting system includes: a cutting platform holding proportional valve, a cutting platform safety valve, a cutting platform check valve, a cutting platform damping hole, a cutting platform quick-drop valve, a cutting platform lifting proportional valve, and a cutting platform lifting cylinder; the parking brake system III includes a cancel brake valve, an opening brake valve, a parking brake, a parking brake pressure switch, a parking brake ... Vehicle brake accumulator, parking brake accumulator control valve; the header floating adjustment system includes header right floating pressure-increasing valve, header right floating pressure-reducing valve, header left floating pressure-increasing valve, header left floating pressure-reducing valve, header left floating pressure sensor, header left floating oil cylinder, header left floating accumulator, header right floating accumulator, header right floating oil cylinder, header right floating pressure sensor; the header angle adjustment system includes header angle oil cylinder telescopic valve, header angle oil cylinder hydraulic lock, header angle oil cylinder damping hole, header angle oil cylinder; the flattening roller pressure adjustment system includes flattening roller pressure-increasing valve, flattening roller pressure-reducing valve, flattening roller accumulator, flattening roller oil cylinder and flattening roller pressure sensor.

[0006] The gear pump of the system pressure regulation and accessory system is simultaneously connected to the system pressure sensor, the second end of the cutting platform lifting proportional valve, the second end of the cutting platform quick lowering valve, the first end of the opening brake valve, the first end of the cutting platform right floating pressurizing valve, the first end of the cutting platform left floating pressurizing valve, the second end of the cutting platform angle cylinder telescopic valve, the first end of the flattening roller pressurizing valve, and the first end of the system pressure proportional valve.

[0007] The hydraulic oil tank is simultaneously connected to the first end of the cutting platform lifting proportional valve, the second end of the cutting platform damping hole, the second end of the opening brake valve, the second end of the cutting platform right floating pressurizing valve, the second end of the cutting platform left floating pressurizing valve, the first end of the cutting platform angle cylinder telescopic valve, the second end of the flattening roller pressurizing valve, and the second end of the system pressure proportional valve.

[0008] The cutting platform lifting proportional valve of the cutting platform lifting and adjusting system is a two-position three-way proportional valve, the second end of the cutting platform lifting proportional valve is connected to the gear pump, and the first end of the cutting platform lifting proportional valve is connected to the hydraulic oil tank; the cutting platform holding proportional valve is a two-position two-way proportional valve, the cutting platform safety valve is connected in parallel with the cutting platform holding proportional valve, and the first end of the cutting platform holding proportional valve is simultaneously connected to the first end of the control cutting platform safety valve and the third end of the cutting platform lifting proportional valve; the rod chamber of the cutting platform lifting cylinder is simultaneously connected to the second end of the cutting platform holding proportional valve and the second end of the cutting platform safety valve.

[0009] The cutter platform one-way valve is a hydraulically controlled one-way valve, the first end of which is connected to the rodless chamber of the cutter platform lifting cylinder, and the hydraulically controlled end of which is simultaneously connected to the third end of the cutter platform lifting proportional valve, the first end of the cutter platform holding proportional valve, and the first end of the cutter platform safety valve; the first end of the cutter platform damping hole is connected to the second end of the cutter platform one-way valve, and the second end of the cutter platform damping hole is connected to the hydraulic oil tank; the cutter platform quick-drop valve is a two-position, two-way reversing valve, the first end of which is simultaneously connected to the first end of the cutter platform one-way valve and the rodless chamber of the cutter platform lifting cylinder, and the second end of the cutter platform quick-drop valve is connected to the gear pump and the system pressure sensor.

[0010] The opening brake valve of the parking brake system is a two-position three-way reversing valve, the first end of the opening brake valve is connected to the gear pump, and the second end of the opening brake valve is connected to the hydraulic oil tank; the canceling brake valve is a two-position two-way reversing valve, the first end of the canceling brake valve is connected to the third end of the opening brake valve; the parking brake pressure switch is connected to the second end of the canceling brake valve; the parking brake accumulator control valve is a two-position two-way reversing valve, the first end of the parking brake accumulator control valve is simultaneously connected to the parking brake, the parking brake pressure switch, and the second end of the canceling brake valve; the parking brake accumulator is connected to the second end of the parking brake accumulator control valve.

[0011] The right floating pressure-increasing valve of the cutting platform floating adjustment system is a two-position three-way reversing valve, the first end of which is connected to the gear pump, and the second end of which is connected to the hydraulic oil tank; the right floating pressure-reducing valve of the cutting platform is a two-position two-way reversing valve, the first end of which is connected to the third end of the right floating pressure-reducing valve, and the second end of which is connected to the right floating pressure sensor, the right floating accumulator and the rodless cylinder of the right floating oil cylinder. cavity; the left floating pressure-increasing valve of the cutting platform is a two-position three-way reversing valve, the first end of the left floating pressure-increasing valve of the cutting platform is connected to the gear pump, and the second end of the left floating pressure-increasing valve of the cutting platform is connected to the hydraulic oil tank; the left floating pressure-reducing valve of the cutting platform is a two-position two-way reversing valve, the first end of the left floating pressure-reducing valve of the cutting platform is connected to the third end of the left floating pressure-reducing valve of the cutting platform, and the second end of the left floating pressure-reducing valve of the cutting platform is simultaneously connected to the left floating pressure sensor of the cutting platform, the left floating accumulator of the cutting platform, and the rodless cavity of the left floating cylinder of the cutting platform.

[0012] The telescopic valve of the cutting platform angle cylinder of the cutting platform angle adjustment system is a three-position four-way reversing valve, the first end of the cutting platform angle cylinder telescopic valve is connected to the hydraulic oil tank, and the second end of the cutting platform angle cylinder telescopic valve is connected to the gear pump; the first end of the cutting platform angle cylinder hydraulic lock is connected to the fourth end of the cutting platform angle cylinder telescopic valve, and the second end of the cutting platform angle cylinder hydraulic lock is connected to the third end of the cutting platform angle cylinder telescopic valve; the first end of the cutting platform angle cylinder damping hole is connected to the third end of the cutting platform angle cylinder hydraulic lock; the rod chamber of the cutting platform angle cylinder is connected to the fourth end of the cutting platform angle cylinder hydraulic lock, and the rodless chamber of the cutting platform angle cylinder is connected to the second end of the cutting platform angle cylinder damping hole.

[0013] The flattening roller pressure regulating system's flattening roller pressure-adding valve is a two-position three-way reversing valve, the first end of which is connected to the gear pump, and the second end of which is connected to the hydraulic oil tank. The flattening roller pressure reducing valve is a two-position two-way reversing valve, the first end of which is connected to the third end of the flattening roller pressure-adding valve, and the second end of which is simultaneously connected to the flattening roller accumulator, the rodless chamber of the flattening roller oil cylinder, and the flattening roller pressure sensor.

[0014] The present invention also provides an integrated hydraulic valve block control method for a self-propelled mower and flattener, which is controlled by an integrated hydraulic valve block and includes: a cutting table lifting and lowering adjustment control method, a parking brake control method, a cutting table floating adjustment control method, a cutting table angle adjustment control method and a flattening roller pressure adjustment control method.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention adopts multiple proportional valves to dynamically adjust the system pressure and flow, which not only improves the integration and reliability of the hydraulic system, but also realizes precise control of the various actuators of the self-propelled mower and flattener. The hydraulic valve block can meet the working pressure and speed requirements of different actuators, thereby improving the working efficiency and accuracy; and by dynamically adjusting the system pressure, accurate control of energy consumption can be achieved. This dynamic adjustment mechanism can not only save power, but also effectively reduce fuel consumption, thereby improving the energy utilization efficiency of the entire system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention, Figure 2 It is a flowchart of the method for controlling the lifting and lowering of the header in the present invention. Figure 3 is a flowchart of the parking brake control method in the present invention, Figure 4 It is a flowchart of the floating adjustment control method of the header in the present invention. Figure 5 This is a flowchart of the method for adjusting the angle of the header in the present invention. Figure 6 It is a flowchart of the flattening roller pressure adjustment control method in the present invention.

[0017] In the figure: 1. Cutting platform holding proportional valve; 2. Cutting platform safety valve; 3. Cutting platform one-way valve; 4. Cutting platform damping hole; 5. Cutting platform quick-drop valve; 6. Cutting platform lifting proportional valve; 7. Cancel brake valve; 8. System pressure sensor; 9. Open brake valve; 10. Gear pump; 11. Cutting platform right floating pressure-increasing valve; 12. Hydraulic oil tank; 13. Cutting platform right floating pressure-reducing valve; 14. System pressure proportional valve 15. Cutting platform left floating pressure-increasing valve; 16. Cutting platform left floating pressure-reducing valve; 17. Cutting platform angle cylinder telescopic valve; 18. Cutting platform angle cylinder hydraulic lock 19. Flattening roller pressure-increasing valve; 20. Flattening roller pressure-reducing valve; 21. Flattening roller accumulator; 22. Flattening roller cylinder; 23. Flattening roller pressure sensor; 24. Damping hole of cutting platform angle cylinder; 25. Cutting platform angle cylinder; 26. Cutting platform left floating pressure sensor; 27. Cutting platform left floating cylinder; 28. Cutting platform left floating accumulator; 29. ​​Cutting platform right floating accumulator; 30. Cutting platform right floating cylinder; 31. Cutting platform right floating pressure sensor; 32. Parking brake; 33. Parking brake pressure switch; 34. Parking brake accumulator; 35. Parking brake accumulator control valve; 36. Cutting platform lifting cylinder; Ⅰ. System pressure regulation and accessory system; Ⅱ. Cutting platform lifting adjustment system; Ⅲ. Parking brake system; Ⅳ. Cutting platform floating adjustment system; Ⅴ. Cutting platform angle adjustment system; Ⅵ. Flattening roller pressure adjustment system. DETAILED DESCRIPTION

[0018] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings.

[0019] like Figure 1As shown, an integrated hydraulic valve block of a self-propelled mower and flattener includes a system pressure regulation and accessory system I, a header lifting and adjusting system II, a parking brake system III, a header floating adjustment system IV, a header angle adjustment system V and a flattening roller pressure adjustment system VI; the system pressure regulation and accessory system I includes: a system pressure sensor 8, a gear pump 10, a hydraulic oil tank 12 and a system pressure proportional valve 14; the header lifting and adjusting system II includes: a header holding proportional valve 1, a header safety valve 2, a header check valve 3, a header damping hole 4, a header quick-drop valve 5, a header lifting proportional valve 6, and a header lifting cylinder 36; the parking brake system III includes a cancel brake valve 7, an opening brake valve 9, a parking brake 32, a parking brake pressure switch 33, and a parking brake accumulator 3 4. Parking brake accumulator control valve 35; the header floating adjustment system IV includes a header right floating pressure-increasing valve 11, a header right floating pressure-reducing valve 13, a header left floating pressure-increasing valve 15, a header left floating pressure-reducing valve 16, a header left floating pressure sensor 26, a header left floating oil cylinder 27, a header left floating accumulator 28, a header right floating accumulator 29, a header right floating oil cylinder 30, and a header right floating pressure sensor 31; the header angle adjustment system V includes a header angle oil cylinder telescopic valve 17, a header angle oil cylinder hydraulic lock 18, a header angle oil cylinder damping hole 24, and a header angle oil cylinder 25; the flattening roller pressure adjustment system VI includes a flattening roller pressure-increasing valve 19, a flattening roller pressure-reducing valve 20, a flattening roller accumulator 21, a flattening roller oil cylinder 22, and a flattening roller pressure sensor 23.

[0020] The gear pump 10 of the system pressure regulation and accessory system I is simultaneously connected to the system pressure sensor 8, the second end of the header lifting proportional valve 6, the second end of the header quick lowering valve 5, the first end of the opening brake valve 9, the first end of the header right floating pressure-increasing valve 11, the first end of the header left floating pressure-increasing valve 15, the second end of the header angle cylinder telescopic valve 17, the first end of the flattening roller pressure-increasing valve 19, and the first end of the system pressure proportional valve 14; the hydraulic oil tank 12 is simultaneously connected to the first end of the header lifting proportional valve 6, the second end of the header damping hole 4, the second end of the opening brake valve 9, the second end of the header right floating pressure-increasing valve 11, the first end of the header left floating pressure-increasing valve 15 The second end, the first end of the cutting table angle cylinder telescopic valve 17, the second end of the flattening roller pressurizing valve 19, and the second end of the system pressure proportional valve 14 are connected; the beneficial effect of the system pressure regulation and accessory system I is that the first end of the system pressure proportional valve 14 is connected to the gear pump 10, and the second end of the system pressure proportional valve 14 is connected to the hydraulic oil tank 12, and by adjusting the input current of the system pressure proportional valve 14, the pressure at the first end of the system pressure proportional valve 14, that is, the system pressure of the integrated hydraulic valve block can be adjusted; further, the system pressure sensor 8 is connected to the first end of the system pressure proportional valve 14, so the system pressure of the integrated hydraulic valve block can be monitored by the system pressure sensor 8.

[0021] The cutting platform lifting proportional valve 6 of the cutting platform lifting adjustment system II is a two-position three-way proportional valve, the second end of the cutting platform lifting proportional valve 6 is connected to the gear pump 10, and the first end of the cutting platform lifting proportional valve 6 is connected to the hydraulic oil tank 12; the cutting platform holding proportional valve 1 is a two-position two-way proportional valve, the cutting platform safety valve 2 is connected in parallel with the cutting platform holding proportional valve 1, and the first end of the cutting platform holding proportional valve 1 is simultaneously connected to the first end of the control cutting platform safety valve 2 and the third end of the cutting platform lifting proportional valve 6; the rod chamber of the cutting platform lifting cylinder 36 is simultaneously connected to the second end of the cutting platform holding proportional valve 1 and the second end of the cutting platform safety valve 2; the cutting platform check valve 3 is a hydraulically controlled check valve, The first end of the header check valve 3 is connected to the rodless cavity of the header lifting cylinder 36, and the hydraulic control end of the header check valve 3 is simultaneously connected to the third end of the header lifting proportional valve 6, the first end of the header holding proportional valve 1, and the first end of the header safety valve 2; the first end of the header damping hole 4 is connected to the second end of the header check valve 3, and the second end of the header damping hole 4 is connected to the hydraulic oil tank 12; the header quick-drop valve 5 is a two-position two-way reversing valve, and the first end of the header quick-drop valve 5 is simultaneously connected to the first end of the header check valve 3 and the rodless cavity of the header lifting cylinder 36, and the second end of the header quick-drop valve 5 is connected to the gear pump 10 and the system pressure sensor 8. The beneficial effect of the header lifting adjustment system II is that by adjusting the input current of the header lifting proportional valve 6, a header lifting pressure can be output at the third end of the header lifting proportional valve 6 based on the system pressure of the integrated hydraulic valve block, and the header lifting pressure will not be higher than the system pressure of the integrated hydraulic valve block. The header holding proportional valve 1 is de-energized and has a built-in one-way valve, and the hydraulic oil can be unidirectionally conducted from the first end of the header holding proportional valve 1 to the second end of the header holding proportional valve 1. When the header holding proportional valve 1 is in the de-energized position, the header lifting pressure can be directly transmitted to the rod chamber of the header lifting cylinder 36, and the header lifting pressure can enable the header lifting cylinder 36 to obtain lifting force. When the lifting force of the header lifting cylinder 36 is higher than the lifting resistance of the header lifting cylinder 36, the header is lifted. When the cutting platform is lifted, there is pressure at the hydraulic control end of the cutting platform one-way valve 3, the cutting platform one-way valve 3 is bidirectionally conductive, and the hydraulic oil in the rodless chamber of the cutting platform lifting cylinder 36 flows through the cutting platform one-way valve 3 and the cutting platform damping hole 4 and returns to the hydraulic oil tank 12; further, when the cutting platform needs to be lowered, the cutting platform holding proportional valve 1 is energized, and the hydraulic oil in the rod chamber of the cutting platform lifting cylinder 36 flows through the cutting platform holding proportional valve 1 and the cutting platform lifting proportional valve 6 and returns to the hydraulic oil tank 12. By adjusting the input current of the cutting platform holding proportional valve 1, the cross-sectional area of ​​the oil passing inside the cutting platform holding proportional valve 1 can be adjusted, thereby adjusting the cutting platform lowering speed.Under the action of atmospheric pressure, the hydraulic oil in the hydraulic oil tank 12 returns to the rodless chamber of the header lifting cylinder 36 through the header damping hole 4 and the header check valve 3 in turn. The existence of the header damping hole 4 can also reduce the header descent speed; further, when the header needs to be quickly lowered, the header holding proportional valve 1 is energized, and the current of the header lifting proportional valve 6 is opened to the maximum value, so that the header lifting proportional valve 6 is fully at the potential, and the header quick-drop valve 5 is energized. At this time, the hydraulic oil in the rod chamber of the header lifting cylinder 36 can quickly flow through the header holding proportional valve 1 and the header lifting proportional valve 6 back to the hydraulic oil tank 12. The hydraulic oil in the hydraulic oil tank 12 can flow through the header quick-drop valve 5 back to the rodless chamber of the header lifting cylinder 36. At this time, the movement resistance of the hydraulic oil in the rod chamber and rodless chamber of the cutting platform lifting cylinder 36 is minimal, and the cutting platform can quickly drop to the lowest position; further, when the cutting platform is subjected to an abnormal external force that causes the cutting platform to move downward, the pressure in the rod chamber of the cutting platform lifting cylinder 36 rises sharply. When the pressure in the rod chamber of the cutting platform lifting cylinder 36 exceeds the set pressure of the cutting platform safety valve 2, the pressure in the rod chamber of the cutting platform lifting cylinder 36 can be released to the hydraulic oil tank 12 through the cutting platform safety valve 2, the cutting platform lifting proportional valve 6, and the system pressure proportional valve 14 to protect the hydraulic system.

[0022] The opening brake valve 9 of the parking brake system III is a two-position three-way reversing valve, the first end of the opening brake valve 9 is connected to the gear pump 10, and the second end of the opening brake valve 9 is connected to the hydraulic oil tank 12; the canceling brake valve 7 is a two-position two-way reversing valve, the first end of the canceling brake valve 7 is connected to the third end of the opening brake valve 9; the parking brake pressure switch 33 is connected to the second end of the canceling brake valve 7; the parking brake accumulator control valve 35 is a two-position two-way reversing valve, the first end of the parking brake accumulator control valve 35 is simultaneously connected to the parking brake 32, the parking brake pressure switch 33, and the second end of the canceling brake valve 7; the parking brake accumulator 34 is connected to the second end of the parking brake accumulator control valve 35. The beneficial effect of the parking brake system III is that the parking brake accumulator control valve 35 needs to be energized all the time. When parking brake is required, the open brake valve 9 is energized, and the system pressure of the integrated hydraulic valve block is transmitted to the parking brake 32 and the parking brake accumulator 34 through the open brake valve 9 and the cancel brake valve 7 in sequence. If the required pressure of the parking brake 32 is reached, the parking brake pressure switch 33 sends a signal. When the parking brake needs to be canceled, the parking brake accumulator control valve 35 is energized, the cancel brake valve 7 is energized, and the hydraulic oil of the parking brake 32 can flow through the cancel brake valve 7 and the open brake valve 9 back to the hydraulic oil tank 12. When the whole vehicle is parked and powered off, the parking brake accumulator control valve 35 loses power, the cancel brake valve 7 loses power, and the pressure stored in the parking brake accumulator 34 is released and transmitted to the parking brake 32, realizing power-off parking brake. Further, the parking brake is generally divided into two types: pressure loss brake / pressure cancellation brake and pressure brake / pressure loss cancellation brake. The present invention relates to a control method for a parking brake of the type of pressure-on braking / pressure-off cancelling braking.

[0023] The right floating pressure-increasing valve 11 of the floating adjustment system IV of the cutting platform is a two-position three-way reversing valve, the first end of which is connected to the gear pump 10, and the second end of which is connected to the hydraulic oil tank 12; the right floating pressure-reducing valve 13 of the cutting platform is a two-position two-way reversing valve, the first end of which is connected to the third end of the right floating pressure-reducing valve 11 of the cutting platform, and the second end of which is connected to the right floating pressure sensor 31 of the cutting platform, the right floating accumulator 29 of the cutting platform, and the right floating cylinder 30 of the cutting platform. The rod cavity is connected; the left floating pressure-increasing valve 15 of the cutting platform is a two-position three-way reversing valve, the first end of the left floating pressure-increasing valve 15 of the cutting platform is connected to the gear pump 10, and the second end of the left floating pressure-increasing valve 15 of the cutting platform is connected to the hydraulic oil tank 12; the left floating pressure-reducing valve 16 of the cutting platform is a two-position two-way reversing valve, the first end of the left floating pressure-reducing valve 16 of the cutting platform is connected to the third end of the left floating pressure-reducing valve 15 of the cutting platform, and the second end of the left floating pressure-reducing valve 16 of the cutting platform is simultaneously connected to the rodless cavity of the left floating pressure sensor 26 of the cutting platform, the left floating accumulator 28 of the cutting platform, and the left floating cylinder 27 of the cutting platform. The beneficial effect of the floating adjustment system IV of the cutting platform is that when the left floating oil cylinder 27 of the cutting platform needs a higher floating pressure, the system pressure of the integrated hydraulic valve block is adjusted to the target pressure by adjusting the input current of the system pressure proportional valve 14, the left floating pressurizing valve 15 of the cutting platform is energized, and the system pressure of the integrated hydraulic valve block is transmitted to the left floating pressure sensor 26 of the cutting platform, the left floating oil cylinder 27 of the cutting platform and the left floating accumulator 28 of the cutting platform through the left floating pressurizing valve 15 of the cutting platform and the left floating pressure reducing valve 16 of the cutting platform in sequence. When the left floating oil cylinder 27 of the cutting platform needs a lower floating pressure, the system pressure of the integrated hydraulic valve block is adjusted to the target pressure by adjusting the input current of the system pressure proportional valve 14, the left floating pressurizing valve 15 of the cutting platform is energized, the left floating pressure reducing valve 16 of the cutting platform is energized, and the pressure in the left floating oil cylinder 27 of the cutting platform is reduced to the target pressure (system pressure of the integrated hydraulic valve block) through the left floating pressure reducing valve 16 of the cutting platform and the left floating pressurizing valve 15 of the cutting platform in sequence. When the floating pressure of the left floating cylinder 27 of the cutting platform needs to be completely released, the left floating pressure reducing valve 16 of the cutting platform is energized, and the hydraulic oil in the left floating cylinder 27 of the cutting platform is released to the hydraulic oil tank 12 through the left floating pressure reducing valve 16 and the left floating pressure increasing valve 15 of the cutting platform in sequence, and the floating pressure of the left floating cylinder 27 of the cutting platform is reduced to zero. Further, the floating pressure control method of the right floating cylinder 30 of the cutting platform is the same as that of the left floating cylinder 27 of the cutting platform. Further, according to the requirements of the driver, the floating pressures of the right floating cylinder 30 of the cutting platform and the left floating cylinder 27 of the cutting platform can be controlled separately or together.

[0024] The cutting platform angle cylinder telescopic valve 17 of the cutting platform angle adjustment system V is a three-position four-way reversing valve, the first end of the cutting platform angle cylinder telescopic valve 17 is connected to the hydraulic oil tank 12, and the second end of the cutting platform angle cylinder telescopic valve 17 is connected to the gear pump 10; the first end of the cutting platform angle cylinder hydraulic lock 18 is connected to the fourth end of the cutting platform angle cylinder telescopic valve 17, and the second end of the cutting platform angle cylinder hydraulic lock 18 is connected to the third end of the cutting platform angle cylinder telescopic valve 17; the first end of the cutting platform angle cylinder damping hole 24 is connected to the third end of the cutting platform angle cylinder hydraulic lock 18; the rod chamber of the cutting platform angle cylinder 25 is connected to the fourth end of the cutting platform angle cylinder hydraulic lock 18, and the rodless chamber of the cutting platform angle cylinder 25 is connected to the second end of the cutting platform angle cylinder damping hole 24. The beneficial effect of the cutting platform angle adjustment system V is that when the cutting platform angle cylinder 25 needs to be extended, the cutting platform angle cylinder telescopic valve 17 is energized to the right position, and the system hydraulic oil passes through the cutting platform angle cylinder telescopic valve 17, the cutting platform angle cylinder hydraulic lock 18, and the cutting platform angle cylinder damping hole 24 to the rodless chamber of the cutting platform angle cylinder 25, and the hydraulic oil in the rod chamber of the cutting platform angle cylinder 25 passes through the cutting platform angle cylinder hydraulic lock 18 and the cutting platform angle cylinder telescopic valve 17 to return to the hydraulic oil tank 12. When the header angle cylinder 25 needs to be shortened, the header angle cylinder telescopic valve 17 is energized to the left position, and the system hydraulic oil passes through the header angle cylinder telescopic valve 17 and the header angle cylinder hydraulic lock 18 to the rod chamber of the header angle cylinder 25, and the hydraulic oil in the rodless chamber of the header angle cylinder 25 passes through the header angle cylinder damping hole 24, the header angle cylinder hydraulic lock 18, and the header angle cylinder telescopic valve 17 to return to the hydraulic oil tank 12. Further, by adjusting the system pressure of the integrated hydraulic valve block, the extension / contraction speed of the header angle cylinder 25 can be adjusted. When the header angle cylinder 25 is extended, the header angle becomes larger; when the header angle cylinder 25 is shortened, the header angle becomes smaller. Further, the function of the header angle cylinder hydraulic lock is to lock the position of the header angle cylinder 25 after the header angle adjustment is completed. The header angle cylinder damping hole 24 can increase the header angle adjustment time, and the driver can operate more calmly.

[0025] The flattening roller pressure regulating system VI is a two-position three-way reversing valve, the first end of which is connected to the gear pump 10, and the second end of which is connected to the hydraulic oil tank 12. The flattening roller pressure reducing valve 20 is a two-position two-way reversing valve, the first end of which is connected to the third end of the flattening roller pressure reducing valve 19, and the second end of which is connected to the flattening roller accumulator 21, the rodless chamber of the flattening roller oil cylinder 22, and the flattening roller pressure sensor 23. The beneficial effect of the flattening roller pressure regulating system VI is that when the flattening roller oil cylinder 22 needs a higher pressure, the system pressure of the integrated hydraulic valve block is adjusted to the target pressure by adjusting the input current of the system pressure proportional valve 14, the flattening roller pressurizing valve 19 is energized, and the system pressure of the integrated hydraulic valve block is transmitted to the flattening roller pressure sensor 23, the flattening roller oil cylinder 22 and the flattening roller accumulator 21 through the flattening roller pressurizing valve 19 and the flattening roller pressure reducing valve 20 in sequence. When the flattening roller oil cylinder 22 needs a lower pressure, the system pressure of the integrated hydraulic valve block is adjusted to the target pressure by adjusting the input current of the system pressure proportional valve 14, the flattening roller pressurizing valve 19 is energized, the flattening roller pressure reducing valve 20 is energized, and the pressure in the flattening roller oil cylinder 22 is reduced to the target pressure (the system pressure of the integrated hydraulic valve block) through the flattening roller pressure reducing valve 20 and the flattening roller pressurizing valve 19 in sequence. When the flattening roller cylinder 22 needs to completely release the pressure, the flattening roller pressure reducing valve 20 is energized, and the hydraulic oil in the flattening roller cylinder 22 is released to the hydraulic oil tank 12 through the flattening roller pressure reducing valve 20 and the flattening roller pressurizing valve 19 in sequence, and the pressure of the flattening roller cylinder 22 is reduced to zero.

[0026] like Figure 2-6 As shown, the present invention also provides an integrated hydraulic valve block control method for a self-propelled mower and flattener, including: a cutting table lifting and lowering adjustment control method, a parking brake control method, a cutting table floating adjustment control method, a cutting table angle adjustment control method and a flattening roller pressure adjustment control method.

[0027] like Figure 2 As shown, the present invention discloses an integrated hydraulic valve block control method for a self-propelled mower and flattener, wherein the control method for raising and lowering the cutting platform comprises the following steps: S1: After the driver presses the header raising button, the system pressure proportional valve 14 is energized, and after the system pressure sensor 8 determines that the system pressure of the integrated hydraulic valve block has reached a predetermined pressure, the header lifting proportional valve 6 is energized, and the header rises; S2: After the driver determines that the header has risen to the preset height, he releases the header rising button, the rise stops, and all valve blocks are powered off; S3: After the driver presses the header lowering button, the header holding proportional valve 1 is energized, and the header descends by its own weight. After the driver determines that the header has descended to a predetermined height, he releases the header lowering button, the descent stops, and all valve blocks are de-energized; S4: After the driver presses the header quick-descent button, header holding proportional valve 1 is energized, header quick-descent valve 5 is energized, and after the header quickly descends to the lowest position, all valve blocks are de-energized.

[0028] like Figure 3 As shown, the present invention discloses an integrated hydraulic valve block control method for a self-propelled mower and flattener, wherein the parking brake control method comprises the following steps: S1: First, the parking brake accumulator control valve 35 needs to be energized all the time. After the driver presses the parking button, the system pressure proportional valve 14 is energized. After the system pressure sensor 8 determines that the system pressure of the integrated hydraulic valve block has reached the preset pressure, the brake valve 9 is opened and energized. After the parking brake pressure switch 33 detects that the pressure has reached the preset brake pressure, all valve blocks are de-energized, and parking is successful. S2: After the driver presses the cancel parking button, the cancel brake valve 7 is energized, and after the parking brake pressure switch 33 detects that the pressure is lower than the preset brake pressure, it pauses for 2 seconds to wait for the brake pressure to be completely released, and all valve blocks are de-energized, and the cancellation of parking is successful.

[0029] like Figure 4 As shown, the present invention discloses an integrated hydraulic valve block control method for a self-propelled mower and flattener, wherein the floating adjustment control method of the cutting platform includes the following steps: S1: After the driver issues a command to increase the floating pressure of the header, the system pressure proportional valve 14 is energized, and the system pressure sensor 8 determines that the system pressure of the integrated hydraulic valve block has reached a predetermined pressure. The driver needs to issue a command to increase the floating pressure of the left header, the floating pressure of the right header, or both the floating pressures of the left and right headers; S2: Taking the increase of the left floating pressure of the cutting platform as an example, the left floating pressure boosting valve 15 of the cutting platform is energized, and after the left floating pressure sensor 26 of the cutting platform determines that the predetermined pressure has been reached, all valve blocks are de-energized, and the increase of the left floating pressure is completed; S3: After the driver issues a command to reduce the floating pressure of the header, the system pressure proportional valve 14 is energized, and the system pressure sensor 8 determines that the system pressure of the integrated hydraulic valve block has reached a predetermined pressure, and the driver needs to issue a command to reduce the floating pressure of the left header, the floating pressure of the right header, or both the floating pressures of the left and right headers; S4: Taking the reduction of the left floating pressure of the cutting platform as an example, the left floating pressure-increasing valve 15 and the left floating pressure-reducing valve 16 of the cutting platform are energized, and after the left floating pressure sensor 26 of the cutting platform determines that the predetermined pressure has been reached, all valve blocks are de-energized, and the reduction of the left floating pressure is completed.

[0030] like Figure 5 As shown, the present invention discloses an integrated hydraulic valve block control method for a self-propelled mower and flattener, wherein the cutting table angle adjustment control method comprises the following steps: S1: After the driver presses the button to increase the cutting platform angle, the system pressure proportional valve 14 is energized, and after the system pressure sensor 8 determines that the system pressure of the integrated hydraulic valve block has reached a predetermined pressure, the cutting platform angle cylinder telescopic valve 17 is energized, the cutting platform angle cylinder 25 is extended, and the cutting platform angle increases; S2: After the driver determines that the angle of the header reaches the preset angle, he releases the header raising button, the rise stops, and all valve blocks are powered off; S3: After the driver presses the button to reduce the cutting platform angle, the system pressure proportional valve 14 is energized, and after the system pressure sensor 8 determines that the system pressure of the integrated hydraulic valve block has reached a predetermined pressure, the cutting platform angle cylinder telescopic valve 17 is energized, the cutting platform angle cylinder 25 is shortened, and the cutting platform angle is reduced; S4: After the driver determines that the angle of the cutting platform reaches the preset angle, he releases the cutting platform lowering button, the lowering stops, and all valve blocks are powered off.

[0031] like Figure 6 As shown, the present invention discloses an integrated hydraulic valve block control method for a self-propelled mower and flattener, wherein the flattening roller pressure adjustment control method comprises the following steps: S1: After the driver issues a command to increase the pressure of the flattening roller, the system pressure proportional valve 14 is energized, and after the system pressure sensor 8 determines that the system pressure of the integrated hydraulic valve block has reached a predetermined pressure, the flattening roller pressurizing valve 19 is energized, and after the flattening roller pressure sensor 23 determines that the predetermined pressure has been reached, all valve blocks are de-energized, and the flattening roller pressure increase is completed; S2: After the driver issues an instruction to reduce the flattening roller pressure, the system pressure proportional valve 14 is energized, and after the system pressure sensor 8 determines that the system pressure of the integrated hydraulic valve block has reached the preset pressure, the flattening roller pressurizing valve 19 and the flattening roller reducing valve 20 are energized, and after the flattening roller pressure sensor 23 determines that the preset pressure has been reached, all valve blocks are de-energized, and the flattening roller pressure reduction is completed.

[0032] The method utilizes multiple proportional valves in the integrated hydraulic valve block to dynamically adjust the system pressure to achieve precise control of energy consumption. This dynamic adjustment mechanism can not only save power, but also effectively reduce fuel consumption, thereby improving the energy utilization efficiency of the entire system.

[0033] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An integrated hydraulic valve block for a self-propelled mower and flattener, characterized by: The invention comprises a system pressure regulation and accessory system (I), a cutting platform lifting and lowering regulation system (II), a parking brake system (III), a cutting platform floating regulation system (IV), a cutting platform angle regulation system (V) and a flattening roller pressure regulation system (VI); the system pressure regulation and accessory system (I) comprises: a system pressure sensor (8), a gear pump (10), a hydraulic oil tank (12) and a system pressure proportional valve (14); the cutting platform lifting and lowering regulation system (II) comprises: a cutting platform holding proportional valve (1), a cutting platform safety valve (2), a cutting platform check valve (3), a cutting platform damping hole (4), a cutting platform quick lowering valve (5), a cutting platform lifting proportional valve (6), and a cutting platform lifting cylinder (36); the parking brake system (III) comprises a canceling brake valve (7), an opening brake valve (9), a parking brake (32), a parking brake pressure switch (33), a parking brake accumulator (34), and a parking brake accumulator. The control valve (35); the floating adjustment system (IV) of the cutting platform includes a right floating pressure-increasing valve (11) of the cutting platform, a right floating pressure-reducing valve (13) of the cutting platform, a left floating pressure-increasing valve (15) of the cutting platform, a left floating pressure-reducing valve (16) of the cutting platform, a left floating pressure sensor (26) of the cutting platform, a left floating oil cylinder (27) of the cutting platform, a left floating accumulator (28) of the cutting platform, a right floating accumulator (29) of the cutting platform, a right floating oil cylinder (30) of the cutting platform, and a right floating pressure sensor (31) of the cutting platform; the angle adjustment system (V) of the cutting platform includes a telescopic valve (17) of the cutting platform angle oil cylinder, a hydraulic lock (18) of the cutting platform angle oil cylinder, a damping hole (24) of the cutting platform angle oil cylinder, and a flattening roller pressure adjustment system (VI) includes a flattening roller pressure-increasing valve (19) of the flattening roller, a pressure-reducing valve (20) of the flattening roller, an accumulator (21) of the flattening roller, a flattening roller oil cylinder (22) and a flattening roller pressure sensor (23).

2. The integrated hydraulic valve block of the self-propelled mower and conditioner according to claim 1 is characterized by: The gear pump (10) of the system pressure regulation and accessory system (I) is simultaneously connected to the system pressure sensor (8), the second end of the cutting platform lifting proportional valve (6), the second end of the cutting platform quick lowering valve (5), the first end of the opening brake valve (9), the first end of the cutting platform right floating pressure valve (11), the first end of the cutting platform left floating pressure valve (15), the second end of the cutting platform angle cylinder telescopic valve (17), the first end of the flattening roller pressure valve (19), and the first end of the system pressure proportional valve (14).

3. The integrated hydraulic valve block of the self-propelled mower and conditioner according to claim 1 is characterized by: The hydraulic oil tank (12) is simultaneously connected to the first end of the cutting platform lifting proportional valve (6), the second end of the cutting platform damping hole (4), the second end of the opening brake valve (9), the second end of the cutting platform right floating pressure valve (11), the second end of the cutting platform left floating pressure valve (15), the first end of the cutting platform angle cylinder telescopic valve (17), the second end of the flattening roller pressure valve (19), and the second end of the system pressure proportional valve (14).

4. The integrated hydraulic valve block of the self-propelled mower and conditioner according to claim 1, characterized in that: The cutting platform lifting proportional valve (6) of the cutting platform lifting adjustment system (II) is a two-position three-way proportional valve, the second end of the cutting platform lifting proportional valve (6) is connected to the gear pump (10), and the first end of the cutting platform lifting proportional valve (6) is connected to the hydraulic oil tank (12); the cutting platform holding proportional valve (1) is a two-position two-way proportional valve, the cutting platform safety valve (2) is connected in parallel with the cutting platform holding proportional valve (1), and the first end of the cutting platform holding proportional valve (1) is simultaneously connected to the first end of the cutting platform safety valve (2) and the third end of the cutting platform lifting proportional valve (6); the rod chamber of the cutting platform lifting cylinder (36) is simultaneously connected to the second end of the cutting platform holding proportional valve (1) and the second end of the cutting platform safety valve (2).

5. The integrated hydraulic valve block of the self-propelled mower and conditioner according to claim 1, characterized in that: The cutting platform one-way valve (3) is a hydraulically controlled one-way valve, the first end of which is connected to the rodless cavity of the cutting platform lifting cylinder (36), and the hydraulically controlled end of which is simultaneously connected to the third end of the cutting platform lifting proportional valve (6), the first end of the cutting platform holding proportional valve (1), and the first end of the cutting platform safety valve (2); the first end of the cutting platform damping hole (4) is connected to the second end of the cutting platform one-way valve (3), and the second end of the cutting platform damping hole (4) is connected to the hydraulic oil tank (12); the cutting platform quick-drop valve (5) is a two-position two-way reversing valve, the first end of which is simultaneously connected to the first end of the cutting platform one-way valve (3) and the rodless cavity of the cutting platform lifting cylinder (36), and the second end of the cutting platform quick-drop valve (5) is connected to the gear pump (10) and the system pressure sensor (8).

6. The integrated hydraulic valve block of the self-propelled mower and conditioner according to claim 1, characterized in that: The opening brake valve (9) of the parking brake system (III) is a two-position three-way reversing valve, wherein the first end of the opening brake valve (9) is connected to the gear pump (10), and the second end of the opening brake valve (9) is connected to the hydraulic oil tank (12); the canceling brake valve (7) is a two-position two-way reversing valve, wherein the first end of the canceling brake valve (7) is connected to the third end of the opening brake valve (9); the parking brake pressure switch (33) is connected to the second end of the canceling brake valve (7); the parking brake accumulator control valve (35) is a two-position two-way reversing valve, wherein the first end of the parking brake accumulator control valve (35) is simultaneously connected to the parking brake (32), the parking brake pressure switch (33), and the second end of the canceling brake valve (7); and the parking brake accumulator (34) is connected to the second end of the parking brake accumulator control valve (35).

7. The integrated hydraulic valve block of the self-propelled mower and conditioner according to claim 1, characterized in that: The right floating pressure-increasing valve (11) of the floating adjustment system (IV) of the cutting platform is a two-position three-way reversing valve, the first end of which is connected to the gear pump (10), and the second end of which is connected to the hydraulic oil tank (12); the right floating pressure-reducing valve (13) of the cutting platform is a two-position two-way reversing valve, the first end of which is connected to the third end of the right floating pressure-reducing valve (11), and the second end of which is connected to the right floating pressure sensor (31), the right floating accumulator (29), and the right floating oil cylinder (30). The left floating pressure-increasing valve (15) of the cutting platform is a two-position three-way reversing valve, the first end of which is connected to the gear pump (10), and the second end of which is connected to the hydraulic oil tank (12); the left floating pressure-reducing valve (16) of the cutting platform is a two-position two-way reversing valve, the first end of which is connected to the third end of the left floating pressure-increasing valve (15), and the second end of which is simultaneously connected to the left floating pressure sensor (26), the left floating accumulator (28), and the rodless chamber of the left floating oil cylinder (27).

8. The integrated hydraulic valve block of the self-propelled mower and conditioner according to claim 1, characterized in that: The cutting platform angle cylinder telescopic valve (17) of the cutting platform angle adjustment system (V) is a three-position four-way reversing valve, wherein the first end of the cutting platform angle cylinder telescopic valve (17) is connected to the hydraulic oil tank (12), and the second end of the cutting platform angle cylinder telescopic valve (17) is connected to the gear pump (10); the first end of the cutting platform angle cylinder hydraulic lock (18) is connected to the fourth end of the cutting platform angle cylinder telescopic valve (17), and the second end of the cutting platform angle cylinder hydraulic lock (18) is connected to the third end of the cutting platform angle cylinder telescopic valve (17); the first end of the cutting platform angle cylinder damping hole (24) is connected to the third end of the cutting platform angle cylinder hydraulic lock (18); the rod chamber of the cutting platform angle cylinder (25) is connected to the fourth end of the cutting platform angle cylinder hydraulic lock (18), and the rodless chamber of the cutting platform angle cylinder (25) is connected to the second end of the cutting platform angle cylinder damping hole (24).

9. The integrated hydraulic valve block of the self-propelled mower and conditioner according to claim 1, characterized in that: The flattening roller pressure regulating system (VI) includes a two-position three-way reversing valve, a first end of which is connected to a gear pump (10), and a second end of which is connected to a hydraulic oil tank (12). The flattening roller pressure reducing valve (20) is a two-position two-way reversing valve, a first end of which is connected to a third end of the flattening roller pressure reducing valve (19), and a second end of which is simultaneously connected to a flattening roller accumulator (21), a rodless chamber of a flattening roller oil cylinder (22), and a flattening roller pressure sensor (23).

10. A method for controlling an integrated hydraulic valve block of a self-propelled mower and flattener, characterized in that: The integrated hydraulic valve block control includes: a control method for controlling the lifting and lowering adjustment of the cutting platform, a parking brake control method, a floating adjustment control method of the cutting platform, a cutting platform angle adjustment control method and a flattening roller pressure adjustment control method.

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