Multi-way valve for rice harvester, hydraulic system and rice harvester

Abstract

The utility model discloses a multi-way valve for a rice harvester, a hydraulic system and the rice harvester. The multi-way valve comprises an inlet P used for being connected with an oil source; the working port A1 is used for being connected with a header oil cylinder; the working port A2 is used for being connected with a reel oil cylinder; the working port A3 is used for connecting a grain unloading oil cylinder; an inlet of the flow valve is connected with the inlet P, an outlet I of the flow valve is connected with an inlet of the reversing valve II, and an outlet II is connected with an inlet I and an inlet II of the reversing valve I; the reversing valve I is connected with a working port A1 through a hydraulic lock I; the reversing valve II is connected with a working port A2 through a hydraulic lock II; an oil return port of the reversing valve II is connected with an inlet of the reversing valve III; the third reversing valve is connected with a working port A3 through a third hydraulic lock. According to the utility model, the composite action of the header and the reel is realized, an operator can conveniently and quickly operate the header and the reel, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of hydraulic system technology, specifically relating to a multi-way valve for a rice harvester, a hydraulic system, and a rice harvester. Background Technology

[0002] A rice harvester is an integrated machine for harvesting rice. It can complete harvesting, threshing, and centralized storage in one operation, and then transport the harvested rice to a transport vehicle. However, the control valves in existing rice harvesters cannot achieve combined actions of the header and reel, which hinders rapid operation by the operator, causes delays, and reduces production efficiency. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a multi-way valve, hydraulic system, and rice harvester for a rice harvester, which realizes the combined action of the header and the reel, facilitating quick operation of the header and reel by the operator and improving production efficiency.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] In a first aspect, a multi-way valve for a rice harvester is provided, comprising: an inlet P for connecting to an oil source; a working port A1 for connecting to a header cylinder; a working port A2 for connecting to a reel cylinder; a working port A3 for connecting to a unloading cylinder; an inlet of a flow valve connected to inlet P; an outlet of the flow valve connected to the inlet of a second directional valve; an outlet of the flow valve connected to both inlets of a first directional valve; an outlet of the first directional valve connected to the inlet of a first hydraulic lock; an outlet of the first directional valve connected to the control port of the first hydraulic lock; and an outlet of the first hydraulic lock connected to working port A1; an outlet of the second directional valve connected to the inlet of the second hydraulic lock; an outlet of the second directional valve connected to the control port of the second hydraulic lock; and an outlet of the second hydraulic lock connected to working port A2; a return port of the second directional valve connected to the inlet of a third directional valve; an outlet of the third directional valve connected to the inlet of the third hydraulic lock; an outlet of the third directional valve connected to the control port of the third hydraulic lock; and an outlet of the third hydraulic lock connected to working port A3.

[0006] Furthermore, it also includes an oil return port T for connecting to the oil tank, wherein the oil return port T is respectively connected to the oil return port of the reversing valve three and the oil return port of the reversing valve one.

[0007] Furthermore, it also includes relief valve one and relief valve two. The inlet of relief valve one is connected to inlet P, and the outlet of relief valve one is connected to return oil port T. The inlet of relief valve two is connected to outlet one of the flow valve, and the outlet of relief valve two is connected to return oil port T.

[0008] Furthermore, when directional valve one is in the left position, directional valve two is in the middle position, and directional valve three is in the middle position; the flow valve is initially in the right position, and hydraulic oil returns to the oil tank through inlet P, outlet one of the flow valve, inlet of directional valve two, return port of directional valve two, inlet of directional valve three, return port of directional valve three, and return port T. The reel cylinder and unloading cylinder do not operate. When the flow valve switches to the left position, hydraulic oil enters the cutting platform cylinder through inlet P, outlet two of the flow valve, inlet one of directional valve one, outlet one of directional valve one, inlet one of hydraulic lock one, outlet one of hydraulic lock one, and working port A1, and the cutting platform rises. When directional valve one switches to the right position, hydraulic oil enters the control port of hydraulic lock one through inlet one of directional valve one and outlet two of directional valve one, and hydraulic lock one is opened. The hydraulic oil in the cutting platform cylinder enters the oil tank through hydraulic lock one, return port one of directional valve one, and return port T, and the cutting platform descends.

[0009] Furthermore, when directional valve one is in the neutral position, directional valve two is in the left position, and directional valve three is in the neutral position; the flow valve is initially in the right position, and hydraulic oil enters the reel cylinder through inlet P, outlet one of the flow valve, inlet of directional valve two, outlet one of directional valve two, inlet of hydraulic lock two, outlet of hydraulic lock two, and working port A2, causing the reel to rise; when directional valve two switches to the right position, hydraulic oil enters the control port of hydraulic lock two through inlet and outlet two of directional valve two, and hydraulic lock two is opened, and the hydraulic oil in the reel cylinder enters the oil tank through return port of directional valve two, neutral position of directional valve three, and return port T, causing the reel to descend, and the unloading cylinder does not move; when the flow valve switches to the left position, hydraulic oil enters the oil tank through inlet P, outlet two of the flow valve, inlet two of directional valve one, outlet three of directional valve one, and return port T, and the cutting table cylinder does not move.

[0010] Furthermore, when directional valve one is in the neutral position, directional valve two is in the neutral position, and directional valve three is in the left position; the flow valve is initially in the right position, and hydraulic oil enters the unloading cylinder through inlet P, outlet one of the flow valve, the neutral position of directional valve two, the inlet of directional valve three, outlet one of directional valve three, the inlet of hydraulic lock three, the outlet of hydraulic lock three, and working port A3, causing the unloading cylinder to extend and the reel cylinder to remain stationary; when directional valve three is switched to the right position, hydraulic oil enters the control port of hydraulic lock three through the inlet of directional valve three and outlet two of directional valve three, opening hydraulic lock three, and the hydraulic oil in the unloading cylinder enters the oil tank through the return port and return port T of directional valve three, causing the unloading cylinder to retract; when the flow valve is switched to the left position, hydraulic oil enters the oil tank through inlet P, outlet two of the flow valve, inlet two of directional valve one, outlet three of directional valve one, and return port T, and the cutting table cylinder remains stationary.

[0011] Furthermore, when directional valve one is in the left position, directional valve two is in the left position, and directional valve three is in the neutral position; the flow valve is initially in the right position, and hydraulic oil enters the reel cylinder through inlet P, outlet one of the flow valve, inlet of directional valve two, outlet one of directional valve two, inlet of hydraulic lock two, outlet of hydraulic lock two, and working port A2, causing the reel to rise; when directional valve two switches to the right position, hydraulic oil enters the control port of hydraulic lock two through inlet and outlet two of directional valve two, and hydraulic lock two is opened. The hydraulic oil in the reel cylinder then enters through the return port of directional valve two and the neutral position of directional valve three. When the return port T enters the oil tank, the reel descends, and the unloading cylinder remains stationary. When the flow valve switches to the left position, hydraulic oil enters the header cylinder through inlet P, outlet 2 of the flow valve, inlet 1 of directional valve 1, outlet 1 of directional valve 1, inlet 1 of hydraulic lock 1, outlet 1 of hydraulic lock 1, and working port A1, causing the header to rise. When directional valve 1 switches to the right position, hydraulic oil enters the control port of hydraulic lock 1 through inlet 1 of directional valve 1 and outlet 2 of directional valve 1, opening hydraulic lock 1. The hydraulic oil in the header cylinder then enters the oil tank through hydraulic lock 1, the return port of directional valve 1, and return port T, causing the header to descend.

[0012] Furthermore, when directional valve one is in the left position, directional valve two is in the neutral position, and directional valve three is in the left position; the flow valve is initially in the right position, and hydraulic oil enters the unloading cylinder through inlet P, outlet one of the flow valve, the neutral position of directional valve two, the inlet of directional valve three, outlet one of directional valve three, the inlet of hydraulic lock three, the outlet of hydraulic lock three, and working port A3. The unloading cylinder extends, and the reel cylinder does not move. When directional valve three switches to the right position, hydraulic oil enters the control port of hydraulic lock three through the inlet and outlet two of directional valve three, and hydraulic lock three is opened. The hydraulic oil in the unloading cylinder then flows through the directional valve... When the return oil port and return oil port T of valve three enter the oil tank, the unloading oil cylinder retracts. When the flow valve is switched to the left position, the hydraulic oil enters the cutting platform cylinder through inlet P, outlet two of the flow valve, inlet one of the directional valve one, outlet one of the directional valve one, inlet one of the hydraulic lock one, outlet one of the hydraulic lock one, and working port A1, causing the cutting platform to rise. When the directional valve one is switched to the right position, the hydraulic oil enters the control port of the hydraulic lock one through inlet one of the directional valve one and outlet two of the directional valve one, and opens the hydraulic lock one. The hydraulic oil in the cutting platform cylinder enters the oil tank through the return oil port of the hydraulic lock one, the directional valve one, and return oil port T, causing the cutting platform to descend.

[0013] In a second aspect, a hydraulic system for a rice harvester is provided, wherein the hydraulic system is equipped with the multi-way valve for a rice harvester described in the first aspect.

[0014] Thirdly, a rice harvester is provided, wherein the rice harvester is equipped with the multi-way valve for rice harvesters described in the first aspect.

[0015] Compared with the prior art, the beneficial effects achieved by this utility model are as follows: This utility model connects the inlet of the flow valve to inlet P, the outlet of the flow valve to the inlet of the second directional valve, and the outlet of the flow valve to both inlets of the first directional valve; the outlet of the first directional valve connects to the inlet of the first hydraulic lock, the outlet of the first directional valve connects to the control port of the hydraulic lock, and the outlet of the first hydraulic lock connects to the working port A1; the outlet of the second directional valve connects to the inlet of the second hydraulic lock, the outlet of the second directional valve connects to the control port of the second hydraulic lock, and the outlet of the second hydraulic lock connects to the working port A2; the return port of the second directional valve connects to the inlet of the third directional valve; the outlet of the third directional valve connects to the inlet of the third hydraulic lock, the outlet of the third directional valve connects to the control port of the third hydraulic lock, and the outlet of the third hydraulic lock connects to the working port A3; this achieves the combined action of the header and the reel, facilitating quick operation of the header and the reel by the operator and improving production efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the principle of a multi-way valve for a rice harvester provided in an embodiment of the present invention;

[0017] In the diagram: 1. Relief valve one; 2. Flow valve; 3. Relief valve two; 4. Directional valve one; 51. Directional valve two; 52. Directional valve three; 61. Hydraulic lock one; 62. Hydraulic lock two; 63. Hydraulic lock three. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0019] Example 1

[0020] like Figure 1As shown, a multi-way valve for a rice harvester includes: an overflow valve 1, a flow valve 2, an overflow valve 3, a directional valve 4, a directional valve 51, a directional valve 52, a hydraulic lock 61, a hydraulic lock 62, a hydraulic lock 63, an inlet P for connecting to an oil source, a working port A1 for connecting to the header cylinder, a working port A2 for connecting to the reel cylinder, a working port A3 for connecting to the unloading cylinder, and a return port T for connecting to the oil tank. The directional valve 4 is a manual directional valve, while the directional valves 51 and 52 are both three-position four-way solenoid directional valves. In this embodiment, the oil source is a hydraulic pump, the set pressure of the overflow valve 1 is 17±0.5MPa, and the set pressure of the overflow valve 3 is 12±0.5MPa. The overflow valve pressure and the flow valve flow rate can be adjusted according to actual needs; the flow valve can be directionally switched using hydraulic control or electrical control. In this embodiment, after the flow valve is set to a certain flow rate, when the outlet pressure of the flow valve changes with the load, the pressure compensator will sense the pressure before and after the throttling orifice and adjust the working position of the compensator accordingly to keep the pressure difference before and after the throttling orifice constant, that is, to keep the flow rate stable.

[0021] The inlet of flow valve 2 is connected to inlet P, the outlet of flow valve 2 is connected to the inlet P2 of directional valve 2 51, and the outlet of flow valve 2 is connected to the inlet P0 and inlet P1 of directional valve 4.

[0022] The outlet a1 of the directional valve 4 is connected to the inlet of the hydraulic lock 61, the outlet b1 of the directional valve 4 is connected to the control port of the hydraulic lock 61, and the outlet of the hydraulic lock 61 is connected to the working port A1.

[0023] The outlet a2 of directional valve 2 51 is connected to the inlet of hydraulic lock 2 62, the outlet b2 of directional valve 2 51 is connected to the control port of hydraulic lock 2 62, and the outlet of hydraulic lock 2 62 is connected to the working port A2; the return port T2 of directional valve 2 51 is connected to the inlet P3 of directional valve 3 52.

[0024] The outlet a3 of the directional valve 3 52 is connected to the inlet of the hydraulic lock 3 63, the outlet b3 of the directional valve 3 52 is connected to the control port of the hydraulic lock 3 63, and the outlet of the hydraulic lock 3 63 is connected to the working port A3.

[0025] The return port T3 of directional valve 3 52 and the return port T1 of directional valve 1 4 are respectively connected to the return port T.

[0026] The inlet of relief valve 1 is connected to inlet P, and the outlet of relief valve 1 is connected to return port T; the inlet of relief valve 23 is connected to outlet 1 of flow valve 2, and the outlet of relief valve 23 is connected to return port T.

[0027] (1) Independent operation of the cutting table cylinder;

[0028] Directional control valve 1 (4) is in the left position, directional control valve 2 (51) is in the middle position, directional control valve 3 (52) is in the middle position, and hydraulic locks 2 (62) and 3 (63) are both closed. Flow valve 2 is initially in the right position, with a flow rate of 5 L / min flowing preferentially from outlet 1 to directional control valves 2 (51) and 3 (52). Specifically, hydraulic oil returns to the oil tank via inlet P, outlet 1 of flow valve 2, inlet P2 of directional control valve 2 (51), return port T2 of directional control valve 2 (51), inlet P3 of directional control valve 3 (52), return port T3 of directional control valve 3 (52), and return port T. The reel cylinder and unloading cylinder do not operate.

[0029] When flow valve 2 is switched to the left position, hydraulic oil enters the cutting table cylinder through inlet P, outlet 2 of flow valve 2, inlet P0 of directional valve 4, outlet a1 of directional valve 4, inlet of hydraulic lock 61, outlet of hydraulic lock 61, and working port A1, causing the cutting table to rise.

[0030] When the directional valve 4 is switched to the right position, the hydraulic oil enters the control port of the hydraulic lock 61 through the inlet P0 and outlet b1 of the directional valve 4, and the hydraulic lock 61 is opened. The hydraulic oil in the cutting table cylinder enters the oil tank through the hydraulic lock 61, the return port T1 of the directional valve 4 and the return port T, and the cutting table descends.

[0031] (2) Independent operation of the reel cylinder;

[0032] Directional control valve 4 is in the neutral position, directional control valve 51 is in the left position, and directional control valve 52 is in the neutral position; hydraulic locks 61 and 63 are both closed. Flow valve 2 is initially in the right position, with a flow rate of 5 L / min flowing preferentially from outlet 1 of flow valve 2 to directional control valve 51. Specifically, hydraulic oil enters the reel cylinder through inlet P, outlet 1 of flow valve 2, inlet P2 of directional control valve 51, outlet a2 of directional control valve 51, inlet of hydraulic lock 62, outlet of hydraulic lock 62, and working port A2, causing the reel to rise.

[0033] When the second directional valve 51 is switched to the right position, the hydraulic oil enters the control port of the second hydraulic lock 62 through the inlet P2 and outlet b2 of the second directional valve 51, and opens the second hydraulic lock 62. The hydraulic oil in the reel cylinder enters the oil tank through the return port T2 of the second directional valve 51, the middle position of the third directional valve 52, and the return port T. The reel descends, and the unloading cylinder does not move.

[0034] When flow valve 2 is switched to the left position, hydraulic oil enters the oil tank through inlet P, outlet 2 of flow valve 2, inlet 2 P1 of directional valve 4, outlet 3 C1 of directional valve 4, and return port T, and the cutting table cylinder does not move.

[0035] (3) Independent operation of the grain and oil unloading cylinder;

[0036] Directional control valve 1 (4) is in the neutral position, directional control valve 2 (51) is in the neutral position, and directional control valve 3 (52) is in the left position; hydraulic locks 1 (61) and 2 (62) are both closed. Flow valve 2 is initially in the right position, with a flow rate of 5 L / min flowing preferentially from outlet 1 of flow valve 2 to directional control valve 2 (51). Specifically, hydraulic oil enters the unloading cylinder via inlet P, outlet 1 of flow valve 2, the neutral position of directional control valve 2 (51), inlet P3 of directional control valve 3 (52), outlet a3 of directional control valve 3 (52), inlet of hydraulic lock 3 (63), outlet of hydraulic lock 3 (63), and working port A3. The unloading cylinder extends, and the reel cylinder does not move.

[0037] When the reversing valve 352 is switched to the right position, the hydraulic oil enters the control port of the hydraulic lock 363 through the inlet P3 and outlet b3 of the reversing valve 352, and opens the hydraulic lock 363. The hydraulic oil in the unloading cylinder enters the oil tank through the return port T3 and return port T of the reversing valve 352, and the unloading cylinder retracts.

[0038] When flow valve 2 is switched to the left position, hydraulic oil enters the oil tank through inlet P, outlet 2 of flow valve 2, inlet 2 P1 of directional valve 4, outlet 3 C1 of directional valve 4, and return port T, and the cutting table cylinder does not move.

[0039] (4) Combined operation of the header cylinder and the reel cylinder;

[0040] Directional control valve 4 is in the left position, directional control valve 51 is in the left position, and directional control valve 52 is in the neutral position; hydraulic lock 63 is in the closed state. Flow valve 2 is initially in the right position, with a flow rate of 5 L / min flowing preferentially from outlet 1 of flow valve 2 to directional control valve 51. Specifically, hydraulic oil enters the reel cylinder through inlet P, outlet 1 of flow valve 2, inlet P2 of directional control valve 51, outlet a2 of directional control valve 51, inlet of hydraulic lock 62, outlet of hydraulic lock 62, and working port A2, causing the reel to rise.

[0041] When the second directional valve 51 is switched to the right position, the hydraulic oil enters the control port of the second hydraulic lock 62 through the inlet P2 and outlet b2 of the second directional valve 51, and opens the second hydraulic lock 62. The hydraulic oil in the reel cylinder enters the oil tank through the return port T2 of the second directional valve 51, the middle position of the third directional valve 52, and the return port T. The reel descends, and the unloading cylinder does not move.

[0042] When flow valve 2 is switched to the left position, hydraulic oil enters the cutting table cylinder through inlet P, outlet 2 of flow valve 2, inlet P0 of directional valve 4, outlet a1 of directional valve 4, inlet of hydraulic lock 61, outlet of hydraulic lock 61, and working port A1, causing the cutting table to rise.

[0043] When the directional valve 4 is switched to the right position, the hydraulic oil enters the control port of the hydraulic lock 61 through the inlet P0 and outlet b1 of the directional valve 4, and the hydraulic lock 61 is opened. The hydraulic oil in the cutting table cylinder enters the oil tank through the hydraulic lock 61, the return port T1 of the directional valve 4 and the return port T, and the cutting table descends.

[0044] (5) Combined operation of the header cylinder and the unloading cylinder;

[0045] Directional control valve 1 (4) is in the left position, directional control valve 2 (51) is in the neutral position, and directional control valve 3 (52) is in the left position; hydraulic lock 2 (62) is closed. Flow valve 2 is initially in the right position, with a flow rate of 5 L / min flowing preferentially from outlet 1 of flow valve 2 to directional control valve 2 (51). Specifically, hydraulic oil enters the unloading cylinder via inlet P, outlet 1 of flow valve 2, the neutral position of directional control valve 2 (51), inlet P3 of directional control valve 3 (52), outlet a3 of directional control valve 3 (52), inlet of hydraulic lock 3 (63), outlet of hydraulic lock 3 (63), and working port A3. The unloading cylinder extends, and the reel cylinder remains stationary.

[0046] When the reversing valve 352 is switched to the right position, the hydraulic oil enters the control port of the hydraulic lock 363 through the inlet and outlet 2b3 of the reversing valve 352, and opens the hydraulic lock 363. The hydraulic oil in the unloading cylinder enters the oil tank through the return port T3 and return port T of the reversing valve 352, and the unloading cylinder retracts.

[0047] When flow valve 2 is switched to the left position, hydraulic oil enters the cutting table cylinder through inlet P, outlet 2 of flow valve 2, inlet P0 of directional valve 4, outlet a1 of directional valve 4, inlet of hydraulic lock 61, outlet of hydraulic lock 61, and working port A1, causing the cutting table to rise.

[0048] When the directional valve 4 is switched to the right position, the hydraulic oil enters the control port of the hydraulic lock 61 through the inlet P0 and outlet b1 of the directional valve 4, and the hydraulic lock 61 is opened. The hydraulic oil in the cutting table cylinder enters the oil tank through the hydraulic lock 61, the return port T1 of the directional valve 4 and the return port T, and the cutting table descends.

[0049] Example 2

[0050] Based on the multi-way valve for a rice harvester described in Embodiment 1, this embodiment provides a hydraulic system for a rice harvester, wherein the hydraulic system is equipped with the multi-way valve for a rice harvester described in Embodiment 1.

[0051] Example 3

[0052] Based on the multi-way valve for a rice harvester described in Embodiment 1 and the hydraulic system for a rice harvester described in Embodiment 2, this embodiment provides a rice harvester equipped with either the multi-way valve for a rice harvester described in Embodiment 1 or the hydraulic system for a rice harvester described in Embodiment 2.

[0053] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A multi-way valve for a rice harvester, characterized by comprising: Comprise: an inlet P for connecting an oil source; a working port A1 for connecting a header oil cylinder; a working port A2 for connecting a reel oil cylinder; a working port A3 for connecting a unloading oil cylinder; an inlet of a flow valve (2) is connected to the inlet P, an outlet one of the flow valve (2) is connected to an inlet of a reversing valve two (51), an outlet two of the flow valve (2) is connected to an inlet one and an inlet two of a reversing valve one (4); an outlet one of the reversing valve one (4) is connected to an inlet of a hydraulic lock one (61), an outlet two of the reversing valve one (4) is connected to a control port of the hydraulic lock one (61), an outlet of the hydraulic lock one (61) is connected to the working port A1; an outlet one of the reversing valve two (51) is connected to an inlet of a hydraulic lock two (62), an outlet two of the reversing valve two (51) is connected to a control port of the hydraulic lock two (62), an outlet of the hydraulic lock two (62) is connected to the working port A2; an oil return port of the reversing valve two (51) is connected to an inlet of a reversing valve three (52); an outlet one of the reversing valve three (52) is connected to an inlet of a hydraulic lock three (63), an outlet two of the reversing valve three (52) is connected to a control port of the hydraulic lock three (63), an outlet of the hydraulic lock three (63) is connected to the working port A3.

2. The multiple spool valve for a rice harvester according to claim 1, wherein Further comprising an oil return port T for connecting an oil tank, the oil return port T is connected to the oil return port of the reversing valve three (52) and the oil return port of the reversing valve one (4) respectively.

3. The multiple spool valve for a rice harvester according to claim 2, wherein Further comprising an overflow valve one (1) and an overflow valve two (3), an inlet of the overflow valve one (1) is connected to the inlet P, an outlet of the overflow valve one (1) is connected to the oil return port T; an inlet of the overflow valve two (3) is connected to the outlet one of the flow valve (2), an outlet of the overflow valve two (3) is connected to the oil return port T.

4. The multiple spool valve for a rice harvester according to claim 2, wherein When the reversing valve one (4) is in the left position, the reversing valve two (51) is in the middle position, and the reversing valve three (52) is in the middle position; the flow valve (2) is initially in the right position, hydraulic oil returns to the oil tank through the inlet P, the outlet one of the flow valve (2), the inlet of the reversing valve two (51), the oil return port of the reversing valve two (51), the inlet of the reversing valve three (52), the oil return port of the reversing valve three (52), and the oil return port T, and the reel oil cylinder and the unloading oil cylinder are not in action; When the flow valve (2) is switched to the left position, hydraulic oil enters the header oil cylinder through the inlet P, the outlet two of the flow valve (2), the inlet one of the reversing valve one (4), the outlet one of the reversing valve one (4), the inlet of the hydraulic lock one (61), the outlet of the hydraulic lock one (61), and the working port A1, and the header rises; When the reversing valve one (4) is switched to the right position, hydraulic oil enters the control port of the hydraulic lock one (61) through the inlet one of the reversing valve one (4) and the outlet two of the reversing valve one (4), and the hydraulic lock one (61) is opened, and hydraulic oil in the header oil cylinder enters the oil tank through the hydraulic lock one (61), the oil return port of the reversing valve one (4), and the oil return port T, and the header descends.

5. The multiple spool valve for a rice harvester according to claim 2, wherein When the reversing valve one (4) is in the middle position, the reversing valve two (51) is in the left position, and the reversing valve three (52) is in the middle position; the flow valve (2) is initially in the right position, and the hydraulic oil enters the unloading oil cylinder through the inlet P, the outlet one of the flow valve (2), the inlet of the reversing valve two (51), the outlet one of the reversing valve two (51), the inlet of the hydraulic lock two (62), the outlet of the hydraulic lock two (62), the working port A3, and the unloading oil cylinder extends out, and the pick-up wheel oil cylinder does not act; When the reversing valve three (52) is switched to the right position, the hydraulic oil enters the control port of the hydraulic lock three (63) through the inlet of the reversing valve three (52) and the outlet two of the reversing valve three (52), and the hydraulic lock three (63) is opened, and the hydraulic oil in the unloading oil cylinder enters the tank through the oil return port of the reversing valve three (52) and the oil return port T, and the unloading oil cylinder retracts; When the flow valve (2) is switched to the left position, the hydraulic oil enters the tank through the inlet P, the outlet two of the flow valve (2), the inlet two of the reversing valve one (4), the outlet three of the reversing valve one (4), and the oil return port T, and the header oil cylinder does not act.

6. The multiple spool valve for a rice harvester according to claim 2, wherein When the reversing valve one (4) is in the middle position, the reversing valve two (51) is in the middle position, and the reversing valve three (52) is in the left position; the flow valve (2) is initially in the right position, and the hydraulic oil enters the unloading oil cylinder through the inlet P, the outlet one of the flow valve (2), the middle position of the reversing valve two (51), the inlet of the reversing valve three (52), the outlet one of the reversing valve three (52), the inlet of the hydraulic lock three (63), the outlet of the hydraulic lock three (63), the working port A3, and the unloading oil cylinder extends out, and the pick-up wheel oil cylinder does not act; When the reversing valve three (52) is switched to the right position, the hydraulic oil enters the control port of the hydraulic lock three (63) through the inlet of the reversing valve three (52) and the outlet two of the reversing valve three (52), and the hydraulic lock three (63) is opened, and the hydraulic oil in the unloading oil cylinder enters the tank through the oil return port of the reversing valve three (52) and the oil return port T, and the unloading oil cylinder retracts; When the flow valve (2) is switched to the left position, the hydraulic oil enters the tank through the inlet P, the outlet two of the flow valve (2), the inlet two of the reversing valve one (4), the outlet three of the reversing valve one (4), and the oil return port T, and the header oil cylinder does not act.

7. The multiple spool valve for a rice harvester according to claim 2, wherein When the reversing valve one (4) is in the middle position, the reversing valve two (51) is in the middle position, and the reversing valve three (52) is in the left position; the flow valve (2) is initially in the right position, and the hydraulic oil enters the unloading oil cylinder through the inlet P, the outlet one of the flow valve (2), the inlet of the reversing valve two (51), the outlet one of the reversing valve two (51), the inlet of the hydraulic lock two (62), the outlet of the hydraulic lock two (62), the working port A3, and the unloading oil cylinder extends out, and the pick-up wheel oil cylinder does not act; When the reversing valve two (51) is switched to the right position, the hydraulic oil enters the control port of the hydraulic lock two (62) through the inlet of the reversing valve two (51) and the outlet two of the reversing valve two (51), and the hydraulic lock two (62) is opened, and the hydraulic oil in the pick-up wheel oil cylinder enters the tank through the oil return port of the reversing valve two (51), the middle position of the reversing valve three (52), and the oil return port T, and the pick-up wheel descends, and the unloading oil cylinder does not act; When the flow valve (2) switches to the left position, hydraulic oil enters the header cylinder through the inlet P, the outlet two of the flow valve (2), the inlet one of the reversing valve one (4), the outlet one of the reversing valve one (4), the inlet of the hydraulic lock one (61), the outlet of the hydraulic lock one (61), and the working port A1, and the header rises. When the reversing valve one (4) switches to the right position, hydraulic oil enters the control port of the hydraulic lock one (61) through the inlet one of the reversing valve one (4) and the outlet two of the reversing valve one (4), and opens the hydraulic lock one (61), and the hydraulic oil in the header cylinder enters the oil tank through the hydraulic lock one (61), the oil return port of the reversing valve one (4), and the oil return port T, and the header descends.

8. The multiple spool valve for a rice harvester according to claim 2, wherein When the reversing valve one (4) is in the left position, the reversing valve two (51) is in the middle position, and the reversing valve three (52) is in the left position; the flow valve (2) is initially in the right position, and hydraulic oil enters the unloading cylinder through the inlet P, the outlet one of the flow valve (2), the middle position of the reversing valve two (51), the inlet of the reversing valve three (52), the outlet one of the reversing valve three (52), the inlet of the hydraulic lock three (63), the outlet of the hydraulic lock three (63), and the working port A3, and the unloading cylinder extends, and the reel cylinder does not act; When the reversing valve three (52) switches to the right position, hydraulic oil enters the control port of the hydraulic lock three (63) through the inlet of the reversing valve three (52) and the outlet two of the reversing valve three (52), and opens the hydraulic lock three (63), and the hydraulic oil in the unloading cylinder enters the oil tank through the oil return port of the reversing valve three (52) and the oil return port T, and the unloading cylinder retracts; When the flow valve (2) switches to the left position, hydraulic oil enters the header cylinder through the inlet P, the outlet two of the flow valve (2), the inlet one of the reversing valve one (4), the outlet one of the reversing valve one (4), the inlet of the hydraulic lock one (61), the outlet of the hydraulic lock one (61), and the working port A1, and the header rises. When the reversing valve one (4) switches to the right position, hydraulic oil enters the control port of the hydraulic lock one (61) through the inlet one of the reversing valve one (4) and the outlet two of the reversing valve one (4), and opens the hydraulic lock one (61), and the hydraulic oil in the header cylinder enters the oil tank through the hydraulic lock one (61), the oil return port of the reversing valve one (4), and the oil return port T, and the header descends.

9. A hydraulic system for a rice harvester, characterized by, The hydraulic system is provided with the multi-way valve for the rice harvester according to any one of claims 1-8.

10. A rice harvester characterized by comprising: The rice harvester is provided with the multi-way valve for the rice harvester according to any one of claims 1-8.

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