Hydraulic control system for a potato sorter

Abstract

The present application relates to a kind of potato sorting machine hydraulic control system, including hydraulic pump, overflow valve, manual reversing valve, telescopic cylinder, speed regulating valve and hydraulic motor, hydraulic control system is provided with three parallel control oil paths, hydraulic pump is connected with overflow valve and two manual reversing valves by three parallel control oil paths, overflow valve keeps the pressure of hydraulic control system stable, the interval of sorting roller is adjusted by telescopic cylinder controlled by manual reversing valve, the action of hydraulic motor is controlled by manual reversing valve, and the speed of hydraulic motor is adjusted using speed regulating valve.The present application realizes the conveying and size grading of potato, and effectively solves the phenomenon of poor separation effect of damaged potato and impurities caused by blockage and winding during the sorting process.

Description

Technical Field

[0001] This invention relates to the field of hydraulic control of agricultural machinery, and specifically to a hydraulic control system for a potato sorting machine. Background Technology

[0002] Potato sorting machines can experience mechanical vibrations or instability during operation. Excessive vibration can damage the potatoes, negatively impacting their storage quality. Therefore, to ensure reliable and stable operation and smooth adjustment of the working state, a hydraulic control system is adopted. This hydraulic control system features multiple oil circuits that do not interfere with each other. It also includes a radiator and filter to reduce oil consumption and the probability of operational instability, thereby improving work efficiency and stability. Summary of the Invention

[0003] The purpose of this invention is to provide a reliable hydraulic control system for a potato sorting machine that can effectively perform potato sorting and cleaning tasks.

[0004] The technical solution of this invention is as follows: It includes a hydraulic pump station, a relief valve, a check valve, a manual directional valve A, a manual directional valve B, a throttle valve, a dual-hydraulic control check valve, a telescopic cylinder, speed control valve A, speed control valve B, speed control valve C, speed control valve D, hydraulic motor I, hydraulic motor II, hydraulic motor III, hydraulic motor IV, hydraulic motor V, hydraulic motor VI, conveyor motor I, conveyor motor II, a loading motor, a quick-connect coupling, a radiator, a filter, and an oil tank. The invention is characterized in that: the hydraulic pump station's oil circuit outlet is provided with three parallel control oil circuits; the first parallel oil circuit is connected to the relief valve, and the second parallel oil circuit is connected to the manual directional valve. The first oil port of the manual directional valve A is connected to the third oil circuit in parallel with the manual directional valve B. The manual directional valve A is a three-position six-way manual directional valve. The first oil port of the manual directional valve A is connected to the outlet of the second oil circuit in parallel. The second oil port of the manual directional valve A is connected to the outlet of the second oil circuit via a check valve. The third oil port of the manual directional valve A is connected to the return oil circuit. The fourth oil port of the manual directional valve A is connected to speed control valves A, B, C, and D. The fourth oil port of the manual directional valve A is also connected to the P inlet of speed control valve A. The A port of speed control valve A is connected to the sixth oil port of the manual directional valve A via a check valve and then connected to hydraulic motor I. Hydraulic motors III and V are then connected to the return oil circuit. The B port of speed control valve A is connected to the P inlet of speed control valve B. The A port of speed control valve B is connected to the 5th port of manual directional valve A via a check valve, then to hydraulic motors II, IV, and VI, and finally to the return oil circuit. The B port of speed control valve B is connected to the P inlet of speed control valve C. The A port of speed control valve C is connected to the feeding motor and then to the return oil circuit. The B port of speed control valve C is connected to the P inlet of speed control valve D. The A port of speed control valve D is connected to conveyor motor I via a quick-connect coupling and then to the return oil circuit via another quick-connect coupling. Speed ​​control valve D... Port B of the manual directional valve is connected to the conveyor motor II via a quick-connect coupling, and then to the return oil circuit via another quick-connect coupling. The manual directional valve B is a three-position, six-way manual directional valve. Port 1 of the manual directional valve B is connected to the outlet of the third oil circuit in parallel. Port 2 of the manual directional valve B is connected to the outlet of the third oil circuit via a check valve. Port 3 and Port 4 of the manual directional valve B are connected to the return oil circuit. Port 5 of the manual directional valve B is connected to the rodless chamber port of the telescopic cylinder via a throttle valve. Port 6 of the manual directional valve B is connected to the rod chamber port of the telescopic cylinder via a throttle valve. Port P of the overflow valve is connected to the outlet of the first oil circuit in parallel, and port T of the overflow valve is connected to the return oil circuit.

[0005] The oil return circuit is connected to the radiator, filter and oil tank.

[0006] Its working principle is as follows: The hydraulic control system uses a hydraulic pump station as a power source and sets up three parallel oil circuits. The first parallel oil circuit is connected to an overflow valve to stabilize the pressure of the entire hydraulic system and increase the reliability of the system.

[0007] The second parallel hydraulic circuit connects to a three-position six-way manual directional valve A to regulate the operation of various parts of the potato conveying and sorting machine. When the hydraulic system's hydraulic pump station is powered on, the feeding motor rotates normally, as do hydraulic motors I, II, III, IV, V, and VI, and conveying motors I and II, ensuring that all lines of the potato conveying and sorting machine can transport potatoes normally. Four speed control valves are connected in series in the hydraulic circuit to facilitate speed adjustment of each conveying line during operation. Speed ​​control valve A adjusts the speed of hydraulic motors I, III, and V; speed control valve B adjusts the speed of hydraulic motors II, IV, and VI; speed control valve C adjusts the speed of the feeding motor; and speed control valve D adjusts the speed of conveying motors I and II. When the circuits controlled by hydraulic motors I, III, and V become clogged or tangled, pressing down the A handle of the manual directional valve (connected in parallel) changes the hydraulic flow direction, directing all fluid to port B of manual directional valve A. This stops the feeding motor and conveyor motors I and II, while hydraulic motors II, IV, and VI remain stationary, and hydraulic motors I, III, and V accelerate. Conversely, when the circuits controlled by hydraulic motors II, IV, and VI become clogged or tangled, raising the A handle of manual directional valve changes the hydraulic flow direction, directing all fluid to port A of manual directional valve A. This again stops the feeding motor and conveyor motors I and II, while hydraulic motors I, III, and V remain stationary, and hydraulic motors II, IV, and VI accelerate. This controlled operation effectively avoids potato damage and poor impurity separation caused by clogging and tangling during potato sorting, laying a foundation for better storage quality after warehousing.

[0008] The third parallel hydraulic circuit connects to a three-position six-way manual directional valve B to control the extension and retraction of the hydraulic cylinders in the potato conveying and sorting machine. A throttle valve is connected in the circuit to control the cylinder's operating speed, and a double-hydraulic-controlled check valve ensures the stability of the hydraulic cylinder's extension and retraction position. The extension and retraction cylinder is mainly used to adjust the gap between the sorting rollers. When the handle of manual directional valve B is raised, the extension and retraction cylinder rises, increasing the gap between the sorting rollers; when the handle of manual directional valve B is pressed down, the extension and retraction cylinder descends, decreasing the gap between the sorting rollers. Adjusting the gap allows for the removal of soil clods and impurities from the potatoes, as well as the grading of the potatoes by size. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the hydraulic system of the present invention;

[0010] Figure 2 Schematic diagram of the working principle of lifting the manual directional valve A handle;

[0011] Figure 3 Schematic diagram of the working principle of manually reversing valve A when the handle is pressed down;

[0012] Figure 4 Schematic diagram of the working principle of manually reversing valve B handle being lifted;

[0013] Figure 5 Schematic diagram of the working principle of manually reversing valve B when the handle is pressed down;

[0014] 1. Hydraulic pump station 2. Filter 3. Radiator 4. Manual directional valve A 5. Manual directional valve B 6. Throttle valve

[0015] 7. Dual-hydraulic control check valve; 8. Telescopic cylinder; 9. Speed ​​control valve D; 10. Speed ​​control valve C; 11. Quick-connect coupling; 12. Conveyor motor I; 13. Conveyor motor II; 14. Feeding motor; 15. Hydraulic motor VI; 16. Hydraulic motor V; 17. Hydraulic motor IV

[0016] 18. Hydraulic motor III 19. Hydraulic motor II 20. Hydraulic motor I 21. Speed ​​control valve A 22. Speed ​​control valve B 23. Relief valve 24. Check valve 25. Oil tank Detailed Implementation

[0017] like Figure 1-5In the illustrated embodiment: the hydraulic pump station 1 has three parallel control oil circuits at its oil circuit outlet. The first oil circuit is connected to the overflow valve 23, the second oil circuit is connected to the manual directional valve A4, and the third oil circuit is connected to the manual directional valve B5. The manual directional valve A4 is a three-position six-way manual directional valve. The first port of the manual directional valve A4 is connected to the outlet of the parallel second oil circuit. The second port of the manual directional valve A4 is connected to the outlet of the second oil circuit via a check valve 24. The third port of the manual directional valve A4 is connected to the return oil circuit. The fourth port of the manual directional valve A4 is connected to speed control valves A21, B22, C10, and D9. The fourth port of the manual directional valve A4 is connected to the P inlet of speed control valve A21. The A port of speed control valve A21 is connected to the manual directional valve A5 via a check valve 24. After the sixth oil port of valve 5 is connected, it connects to hydraulic motors I20, III18, and V16, and then connects to the return oil circuit. The B oil port of speed control valve A is connected to the P oil inlet of speed control valve B22. The A oil port of speed control valve B22 is connected to the manual directional valve A5 via check valve 24. After the fifth oil port of valve 5 is connected, it connects to hydraulic motors II19, IV17, and VI15, and then connects to the return oil circuit. The B oil port of speed control valve B22 is connected to the P oil inlet of speed control valve C10. The A oil port of speed control valve C10 is connected to the feeding motor 14 and then connects to the return oil circuit. The B oil port of speed control valve C10 is connected to the P oil inlet of speed control valve D9. The A port of speed control valve D9 is connected to the conveyor motor I 12 via quick-connect coupling 11 and then to the return oil circuit via quick-connect coupling 11. The B port of speed control valve D9 is connected to the conveyor motor II 13 via quick-connect coupling 11 and then to the return oil circuit via quick-connect coupling 11. The manual directional valve B5 is a three-position six-way manual directional valve. The first port of manual directional valve B5 is connected to the outlet of the third oil circuit in parallel. The second port of manual directional valve B5 is connected to the outlet of the third oil circuit via check valve 24. The third port of manual directional valve B5 is connected to the return oil circuit. The fourth port of manual directional valve B5 is connected to the return oil circuit. The fifth port of manual directional valve B5 is connected to the rodless chamber port of telescopic cylinder 8 via throttle valve 6. The sixth port of manual directional valve B5 is connected to the rod chamber port of telescopic cylinder 8 via throttle valve 6.

[0018] The overflow valve 23P port is connected to the outlet of the first parallel oil circuit, and the overflow valve 23T port is connected to the return oil circuit. The return oil circuit connects the radiator 3, the filter 2, and the oil tank 25.

Claims

1. A hydraulic control system for a potato sorting machine, comprising a hydraulic pump station (1), an overflow valve (23), a manual directional valve A (4), a manual directional valve B (5), a throttle valve (6), a double-hydraulic control check valve (7), a telescopic cylinder (8), a speed control valve A (21), a speed control valve B (22), a speed control valve C (10), a speed control valve D (9), a hydraulic motor I (20), a hydraulic motor II (19), a hydraulic motor III (18), a hydraulic motor IV (17), a hydraulic motor V (16), a hydraulic motor VI (15), a conveying motor I (12), a conveying motor II (13), a feeding motor (14), a radiator (3), a filter (2), and an oil tank (25), characterized in that: The hydraulic pump station (1) has three parallel control oil circuits at its oil outlet. The first parallel oil circuit is connected to the overflow valve (23), the second parallel oil circuit is connected to the manual directional valve A (4), and the third parallel oil circuit is connected to the manual directional valve B (5). The manual directional valve A (4) is a three-position six-way manual directional valve. The first oil port of the manual directional valve A (4) is connected to the outlet of the second parallel oil circuit. The second oil port of the manual directional valve A (4) is connected to the outlet of the second oil circuit through the check valve I (24). The third oil port of the manual directional valve A (4) is connected to the return oil circuit, and the fourth oil port of the manual directional valve A (4) is connected to the speed control circuit. Valve A (21), speed control valve B (22), speed control valve C (10), speed control valve D (9), the 4th port of manual directional valve A (4) is connected to the P inlet of speed control valve A (21), the A port of speed control valve A (21) is connected to the 6th port of manual directional valve A (4) via check valve II, and then connected to hydraulic motor I (20), hydraulic motor III (18) and hydraulic motor V (16), and then connected to the return oil circuit, the B port of speed control valve A is connected to the P inlet of speed control valve B (22), the A port of speed control valve B (22) is connected to the 5th port of manual directional valve A (4) via check valve III, and then connected to hydraulic motor II (19). Hydraulic motors IV (17) and VI (15) are then connected to the return oil circuit. The B port of speed control valve B (22) is connected to the P inlet of speed control valve C (10). The A port of speed control valve C (10) is connected to the feeding motor (14) and then to the return oil circuit. The B port of speed control valve C (10) is connected to the P inlet of speed control valve D (9). The A port of speed control valve D (9) is connected to the conveying motor I (12) through quick-connect coupling I (11) and then to the return oil circuit through quick-connect coupling II. The B port of speed control valve D (9) is connected to the conveying motor II (13) through quick-connect coupling III and then to the return oil circuit through quick-connect coupling IV. The oil circuits are connected; the manual directional valve B (5) is a three-position six-way manual directional valve. The first oil port of the manual directional valve B (5) is connected to the third oil circuit outlet in parallel. The second oil port of the manual directional valve B (5) is connected to the third oil circuit outlet through the one-way valve IV. The third oil port of the manual directional valve B (5) is connected to the return oil circuit. The fourth oil port of the manual directional valve B (5) is connected to the return oil circuit. The fifth oil port of the manual directional valve B (5) is connected to the rodless chamber oil port of the telescopic cylinder (8) through the throttle valve (6). The sixth oil port of the manual directional valve B (5) is connected to the rod chamber oil port of the telescopic cylinder (8) through the throttle valve (6).

2. The hydraulic control system for the potato sorting machine according to claim 1, characterized in that: The overflow valve (23) P port is connected to the outlet of the first parallel oil circuit, and the overflow valve (23) T port is connected to the return oil circuit.

3. The hydraulic control system for the potato sorting machine according to any one of claims 1-2, characterized in that: The oil return circuit is connected to the radiator (3), filter (2) and oil tank (25).

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