Cotton box valve group structure of four-row cotton picker

Abstract

The utility model discloses a cotton box valve group structure of a four-row cotton picker, which comprises a plurality of working systems, a cotton box tilting system comprises a cotton box tilting oil cylinder, a first hydraulic oil way and a second hydraulic oil way, one end of the hydraulic oil way is connected with a rod cavity of the cotton box tilting oil cylinder, and the other end of the hydraulic oil way is connected with an oil return box. The second hydraulic oil way is connected with a rodless cavity of the cotton box inclined oil cylinder and provided with a first two-position two-way electromagnetic valve, the first two-position two-way electromagnetic valve is connected with the hydraulic source, one station of the first two-position two-way electromagnetic valve has the one-way stop function, and a liquid outlet of the first two-position two-way electromagnetic valve is connected with the hydraulic source. A second two-position two-way electromagnetic valve is arranged between the first two-position two-way electromagnetic valve and the first hydraulic oil way, one station of the second two-position two-way electromagnetic valve has a one-way stop function, a liquid outlet of the second two-position two-way electromagnetic valve is connected with the second hydraulic oil way, and a one-way valve is arranged between the first two-position two-way electromagnetic valve and the second two-position two-way electromagnetic valve. And a liquid outlet of the one-way valve is connected with a rodless cavity of the cotton box oil cylinder.

Description

Technical Field

[0001] The utility model relates to a cotton box valve group structure of a four-row cotton picker. Background Art

[0002] With the development of agricultural machinery technology, cotton pickers have gradually become an indispensable agricultural machinery equipment for cotton picking. They have the advantages of high cotton picking efficiency, saving labor costs, and reducing labor intensity.

[0003] After cotton is picked, it is put into a cotton box. However, due to the limited space in the cotton box and the soft cotton, the cotton will quickly fill up the cotton box as the picking progresses. At this time, the cotton in the cotton box needs to be dumped out in order to continue the work. In order to improve work efficiency and reduce cotton unloading time, a packing device is usually used to pack the cotton in the cotton box. When the cotton bales in the cotton box are packed from small bales to the largest bales, the cotton picker's film covering system is used to wrap the cotton bales, and then the back box of the cotton box is opened to throw out the cotton bales.

[0004] In order to realize the movement of the cotton picker, a hydraulic system is usually used for operation as a whole. However, in the existing technology, in order to meet the movement requirements of the cotton picker, the hydraulic system is relatively complicated, and its internal valve group is used too much, which brings a lot of trouble to the troubleshooting work when a failure occurs. Utility Model Content

[0005] The purpose of the utility model is to solve the above deficiencies in the prior art and to provide a cotton box valve group structure for a four-row cotton picker.

[0006] A cotton box valve group structure of a four-row cotton picker includes multiple working systems, including a cotton box tilting system, a cotton box extension system, a cotton box side door system, a hood system, a compactor motor system, a cotton box bottom motor system, and a cotton box door motor system;

[0007] The cotton box tilting system includes a cotton box tilting cylinder, a first hydraulic oil circuit, and a second hydraulic oil circuit. One end of the hydraulic oil circuit is connected to the rod chamber of the cotton box tilting cylinder, and the other end is connected to the return oil tank. The second hydraulic oil circuit is connected to the rodless chamber of the cotton box tilting cylinder. A two-position two-way solenoid valve 1 is provided on the second hydraulic oil circuit. The two-position two-way solenoid valve 1 is connected to the hydraulic source. One station of the two-position two-way solenoid valve 1 has a one-way cut-off function, and its outlet is connected to the hydraulic source.

[0008] A two-position two-way solenoid valve 2 is provided between the two-position two-way solenoid valve 1 and the first hydraulic oil circuit. One station of the two-position two-way solenoid valve 2 has a one-way cut-off function, and its outlet is connected to the second hydraulic oil circuit. A one-way valve is provided between the two-position two-way solenoid valve 1 and the two-position two-way solenoid valve 2, and the outlet of the one-way valve is connected to the rodless chamber of the cotton box cylinder.

[0009] In order to realize the tilting function, there are two tilting cylinders, and the second hydraulic oil circuit is divided into a first branch and a second branch through a one-way valve. The first branch and the second branch are respectively provided with a first diverter valve and a second diverter valve, and the first diverter valve and the second diverter valve are respectively connected to the second branch and the first branch.

[0010] The cotton box extension system includes a plurality of cotton box extension cylinders and a third hydraulic oil circuit, the third hydraulic oil circuit is connected to a rodless chamber of a cotton box extension cylinder, a two-position three-way solenoid valve 1 is provided on the third hydraulic oil circuit, and the two-position three-way solenoid valve 1 is connected to the oil return tank and the hydraulic source respectively;

[0011] A two-position two-way solenoid valve three is provided in series between the two-position three-way solenoid valve one and the rodless chamber. One station of the two-position two-way solenoid valve three is provided with a one-way cut-off function, and its liquid outlet is connected to the rodless chamber of the cotton box extension cylinder, and the rod chamber and rodless chamber of two adjacent cotton box extension cylinders are connected.

[0012] In order to open the cotton box side door, the cotton box side door system includes two cotton box side door cylinders, the fourth hydraulic oil circuit, and the fifth hydraulic oil circuit.

[0013] The fourth hydraulic oil circuit is connected to the rodless chamber of the cotton box side door cylinder. A three-position four-way solenoid valve is provided on the fourth hydraulic oil circuit. The middle position of the three-position four-way solenoid valve has an external control internal leakage function. The three-position four-way solenoid valve is respectively connected to the fifth hydraulic oil circuit, the hydraulic source, and the return oil tank. Both the fourth hydraulic oil circuit and the fifth hydraulic oil circuit are provided with a one-way valve. The outlet of the one-way valve is respectively connected to the rodless chamber and the rod chamber.

[0014] The fourth hydraulic oil circuit is divided into a third branch and a fourth branch through a one-way valve. The third branch and the fourth branch are respectively provided with a third diverter valve and a fourth diverter valve, and the third diverter valve and the fourth diverter valve are respectively connected to the fourth branch and the third branch.

[0015] In order to ensure the power of the compactor, the compactor motor system includes a first motor, a sixth hydraulic oil circuit, and a seventh hydraulic oil circuit. The sixth hydraulic oil circuit is respectively connected to the first motor and the return oil tank, the seventh hydraulic oil circuit is connected to the first motor, and a two-position two-way solenoid valve four is provided on the seventh hydraulic oil circuit. The two-position two-way solenoid valve four is connected to the hydraulic source, and one station of the two-position two-way solenoid valve four has a one-way cut-off function, and its outlet is connected to the first motor.

[0016] In order to ensure the normal operation of the hood system, the hood system includes a hood cylinder and an eighth hydraulic oil circuit. The eighth hydraulic oil circuit is connected to the rod chamber of the hood cylinder. A two-position three-way solenoid valve 2 is provided on the eighth hydraulic oil circuit. The two-position three-way solenoid valve 2 is respectively connected to the return oil tank and the hydraulic source. A two-position two-way solenoid valve 5 is provided on the eighth hydraulic oil circuit. One station of the two-position two-way solenoid valve 5 has a one-way cut-off function, and its liquid outlet is connected to the rod chamber of the hood cylinder.

[0017] In order to ensure the power of the working system on the bottom of the cotton box, the motor system on the bottom of the cotton box includes a second motor, a ninth hydraulic oil circuit, and a tenth hydraulic oil circuit. The ninth hydraulic oil circuit is respectively connected to the second motor and the return oil tank, and the tenth hydraulic oil circuit is connected to the second motor. A two-position two-way solenoid valve six is ​​arranged on the tenth hydraulic oil circuit. One station of the two-position two-way solenoid valve six has a one-way cut-off function, and its outlet is connected to the hydraulic source. The two-position two-way solenoid valve six is ​​connected to the hydraulic source.

[0018] A two-position two-way solenoid valve seven is provided on the tenth hydraulic oil circuit, and the two-position two-way solenoid valve seven includes a normally open position and a normally closed position.

[0019] In order to ensure the power to open the cotton box door, the cotton box door motor system includes a third motor, an eleventh hydraulic oil circuit, and a twelfth hydraulic oil circuit. The eleventh hydraulic oil circuit is respectively connected to the third motor and the oil return tank, and the twelfth hydraulic oil circuit is respectively connected to the third motor and a two-position two-way solenoid valve eight. The two-position two-way solenoid valve eight is connected to the hydraulic source. One station of the two-position two-way solenoid valve eight has a one-way cut-off function, and its outlet is connected to the hydraulic source.

[0020] A two-position two-way solenoid valve nine is provided on the twelfth hydraulic oil circuit, and the two-position two-way solenoid valve nine includes a normally open position and a normally closed position.

[0021] In order to detect the pressure in each system, pressure sensors are installed in the cotton box extension system, compactor motor system, cotton box floor motor system and cotton box door motor system.

[0022] Beneficial effects: Compared with the prior art, the utility model adopts two two-position two-way solenoid valves with one-way cut-off function to realize the reversing function, and at the same time can maintain the oil pressure in the cylinder cavity. The overall hydraulic system structure is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the cotton box valve group of a four-row cotton picker;

[0024] In the figure, 1, the first hydraulic oil circuit, 2, the first branch, 3, the second branch, 4, the second hydraulic oil circuit, 5, the cotton box tilt cylinder, 6, the one-way valve, 7, the two-position two-way solenoid valve 2, 8, the two-position two-way solenoid valve 1, 9, the cotton box extension cylinder, 10, the third hydraulic oil circuit, 11, the two-position three-way solenoid valve 1, 12, the two-position two-way solenoid valve 3, 13, the cotton box side door cylinder, 14, the third branch, 15, the fourth branch, 16, the fourth hydraulic oil circuit, 17, the fifth hydraulic oil circuit, 18, the three-position four-way solenoid valve, 19, the sixth hydraulic oil circuit, 20, the first motor, 2 1. The seventh hydraulic oil circuit, 22. Two-position two-way solenoid valve four, 23. Hood cylinder, 24. The eighth hydraulic oil circuit, 25. Two-position two-way solenoid valve five, 26. Two-position three-way solenoid valve two, 27. The ninth hydraulic oil circuit, 28. The second motor, 29. The tenth hydraulic oil circuit, 30. Two-position two-way solenoid valve six, 31. Two-position two-way solenoid valve seven, 32. The eleventh hydraulic oil circuit, 33. The third motor, 34. The twelfth hydraulic oil circuit, 35. Two-position two-way solenoid valve eight, 36. Two-position two-way solenoid valve nine, 37. Pressure sensor, 38. Hydraulic source, 39. Return tank. DETAILED DESCRIPTION

[0025] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with embodiments and drawings. The embodiments are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.

[0026] like Figure 1 As shown, the first hydraulic oil circuit 1, the first branch 2, the second branch 3, the second hydraulic oil circuit 4, the cotton box tilting cylinder 5, the one-way valve 6, the two-position two-way solenoid valve 2 7, the two-position two-way solenoid valve 1 8, the cotton box extension cylinder 9, the third hydraulic oil circuit 10, the two-position three-way solenoid valve 1 11, the two-position two-way solenoid valve 3 12, the cotton box side door cylinder 13, the third branch 14, the fourth branch 15, the fourth hydraulic oil circuit 16, the fifth hydraulic oil circuit 17, the three-position four-way solenoid valve 18, the sixth hydraulic oil circuit 19, the first motor 20, the seventh Hydraulic oil circuit 21, two-position two-way solenoid valve four 22, hood cylinder 23, eighth hydraulic oil circuit 24, two-position two-way solenoid valve five 25, two-position three-way solenoid valve two 26, ninth hydraulic oil circuit 27, second motor 28, tenth hydraulic oil circuit 29, two-position two-way solenoid valve six 30, two-position two-way solenoid valve seven 31, eleventh hydraulic oil circuit 32, third motor 33, twelfth hydraulic oil circuit 34, two-position two-way solenoid valve eight 35, two-position two-way solenoid valve nine 36, pressure sensor 37, hydraulic source 38, oil return tank 39;

[0027] A cotton box valve group structure of a four-row cotton picker includes multiple working systems, including a cotton box tilting system, a cotton box extension system, a cotton box side door system, a hood system, a compactor motor system, a cotton box bottom motor system, and a cotton box door motor system;

[0028] The cotton box tilting system includes a cotton box tilting cylinder 5, a first hydraulic oil circuit 1, and a second hydraulic oil circuit 4. One end of the hydraulic oil circuit is connected to the rod chamber of the cotton box tilting cylinder 5, and the other end is connected to the return oil tank 39. The second hydraulic oil circuit 4 is connected to the rodless chamber of the cotton box tilting cylinder 5. A two-position two-way solenoid valve 8 is provided on the second hydraulic oil circuit 4. The two-position two-way solenoid valve 8 is connected to the hydraulic source 38. One station of the two-position two-way solenoid valve 8 has a one-way cut-off function, and its outlet is connected to the hydraulic source 38.

[0029] A two-position two-way solenoid valve 27 is provided between the two-position two-way solenoid valve 18 and the first hydraulic oil circuit 1. One station of the two-position two-way solenoid valve 27 has a one-way cut-off function, and its outlet is connected to the second hydraulic oil circuit 4. A one-way valve 6 is provided between the two-position two-way solenoid valve 18 and the two-position two-way solenoid valve 27, and the outlet of the one-way valve 6 is connected to the rodless chamber of the cotton box cylinder.

[0030] In this embodiment, the number of tilt cylinders is two, and the second hydraulic oil circuit 4 is divided into a first branch 2 and a second branch 3 through a one-way valve 6. The first branch 2 and the second branch 3 are respectively provided with a first diverter valve and a second diverter valve, and the first diverter valve and the second diverter valve are respectively connected to the second branch 3 and the first branch 2.

[0031] In this embodiment, the cotton box extension system includes a plurality of cotton box extension cylinders 9 and a third hydraulic oil circuit 10. The third hydraulic oil circuit 10 is connected to a rodless chamber of a cotton box extension cylinder 9. A two-position three-way solenoid valve 11 is provided on the third hydraulic oil circuit 10. The two-position three-way solenoid valve 11 is connected to a return oil tank 39 and a hydraulic source 38, respectively.

[0032] A two-position two-way solenoid valve 12 is provided in series between the two-position three-way solenoid valve 11 and the rodless chamber. One station of the two-position two-way solenoid valve 12 is provided with a one-way cut-off function, and its liquid outlet is connected to the rodless chamber of the cotton box extension cylinder 9, and the rod chamber and rodless chamber of two adjacent cotton box extension cylinders 9 are connected.

[0033] In this embodiment, the cotton box side door system includes two cotton box side door cylinders 13, a fourth hydraulic oil circuit 16, and a fifth hydraulic oil circuit 17.

[0034] The fourth hydraulic oil circuit 16 is connected to the rodless chamber of the cotton box side door cylinder 13. A three-position four-way solenoid valve 18 is provided on the fourth hydraulic oil circuit 16. The middle position of the three-position four-way solenoid valve 18 has an external control internal leakage function. The three-position four-way solenoid valve 18 is respectively connected to the fifth hydraulic oil circuit 17, the hydraulic source 38, and the return oil tank 39. The fourth hydraulic oil circuit 16 and the fifth hydraulic oil circuit 17 are both provided with a one-way valve 6. The liquid outlet of the one-way valve 6 is respectively connected to the rodless chamber and the rod chamber.

[0035] The fourth hydraulic oil circuit 16 is divided into a third branch 14 and a fourth branch 15 through a one-way valve 6. The third branch 14 and the fourth branch 15 are respectively provided with a third diverter valve and a fourth diverter valve, and the third diverter valve and the fourth diverter valve are respectively connected to the fourth branch 15 and the third branch 14.

[0036] In this embodiment, the compactor motor system includes a first motor 20, a sixth hydraulic oil circuit 19, and a seventh hydraulic oil circuit 21. The sixth hydraulic oil circuit 19 is respectively connected to the first motor and the return oil tank 39, the seventh hydraulic oil circuit 21 is connected to the first motor 20, and the seventh hydraulic oil circuit 21 is provided with a two-position two-way solenoid valve four 22. The two-position two-way solenoid valve four 22 is connected to the hydraulic source 38. One station of the two-position two-way solenoid valve four 22 has a one-way cut-off function, and its outlet is connected to the first motor 20.

[0037] In this embodiment, the hood system includes a hood cylinder 23 and an eighth hydraulic oil circuit 24. The eighth hydraulic oil circuit 24 is connected to the rod chamber of the hood cylinder 23. A two-position three-way solenoid valve 2 26 is provided on the eighth hydraulic oil circuit 24. The two-position three-way solenoid valve 2 26 is respectively connected to the return oil tank 39 and the hydraulic source 38. A two-position two-way solenoid valve 5 25 is provided on the eighth hydraulic oil circuit 24. One station of the two-position two-way solenoid valve 5 25 has a one-way cut-off function, and its liquid outlet is connected to the rod chamber of the hood cylinder 23.

[0038] In this embodiment, the motor system of the cotton box bottom surface includes a second motor 28, a ninth hydraulic oil circuit 27, and a tenth hydraulic oil circuit 29. The ninth hydraulic oil circuit 27 is respectively connected to the second motor 28 and the return oil tank 39, and the tenth hydraulic oil circuit 29 is connected to the second motor 28. A two-position two-way solenoid valve six 30 is provided on the tenth hydraulic oil circuit 29. One station of the two-position two-way solenoid valve six 30 has a one-way cut-off function, and its outlet is connected to the hydraulic source 38. The two-position two-way solenoid valve six 30 is connected to the hydraulic source 38.

[0039] A two-position two-way solenoid valve 7 31 is provided on the tenth hydraulic oil circuit 29. The two-position two-way solenoid valve 7 31 includes a normally open position and a normally closed position.

[0040] In this embodiment, the cotton box door motor system includes a third motor 33, an eleventh hydraulic oil circuit 32, and a twelfth hydraulic oil circuit 34. The eleventh hydraulic oil circuit 32 is respectively connected to the third motor 33 and the return oil tank 39, and the twelfth hydraulic oil circuit 34 is respectively connected to the third motor 33 and a two-position two-way solenoid valve eight 35. The two-position two-way solenoid valve eight 35 is connected to the hydraulic source 38. One station of the two-position two-way solenoid valve eight 35 has a one-way cut-off function, and its outlet is connected to the hydraulic source 38.

[0041] The twelfth hydraulic oil circuit 34 is provided with a two-position two-way solenoid valve nine 36, and the two-position two-way solenoid valve nine 36 includes a normally open position and a normally closed position.

[0042] In this embodiment, pressure sensors 37 are provided in the cotton box extension system, the compactor motor system, the cotton box floor motor system, and the cotton box door motor system.

[0043] Working principle: The oil enters the valve body from the inlet and is energized through the solenoid valve to complete some hydraulic functions of the four-row machine of the cotton picker. The two-position two-way solenoid valve with a one-way shut-off function can ensure the oil pressure in the cylinder.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A cotton box valve group structure of a four-row cotton picker, characterized in that: It includes multiple working systems, including a cotton box tilting system, a cotton box extension system, a cotton box side door system, a hood system, a compactor motor system, a cotton box bottom motor system, and a cotton box door motor system; The cotton box tilting system comprises a cotton box tilting cylinder, a first hydraulic oil circuit, and a second hydraulic oil circuit. One end of the hydraulic oil circuit is connected to the rod chamber of the cotton box tilting cylinder, and the other end is connected to the return oil tank. The second hydraulic oil circuit is connected to the rodless chamber of the cotton box tilting cylinder. A two-position two-way solenoid valve 1 is provided on the second hydraulic oil circuit. The two-position two-way solenoid valve 1 is connected to a hydraulic source. One station of the two-position two-way solenoid valve 1 has a one-way cut-off function, and its liquid outlet is connected to the hydraulic source. A two-position two-way solenoid valve 2 is provided between the two-position two-way solenoid valve 1 and the first hydraulic oil circuit. One station of the two-position two-way solenoid valve 2 has a one-way cut-off function, and its outlet is connected to the second hydraulic oil circuit. A one-way valve is provided between the two-position two-way solenoid valve 1 and the two-position two-way solenoid valve 2, and the outlet of the one-way valve is connected to the rodless chamber of the cotton box cylinder.

2. The cotton box valve group structure of a four-row cotton picker according to claim 1 is characterized in that: There are two tilt cylinders, and the second hydraulic oil circuit is divided into a first branch and a second branch through a one-way valve. The first branch and the second branch are respectively provided with a first diverter valve and a second diverter valve, and the first diverter valve and the second diverter valve are respectively connected to the second branch and the first branch.

3. The cotton box valve group structure of a four-row cotton picker according to claim 1 is characterized in that: The cotton box extension system includes a plurality of cotton box extension cylinders and a third hydraulic oil circuit. The third hydraulic oil circuit is connected to a rodless chamber of a cotton box extension cylinder. A two-position three-way solenoid valve is provided on the third hydraulic oil circuit. The two-position three-way solenoid valve is connected to the oil return tank and the hydraulic source respectively. A two-position two-way solenoid valve three is provided in series between the two-position three-way solenoid valve one and the rodless chamber. One station of the two-position two-way solenoid valve three is provided with a one-way cut-off function, and its liquid outlet is connected to the rodless chamber of the cotton box extension cylinder, and the rod chamber and rodless chamber of two adjacent cotton box extension cylinders are connected.

4. The cotton box valve group structure of a four-row cotton picker according to claim 1 is characterized in that: The cotton box side door system includes two cotton box side door cylinders, a fourth hydraulic oil circuit, and a fifth hydraulic oil circuit. The fourth hydraulic oil circuit is connected to the rodless chamber of the cotton box side door cylinder, and a three-position four-way solenoid valve is arranged on the fourth hydraulic oil circuit. The middle position of the three-position four-way solenoid valve has an external control internal leakage function. The three-position four-way solenoid valve is respectively connected to the fifth hydraulic oil circuit, the hydraulic source, and the return oil tank. Both the fourth hydraulic oil circuit and the fifth hydraulic oil circuit are provided with a one-way valve, and the liquid outlet of the one-way valve is respectively connected to the rodless chamber and the rod chamber. The fourth hydraulic oil circuit is divided into a third branch and a fourth branch through a one-way valve. The third branch and the fourth branch are respectively provided with a third diverter valve and a fourth diverter valve. The third diverter valve and the fourth diverter valve are respectively connected to the fourth branch and the third branch.

5. The cotton box valve group structure of a four-row cotton picker according to claim 1 is characterized in that: The compactor motor system includes a first motor, a sixth hydraulic oil circuit, and a seventh hydraulic oil circuit. The sixth hydraulic oil circuit is respectively connected to the first motor and the return oil tank, and the seventh hydraulic oil circuit is connected to the first motor. A two-position two-way solenoid valve four is provided on the seventh hydraulic oil circuit. The two-position two-way solenoid valve four is connected to the hydraulic source, and one station of the two-position two-way solenoid valve four has a one-way cut-off function, and its outlet is connected to the first motor.

6. The cotton box valve group structure of a four-row cotton picker according to claim 1, characterized in that: The hood system includes a hood cylinder and an eighth hydraulic oil circuit. The eighth hydraulic oil circuit is connected to the rod chamber of the hood cylinder. A two-position three-way solenoid valve 2 is provided on the eighth hydraulic oil circuit. The two-position three-way solenoid valve 2 is respectively connected to the return oil tank and the hydraulic source. A two-position two-way solenoid valve 5 is provided on the eighth hydraulic oil circuit. One station of the two-position two-way solenoid valve 5 has a one-way cut-off function, and its liquid outlet is connected to the rod chamber of the hood cylinder.

7. The cotton box valve group structure of a four-row cotton picker according to claim 1, characterized in that: The motor system of the bottom surface of the cotton box includes a second motor, a ninth hydraulic oil circuit, and a tenth hydraulic oil circuit. The ninth hydraulic oil circuit is respectively connected to the second motor and the oil return tank, and the tenth hydraulic oil circuit is connected to the second motor. A two-position two-way solenoid valve six is ​​arranged on the tenth hydraulic oil circuit. One station of the two-position two-way solenoid valve six has a one-way cut-off function, and its outlet is connected to the hydraulic source. The two-position two-way solenoid valve six is ​​connected to the hydraulic source. The tenth hydraulic oil circuit is provided with a two-position two-way solenoid valve seven, and the two-position two-way solenoid valve seven includes a normally open position and a normally closed position.

8. The cotton box valve group structure of a four-row cotton picker according to claim 1, characterized in that: The cotton box door motor system includes a third motor, an eleventh hydraulic oil circuit, and a twelfth hydraulic oil circuit. The eleventh hydraulic oil circuit is respectively connected to the third motor and the oil return tank, and the twelfth hydraulic oil circuit is respectively connected to the third motor and a two-position two-way solenoid valve eight. The two-position two-way solenoid valve eight is connected to a hydraulic source. One station of the two-position two-way solenoid valve eight has a one-way cut-off function, and its outlet is connected to the hydraulic source. The twelfth hydraulic oil circuit is provided with a two-position two-way solenoid valve nine, and the two-position two-way solenoid valve nine includes a normally open position and a normally closed position.

9. The cotton box valve group structure of a four-row cotton picker according to claim 1, characterized in that: The cotton box extension system, the compactor motor system, the cotton box floor motor system and the cotton box door motor system are all provided with pressure sensors.

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