A hydraulic system for round bale baling machine

Abstract

The utility model discloses a hydraulic system for a round bale baler, comprising a two-position two-way solenoid valve, a two-position three-way solenoid valve 1, and a two-position three-way solenoid valve 2, wherein the two-position three-way solenoid valve 1 comprises a first inlet, a second inlet, and a first outlet, the two-position two-way solenoid valve 1 comprises a third inlet, a second outlet, and the two-position three-way solenoid valve 2 comprises a fourth inlet, a fifth inlet, and a third outlet; the utility model controls the compactness of round bales by adjusting a proportional pressure-reducing solenoid valve, thereby realizing highly compact large round bales and saving costs for users; when a vehicle suddenly stalls, the first one-way valve can maintain pressure, so that the compactness of the round bales is not affected, and the machine can continue to pack normally after restarting, thereby reducing the waste of packaging film and labor costs.

Description

Technical Field

[0001] The utility model relates to a hydraulic system for a round bale baler. Background Art

[0002] With the continuous improvement of agricultural mechanization, round bale baling technology has been applied to many agricultural products, such as cotton baling by cotton pickers and round bale balers for crop forage. With the continuous popularization of this technology, users have higher and higher requirements for baling effect and quality, such as the requirements for the weight (volume, density) of finished bales and the uniformity of finished bales (involving the cost of baling materials, loading costs and transportation costs, etc.).

[0003] When the baler is working, some emergencies may occur, such as engine stalling. At this time, if the baling mechanism is in the process of baling, the compactness of the round bale will be affected, and the machine will not be able to continue working after restarting, resulting in a waste of baling film and labor costs. Utility Model Content

[0004] The purpose of the utility model is to solve the above deficiencies in the prior art and to provide a hydraulic system for a round bale baler.

[0005] A hydraulic system for a round bale baler, comprising a two-position two-way solenoid valve, a two-position three-way solenoid valve 1, and a two-position three-way solenoid valve 2, wherein the two-position three-way solenoid valve 1 comprises a first inlet, a second inlet, and a first outlet, the two-position two-way solenoid valve 1 comprises a third inlet, a second outlet, and the two-position three-way solenoid valve 2 comprises a fourth inlet, a fifth inlet, and a third outlet;

[0006] The first inlet is connected to the fifth inlet through the first oil circuit, the second inlet is connected to the hydraulic source through the second oil circuit, the first outlet is connected to the third inlet through the third oil circuit, the rod chamber of the oil cylinder is connected to the oil return tank through the fourth oil circuit, the fourth inlet is connected to the hydraulic source through the fifth oil circuit, the third outlet is connected to the fourth oil circuit through the sixth oil circuit, a first check valve is provided on the sixth oil circuit, the first check valve is connected to the hydraulic source through the seventh oil circuit, the oil return tank is connected to the first oil circuit through the eighth oil circuit, a second check valve is provided on the eighth oil circuit, and the second outlet is connected to the rodless chamber of the oil cylinder through the ninth oil circuit;

[0007] The two-position three-way solenoid valve includes a first position and a second position. In the first position, the first inlet is closed and the second inlet is connected to the first outlet; in the second position, the first inlet is connected to the first outlet and the second inlet is closed;

[0008] The two-position two-way solenoid valve comprises a first station and a second station, wherein the third inlet of the first station is connected to the second outlet; and the third inlet of the second station is connected to the second outlet, and the valve has a one-way cut-off function;

[0009] The two-position three-way solenoid valve 2 includes a first station and a second station. In the first station: the fourth inlet is closed, and the fifth inlet is connected to the third outlet; in the second station: the fourth inlet is connected to the third outlet, and the fifth inlet is closed.

[0010] Preferably, a pressure limiting valve is provided on the fourth oil circuit.

[0011] Preferably, the two-position three-way solenoid valve 2 is an electromagnetic proportional pressure reducing valve.

[0012] Beneficial effects: Compared with the prior art, the utility model controls the compactness of round bales by adjusting the proportional pressure reducing solenoid valve, thereby achieving highly compact large round bales and saving costs for users;

[0013] When the vehicle suddenly stalls, the first one-way valve can maintain pressure, so the compactness of the round bag is not affected. After the machine is restarted, it can continue to pack normally, thus reducing the waste of packaging film and labor costs;

[0014] The rod chamber oil channel, rodless chamber oil channel, two-position two-way solenoid valve, two-position three-way solenoid valve, proportional pressure reducing solenoid valve and the second one-way valve are combined to form a closed-loop design to achieve packaging stability, thereby achieving good stability of the mechanical rocker arm during the discharge of large-volume finished round bales from the equipment, avoiding the situation where the packaging film is scratched due to the instability of the mechanical rocker arm, ensuring that the finished cotton bales are stable in force and the round bales are uniform; at the same time, the pressure limiting valve protects the system.

[0015] In addition, a second one-way valve is used to prevent the rodless chamber from being sucked empty (the rodless chamber is the end of the cotton bale), thereby ensuring the stability of the rocker shaft (a structural component connected to the oil cylinder and used to press the cotton bale) during the discharge of the cotton bale, while also preventing the packaging film from being scratched. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of a hydraulic system for a round bale baler;

[0017] In the figure, 1, the first oil circuit, 2, the second oil circuit, 3, the third oil circuit, 4, the fourth oil circuit, 5, the fifth oil circuit, 6, the sixth oil circuit, 7, the seventh oil circuit, 8, the eighth oil circuit, 9, the ninth oil circuit, 10, two-position three-way solenoid valve one, 11, two-position two-way solenoid valve, 12, two-position three-way solenoid valve two, 13, pressure limiting valve, 14, first one-way valve, 15, second one-way valve. DETAILED DESCRIPTION

[0018] 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.

[0019] like Figure 1As shown, a first oil circuit 1, a second oil circuit 2, a third oil circuit 3, a fourth oil circuit 4, a fifth oil circuit 5, a sixth oil circuit 6, a seventh oil circuit 7, an eighth oil circuit 8, a ninth oil circuit 9, a two-position three-way solenoid valve 1 10, a two-position two-way solenoid valve 11, a two-position three-way solenoid valve 2 12, a pressure limiting valve 13, a first one-way valve 14, and a second one-way valve 15;

[0020] A hydraulic system for a round bale baler, comprising a two-position two-way solenoid valve 11, a two-position three-way solenoid valve 10, and a two-position three-way solenoid valve 2 12, wherein the two-position three-way solenoid valve 10 comprises a first inlet, a second inlet, and a first outlet, the two-position two-way solenoid valve 11 comprises a third inlet and a second outlet, and the two-position three-way solenoid valve 2 12 comprises a fourth inlet, a fifth inlet, and a third outlet;

[0021] The first inlet is connected to the fifth inlet through the first oil circuit 1, the second inlet is connected to the hydraulic source through the second oil circuit 2, the first outlet is connected to the third inlet through the third oil circuit 3, the rod chamber of the oil cylinder is connected to the return tank through the fourth oil circuit 4, the fourth inlet is connected to the hydraulic source through the fifth oil circuit 5, the third outlet is connected to the fourth oil circuit 4 through the sixth oil circuit 6, a pressure limiting valve 13 is provided on the fourth oil circuit 4, a first non-return valve 14 is provided on the sixth oil circuit 6, the first non-return valve 14 is connected to the hydraulic source through the seventh oil circuit 7, the return tank is connected to the first oil circuit 1 through the eighth oil circuit 8, the eighth oil circuit 8 is provided with a second non-return valve 15, the second outlet is connected to the rodless chamber of the oil cylinder through the ninth oil circuit 9, and the material bag is at the rodless chamber end;

[0022] The second one-way valve 15 has the following functions: preventing the rodless chamber from being sucked empty (the rodless chamber is the cotton bale end), ensuring the cotton bale discharge process, stabilizing the rocker shaft (a structural member connected to the oil cylinder and used to press the cotton bale), and avoiding the packaging film from being scratched.

[0023] The two-position three-way solenoid valve 10 includes a first position and a second position. In the first position, the first inlet is closed and the second inlet is connected to the first outlet; in the second position, the first inlet is connected to the first outlet and the second inlet is closed.

[0024] The two-position two-way solenoid valve 11 includes a first station and a second station, wherein the third inlet is connected to the second outlet at the first station; and the third inlet is connected to the second outlet at the second station, and has a one-way shutoff function;

[0025] The two-position three-way solenoid valve 2 12 includes a first position and a second position. In the first position, the fourth inlet is closed and the fifth inlet is connected to the third outlet. In the second position, the fourth inlet is connected to the third outlet and the fifth inlet is closed. The two-position three-way solenoid valve 2 12 is an electromagnetic proportional pressure reducing valve.

[0026] The hydraulic oil circuits inside each solenoid valve in this hydraulic system and the oil circuits outside the solenoid valve are detailed in Figure 1 .

[0027] Instructions for use: Start the baler to pack. During the packing process, as the cotton bales become larger, the two-position three-way solenoid valve 2 will work to gradually increase the pressure to make the cotton bales more compact. During the process of the two-position three-way solenoid valve 2 increasing the pressure, the two-position three-way solenoid valve 1 and the two-position two-way solenoid valve will not work;

[0028] When the cotton bale reaches the maximum size, that is, when the bale is completed, the baler will generally discharge the cotton. During this process, the rodless cavity will be sucked empty, causing the rocker shaft to shake. The second one-way valve can prevent this from happening, ensuring that when the cotton is discharged, the pressure in the oil circuit is sufficient to prevent the rocker shaft from shaking.

[0029] When the vehicle suddenly stalls, the first one-way valve can maintain pressure, so the compactness of the round bag is not affected. After the machine is restarted, it can continue to pack normally, thereby reducing the waste of packaging film and labor costs; the pressure limiting valve limits the maximum pressure in the oil circuit during the packaging process;

[0030] When the baler is not working, three solenoid valves control the lifting and lowering of the mechanism, which is used for debugging work before work.

[0031] 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 hydraulic system for a round bale baler, characterized in that: It includes a two-position two-way solenoid valve, a two-position three-way solenoid valve 1, and a two-position three-way solenoid valve 2, wherein the two-position three-way solenoid valve 1 includes a first inlet, a second inlet, and a first outlet, the two-position two-way solenoid valve 1 includes a third inlet and a second outlet, and the two-position three-way solenoid valve 2 includes a fourth inlet, a fifth inlet, and a third outlet; The first inlet is connected to the fifth inlet through the first oil circuit, the second inlet is connected to the hydraulic source through the second oil circuit, the first outlet is connected to the third inlet through the third oil circuit, the rod chamber of the oil cylinder is connected to the oil return tank through the fourth oil circuit, the fourth inlet is connected to the oil return tank through the fifth oil circuit, the third outlet is connected to the fourth oil circuit through the sixth oil circuit, a first check valve is provided on the sixth oil circuit, the first check valve is connected to the hydraulic source through the seventh oil circuit, the oil return tank is connected to the first oil circuit through the eighth oil circuit, a second check valve is provided on the eighth oil circuit, and the second outlet is connected to the rodless chamber of the oil cylinder through the ninth oil circuit; The two-position three-way solenoid valve comprises a first station and a second station. In the first station, the first inlet is closed and the second inlet is connected to the first outlet. In the second station, the first inlet is connected to the first outlet and the second inlet is closed. The two-position two-way solenoid valve comprises a first station and a second station, wherein the third inlet of the first station is connected to the second outlet; and the third inlet of the second station is connected to the second outlet, and the valve has a one-way cut-off function; The two-position three-way solenoid valve 2 comprises a first station and a second station. In the first station, the fourth inlet is closed and the fifth inlet is connected to the third outlet; in the second station, the fourth inlet is connected to the third outlet and the fifth inlet is closed.

2. A hydraulic system for a round bale baler according to claim 1, characterized in that: A pressure limiting valve is provided on the fourth oil circuit.

3. A hydraulic system for a round bale baler according to claim 1, characterized in that: The two-position three-way solenoid valve is an electromagnetic proportional pressure reducing valve.

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