Hydraulic control system of square bundle cotton picking packer and control method of hydraulic control system

Abstract

The invention provides a hydraulic control system of a square bundle cotton picking packer and a control method of the hydraulic control system. The hydraulic control system comprises a first double pump, a second double pump, a plurality of film winding and breaking loops, a plurality of film winding and breaking loops, a plurality of film winding and breaking loops and a plurality of film winding and breaking loops, wherein the first double pump and the second double pump are arranged on the square bundle cotton picking packer; each winding and breaking film loop comprises a first oil conveying pipeline communicated with the first duplex pump, a first working part connected with the first oil conveying pipeline and a winding and breaking film valve group arranged on the first oil conveying pipeline; each packaging loop comprises a second oil conveying pipeline communicated with the second duplex pump, a second working part connected with the second oil conveying pipeline and a packaging valve group arranged on the second oil conveying pipeline; and the controller is electrically connected to the first double pump, the second double pump, the wrapping and breaking film valve group and the packing valve group, and is used for controlling the output displacement of the first double pump and the second double pump to the pressure oil and controlling the opening degree of the wrapping and breaking film valve group and the packing valve group according to the quantitative parameters of the cotton.

Description

Technical Field

[0001] This disclosure relates to the technical field of hydraulic control, and more specifically, to a hydraulic control system and control method for a square-bundle cotton picking and baling machine. Background Technology

[0002] In areas with small plots of land, large cotton balers are unsuitable for cotton harvesting due to their wide wheelbase and large turning radius, while small plots (e.g., less than 5 mu) require three-point turning. Furthermore, the hydraulic systems of large cotton balers, in pursuit of high power, typically employ large-displacement single-pump or complex multi-pump systems, resulting in a large overall hydraulic system size, redundant piping, high energy consumption, and low integration. This directly conflicts with the lightweight and compact design principles required for "small-plot-suitable models," making it difficult to meet the high-efficiency operation needs of small plots. Moreover, most existing hydraulic systems are open-loop manual, lacking real-time monitoring and adjustment during cotton compression, leading to large pressure fluctuations and uneven density within the compressed cotton bales, with deviations typically exceeding ±5%. Summary of the Invention

[0003] To address at least one of the technical problems in the prior art, this disclosure provides a hydraulic control system and control method for a square-bundle cotton picking and baling machine, reducing the volume of the hydraulic system of the square-bundle cotton picking and baling machine, lowering energy consumption, and meeting the operational needs of efficient cotton picking in small plots of land.

[0004] The embodiments of this disclosure provide a hydraulic control system for a square-bundle cotton picking and baling machine, including: a first double pump and a second double pump disposed on the machine, for outputting pressure oil of different displacements; multiple winding-breaking membrane circuits, each of the winding-breaking membrane circuits including a first oil delivery pipe connected to the first double pump, a first working component connected to the first oil delivery pipe, and a winding-breaking membrane valve group disposed on the first oil delivery pipe; multiple baling circuits, each of the baling circuits including a second oil delivery pipe connected to the second double pump, a second working component connected to the second oil delivery pipe, and a baling valve group disposed on the second oil delivery pipe, the multiple first working components and the multiple second... Driven by the pressure oil output from the first and second dual pumps respectively, the working components pack the collected cotton into square bundles according to the packing process. The controller is electrically connected to the first and second dual pumps, the winding-off membrane valve group, and the packing valve group. It is used to control the output displacement of the pressure oil from the first and second dual pumps according to the quantitative parameters of the cotton, and to control the opening degree of the winding-off membrane valve group and the packing valve group, so as to control the flow rate of pressure oil flowing through the multiple winding-off membrane circuits and the multiple packing circuits respectively, thereby controlling the working power of the multiple first working components and the multiple second working components respectively.

[0005] According to some embodiments of this disclosure, the plurality of baling circuits include a plurality of baling cylinders, which are used to compress the cotton in the baling chamber into a square shape when the collected cotton is conveyed to the baling chamber of the square cotton harvesting and baling machine; the wrapping circuit includes a wrapping motor, which is used to wrap the square cotton into the square bundle using film material; the controller is further used to control the flow rate of the pressure oil flowing through the wrapping circuit according to the compression speed of the plurality of baling cylinders and the quantitative parameters, so as to control the working power of the wrapping motor, so as to wrap the square cotton of different sizes compressed by the plurality of baling cylinders at different speeds into the square bundle.

[0006] According to some embodiments of this disclosure, when the cotton enters the baling chamber, the square baler enters the baling state; the quantitative parameters include at least one parameter of feed rate or humidity; the hydraulic control system of the square baler further includes at least one device, either a seed cotton flow sensor or a microwave humidity meter, installed in the square baler; the seed cotton flow sensor is used to detect the feed rate of the cotton in the cotton collection box of the square baler, and the microwave humidity meter is used to detect the humidity of the cotton in the baling chamber; the controller is electrically connected to the at least one device and is also used to control the output displacement of the first double pump and the second double pump according to the at least one parameter received from the at least one device when the square baler is in the baling state.

[0007] According to some embodiments of this disclosure, the plurality of the aforementioned first working components include a baffle cylinder, the aforementioned wrapping motor, the aforementioned film-cutting cylinder, and the aforementioned auger motor; the plurality of the aforementioned first oil delivery pipes include a baffle cylinder oil delivery pipe, a wrapping motor oil delivery pipe, a film-cutting cylinder oil delivery pipe, and an auger motor oil delivery pipe; the aforementioned wrapping and film-cutting valve assembly includes a plurality of solenoid directional valves, a plurality of throttle valves, and a plurality of hydraulically controlled check valves; the aforementioned plurality of solenoid directional valves include a baffle cylinder solenoid valve, a wrapping motor solenoid valve, and a film-cutting cylinder solenoid valve. The above-mentioned multiple throttle valves include a film-wrapping motor throttle valve and an auger motor throttle valve; the above-mentioned multiple hydraulically controlled check valves include a baffle cylinder check valve and a film-cutting cylinder check valve; the above-mentioned multiple film-wrapping and cutting circuits include: a baffle cylinder circuit, including the above-mentioned baffle cylinder, the above-mentioned baffle cylinder oil supply pipe, the above-mentioned baffle cylinder solenoid valve and the above-mentioned baffle cylinder check valve, the above-mentioned baffle cylinder is connected to a baffle disposed between the above-mentioned cotton collection box and the above-mentioned pressing chamber, so as to drive the above-mentioned baffle to rise or The descent allows cotton from the cotton collection box to enter the baling chamber, or prevents cotton in the baling chamber from flowing back into the cotton collection box; the wrapping motor circuit includes the wrapping motor, the wrapping motor oil supply pipe, the wrapping motor solenoid valve, and the wrapping motor throttle valve. The wrapping motor is connected to a rotating frame located at the outlet end of the baling chamber to drive the rotating frame to wrap the square cotton into square bales; the film-cutting cylinder circuit includes the film-cutting cylinder, the film-cutting cylinder oil supply pipe, the film-cutting cylinder solenoid valve, and the film-cutting cylinder check valve. The film-cutting cylinder is connected to a cutting component located at the outlet end of the baling chamber to drive the cutting component to cut the film; the auger motor circuit includes the auger motor, the auger motor oil supply pipe, the auger motor solenoid valve, and the auger motor throttle valve. The auger motor is located in the cotton collection box to push the cotton in the cotton collection box into the baling chamber.

[0008] According to some embodiments of this disclosure, the controller is further configured to perform at least one of the following operations: controlling the extension and retraction of the baffle cylinder by controlling the opening degree of the baffle cylinder solenoid valve, and controlling the stable state of the baffle cylinder under sudden pressure changes in the hydraulic control system by controlling the opening degree of the baffle cylinder check valve; controlling the starting state of the wrapping motor by controlling the opening degree of the wrapping motor solenoid valve, and controlling the working power of the wrapping motor by controlling the opening degree of the wrapping motor throttle valve; controlling the extension and retraction of the film-cutting cylinder by controlling the opening degree of the film-cutting cylinder solenoid valve, and controlling the stable state of the film-cutting cylinder under sudden pressure changes in the hydraulic control system by controlling the opening degree of the film-cutting cylinder check valve; controlling the starting state of the auger motor by controlling the opening degree of the auger motor solenoid valve, and controlling the rotational speed of the auger motor by controlling the opening degree of the auger motor throttle valve.

[0009] According to some embodiments of this disclosure, the controller is further configured to: control the flow rate of pressurized oil flowing through the auger motor circuit according to the quantitative parameters of the cotton, so as to control the rotation speed of the auger motor, thereby controlling the tilt angle of the push swashplate driven by the auger motor, so that the push swashplate can push the collected cotton to the baling chamber.

[0010] According to some embodiments of this disclosure, the plurality of the aforementioned second working components include a lateral compression cylinder, a vertical compression cylinder, and an ejection cylinder; the plurality of the aforementioned second oil supply pipes include a lateral cylinder oil supply pipe, a vertical cylinder oil supply pipe, and an ejection cylinder oil supply pipe; the aforementioned packaging valve assembly includes a plurality of hydraulically controlled directional valves; the plurality of hydraulically controlled directional valves include a lateral cylinder directional valve, a vertical cylinder directional valve, and an ejection cylinder directional valve; the aforementioned plurality of packaging cylinder circuits include: a lateral compression cylinder circuit, including the aforementioned lateral compression cylinder, the aforementioned lateral cylinder oil supply pipe, and the aforementioned lateral cylinder directional valve, wherein the lateral compression... The hydraulic cylinder is connected to the first pressure plate disposed in the baling chamber to drive the first pressure plate to compress the cotton laterally; the vertical compression hydraulic cylinder circuit includes the vertical compression hydraulic cylinder, the vertical hydraulic cylinder oil supply pipe and the vertical hydraulic cylinder reversing valve, the vertical compression hydraulic cylinder is connected to the second pressure plate disposed in the baling chamber to drive the second pressure plate to compress the cotton vertically; the ejection hydraulic cylinder circuit includes the ejection hydraulic cylinder, the ejection hydraulic cylinder oil supply pipe and the ejection hydraulic cylinder reversing valve, the ejection hydraulic cylinder is disposed in the baling chamber to eject the square-bundled cotton from the baling chamber.

[0011] According to some embodiments of this disclosure, the controller is also used to perform at least one of the following operations: controlling the extension and retraction of the lateral compression cylinder by controlling the opening degree of the lateral cylinder reversing valve; controlling the extension and retraction of the vertical compression cylinder by controlling the opening degree of the vertical cylinder reversing valve; and controlling the extension and retraction of the ejection cylinder by controlling the opening degree of the ejection cylinder reversing valve.

[0012] According to some embodiments of this disclosure, the hydraulic control system of the square baler cotton harvesting and baling machine further includes a first oil supply pipe and a first oil return pipe disposed in the square baler cotton harvesting and baling machine; the second output end of the first double pump is connected to the first oil supply pipe, and the first oil supply pipe is connected to the plurality of first oil delivery pipes; the input end of the first double pump is connected to the first oil return pipe, so that the first double pump inputs the pressure oil to the first oil supply pipe and recovers the pressure oil from the first oil return pipe; the plurality of winding membrane circuits are connected in parallel between the first oil supply pipe and the first oil return pipe.

[0013] According to some embodiments of this disclosure, the first return oil pipeline includes an overflow valve and an electro-proportional switching valve; the overflow valve is used to transfer pressurized oil from the first supply oil pipeline to the first return oil pipeline to unload the pressurized oil when the controller starts the first dual pump, or to transfer the abnormal pressurized oil to the first return oil pipeline to unload the pressurized oil when the oil pressure of the first supply oil pipeline of the multiple tangled diaphragm circuits is abnormal; the electro-proportional switching valve is used to control the flow rate of the unloaded pressurized oil based on its own opening degree under the control of the controller.

[0014] According to some embodiments of this disclosure, the hydraulic control system of the square baler cotton picking and baling machine further includes a second oil supply pipe and a second oil return pipe disposed in the square baler cotton picking and baling machine; the second output end of the second double pump is connected to the second oil supply pipe, and the second oil supply pipe is connected to the plurality of second oil delivery pipes; the input end of the second double pump is connected to the second oil return pipe, so that the second double pump inputs the pressure oil to the second oil supply pipe and recovers the pressure oil from the second oil return pipe; the plurality of baling circuits are connected in parallel between the second oil supply pipe and the second oil return pipe.

[0015] According to some embodiments of this disclosure, the second oil supply pipeline includes an electromagnetic relief valve to set a safety pressure when the controller starts the second dual pump.

[0016] According to some embodiments of this disclosure, the hydraulic control system of the square baler cotton picking and baling machine further includes a third oil supply pipeline disposed in the square baler cotton picking and baling machine; the first output end of the first double pump is connected to the third oil supply pipeline, and the third oil supply pipeline is connected to the plurality of second oil supply pipelines through a transition check valve, so that the first double pump can assist in inputting the pressure oil to the plurality of second oil supply pipelines.

[0017] According to some embodiments of this disclosure, the hydraulic control system of the square baler cotton picking and baling machine further includes a fourth oil supply pipe disposed in the square baler cotton picking and baling machine; the first output end of the second double pump is connected to the fourth oil supply pipe, and the fourth oil supply pipe includes an unloading valve; the unloading valve is used to transmit pressure oil from the fourth oil supply pipe to the second return oil pipe to unload the pressure oil when the controller starts the second double pump, or to transmit the abnormal pressure oil to the second return oil pipe to unload the pressure oil when the oil pressure of the second oil supply pipe of the multiple baling circuits is abnormal.

[0018] According to some embodiments of another aspect of this disclosure, a control method for the hydraulic control system of the above-mentioned square-bundle cotton baling machine is also provided, comprising: detecting the quantitative parameters of cotton; controlling the output displacement of the first double pump and the second double pump to the pressure oil according to the quantitative parameters of the cotton, and controlling the opening degree of the winding-breaking membrane valve group and the baling valve group, so as to control the flow rate of the pressure oil flowing through the multiple winding-breaking membrane circuits and the multiple baling circuits respectively, thereby controlling the working power of the multiple first working parts and the multiple second working parts respectively.

[0019] The hydraulic control system and control method of the square-bundle cotton picking and baling machine according to embodiments of this disclosure include a first double pump and a second double pump, multiple film-breaking circuits, multiple baling circuits, and a controller. By using the first and second double pumps as power sources, the volume of the hydraulic system of the square-bundle cotton picking and baling machine is reduced. The controller controls the output displacement of the pressure oil by the first and second double pumps according to the quantitative parameters of the cotton, and controls the opening degree of the film-breaking valve group and the baling valve group, so as to control the flow rate of pressure oil flowing through the multiple film-breaking circuits and the multiple baling circuits respectively, thereby controlling the working power of the multiple first working parts and the multiple second working parts respectively. In this way, real-time monitoring and adjustment of the different working energy consumption of each working part can be performed, reducing energy consumption and meeting the operational needs of efficient cotton picking in small plots of land. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the hydraulic control system of a square-bundle cotton baling machine according to an illustrative embodiment of the present disclosure;

[0021] Figure 2 This is a partial perspective view of a square-bundle cotton baling machine according to an illustrative embodiment of the present disclosure;

[0022] Figure 3 This is an action control logic diagram of a hydraulic control system according to an illustrative embodiment of the present disclosure;

[0023] Figure 4 This is a sequential logic diagram of a hydraulic control system according to an illustrative embodiment of the present disclosure;

[0024] Figure 5 This is a flowchart of a control method for a hydraulic control system applied to a square-bundle cotton baling machine according to an illustrative embodiment of the present disclosure.

[0025] The meanings of the reference numerals in the attached figure are as follows:

[0026] 1. First double pump;

[0027] 2. Electro-proportional switching valve;

[0028] 3. Overflow valve;

[0029] 4. Second double pump;

[0030] 5. Unloading valve;

[0031] 6. Electromagnetic relief valve;

[0032] 7. First check valve;

[0033] 8. Second check valve;

[0034] 9. Push out the hydraulic cylinder reversing valve;

[0035] 10. Vertical hydraulic cylinder directional valve;

[0036] 11. Lateral hydraulic cylinder reversing valve;

[0037] 12. Screw motor solenoid valve;

[0038] 13. Screw motor throttle valve;

[0039] 14. Solenoid valve for diaphragm-breaking cylinder;

[0040] 15. One-way valve for the diaphragm-breaking cylinder;

[0041] 16. Solenoid valve for wrapping motor;

[0042] 17. Throttling valve for the wrapping motor;

[0043] 18. Baffle cylinder solenoid valve;

[0044] 19. One-way valve for baffle cylinder;

[0045] 20. Baffle cylinder;

[0046] 21. Wrapping motor;

[0047] 22. Film-cutting hydraulic cylinder;

[0048] 23. Screw motor;

[0049] 24. Lateral compression cylinder;

[0050] 25. Vertical compression cylinder;

[0051] 26. Push out the hydraulic cylinder;

[0052] 27. Transition check valve;

[0053] 28. Electromagnetic relief valve;

[0054] 29. The last package is pushed out of the hydraulic cylinder. Detailed Implementation

[0055] The embodiments of the present disclosure will now be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the disclosure. In the following detailed description, numerous specific details are set forth to provide a thorough understanding of the embodiments of the present disclosure for ease of explanation. However, it will be apparent that one or more embodiments may be practiced without these specific details. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concepts of the present disclosure.

[0056] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this disclosure. The terms “comprising,” “including,” etc., as used herein indicate the presence of the stated features, steps, operations, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, or components.

[0057] All terms used herein (including technical and scientific terms) have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein are to be interpreted in a manner consistent with the context of this specification, and not in an idealized or overly rigid way.

[0058] When using expressions such as "at least one of A, B, and C," the expression should generally be interpreted in accordance with the meaning commonly understood by a person skilled in the art (e.g., "a system having at least one of A, B, and C" should include, but is not limited to, systems having A alone, having B alone, having C alone, having A and B, having A and C, having B and C, and / or having A, B, and C, etc.). When using expressions such as "at least one of A, B, or C," the expression should generally be interpreted in accordance with the meaning commonly understood by a person skilled in the art (e.g., "a system having at least one of A, B, or C" should include, but is not limited to, systems having A alone, having B alone, having C alone, having A and B, having A and C, having B and C, and / or having A, B, and C, etc.).

[0059] Figure 1 This is a schematic diagram of the hydraulic control system of a square-bundle cotton baling machine according to an illustrative embodiment of the present disclosure.

[0060] A hydraulic control system for a square-bundle cotton baling machine provided according to embodiments of this disclosure, such as... Figure 1 As shown, the system includes a first double pump 1 and a second double pump 4, multiple wrapping film circuits, multiple baling circuits, and a controller, all mounted on a square-bundle cotton baler. The first double pump 1 and the second double pump 4 output pressurized oil at different displacements. Each of the multiple wrapping film circuits includes a first oil delivery pipe connected to the first double pump 1, a first working component connected to the first oil delivery pipe, and a wrapping film valve assembly located on the first oil delivery pipe. Each of the multiple baling circuits includes a second oil delivery pipe connected to the second double pump 4, a second working component connected to the second oil delivery pipe, and a baling valve assembly located on the second oil delivery pipe. Driven by the pressurized oil output from the first double pump 1 and the pressurized oil output from the second double pump 4, the multiple first working components and the multiple second working components bale the collected cotton into square bales according to the baling process. The controller is electrically connected to the first double pump 1, the second double pump 4, the winding-off membrane valve group, and the baling valve group. It is used to control the output displacement of the first double pump 1 and the second double pump 4 to the pressure oil according to the quantitative parameters of the cotton, and to control the opening degree of the winding-off membrane valve group and the baling valve group, so as to control the flow rate of the pressure oil flowing through multiple winding-off membrane circuits and multiple baling circuits respectively, thereby controlling the working power of multiple first working parts and multiple second working parts respectively.

[0061] In some illustrative embodiments, the output displacement of the first tandem pump 1 is less than the output displacement of the second tandem pump 4.

[0062] In this implementation, the first tandem pump 1 and the second tandem pump 4 work together, with the second tandem pump 4 connected to the baling valve assembly via multiple second oil pipelines. The baling valve assembly, acting as the core hub, directs pressurized oil to multiple second working components, enabling the compression and baling of the cotton. Simultaneously, the membrane-breaking valve assembly receives pressurized oil from the first tandem pump 1, systematically controlling the multiple first working components to wind and cut the baling film, as well as assisting in the baling process. The hydraulic control system, through the membrane-breaking valve assembly and the baling valve assembly, regulates pressure and controls flow, ensuring that each working component operates collaboratively as needed, efficiently completing the entire cotton baling process.

[0063] Based on this, by using the first double pump 1 and the second double pump 4 as power sources, the volume of the hydraulic system of the square cotton baler is reduced, meeting the design principles of lightweight and compactness in small-plot areas. The controller, based on the cotton's quantitative parameters, controls the output displacement of the pressurized oil by the first double pump 1 and the second double pump 4, and also controls the opening degree of the wrapping film valve group and the baling valve group. This allows for separate control of the pressurized oil flow through multiple wrapping film circuits and multiple baling circuits, thereby controlling the working power of each of the multiple first working components and multiple second working components. In this way, real-time monitoring and adjustment of the different working energy consumption of each working component can be achieved, reducing energy consumption and meeting the operational needs of efficient cotton harvesting in small-plot areas.

[0064] According to embodiments of this disclosure, multiple baling circuits include multiple baling cylinders. These cylinders compress the cotton in the baling chamber into square shapes when the collected cotton is conveyed to the baling chamber of the square-bundle cotton baler. A wrapping circuit includes a wrapping motor 21, which uses film material to wrap the square cotton into square bales. A controller is further configured to control the flow rate of pressurized oil through the wrapping circuit based on the compression speed and quantification parameters of the multiple baling cylinders, thereby controlling the operating power of the wrapping motor 21 to wrap square cotton of different sizes compressed at different speeds by the multiple baling cylinders into square bales.

[0065] Specifically, when the compression speed is relatively fast and the quantitative parameters of the cotton are relatively large, the controller can increase the working power of the wrapping motor 21 (for example, by adjusting the speed and tension of the wrapping motor 21) so as to wrap the rapidly compressed, large-volume square cotton into a square bundle. The reverse is also true, which will not be elaborated here.

[0066] According to embodiments of this disclosure, the square-bundle cotton harvesting and baling machine enters the baling state when cotton enters the baling chamber. The quantification parameters include at least one parameter selected from feed rate or humidity. The hydraulic control system of the square-bundle cotton harvesting and baling machine also includes at least one device selected from a seed cotton flow sensor or a microwave humidity meter disposed in the square-bundle cotton harvesting and baling machine. The seed cotton flow sensor is used to detect the feed rate of cotton in the cotton collection box of the square-bundle cotton harvesting and baling machine, and the microwave humidity meter is used to detect the humidity of the cotton in the baling chamber. The controller is electrically connected to at least one device and is also used to control the output displacement of the first double pump 1 and the second double pump 4 according to at least one parameter received from at least one device when the square-bundle cotton harvesting and baling machine is in the baling state.

[0067] Specifically, the seed cotton flow sensor is installed at the inlet of the cotton collection box, with a measurement range of 0.1m. 3 / h~10m 3 The meter measures the amount of cotton fed into the cotton collection box of the square-bundle cotton baler. A microwave humidity meter, located at the outlet of the baling chamber, measures 5% to 30% humidity. It detects the humidity of the cotton bales and automatically adjusts the compression pressure when the humidity exceeds the standard to prevent mold growth.

[0068] According to embodiments of this disclosure, the hydraulic control system of the square-bundle cotton picking and baling machine further includes a first oil supply pipe and a first oil return pipe disposed in the square-bundle cotton picking and baling machine. The second output terminal Ps2 of the first double pump 1 is connected to the first oil supply pipe, which is connected to a plurality of first oil delivery pipes. The input terminal of the first double pump 1 is connected to the first oil return pipe, so that the first double pump 1 inputs pressurized oil to the first oil supply pipe and recovers pressurized oil from the first oil return pipe. A plurality of winding membrane circuits are connected in parallel between the first oil supply pipe and the first oil return pipe.

[0069] According to embodiments of this disclosure, the first return oil pipeline includes an overflow valve 3 and an electro-proportional switching valve 2. The overflow valve 3 is used to transfer pressurized oil from the first supply oil pipeline to the first return oil pipeline to unload the pressurized oil when the controller starts the first dual pump 1, or to transfer the abnormal pressurized oil to the first return oil pipeline to unload the pressurized oil in the event of abnormal oil pressure in the first supply oil pipeline with multiple broken diaphragm circuits. The electro-proportional switching valve 2 is used to control the flow rate of the unloaded pressurized oil based on its own opening degree under the control of the controller.

[0070] Figure 2 This is a partial perspective view of a square-bundle cotton baling machine according to an illustrative embodiment of the present disclosure.

[0071] According to embodiments of this disclosure, such as Figure 1 and Figure 2As shown, multiple first working components include a baffle cylinder 20, a wrapping motor 21, a film-cutting cylinder 22, and an auger motor 23. Multiple first oil delivery pipelines include oil delivery pipelines for the baffle cylinder, the wrapping motor, the film-cutting cylinder, and the auger motor. The wrapping / cutting valve assembly includes multiple solenoid directional valves, multiple throttle valves, and multiple hydraulically controlled check valves. Multiple solenoid directional valves include a baffle cylinder solenoid valve 18, a wrapping motor solenoid valve 16, a film-cutting cylinder solenoid valve 14, and an auger motor solenoid valve 12. Multiple throttle valves include a wrapping motor throttle valve 17 and an auger motor throttle valve 13. Multiple hydraulically controlled check valves include a baffle cylinder check valve 19 and a film-cutting cylinder check valve 15. Multiple wrapping / cutting circuits include a baffle cylinder circuit, a wrapping motor circuit, a film-cutting cylinder circuit, and an auger motor circuit. The baffle cylinder circuit includes a baffle cylinder 20, a baffle cylinder oil supply pipe, a baffle cylinder solenoid valve 18, and a baffle cylinder check valve 19. The baffle cylinder 20 is connected to a baffle located between the cotton collection box and the baling chamber to drive the baffle up or down, allowing cotton from the cotton collection box to enter the baling chamber or preventing cotton in the baling chamber from flowing back to the cotton collection box. The wrapping motor circuit includes a wrapping motor 21, a wrapping motor oil supply pipe, a wrapping motor solenoid valve 16, and a wrapping motor throttle valve 17. The wrapping motor 21 is connected to a rotating frame located at the outlet end of the baling chamber to drive the rotating frame to wrap the square cotton into square bales. The film-cutting cylinder circuit includes a film-cutting cylinder 22, a film-cutting cylinder oil supply pipe, a film-cutting cylinder solenoid valve 14, and a film-cutting cylinder check valve 15. The film-cutting cylinder 22 is connected to a cutting component located at the outlet end of the baling chamber to drive the cutting component to cut the film. The auger motor circuit includes an auger motor 23, an auger motor oil pipeline, an auger motor solenoid valve 12, and an auger motor throttle valve 13. The auger motor 23 is located in the cotton collection box to push the cotton in the cotton collection box into the baling chamber.

[0072] According to embodiments of this disclosure, the controller is also configured to perform at least one of the following operations: controlling the extension and retraction of the baffle cylinder 20 by controlling the opening degree of the baffle cylinder solenoid valve 18, and controlling the stable state of the baffle cylinder 20 under sudden pressure changes in the hydraulic control system by controlling the opening degree of the baffle cylinder check valve 19; controlling the starting state of the wrapping motor 21 by controlling the opening degree of the wrapping motor solenoid valve 16, and controlling the working power of the wrapping motor 21 by controlling the opening degree of the wrapping motor throttle valve 17; controlling the extension and retraction of the film-cutting cylinder 22 by controlling the opening degree of the film-cutting cylinder solenoid valve 14, and controlling the stable state of the film-cutting cylinder 22 under sudden pressure changes in the hydraulic control system by controlling the opening degree of the film-cutting cylinder check valve 15; controlling the starting state of the auger motor 23 by controlling the opening degree of the auger motor solenoid valve 12, and controlling the rotational speed of the auger motor 23 by controlling the opening degree of the auger motor throttle valve 13.

[0073] Figure 3This is an action control logic diagram of a hydraulic control system according to an illustrative embodiment of the present disclosure.

[0074] like Figure 3 As shown, from the second output terminal of the first dual pump 1 (such as...) Figure 1 The first double pump 1 shown in the figure enters the winding membrane valve group through the Ps2 port, the auger motor solenoid valve 12 is energized (valve core is in the right position), and the pressure oil enters the auger motor 23 through the auger motor throttle valve 13 (adjusting the flow rate into the auger motor 23) to push the cotton in the cotton collection box into the baling chamber.

[0075] Pressurized oil passes through the solenoid valve 14 of the diaphragm-breaking cylinder (when energized in the left position, the diaphragm-breaking cylinder 22 extends; when the valve core is in the middle position, the diaphragm-breaking cylinder 22 remains stationary; when the valve core is in the right position, the diaphragm-breaking cylinder 22 retracts). It then enters the rod-side and rodless-side chambers of the diaphragm-breaking cylinder 22 through the one-way valve 15 (which ensures the stability of the diaphragm-breaking cylinder 22 under sudden pressure changes in the hydraulic control system), controlling the extension and retraction of the diaphragm-breaking cylinder 22 to drive the cutting component to cut the film.

[0076] Pressurized oil enters the wrapping motor 21 through the wrapping motor solenoid valve 16 (valve core in the right position) and the wrapping motor throttle valve 17 (which regulates the flow rate into the wrapping motor 21), driving the rotating frame to wrap the square cotton into a square bundle. Furthermore, the rotational speed of the wrapping motor 21 can be controlled by adjusting the opening degree of the wrapping motor throttle valve 17.

[0077] Pressurized oil passes through the solenoid valve 18 of the baffle cylinder (when energized in the left position, the baffle cylinder 20 extends; when the valve core is in the middle position, the baffle cylinder 20 remains stationary; when the valve core is in the right position, the baffle cylinder 20 retracts), and through the one-way valve 19 of the baffle cylinder (the one-way valve 19 ensures the stability of the baffle cylinder 20 under sudden pressure changes in the hydraulic control system), respectively entering the rod chamber and rodless chamber of the baffle cylinder 20, controlling the extension and retraction of the baffle cylinder 20, thereby driving the baffle to rise or fall, so that cotton from the cotton collection box enters the baling chamber, or preventing cotton in the baling chamber from flowing back to the cotton collection box.

[0078] According to an embodiment of this disclosure, the controller is further configured to: control the flow rate of pressurized oil flowing through the auger motor circuit according to the quantitative parameters of the cotton, so as to control the rotation speed of the auger motor 23, thereby controlling the tilt angle of the push swashplate driven by the auger motor 23, so that the push swashplate can push the collected cotton to the baling chamber.

[0079] According to embodiments of this disclosure, the hydraulic control system of the square-bundle cotton picking and baling machine further includes a second oil supply pipe and a second oil return pipe disposed within the square-bundle cotton picking and baling machine. The second output terminal P2 of the second double pump 4 is connected to the second oil supply pipe, which is connected to a plurality of second oil delivery pipes. The input terminal of the second double pump 4 is connected to the second oil return pipe, so that the second double pump 4 inputs pressurized oil into the second oil supply pipe and recovers pressurized oil from the second oil return pipe. Multiple baling circuits are connected in parallel between the second oil supply pipe and the second oil return pipe.

[0080] In this implementation, the second double pump 4 works in conjunction with the first double pump 1. The second double pump 4 is connected to the packing valve assembly via multiple second oil delivery pipelines. The packing valve assembly, as the core hub, directionally delivers pressurized oil to the horizontal compression cylinder 24, the vertical compression cylinder 25, and the ejection cylinder 26, realizing the compression and packing ejection processes of the cotton. Simultaneously, the winding membrane valve assembly receives the second output from the first double pump 1 (e.g., ...). Figure 1 The pressurized oil output from the Ps2 port of the first dual pump 1 (shown in the diagram) systematically controls the wrapping motor 21 to wrap the baling film and the film-cutting cylinder 22 to cut the film. This, in conjunction with the auger motor 23 and the baffle cylinder 20, completes auxiliary operations, reducing pipeline redundancy and improving the compactness of the hydraulic control system. The hydraulic control system, through the wrapping and cutting valve group and the baling valve group, constitutes pressure regulation and flow control, ensuring that each working component operates collaboratively as needed, efficiently completing the entire cotton baling process.

[0081] According to an embodiment of this disclosure, the second oil supply line includes an electromagnetic relief valve 6 to set a safety pressure when the controller starts the second dual pump 4.

[0082] Furthermore, the electromagnetic relief valve 6 can transfer pressurized oil from the second oil supply pipeline to the second oil return pipeline to unload the pressurized oil when the controller starts the second double pump 4.

[0083] According to embodiments of this disclosure, the hydraulic control system of the square-bundle cotton picking and baling machine further includes a third oil supply pipeline disposed in the square-bundle cotton picking and baling machine. The first output terminal Ps1 of the first double pump 1 is connected to the third oil supply pipeline, and the third oil supply pipeline is connected to a plurality of second oil supply pipelines through a transition check valve 27, so that the first double pump 1 can auxiliaryly input pressurized oil into the plurality of second oil supply pipelines.

[0084] In this implementation, the first output terminal of the first duplex pump 1 (e.g. Figure 1The Ps1 port of the first dual pump 1 shown in the figure is connected to multiple second oil supply pipelines through the transition check valve 27 on the third oil supply pipeline to form a one-way pressure oil input channel, so that the first dual pump 1 can assist in inputting pressure oil to the horizontal compression cylinder 24, the vertical compression cylinder 25 and the ejection cylinder 26, provide stable power, and assist in controlling the action of the horizontal compression cylinder 24, the vertical compression cylinder 25 and the ejection cylinder 26.

[0085] According to an embodiment of this disclosure, the third oil supply pipeline includes an electromagnetic relief valve 28, which can transfer pressurized oil from the third oil supply pipeline to the first return oil pipeline to unload the pressurized oil when the controller starts the first dual pump 1.

[0086] According to embodiments of this disclosure, the hydraulic control system of the square-bundle cotton picking and baling machine further includes a fourth oil supply pipe disposed in the square-bundle cotton picking and baling machine. The first output terminal P1 of the second double pump 4 is connected to the fourth oil supply pipe. The fourth oil supply pipe includes an unloading valve 5, which is used to transfer pressurized oil from the fourth oil supply pipe to the second return oil pipe to unload the pressurized oil when the controller starts the second double pump 4, or to transfer the pressurized oil causing the abnormality to the second return oil pipe to unload the pressurized oil in the event of abnormal oil pressure in the second oil supply pipes of multiple baling circuits.

[0087] According to embodiments of this disclosure, a plurality of second working components include a lateral compression cylinder 24, a vertical compression cylinder 25, and an ejection cylinder 26. A plurality of second oil supply pipes include lateral cylinder oil supply pipes, vertical cylinder oil supply pipes, and ejection cylinder oil supply pipes. The baling valve assembly includes a plurality of hydraulically controlled directional valves. The plurality of hydraulically controlled directional valves include a lateral cylinder directional valve 11, a vertical cylinder directional valve 10, and an ejection cylinder directional valve 9. A plurality of baling cylinder circuits include a lateral compression cylinder circuit, a vertical compression cylinder circuit, and an ejection cylinder circuit. The lateral compression cylinder circuit includes a lateral compression cylinder 24, a lateral cylinder oil supply pipe, and a lateral cylinder directional valve 11. The lateral compression cylinder 24 is connected to a first pressure plate disposed in the baling chamber to drive the first pressure plate to laterally compress the cotton. The vertical compression cylinder circuit includes a vertical compression cylinder 25, a vertical cylinder oil supply pipe, and a vertical cylinder directional valve 10. The vertical compression cylinder 25 is connected to the second pressure plate located in the baling chamber to drive the second pressure plate to vertically compress the cotton. The ejection cylinder circuit includes an ejection cylinder 26, an ejection cylinder oil supply pipe, and an ejection cylinder reversing valve 9. The ejection cylinder 26 is located in the baling chamber to eject the square bales of cotton from the baling chamber.

[0088] In this implementation, the pressurized oil entering the baling valve assembly, on the one hand, enters the rod-side and rodless-side chambers of the push-out cylinder 26 through the push-out cylinder reversing valve 9 (when energized in the left position, the push-out cylinder 26 extends; when the valve core is in the middle position, the push-out cylinder 26 remains inactive; when the valve core is in the right position, the push-out cylinder 26 retracts), controlling the extension and retraction of the push-out cylinder 26 to push the square bundle of cotton out of the baling chamber. On the other hand, it enters the rod-side and rodless-side chambers of the vertical compression cylinder 25 through the vertical cylinder reversing valve 10 (when energized in the left position, the vertical compression cylinder 25 extends; when the valve core is in the middle position, the vertical compression cylinder 25 remains inactive; when the valve core is in the right position, the vertical compression cylinder 25 retracts), controlling the extension and retraction of the vertical compression cylinder 25 to drive the second pressure plate to vertically compress the cotton. On the other hand, the transverse cylinder reversing valve 11 (when energized in the left position, the transverse compression cylinder 24 extends; when the valve core is in the middle position, the transverse compression cylinder 24 remains stationary; when the valve core is in the right position, the transverse compression cylinder 24 retracts) enters the rod chamber and rodless chamber of the transverse compression cylinder 24 respectively, controlling the extension and retraction of the transverse compression cylinder 24, so as to drive the first pressure plate to compress the cotton transversely.

[0089] In addition, the hydraulic control system of the square baler may also include a last bale ejection cylinder 29. The last bale ejection cylinder 29 can be used to eject the last square bale of cotton from the baling chamber.

[0090] According to embodiments of this disclosure, the controller is also configured to perform at least one of the following operations: controlling the extension and retraction of the lateral compression cylinder 24 by controlling the opening degree of the lateral cylinder reversing valve 11; controlling the extension and retraction of the vertical compression cylinder 25 by controlling the opening degree of the vertical cylinder reversing valve 10; and controlling the extension and retraction of the ejection cylinder 26 by controlling the opening degree of the ejection cylinder reversing valve 9.

[0091] In some illustrative embodiments, the lateral compression of the cotton by the first pressure plate includes four stages: rapid extension, extension pressurization, extension secondary pressurization, and retraction.

[0092] When the transverse compression cylinder 24 extends rapidly, the solenoid relief valve 6 is energized to increase pressure, and the transverse cylinder reversing valve 11 is energized to reverse, with the valve core in the left position. The first output end of the second double pump 4 (e.g.) Figure 1 The second output terminal of the second duplex pump 4 (as shown in the diagram) is the P1 port of the second duplex pump 4. Figure 1 The pressure oil output from the P2 port of the second dual pump 4 shown in the figure passes through the second check valve 8 and the first check valve 7 respectively and then merges to supply the rodless chamber of the transverse compression cylinder 24, so that the transverse compression cylinder 24 extends quickly.

[0093] When the transverse compression cylinder 24 extends and applies pressure, the solenoid relief valve 6 is energized to increase the pressure, and the transverse cylinder reversing valve 11 is energized to reverse, with the valve core in the left position. As the pressure increases, medium-high pressure control oil is input to the unloading valve 5 to unload the first output terminal of the second double pump 4 (e.g., ...). Figure 1 The pressure of the second double pump 4 (P1 port) shown in the figure, the medium and high pressure control oil is supplied to the rodless chamber of the transverse compression cylinder 24, so that the transverse compression cylinder 24 extends and is pressurized.

[0094] When the transverse compression cylinder 24 extends and applies secondary pressure, the electromagnetic relief valve 28 is energized to increase pressure, and the electromagnetic relief valve 6 is de-energized, and the second output terminal of the second double pump 4 (such as...) Figure 1 The pressure at port P2 of the second tandem pump 4 (as shown in the diagram) is relieved, the transverse cylinder reversing valve 11 is energized and reversed, and the valve core is in the left position. The first output terminal of the first tandem pump 1 (as shown in the diagram) is... Figure 1 The first dual pump 1 shown in the diagram outputs pressurized oil from port Ps1 to the transition check valve 27 connected to port P3 (as shown in the diagram). Figure 1 The P3 port shown is connected to multiple second oil pipelines), and the pressure further increases, inputting high-pressure control oil to the unloading valve 5 to continuously unload the first output end of the second double pump 4 (as shown). Figure 1 The pressure of the second double pump 4 (P1 port) shown in the figure, the high pressure control oil is supplied to the rodless chamber of the transverse compression cylinder 24, and the transverse compression cylinder 24 extends to pressurize.

[0095] With the transverse compression cylinder 24 retracted, the solenoid relief valve 6 is energized to increase pressure, and the transverse cylinder reversing valve 11 is energized to reverse direction. In the right position of the valve core, the second output terminal of the second double pump 4 (e.g.) Figure 1 The pressure oil output from the P2 port of the second double pump 4 shown in the diagram is supplied to the rod chamber of the transverse compression cylinder 24 via the first check valve 7 and retracts. The unloading valve 5 unloads the first output end of the second double pump 4 (e.g., Figure 1 The pressure at port P1 of the second double pump 4 shown in the figure.

[0096] In some illustrative embodiments, the vertical compression of the cotton by the second pressure plate includes four stages: rapid extension, extension pressurization, extension secondary pressurization, and retraction.

[0097] When the vertical compression cylinder 25 extends rapidly, the solenoid relief valve 6 is energized to increase pressure, and the vertical cylinder reversing valve 10 is energized to reverse direction, with the valve core in the left position. The first output end of the second double pump 4 (e.g.) Figure 1 The second output terminal of the second duplex pump 4 (as shown in the diagram) is the P1 port of the second duplex pump 4. Figure 1 The pressure oil from the P2 port of the second dual pump 4 shown in the diagram flows through the second check valve 8 and the first check valve 7 respectively and then merges to supply the rodless chamber of the vertical compression cylinder 25, causing the vertical compression cylinder 25 to extend rapidly.

[0098] When the vertical compression cylinder 25 extends and applies pressure, the electromagnetic relief valve 6 is energized to increase the pressure, and the vertical cylinder reversing valve 10 is energized to reverse the direction. With the valve core in the left position, as the pressure increases, medium-high pressure control oil is input to the unloading valve 5 to unload the first output terminal of the second double pump 4 (e.g., ...). Figure 1 The pressure of the second double pump 4 (P1 port) shown in the figure, the medium and high pressure control oil is supplied to the rodless chamber of the vertical compression cylinder 25, so that the vertical compression cylinder 25 extends and is pressurized.

[0099] When the vertical compression cylinder 25 extends and applies secondary pressure, the electromagnetic relief valve 28 is energized to increase pressure, the electromagnetic relief valve 6 is de-energized, and the second output terminal of the second double pump 4 (such as...) Figure 1 The pressure at port P2 of the second double pump 4 (as shown) is relieved, the vertical cylinder reversing valve 10 is energized and reversed, the valve core is in the left position, and the first output end of the first double pump 1 (as shown) Figure 1 The first tandem pump 1 (Ps1 port) outputs pressure oil to the transition check valve 27 connected to port P3, further increasing the pressure. High-pressure control oil is then input to the unloading valve 5 to continuously unload the first output terminal of the second tandem pump 4 (e.g., ...). Figure 1 The pressure of the second double pump 4 (P1 port) shown in the figure, the high pressure control oil is supplied to the rodless chamber of the vertical compression cylinder 25, so that the vertical compression cylinder 25 extends and is pressurized.

[0100] When the vertical compression cylinder 25 retracts, the solenoid relief valve 6 is energized to increase pressure, and the vertical cylinder reversing valve 10 is energized to reverse direction. With the valve core in the right position, the second output terminal of the second double pump 4 (e.g.) Figure 1 The pressurized oil output from the P2 port of the second double pump 4 shown in the diagram is supplied to the rod chamber of the vertical compression cylinder 25 via the first check valve 7 and retracts. The unloading valve 5 unloads the first output end of the second double pump 4 (e.g., ...). Figure 1 The pressure at port P1 of the second double pump 4 shown in the figure.

[0101] With the hydraulic cylinder 26 extended, the solenoid relief valve 6 is energized and pressurized, and the hydraulic cylinder reversing valve 9 is energized and reversed, with the valve core in the left position. The first output terminal of the second double pump 4 (e.g.) Figure 1 The second output terminal of the second duplex pump 4 (as shown in the diagram) is the P1 port of the second duplex pump 4. Figure 1 The pressure oil output from the P2 port of the second double pump 4 shown in the figure passes through the second check valve 8 and the first check valve 7 respectively and then flows together to supply the rodless chamber of the ejection cylinder 26, so that the ejection cylinder 26 extends.

[0102] When the hydraulic cylinder 26 retracts, the solenoid relief valve 6 is energized and pressurized, the hydraulic cylinder reversing valve 9 is energized and reversed, and the valve core is in the right position, the second output end of the second double pump 4 (e.g.) Figure 1The pressure oil output from the P2 port of the second double pump 4 shown in the diagram is supplied to the rod chamber of the push-out cylinder 26 via the first check valve 7 to retract, and the unloading valve 5 unloads the first output end of the second double pump 4 (e.g., port P2). Figure 1 The pressure at port P1 of the second double pump 4 shown in the figure.

[0103] In the event of failure of the first tandem pump 1, the pressure of the solenoid relief valve 6 can be adjusted, and the unloading valve 5 can be unloaded, using the second output terminal of the second tandem pump 4 (e.g., Figure 1 The second double pump 4 shown in the figure outputs high pressure (P2 port) to realize the backup compression function of the horizontal compression cylinder 24 and the vertical compression cylinder 25.

[0104] In some illustrative embodiments, high-precision pressure sensors (measuring range 0~31.5MPa, accuracy ±0.1%FS) are installed in the oil delivery pipes of the rodless chamber of the horizontal compression cylinder 24 and the rodless chamber of the vertical compression cylinder 25, respectively, to collect the actual pressure value during the cotton compression process in real time. Simultaneously, at the first output end of the first double pump 1 (e.g., ... Figure 1 The Ps1 port of the first duplex pump 1 shown), and the first output terminal of the second duplex pump 4 (as shown) Figure 1 The second output terminal of the second duplex pump 4 (as shown in the diagram) is the P1 port of the second duplex pump 4. Figure 1 A pressure sensor is installed at port P2 of the second duplex pump 4 shown in the diagram to monitor the output pressure of the first duplex pump 1 and the second duplex pump 4, providing pump-end data support for closed-loop regulation of the compression force.

[0105] The controller can be a programmable logic controller (PLC) with analog input and output modules, such as an SM1231 analog input module and an SM1232 analog output module. The controller receives 4-20mA analog signals from the pressure sensor, executes a PID control algorithm, and outputs control signals to the solenoid directional valves, solenoid relief valves, and electro-hydraulic proportional valves in the hydraulic control system.

[0106] The electromagnetic directional valve is equipped with a feedback interface, which allows the controller to obtain the valve core position signal in real time, ensuring the precise movement of the working parts and avoiding pressure fluctuations caused by valve assembly jamming.

[0107] By combining the three-stage compression process of "rapid extension - extension pressurization - secondary pressurization", a graded closed-loop control logic is constructed to ensure precise and controllable compression force.

[0108] Specifically, the target pressure is first set. The controller has preset target pressure values ​​for different compression stages (based on the cotton bale density requirements, the target pressure value for the rapid extension stage is 5MPa~8MPa, the target pressure value for the extension and pressurization stage is 15MPa~20MPa, and the target pressure value for the secondary pressurization stage is 25MPa~30MPa), and supports manual fine-tuning through the human-machine interface (HMI).

[0109] Next, signal acquisition and processing are performed. The pressure sensor collects the pressure signals from the rodless chamber of the horizontal compression cylinder 24 and the rodless chamber of the vertical compression cylinder 25 in real time, converts them into 4mA~20mA analog signals, and transmits them to the controller. The controller filters the pressure signals (removing instantaneous pressure fluctuations caused by oil circuit impact) and calculates the pressure deviation between the actual pressure and the target pressure.

[0110] The control system incorporates a PID control algorithm, which automatically outputs control signals based on the pressure deviation value.

[0111] When the actual pressure is lower than the target pressure, the controller increases the current output (0-24V DC) of the solenoid relief valve 6 and solenoid relief valve 28 to increase the oil supply pressure. At the same time, it controls the valve core opening of the vertical cylinder reversing valve 10 and the horizontal cylinder reversing valve 11 (through pulse width modulation PWM signal) to increase the oil flow and accelerate the pressure rise.

[0112] When the actual pressure exceeds the target pressure, the controller reduces the current output of the solenoid relief valve 6 and solenoid relief valve 28, triggering the unloading valve 5 to partially unload and reduce the oil supply pressure. At the same time, it finely adjusts the valve core positions of the vertical cylinder reversing valve 10 and the horizontal cylinder reversing valve 11 to reduce the oil inlet flow and avoid pressure overshoot.

[0113] When the actual pressure equals the target pressure, the controller maintains the current control signal and locks the cylinder position through the baffle cylinder check valve 19 and the diaphragm cylinder check valve 15. In conjunction with the pressure-holding characteristics of the vertical cylinder reversing valve 10 and the horizontal cylinder reversing valve 11 (0-type intermediate position valve group), the controller ensures stable compression force (pressure fluctuation ≤ ±0.5MPa).

[0114] During the rapid extension phase, prioritizing flow rate, the closed-loop control focuses on quickly reaching the target lower pressure limit (5MPa). The PLC controls the dual pumps to combine and supply oil, the solenoid directional valve is fully open, and the pressure sensor only performs real-time monitoring without initiating the adjustment.

[0115] During the extension and secondary pressurization stages, the system switches to pressure priority mode, increases the PID adjustment frequency to 100Hz, and corrects the pump output pressure and valve flow rate in real time through high-frequency feedback from the pressure sensor to ensure that the cotton bale is subjected to uniform force during compression and that the density deviation is controlled within ±2%.

[0116] Therefore, on the one hand, the PLC can adaptively adjust the working conditions, automatically adjusting the pressure and speed according to real-time quantitative parameters such as cotton feeding amount and humidity, adapting to the operational needs of different quality seed cotton and small plots of land. On the other hand, the staged pressure control makes the hydraulic control system highly efficient and energy-saving, reducing heat generation. Through closed-loop control logic, the compression force fluctuation is controlled from ±0.5MPa to ±0.2MPa, and the density uniformity deviation of the cotton bale is no more than ±2%, solving the problem of density deviation exceeding ±5% in existing technologies.

[0117] In the event of abnormal pressure sensor feedback signal (e.g., signal loss, pressure sudden change exceeding 10MPa / s), the controller automatically triggers redundancy protection.

[0118] Specifically, immediately disconnect the power supply to the solenoid relief valve 6 and / or the solenoid relief valve 28, and activate the unloading valve 5 to fully unload, preventing overload of multiple packing cylinders. Control the vertical compression cylinder 25 and the horizontal compression cylinder 24 to slowly retract via the vertical cylinder reversing valve 10 and the horizontal cylinder reversing valve 11, respectively, while displaying a fault alarm on the HMI (marking the fault location of the pressure sensor) for quick troubleshooting.

[0119] In some illustrative embodiments, the controller can link the electro-hydraulic proportional valve and the solenoid directional valve to automate the entire packaging process.

[0120] Specifically, an electro-hydraulic proportional relief valve and an electro-hydraulic proportional flow valve can be connected in series in the packaging valve assembly to precisely regulate the system pressure and the operating speed of the working components, respectively.

[0121] In some illustrative embodiments, magnetostrictive displacement sensors can be installed on the cylinders of the lateral compression cylinder 24, the vertical compression cylinder 25, and the ejection cylinder 26, respectively. The magnetostrictive displacement sensors can provide real-time feedback on the stroke positions of the lateral compression cylinder 24, the vertical compression cylinder 25, and the ejection cylinder 26.

[0122] In this implementation, the PLC's digital input module (receives switching signals from the magnetostrictive displacement sensor and the seed cotton flow sensor) and analog output module (outputs 0~10V control signals to the electro-hydraulic proportional valve (e.g., the electro-hydraulic proportional relief valve and the electro-hydraulic proportional flow valve)) achieve multi-sensor signal fusion and multi-working-component collaborative control.

[0123] Figure 4 This is a sequential logic diagram of a hydraulic control system according to an illustrative embodiment of the present disclosure.

[0124] like Figure 4 As shown, the sequential logic of the hydraulic control system consists of the following steps S10 to S30.

[0125] Step S10: The controller receives the signals from the sensors, analyzes and judges them, and adaptively makes the corresponding output.

[0126] Step S20: Based on the baling feedback, the horizontal compression cylinder 24 and the vertical compression cylinder 25 in the baling chamber should be in a certain stage of compression. The controller adjusts whether the electromagnetic overflow valve 28 and the electromagnetic overflow valve 6 are energized, thereby controlling the execution of the rapid extension stage, the extension pressurization stage and the secondary pressurization stage to ensure the density of the cotton bale.

[0127] Step S30: After packaging is completed, based on the stroke feedback of the horizontal compression cylinder 24 and the vertical compression cylinder 25 (execution cylinder), the controller outputs signals to the push-out cylinder 26 and the wrapping motor 21 to perform wrapping and push out the square bundle of cotton, thus completing the entire packaging process.

[0128] Based on this, a fully automated control system can be built for the entire process of "feeding-compression-wrapping-breaking-ejection". Each step is precisely coordinated by the PLC linking the electro-hydraulic proportional valve and the solenoid directional valve.

[0129] Specifically, the first phase: cotton feeding testing and preparation.

[0130] When the seed cotton flow sensor detects that the seed cotton in the cotton collection box has reached a preset threshold (e.g., 70% of the cotton collection box volume), it sends a start signal to the PLC.

[0131] The PLC outputs control signals: the auger motor solenoid valve 12 is energized (valve core in the right position), and the auger motor throttle valve 13 adjusts its opening according to the feedback from the seed cotton flow sensor, controlling the speed of the auger motor 23 (the larger the feed, the faster the speed, to avoid material blockage). At the same time, the baffle cylinder solenoid valve 18 is energized (valve core in the left position), and the baffle cylinder 20 extends to close the inlet of the compression chamber, preparing for compression.

[0132] Phase Two: Phased Compression Automation.

[0133] The PLC automatically matches the preset compression pressure curve based on the feed amount fed by the seed cotton flow sensor.

[0134] Rapid extension phase: The PLC-controlled solenoid relief valve 6 is energized to increase pressure (target pressure is 5MPa), the horizontal cylinder reversing valve 11 / vertical cylinder reversing valve 10 is energized (valve core in the left position), the first double pump 1 and the second double pump 4 combine to supply oil, and the horizontal compression cylinder 24 / vertical compression cylinder 25 rapidly extends. The electro-hydraulic proportional flow valve is fully open to prioritize the speed of action.

[0135] During the extension pressurization / secondary pressurization stage: Pressure sensors provide real-time pressure feedback. The PLC adjusts the output pressure of the electro-hydraulic proportional relief valve via PID control, which in turn affects the valve opening of the solenoid directional valves (lateral cylinder directional valve 11 and vertical cylinder directional valve 10). When the feed rate is large, the secondary pressurization target pressure is automatically increased (up to 30 MPa). When the microwave humidity meter detects excessively high humidity in the cotton bale (greater than 20%), the pressurization pressure is automatically reduced (15 MPa~18 MPa) to prevent cotton bale clumping. When the magnetostrictive displacement sensor indicates that the cylinder has reached the preset stroke (e.g., the lateral compression cylinder 24 extends to 90% of its maximum stroke), the PLC automatically switches to the next compression stage without manual operation.

[0136] Phase 3: Automated film wrapping and cutting.

[0137] After the horizontal compression cylinder 24 / vertical compression cylinder 25 completes the secondary pressurization, the magnetostrictive displacement sensor sends a "compression complete" signal to the PLC.

[0138] After a 0.5s delay, the PLC outputs the following signal: the solenoid valve 16 of the wrapping motor is energized (the valve core is in the right position), and the throttle valve 17 of the wrapping motor automatically adjusts the speed of the wrapping motor 21 according to the size of the cotton bale (the larger the cotton bale, the slower the speed, and the number of wrapping layers is controlled between 8 and 12 layers).

[0139] Once the film wrapping is complete (the PLC calculates the film wrapping length by integrating the rotational speed of the film wrapping motor 21, and after reaching the preset value), the film cutting cylinder solenoid valve 14 is energized (the valve core is in the left position), and the film cutting cylinder 22 extends to cut the film material. At the same time, the film cutting cylinder check valve 15 locks the position of the film cutting cylinder 22 to prevent the film material from loosening.

[0140] Phase 4: Automatic ejection and reset.

[0141] After the membrane is cut, the PLC immediately controls the reversing valve 9 of the ejection cylinder to be energized (the valve core is in the left position), and the electro-hydraulic proportional flow valve adjusts the extension speed of the ejection cylinder 26 (0.1 m / s~0.3 m / s) to smoothly eject the cotton bale.

[0142] After the push-out cylinder 26 reaches its maximum stroke, the magnetostrictive displacement sensor sends a "push-out complete" signal. The PLC controls the push-out cylinder reversing valve 9 to de-energize (valve core in the right position), and the push-out cylinder 26 retracts. At the same time, the control baffle cylinder 20 retracts, the cotton collection box inlet opens, and the next packaging cycle begins.

[0143] In this implementation, the entire process from cotton feeding to bundling is automated, reducing labor costs and increasing baling efficiency by 30%, meeting the needs of industrial applications. The PLC coordinates the film wrapping, compression, and ejection circuits via bus communication (Profinet), avoiding conflicting actions (e.g., prohibiting film wrapping during compression and prohibiting compression during ejection). Simultaneously, the PLC features emergency interlock protection. When any sensor reports an abnormality (e.g., pressure overshoot, cylinder jamming, zero flow), the PLC immediately triggers the interlock, activating unloading valve 5 for full unloading, de-energizing and resetting all solenoid directional valves, and displaying the fault type and location on the HMI, while simultaneously sounding an alarm, eliminating the need for manual fault diagnosis. By recording the operating data of each sensor and working component through the PLC, historical curves can be traced through the HMI in case of a fault, reducing troubleshooting time by 50%.

[0144] Figure 5 This is a flowchart of a control method for a hydraulic control system applied to a square-bundle cotton baling machine according to an illustrative embodiment of the present disclosure.

[0145] According to another embodiment of this disclosure, a control method for the hydraulic control system of the aforementioned square-bundle cotton baling machine is also provided, such as... Figure 5 As shown, the control method includes the following steps S1 to S2.

[0146] Step S1: Detect the quantitative parameters of the cotton.

[0147] Step S2: Based on the quantitative parameters of cotton, control the output displacement of the first double pump 1 and the second double pump 4 to the pressure oil, and control the opening degree of the winding membrane valve group and the packing valve group, so as to control the pressure oil flow through multiple winding membrane circuits and multiple packing circuits respectively, thereby controlling the working power of multiple first working parts and multiple second working parts respectively.

[0148] In this implementation, using the first double pump 1 and the second double pump 4 as power sources reduces the size of the hydraulic system of the square cotton baler, meeting the design principles of lightweight and compactness in small-plot areas. The controller, based on the cotton's quantitative parameters, controls the output displacement of the pressurized oil by the first double pump 1 and the second double pump 4, and also controls the opening degree of the wrapping film valve group and the baling valve group. This allows for separate control of the pressurized oil flow through multiple wrapping film circuits and multiple baling circuits, thereby controlling the working power of each of the multiple first working components and multiple second working components. In this way, real-time monitoring and adjustment of the different energy consumption of each working component can be achieved, reducing energy consumption and meeting the operational needs of efficient cotton harvesting in small-plot areas.

[0149] Those skilled in the art will understand that the features described in the various embodiments and / or claims of this disclosure can be combined or combined in various ways, even if such combinations or combinations are not explicitly described in this disclosure. In particular, the features described in the various embodiments and / or claims of this disclosure can be combined and / or combined in various ways without departing from the spirit and teachings of this disclosure. All such combinations and / or combinations fall within the scope of this disclosure.

[0150] It should also be noted that the directional terms mentioned in the embodiments, such as "up," "down," "front," "back," "left," and "right," are only for reference to the directions in the accompanying drawings and are not intended to limit the scope of protection of this disclosure. Throughout the drawings, the same elements are represented by the same or similar reference numerals. Conventional structures or constructions will be omitted where they may cause confusion in understanding this disclosure, and the shapes and dimensions of the components in the drawings do not reflect actual size and proportion, but are only schematic representations of the embodiments of this disclosure.

[0151] Unless otherwise stated, the numerical parameters in this specification and the appended claims are approximate values ​​and can be varied according to desired characteristics derived from the content of this disclosure. Specifically, all figures used in the specification and claims to indicate composition, reaction conditions, etc., should be understood to be modified by the term "about" in all cases. Generally, this means that a specific amount may vary by ±10% in some embodiments, ±5% in some embodiments, ±1% in some embodiments, and ±0.5% in some embodiments.

[0152] The use of ordinal numbers such as "first," "second," "third," etc., in the specification and claims to modify the corresponding elements does not imply that the element has any ordinal number, nor does it represent the order of one element with another element, or the order of manufacturing methods. The use of these ordinal numbers is only to enable a named element to be clearly distinguished from another element with the same name.

[0153] Furthermore, unless specifically described or required to occur in a specific order, the order of the above steps is not limited to those listed above and can be varied or rearranged according to the desired design. Moreover, the above embodiments can be used in combination with each other or with other embodiments based on design and reliability considerations; that is, technical features from different embodiments can be freely combined to form more embodiments.

[0154] The embodiments of this disclosure have been described above. However, these embodiments are for illustrative purposes only and are not intended to limit the scope of this disclosure. Although various embodiments have been described above, this does not mean that the measures in the various embodiments cannot be used advantageously in combination. The scope of this disclosure is defined by the appended claims and their equivalents. Various substitutions and modifications can be made by those skilled in the art without departing from the scope of this disclosure, and all such substitutions and modifications should fall within the scope of this disclosure.

Claims

1. A hydraulic control system for a square-bundle cotton baling machine, characterized in that, Including those mounted on the square-bundle cotton baling machine: The first and second tandem pumps are used to output pressurized oil with different displacements. Multiple tangled membrane circuits, each of the tangled membrane circuits includes a first oil delivery pipeline connected to the first dual pump, a first working component connected to the first oil delivery pipeline, and a tangled membrane valve assembly disposed in the first oil delivery pipeline; Multiple packing loops, each of which includes a second oil pipeline connected to the second dual pump, a second working component connected to the second oil pipeline, and a packing valve group disposed on the second oil pipeline. The multiple first working components and the multiple second working components, driven by the pressure oil output from the first dual pump and the pressure oil output from the second dual pump respectively, pack the collected cotton into square bundles according to the packing process. The controller is electrically connected to the first dual pump, the second dual pump, the winding-off membrane valve group, and the packing valve group. It is used to control the output displacement of the first dual pump and the second dual pump to the pressure oil according to the quantitative parameters of the cotton, and to control the opening degree of the winding-off membrane valve group and the packing valve group, so as to control the flow rate of the pressure oil flowing through the plurality of winding-off membrane circuits and the plurality of packing circuits respectively, thereby controlling the working power of the plurality of first working components and the plurality of second working components respectively.

2. The hydraulic control system of the square-bundle cotton baling machine according to claim 1, characterized in that, The multiple baling circuits include multiple baling cylinders, which are used to compress the cotton in the baling chamber into a square shape when the collected cotton is conveyed to the baling chamber of the square cotton picking and baling machine; the wrapping circuit includes a wrapping motor, which is used to wrap the square cotton into the square cotton bale using film material. The controller is also used for: Based on the compression speed of the multiple packing cylinders and the quantitative parameters, the flow rate of the pressure oil flowing through the wrapping film circuit is controlled to control the working power of the wrapping motor, so as to wrap the square cotton of different sizes compressed by the multiple packing cylinders at different speeds into the square bundle of cotton.

3. The hydraulic control system of the square-bundle cotton baling machine according to claim 2, characterized in that, When the cotton enters the baling chamber, the square baler enters the baling state; The quantitative parameters include at least one of the feeding amount or humidity; the hydraulic control system of the square baler also includes at least one of the seed cotton flow sensor or microwave humidity meter installed in the square baler; the seed cotton flow sensor is used to detect the feeding amount of the cotton in the cotton collection box of the square baler, and the microwave humidity meter is used to detect the humidity of the cotton in the baling chamber. The controller is electrically connected to the at least one device and is also used to control the output displacement of the first dual pump and the second dual pump according to the at least one parameter received from the at least one device when the square cotton baler is in the baling state.

4. The hydraulic control system of the square-bundle cotton baling machine according to claim 3, characterized in that, The plurality of first working components include a baffle cylinder, the film-wrapping motor, the film-cutting cylinder, and the auger motor; the plurality of first oil delivery pipelines include a baffle cylinder oil delivery pipeline, a film-wrapping motor oil delivery pipeline, a film-cutting cylinder oil delivery pipeline, and an auger motor oil delivery pipeline; the film-wrapping and film-cutting valve assembly includes a plurality of solenoid directional valves, a plurality of throttle valves, and a plurality of hydraulically controlled check valves; the plurality of solenoid directional valves include a baffle cylinder solenoid valve, a film-wrapping motor solenoid valve, a film-cutting cylinder solenoid valve, and an auger motor solenoid valve; the plurality of throttle valves include a film-wrapping motor throttle valve and an auger motor throttle valve; the plurality of hydraulically controlled check valves include a baffle cylinder check valve and a film-cutting cylinder check valve; The plurality of entangled membrane circuits include: The baffle cylinder circuit includes the baffle cylinder, the baffle cylinder oil supply pipe, the baffle cylinder solenoid valve, and the baffle cylinder check valve. The baffle cylinder is connected to a baffle disposed between the cotton collection box and the baling chamber to drive the baffle to rise or fall, so that cotton from the cotton collection box enters the baling chamber or prevents cotton in the baling chamber from flowing back to the cotton collection box. The wrapping motor circuit includes the wrapping motor, the wrapping motor oil supply pipe, the wrapping motor solenoid valve, and the wrapping motor throttle valve. The wrapping motor is connected to a rotating frame located at the outlet end of the baling chamber to drive the rotating frame to wrap the film material around the square cotton into the square baled cotton. The film-cutting cylinder circuit includes the film-cutting cylinder, the film-cutting cylinder oil supply pipe, the film-cutting cylinder solenoid valve, and the film-cutting cylinder check valve. The film-cutting cylinder is connected to a cutting component located at the outlet end of the compression chamber to drive the cutting component to cut the film material. The auger motor circuit includes the auger motor, the auger motor oil pipeline, the auger motor solenoid valve, and the auger motor throttle valve. The auger motor is located in the cotton collection box to push the cotton in the cotton collection box into the baling chamber.

5. The hydraulic control system of the square-bundle cotton baling machine according to claim 4, characterized in that, The controller is also used to perform at least one of the following operations: By controlling the opening degree of the solenoid valve of the baffle cylinder, the extension and retraction of the baffle cylinder can be controlled. By controlling the opening degree of the one-way valve of the baffle cylinder, the stable state of the baffle cylinder under the sudden pressure change of the hydraulic control system can be controlled. The starting state of the wrapping motor is controlled by controlling the opening degree of the solenoid valve of the wrapping motor, and the working power of the wrapping motor is controlled by controlling the opening degree of the throttle valve of the wrapping motor. By controlling the opening degree of the solenoid valve of the diaphragm-breaking cylinder, the extension and retraction of the diaphragm-breaking cylinder can be controlled. By controlling the opening degree of the one-way valve of the diaphragm-breaking cylinder, the stable state of the diaphragm-breaking cylinder under the sudden pressure change of the hydraulic control system can be controlled. The starting state of the auger motor is controlled by controlling the opening degree of the solenoid valve of the auger motor, and the rotational speed of the auger motor is controlled by controlling the opening degree of the throttle valve of the auger motor.

6. The hydraulic control system of the square-bundle cotton baling machine according to claim 5, characterized in that, The controller is also used for: Based on the quantitative parameters of the cotton, the flow rate of the pressurized oil flowing through the auger motor circuit is controlled to control the rotation speed of the auger motor, thereby controlling the tilt angle of the pusher swashplate driven by the auger motor, so that the pusher swashplate can push the collected cotton to the baling chamber.

7. The hydraulic control system of the square-bundle cotton baling machine according to claim 2, characterized in that, The plurality of second working components include a horizontal compression cylinder, a vertical compression cylinder, and an ejection cylinder; the plurality of second oil delivery pipes include a horizontal cylinder oil delivery pipe, a vertical cylinder oil delivery pipe, and an ejection cylinder oil delivery pipe; the packaging valve group includes a plurality of hydraulically controlled directional valves; the plurality of hydraulically controlled directional valves include a horizontal cylinder directional valve, a vertical cylinder directional valve, and an ejection cylinder directional valve; The plurality of packaging hydraulic cylinder circuits include: The transverse compression cylinder circuit includes the transverse compression cylinder, the transverse cylinder oil supply pipe and the transverse cylinder reversing valve. The transverse compression cylinder is connected to a first pressure plate disposed in the baling chamber to drive the first pressure plate to compress the cotton transversely. The vertical compression cylinder circuit includes the vertical compression cylinder, the vertical cylinder oil supply pipe, and the vertical cylinder reversing valve. The vertical compression cylinder is connected to a second pressure plate disposed in the baling chamber to drive the second pressure plate to vertically compress the cotton. The ejection cylinder circuit includes the ejection cylinder, the ejection cylinder oil supply pipe, and the ejection cylinder reversing valve. The ejection cylinder is located in the baling chamber to eject the square baled cotton from the baling chamber.

8. The hydraulic control system of the square-bundle cotton baling machine according to claim 7, characterized in that, The controller is also used to perform at least one of the following operations: The extension and retraction of the transverse compression cylinder is controlled by controlling the opening degree of the transverse cylinder reversing valve; The vertical compression cylinder can be extended or retracted by controlling the opening degree of the vertical cylinder reversing valve; The extension and retraction of the ejection cylinder is controlled by adjusting the opening degree of the reversing valve of the ejection cylinder.

9. The hydraulic control system of the square-bundle cotton baling machine according to claim 1, characterized in that, It also includes a first oil supply pipe and a first oil return pipe disposed in the square cotton picking and baling machine; the second output end of the first dual pump is connected to the first oil supply pipe, and the first oil supply pipe is connected to the plurality of first oil conveying pipes; the input end of the first dual pump is connected to the first oil return pipe so that the first dual pump inputs the pressurized oil into the first oil supply pipe and recovers the pressurized oil from the first oil return pipe. The plurality of entangled membrane circuits are connected in parallel between the first oil supply pipeline and the first oil return pipeline.

10. The hydraulic control system of the square-bundle cotton baling machine according to claim 9, characterized in that, The first return oil pipeline includes an overflow valve and an electro-proportional switching valve; the overflow valve is used to transfer pressurized oil from the first supply oil pipeline to the first return oil pipeline to unload the pressurized oil when the controller starts the first dual pump, or to transfer the pressurized oil causing the abnormality to the first return oil pipeline to unload the pressurized oil when the oil pressure of the first supply oil pipeline of the multiple broken membrane circuits is abnormal. The electro-proportional switching valve is used to control the flow rate of the unloaded pressure oil based on its own degree of opening under the control of the controller.

11. The hydraulic control system of the square-bundle cotton baling machine according to claim 9, characterized in that, It also includes a second oil supply pipe and a second oil return pipe installed in the square cotton baling machine; the second output end of the second double pump is connected to the second oil supply pipe, and the second oil supply pipe is connected to the plurality of second oil delivery pipes; the input end of the second double pump is connected to the second oil return pipe, so that the second double pump inputs the pressurized oil into the second oil supply pipe and recovers the pressurized oil from the second oil return pipe; The multiple packaging circuits are connected in parallel between the second oil supply pipeline and the second oil return pipeline.

12. The hydraulic control system of the square-bundle cotton baling machine according to claim 11, characterized in that, The second oil supply line includes an electromagnetic relief valve to set a safety pressure when the controller starts the second dual pump.

13. The hydraulic control system of the square-bundle cotton baling machine according to claim 9, characterized in that, It also includes a third oil supply pipeline installed in the square cotton baling machine; the first output end of the first dual pump is connected to the third oil supply pipeline, and the third oil supply pipeline is connected to the plurality of second oil supply pipelines through a transition check valve, so that the first dual pump can assist in inputting the pressurized oil into the plurality of second oil supply pipelines.

14. The hydraulic control system of the square-bundle cotton baling machine according to claim 11, characterized in that, It also includes a fourth oil supply pipe installed in the square cotton baling machine; the first output end of the second double pump is connected to the fourth oil supply pipe, and the fourth oil supply pipe includes an unloading valve; the unloading valve is used to transfer the pressure oil from the fourth oil supply pipe to the second return oil pipe to unload the pressure oil when the controller starts the second double pump, or to transfer the pressure oil causing the abnormality to the second return oil pipe to unload the pressure oil when the oil pressure of the second oil supply pipe of the multiple baling circuits is abnormal.

15. A control method for a hydraulic control system applied to a square-bundle cotton baler as described in any one of claims 1 to 14, characterized in that, include: Quantitative parameters of cotton are measured; Based on the quantitative parameters of the cotton, the output displacement of the first and second double pumps to the pressure oil is controlled, and the opening degree of the winding membrane valve group and the baling valve group is controlled, so as to control the pressure oil flow through multiple winding membrane circuits and multiple baling circuits respectively, thereby controlling the working power of multiple first working parts and multiple second working parts respectively.

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