Hydraulically-controlled waste film picking machine

Abstract

The invention discloses a hydraulic control waste film picking machine, and belongs to the technical field of farmland residual film picking. Comprising a traction assembly used for connecting the waste film picking machine with power equipment, a residual film conveying assembly used for picking and conveying residual films on the ground, a winding roller assembly used for winding the residual films conveyed by the residual film conveying assembly into rolls, and a film collecting assembly used for collecting the residual films scattered in the film winding process and corn root stubbles. The traction assembly comprises a rack connected with the whole machine, a first-stage hydraulic system and a second-stage hydraulic system; the winding roller assembly and the film collecting assembly move, and automatic actions during film unloading and film collecting are controlled. The invention provides an economical, efficient and practical residual film picking machine tool, the farmland pollution control level is improved, and the cultivated land quality is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of agricultural waste film collection technology, and in particular to a hydraulically controlled waste film collection machine. Background Technology

[0002] While the extensive use of agricultural mulch film has brought benefits such as increased production and income, the "white pollution" problem caused by its failure to be recycled in a timely and comprehensive manner is seriously threatening agricultural production and the natural ecological environment. At present, most agricultural mulch films in China are made of polyethylene material with a thickness of more than 0.01 mm. This material is fragile, degrades extremely slowly, and is not easy to be picked up by machinery after use. This is the main reason for the current low rate of residual film collection and recycling.

[0003] Existing residual film picking equipment often fails to achieve ideal results in actual operation, and generally suffers from problems such as complex structure, inconvenient operation, incomplete picking, and difficulty in separating film, soil, and root stubble. Summary of the Invention

[0004] The purpose of this invention is to provide an economical, efficient, and practical residual film collection device to improve the level of farmland pollution control and ensure the quality of arable land.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a hydraulically controlled waste film picking machine, comprising a traction assembly for connecting the waste film picking machine to a power device, a waste film conveying assembly for picking up and conveying ground waste film, a roll assembly for winding the waste film conveyed by the waste film conveying assembly into a roll, a film collecting assembly for collecting the waste film scattered during the film winding process, a primary hydraulic system and a secondary hydraulic system, wherein the traction assembly includes a frame connected to the whole machine;

[0006] The primary hydraulic system is powered by the tractor's hydraulic system and is used to control the tilting of the roller assembly and the lifting of the entire machine;

[0007] The secondary hydraulic system is powered by the tractor's rear output shaft to drive the movement of the residual film conveying assembly, the roller assembly, and the film collection assembly, and to control the automated actions during film unloading.

[0008] As a further description of the above technical solution: the traction assembly also includes a traction frame for connecting the tractor and a depth-limiting wheel for assisting in setting the working depth.

[0009] As a further description of the above technical solution: the primary hydraulic system includes a roller assembly tilting cylinder and a traveling wheel cylinder. The roller assembly tilting cylinder is connected to the tractor hydraulic output interface through a fourth oil inlet pipe and a fourth oil return pipe, and is used to drive the roller assembly to tilt.

[0010] The travel wheel cylinder is connected to the tractor's hydraulic output interface via the fifth inlet pipe and the fifth return pipe, and is also connected to the travel wheel to adjust the overall working height of the machine.

[0011] As a further description of the above technical solution: the secondary hydraulic system includes a gearbox, an oil pump, a three-dimensional four-way solenoid valve, a diaphragm assembly limit switch and its diaphragm limit switch power supply, a rack retraction cylinder limit switch and its rack retraction cylinder limit switch power supply, and a rack retraction cylinder;

[0012] The oil pump draws oil from the oil tank through the sixth return oil pipe and delivers high-pressure oil through the outlet oil pipe;

[0013] The toothed retraction cylinder is used to drive the toothed rod on the roll assembly to retract during film unloading.

[0014] As a further description of the above technical solution: the residual film conveying assembly includes a film conveying chain rake, a soil shaking wheel, a film conveying motor and a film conveying chain. The film conveying motor is driven by the oil pump through the first oil inlet pipe, and the hydraulic oil after work is returned to the three-dimensional four-way solenoid valve through the first oil return pipe.

[0015] The film delivery chain is driven by the film delivery motor through the film delivery drive sprocket, which in turn drives the film delivery chain rake to move;

[0016] The soil-shaking wheel is driven by a soil-shaking chain to rotate, and is used to shake off the soil attached to the residual film.

[0017] As a further description of the above technical solution: the roller assembly includes a roller frame, a rack assembly drive motor, and a rack assembly;

[0018] The rack and pinion assembly drive motor is driven by the secondary hydraulic system via the second inlet oil pipe, and the return oil is supplied via the second return oil pipe;

[0019] The rack assembly is driven to rotate by a rack assembly drive motor via belt drive, and is used to wind the residual film.

[0020] As a further description of the above technical solution: the rack assembly includes a rack, a guide plate, a connecting plate, a tension spring, and a base;

[0021] When the rack retraction cylinder is activated, it drives the connecting plate, causing the rack to retract inward.

[0022] As a further description of the above technical solution: the membrane collection assembly includes a side plate, a membrane collection chain rake, a support wheel, a membrane collection chain drive, and a membrane collection motor;

[0023] The diaphragm motor is driven by the three-dimensional four-way solenoid valve through the third oil inlet pipe, and the return oil is through the third oil return pipe.

[0024] The film collection chain drive transmits the power of the film collection motor to the film collection drive shaft to drive the film collection chain rake.

[0025] As a further description of the above technical solution: when the roller assembly flips to unload the film, the roller frame separates from the limit switch of the film collection assembly, generates an electrical signal that is transmitted to the power supply of the film collection limit switch, and triggers the three-dimensional four-way solenoid valve to reverse, causing the hydraulic oil supplied to the film collection motor to flow in the opposite direction, driving the film collection chain rake to reverse to unload the film.

[0026] As a further description of the above technical solution: when the roll assembly flips upward to the predetermined position, the roll frame touches the limit switch of the rack retraction cylinder, generating an electrical signal that is transmitted to the power supply of the rack retraction cylinder limit switch, which in turn triggers the three-dimensional four-way solenoid valve to connect the oil supply pipe to the rack retraction cylinder. High-pressure oil enters the cylinder through the rotary joint, causing it to contract and driving the rack to contract in order to unload the film roll.

[0027] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0028] 1. It can perform multiple complex movements such as film rolling, film unloading, film collection, lifting of implements, and automatic adjustment of the hydraulic motor rotation direction. These functions are all centrally controlled through the hydraulic system, and the driver can complete all operations on the tractor, which greatly simplifies the work process and improves work efficiency.

[0029] 2. During film unloading, the roller assembly will automatically rotate by operating the hydraulic handle of the tractor. During the rotation, the limit switch and the three-dimensional four-way solenoid valve are linked to automatically trigger the film collection device to reverse and the film winding toothed rod to retract, thereby automatically unloading the collected and wound residual film. The whole process is smooth and requires no manual intervention.

[0030] 3. The use of hydraulic transmission instead of complex mechanical transmission mechanisms makes the structure of the entire machine simpler and more compact. This not only reduces manufacturing costs and maintenance difficulty, but also improves the stability and reliability of the equipment and reduces downtime caused by mechanical failures. Attached Figure Description

[0031] Figure 1 A left front axonometric view of the present invention is shown;

[0032] Figure 2 A right rear isometric view of the present invention is shown;

[0033] Figure 3 This shows a left front axonometric view of the present invention in the uncoated state;

[0034] Figure 4 This shows a right rear axonometric view of the present invention in the uncoated state;

[0035] Figure 5 A schematic diagram of the roller assembly structure of the present invention is shown;

[0036] Figure 6 A schematic diagram of the membrane assembly structure of the present invention is shown;

[0037] Figure 7 A schematic diagram of the gearbox and oil pump in the two-stage hydraulic system of the present invention is shown;

[0038] Figure 8 A schematic diagram of a three-dimensional four-way valve in the two-stage liquid pressure system of the present invention is shown;

[0039] Figure 9 A schematic diagram of the hydraulic control of the present invention is shown.

[0040] Legend:

[0041] 1. Traction assembly; 1-1. Traction frame; 1-2. Frame; 1-3. Depth-limiting wheel;

[0042] 2. Residual film conveying assembly; 2-1. Film conveying chain rake; 2-2. Soil-shaking wheel; 2-3. Soil-shaking sprocket; 2-4. Film conveying drive sprocket; 2-5. Film conveying motor; 2-6. Film conveying chain; 2-7. Soil-shaking chain;

[0043] 3. Roller assembly; 3-1. Roller frame; 3-2. Gear assembly drive motor; 3-3. Belt drive; 3-4. Gear assembly; 3-4-1. Gear; 3-4-2. Guide plate; 3-4-3. Connecting plate; 3-4-4. Tension spring; 3-4-5. Base; 3-5. Rotary joint;

[0044] 4. Membrane collection assembly; 4-1. Side plate; 4-2. Membrane collection chain rake; 4-3. Membrane collection drive shaft; 4-4. Support wheel; 4-5. Membrane collection chain drive; 4-6. Membrane collection motor;

[0045] 5. Primary hydraulic system; 5-1. Roller assembly tilting cylinder; 5-2. Traveling wheel cylinder; 5-2-1. Traveling wheel;

[0046] 6. Two-stage hydraulic system; 6-1. Gearbox; 6-2. Oil pump; 6-2-1. Oil inlet pipe; 6-2-2. Oil outlet pipe; 6-2-3. Diaphragm assembly limit switch; 6-2-4. Diaphragm limit switch power supply; 6-3. Gear rack retraction cylinder; 6-3-1. Gear rack retraction cylinder limit switch; 6-3-2. Gear rack retraction cylinder limit switch power supply; 6-4. Three-dimensional four-way solenoid valve; 6-5. Oil tank;

[0047] Y1, First oil inlet pipe; Y1-1, First oil return pipe; Y2, Second oil inlet pipe; Y2-2, Second oil return pipe; Y3, Third oil inlet pipe; Y3-3, Third oil return pipe; Y4, Oil delivery pipe; Y5, Fourth oil inlet pipe; Y5-5, Fourth oil return pipe; Y6, Fifth oil inlet pipe; Y6-6, Fifth oil return pipe; H1, Sixth oil return pipe. Detailed Implementation

[0048] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0049] Please see Figures 1-9 The present invention provides a technical solution: a hydraulically controlled waste film picking machine, comprising a traction assembly 1, a residual film conveying assembly 2, a roller assembly 3, a film collecting assembly 4, a primary hydraulic system 5, and a secondary hydraulic system 6.

[0050] The waste film collection machine is connected to a tractor via a traction assembly 1 for operation. The traction assembly 1 includes a traction frame 1-1 for connecting the tractor and depth-limiting wheels 1-3 for assisting in setting the working depth. Before the operation begins, the hydraulic system needs to be connected. The entire hydraulic system is divided into a primary hydraulic system 5, which is powered directly by the tractor, and a secondary hydraulic system 6, which is powered by the tractor's rear output shaft.

[0051] The primary hydraulic system 5 is powered by the tractor's own hydraulic system. When connected, the fourth oil inlet pipe Y5 and the fourth oil return pipe Y5-5 of the roller assembly tilting cylinder 5-1 that controls the tilting of the roller assembly 3, and the fifth oil inlet pipe Y6 and the fifth oil return pipe Y6-6 of the traveling wheel cylinder 5-2 that controls the lifting and lowering of the implement, are respectively connected to the tractor's hydraulic output interface.

[0052] The power source of the secondary hydraulic system 6 is independent of the tractor hydraulic system. First, the gearbox 6-1 and oil pump 6-2 are pre-fixed at the rear of the tractor. The rear output shaft of the tractor is connected to the gearbox 6-1 through a coupling. The gearbox 6-1 then drives the oil pump 6-2 to work. The oil pump 6-2 draws oil from the oil tank 6-5 through the sixth return oil pipe H1, and then delivers the high-pressure oil to the system through the oil outlet pipe 6-2-2. The oil pump 6-2, the rack retraction cylinder 6-3 (one-way), the three-dimensional four-way solenoid valve 6-4, and the oil tank 6-5 are connected through oil pipes to form a complete secondary hydraulic circuit.

[0053] Among them, the three-dimensional four-way solenoid valve 6-4 is equipped with multiple oil ports and two signal connectors (D1: power supply corresponding to X1 on the three-dimensional four-way valve, D2: power supply corresponding to X2 on the three-dimensional four-way valve), which are used to control the corresponding actions of the two limit switches (X1: limit switch 6-2-3 of the diaphragm assembly, X2: limit switch 6-3-1 of the rack retraction cylinder).

[0054] Specifically, the core components of the system's automated control include a three-dimensional four-way solenoid valve 6-4, and two sets of limit switch groups: one set is the limit switch 6-2-3 for sensing the initial action of unloading the film and the limit switch power supply 6-2-4 for sensing the initial action of unloading the film; the other set is the limit switch 6-3-1 for sensing the action of the retracting cylinder of the rack and the limit switch power supply 6-3-2 for sensing the action of the retracting cylinder of the rack.

[0055] At the start of the operation, the driver first controls the oil circuit in the first-level hydraulic system 5 connected to the travel wheel cylinder 5-2 by operating the hydraulic handle of the tractor. The hydraulic oil drives the two travel wheel cylinders 5-2 on the left and right sides (connected in parallel through the oil circuit), which drives the travel wheel 5-2-1 to rise and fall. Together with the depth limiting wheel 1-3, they adjust the height of the entire frame 1-2 off the ground until the most suitable height for picking up residual film is reached.

[0056] After the machine height is adjusted, the driver engages the power output shaft of the tractor. The power is transmitted to the oil pump 6-2 via the gearbox 6-1. The oil pump 6-2 starts to operate and generates high-pressure oil. The secondary hydraulic system 6 starts to work and drives the following assemblies to move in coordination.

[0057] When the residual film conveying assembly 2 moves, high-pressure oil flows from the oil pump 6-2 into the film conveying motor 2-5 through the first oil inlet pipe Y1, driving it to rotate. The film conveying motor 2-5 drives the film conveying drive sprocket 2-4 through the film conveying chain 2-6, which in turn drives the film conveying chain rake 2-1 to move. At the same time, the soil shaking chain 2-7 drives the soil shaking sprocket 2-3, causing the soil shaking wheel 2-2 to rotate. The residual film, stubble, and other debris on the ground are picked up by the film conveying chain rake 2-1 and conveyed to the rear and upper part of the machine. During the conveying process, the soil shaking wheel 2-2 and the soil shaking chain 2-7 can shake off the soil attached to the residual film. The hydraulic oil that has completed the work flows through the first return oil pipe Y1-1 and the three-dimensional four-way solenoid valve 6-4 back to the oil tank 6-5.

[0058] When the rack assembly 3-4 rotates, another high-pressure oil from the oil pump 6-2 is supplied to the rack assembly drive motor 3-2 via the second oil inlet pipe Y2. The drive motor 3-2 drives the rack assembly 3-4 to rotate via the belt drive 3-3. The rack assembly 3-4 is composed of rack 3-4-1, guide plate 3-4-2, connecting plate 3-4-3, tension spring 3-4-4, and base 3-4-5. The rotating rack 3-4-1 winds up the residual film conveyed from the residual film conveying assembly 2 to form a film roll. The hydraulic oil returns to the three-dimensional four-way solenoid valve 6-4 via the second return oil pipe Y2-2.

[0059] When the film collection assembly 4 is in film collection motion, a hydraulic oil branched off from the three-dimensional four-way solenoid valve 6-4 enters the film collection motor 4-6 through the third oil inlet pipe Y3. The film collection assembly 4 is composed of components such as side plate 4-1, film collection chain rake 4-2, film collection drive shaft 4-3, and support wheel 4-4. The film collection motor 4-6 drives the film collection drive shaft 4-3 through the film collection chain transmission 4-5, which in turn drives the film collection chain rake 4-2 to move, collecting the residual film that is scattered or not completely rolled up during the film winding process into the inside of the film collection assembly 4. The hydraulic oil returns to the three-dimensional four-way solenoid valve 6-4 through the third oil return pipe Y3-3.

[0060] When the operation has been running for a certain period of time, and the residual film roll on the roller assembly 3 is large or the residual film in the film collection assembly 4 is large, it is necessary to unload the film. The unloading process is highly automated through the cooperation of the primary hydraulic system 5 and the secondary hydraulic system 6.

[0061] The driver operates the tractor's hydraulic handle to control the primary hydraulic system 5, causing hydraulic oil to enter the roller assembly tilting cylinder 5-1 through the fourth inlet pipe Y5. The roller assembly tilting cylinder 5-1 actuates, pushing the entire roller assembly 3 upwards. (See attached diagram.) Figure 1 To be continued Figure 4 As the roller assembly 3 begins to rotate, the roller frame 3-1 on it separates from the film collection assembly limit switch 6-2-3(X1) mounted on the frame.

[0062] This separation action generates an electrical signal, which is transmitted to the film collection travel switch power supply 6-2-4(D1) and triggers the three-dimensional four-way solenoid valve 6-4. The solenoid valve reverses, causing the hydraulic oil supplied to the film collection motor 4-6 to flow in the opposite direction. The film collection motor 4-6 then reverses, driving the film collection chain rake 4-2 to move in the opposite direction, automatically unloading the residual film collected inside the film collection assembly 4 onto the ground.

[0063] As the roller assembly 3 continues to rotate upward, when the roller assembly 3 rotates upward to 90°, another part of the roller frame 3-1 will touch the limit switch 6-3-1 (X2) of the rack retraction cylinder.

[0064] This touch action generates another electrical signal, which is transmitted to the limit switch power supply 6-3-2 (D2) of the rack retraction cylinder, triggering the three-dimensional four-way solenoid valve 6-4 again. The three-dimensional four-way solenoid valve 6-4 connects the oil supply pipe Y4 to the rack retraction cylinder 6-3. High-pressure oil enters the rack retraction cylinder 6-3 (one-way) through the rotary joint 3-5, causing it to retract. The retraction of the rack retraction cylinder 6-3 (one-way) drives the internal mechanism of the film rack assembly 3-4 (such as the connecting plate 3-4-3), causing the extended rack 3-4-1 to retract inward. At this time, the rack assembly 3-4 itself is still rotating. Due to the retraction of the rack 3-4-1, the huge film roll wrapped around it loses its support and automatically falls off under the combined action of gravity and centrifugal force, falling to the ground.

[0065] After the film unloading is completed, the driver reverses the tractor's hydraulic handle to retract the roller assembly tilting cylinder 5-1. The roller assembly 3 begins to fall back to its original working position. During the fall, the limit switch 6-3-1 of the rack retraction cylinder and the limit switch 6-2-3 of the film collection assembly are triggered again in sequence. The three-dimensional four-way solenoid valve 6-4 automatically resets under the control of the electrical signal, and each oil circuit returns to normal working state. At the same time, the hydraulic oil in the rack retraction cylinder 6-3 is unloaded, and the tension spring 3-4-4 pulls the retracted rack 3-4-1 back to the extended working state. Thus, a complete film unloading process ends, and the machine can continue to carry out the next round of film picking.

[0066] This device can meet the needs of collecting and recycling residual film after planting various crops such as zucchini, sunflower, pepper and corn, and has a wide range of applications.

[0067] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A hydraulically controlled waste film pickup machine, characterized in that, The machine includes a traction assembly (1) for connecting the waste film pickup machine to a power unit, a waste film conveying assembly (2) for picking up and conveying waste film on the ground, a roll assembly (3) for winding the waste film conveyed by the waste film conveying assembly (2) into a roll, a film collection assembly (4) for collecting the waste film scattered during the film winding process, a primary hydraulic system (5) and a secondary hydraulic system (6). The traction assembly (1) includes a frame (1-2) connected to the whole machine. The primary hydraulic system (5) is powered by the tractor hydraulic system and is used to control the rotation of the roller assembly (3) and the lifting of the whole machine; The secondary hydraulic system (6) is powered by the tractor's rear output shaft to drive the residual film conveying assembly (2), the roller assembly (3) and the film collection assembly (4) to move, and to control the automated actions during film unloading.

2. The hydraulically controlled waste film pickup machine according to claim 1, characterized in that: The traction assembly (1) also includes a traction frame (1-1) for connecting the tractor and a depth-limiting wheel (1-3) for assisting in setting the working depth.

3. The hydraulically controlled waste film pickup machine according to claim 1, characterized in that: The first-level hydraulic system (5) includes a roller assembly tilting cylinder (5-1) and a traveling wheel cylinder (5-2). The roller assembly tilting cylinder (5-1) is connected to the tractor hydraulic output interface through the fourth oil inlet pipe (Y5) and the fourth oil return pipe (Y5-5) to drive the roller assembly (3) to tilt. The travel wheel cylinder (5-2) is connected to the tractor's hydraulic output interface through the fifth oil inlet pipe (Y6) and the fifth oil return pipe (Y6-6), and is connected to the travel wheel (5-2-1) to adjust the overall working height of the machine.

4. The hydraulically controlled waste film pickup machine according to claim 1, characterized in that: The secondary hydraulic system (6) includes a gearbox (6-1), an oil pump (6-2), a three-dimensional four-way solenoid valve (6-4), a diaphragm assembly limit switch (6-2-3) and its diaphragm limit switch power supply (6-2-4), a rack retraction cylinder limit switch (6-3-1) and its rack retraction cylinder limit switch power supply (6-3-2), and a rack retraction cylinder (6-3); The oil pump (6-2) draws oil from the oil tank (6-5) through the sixth return oil pipe (H1) and delivers high-pressure oil through the oil outlet pipe (6-2-2); The toothed retraction cylinder (6-3) is used to drive the toothed rod on the roll assembly (3) to retract during film unloading.

5. A hydraulically controlled waste film pickup machine according to claim 4, characterized in that: The residual film conveying assembly (2) includes a film conveying chain rake (2-1), a soil shaking wheel (2-2), a film conveying motor (2-5), and a film conveying chain (2-6). The film conveying motor (2-5) is driven by the oil pump (6-2) through the first oil inlet pipe (Y1). The hydraulic oil after work is returned to the three-dimensional four-way solenoid valve (6-4) through the first oil return pipe (Y1-1). The film delivery chain (2-6) is driven by the film delivery motor (2-5) through the film delivery drive sprocket (2-4), which in turn drives the film delivery chain rake (2-1) to move; The soil-shaking wheel (2-2) is driven by the soil-shaking chain (2-7) to rotate the soil-shaking sprocket (2-3) and is used to shake off the soil attached to the residual film.

6. A hydraulically controlled waste film pickup machine according to claim 1, characterized in that: The roller assembly (3) includes a roller frame (3-1), a rack assembly drive motor (3-2), and a rack assembly (3-4); The rack assembly drive motor (3-2) is driven by the secondary hydraulic system (6) through the second inlet pipe (Y2), and the return oil is through the second return pipe (Y2-2); The rack assembly (3-4) is driven to rotate by the rack assembly drive motor (3-2) via belt drive (3-3) for winding the residual film.

7. A hydraulically controlled waste film pickup machine according to claims 4 and 6, characterized in that: The rack assembly (3-4) includes a rack (3-4-1), a guide plate (3-4-2), a connecting plate (3-4-3), a tension spring (3-4-4), and a base (3-4-5); When the rack retraction cylinder (6-3) is activated, it drives the connecting plate (3-4-3), causing the rack (3-4-1) to retract inward.

8. A hydraulically controlled waste film pickup machine according to claim 4, characterized in that: The membrane collection assembly (4) includes a side plate (4-1), a membrane collection chain rake (4-2), a support wheel (4-4), a membrane collection chain drive (4-5), and a membrane collection motor (4-6); The diaphragm motor (4-6) is driven by the three-dimensional four-way solenoid valve (6-4) through the third oil inlet pipe (Y3), and the return oil is through the third oil return pipe (Y3-3); The film collection chain drive (4-5) transmits the power of the film collection motor (4-6) to the film collection drive shaft (4-3) to drive the film collection chain rake (4-2) to move.

9. A hydraulically controlled waste film pickup machine according to claims 4 and 8, characterized in that: When the roller assembly (3) flips over to unload the film, the roller frame (3-1) separates from the film collection assembly limit switch (6-2-3), generating an electrical signal that is transmitted to the film collection limit switch power supply (6-2-4) and triggers the three-dimensional four-way solenoid valve (6-4) to switch, causing the hydraulic oil supplied to the film collection motor (4-6) to flow in the reverse direction, driving the film collection chain rake (4-2) to reverse and unload the film.

10. A hydraulically controlled waste film pickup machine according to claims 4 and 7, characterized in that: When the roll assembly (3) flips upward to the predetermined position, the roll frame (3-1) touches the limit switch (6-3-1) of the rack retraction cylinder, generating an electrical signal that is transmitted to the power supply (6-3-2) of the rack retraction cylinder limit switch, triggering the three-dimensional four-way solenoid valve (6-4) to connect the oil supply pipe (Y4) to the rack retraction cylinder (6-3). High-pressure oil enters the cylinder through the rotary joint (3-5) to cause it to retract, driving the rack (3-4-1) to retract and unload the film roll.

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