Pruning tools used during the watermelon vine extension stage
By designing a pruning tool with alcohol spraying and drug coating functions, the problems of virus spread and wound exposure during the watermelon vine extension period were solved, achieving safe pruning and healthy growth of watermelon plants.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- NINGBO ACAD OF AGRI SCI
- Filing Date
- 2024-10-31
- Publication Date
- 2026-05-26
AI Technical Summary
During the pruning process of watermelon vines, existing techniques can easily lead to the spread of viruses from a single plant to all plants, or expose large areas of wounds, posing a possibility of virus spread.
A pruning tool was designed, comprising pruning pliers, an alcohol canister, a gel-like medicine tube, and a multi-functional scissor head. By pulling the lever, a wedge-shaped pusher and a sliding seat are activated to cut the vines while simultaneously spraying alcohol for disinfection and applying a gel-like medicine to prevent the spread of viruses and wound infection.
This method allows for disinfection and sterilization while pruning vines, preventing cross-infection of viruses and protecting the healthy growth of plants.
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Figure CN119138225B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of pruning tools, specifically pruning tools for watermelon vines during their extension stage. Background Technology
[0002] Watermelon is one of the most popular fruits in summer. However, watermelon production also presents many challenges. For example, during the pruning stage of the vine's growth, viruses and fungi on some plants can easily spread to most watermelon plants, causing widespread infection and death. During watermelon growth, many branches often develop, but in watermelon production, most of these branches need to be removed—a process called pruning—leaving only one main vine and one or two lateral vines. This concentrates the watermelon's vegetative growth, preparing it for later fruit setting.
[0003] However, during watermelon pruning, farmers typically use their fingernails to pinch off branches or break or tear them off. Pinching with fingernails or sharp objects can easily spread viruses from a single plant to all plants. While breaking branches avoids direct contact and spreads the virus, it exposes a large wound, still posing a possibility of virus transmission from a single plant. Therefore, this paper provides a pruning tool for watermelon vines during their elongation stage to address these issues. Summary of the Invention
[0004] To address the shortcomings of existing technologies, this invention provides a pruning tool for watermelon vines during their elongation stage. This solves the problem that using fingernails or sharp tools to pinch off branches can easily spread viruses from a single plant to all plants. While breaking off branches avoids spreading viruses from a single plant to all plants through contact, it exposes large wound areas, which also presents the possibility of viruses spreading from a single plant.
[0005] To achieve the above objectives, the present invention is implemented through the following technical solution: a pruning tool for watermelon vines during the vine extension stage, including pruning pliers, wherein an alcohol tank and a gel-like medicine tube are respectively installed on the upper and lower sides of the pruning pliers, a pull-type drive component is provided inside the pruning pliers, and a multi-functional scissor head is installed at the front end of the pruning pliers;
[0006] The multi-functional pruning shear head includes a sliding seat, a blade, a wedge-shaped pusher, a traction cable, an alcohol sprayer, and a drug extruder. The sliding seat is slidably disposed on both sides of the front end of the pruning shear head, the wedge-shaped pusher is slidably disposed on the back of the sliding seat, the blade is fixedly installed on the outside of the sliding seat, the alcohol sprayer is installed on both sides of the blade, the drug extruder is installed inside the blade, and the traction cable is fixedly connected to the end of the wedge-shaped pusher.
[0007] The pull-type drive component includes a pull rod, a return spring, and two sets of piston-type material suction devices. The pull rod is movably inserted into the inside of the pruning pliers, and the return spring is movably sleeved on the outer surface of the pull rod. The pull rod is fixedly installed with the traction cable, and the piston-type material suction devices are drivenly connected to the pull rod. The alcohol tank is connected to the alcohol sprayer through a set of piston-type material suction devices, and the gel-like drug tube is connected to the drug extruder through a set of piston-type material suction devices.
[0008] Preferably, the end of the pull rod passes through the pruning shears, a sliding stop is fixedly installed on the outer surface of the pull rod, the end of the return spring abuts against the sliding stop, a sliding connecting frame is fixedly connected to the front end of the pull rod, the sliding connecting frame is movably sleeved on the front outer surface of the piston-type material suction device, and the traction steel cable is fixedly connected to the sliding connecting frame.
[0009] Preferably, the piston-type material suction device includes a piston cylinder, a piston rod, a fixing member, a conveying hose, and a one-way valve. The fixing member is fixedly installed inside the pruning pliers. One end of the piston cylinder is fixedly connected to the fixing member. The piston rod is movably inserted into the other end of the piston cylinder. The one-way valve is fixedly installed between the piston cylinder and the conveying hose.
[0010] Preferably, the sliding connecting frame is movably sleeved on the outer surface of the piston cylinder, the end of the piston rod is fixedly connected to the sliding stop, and one-way valves are installed between the two sets of piston cylinders and the alcohol tank and the gel drug tube, respectively.
[0011] Preferably, a T-shaped shaft is movably inserted into the interior of the sliding seat, a memory spring is movably sleeved on the outer surface of the T-shaped shaft, and the memory spring is placed inside the sliding seat. The end of the T-shaped shaft is fixedly connected to the inner wall of the pruning clamp, and a groove is provided at the bottom of the wedge-shaped push block, through which the T-shaped shaft passes.
[0012] Preferably, the alcohol sprayer includes a spray head, a connecting pipe, and a feed pipe. The spray head is arranged in two rows, and the two rows of spray heads are located on both sides of the blade. The two rows of spray heads are fixedly installed on the outer wall of the sliding seat. The connecting pipe is fixedly installed inside the sliding seat. The spray head is connected to the connecting pipe. The feed pipe is fixedly installed at the bottom end of the connecting pipe.
[0013] Preferably, the drug extruder includes a high-pressure drug storage chamber disposed between two sets of connecting pipes, a drug outlet hole is provided at the bottom of the blade, a control valve is installed between the high-pressure drug storage chamber and the drug outlet hole, and the connecting pipes and the high-pressure drug storage chamber are respectively connected to two sets of conveying hoses.
[0014] Preferably, a sliding block is movably inserted into the end of the sliding seat, a support cylinder is fixedly installed inside the sliding seat, a lifting spring is installed at the bottom of the support cylinder, the bottom end of the sliding block is movably inserted into the inside of the support cylinder, a roller is rotatably connected between the two sets of sliding blocks, and the roller is slidably connected inside the valve handle of the control valve.
[0015] This invention discloses a pruning tool for watermelon vines during their elongation stage, which has the following beneficial effects:
[0016] 1. This pruning tool, used during the watermelon vine-growing stage, works by pulling a lever, which, via a traction cable, moves two sets of wedge-shaped pushers backward. The wedge-shaped pushers press the sliding seat towards the center, compressing the memory spring and causing the sliding seat to move outward from inside the pruning clamp. At this point, the two sets of blades are stacked in a staggered manner, cutting the vine. Workers then collect the cut vines. Simultaneously, the sliding blocks on both sides abut against each other, moving the sliding blocks into the support cylinder and compressing the lifting spring. The sliding blocks, via rollers, rotate the valve handle on the outer surface of the control valve, opening it. This allows for the application of a gel-like drug to the vine roots through the discharge hole while cutting the vine. The drug, combined with a sterilizing agent, provides a sterilization effect, and simultaneously wraps the cut wound, preventing cross-infection.
[0017] 2. This pruning tool, used during the watermelon vine extension stage, involves releasing the pull rod. Under the action of the return spring, the piston rod moves inward into the piston cylinder, allowing the conveying hose to deliver the material to the feed pipe and the high-pressure storage chamber. Simultaneously, the memory spring pushes the two sets of sliding seats to move to their original positions on both sides. At this point, the blades are removed from the vines. At the same time, the lifting spring pushes the sliding block outward, causing the roller to return to its original position and close the control valve. Then, the spray head sprays alcohol to disinfect the blades during the return process, while the gel-like medicine enters the high-pressure storage chamber, replenishing the high-pressure storage chamber and maintaining a high-pressure state, ready for the next pruning cycle when applying the medicine. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 This is a schematic diagram of the overall outer surface structure of the present invention;
[0020] Figure 2 This is a schematic diagram of the overall rear structure of the present invention;
[0021] Figure 3This is a schematic diagram of the internal structure of the pruning clamp of the present invention;
[0022] Figure 4 This is a schematic diagram of the outer surface structure of the piston-type material suction device of the present invention;
[0023] Figure 5 This is a cross-sectional view of the internal structure of the front end of the pruning clamp of the present invention;
[0024] Figure 6 This is a schematic diagram of the internal structure of the multifunctional scissor head of the present invention;
[0025] Figure 7 This is a schematic diagram of the bottom structure of the multifunctional scissor head of the present invention;
[0026] Figure 8 This is a cross-sectional view of the internal structure of the drug extruder of the present invention.
[0027] In the diagram: 1. Pruning pliers; 2. Alcohol tank; 3. Gel-like drug tube; 4. Pull-type drive component; 41. Pull rod; 42. Return spring; 43. Sliding stop; 44. Sliding connecting frame; 45. Piston-type material suction device; 451. Piston cylinder; 452. Piston rod; 453. Fixing component; 454. Material conveying hose; 455. One-way valve; 5. Multi-functional scissor head; 51. Sliding seat; 52. Blade; 53. Wedge-shaped push block; 54. Traction cable; 55. T-shaft; 56. Memory spring; 57. Alcohol sprayer; 571. Spray head; 572. Connecting pipe; 573. Feed pipe; 58. Drug extruder; 581. High-pressure drug storage chamber; 582. Drug outlet; 583. Control valve; 584. Roller; 585. Support cylinder; 586. Sliding block; 587. Lifting spring; 59. Slide groove. Detailed Implementation
[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are described clearly and completely. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0029] This application provides a pruning tool for watermelon vines during their elongation stage, which solves the problem that using fingernails or sharp tools to pinch off branches can easily spread the virus from a single plant to all plants. While breaking off branches avoids spreading the virus from a single plant to all plants through contact, it exposes a large area of wound, which also poses the possibility of the virus spreading from a single plant.
[0030] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.
[0031] This invention discloses a pruning tool for watermelon vines during their vine-spreading stage.
[0032] According to the appendix Figure 1-8 As shown, it includes pruning pliers 1, with an alcohol container 2 and a gel-like medicine tube 3 installed on the upper and lower sides of the pruning pliers 1 respectively. The pruning pliers 1 is equipped with a pull-type drive component 4 inside, and a multi-functional scissor head 5 is installed at the front end of the pruning pliers 1.
[0033] The multi-functional scissor head 5 includes a sliding seat 51, a blade 52, a wedge-shaped pusher 53, a traction cable 54, an alcohol sprayer 57, and a drug extruder 58. The sliding seat 51 is slidably disposed on both sides of the front end of the pruning shears 1. The wedge-shaped pusher 53 is slidably disposed on the back of the sliding seat 51. The blade 52 is fixedly installed on the outside of the sliding seat 51. The alcohol sprayer 57 is installed on both sides of the blade 52. The drug extruder 58 is installed inside the blade 52. The traction cable 54 is fixedly connected to the end of the wedge-shaped pusher 53.
[0034] The pull-type drive component 4 includes a pull rod 41, a return spring 42, and two sets of piston-type material suction devices 45. The pull rod 41 is movably inserted into the inside of the pruning pliers 1, and the return spring 42 is movably sleeved on the outer surface of the pull rod 41. The pull rod 41 is fixedly installed with the traction cable 54. The piston-type material suction devices 45 are connected to the pull rod 41 through a transmission connection. The alcohol tank 2 is connected to the alcohol sprayer 57 through a set of piston-type material suction devices 45, and the gel-like drug tube 3 is connected to the drug extruder 58 through a set of piston-type material suction devices 45.
[0035] The end of the pull rod 41 passes through the pruning shears 1. A sliding stop 43 is fixedly installed on the outer surface of the pull rod 41. The end of the return spring 42 abuts against the sliding stop 43. A sliding connecting frame 44 is fixedly connected to the front end of the pull rod 41. The sliding connecting frame 44 is movably sleeved on the outer surface of the front end of the piston-type material suction device 45. The traction steel cable 54 is fixedly connected to the sliding connecting frame 44.
[0036] The piston-type material suction device 45 includes a piston cylinder 451, a piston rod 452, a fixing member 453, a conveying hose 454, and a one-way valve 455. The fixing member 453 is fixedly installed inside the pruning clamp 1. One end of the piston cylinder 451 is fixedly connected to the fixing member 453. The piston rod 452 is movably inserted into the other end of the piston cylinder 451. The one-way valve 455 is fixedly installed between the piston cylinder 451 and the conveying hose 454.
[0037] The sliding connecting bracket 44 is movably sleeved on the outer surface of the piston cylinder 451, the end of the piston rod 452 is fixedly connected to the sliding stop 43, and one-way valves 455 are installed between the two sets of piston cylinders 451 and the alcohol tank 2 and the gel drug tube 3 respectively.
[0038] A T-shaped shaft 55 is movably inserted into the sliding seat 51. A memory spring 56 is movably sleeved on the outer surface of the T-shaped shaft 55 and is placed inside the sliding seat 51. The end of the T-shaped shaft 55 is fixedly connected to the inner wall of the pruning clamp 1. A groove 59 is provided at the bottom of the wedge-shaped push block 53, and the T-shaped shaft 55 passes through the groove 59.
[0039] The alcohol sprayer 57 includes a spray head 571, a connecting pipe 572, and a feed pipe 573. The spray head 571 is arranged in two rows, and the two rows of spray heads 571 are located on both sides of the blade 52. The two rows of spray heads 571 are fixedly installed on the outer wall of the sliding seat 51. The connecting pipe 572 is fixedly installed inside the sliding seat 51. The spray head 571 is connected to the connecting pipe 572. The feed pipe 573 is fixedly installed at the bottom end of the connecting pipe 572.
[0040] The drug extruder 58 includes a high-pressure drug storage chamber 581 disposed between two sets of connecting pipes 572, a drug outlet hole 582 is provided at the bottom of the blade 52, a control valve 583 is installed between the high-pressure drug storage chamber 581 and the drug outlet hole 582, and the connecting pipes 572 and the high-pressure drug storage chamber 581 are respectively connected to two sets of conveying hoses 454.
[0041] A sliding block 586 is movably inserted into the end of the sliding seat 51. A support cylinder 585 is fixedly installed inside the sliding seat 51. A lifting spring 587 is installed at the bottom of the inner part of the support cylinder 585. The bottom end of the sliding block 586 is movably inserted into the inside of the support cylinder 585. A roller 584 is rotatably connected between the two sets of sliding blocks 586. The roller 584 is slidably connected inside the valve handle of the control valve 583.
[0042] Working principle: When using this device, a gel-like drug is poured into the inside of the gel-like drug tube 3. The drug is mainly made of sterilizing agent, which is mixed with starch and water to make a colloid. Then, a sliding piston is installed at the end of the gel-like drug tube 3. The gel-like drug tube 3 is then installed at the bottom of the pruning pliers 1. Finally, an alcohol tank 2 filled with alcohol is installed at the top of the pruning pliers 1 to complete the assembly.
[0043] Before pruning, gently pull the lever 41 a few times to move the two sets of piston rods 452 backward, creating a negative pressure inside the piston cylinder 451. At this time, the material inside the alcohol tank 2 and the gelatinous medicine tube 3 is drawn into the piston cylinder 451 through the one-way valve 455, and then transported to the feed pipe 573 and the high-pressure storage chamber 581 through the conveying hose 454. The alcohol that enters the feed pipe 573 is then sprayed out through the spray head 571 to pre-disinfect the blade 52, while the gelatinous medicine that enters the high-pressure storage chamber 581...
[0044] Because the pulling amplitude of the pull rod 41 is small, the sliding blocks 586 on both sides do not make relative squeezing contact, so the control valve 583 is not opened. At this time, the gel is stored inside the high-pressure storage chamber 581, forming high pressure, waiting to be discharged.
[0045] During pruning, by pulling the lever 41 to the bottom, the lever 41 drives the two sets of wedge-shaped push blocks 53 to move backward through the traction cable 54. The wedge-shaped push blocks 53 squeeze the sliding seat 51 towards the center, compressing the memory spring 56 and causing the sliding seat 51 to move outward from inside the pruning pliers 1. At this time, the two sets of blades 52 are stacked in a staggered manner to complete the vine cutting. The cut vines are then collected by the workers. During this process, the sliding blocks 586 on both sides abut against each other, causing the sliding blocks 586 to move into the support cylinder 585, compressing the lifting spring 587. At this time, the sliding blocks 586 drive the valve handle on the outer surface of the control valve 583 to rotate through the roller 584, thereby opening the control valve 583. In this way, while cutting, a gel-like drug is applied to the roots of the vine through the drug outlet 582. The sterilizing agent can achieve a sterilization effect, and at the same time, the gel-like drug wraps the cut wound of the vine to avoid cross-infection.
[0046] Simultaneously, during the above process, the pull rod 41 drives the piston rod 452 to move outward, creating a negative pressure inside the piston cylinder 451. At this time, the materials inside the alcohol tank 2 and the gelatinous drug tube 3 are drawn into the piston cylinder 451 through the one-way valve 455. At the same time, the return spring 42 is compressed, and then the pull rod 41 is released. Under the action of the return spring 42, the piston rod 452 moves into the piston cylinder 451, allowing the conveying hose 454 to deliver the material to the feed pipe 573 and the high-pressure storage chamber 581. At the same time, the memory spring 56 pushes the two sets of sliding seats 51 to move to the sides to reset. At this time, the blade 52 is removed from the vine, and the lifting spring 587 pushes the sliding block 586 to move outward, causing the roller 584 to reset and drive the control valve 583 to close. Then, the spray head 571 sprays alcohol to disinfect the blade 52 during the reset process. At the same time, the gelatinous drug enters the high-pressure storage chamber 581, allowing the high-pressure storage chamber 581 to be replenished with drugs and maintain a high-pressure state, waiting for the next pruning to apply the drug.
[0047] By pulling the lever, the lever moves two sets of wedge-shaped push blocks backward via the traction cable. The wedge-shaped push blocks squeeze the sliding seat towards the center, compressing the memory spring and causing the sliding seat to move outward from inside the pruning shears. At this time, the two sets of blades are stacked in a staggered manner, completing the vine cutting. The cut vines are then collected by workers. During this process, the sliding blocks on both sides abut against each other, causing the sliding blocks to move into the support cylinder, compressing the lifting spring. At this time, the sliding blocks drive the valve handle on the outer surface of the control valve through the roller, thereby opening the control valve. In this way, while cutting, a gel-like medicine is applied to the roots of the vine through the medicine outlet. The sterilizing agent has a sterilizing effect, and the gel-like medicine also wraps the cut wound of the vine to avoid cross-infection.
[0048] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.
Claims
1. A pruning tool for watermelon vines during the vine-spreading stage, comprising pruning pliers (1), characterized in that, The pruning pliers (1) are equipped with an alcohol tank (2) and a gel drug tube (3) on the upper and lower sides respectively. The pruning pliers (1) are equipped with a pull-type drive component (4) inside. The pruning pliers (1) are equipped with a multi-functional scissor head (5) at the front end. The multi-functional scissor head (5) includes a sliding seat (51), a blade (52), a wedge-shaped pusher (53), a traction cable (54), an alcohol sprayer (57), and a drug extruder (58). The sliding seat (51) is slidably disposed on both sides of the front end of the pruning shears (1). The wedge-shaped pusher (53) is slidably disposed on the back of the sliding seat (51). The blade (52) is fixedly installed on the outside of the sliding seat (51). The alcohol sprayer (57) is installed on both sides of the blade (52). The drug extruder (58) is installed inside the blade (52). The traction cable (54) is fixedly connected to the end of the wedge-shaped pusher (53). The pull-type drive component (4) includes a pull rod (41), a return spring (42), and two sets of piston-type material suction devices (45). The pull rod (41) is movably inserted into the inside of the pruning pliers (1), and the return spring (42) is movably sleeved on the outer surface of the pull rod (41). The pull rod (41) is fixedly installed with the traction cable (54). The piston-type material suction device (45) is drivenly connected to the pull rod (41). The alcohol tank (2) is connected to the alcohol sprayer (57) through a set of piston-type material suction devices (45). The gelatinous drug tube (3) is connected to the drug extruder (58) through a set of piston-type material suction devices (45). The end of the pull rod (41) passes through the pruning shears (1). A sliding stop (43) is fixedly installed on the outer surface of the pull rod (41). The end of the return spring (42) abuts against the sliding stop (43). A sliding connecting frame (44) is fixedly connected to the front end of the pull rod (41). The sliding connecting frame (44) is movably sleeved on the front outer surface of the piston-type material suction device (45). The traction cable (54) is fixedly connected to the sliding connecting frame (44). The piston-type material suction device (45) includes a piston cylinder (451) and a piston rod (452); The sliding connecting frame (44) is movably sleeved on the outer surface of the piston cylinder (451), the end of the piston rod (452) is fixedly connected to the sliding stop (43), and one-way valves (455) are installed between the two sets of piston cylinders (451) and the alcohol tank (2) and the gel drug tube (3) respectively; A T-shaped shaft (55) is movably inserted into the interior of the sliding seat (51), and a memory spring (56) is movably sleeved on the outer surface of the T-shaped shaft (55). The memory spring (56) is placed inside the sliding seat (51), and the end of the T-shaped shaft (55) is fixedly connected to the inner wall of the pruning pliers (1).
2. The pruning tool for watermelon vines during the vine-spreading stage according to claim 1, characterized in that: The piston-type material suction device (45) also includes a fixing member (453), a conveying hose (454), and a one-way valve (455). The fixing member (453) is fixedly installed inside the pruning pliers (1). One end of the piston cylinder (451) is fixedly connected to the fixing member (453). The piston rod (452) is movably inserted into the other end of the piston cylinder (451). The one-way valve (455) is fixedly installed between the piston cylinder (451) and the conveying hose (454).
3. The pruning tool for watermelon vines during the vine-spreading stage according to claim 1, characterized in that: The bottom of the wedge-shaped pusher (53) is provided with a groove (59), and the T-shaped shaft (55) passes through the groove (59).
4. The pruning tool for watermelon vines during the vine-spreading stage according to claim 2, characterized in that: The alcohol sprayer (57) includes a spray head (571), a connecting pipe (572), and a feed pipe (573). The spray head (571) is arranged in two rows, and the two rows of spray heads (571) are located on both sides of the blade (52). The two rows of spray heads (571) are fixedly installed on the outer wall of the sliding seat (51). The connecting pipe (572) is fixedly installed inside the sliding seat (51). The spray head (571) is connected to the connecting pipe (572). The feed pipe (573) is fixedly installed at the bottom end of the connecting pipe (572).
5. The pruning tool for watermelon vines during the vine-spreading stage according to claim 2, characterized in that: The drug extruder (58) includes a high-pressure drug storage chamber (581) disposed between two sets of connecting pipes (572), and a drug outlet hole (582) is provided at the bottom of the blade (52). A control valve (583) is installed between the high-pressure drug storage chamber (581) and the drug outlet hole (582). The connecting pipes (572) and the high-pressure drug storage chamber (581) are respectively connected to two sets of conveying hoses (454).
6. The pruning tool for watermelon vines during the vine-spreading stage according to claim 4, characterized in that: A sliding block (586) is movably inserted into the end of the sliding seat (51), and a support cylinder (585) is fixedly installed inside the sliding seat (51). A lifting spring (587) is installed at the bottom of the inner side of the support cylinder (585).
7. The pruning tool for watermelon vines during the vine-spreading stage according to claim 6, characterized in that: The bottom end of the sliding block (586) is movably inserted into the interior of the support cylinder (585); A roller (584) is rotatably connected between the two sets of sliding blocks (586), and the roller (584) is slidably connected inside the valve handle of the control valve (583).