Airflow guide potato stubble treatment method used before harvesting of potato machine

Abstract

The invention provides an airflow guide potato stubble treatment method used before harvesting of a potato machine. The airflow guide potato stubble treatment method is characterized in that the potato stubble treatment method is divided into the four stages of a fine seedling vine blowing stage, a seedling vine missing and killing suspension stage, a seedling vine supporting stage and a seedling vine and seedling stubble clamping and pulling and ridge pressing and compacting stage; the potato stubble processing device comprises a fan, a broken seedling blowing pipe, a seedling vine suspension pipe, a seedling supporting device and a flexible seedling pulling mechanism, and high-speed airflow blown out of an air outlet of the fan can continuously blow out uniform high-speed airflow through air holes formed in the inner side of a fork and the side face parallel to the fork-shaped plane of the broken seedling blowing pipe. An air inlet of the fan continuously sucks air flow at a high speed through air holes formed in the inner side of a fork through a seedling vine suspension pipe, seedling vines which are missed to be killed by the seedling killing machine are sucked up to be in a suspension state, the front end of a curved surface of the seedling supporting device extends between the two sides of a potato ridge and the seedling vines, and ridge-imitating dense soil pressing components of the flexible seedling pulling mechanism are pressed and attached to the top and the two sides of the potato ridge. High-quality and high-efficiency separation of the potato stubbles can be realized, and the separation burden of subsequent mechanically-harvested potato seedlings is relieved.

Description

Technical Field

[0001] The present invention provides an air flow guiding stubble treatment method for before potato machine harvesting, which is mainly used for the treatment operations of the fine vines at the top and both sides of the potato ridges before machine harvesting, as well as the vines that are not killed, attached to the top and both sides of the potato ridges. Background Art

[0002] Before potato machine harvesting operations, generally, mechanized vine killing operations need to be carried out to crush and scatter the vine weeds back into the field to ensure the smoothness of the harvesting process; at the same time, timely vine killing operations can accelerate the aging of the cork layer of the potato skin and reduce the skin-breaking rate and potato injury rate during machine harvesting. However, to avoid damage to the potato tubers by the crushing knives of the vine killer, the stubble height of the vines is generally 100 - 150 mm. Therefore, there are problems of low vine removal rate and relatively large stubble height of the vine stubble, forcing the combine harvester to add functions of "vine pulling" and "potato picking" to achieve the detachment and separation of potato tubers and vines; the remaining vine stubble after vine killing is flexible and easy to cause "hanging, entanglement, and blockage", often resulting in incomplete separation in the machine harvesting link, and a large amount of vine stubble mixes into the potato collection area, requiring secondary cleaning, resulting in low operation efficiency, high impurity removal cost, and inducing skin-breaking damage, and there is a problem of "the machine is not easy to use", which severely restricts the development of high-end potato harvesting equipment.

[0003] The residual vine stubble causing the decline of separation and cleaning ability and harvesting quality is the core problem restricting the quality of potato combine harvesting operations, and it is also the pain point, difficulty, and bottleneck in this field. Through the comparative test of vine stubble extraction and non-extraction treatment, it is found that artificial auxiliary extraction of vine stubble 5 - 7 days before harvesting, compared with conventional mechanized vine killing, the potato has enhanced the ability to resist skin-breaking damage due to the aging of the epidermal cork layer, and the skin-breaking damage has been alleviated to a certain extent. From the analysis of the harvesting test, it can be seen that due to the removal of the vine stubble, phenomena such as "hanging, entanglement, and blockage" are eliminated, the separation efficiency is significantly improved, and the impurity content rate is significantly decreased. It is found that it is difficult to achieve an ideal potato-stubble separation effect for some vines creeping on the side of the ridge simply by mechanical clamping and pulling. In addition, the fine vines remaining on the top and both sides of the potato ridges after the potato vine killer kills the vines entering the potato combine harvester will also increase the separation and impurity removal burden of the machine. If it is possible to move forward the potato-stubble separation step in the potato machine harvesting link under the premise of ensuring the potato harvesting quality and directly carry out treatment operations on the fine vines at the top and both sides of the potato ridges before potato machine harvesting, as well as the vines that are not killed and attached to the top and both sides of the potato ridges, it has important practical significance for potato mechanized harvesting. Therefore, there is an urgent need for an air flow guiding stubble treatment method for before potato machine harvesting to solve the problem of the difficult vine separation and impurity removal burden of the potato harvester.

[0004] Looking at the current situation of the potato harvesting machinery industry, there is an urgent need for an air flow guiding potato stubble treatment method before potato machine harvesting that has good treatment effects on the fragmented vines at the top and both sides of the potato ridge, has no missed killing, has a high removal rate of the vines attached to the top and both sides of the potato ridge, and ensures the quality of potato harvesting. Summary of the Invention

[0005] The object of the present invention is to provide an air flow guiding potato stubble treatment method before potato machine harvesting that can reduce the burden of vine separation and impurity removal of potato harvesting equipment, has good treatment effects on the fragmented vines at the top and both sides of the potato ridge, has no missed killing, has a high removal rate of the vines attached to the top and both sides of the potato ridge, and can ensure the quality of potato harvesting.

[0006] Its technical solution is as follows: The air flow guiding potato stubble treatment method before potato machine harvesting is divided into four stages: the fragmented vine blowing stage, the missed killing vine suspension stage, the vine supporting stage, and the vine and stubble clamping and pulling and ridge compaction stage; The potato stubble treatment device used in the air flow guiding potato stubble treatment method before potato machine harvesting includes a fan, a broken vine blowing pipe, a vine suspension pipe, a vine supporting device, and a flexible vine pulling mechanism. Among them, the fan is located in the front of the stubble treatment device and above the potato ridge; Both the broken vine blowing pipe and the vine suspension pipe are in the shape of a "fork" flat shape imitating the ridge shape, and there are multiple air holes on the inner side of the "fork"; The side of the broken vine blowing pipe parallel to the "fork" plane also has multiple air holes; The "fork" - shaped connecting end of the broken vine blowing pipe is connected to the air outlet of the fan, and the "fork" - shaped connecting end of the vine suspension pipe is connected to the air inlet of the fan, and the broken vine blowing pipe is located in front of the vine suspension pipe in the advancing direction of the machine; The two "fork" - shaped pipes of the broken vine blowing pipe and the vine suspension pipe are respectively placed on both sides of the potato ridge, the ends of the two "fork" - shaped pipes of the broken vine blowing pipe are inclined forward in the advancing direction of the machine, and the side air holes of the broken vine blowing pipe face forward in the advancing direction of the machine; The vine supporting device is in a curved surface shape and is symmetrically arranged on the left and right above and on both sides of the potato ridge. The vine supporting device is located behind the vine suspension pipe away from the broken vine blowing pipe and is arranged in an inclined state with the front low and the rear high; The flexible vine pulling mechanism adopts a flexible clamping and pulling method and is provided with a ridge - shaped compacting soil structure. The flexible vine pulling mechanism is arranged above the potato ridge, symmetrically arranged with respect to the width direction of the potato ridge, and is located behind the vine supporting device away from the broken vine blowing pipe; The air flow guiding potato stubble treatment method is as follows: Ⅰ. Fine shredded vine blowing stage: The high-speed air flow blown out from the air outlet of the fan can continuously blow out a uniform high-speed air flow through the air holes on the inner side of the "fork" of the shredded vine blowing pipe and the side surface parallel to the "fork" plane. The blown air flow includes two directions, towards the surface of the potato ridge and the front in the advancing direction of the machine. The continuous high-speed air flow blown out from the air holes of the shredded vine blowing pipe blows the fine shredded vines scattered on the top and both sides of the potato ridge by the potato vine killer to the ridge ditch. By adjusting the rotation speed of the fan and the size, shape and position of the air holes, the air flow speed and blowing direction of the air holes of the shredded vine blowing pipe can be changed to adapt to the fine shredded vine blowing of different vine growth conditions, different harvesting times and different crushing effects of the potato vine killer. Ⅱ. Suspension stage of missed-killed vines: The air inlet of the fan continuously sucks in high-speed air through the air holes on the inner side of the "fork" of the vine suspension pipe, sucking up the vines missed by the potato vine killer attached to the upper part and both sides of the potato ridge to a suspended state. By adjusting the rotation speed of the fan or the size, shape and position of the air holes, the suspension air flow speed generated by the air holes of the vine suspension pipe can be changed to adapt to the suspension of missed-killed vines in different vine attachment postures, different harvesting times and different vine missed-killing situations of the potato vine killer. Ⅲ. Vine supporting stage: When the vines missed by the potato vine killer are sucked up and leave the potato ridge and are in a suspended state, the curved front end of the vine supporting device extends between the two sides of the potato ridge and the vines. As the curve of the vine supporting device changes, the vines are gradually supported and guided towards the top of the potato ridge, and finally guided to the center of the potato ridge width direction at the top of the potato ridge. Ⅳ. Vine and stubble clamping, pulling and ridge compacting stage: When the vines missed by the potato vine killer are continuously supported and guided to the front end of the flexible vine pulling mechanism, the flexible vine pulling mechanism performs a clamping and pulling operation on the vines and stubbles. The flexible clamping and pulling components of the flexible vine pulling mechanism "pull out" the vines together with the stubbles "by the roots". At the same time, the ridge-shaped compacting soil component of the flexible vine pulling mechanism is pressed against the top and both sides of the potato ridge to prevent the potatoes from being taken out during the clamping and pulling process, resulting in the "green head" phenomenon. At the same time, the hard soil blocks of the potato ridge can be crushed to facilitate subsequent harvesting operations.

[0007] Compared with the current situation in the existing field, the present invention adopts an air flow guiding stubble treatment method before potato machine harvesting, introduces a stubble treatment method of pneumatic blowing and crushing of vines, air flow suspension guiding and flexible clamping and pulling collaborative operation into the potato-stubble separation link of potato mechanized harvesting, innovatively advances the potato-stubble separation step in the machine harvesting link, directly blows the crushed vines to the furrow without damaging the potatoes, conducts a stable and orderly clamping and pulling operation on the remaining stubbles, and compacts the potato ridges after the clamping and pulling operation, thus greatly reducing the burden of potato-stubble separation of the potato harvester and effectively preventing the phenomenon of vine entanglement with the key components of the harvester. During the operation process, first, the crushed vine blowing pipe installed at the air outlet of the fan is used to blow the fine vines distributed on the top and both sides of the potato ridge after the vine killing operation of the potato vine killer into the furrow, which can effectively reduce the burden of separating and removing impurities of the fine vines during the digging operation of the harvester; during the blowing process of the fine vines, the air flow speed and blowing direction of the air holes of the crushed vine blowing pipe can be changed by adjusting the rotation speed of the fan and adjusting the size, shape and position of the air holes, so as to adapt to the blowing of fine vines with different vine growth conditions, different harvesting times and different crushing effects of different potato vine killers, and improve the adaptability of different blowing working conditions; secondly, through the combined action of the vine suspension pipe arranged at the air inlet of the fan, the vine supporting device and the flexible vine pulling mechanism arranged behind the vine suspension pipe, the potato stubble clamping and pulling operation based on the interaction of air flow pressure energy and clamping and pulling mechanical energy is realized, mainly for the vines that are missed in killing and attached to the top and both sides of the potato ridge for clamping and pulling treatment. The flexible clamping and pulling components of the flexible vine pulling mechanism "pull up" the vines together with the stubbles, solving the problem that it is difficult to remove the potato stubbles under the action of the separation and impurity removal components, and can greatly reduce the impurity content rate of the potato combine harvesting equipment; during the suspension process of the missed vines, the suspension air flow speed generated by the air holes of the vine suspension pipe can be changed by adjusting the rotation speed of the fan or adjusting the size, shape and position of the air holes, so as to adapt to the suspension of the missed vines with different vine attachment postures, different harvesting times and different vine killing situations of different potato vine killers, and improve the adaptability of different suspension working conditions. Finally, the ridge-shaped dense soil pressing component of the flexible vine pulling mechanism is pressed on the top and both sides of the potato ridge to prevent the potatoes from being taken out during the clamping and pulling process and causing the "green head" phenomenon, and at the same time, the hard soil blocks of the potato ridge can be crushed to facilitate the subsequent harvesting operation of the potato combine harvester, avoid large soil blocks from entering the harvester and being difficult to break up and separate, and effectively solve the problems of mechanical damage and skin breakage caused by the collision and impact of dry and hard soil blocks and potato blocks during the harvesting process. Therefore, by adopting the air flow guiding stubble treatment method before potato machine harvesting of the present invention, through the collaborative cooperation of fine vine blowing, missed vine suspension, vine support, vine and stubble clamping and pulling and ridge compaction, it is beneficial to improve the reliability of the potato combine harvesting equipment while reducing the impurity content rate, damaged potato rate and skin breakage rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of an embodiment of the present invention. Detailed implementation manner

[0009] 1. Fan 2. Broken seedling blowing pipe 3. Seedling vine suspension pipe 4. Seedling supporting device 5. Flexible seedling pulling mechanism.

[0010] In Figure 1 In the shown embodiment: The air flow guiding potato stubble treatment method is divided into four stages: the fine broken seedling blowing stage, the missed killed seedling vine suspension stage, the seedling vine supporting stage, and the seedling stubble clamping and pulling and ridge pressing and compacting stage; The fan 1 of the stubble treatment device used for the air flow guiding potato stubble treatment method before potato machine harvesting is located at the front of the stubble treatment device and above the potato ridge; Both the broken seedling blowing pipe 2 and the seedling vine suspension pipe 3 are in the shape of a "fork" flat shape imitating the ridge shape, and a plurality of air holes are provided on the inner side of the "fork", and a plurality of air holes are also provided on the side surface of the broken seedling blowing pipe 2 parallel to the "fork" plane; The "fork" - shaped connecting end of the broken seedling blowing pipe 2 is connected to the air outlet of the fan 1, and the "fork" - shaped connecting end of the seedling vine suspension pipe 3 is connected to the air inlet of the fan 1, and the broken seedling blowing pipe 2 is located in front of the seedling vine suspension pipe 3 in the advancing direction of the machine; The two "fork" - shaped pipes of the broken seedling blowing pipe 2 and the seedling vine suspension pipe 3 are respectively placed on both sides of the potato ridge, the ends of the two "fork" - shaped pipes of the broken seedling blowing pipe 2 are inclined forward in the advancing direction of the machine, and the side air holes of the broken seedling blowing pipe 2 face forward in the advancing direction of the machine; The seedling supporting device 4 is in a curved surface shape and is symmetrically arranged on the left and right above and on both sides of the potato ridge. The seedling supporting device 4 is located behind the seedling vine suspension pipe 3 away from the broken seedling blowing pipe 2 and is arranged in an inclined state with the front lower and the rear higher; The flexible seedling pulling mechanism 5 adopts a flexible clamping and pulling method and is provided with a ridge - imitating dense soil - pressing structure. The flexible seedling pulling mechanism 5 is arranged above the potato ridge, symmetrically arranged with respect to the width direction of the potato ridge, and is located behind the seedling supporting device 4 away from the broken seedling blowing pipe 2; The air flow guiding potato stubble treatment method is as follows: Ⅰ. Fine broken seedling blowing stage: The high - speed air flow blown out from the air outlet of the fan 1 can continuously blow out a uniform high - speed air flow through the air holes provided on the inner side of the "fork" and the side surface parallel to the "fork" plane of the broken seedling blowing pipe 2, and the blown air flow includes two directions, namely towards the surface of the potato ridge and the front in the advancing direction of the machine. The continuous high - speed air flow blown out from the air holes of the broken seedling blowing pipe 2 blows the fine broken seedlings scattered on the top and both sides of the potato ridge by the potato seedling killing machine to the ridge ditch; Adjusting the rotation speed of the adjustable fan (1) and adjusting the size, shape and position of the air holes can change the air flow speed and blowing direction of the air holes of the broken seedling blowing pipe 2 to adapt to the fine broken seedling blowing of different seedling vine growth conditions, different harvesting times and different crushing effects of the potato seedling killing machine; Ⅱ Leakage-killing vine suspension stage: The air inlet of the fan 1 continuously sucks in high-speed air through the air holes on the inner side of the "fork" of the vine suspension pipe 3, sucking up the vines that are missed by the potato vine-killing machine and adhering to the upper and both sides of the potato ridges to the suspended state; adjusting the rotation speed of the fan 1 or adjusting the size, shape and position of the air holes can change the suspension air flow speed generated by the air holes of the vine suspension pipe 3 to adapt to the leakage-killing vine suspension of different vine adhering postures, different harvesting times and different vine leakage-killing situations of different potato vine-killing machines. Ⅲ Vine support stage: When the vines missed by the potato vine-killing machine are sucked up and leave the potato ridges and are in a suspended state, the front end of the curved surface of the vine support device 4 extends between the two sides of the potato ridges and the vines. As the curved surface of the vine support device 4 changes, the vines are gradually supported and guided towards the top of the potato ridges, and finally guided to the center of the potato ridge width at the top of the potato ridges. Ⅳ Vine and stubble clamping, pulling and ridge compacting stage: When the vines missed by the potato vine-killing machine are continuously supported and guided to the front end of the flexible vine pulling mechanism 5, the flexible vine pulling mechanism 5 performs a clamping and pulling operation on the vines and the stubs. The flexible clamping and pulling components of the flexible vine pulling mechanism 5 "pull out" the vines together with the stubs; at the same time, the ridge-shaped soil compacting component of the flexible vine pulling mechanism 5 is pressed against the top and both sides of the potato ridges to prevent the potatoes from being taken out during the clamping and pulling process, resulting in the "green head" phenomenon, and at the same time, the hard soil blocks of the potato ridges can be crushed to facilitate subsequent harvesting operations.

[0011] Its working principle is as follows: An air flow guiding method for stubble treatment before potato machine harvesting is adopted. As the machine moves forward, during the stage of blowing fragmented vines, for the fragmented vines scattered on the top and both sides of the potato ridges after being crushed by a potato vine killer, they are blown by the high-speed air flow output through the air holes on the inner side of the "fork" and the side parallel to the "fork" plane of the crushed vine blowing pipe at the air outlet of the fan, and are blown along the surface of the potato ridge and in the forward direction of the machine to the furrow. For the working conditions of blowing fragmented vines with different vine growth conditions, different harvesting times, and different crushing effects of the potato vine killer, the air flow speed and blowing direction of the air holes of the crushed vine blowing pipe can be changed by adjusting the rotational speed of the fan and adjusting the size, shape, and position of the air holes, so as to improve and ensure the blowing effect of fragmented vines; during the stage of suspending missed-killed vines, for the vines missed by the potato vine killer and attached to the upper part and both sides of the potato ridges, they are in a suspended state by the continuous high-speed suction air flow output through the air holes on the inner side of the "fork" of the vine suspension pipe installed at the air inlet of the fan. During the process of suspending missed-killed vines, for the working conditions of suspending missed-killed vines with different vine attachment postures, different harvesting times, and different vine missed-killing situations of the potato vine killer, the suspension air flow speed generated by the air holes of the vine suspension pipe can be changed by adjusting the rotational speed of the fan or adjusting the size, shape, and position of the air holes, so as to improve and ensure the suspension effect of the vines attached to the upper part and both sides of the potato ridges; during the stage of supporting vines, the curved front end of the vine support device extends between both sides of the potato ridge and the vines in a suspended state, and is used to guide the vines missed by the potato vine killer and attached to the upper part and both sides of the potato ridge to the center in the width direction of the potato ridge at the top of the potato ridge. When the vines missed by the potato vine killer are continuously supported and guided to the front end of the flexible vine pulling mechanism, the flexible vine pulling mechanism performs a clamping and pulling operation on the vines and stubbles, and the flexible clamping and pulling components of the flexible vine pulling mechanism "pull out" the vines together with the stubbles "by the roots"; during the stage of clamping, pulling vines and stubbles and compacting the ridges, the ridge-shaped compacting soil components of the flexible vine pulling mechanism pressed on the top and both sides of the potato ridge can prevent potatoes from being taken out during the clamping and pulling process and cause the phenomenon of "green heads", and at the same time can crush the hard soil blocks of the potato ridge, which is beneficial to subsequent mechanized harvesting operations.

Claims

1. An air flow guiding stubble treatment method before potato machine harvesting, characterized in that: The air flow guiding potato stubble treatment method is divided into four stages: the stage of finely crushing and blowing the vine, the stage of suspending the missed-killed vine, the stage of supporting the vine, and the stage of clamping and pulling the vine and stubble and compacting the ridge. The potato stubble treatment device used for the air flow guiding potato stubble treatment method before potato harvesting includes a blower (1), a vine crushing and blowing pipe (2), a vine suspending pipe (3), a vine supporting device (4), and a flexible vine pulling mechanism (5). Among them, the blower (1) is located at the front of the stubble treatment device and above the potato ridge. Both the vine crushing and blowing pipe (2) and the vine suspending pipe (3) are in the shape of a "fork" which is an imitation of the ridge shape and flat, and there are a plurality of air holes on the inner sides of the "forks". There are also a plurality of air holes on the side surface of the vine crushing and blowing pipe (2) parallel to the "fork" plane. The "fork" - shaped connecting end of the vine crushing and blowing pipe (2) is connected to the air outlet of the blower (1), and the "fork" - shaped connecting end of the vine suspending pipe (3) is connected to the air inlet of the blower (1). And the vine crushing and blowing pipe (2) is located in front of the vine suspending pipe (3) in the advancing direction of the machine. The two "fork" - shaped pipes of the vine crushing and blowing pipe (2) and the vine suspending pipe (3) are respectively placed on both sides of the potato ridge. The ends of the two "fork" - shaped pipes of the vine crushing and blowing pipe (2) are inclined forward in the advancing direction of the machine, and the side air holes of the vine crushing and blowing pipe (2) face forward in the advancing direction of the machine. The vine supporting device (4) is in a curved surface shape and is symmetrically arranged on the left and right above and on both sides of the potato ridge. The vine supporting device (4) is located behind the vine suspending pipe (3) away from the vine crushing and blowing pipe (2), and the vine supporting device (4) is arranged in an inclined state with the front end lower and the rear end higher. The flexible vine pulling mechanism (5) adopts a flexible clamping and pulling method and is provided with a ridge - imitating compacting soil structure. The flexible vine pulling mechanism (5) is arranged above the potato ridge, symmetrically arranged with respect to the width direction of the potato ridge, and is located behind the vine supporting device (4) away from the vine crushing and blowing pipe (2). The air flow guiding potato stubble treatment method is as follows: Ⅰ. The stage of finely crushing and blowing the vine: The high - speed air flow blown out from the air outlet of the blower (1) can continuously blow out a uniform high - speed air flow through the air holes on the inner side of the "fork" and the side surface parallel to the "fork" plane of the vine crushing and blowing pipe (2). And the blown air flow includes two directions, namely towards the surface of the potato ridge and the front in the advancing direction of the machine. The continuous high - speed air flow blown out from the air holes of the vine crushing and blowing pipe (2) blows the finely crushed vines scattered on the top and both sides of the potato ridge by the potato vine killer to the ridge ditch. By adjusting the rotation speed of the blower (1) and adjusting the size, shape and position of the air holes, the air flow speed and blowing direction blown out from the air holes of the vine crushing and blowing pipe (2) can be changed to adapt to the finely crushed vines with different vine growth conditions, different harvesting times and different crushing effects of the potato vine killer. Ⅱ Suspended stage of missed-killing vines: The air inlet of the blower (1) continuously sucks in high-speed air through the air holes on the inner side of the "fork" of the vine suspension pipe (3), sucking up the vines missed by the potato vine-killing machine that are attached to the upper and both sides of the potato ridge to a suspended state; adjusting the rotational speed of the blower (1) or adjusting the size, shape, and position of the air holes can change the suspended air flow speed generated by the air holes of the vine suspension pipe (3) to adapt to the suspended state of missed-killing vines with different vine attachment postures, different harvesting times, and different vine missed-killing situations of potato vine-killing machines. Ⅲ Vine supporting stage: When the vines missed by the potato vine-killing machine are sucked up and leave the potato ridge and are in a suspended state, the curved front end of the vine supporting device (4) extends between the two sides of the potato ridge and the vines. As the curve of the vine supporting device (4) changes, the vines are gradually supported and guided towards the top of the potato ridge, and finally guided to the center of the potato ridge width direction at the top of the potato ridge. Ⅳ Vine and stubble clamping, pulling, and ridge compacting stage: When the vines missed by the potato vine-killing machine are continuously supported and guided to the front end of the flexible vine pulling mechanism (5), the flexible vine pulling mechanism (5) performs a clamping and pulling operation on the vines and stubbles. The flexible clamping and pulling components of the flexible vine pulling mechanism (5) "pull out" the vines together with the stubbles "by the roots"; at the same time, the ridge-shaped soil compacting component of the flexible vine pulling mechanism (5) presses on the top and both sides of the potato ridge to prevent the potatoes from being taken out during the clamping and pulling process, resulting in the phenomenon of "green heads", and at the same time, the hard soil blocks on the potato ridge can be crushed to facilitate subsequent harvesting operations.

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