Air curtain residue barrier, picker head, and cotton harvester
Patent Information
- Application Number
- CN202611410243.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-09-11
- Publication Date
- 2026-10-16
AI Technical Summary
棉田因地膜覆盖种植而残留的大量残膜极易在负压作用下被吸入采摘头，引发一系列问题：一方面，残膜混入籽棉会降低采摘纯度，显著增加后续异纤分离的加工成本；另一方面，残膜易缠绕、堵塞采摘头辊轴及输送通道等核心部件，会导致设备作业效率骤降，设备清理与维护的人工、时间成本大幅增加
本发明提供一种气幕式残膜阻隔装置、采摘头和采棉机，包括侧板和封盖板，侧板的两端均设置有开口，封盖板与侧板的一端连接，侧板的另一端用于与采摘头的底板本体固定且密封连接，封盖板能够密封侧板远离底板本体的一端的开口或打开侧板远离底板本体的一端的开口，封盖板、侧板和底板本体能够围合成气流腔体，侧板上设置有入风口和至少一个射流出口，入风口和各射流出口均与气流腔体连通；气流腔体内的气体经射流出口射出后能够在漏杂孔处形成气幕，以阻隔地表的残膜在采摘头的负压作用下经漏杂孔被吸入采摘头内。封盖板覆盖于气流腔体的开口处，一方面能够与侧板、底板本体形成气流腔体，另一方面能够在需要对气流腔体内灰尘等进行清理时，打开侧板的上端开口，以降低清理难度，提高清理效率，更好地满足采棉机田间连续作业需求。侧板集成在底板本体，底板本体作为构成气流腔室的一部分，能够在采棉机的原底板上直接构建气流腔体及射流结构，实现气幕阻隔功能的一体化设计，避免了传统分体式气幕装置安装复杂的问题，大大简化了结构，简化了安装过程，提高了整体适配性。
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Figure CN122910778A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of agricultural machinery technology, and in particular to an air curtain-type residual film blocking device, a picking head, and a cotton harvester. Background Technology
[0002] In mechanized cotton harvesting, cotton harvesters generally employ a self-propelled horizontal spindle harvesting method. The seed cotton is conveyed internally by a suction fan generating negative pressure. Simultaneously, to ensure harvesting efficiency, the bottom plate of the harvesting head has multiple leakage holes. These holes cannot be sealed and, under negative pressure, become the main channels for sucking up residual plastic film from the ground surface. The large amount of residual plastic film left in cotton fields due to plastic film mulching is easily sucked into the harvesting head under negative pressure, causing a series of problems: Firstly, the residual film mixed with seed cotton reduces harvesting purity, significantly increasing the processing cost of subsequent fiber separation; secondly, the residual film easily entangles and clogs core components such as the harvesting head rollers and conveying channels, leading to a sharp drop in equipment operating efficiency and a significant increase in the labor and time costs of equipment cleaning and maintenance.
[0003] To address the problem of residual film being sucked up by negative pressure, an air curtain-type residual film blocking device was proposed. However, the airflow chambers of the known air curtain-type residual film blocking devices are mostly fully enclosed integrated structures. After long-term operation in high-dust field environments, impurities such as cotton fibers and soil particles easily accumulate inside, leading to uneven airflow distribution and abnormal air curtain pressure and speed. Furthermore, the integrated structure lacks a dedicated dust removal channel, requiring complete disassembly for cleaning, resulting in extremely low maintenance efficiency and failing to meet the needs of continuous cotton harvester operation in the field. Some air curtain-type residual film blocking devices are independent structures, with a separate design from the picking head base plate, requiring additional assembly and fixing processes. This not only makes the installation process cumbersome but also results in poor overall compatibility.
[0004] Therefore, there is an urgent need to design an air curtain-type residual film barrier device that is integrated with the bottom plate of the harvesting head, easy to install, and easy to clean. Summary of the Invention
[0005] The purpose of this invention is to provide an air curtain-type residual film blocking device, a picking head, and a cotton harvester to solve the problems existing in the prior art, reduce cleaning difficulty, improve cleaning efficiency, and better meet the needs of continuous field operation of cotton harvesters; it can also greatly simplify the structure, simplify the installation process, and improve overall adaptability.
[0006] To achieve the above objectives, the present invention provides the following solution: This invention provides an air curtain-type residual film blocking device, including a side plate and a cover plate. Both ends of the side plate have openings. The cover plate is connected to one end of the side plate, and the other end of the side plate is fixedly and sealed to the base plate of the harvesting head. The cover plate can seal the opening at the end of the side plate away from the base plate or open the opening at the end of the side plate away from the base plate. The cover plate, the side plate, and the base plate can form an airflow cavity. The side plate is provided with an air inlet and at least one jet outlet, both of which are connected to the airflow cavity. Gas within the airflow cavity, after being ejected through the jet outlet, can form an air curtain at the leakage hole of the base plate, thus preventing residual film from being drawn into the harvesting head through the leakage hole under the negative pressure of the harvesting head.
[0007] In one embodiment, at least one locking device is further included, which is connected to both the side plate and the cover plate. The locking device has a locked state and an unlocked state. When the locking device is in the locked state, the cover plate is pressed against the side plate. When the locking device is in the unlocked state, the cover plate can be separated from the side plate.
[0008] In one embodiment, a sealing strip is further included, the sealing strip being disposed between the cover plate and the side plate near the opening of the cover plate.
[0009] In one embodiment, the locking device includes a hook, a body, a handle, and a pull ring. The handle is rotatably connected to the body so that the end of the handle away from the hook can approach or move away from the hook. The pull ring is connected to the body, the hook is fixedly connected to the cover plate, and the body is fixedly connected to the side plate. When the locking device is in the locked state, the pull ring engages with the hook and presses the cover plate against the side plate. When the locking device is in the unlocked state, the pull ring disengages from the hook and allows the cover plate to separate from the side plate.
[0010] In one embodiment, the jet outlet corresponds one-to-one with the leakage hole, or each leakage hole corresponds to at least one jet outlet.
[0011] In one embodiment, the jet outlet is slit-shaped.
[0012] In one embodiment, there are multiple locking devices, which are arranged along the outer periphery of the side plate.
[0013] The present invention also provides a harvesting head, including a harvesting body and the aforementioned air curtain residual film blocking device, wherein the bottom of the harvesting body has the aforementioned base plate body, and the base plate body is provided with at least one of the aforementioned leakage holes, and the end of the side plate away from the cover plate is fixedly connected to the base plate body.
[0014] In one embodiment, there are multiple leakage holes, and the airflow cavity is disposed between all the leakage holes.
[0015] The present invention also provides a cotton harvester, including a frame, a picking head and the aforementioned air curtain residual film blocking device, wherein the bottom of the picking body has the aforementioned base plate body, the base plate body is provided with at least one of the aforementioned leakage holes, and the end of the side plate away from the cover plate is fixedly connected to the base plate body; the picking head is disposed on the frame.
[0016] The present invention achieves the following technical effects compared to the prior art: This invention provides an air curtain-type residual film blocking device, a picking head, and a cotton harvester, including a side plate and a cover plate. Both ends of the side plate have openings. The cover plate is connected to one end of the side plate, and the other end of the side plate is fixed and sealed to the bottom plate of the picking head. The cover plate can seal the opening at the end of the side plate away from the bottom plate or open the opening at the end of the side plate away from the bottom plate. The cover plate, side plate, and bottom plate can enclose an airflow cavity. The side plate has an air inlet and at least one jet outlet, both of which are connected to the airflow cavity. Gas within the airflow cavity is ejected through the jet outlets, forming an air curtain at the leakage hole to prevent residual film from being drawn into the picking head through the leakage hole under the negative pressure of the picking head. The cover plate covers the opening of the airflow cavity, forming an airflow cavity with the side plate and the base plate. It also allows for easy cleaning of dust and other debris within the airflow cavity by opening the upper opening of the side plate, reducing cleaning difficulty, increasing efficiency, and better meeting the continuous operation requirements of cotton harvesters in the field. The side plate is integrated into the base plate, which, as part of the airflow cavity, allows for the direct construction of the airflow cavity and jet structure on the original base plate of the cotton harvester. This integrated design achieves air curtain barrier functionality, avoiding the complex installation issues of traditional split-type air curtain devices, greatly simplifying the structure and installation process, and improving overall adaptability. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments 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.
[0018] Figure 1 This is a schematic diagram of the harvesting head provided by the present invention; Figure 2 A bottom view of the harvesting head provided by the present invention (the dashed box indicates the area of the leakage hole). Figure 3 A schematic diagram of the structure of the air curtain-type residual film barrier device on the base plate body provided by the present invention; Figure 4 This is a schematic diagram of airflow diversion provided by the present invention; Figure 5 Exploded view of the cover plate and sealing strip provided by the present invention; Figure 6 This is a schematic diagram of the locking and clamping device provided by the present invention; Figure 7 This is a front view of the locking and clamping device provided by the present invention; Figure 8 for Figure 7 The right view; Figure 9 This is a schematic diagram of the locking mechanism provided by the present invention during locking. Figure 10 This is a schematic diagram of the locking device provided by the present invention during unlocking; In the diagram: 100, Air curtain type residual film blocking device; 200, Harvesting head; 1, Side plate; 101, Air inlet; 102, Jet outlet; 2, Cover plate; 3, Bottom plate body; 301, Impurity leakage hole; 4, Airflow cavity; 5, Residual film; 6, Locking and pressing device; 601, Hook; 602, Main body; 603, Handle; 604, Pull ring; 7, Sealing strip; 8, Conveying channel; 9, Air duct; 10, Fan. Detailed Implementation
[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and 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.
[0020] It should be noted that in the description of this invention, the terms "upper," "lower," "left," "right," "inner," "outer," "front," "rear," "center," "longitudinal," "transverse," "length," "width," "thickness," "vertical," "horizontal," "top," "bottom," "clockwise," and "counterclockwise," etc., indicating directional or positional relationships, are based on the directional or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0021] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.
[0022] The purpose of this invention is to provide an air curtain-type residual film blocking device, a picking head, and a cotton harvester to solve the problems existing in the prior art, reduce cleaning difficulty, improve cleaning efficiency, and better meet the needs of continuous field operation of cotton harvesters; it can also greatly simplify the structure, simplify the installation process, and improve overall adaptability.
[0023] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0024] Example 1 like Figures 1-10As shown, this embodiment provides an air curtain type residual film blocking device 100, including a side plate 1 and a cover plate 2. Both ends of the side plate 1 are provided with openings. The cover plate 2 is connected to one end of the side plate 1, and the other end of the side plate 1 is used to fix and seal the bottom plate body 3 of the harvesting head 200. The cover plate 2 can seal the opening at the end of the side plate 1 away from the bottom plate body 3 or open the opening at the end of the side plate 1 away from the bottom plate body 3. The cover plate 2, the side plate 1 and the bottom plate body 3 can form an airflow cavity 4. The side plate 1 is provided with an air inlet 101 and at least one jet outlet 102. The air inlet 101 and each jet outlet 102 are connected to the airflow cavity 4. After the gas in the airflow cavity 4 is ejected through the jet outlet 102, it can form an air curtain at the leakage hole 301 to prevent the residual film 5 on the ground surface from being sucked into the harvesting head 200 through the leakage hole 301 under the negative pressure of the harvesting head 200. The cover plate 2 covers the opening of the airflow cavity 4. On the one hand, it forms the airflow cavity 4 with the side plate 1 and the base plate 3. On the other hand, when it is necessary to clean dust and other debris from the airflow cavity 4, the upper opening of the side plate 1 can be opened to reduce cleaning difficulty, improve cleaning efficiency, and better meet the needs of continuous operation of cotton harvesters in the field. The side plate 1 is integrated into the base plate 3. As part of the airflow cavity, the base plate 3 can directly construct the airflow cavity 4 and jet structure on the original base plate of the cotton harvester, realizing an integrated design of air curtain barrier function. This avoids the complex installation problem of traditional split air curtain devices, greatly simplifies the structure and installation process, and improves overall adaptability.
[0025] In some embodiments, at least one locking and clamping device 6 is also included. The locking and clamping device 6 is connected to both the side plate 1 and the cover plate 2. The locking and clamping device 6 has a locked state and an unlocked state. When the locking and clamping device 6 is in the locked state, the cover plate 2 is pressed tightly against the side plate 1. When the locking and clamping device 6 is in the unlocked state, the cover plate 2 can be separated from the side plate 1. It should be noted that the above separation means that the cover plate 2 can be completely detached from the side plate 1 for disassembly, which facilitates cleaning of the rear air column of the cotton harvester or the mixture of mud and cotton wool that has entered the cavity.
[0026] In some embodiments, a sealing strip 7 is also included, which is disposed between the cover plate 2 and the side plate 1 near the opening of the cover plate 2.
[0027] In some embodiments, the locking and clamping device 6 includes a hook 601, a body 602, a handle 603, and a pull ring 604. The handle 603 is rotatably connected to the body 602 so that the end of the handle 603 away from the hook 601 can approach or move away from the hook 601. The pull ring 604 is connected to the body 602. The hook 601 is fixedly connected to the cover plate 2, and the body 602 is fixedly connected to the side plate 1. When the locking and clamping device 6 is in the locked state, the pull ring 604 is engaged with the hook 601 and presses the cover plate 2 against the side plate 1. When the locking and clamping device 6 is in the unlocked state, the pull ring 604 is disengaged from the hook 601 and the cover plate 2 can be separated from the side plate 1. By operating the handle 603, the handle 603 is rotated towards or away from the hook 601, which drives the pull ring 604 to move towards or away from the hook 601, thereby releasing or locking the hook 601. This enables quick disassembly or clamping and fixing of the cover plate 2 and the side plate 1, ensuring the sealing performance of the airflow cavity 4 and the ease of maintenance.
[0028] It should be noted that when the handle 603 rotates to the point where the pull ring 604 and the hook 601 are locked together, the handle 603 can remain in that position. This can be achieved by providing a snap-fit structure at the end of the main body 602 away from the hook 601 and at the end of the handle 603 away from the hook 601, or by rotatably connecting the handle 603 and the main body 602 via a damping shaft that provides rotational damping, thus enabling the handle 603 to remain in the set position.
[0029] In some embodiments, the pull ring 604 is rotatably connected to the locking body 602 via a pivot, and the handle 603 is fixed or rigidly connected to the pull ring 604 to drive the pull ring 604 to rotate. In the locked state, operating the handle 603 drives the pull ring 604 to rotate around the locking body 602, so that the pull ring 604 applies a tension force to the hook 601 and presses the cover plate 2 tightly onto the side plate 1. The pull ring 604 forms a self-locking state after rotating to the center position to maintain a stable lock. In the unlocked state, operating the handle 603 in the opposite direction causes the pull ring 604 to rotate in the opposite direction to disengage from the hook 601, thereby releasing the pressure on the cover plate 2 and realizing the quick disassembly of the cover plate 2.
[0030] In some embodiments, the jet outlet 102 corresponds one-to-one with the leakage hole 301, or each leakage hole 301 corresponds to at least one jet outlet 102.
[0031] In some embodiments, the jet outlet 102 is slit-shaped, and multiple jet outlets 102 have the same structure, all being elongated slits. The width of the jet outlet 102 is adapted to the corresponding width of the leakage hole 301, and is greater than or equal to the maximum length of the leakage hole 301 in the width direction of the jet outlet 102, to ensure complete coverage of the leakage hole 301. In an exemplary embodiment, the height of the jet outlet 102 is approximately 4 mm. This structure allows the jet airflow to form a continuous and uniform air curtain, covering the area where the leakage hole 301 is located. The slit-shaped jet outlet 102 forms a continuous air curtain, which can achieve precise blocking of the area where the leakage hole 301 is located, improving the anti-entrapment effect of the residual film 5.
[0032] In some implementations, each jet outlet 102 is directly opposite a leakage hole 301, and there are three leakage holes 301.
[0033] In some embodiments, there are multiple locking devices 6, which are arranged along the outer periphery of the side plate 1.
[0034] In some embodiments, when the side plate 1 is installed on the base plate body 3, it needs to avoid the area where the leakage hole 301 is located. It is installed according to the location of the leakage hole 301. In order to adapt to the area where the leakage hole 301 is located, sufficient space is provided as much as possible in a limited area to form an irregularly distributed closed ring area.
[0035] In some embodiments, the cover plate 2 is a plate-type component adapted to the shape of the opening at the upper end of the airflow cavity 4. Its edge has an annular protrusion with a height of approximately 4 mm and a thickness of approximately 2 mm. The annular protrusion mates with the opening at the end of the airflow cavity 4 furthest from the base plate 3 (and fits against the sidewall of the boss structure at the upper opening of the side plate 1), forming a plug-in sealing structure. The cover plate 2, while sealing the airflow cavity 4, also serves as a component for opening and cleaning the airflow cavity 4.
[0036] In some embodiments, the sealing strip 7 is an irregular annular structure that matches the internal contour of the cover plate 2. It is disposed inside the cover plate 2 and presses against the side wall of the airflow cavity 4 through the annular protrusions on the edge of the cover plate 2, thus pressing the sealing strip 7 between the cover plate 2 and the upper opening of the side plate 1, thereby forming a sealed interface to prevent airflow leakage and improve airflow utilization efficiency. Through the combined design of the cover plate 2, sealing strip 7, and locking device 6, the airtightness of the airflow cavity 4 is ensured while enabling rapid opening and dust removal maintenance, improving the practicality and operational stability of the device.
[0037] In some embodiments, the sealing strip 7 is an irregular annular sealing element with a rectangular cross-section and a thickness adapted to the contact surface of the cover plate 2 and the side plate 1, and it is in close contact with them during assembly to achieve sealing of the cavity.
[0038] In some embodiments, the side plate 1 is welded to the base plate body 3. This structure requires no additional assembly and forms a strong integral connection with the base plate, combining good structural strength and sealing performance.
[0039] In some embodiments, the air inlet 101 is located in the non-interference area of the side plate 1. The air inlet 101 is a through hole on the side plate 1, and a circular pipe interface is fixedly connected to the through hole for connecting to the fan 10 pipeline of the cotton harvester, thereby providing a stable air source for the airflow cavity 4.
[0040] The working principle of this embodiment is as follows: When the cotton harvester is operating, the airflow generated by the fan 10 enters the integrated airflow cavity 4 inside the base plate body 3 through the air inlet 101. After the airflow is distributed in the cavity, it is simultaneously ejected through the jet outlet 102, forming a continuous air curtain wall below the area where the leakage hole 301 of the picking head 200 is located. This air curtain wall forms an airflow barrier against the residual film 5 on the ground, preventing the residual film 5 from being sucked in by the negative pressure of the picking head 200. The cotton is above the airflow barrier structure and is not affected by the airflow, thereby ensuring that the picking operation can proceed normally.
[0041] After prolonged use, dust or impurities may accumulate inside the airflow cavity 4. At this time, the cover plate 2 can be opened by operating the locking and clamping device 6 to clean the inside of the airflow cavity 4. After cleaning, the cover plate 2 can be tightened again to restore the sealing state of the device and continue to work normally without the need to disassemble the entire base plate structure.
[0042] Example 2 This embodiment provides a harvesting head 200, including a harvesting body and an air curtain-type residual film blocking device 100 as described in Embodiment 1. The bottom of the harvesting body has a base plate body 3, and the base plate body 3 is provided with at least one leakage hole 301. The side plate 1 is fixedly connected to the base plate body 3 at one end away from the cover plate 2.
[0043] In some embodiments, there are multiple leakage holes 301, and the airflow cavity 4 is disposed between all the leakage holes 301.
[0044] In some embodiments, the base plate body 3 is a supporting body 602 adapted to the bottom structure of the picking head 200 of the cotton harvester, made of wear-resistant metal material, and detachably connected to the picking head 200 by bolts or buckles.
[0045] In some embodiments, the system also includes a conveying channel 8, an air duct 9, and a fan 10 disposed on the picking head 200. The conveying channel 8 is used to convey the processed seed cotton inside the picking head 200 outward. One end of the air duct 9 is connected to the fan 10, and the other end of the air duct 9 is connected to the airflow cavity 4.
[0046] Example 3 This embodiment provides a cotton harvester, including a frame, a picking head 200, and an air curtain-type residual film blocking device 100 as described in Embodiment 1. The bottom of the picking body has a base plate body 3, and the base plate body 3 is provided with at least one leakage hole 301. The end of the side plate 1 away from the cover plate 2 is fixedly connected to the base plate body 3. The picking head 200 is set on the frame.
[0047] This embodiment can be adapted to the picking head 200 of a conventional self-propelled cotton harvester (which adopts a self-propelled horizontal picking method). The device is an integrated modification structure of the original bottom plate of the picking head 200 of the cotton harvester. The assembly method is the same as that of the original bottom plate. Only the cotton harvester needs to provide an air source for the air inlet 101.
[0048] This invention provides an integrated air curtain residual film 5 blocking device for the bottom plate of the picking head 200 of a cotton harvester. This device has a high degree of structural integration, reducing installation steps and improving assembly efficiency. It forms a stable air curtain in the area where the leakage holes 301 of the picking head 200 are located, effectively blocking the residual film 5 on the ground surface, while also providing convenient dust removal. Addressing the structural characteristic of the bottom plate body 3 of the picking head 200 having multiple leakage holes 301 that cannot be sealed, this device constructs an internal airflow cavity 4 on the original bottom plate to form a directional jet air curtain. Without altering the original structure and operating method of the picking head 200, it effectively blocks the residual film 5 on the ground surface, while simplifying the installation process and improving maintenance convenience.
[0049] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.
Claims
1. A gas curtain-type residual film barrier device, characterized in that, The device includes a side plate and a cover plate. Both ends of the side plate have openings. The cover plate is connected to one end of the side plate, and the other end of the side plate is fixed and sealed to the base plate of the harvesting head. The cover plate can seal the opening at the end of the side plate away from the base plate or open the opening at the end of the side plate away from the base plate. The cover plate, the side plate, and the base plate can form an airflow cavity. The side plate has an air inlet and at least one jet outlet, both of which are connected to the airflow cavity. Gas within the airflow cavity, after being ejected through the jet outlet, can form an air curtain at the leakage hole of the base plate, preventing residual film from being drawn into the harvesting head through the leakage hole under the negative pressure of the harvesting head.
2. The air curtain type residual film barrier device according to claim 1, characterized in that, It also includes at least one locking device, which is connected to both the side plate and the cover plate. The locking device has a locked state and an unlocked state. When the locking device is in the locked state, the cover plate is pressed against the side plate. When the locking device is in the unlocked state, the cover plate can be separated from the side plate.
3. The air curtain type residual film barrier device according to claim 2, characterized in that, It also includes a sealing strip disposed between the cover plate and the side plate near the opening of the cover plate.
4. The air curtain type residual film barrier device according to claim 2, characterized in that, The locking and clamping device includes a hook, a main body, a handle, and a pull ring. The handle is rotatably connected to the main body so that the end of the handle away from the hook can approach or move away from the hook. The pull ring is connected to the main body, the hook is fixedly connected to the cover plate, and the main body is fixedly connected to the side plate. When the locking and clamping device is in the locked state, the pull ring is engaged with the hook and presses the cover plate against the side plate. When the locking and clamping device is in the unlocked state, the pull ring disengages from the hook and allows the cover plate to separate from the side plate.
5. The air curtain type residual film barrier device according to claim 1, characterized in that, The jet outlet corresponds one-to-one with the leakage hole, or each leakage hole corresponds to at least one jet outlet.
6. The air curtain type residual film barrier device according to claim 1, characterized in that, The jet outlet is slit-shaped.
7. The air curtain type residual film barrier device according to claim 2, characterized in that, There are multiple locking devices, and the multiple locking devices are arranged along the outer periphery of the side plate.
8. A harvesting head, characterized in that, The invention includes a harvesting body and an air curtain-type residual film blocking device as described in any one of claims 1 to 7. The bottom of the harvesting body has the bottom plate body, and the bottom plate body is provided with at least one of the leakage holes. The side plate is fixedly connected to the bottom plate body at one end away from the cover plate.
9. The harvesting head according to claim 8, characterized in that, There are multiple leakage holes, and the airflow cavity is disposed between all the leakage holes.
10. A cotton harvester, characterized in that, The device includes a frame, a picking head, and an air curtain-type residual film blocking device as described in any one of claims 1 to 7. The bottom of the picking body has the bottom plate body, and the bottom plate body is provided with at least one of the leakage holes. The end of the side plate away from the cover plate is fixedly connected to the bottom plate body. The picking head is disposed on the frame.