A well cellar forming device for flue-cured tobacco well cellar cultivation

Abstract

The utility model belongs to the tool technical field of flue -cured tobacco well cellar cultivation method, concretely relates to a well cellar forming equipment for flue -cured tobacco well cellar cultivation. The utility model provides a well cellar forming equipment for flue -cured tobacco well cellar cultivation, aims at solving the problem of big labour intensity of operating personnel when using the flue -cured tobacco well cellar forming tool in prior art. A well cellar forming equipment for flue -cured tobacco well cellar cultivation, including frame, be provided with wheel on the frame, still be provided with water tank and be used to form the forming assembly of well cellar on the tobacco ridge on the frame, the utility model discloses drive assembly is set up, drive assembly drives the slide of standpipe along vertical direction, and then drives the forming head to insert the tobacco ridge and forms the well cellar, and the labour intensity of operating personnel is greatly reduced. Through setting up water tank, the water in water tank enters the inner chamber of forming head through guide hole, standpipe, and then is discharged into the well cellar of forming through the drainage hole that is evenly distributed on the forming head.

Description

Technical Field

[0001] This utility model belongs to the technical field of tools for flue-cured tobacco well-cellar cultivation, specifically relating to a well-cellar forming device for flue-cured tobacco well-cellar cultivation. Background Technology

[0002] Well-cellar transplanting is an important method for flue-cured tobacco cultivation, widely accepted by tobacco farmers and extensively promoted and applied throughout the country. Well-cellar transplanting involves constructing wells (6-8cm in diameter and 15-18cm deep) on the tobacco ridges, vertically placing appropriately sized tobacco seedlings into the wells, applying water and fertilizer, and then covering and securing the seedling roots with a suitable amount of soil. This field transplanting technique, combined with deep planting of small seedlings, reduces seedling time, better creates suitable soil temperature and a suitable environment for seedling growth, and mitigates the adverse effects of low temperatures and drought on tobacco transplanting, ensuring timely early planting and promoting early and rapid seedling development.

[0003] In existing technologies, the tools for making tobacco curing pits typically include a hand-held rod and a forming head located at the lower end of the hand-held rod. The pit is formed by inserting the forming head into the tobacco ridge and then pulling it out. This forming tool requires the user to manually partially untangle the forming head and insert it into the tobacco ridge, which is laborious and results in high labor intensity for the workers. Utility Model Content

[0004] This utility model provides a well-cellar forming device for flue-cured tobacco cultivation, aiming to solve the problem of high labor intensity for operators when using existing flue-cured tobacco well-cellar forming tools.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] A well-cellar forming device for flue-cured tobacco cultivation includes a frame with wheels on it, a water tank and forming components for forming wells on tobacco ridges.

[0007] The forming assembly includes a vertical tube slidably connected to the frame in a vertical direction. A forming head is provided at the lower end of the vertical tube. An inner cavity is provided inside the forming head and communicates with the vertical tube. A drainage hole is also provided on the forming head and communicates with the inner cavity. The drainage holes are evenly distributed on the forming head. A guide hole is provided on the water tank to guide the water in the water tank to the vertical tube. The guide hole communicates with the vertical tube. The water in the water tank enters the inner cavity through the guide hole and the vertical tube. The water in the inner cavity is discharged into the well formed by the forming head through the drainage hole.

[0008] The frame is also equipped with a drive assembly that drives the vertical tube to slide in the vertical direction.

[0009] A further improved solution: The drive assembly includes a handle rotatably connected to the frame, a crossbar is provided on the vertical tube, and a strip groove is provided on the handle for the crossbar to pass through. The crossbar has a circular cross-sectional shape, and the crossbar contacts the side wall of the strip groove to convert the swinging motion of the handle into the vertical movement of the vertical tube.

[0010] Based on the above technical solution: a handle rotatably connected to the frame is used to drive the vertical pipe movement by swinging the handle. Compared to the traditional method of directly inserting the forming head into the tobacco ridge with force, the operator only needs to swing the handle to complete the insertion action of the forming head in the well construction, greatly reducing the difficulty of operation and making the operation simpler and less strenuous, especially suitable for long-term continuous operation, effectively reducing operator fatigue. A crossbar on the vertical pipe passes through the strip groove on the handle, and the crossbar has a circular cross-section and contacts the side wall of the strip groove. This design can accurately convert the swinging motion of the handle into the vertical movement of the vertical pipe, ensuring the accuracy and stability of motion transmission, so that the forming head can be inserted into the tobacco ridge according to the predetermined trajectory and depth, thereby producing wells that meet the requirements and improving the quality and consistency of the wells. The drive component has a relatively simple structure, mainly composed of a handle, a crossbar, and a strip groove, without complex mechanical structures and transmission components. The simple structure means fewer failure points and lower maintenance costs, while also ensuring reliable operation in various working environments, improving the overall reliability and durability of the equipment.

[0011] A further improved solution: The frame is also equipped with a column, one end of the handle is rotatably connected to the column, the handle is rotatably connected to the column via a pivot, and the column is fixed to the frame with screws.

[0012] Based on the above technical solution: a column is installed on the frame, and one end of the handle is rotatably connected to the column via a pivot. The column provides a stable support point for the handle, allowing it to swing flexibly around the pivot. This design ensures the stability of the handle during swinging, preventing wobbling or deviation, thus ensuring that the drive assembly accurately transmits the swinging motion of the handle to the vertical tube, enabling the vertical tube to move vertically in a predetermined direction and trajectory, thereby ensuring that the forming head can be accurately inserted into the tobacco ridge to form the well. The column is fixed to the frame with screws, which has significant advantages. On the one hand, during equipment assembly, using screws allows for convenient and quick installation of the column onto the frame, improving assembly efficiency; on the other hand, when the equipment malfunctions or requires maintenance, the column can be easily removed from the frame by unscrewing the screws, facilitating inspection, repair, and replacement of the drive assembly and other related components, reducing maintenance costs and difficulty.

[0013] A further improved solution: The drive assembly further includes a vertical plate disposed on the frame, a horizontal plate disposed at the upper end of the vertical plate, the vertical tube being located below the horizontal plate, and an elastic element being disposed between the horizontal plate and the vertical tube to pull the vertical tube upward.

[0014] Based on the above technical solution: the elastic element installed between the horizontal plate and the vertical pipe can pull the vertical pipe upward. After one well-pit construction is completed, i.e., the forming head is inserted into the tobacco ridge and pulled out, the pulling force of the elastic element will cause the vertical pipe to automatically return to its original position. In this way, the operator does not need to manually lift the vertical pipe back to its initial position, reducing the number of operation steps, greatly improving the continuity and efficiency of the operation, and allowing the equipment to quickly enter the next well-pit construction process. The automatic upward return of the vertical pipe by the elastic element reduces the operator's burden of lifting the vertical pipe after the well-pit construction is completed. During the entire well-pit construction process, the operator only needs to focus on swinging the handle to move the vertical pipe downward, while the upward return of the vertical pipe is completed by the elastic element, further reducing labor intensity and making the operation easier and more convenient.

[0015] A further improved solution: The elastic element is a spring, one end of which is fixed to the horizontal plate, and the other end of which is fixed to the vertical tube.

[0016] Based on the above technical solution: Springs possess excellent elastic properties. Fixing one end to the horizontal plate and the other end to the vertical pipe provides a stable and reliable upward pulling force to the vertical pipe. After the forming head completes insertion into the tobacco ridge and is pulled out, the spring's elasticity can quickly and effectively pull the vertical pipe back to its initial position, ensuring the equipment can quickly enter the next work cycle, greatly improving the continuity and efficiency of the well-forming operation. Springs are common and low-cost mechanical parts, widely used in various mechanical equipment. Using springs as elastic components not only reduces the manufacturing cost of the equipment but also makes replacement very convenient when the spring is damaged or its elasticity diminishes, resulting in relatively low maintenance costs. This helps improve the economy and practicality of the equipment, making it more suitable for large-scale promotion and use in agricultural production.

[0017] A further improved solution: the horizontal plate is perpendicular to the vertical plate, and the horizontal plate and the vertical plate are an integral structure, with the vertical plate fixed to the frame by screws.

[0018] Based on the above technical solution: the horizontal plate and vertical plate are perpendicular and form an integrated structure, ensuring a very tight and secure connection between them. During equipment operation, when the drive assembly moves the vertical tube up and down, the horizontal and vertical plates, as a whole, can better bear and distribute the generated stress, avoiding potential shaking or deformation due to weak connections. This ensures the stability of the entire drive assembly structure and provides reliable support for the stable movement of the vertical tube. The integrated horizontal and vertical plates can be integrally molded during manufacturing, reducing the number of parts and assembly steps, improving production efficiency, and also reducing potential errors caused by assembling multiple parts, ensuring consistent product quality. During installation, the vertical plate is simply fixed to the frame with screws, making operation simple and convenient, saving installation time and labor costs. Because the horizontal and vertical plates are integrated, the force generated by the handle's swing and the spring force can be transmitted more directly and efficiently between the two during equipment operation. Force is not lost due to loosening or gaps in the connection, allowing the vertical tube to respond more accurately to the action of the drive component, converting the swing motion of the handle and the elastic force of the spring into stable vertical motion, thereby ensuring that the forming head can be accurately inserted into and pulled out of the tobacco ridge, improving the quality and precision of the well and cellar forming.

[0019] A further improved solution: the two ends of the crossbar protrude from the vertical tube respectively, the handle is provided with a clearance groove to prevent the handle from interfering with the vertical tube, the clearance groove passes through the handle, and the parts of the handle located on both sides of the vertical tube are provided with strip grooves for the crossbar to pass through.

[0020] Based on the above technical solution: the crossbar protrudes from both ends of the vertical tube, and the handle is equipped with a through-hole relief groove. Simultaneously, the parts of the handle located on both sides of the vertical tube have strip grooves through which the crossbar passes. This design allows the handle to cleverly avoid potential interference from the vertical tube during swinging. When the handle swings, the relief groove provides ample space for the relative movement between the vertical tube and the handle, while the strip grooves ensure the crossbar can move stably within them. This coordinates the swinging motion of the handle and the vertical movement of the vertical tube, ensuring smooth and stable operation of the drive assembly and improving the efficiency and accuracy of the well-pit forming operation. The crossbar passes through the strip grooves on both sides of the handle; this symmetrical layout makes the force exerted by the handle on the vertical tube more even. When driving the vertical tube up and down, the strip grooves on both sides simultaneously constrain and guide the crossbar, preventing the vertical tube from tilting or swaying due to uneven force. This enhances the structural stability of the entire drive assembly, ensuring that the forming head can be vertically and stably inserted into and removed from the tobacco ridge, producing a higher quality well-pit. The clearance groove effectively prevents the handle from colliding with the vertical tube during movement, reducing potential component damage and safety hazards caused by collisions. During equipment operation, operators do not need to worry about unexpected situations arising from interference between the handle and the vertical tube, allowing for safer operation and improved safety and reliability.

[0021] A further improved solution: The vertical pipe is provided with a through hole to allow water in the vertical pipe to enter the inner cavity, and a control plate for closing the through hole is also provided inside the vertical pipe. The control plate is fixed to the horizontal plate by a flexible wire.

[0022] Based on the above technical solution: A through-hole is provided on the vertical pipe, allowing water to enter the inner cavity, while the control plate precisely controls the flow of water. When water needs to be injected into the inner cavity, the control plate is operated to open the through-hole, allowing water to flow smoothly into the cavity; when water injection is not needed, the control plate closes the through-hole, preventing water from entering. This precise control method allows for flexible adjustment of the water volume in the inner cavity according to actual operational needs, meeting the water requirements of different soil conditions and well / cellar construction requirements. The control plate is fixed to the horizontal plate with flexible wires, making its operation simple and convenient.

[0023] A further improved solution: The lower end of the flexible wire is fixed to the control plate, and the upper end of the flexible wire is fixed to the horizontal plate. When the vertical tube moves downward, the flexible wire pulls the control plate to open the through hole, allowing water in the vertical tube to enter the inner cavity. When the vertical tube moves upward, the water in the vertical tube pushes the control plate to close the through hole.

[0024] Based on the above technical solution: When the vertical pipe moves downward, the flexible wire generates tension due to the vertical pipe's displacement, precisely pulling the control plate to open the through hole, allowing water inside the vertical pipe to flow into the inner cavity quickly and accurately with the help of gravity. When the vertical pipe moves upward, the water pressure in the inner cavity or the water's own gravity pushes the control plate to close the through hole, effectively preventing water backflow or leakage. This method of automatically switching the water flow state according to the direction of the vertical pipe's movement greatly improves the accuracy and efficiency of water injection, and can precisely control the amount of water in the inner cavity according to actual operational needs. Water injection during the downward movement of the vertical pipe is synchronized with the insertion of the forming head into the tobacco ridge during the construction of the well. At this time, water injection allows water to fully penetrate into the soil around the tobacco ridge, increasing soil moisture, improving soil structure, creating a good environment for the growth of tobacco seedling roots, which is conducive to the absorption of water and nutrients by the tobacco seedlings, promoting healthy growth of tobacco seedlings, and improving the yield and quality of tobacco leaves. Closing the through hole when the vertical pipe moves upward prevents excessive water loss and maintains suitable soil moisture. The flexibility of the flexible wire allows it to adapt to the slight swaying and displacement during the movement of the vertical pipe, ensuring stable coordination between the control plate and the vertical pipe's movement. Regardless of changes in the speed and force of the vertical pipe movement, the flexible wire can accurately transmit tension or withstand water pressure, ensuring the stable opening and closing of the control board's through holes. This avoids abnormal opening and closing of the through holes due to mechanical vibration or unstable movement, ensuring the overall stable and reliable operation of the equipment and reducing the occurrence of malfunctions.

[0025] A further improved solution: The frame is provided with an assembly hole through which the vertical tube passes, and the frame is also provided with a guide cylinder for guiding the vertical tube. The guide cylinder and the frame are an integral structure. The guide cylinder and the assembly hole are coaxially arranged, and the guide cylinder communicates with the assembly hole.

[0026] Based on the above technical solution: the guide cylinder and frame are an integrated structure and coaxially connected with the assembly holes, providing an extremely precise movement track for the vertical pipe. During equipment operation, when the vertical pipe moves up and down, the guide cylinder ensures that the vertical pipe always moves along the predetermined axis, preventing deviation, swaying, or tilting during movement. The integrated structure of the guide cylinder and frame ensures a very strong connection between them, eliminating the possibility of loosening or gaps from additional connecting parts. This integral structure can better withstand various forces generated during the movement of the vertical pipe, such as friction and impact. During frequent up and down movements of the vertical pipe, the integrated structure can effectively disperse and transmit these forces, preventing deformation or damage to the frame or guide cylinder due to excessive local stress, thereby enhancing the structural stability and durability of the entire equipment and extending its service life. Because the guide cylinder and frame are integrated, there is no need to install the guide cylinder separately during equipment assembly, reducing assembly steps and the number of parts, lowering assembly difficulty and error rate. At the same time, during equipment maintenance, there is no need to separately inspect and repair the connection between the guide tube and the frame, which simplifies the maintenance process and saves maintenance time and costs.

[0027] The beneficial effects of this utility model are as follows:

[0028] This invention, by setting up a driving component, drives the vertical pipe to slide in the vertical direction, thereby driving the forming head to insert into the tobacco ridge to form a well, which greatly reduces the labor intensity of the workers.

[0029] By setting up a water tank, water from the tank enters the inner cavity of the forming head through guide holes and vertical pipes, and then drains into the formed well pit through drainage holes evenly distributed on the forming head. In this way, water can be directly introduced into the well pit while it is being formed, realizing the simultaneous construction of the well pit and watering, which facilitates the subsequent planting of tobacco seedlings and fertilization, and is beneficial to the growth of the tobacco seedlings.

[0030] Because the equipment is mechanized, the drive components can quickly and stably drive the vertical pipe and forming head to move. Compared with manual operation, the construction of the well cellar can be completed in a shorter time, which improves the efficiency of flue-cured tobacco well cellar cultivation. Attached Figure Description

[0031] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For users of ordinary skills in the art, other related drawings can be obtained from these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of a well-cellar forming device for flue-cured tobacco cultivation according to this utility model.

[0033] Figure 2 This is a front view of a well-cellar forming device for flue-cured tobacco cultivation according to this utility model.

[0034] Figure 3 This is a schematic diagram of the internal structure of a well-cellar forming device for flue-cured tobacco cultivation, which is a utility model.

[0035] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0036] Explanation of the labels in the diagram:

[0037] 1-Frame; 2-Wheel; 3-Vertical tube; 4-Forming head; 5-Inner cavity; 6-Drainage hole; 7-Guide hole; 8-Handle; 9-Horizontal bar; 10-Strip groove; 11-Column; 12-Shaft; 13-Upright plate; 14-Horizontal plate; 15-Elastic element; 16-Control panel; 17-Flexible wire; 18-Guide cylinder; 19-Water tank. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. It should be understood that the specific embodiments described herein are merely for explaining the present utility model and are not intended to limit the present utility model. All other embodiments obtained by users of the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0039] refer to Figures 1 to 4 A well-cellar forming device for flue-cured tobacco cultivation includes a frame 1, on which wheels 2 are provided, and a water tank 19 and forming components for forming wells on tobacco ridges are also provided on the frame 1.

[0040] The molding assembly includes a vertical tube 3 slidably connected to the frame 1 in a vertical direction. A molding head 4 is provided at the lower end of the vertical tube 3. An inner cavity 5 is provided inside the molding head 4 and communicates with the vertical tube 3. A drain hole 6 is also provided on the molding head 4 and communicates with the inner cavity 5. The drain holes 6 are evenly distributed on the molding head 4. A guide hole 7 is provided on the water tank to guide the water in the water tank to the vertical tube 3. The guide hole 7 communicates with the vertical tube 3. The water in the water tank enters the inner cavity 5 through the guide hole 7 and the vertical tube 3. The water in the inner cavity 5 is discharged into the well formed by the molding head 4 through the drain hole 6.

[0041] The frame 1 is also equipped with a drive assembly that drives the vertical tube 3 to slide in the vertical direction.

[0042] Specifically: The drive assembly includes a handle 8 rotatably connected to the frame 1, a crossbar 9 on the vertical tube 3, and a slot 10 on the handle 8 through which the crossbar 9 passes. The crossbar 9 has a circular cross-section. The crossbar 9 contacts the side wall of the slot 10, converting the swinging motion of the handle 8 into vertical movement of the vertical tube 3. A column 11 is also provided on the frame 1. One end of the handle 8 is rotatably connected to the column 11. The handle 8 is rotatably connected to the column 11 via a pivot 12. The column 11 is fixed to the frame 1 with screws. The drive assembly also includes a vertical plate 13 on the frame 1. A crossbar 14 is provided at the upper end of the vertical plate 13. The vertical tube 3 is located below the crossbar 14. An elastic element 15 is provided between the crossbar 14 and the vertical tube 3 to pull the vertical tube 3 upward. The elastic element 15 is a spring, one end of which is fixed to the horizontal plate 14, and the other end of which is fixed to the vertical tube 3.

[0043] Wherein: the horizontal plate 14 is perpendicular to the vertical plate 13, and the horizontal plate 14 and the vertical plate 13 are an integral structure, the vertical plate 13 is fixed to the frame 1 by screws. The two ends of the crossbar 9 protrude from the vertical tube 3 respectively, and the handle 8 is provided with a relief groove to prevent the handle 8 from interfering with the vertical tube 3. The relief groove passes through the handle 8, and the parts of the handle 8 located on both sides of the vertical tube 3 are provided with strip grooves 10 for the crossbar 9 to pass through. The crossbar 9 contacts the side wall of the strip groove 10. When the handle 8 is rotated, the side wall of the strip groove 10 applies a force to the crossbar 9. Since the cross-sectional shape of the crossbar 9 is circular, the force applied by the side wall of the strip groove 10 is divided into two components, one of which drives the vertical tube 3 to move up and down.

[0044] Specifically: The vertical pipe 3 is provided with a through hole for water to enter the inner cavity 5. A control plate 16 for closing the through hole is also provided inside the vertical pipe 3. The control plate 16 is fixed to the horizontal plate 14 by a flexible wire 17. The lower end of the flexible wire 17 is fixed to the control plate 16, and the upper end of the flexible wire 17 is fixed to the horizontal plate 14. When the vertical pipe 3 moves downward, the flexible wire 17 pulls the control plate 16 to open the through hole, allowing water in the vertical pipe 3 to enter the inner cavity 5. When the vertical pipe 3 moves upward, the water in the vertical pipe 3 pushes the control plate 16 to close the through hole. The frame 1 is provided with an assembly hole through which the vertical tube 3 passes. The frame 1 is also provided with a guide cylinder 18 for guiding the vertical tube 3. The guide cylinder 18 is an integral structure with the frame 1, coaxially arranged with the assembly hole, and communicating with the assembly hole. A notch may be provided on the guide cylinder 18 to prevent interference between the crossbar 9 and the guide cylinder 18, allowing the guide cylinder 18 to be of a longer length.

[0045] The working principle of this embodiment:

[0046] The frame 1 is equipped with wheels 2, which allow the equipment to move easily between tobacco rows, facilitating the construction of chimneys in different locations. The vertical tube 3 in the forming assembly is slidably connected to the frame 1 along the vertical direction, and a forming head 4 is located at the lower end of the vertical tube 3. The drive assembly drives the vertical tube 3 to slide downwards vertically, causing the forming head 4 to insert into the tobacco row. Once the forming head 4 reaches a certain depth, it is pulled out, thus forming a chimney on the tobacco row with a diameter of 6cm to 8cm and a depth of 15cm to 18cm. The forming head 4 has an inner cavity 5, which communicates with the vertical tube 3. Drainage holes 6 are evenly distributed on the forming head 4, also communicating with the inner cavity 5. A guide hole 7 is provided on the water tank, communicating with the vertical tube 3. Under the influence of gravity, the water in the tank enters the vertical pipe 3 through the guide hole 7, then flows into the inner cavity 5 of the forming head 4, and finally drains into the formed well through the drain hole 6, thus realizing the application of water into the well while it is being made.

[0047] This utility model is not limited to the above-mentioned optional embodiments. Under the premise of non-contradiction, the various solutions can be combined arbitrarily. Anyone can derive other forms of products under the guidance of this utility model. However, no matter what changes are made in their shape or structure, all technical solutions that fall within the scope of the claims of this utility model are within the protection scope of this utility model.

Claims

1. A well-cellar forming device for flue-cured tobacco cultivation, characterized in that: It includes a frame, on which wheels are mounted, and a water tank and a molding assembly for forming wells on the tobacco ridges; The forming assembly includes a vertical tube slidably connected to the frame in a vertical direction. A forming head is provided at the lower end of the vertical tube. An inner cavity is provided inside the forming head and communicates with the vertical tube. A drainage hole is also provided on the forming head and communicates with the inner cavity. The drainage holes are evenly distributed on the forming head. A guide hole is provided on the water tank to guide the water in the water tank to the vertical tube. The guide hole communicates with the vertical tube. The water in the water tank enters the inner cavity through the guide hole and the vertical tube. The water in the inner cavity is discharged into the well formed by the forming head through the drainage hole. The frame is also equipped with a drive assembly that drives the vertical tube to slide in the vertical direction.

2. A pit forming apparatus for flue-cured tobacco pit cultivation according to claim 1, characterized in that: The drive assembly includes a handle rotatably connected to the frame, a crossbar on the vertical tube, a slot on the handle through which the crossbar passes, the crossbar having a circular cross-section, and the crossbar contacting the side wall of the slot converting the swing motion of the handle into the vertical motion of the vertical tube.

3. A pit forming apparatus for flue-cured tobacco pit cultivation according to claim 2, characterized in that: The frame is also equipped with a column, one end of the handle is rotatably connected to the column, the handle is rotatably connected to the column via a pivot, and the column is fixed to the frame with screws.

4. A pit forming apparatus for flue-cured tobacco pit cultivation according to claim 3, characterized in that: The drive assembly also includes a vertical plate disposed on the frame, a horizontal plate disposed at the upper end of the vertical plate, the vertical tube being located below the horizontal plate, and an elastic element being disposed between the horizontal plate and the vertical tube to pull the vertical tube upward.

5. A pit forming apparatus for flue-cured tobacco pit culture according to claim 4, characterized in that: The elastic element is a spring, one end of which is fixed to the horizontal plate and the other end of which is fixed to the vertical tube.

6. A pit forming apparatus for flue-cured tobacco pit culture according to claim 5, characterized in that: The horizontal plate is perpendicular to the vertical plate, and the horizontal plate and the vertical plate are an integral structure. The vertical plate is fixed to the frame with screws.

7. A well-cellar forming device for flue-cured tobacco cultivation according to claim 6, characterized in that: The two ends of the crossbar protrude from the vertical tube respectively. The handle is provided with a clearance groove to prevent the handle from interfering with the vertical tube. The clearance groove passes through the handle. The parts of the handle located on both sides of the vertical tube are provided with strip grooves for the crossbar to pass through.

8. A pit forming apparatus for flue-cured tobacco pit cultivation according to claim 4, characterized in that: The vertical pipe is provided with a through hole that allows water from the vertical pipe to enter the inner cavity. The vertical pipe is also provided with a control plate that closes the through hole. The control plate is fixed to the horizontal plate by a flexible wire.

9. A pit forming apparatus for flue-cured tobacco pit culture according to claim 8, characterized in that: The lower end of the flexible wire is fixed to the control plate, and the upper end of the flexible wire is fixed to the horizontal plate. When the vertical tube moves downward, the flexible wire pulls the control plate to open the through hole, and the water in the vertical tube enters the inner cavity. When the vertical tube moves upward, the water in the vertical tube pushes the control plate to close the through hole.

10. A pit forming apparatus for flue-cured tobacco pit cultivation according to claim 1, characterized in that: The frame is provided with an assembly hole for the vertical tube to pass through, and the frame is also provided with a guide cylinder for guiding the vertical tube. The guide cylinder and the frame are an integral structure. The guide cylinder and the assembly hole are coaxially arranged and communicate with each other.

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