Forestry engineering sapling storage device capable of improving survival rate

Abstract

The forestry engineering sapling storage device capable of improving the survival rate comprises a box body, a bearing frame used for bearing saplings is installed in the box body, and an air control structure used for adjusting the air inlet amount according to the temperature and humidity in the box body is arranged at the position, located above the bearing frame, of one side of the box body; the top of the box body is provided with a water dripping structure used for watering. According to the forestry engineering sapling storage device capable of improving the survival rate, the problems of sapling growth blocking, disease breeding and the like caused by uncomfortable environment are effectively solved, the sapling survival rate is remarkably improved, the device has great significance in sapling cultivation, transportation and storage in forestry engineering, frequent manual intervention is not needed in the working process of the whole device, and the working efficiency is improved. The functions of automatic temperature regulation, ventilation, watering and the like are realized, and the labor intensity of workers is reduced.

Description

Technical Field

[0001] This invention relates to the field of forestry engineering equipment technology, specifically to a seedling storage device for forestry engineering that can improve the survival rate. Background Technology

[0002] In forestry engineering, the storage and transportation of seedlings are crucial to ensuring their healthy growth; however, traditional seedling storage devices have many significant shortcomings in practical applications and are difficult to meet the growth needs of seedlings.

[0003] For example, traditional devices generally lack effective temperature and humidity regulation, leading to excessively high temperatures or humidity within the storage chamber. This severely impacts the healthy growth of seedlings. Watering during the hottest part of the day causes a sharp drop in soil temperature and reduces soil aeration. Furthermore, water droplets under direct sunlight can focus sunlight, scorching leaves and further damaging the seedlings. In addition, insufficient root aeration in traditional devices easily leads to root rot due to oxygen deficiency, affecting seedling survival rates. Moreover, traditional devices largely rely on manual management, which is not only costly and labor-intensive but also susceptible to human error affecting the seedling's growth environment. These problems make traditional seedling storage devices unable to meet the high requirements for seedling survival rates and growth quality in forestry projects.

[0004] To address the aforementioned issues, there is an urgent need for innovative designs based on existing seedling storage devices. Summary of the Invention

[0005] The present invention addresses the problem that existing technical solutions are too simplistic by providing a forestry engineering seedling storage device that significantly improves survival rates, thus resolving the issues raised in the background section.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a seedling storage device for forestry engineering that can improve the survival rate, comprising a box body, wherein a support frame for supporting seedlings is installed inside the box body, and an air control structure for adjusting the air intake according to the temperature and humidity inside the box body is provided on one side of the box body above the support frame. A drip structure for watering is installed on the top of the box body, and the drip structure is linked with the air control structure. An air limiting structure linked with the air control structure and the drip structure is provided on the other side of the box body above the support frame to restrict the air outflow from the box body. An air inlet is provided on the outer wall of the box body above the support frame, and an air outlet is provided on the outer wall of the box body below the support frame.

[0007] Preferably, the support frame is provided with several hemispherical areas at equal intervals for supporting the roots of the seedlings, and the hemispherical areas are provided with several holes to facilitate root ventilation and prevent root rot.

[0008] Preferably, the air control structure includes an air supply device, an air outlet, a T-shaped cylinder, a heat-conducting piston rod, a sealing frame, a shape memory alloy spring, and a first horizontal piston rod. The air supply device is installed on one side of the outer wall of the housing, and at least three air outlets communicating with the air supply device are opened on this side of the outer wall of the housing. A T-shaped cylinder is connected to the top of the inner wall of this side of the housing, and a heat-conducting piston rod is slidably connected to the lower end of the T-shaped cylinder. A sealing frame for blocking the air outlet is connected to the lower end of the heat-conducting piston rod. A shape memory alloy spring is connected between the sealing frame and the T-shaped cylinder, and a first horizontal piston rod is slidably connected to the inner end of the T-shaped cylinder near the center of the housing.

[0009] The sealing frame is configured with an "L" shape and is equipped with a sponge material for absorbing moisture from the air.

[0010] Preferably, the dripping structure includes a water tank, a piston plate, a liquid flow channel, and an opening plate. The water tank is installed on the top of the tank, and the piston plate is installed inside the water tank. The end of the piston plate passes through the top of the water tank and is connected to a counterweight for applying a constant downward pressure. Several liquid flow channels are symmetrically arranged between the bottom of the water tank and the top of the tank about the upper hemispherical area of ​​the support frame. An opening plate is provided at the top of the tank to block the liquid flow channels. The opening plate has an opening for aligning the liquid flow channels to facilitate dripping irrigation. One side of the bottom of the opening plate is connected to the first horizontal piston rod.

[0011] Preferably, the flow-limiting structure includes an L-shaped cylinder, a second horizontal piston rod, a vertical piston rod, a first transfer port, a second transfer port, and a U-shaped hose. An L-shaped cylinder is provided on the other side of the top of the box, and a second horizontal piston rod is slidably connected to one end of the L-shaped cylinder near the center of the box. The end of the second horizontal piston rod is connected to the other side of the bottom of the opening plate. A vertical piston rod is slidably connected to the lower end of the L-shaped cylinder, and the vertical piston rod is used to block part of the first transfer port. The outer wall of the box has a first transfer port and a second transfer port on the upper and lower sides of the support frame, respectively, and a U-shaped hose is connected between the first transfer port and the second transfer port.

[0012] Preferably, the limiting structure includes a bidirectional threaded rod, a chain, a first sliding sleeve, a second sliding sleeve, and a pressure plate. The inner wall of the box is rotatably connected to a bidirectional threaded rod on each side above the support frame, and the ends of the two bidirectional threaded rods penetrate the outer wall of the box and are linked by a sprocket and a chain. Each bidirectional threaded rod is fitted with a first sliding sleeve and a second sliding sleeve at each end in the area inside the box. A pressure plate for fitting one side of the sapling trunk is connected between each first sliding sleeve, and a pressure plate for fitting the other side of the sapling trunk is connected between each second sliding sleeve.

[0013] Preferably, the two ends of the bidirectional threaded rod in the region inside the housing have opposite helical directions, and the bidirectional threaded rod is threadedly connected to both the first and second sliding sleeves.

[0014] Compared with existing technologies, the beneficial effects of this invention are as follows: This forestry engineering seedling storage device, which improves the survival rate, features temperature regulation: Through an air control structure, utilizing the characteristics of a heat-conducting piston rod and a shape memory alloy spring, the opening and closing degree of the air outlet can be automatically adjusted according to temperature changes inside the box, thereby controlling the amount of cold air entering and effectively reducing the temperature inside the box. During the day when sunlight is direct, it can prevent the temperature inside the box from becoming too high and causing heat damage to the seedlings; at night when the temperature drops, it can reduce heat loss by resetting and blocking the air outlet, thus playing a role in heat preservation and providing a suitable and stable temperature environment for the seedlings.

[0015] Humidity control: In rainy and humid weather, the sponge material on the sealing frame absorbs moisture and moves downwards, which opens the air vents for ventilation. This prevents excessive humidity inside the box from affecting the growth of the seedlings and effectively prevents the seedlings from developing diseases or growing poorly due to a humid environment, thus maintaining a suitable humidity level inside the box.

[0016] Root aeration and ventilation: The hemispherical area and perforated design on the support frame provide excellent ventilation space for the seedling roots, preventing root rot due to lack of oxygen. Simultaneously, the airflow-limiting structure, in conjunction with the wind-control structure, regulates the opening and closing of the first transfer port, driving airflow beneath the support frame and further promoting root aeration and oxygen absorption, ensuring normal root physiological activity and promoting healthy seedling growth.

[0017] Optimal watering: The drip irrigation system works in conjunction with the wind control system to avoid watering seedlings during the hottest part of the day, thus preventing problems such as a sharp drop in soil temperature, decreased soil aeration, and leaf scorch caused by watering. At night, when temperatures are suitable, the drip irrigation system automatically activates, better meeting the seedlings' water needs, improving water use efficiency, and promoting seedling growth. By optimizing temperature, humidity, air permeability, and watering, a more suitable storage and growth environment is created for seedlings, effectively avoiding problems such as stunted growth and disease caused by unsuitable environments. This significantly improves the survival rate of seedlings and is of great significance for the cultivation, transportation, and storage of seedlings in forestry projects. The entire process of the device does not require frequent manual intervention and realizes automated functions such as temperature regulation, ventilation, and watering, reducing the intensity of manual labor. Attached Figure Description

[0018] Figure 1 This is a frontal cross-sectional view of the sealing frame of the present invention in the state away from the support frame; Figure 2 This is a frontal cross-sectional view of the sealing frame of the present invention in the state of being close to the support frame; Figure 3 This is a schematic diagram of the deformation state structure of the shape memory alloy spring of the present invention; Figure 4 This is a front view structural diagram of the present invention; Figure 5 This is a schematic diagram of the rear view structure of the present invention; Figure 6 This is a top view of the bidirectional threaded rod structure of the present invention.

[0019] In the diagram: 1. Housing; 2. Support frame; 3. Air control structure; 301. Air supply equipment; 302. Air outlet; 303. T-shaped cylinder; 304. Heat-conducting piston rod; 305. Sealing frame; 306. Memory alloy spring; 307. First horizontal piston rod; 4. Drip structure; 401. Water tank; 402. Piston plate; 403. Liquid flow channel; 404. Opening plate; 5. Flow limiting structure; 501. L-shaped cylinder; 502. Second horizontal piston rod; 503. Vertical piston rod; 504. First transfer port; 505. Second transfer port; 506. U-shaped flexible hose; 6. Limiting structure; 601. Bidirectional threaded rod; 602. Chain; 603. First sliding sleeve; 604. Second sliding sleeve; 605. Pressure plate; 7. Air inlet; 8. Air outlet. Detailed Implementation

[0020] 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.

[0021] Please see Figure 1-6This invention provides a technical solution: a seedling storage device for forestry engineering that can improve the survival rate, comprising a box body 1, a support frame 2, an air control structure 3, an air supply device 301, an air outlet 302, a T-shaped cylinder 303, a heat-conducting piston rod 304, a sealing frame 305, a shape memory alloy spring 306, a first horizontal piston rod 307, a dripping structure 4, a water tank 401, a piston plate 402, a liquid flow channel 403, an opening plate 404, a flow-limiting structure 5, an L-shaped cylinder 501, a second horizontal piston rod 502, a vertical piston rod 503, a first transfer port 504, a second transfer port 505, a U-shaped flexible hose 506, a limiting structure 6, a bidirectional threaded rod 601, a chain 602, and a second horizontal piston rod 607. The box 1 includes a sliding sleeve 603, a second sliding sleeve 604, a pressure plate 605, an air inlet 7, and an air outlet 8. The box 1 is equipped with a support frame 2 for supporting seedlings. On one side of the box 1, above the support frame 2, there is an air control structure 3 for adjusting the air intake according to the temperature and humidity inside the box 1. The top of the box 1 is equipped with a drip structure 4 for watering, and the drip structure 4 is linked with the air control structure 3. On the other side of the box 1, above the support frame 2, there is a flow limiting structure 5 that is linked with the air control structure 3 and the drip structure 4 to restrict the air outflow from the box 1. The outer wall of the box 1 is equipped with an air inlet 7 above the support frame 2, and the outer wall of the box 1 is equipped with an air outlet 8 below the support frame 2.

[0022] The support frame 2 has several hemispherical areas at equal intervals for supporting the roots of the seedlings, and the hemispherical areas are evenly provided with several holes to facilitate root ventilation and prevent root rot.

[0023] The air control structure 3 includes an air supply device 301, an air outlet 302, a T-shaped cylinder 303, a heat-conducting piston rod 304, a sealing frame 305, a shape memory alloy spring 306, and a first horizontal piston rod 307. The air supply device 301 is installed on one side of the outer wall of the housing 1, and at least three air outlets 302 communicating with the air supply device 301 are opened on this side of the outer wall of the housing 1. The top of the inner wall of this side of the housing 1 is connected to the T-shaped cylinder 303, and a heat-conducting piston rod 304 is slidably connected to the lower end of the T-shaped cylinder 303. The lower end of the heat-conducting piston rod 304 is connected to a sealing frame 305 for blocking the air outlets 302. A shape memory alloy spring 306 is connected between the sealing frame 305 and the T-shaped cylinder 303, and a first horizontal piston rod 307 is slidably connected to one end of the T-shaped cylinder 303 near the center of the housing 1.

[0024] The sealing frame 305 is designed with an "L" shape and is equipped with a sponge material for absorbing moisture from the air.

[0025] The dripping structure 4 includes a water tank 401, a piston plate 402, a liquid flow channel 403, and an opening plate 404. The water tank 401 is installed on the top of the box body 1, and the piston plate 402 is provided inside the water tank 401. The end of the piston plate 402 passes through the top of the water tank 401 and is connected to a counterweight block for applying a constant downward pressure. Several liquid flow channels 403 are symmetrically arranged between the bottom of the water tank 401 and the top of the box body 1 about the upper hemispherical area of ​​the support frame 2. An opening plate 404 is provided at the top of the box body 1 to block the liquid flow channels 403. An opening is provided on the opening plate 404 to align the liquid flow channels 403 for easy dripping irrigation. One side of the bottom of the opening plate 404 is connected to the first horizontal piston rod 307.

[0026] The flow-limiting structure 5 includes an L-shaped cylinder 501, a second horizontal piston rod 502, a vertical piston rod 503, a first transfer port 504, a second transfer port 505, and a U-shaped hose 506. An L-shaped cylinder 501 is provided on the other side of the top of the box body 1, and the second horizontal piston rod 502 is slidably connected to one end of the L-shaped cylinder 501 near the center of the box body 1. The end of the second horizontal piston rod 502 is connected to the other side of the bottom of the opening plate 404. The vertical piston rod 503 is slidably connected to the lower end of the L-shaped cylinder 501, and the vertical piston rod 503 is used to block part of the first transfer port 504. The outer wall of the box body 1 is provided with the first transfer port 504 and the second transfer port 505 on the upper and lower sides of the support frame 2, and a U-shaped hose 506 is connected between the first transfer port 504 and the second transfer port 505.

[0027] The limiting structure 6 includes a bidirectional threaded rod 601, a chain 602, a first sliding sleeve 603, a second sliding sleeve 604, and a pressure plate 605. A bidirectional threaded rod 601 is rotatably connected to each side of the inner wall of the box 1 above the support frame 2. The ends of the two bidirectional threaded rods 601 penetrate the outer wall of the box 1 and are linked by a sprocket and a chain 602. Each bidirectional threaded rod 601 is fitted with a first sliding sleeve 603 and a second sliding sleeve 604 at each end of the inner area of ​​the box 1. A pressure plate 605 for fitting one side of the sapling trunk is connected between each first sliding sleeve 603, and a pressure plate 605 for fitting the other side of the sapling trunk is connected between each second sliding sleeve 604.

[0028] The two-way threaded rod 601 has opposite thread directions at both ends in the inner area of ​​the housing 1, and the two-way threaded rod 601 is threadedly connected to the first sliding sleeve 603 and the second sliding sleeve 604.

[0029] Working principle: According to Figure 1As shown, firstly, the seedlings are placed one by one into the box 1, so that the roots of the seedlings and the soil covering them are placed in the hemispherical area on the support frame 2. The holes in the hemispherical area on the support frame 2 facilitate ventilation of the seedling roots and prevent them from suffocating. Then, the double-threaded rod 601 is rotated, and the threads at both ends of the rod are reversed, so that the two first sliding sleeves 603 drive the pressure plate 605 to move closer to one side of the seedling trunk, while the two second sliding sleeves 604 drive the other pressure plate 605 to move closer to the other side of the seedling trunk, thus clamping and limiting the seedlings. An appropriate amount of water is injected into the water tank 401 beforehand. During the day, sunlight shines on the saplings through the light-transmitting windows on the box 1, allowing the saplings to photosynthesize and grow. As the sun continues to shine, the temperature inside the box 1 rises, easily generating water vapor. At this time, the temperature is transferred to the heat-conducting piston rod 304, which in turn conducts the heat to the shape memory alloy spring 306, causing it to deform and push the heat-conducting piston rod 304 downwards outwards from the T-shaped cylinder 303. This causes the sealing bracket 305 connected to the end of the heat-conducting piston rod 304 to detach from partially blocking the air outlet 302, allowing the air supply device 301 to deliver cool outside air into the box 1 through this detached air outlet 302. This pushes the warmer gas and water vapor inside the box 1 through the first transfer port 504, the U-shaped hose 506, and the second transfer port 504. 05 is discharged into the support frame 2 and finally discharged to the outside through the air outlet 8, achieving the purpose of ventilation and cooling inside the box 1. If the cooling effect is not obvious and the temperature inside the box 1 continues to rise, the longer the distance that the shape memory alloy spring 306 pushes the heat-conducting piston rod 304 to move, the more the sealing frame 305 will remove the obstruction of all the air outlets 302, further increasing the ventilation and cooling effect. In addition, in rainy and humid weather, if there is enough moisture inside the box 1, the sponge material on the sealing frame 305 will absorb a certain amount of moisture from the air, increasing the weight of the sealing frame 305, which is greater than the elasticity of the shape memory alloy spring 306. This will also cause the sealing frame 305 to move down and remove the obstruction of the air outlets 302, allowing for ventilation and preventing the seedlings inside the box 1 from being affected by the humid environment. Furthermore, due to direct sunlight during the day, especially at midday when temperatures are high, watering seedlings at this time, particularly with cooler water, will cause a rapid drop in soil temperature. Plant roots are very sensitive to temperature changes, and sudden temperature fluctuations can disrupt their normal physiological activities. Watering also fills the soil pores, reducing soil aeration. Plant roots need oxygen from the air to maintain normal physiological functions; after watering at midday, the oxygen content in the soil drops rapidly, leaving the roots in a state of oxygen deficiency and hindering respiration. Additionally, when water droplets fall onto plant leaves, they form a convex lens-like structure under direct sunlight. This lens focuses light onto a tiny point, causing a rapid increase in temperature at that point. This high temperature can directly scorch leaf cells, ultimately leading to leaf scorching, necrosis, and other problems. Therefore, the movement of the heat-conducting piston rod 304 inside the T-shaped cylinder 303 will drive the first horizontal piston rod 307 to move into the T-shaped cylinder 303 at the same time, pulling the opening plate 404 to move synchronously, so that the opening on the opening plate 404 and the liquid flow channel 403 are misaligned, and the water in the water tank 401 will not continue to drip irrigate the seedlings in the box 1, and watering will stop. At the same time, the movement of the opening plate 404 causes the second horizontal piston rod 502 to move outward inside the L-shaped cylinder 501, causing the vertical piston rod 503 to move into the L-shaped cylinder 501. The vertical piston rod 503 is no longer partially blocked by the first transfer port 504, allowing the first transfer port 504 to be fully exposed. This facilitates the air in the box 1 to enter the area below the support frame 2 through the first transfer port 504, the U-shaped hose 506, and the second transfer port 505, and finally be discharged from the air outlet 8. This process drives the airflow below the support frame 2, which is beneficial for the ventilation and oxygen absorption of the seedling roots and prevents root rot. When the temperature drops at night, the shape memory alloy spring 306 cools down and drives the heat-conducting piston rod 304 and the sealing frame 305 to reset, blocking the air outlet 302, reducing the air flow inside the box 1, and playing a certain role in heat preservation inside the box 1, which is beneficial to the growth of seedlings. The movement and reset of the heat-conducting piston rod 304 into the T-shaped cylinder 303 will push the first horizontal piston rod 307 outward within the T-shaped cylinder 303, causing the opening plate 404 to reset. The opening on the opening plate 404 is aligned with the liquid flow channel 403, allowing the water tank 401 to drip-irrigate the seedlings through the liquid flow channel 403 under the pressure of the piston plate 402 and the counterweight. At the same time, the reset of the opening plate 404 pushes the second horizontal piston rod 502 into the L-shaped cylinder 501, causing the vertical piston rod 503 in the L-shaped cylinder 501 to move downward and reset, partially blocking the first transfer port 504, further reducing airflow and temperature loss within the box 1, which is beneficial for seedling growth and storage. This is the working principle of the forestry engineering seedling storage device that can improve the survival rate.

[0030] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A seedling storage device for forestry projects that can improve the survival rate, comprising a box (1), characterized in that: The box (1) is equipped with a support frame (2) for carrying seedlings. On one side of the box (1) above the support frame (2), there is a wind control structure (3) for adjusting the air intake according to the temperature and humidity inside the box (1). The top of the box (1) is equipped with a drip structure (4) for watering. The drip structure (4) is linked with the wind control structure (3). On the other side of the box (1) above the support frame (2), there is a flow restriction structure (5) linked with the wind control structure (3) and the drip structure (4) for restricting the air outflow inside the box (1). The outer wall of the box (1) above the support frame (2) is equipped with an air inlet (7). The outer wall of the box (1) below the support frame (2) is equipped with an air outlet (8). The front and rear ends of the outer wall of the box 1 are equipped with light-transmitting windows to facilitate the light transmission of the seedlings inside.

2. The forestry engineering seedling storage device according to claim 1, characterized in that: The support frame (2) is provided with several hemispherical areas at equal intervals for supporting the roots of the seedlings, and the hemispherical areas are provided with several holes to facilitate root ventilation and prevent root rot.

3. The forestry engineering seedling storage device according to claim 1, characterized in that: The air control structure (3) includes an air supply device (301), an air outlet (302), a T-shaped cylinder (303), a heat-conducting piston rod (304), a sealing frame (305), a memory alloy spring (306), and a first horizontal piston rod (307). The air supply device (301) is installed on one side of the outer wall of the housing (1), and at least three air outlets (302) communicating with the air supply device (301) are opened on this side of the outer wall of the housing (1). The inner wall of this side of the housing (1) A T-shaped cylinder (303) is connected to the top, and a heat-conducting piston rod (304) is slidably connected to the lower end of the T-shaped cylinder (303). A blocking frame (305) for blocking the air outlet (302) is connected to the lower end of the heat-conducting piston rod (304). A memory alloy spring (306) is connected between the blocking frame (305) and the T-shaped cylinder (303). A first horizontal piston rod (307) is slidably connected to one end of the T-shaped cylinder (303) near the center of the box (1).

4. A seedling storage device for forestry projects that can improve survival rate according to claim 3, characterized in that: The sealing frame (305) is configured with an "L" shape and is equipped with a sponge material for absorbing moisture in the air.

5. A seedling storage device for forestry engineering that can improve the survival rate according to claim 3, characterized in that: The dripping structure (4) includes a water tank (401), a piston plate (402), a liquid flow channel (403), and an opening plate (404). The water tank (401) is installed on the top of the box body (1), and the piston plate (402) is provided inside the water tank (401). The end of the piston plate (402) passes through the top of the water tank (401) and is connected to a counterweight block for applying a constant downward pressure. Several liquid flow channels (403) are symmetrically arranged between the bottom of the water tank (401) and the top of the box body (1) about the upper hemispherical area of ​​the support frame (2). An opening plate (404) for sealing the liquid flow channels (403) is provided on the top of the box body (1). An opening is provided on the opening plate (404) for aligning the liquid flow channels (403) to facilitate drip irrigation. One side of the bottom of the opening plate (404) is connected to the first horizontal piston rod (307).

6. A seedling storage device for forestry engineering that can improve the survival rate according to claim 5, characterized in that: The flow-limiting structure (5) includes an L-shaped cylinder (501), a second horizontal piston rod (502), a vertical piston rod (503), a first transfer port (504), a second transfer port (505), and a U-shaped hose (506). An L-shaped cylinder (501) is provided on the other side of the top of the housing (1), and a second horizontal piston rod (502) is slidably connected to one end of the L-shaped cylinder (501) near the center of the housing (1). The end of the second horizontal piston rod (502) is connected to... On the other side of the bottom of the opening plate (404), the lower end of the L-shaped cylinder (501) is slidably connected to a vertical piston rod (503), and the vertical piston rod (503) is used to block part of the first transfer port (504). The outer wall of the box (1) is provided with a first transfer port (504) and a second transfer port (505) on the upper and lower sides of the support frame (2), and a U-shaped flexible hose (506) is connected between the first transfer port (504) and the second transfer port (505).

7. A seedling storage device for forestry engineering that can improve the survival rate according to claim 1, characterized in that: The limiting structure (6) includes a bidirectional threaded rod (601), a chain (602), a first sliding sleeve (603), a second sliding sleeve (604), and a pressure plate (605). The inner wall of the box (1) is rotatably connected to a bidirectional threaded rod (601) on each side above the support frame (2). The ends of the two bidirectional threaded rods (601) penetrate the outer wall of the box (1) and are connected by a sprocket and a chain (602) for linkage. Each bidirectional threaded rod (601) is fitted with a first sliding sleeve (603) and a second sliding sleeve (604) at each end of the area inside the box (1). Each first sliding sleeve (603) is connected to a pressure plate (605) for fitting one side of the sapling trunk, and each second sliding sleeve (604) is connected to a pressure plate (605) for fitting the other side of the sapling trunk.

8. A seedling storage device for forestry engineering that can improve the survival rate according to claim 7, characterized in that: The two-way threaded rod (601) has opposite thread directions at both ends in the area inside the housing (1), and the two-way threaded rod (601) is threadedly connected to the first sliding sleeve (603) and the second sliding sleeve (604).

Images