Seedling raising device for forestry engineering afforestation

Abstract

The invention discloses a seedling raising device for forestry engineering afforestation, and belongs to the technical field of forestry seedling raising equipment. Trays are uniformly, horizontally and fixedly mounted on the frame, and limiting grooves are formed in the top walls of the trays; limiting sleeves are evenly, vertically and fixedly installed in the limiting grooves, and nutrient soil is contained in the limiting sleeves. When water injection into the limiting groove is stopped, water in the limiting groove gradually penetrates through the one-way valve to enter the limiting sleeve, so that the liquid level in the limiting sleeve and the liquid level in the cavity are continuously lowered, the floating block gradually moves downwards, the corrugated pipe is extruded at the moment, and gas in the corrugated pipe is exhausted through the exhaust valve; air flow exhausted from the air holes flows upwards in gaps between the nutrient soil, oxygen can be provided for the roots of the saplings along with diffusion of the air flow in the gaps between the nutrient soil, the effect of ensuring normal growth of the saplings is achieved, meanwhile, when the air flow flows upwards in the nutrient soil, the diameter of an air flow channel can be increased, and the air flow is prevented from flowing upwards. And gaps among the nutrient soil are prevented from being filled with the soil with smaller volume.

Description

Technical Field

[0001] This invention relates to the field of forestry seedling equipment technology, and more specifically, to a seedling raising device for afforestation in forestry engineering. Background Technology

[0002] In the field of artificial afforestation, a centralized and large-scale seedling cultivation model is currently widely adopted. This involves cultivating seedlings in batches in a nursery and then transplanting them only after they have grown to meet predetermined standards for transplanting. During this seedling cultivation period, frequent irrigation implemented to meet the growth needs of the seedlings can easily lead to soil compaction. Soil compaction reduces porosity and deteriorates the soil structure, resulting in poor aeration and significantly weakened water penetration and retention capacity. This severely hinders the absorption of water and nutrients by the seedling roots, leading to slow seedling growth, a forced extension of the seedling cultivation period, and ultimately increased seedling costs and low overall efficiency.

[0003] To address the aforementioned soil compaction problem, existing technologies employ basin immersion (or bottom irrigation) to alleviate it, which involves supplying water to the bottom of a container to reduce surface soil compaction. However, this method still has significant shortcomings in practice: firstly, its water use efficiency is low, easily leading to water waste; secondly, as irrigation water is consumed and evaporates, the soil matrix will gradually settle and compact under gravity and capillary action, ultimately making compaction unavoidable.

[0004] Therefore, a seedling raising device for afforestation in forestry engineering is proposed. Summary of the Invention

[0005] In view of the problems existing in the prior art, the purpose of this invention is to provide a seedling raising device for afforestation in forestry engineering, which can reduce the probability of soil clumping during the seedling raising process.

[0006] To solve the above problems, the present invention adopts the following technical solution.

[0007] A seedling raising device for afforestation in forestry engineering includes a frame;

[0008] The frame is uniformly and horizontally fixed with trays, and the top wall of the trays is provided with limit grooves;

[0009] A limit sleeve is uniformly and vertically fixedly installed in the limit groove, and the limit sleeve is filled with nutrient soil.

[0010] A water inlet is provided on the side wall of the tray;

[0011] A cavity is provided on the side wall of the limiting sleeve, and a through hole communicating with the limiting groove is provided on the side wall of the cavity.

[0012] The sleeve extending into the limiting sleeve is fixedly inserted on the side wall of the cavity, and a one-way valve is fixedly embedded in the sleeve; and the ratio of the water injection amount of the water inlet to the sum of the drainage amounts of all the one-way valves is 5-8;

[0013] A bellows is arranged in the cavity, and an exhaust valve is fixedly installed on the side wall of the bellows, and the output end of the exhaust valve extends into the limiting sleeve;

[0014] A float is fixedly installed on the top wall of the bellows, and an air inlet valve is fixedly installed on the top wall of the limiting sleeve, and a guide pipe extending to the top wall of the bellows is fixedly installed on the input end of the air inlet valve.

[0015] Further, a plurality of support rods are evenly and horizontally arranged in the limiting sleeve, and a flow guide cavity is formed in each support rod;

[0016] A communication pipe is jointly inserted between two adjacent flow guide cavities;

[0017] The output end of the exhaust valve extends into the flow guide cavity, and a gas hole communicating with the outside is formed in the bottom wall of each flow guide cavity.

[0018] Further, an installation sleeve corresponding to the gas hole is vertically and fixedly installed on the inner top wall of the flow guide cavity, an insertion opening is formed in the bottom end of the installation sleeve, a sliding rod is vertically and slidingly inserted into the insertion opening, a sealing plate cooperating with the gas hole is fixedly installed on the bottom end of the sliding rod, and an elastic member is jointly installed between the sliding rod and the top wall of the insertion opening.

[0019] Further, a circular ring sleeve corresponding to the gas hole is fixedly installed on the bottom wall of the support rod, the ratio of the inner diameter of the circular ring sleeve to the diameter of the gas hole is 1.5-2, and a filter screen is fixedly installed on the bottom end of the circular ring sleeve.

[0020] Further, a through hole communicating with the limiting sleeve is formed in the top wall of the flow guide cavity;

[0021] An elastic film covering the surface of the through hole is arranged on the top wall of the support rod, and the edge of the elastic film is fixedly connected with the top wall of the support rod;

[0022] And a driving mechanism for driving the elastic film to expand is arranged in the flow guide cavity.

[0023] Further, the driving mechanism comprises a top rod vertically and slidingly inserted into the top wall of the installation sleeve, and the bottom end of the top rod is fixedly connected with the sliding rod;

[0024] The top rod is in a cylindrical shape, and the top end of the top rod is in a spherical shape.

[0025] Further, a gas pipe extending to the top wall of the installation sleeve is fixedly inserted on the top wall of the support rod.

[0026] Further, a sliding groove is vertically and evenly formed in the inner side wall of the limiting sleeve, and a plurality of sliding grooves are evenly and circumferentially distributed on the inner wall of the limiting sleeve.

[0027] The pressing plate is slidably installed in the sliding groove, a spring is jointly installed between the pressing plate and the sliding groove, and a limiting sleeve is provided with a pushing mechanism for driving the pressing plate to extend out of the sliding groove.

[0028] Further, the pushing mechanism comprises an elastic air bag fixedly installed on the side wall of the cavity, an output end of the elastic air bag extends into one of the sliding grooves, and an arc-shaped pipe is jointly inserted between the adjacent two sliding grooves to communicate the adjacent two sliding grooves.

[0029] Further, the side wall of the elastic air bag is uniformly provided with protrusions, and the protrusions are located on the same vertical line.

[0030] Compared with the prior art, the beneficial effects of the present application are that:

[0031] (1) The present scheme cooperates with the float through the bellows, the air inlet valve and the air outlet valve, and the float always floats on the water surface, so as to pull the bellows as the water level rises, so that the bellows inhale air from the outside through the air inlet valve.

[0032] When the water injection into the limiting groove is stopped, the water in the limiting groove gradually passes through the one-way valve into the limiting sleeve, so that the liquid level in the limiting sleeve and the cavity continues to decrease, and the float gradually moves down, at this time the bellows is extruded, so that the gas in the bellows is discharged through the air outlet valve, and the airflow discharged from the air hole flows upward in the gap between the nutrient soil, and as the airflow diffuses in the gap between the nutrient soil, it can provide oxygen for the roots of the sapling, ensuring the normal growth of the sapling, and at the same time, as the airflow flows upward in the nutrient soil, it can expand the diameter of the airflow channel, preventing the small soil from filling the gap between the nutrient soil, thereby reducing the probability of soil compaction.

[0033] (2) The present scheme cooperates with the elastic membrane and the ejector rod, and during the movement of the sliding rod, the ejector rod moves synchronously, driving the elastic membrane to periodically protrude and restore, and under the action of the spherical surface, the frictional force acting on the elastic membrane is reduced, thereby reducing the degree of wear of the elastic membrane. When the elastic membrane protrudes, it will exert an upward thrust on the upper nutrient soil, causing it to lift upward, and when the elastic membrane restores, the upper nutrient soil will naturally fall under the action of gravity. Through this reciprocating motion, the nutrient soil in the upper region of the elastic membrane is constantly disturbed and shaken. During the shaking process, the soil particles rub against each other, which can gradually grind and break the caked nutrient soil, thereby effectively reducing the possibility of soil compaction.

[0034] (3) The present scheme is provided with an air pipe, when the sliding rod is retracted into the mounting sleeve, the ejector rod pushes the elastic membrane upward. At the same time, the air pressure inside the mounting sleeve rises, the gas is discharged through the air pipe, causing the air pressure between the elastic membrane and the outer wall of the support rod to rise synchronously, thereby causing the elastic membrane to expand and increase in surface area.

[0035] The contact area of the elastic film top wall with the nutrient soil is also increased, so that when the elastic film exerts an upward force, a larger range of nutrient soil can be pushed, and the crushing effect on the caked part is enhanced.

[0036] (4) The scheme is characterized in that the convex blocks, elastic air bags and pressing plates are arranged, when the chute is full of gas, the pushing force of the gas on the pressing plates will exceed the elastic force of the springs, and the pressing plates are pushed out of the chute. Since the pressing plates are uniformly distributed along the circumference, when they are extended, multiple pressing plates will gather towards the center, so as to crush the caked nutrient soil, and play a role in keeping the nutrient soil in a loose state, so as to facilitate the flow of gas. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0038] Figure 2 It is a schematic diagram of the front cross-sectional structure of the present application;

[0039] Figure 3 It is a schematic diagram of the enlarged structure of A in the present application; Figure 2

[0040] Figure 4 It is a schematic diagram of the cross-sectional structure of the limiting sleeve of the present application;

[0041] Figure 5 It is a schematic diagram of the combination structure of the chute and the pressing plate of the present application;

[0042] Figure 6 It is a schematic diagram of the structure of the limiting sleeve of the present application.

[0043] Explanation of reference numerals in the drawing:

[0044] 1, frame; 2, tray; 3, limiting groove; 4, limiting sleeve; 5, water inlet; 6, cavity; 7, through hole; 8, sleeve; 9, one-way valve; 10, corrugated pipe; 11, exhaust valve; 12, float; 13, air inlet valve; 14, conduit; 15, support rod; 16, flow guide cavity; 17, communication pipe; 18, air hole; 19, mounting sleeve; 20, sliding rod; 21, plugging plate; 22, elastic member; 23, circular ring sleeve; 24, filter screen; 25, elastic film; 26, jacking rod; 27, air pipe; 28, chute; 29, pressing plate; 30, spring; 31, elastic air bag; 32, arc-shaped pipe; 33, convex block. DETAILED DESCRIPTION

[0045] ​Clearly, the described embodiments are merely a part of the embodiments of the present application, rather than all the embodiments, and based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative effort shall fall within the protection scope of the present application.

[0046] Embodiment 1:

[0047] Please refer to Figures 1 to 6 A seedling raising device for afforestation in forestry engineering comprises a frame 1;

[0048] A plurality of trays 2 are uniformly and horizontally fixedly installed on the frame 1, and a limiting groove 3 is formed in the top wall of each tray 2;

[0049] A limiting sleeve 4 is uniformly and vertically fixedly installed in the limiting groove 3, and nutrient soil is contained in the limiting sleeve 4, wherein the nutrient soil is a mixture of fertilizer and sand;

[0050] A water inlet 5 is formed in the side wall of each tray 2, and an external water source is communicated with the water inlet 5 through a water pipe, so that flowing water can be injected into the limiting groove 3;

[0051] A cavity 6 is formed in the side wall of the limiting sleeve 4, and a through hole 7 is formed in the side wall of the cavity 6 and communicated with the limiting groove 3;

[0052] A sleeve 8 extending into the limiting sleeve 4 is fixedly inserted in the side wall of the cavity 6, and a one-way valve 9 is fixedly embedded in the sleeve 8; and the ratio of the water injection amount of the water inlet 5 to the sum of the water discharge amounts of all the one-way valves 9 is 5-8, so that the water injection amount of the limiting groove 3 is greater than the water discharge amount of the one-way valve 9, thereby continuously rising the water level in the limiting groove 3;

[0053] A bellows 10 is arranged in the cavity 6, and an exhaust valve 11 is fixedly installed on the side wall of the bellows 10, and the output end of the exhaust valve 11 extends into the limiting sleeve 4;

[0054] A float 12 is fixedly installed on the top wall of the bellows 10, an air inlet valve 13 is fixedly installed on the top wall of the limiting sleeve 4, a guide pipe 14 extending to the top wall of the bellows 10 is fixedly installed on the input end of the air inlet valve 13, and the guide pipe 14 is an elastic pipe, thereby ensuring that the bellows 10 can normally stretch and contract.

[0055] A plurality of support rods 15 are uniformly and horizontally arranged in the limiting sleeve 4, and a flow guide cavity 16 is formed in the inside of each support rod 15;

[0056] A communication pipe 17 is jointly inserted between adjacent two flow guide cavities 16, and the flow guide cavities 16 are communicated with each other through a set of communication pipes 17, thereby jointly forming a through internal ventilation network;

[0057] The output end of the exhaust valve 11 extends into the flow guide cavity 16, and the bottom wall of each flow guide cavity 16 is provided with a gas hole 18 in communication with the outside, so that the internal network is in communication with the outside atmosphere to realize the orderly flow and exchange of gas.

[0058] A mounting sleeve 19 corresponding to the gas hole 18 is vertically and fixedly installed on the inner top wall of the flow guide cavity 16, the bottom end of the mounting sleeve 19 is provided with a socket, a sliding rod 20 is vertically and slidingly inserted into the socket, the bottom end of the sliding rod 20 is fixedly installed with a sealing plate 21 matched with the gas hole 18, the sealing plate 21 is used to block the gas hole 18, and the sliding rod 20 and the socket top wall are jointly installed with an elastic element 22. When the sealing plate 21 is not forced, the sliding rod 20 is retracted into the socket under the action of the elastic element 22, at this time, the sealing plate 21 blocks the gas hole 18, so as to cut off the flow guide cavity 16 from the limiting sleeve 4, preventing the tree roots from entering the gas hole 18, and facilitating the transplanting of seedlings.

[0059] When irrigation is needed, water is injected into the water inlet 5 through an external water source, at this time, the water level in the limiting groove 3 gradually rises.

[0060] Under the action of the through hole 7, the water in the limiting groove 3 enters the cavity 6, and the water in the cavity 6 is discharged into the limiting sleeve 4 through the sleeve 8 and the one-way valve 9, so as to wet the nutrient soil in the limiting sleeve 4 and provide a moist growing environment for the seedlings planted in the limiting sleeve 4.

[0061] As the water level in the limiting groove 3 rises, the water level in the cavity 6 also rises, and the floating block 12 always floats on the water surface, so as the water level rises, the floating block 12 pulls the bellows 10, so that the bellows 10 inhales air from the outside through the air inlet valve 13.

[0062] When the water injection into the limiting groove 3 is stopped, the water in the limiting groove 3 gradually passes through the one-way valve 9 into the limiting sleeve 4, so the liquid level in the limiting sleeve 4 and the cavity 6 continuously decreases, and the floating block 12 gradually moves down, at this time, the bellows 10 is squeezed, so the gas in the bellows 10 is discharged through the exhaust valve 11, when the exhaust valve 11 discharges, the flow guide cavity 16 is in a high pressure state, at this time, the high pressure gas exerts a downward pressure on the sealing plate 21, therefore, the sealing plate 21 gradually moves down and is out of contact with the gas hole 18, so as to ensure that the gas hole 18 can normally discharge, at the same time, the elastic element 22 is stretched, when the exhaust valve 11 stops discharging, the elastic element 22 restores and pulls the sealing plate 21 to block the gas hole 18 again.

[0063] The air flow discharged from the air holes 18 flows upward in the gaps between the nutrient soil, and as the air flow diffuses in the gaps between the nutrient soil, oxygen can be provided for the roots of the sapling, ensuring normal growth of the sapling. Meanwhile, as the air flow flows upward in the nutrient soil, the diameter of the air flow channel is expanded, preventing smaller soil from filling the gaps between the nutrient soil and reducing the probability of soil compaction.

[0064] Therefore, after each irrigation, air can be discharged from the limiting sleeve 4 outward, reducing the probability of compaction of the nutrient soil in the limiting sleeve 4 and providing a good growth environment for the sapling, ensuring normal growth of the sapling.

[0065] As shown in Figure 2 , Figure 3 , a circular ring sleeve 23 corresponding to each air hole 18 is fixedly installed on the bottom wall of the support rod 15, and the ratio of the inner diameter of the circular ring sleeve 23 to the diameter of the air hole 18 is 1.5-2, so that the diffusion range of the nutrient soil can be limited by the side wall of the circular ring sleeve 23. The bottom end of the circular ring sleeve 23 is fixedly installed with a filter screen 24 to prevent the nutrient soil from accumulating on the surface of the blocking plate 21, ensuring normal downward movement of the blocking plate 21.

[0066] As shown in Figure 3 , a through hole communicating with the limiting sleeve 4 is formed in the top wall of the flow guide cavity 16.

[0067] An elastic membrane 25 covering the surface of the through hole is arranged on the top wall of the support rod 15, and the edge of the elastic membrane 25 is fixedly connected with the top wall of the support rod 15.

[0068] A driving mechanism for driving the elastic membrane 25 to expand is arranged in the flow guide cavity 16.

[0069] The driving mechanism includes a top rod 26 vertically slidingly inserted into the top wall of the mounting sleeve 19, and the bottom end of the top rod 26 is fixedly connected with the sliding rod 20.

[0070] The top rod 26 is cylindrical, and the top end of the top rod 26 is spherical.

[0071] During the movement of the sliding rod 20, the top rod 26 moves synchronously, periodically protruding and recovering the elastic membrane 25. Under the action of the spherical surface, the frictional force acting on the elastic membrane 25 is reduced, thereby reducing the degree of wear of the elastic membrane 25. When the elastic membrane 25 protrudes, an upward pushing force is applied to the nutrient soil above, causing it to lift upward. When the elastic membrane 25 recovers, the nutrient soil above naturally falls under the action of gravity. Through this reciprocating motion, the nutrient soil in the area above the elastic membrane 25 is continuously disturbed and shaken. During the shaking process, the soil particles rub against each other, gradually grinding and breaking the caked nutrient soil, thereby effectively reducing the possibility of soil compaction.

[0072] As Figure 3 shown, the top wall of the support rod 15 is fixedly inserted with an air pipe 27 extending to the top wall of the mounting sleeve 19.

[0073] When the sliding rod 20 is retracted into the mounting sleeve 19, the top rod 26 is pushed upward to push the elastic film 25. At the same time, the air pressure inside the mounting sleeve 19 rises, and the gas is discharged through the air pipe 27, causing the air pressure between the elastic film 25 and the outer wall of the support rod 15 to rise synchronously, thereby causing the elastic film 25 to expand and increase in surface area.

[0074] The contact area of the top wall of the elastic film 25 with the nutrient soil also increases, so that when the elastic film 25 is forced upward, it can push a larger range of nutrient soil, enhancing the crushing effect on the clumped part.

[0075] As Figure 4 , Figure 5 , Figure 6 shown, the inner side wall of the limiting sleeve 4 is uniformly and vertically provided with a plurality of sliding grooves 28, and the plurality of sliding grooves 28 are uniformly circumferentially distributed on the inner wall of the limiting sleeve 4.

[0076] The sliding grooves 28 are slidably installed with a pressing plate 29, and the pressing plate 29 and the sliding grooves 28 are jointly installed with a spring 30, and the limiting sleeve 4 is provided with a pushing mechanism for driving the pressing plate 29 to extend out of the sliding groove 28.

[0077] The pushing mechanism comprises an elastic air bag 31 fixedly installed on the side wall of the cavity 6, and the output end of the elastic air bag 31 extends into one of the sliding grooves 28, and an arc-shaped pipe 32 is jointly inserted between adjacent two sliding grooves 28, and the adjacent two sliding grooves 28 are communicated through the arc-shaped pipe 32.

[0078] The side wall of the elastic air bag 31 is uniformly fixedly installed with a plurality of protrusions 33, and the distance between adjacent two protrusions 33 is greater than the height of the side surface of the floating block 12, and the plurality of protrusions 33 are located on the same vertical line.

[0079] During the movement of the floating block 12, each protrusion 33 is intermittently pressed, so that the elastic air bag 31 is periodically compressed. When the elastic air bag 31 is pressed, the gas inside the elastic air bag 31 enters the sliding groove 28 and is distributed to each sliding groove 28 through the action of the arc-shaped pipe 32, so that all the sliding grooves 28 are filled with gas.

[0080] When the sliding grooves 28 are filled with gas, the pushing force of the gas on the pressing plate 29 will exceed the elastic force of the spring 30, and the pressing plate 29 will extend out of the sliding groove 28. Since the pressing plate 29 is uniformly distributed along the circumference, when it extends out, the plurality of pressing plates 29 will converge towards the center, thereby extruding and crushing the clumped nutrient soil, playing a role in keeping the nutrient soil in a loose state, thereby facilitating the flow of gas.

[0081] Method for use: when irrigation is needed, water is injected into the water inlet 5 through an external water source, at this time the water level in the limiting groove 3 gradually rises.

[0082] Under the action of the through hole 7, the water in the limiting groove 3 enters the cavity 6, and the water in the cavity 6 is discharged into the limiting sleeve 4 through the sleeve 8 and the one-way valve 9, so as to wet the nutrient soil in the limiting sleeve 4 and provide a moist growing environment for the seedling planted in the limiting sleeve 4.

[0083] As the water level in the limiting groove 3 rises, the water level in the cavity 6 also rises, and the floating block 12 always floats on the water surface, so as the water level rises, the floating block 12 pulls the bellows 10, so that the bellows 10 inhales air from the outside through the air inlet valve 13.

[0084] When the water injection into the limiting groove 3 is stopped, the water in the limiting groove 3 gradually enters the limiting sleeve 4 through the one-way valve 9, so the liquid level in the limiting sleeve 4 and the cavity 6 continues to decrease, and the floating block 12 gradually moves down, at this time the bellows 10 is squeezed, so the gas in the bellows 10 is discharged through the exhaust valve 11, when the exhaust valve 11 discharges, the guide cavity 16 is in a high pressure state at this time, the high pressure gas exerts a downward pressure on the blocking plate 21, so the blocking plate 21 gradually moves down and is out of contact with the air hole 18, thereby ensuring that the air hole 18 can normally discharge air, at the same time, the elastic member 22 is stretched, when the exhaust valve 11 stops discharging, the elastic member 22 restores and pulls the blocking plate 21 to block the air hole 18 again.

[0085] The air flow discharged from the air hole 18 flows upward in the gap between the nutrient soil, as the air flow diffuses in the gap between the nutrient soil, it can provide oxygen for the roots of the seedling, thereby ensuring the normal growth of the seedling, at the same time, when the air flow flows upward in the nutrient soil, it can expand the diameter of the air flow channel, thereby preventing the soil with small volume from filling the gap between the nutrient soil, thereby reducing the probability of soil compaction.

[0086] Therefore, each time after irrigation is completed, air can be discharged from the limiting sleeve 4, thereby reducing the probability of soil compaction in the limiting sleeve 4, providing a good growing environment for the seedling, and ensuring the normal growth of the seedling.

[0087] During the movement of the slide rod 20, the top rod 26 moves synchronously, driving the elastic membrane 25 to periodically protrude and restore. Under the action of the spherical surface, the friction force on the elastic membrane 25 is reduced, thereby reducing the wear degree of the elastic membrane 25. When the elastic membrane 25 protrudes, an upward pushing force is applied to the upper nutrient soil, so that the nutrient soil is lifted upward. When the elastic membrane 25 restores, the upper nutrient soil naturally falls under the action of gravity. Through the reciprocating movement, the nutrient soil in the upper region of the elastic membrane 25 is continuously disturbed and shaken. During the shaking process, the soil particles rub against each other, which can gradually grind and crush the caked nutrient soil, thereby effectively reducing the possibility of soil hardening.

[0088] When the slide rod 20 is retracted into the mounting sleeve 19, the top rod 26 pushes the elastic membrane 25 upward. At the same time, the air pressure inside the mounting sleeve 19 rises, and the gas is discharged through the air pipe 27, causing the air pressure between the elastic membrane 25 and the outer wall of the support rod 15 to rise synchronously, thereby causing the elastic membrane 25 to expand and increase in surface area.

[0089] The contact area between the top wall of the elastic membrane 25 and the nutrient soil also increases, so that when the elastic membrane 25 exerts a force upward, it can push a larger range of nutrient soil, enhancing the crushing effect on the caked portion.

[0090] During the movement of the floating block 12, the protrusions 33 are intermittently pressed, causing the elastic air bags 31 to be periodically compressed. When the elastic air bags 31 are pressed, the gas inside enters the chute 28 and is distributed to each chute 28 through the action of the arc-shaped pipe 32, causing all the chutes 28 to be filled with gas.

[0091] When the chutes 28 are filled with gas, the pushing force of the gas on the pressure plate 29 will exceed the elastic force of the spring 30, pushing the pressure plate 29 out of the chute 28. Since the pressure plates 29 are uniformly distributed along the circumference, when they are extended, multiple pressure plates 29 will converge towards the center, thereby crushing the caked nutrient soil and maintaining the loose state of the nutrient soil, thereby facilitating the flow of gas.

[0092] The above description is only a preferred embodiment of the present application; however, the protection scope of the present application is not limited thereto. Any person skilled in the art can make equivalent replacements or changes to the technical solutions and improved concepts of the present application within the technical scope disclosed by the present application, which should be covered by the protection scope of the present application.

Claims

1. A seedling raising device for afforestation engineering afforestation, comprising a frame (1); Its characterized in that: The frame (1) is uniformly and horizontally fixedly installed with a tray (2), and a limiting groove (3) is formed in the top wall of the tray (2); The limiting groove (3) is uniformly and vertically fixedly installed with a limiting sleeve (4), and the limiting sleeve (4) is filled with nutrient soil; A water inlet (5) is formed in the side wall of the tray (2); A cavity (6) is formed in the side wall of the limiting sleeve (4), and a through hole (7) in communication with the limiting groove (3) is formed in the side wall of the cavity (6); A sleeve (8) extending into the limiting sleeve (4) is fixedly inserted in the side wall of the cavity (6), a one-way valve (9) is fixedly embedded in the sleeve (8), and the ratio of the water injection amount of the water inlet (5) to the sum of the drainage amounts of all the one-way valves (9) is 5-8; A bellows (10) is arranged in the cavity (6), an exhaust valve (11) is fixedly installed on the side wall of the bellows (10), and the output end of the exhaust valve (11) extends into the limiting sleeve (4); A float (12) is fixedly installed on the top wall of the bellows (10), an air inlet valve (13) is fixedly installed on the top wall of the limiting sleeve (4), and a guide pipe (14) extending to the top wall of the bellows (10) is fixedly installed on the input end of the air inlet valve (13).

2. The device according to claim 1, characterized in that: A plurality of support rods (15) are uniformly and horizontally arranged in the limiting sleeve (4), and a flow guide cavity (16) is formed in each support rod (15); A communication pipe (17) is jointly inserted between adjacent two flow guide cavities (16); The output end of the exhaust valve (11) extends into the flow guide cavity (16), and a gas hole (18) in communication with the outside is formed in the bottom wall of each flow guide cavity (16).

3. The device according to claim 2, characterized in that: A mounting sleeve (19) corresponding to the gas hole (18) is vertically fixedly installed on the inner top wall of the flow guide cavity (16), a socket is formed in the bottom end of the mounting sleeve (19), a sliding rod (20) is vertically and slidingly inserted in the socket, a sealing plate (21) matched with the gas hole (18) is fixedly installed on the bottom end of the sliding rod (20), and an elastic member (22) is jointly arranged between the sliding rod (20) and the top wall of the socket.

4. The device according to claim 3, characterized in that: A circular ring sleeve (23) corresponding to the gas hole (18) is fixedly installed on the bottom wall of the support rod (15), the ratio of the inner diameter of the circular ring sleeve (23) to the diameter of the gas hole (18) is 1.5-2, and a filter screen (24) is fixedly installed on the bottom end of the circular ring sleeve (23).

5. The device according to claim 4, characterized in that: A through hole in communication with the limiting sleeve (4) is formed in the top wall of the flow guide cavity (16); An elastic film (25) covering the surface of the through hole is arranged on the top wall of the support rod (15), and the edge of the elastic film (25) is fixedly connected with the top wall of the support rod (15); And a driving mechanism for driving the elastic film (25) to expand is arranged in the flow guide cavity (16).

6. The device according to claim 5, characterized in that: The driving mechanism comprises a top rod (26) vertically and slidingly inserted in the top wall of the mounting sleeve (19), and the bottom end of the top rod (26) is fixedly connected with the sliding rod (20). The top rod (26) is cylindrical, and the top end of the top rod (26) is spherical.

7. The device according to claim 6, characterized in that: A gas pipe (27) extending to the top wall of the mounting sleeve (19) is fixedly inserted into the top wall of the support rod (15).

8. The device according to claim 7, characterized in that: Uniformly vertical grooves (28) are arranged on the inner side wall of the limiting sleeve (4), and a plurality of the grooves (28) are uniformly circumferentially distributed on the inner wall of the limiting sleeve (4). A pressing plate (29) is slidably installed in the groove (28), a spring (30) is jointly installed between the pressing plate (29) and the groove (28), and a pushing mechanism for driving the pressing plate (29) to extend out of the groove (28) is arranged on the limiting sleeve (4).

9. The device according to claim 8, characterized in that: The pushing mechanism comprises an elastic air bag (31) fixedly installed on the side wall of the cavity (6), the output end of the elastic air bag (31) extends into one of the grooves (28), and an arc-shaped pipe (32) is jointly inserted between adjacent two of the grooves (28) to communicate the adjacent two grooves (28).

10. The device according to claim 9, characterized in that: Uniformly fixed blocks (33) are arranged on the side wall of the elastic air bag (31), and a plurality of the blocks (33) are located on the same vertical line.

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