Water supplementing device for vegetable seedling culture

Abstract

The invention relates to the technical field of modern agriculture, in particular to a water replenishing device for vegetable seedling culture, which comprises a seedling culture bin, a water replenishing device is arranged in the middle of the inner side of the seedling culture bin, and a plurality of water replenishing assemblies for replenishing water to vegetable seedlings are arranged on the inner side of the water replenishing device. The water supplementing assembly comprises an injection pipe used for supplementing bottom water or a nutrient solution in soil, the top of the seedling raising bin is provided with a water spraying pipe and a spraying head which are used for spraying and supplementing water for vegetable seedling raising, and one side of the water supplementing assembly is provided with a fixing column used for adjusting the spraying amount. The injection pipe is used for supplementing bottom water or a nutrient solution in soil, and meanwhile the fixing column is used for adjusting the bottom water or the spraying amount.

Description

Technical Field

[0001] The present invention relates to the field of modern agricultural technologies, and more specifically, to a water replenishing device for vegetable seedling cultivation. Background Art

[0002] Seedling cultivation means cultivating seedlings, which refers to cultivating seedlings in a nursery, hotbed or greenhouse for transplantation into the land for planting. Vegetable seedling cultivation, as a key link in agricultural production, is of great importance. During the growth process of vegetable seedlings, water management is particularly crucial, directly related to the survival rate, growth rate and quality of vegetable seedlings.

[0003] Chinese Publication No.: CN218353529U discloses a water replenishing device for vegetable seedling cultivation, including a seedling cultivation shell. Universal wheels are fixedly installed at the four corners of the bottom of the seedling cultivation shell. A fixed frame is fixedly connected to the top of the seedling cultivation shell. A placement groove is formed inside the fixed frame. A fixed bracket is fixedly connected inside the placement groove. The top inner wall of the fixed bracket is movably connected to a seedling cultivation base. Through holes are formed inside the seedling cultivation base. A protruding edge is fixedly connected to the top of the seedling cultivation base. In this patent, by setting a motor, the motor can drive the lifting component inside the seedling cultivation shell to move. The sealing plate in the lifting component squeezes the water source upward, so that the seedling cultivation base always remains in contact with the water source, preventing the vegetable in the seedling cultivation base from drying out and being damaged, solving the problems that the existing water replenishing device has large errors in manual water replenishment, resulting in waste of labor, and cannot accurately perform infiltration water replenishment, leading to too much or too little water in the vegetable seedling cultivation.

[0004] Although the above patent uses a lifting component to squeeze the water source upward, it can prevent the vegetables in the seedling cultivation base from drying out and being damaged, and solves the problems of large errors in manual water replenishment and waste of labor in the existing water replenishing device. However, considering that during the seedling cultivation process, while ensuring the development of seedlings, it is necessary to spray or inject nutrient solution for some seedlings with slow growth or slow germination. Moreover, it is also necessary to ensure the humidity of the soil and sufficient bottom water during the seedling cultivation process to ensure that the seedlings will not dry out.

[0005] In view of this, we propose a water replenishing device for vegetable seedling cultivation. Summary of the Invention

[0006] The purpose of the present invention is to provide a water replenishing device for vegetable seedling cultivation to solve the problems raised in the above background art.

[0007] To achieve the above object, the present invention provides a water replenishing device for vegetable seedling raising, including a seedling raising bin, in the middle of the inner side of the seedling raising bin, a water replenishing device is provided, inside the water replenishing device, a plurality of water replenishing components for replenishing water to vegetable seedlings are provided, the water replenishing components include injection pipes for replenishing bottom water or nutrient solution in the soil, on the top of the seedling raising bin, a water spraying pipe and a nozzle for spraying and replenishing water for vegetable seedling raising are provided, on one side of the water replenishing component, a fixed column for adjusting the spraying amount is provided, wherein:

[0008] By starting the water replenishing component, using the injection pipe to complete the replenishment of bottom water or nutrient solution in the soil, and at the same time using the fixed column to complete the adjustment of the bottom water or spraying amount.

[0009] Preferably, the water replenishing device is fixedly connected to the middle position of the seedling raising bin, on both sides inside the seedling raising bin, the water replenishing device is fixedly connected with a plurality of partition plates, on the peripheral top of the seedling raising bin, a plurality of columns are fixedly connected, on one side of each of the plurality of columns, a water spraying pipe is fixedly connected, and the bottom of the water spraying pipe communicates with a plurality of water spraying pipes.

[0010] Preferably, on one side of the seedling raising bin, a first water inlet is provided, on the side of the seedling raising bin far from the first water inlet, a second water inlet is provided, on both sides inside the water replenishing device, a first water storage tank and a second water storage tank are fixedly connected, the first water storage tank is communicated with the first water inlet, the second water storage tank is communicated with the second water inlet, wherein:

[0011] A cross plate is fixedly connected between the first water storage tank and the second water storage tank, and a plurality of touch sensors are arranged at the bottom of the cross plate.

[0012] Preferably, the water replenishing component includes a fixed frame, the top of the fixed frame is fixedly connected to the inner wall of the top of the water replenishing device, a square hole is provided on the outer wall of the fixed frame, a first sliding block is slidably connected in the square hole, a first spring is fixedly connected to the top of the first sliding block, and the end of the first spring far from the first sliding block is fixedly connected to the top of the square hole.

[0013] Preferably, a first connecting rod is rotatably connected to the end of the first sliding block far from the first spring, a second connecting rod is rotatably connected to the end of the first connecting rod far from the first sliding block, on both sides of the end of the second connecting rod far from the first connecting rod, a third connecting rod is fixedly connected, a limiting column is fixedly connected to the inside of the fixed frame, and the limiting column is arranged on both sides of the second connecting rod, wherein:

[0014] The second connecting rod and the third connecting rod are vertically distributed.

[0015] Preferably, a rotating column is provided at the bottom of the fixing frame. The bottom of the rotating column is fixedly connected to the bottom inner wall of the seedling cultivation bin. A strip-shaped groove is formed on the outer wall of the rotating column. A triangular protrusion is fixedly connected to the top of the rotating column. The triangular protrusion and the protruding block are on the same arc vertical plane.

[0016] Preferably, the strip-shaped groove is integrally in a circular closed-loop shape, and the middle end of the shape of the strip-shaped groove is on the same vertical line as the protruding block.

[0017] Preferably, two-way piston rods are provided at the ends of the two No. 3 connecting rods away from the No. 2 connecting rod. The No. 3 connecting rod is movably connected to the connection on one side of the two-way piston rod. A lower piston body is provided at the lower end of the two-way piston rod. The two-way piston rod is slidably connected to the inner side of the lower piston body. An upper piston body is provided at the upper end of the two-way piston rod. The two-way piston rod is slidably connected to the inner side of the upper piston body.

[0018] Preferably, the lower piston body is communicated with a No. 1 communication pipe. Multiple lower piston bodies are communicated through the No. 1 communication pipe. The lower piston body is communicated with the No. 2 water storage tank through the No. 1 communication pipe. The upper piston body is communicated with a No. 2 communication pipe. Multiple upper piston bodies are communicated with each other through the No. 2 communication pipe. A bent pipe is communicated with the side of the upper piston body. The upper piston body is communicated with the No. 1 water storage tank through the bent pipe, where:

[0019] The top of the upper piston body is communicated with a water spraying pipe.

[0020] Preferably, an arched hole is formed on the outer wall of the fixed column. A No. 2 sliding block is slidably connected to the inner side of the fixed column. Protruding columns are fixedly connected to both sides of the No. 2 sliding block. The diameter of the protruding column fits the width of the strip-shaped groove. A No. 2 spring is fixedly connected to the bottom of the No. 2 sliding block. The No. 2 spring is fixedly connected to the bottom inner wall of the fixed column at the end away from the No. 2 sliding block.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1. In this vegetable seedling cultivation water replenishing device, the staff fills the two seedling cultivation bins on both sides of the water replenishing device with soil for seedling cultivation, and then sows seeds according to the stratification of the partition board. The high-pressure pump is used to fill the No. 1 water storage tank and the No. 2 water storage tank with water or medicine, and it passes through each pipeline. During the seedling cultivation process, the injection pipe injects bottom water into the soil to ensure that the soil is moist, and the nozzles at the bottom of the water spraying pipe are regularly used to replenish water to the seeds or seedlings at regular intervals under the control of the control room.

[0023] 2. In the water replenishing device for vegetable seedling raising, when the rotating column 26 rotates to drive the triangular projection 262 to rotate, when the triangular projection 262 rotates to the bottom of the raised block 251, it will push the raised block 251 upward. At this time, the third connecting rod 25 tilts upward on this side and drives the double-acting piston rod 27 on this side to slide upward together, increasing the water output of the water spraying pipe 131. Similarly, the water output of the injection pipe 282 in the soil becomes smaller under the action of the lower piston body 28. After the triangular projection 262 passes the raised block 251, under the action of the first spring 212, the first sliding block 22 is pulled upward, and the first connecting rod 23 and the second connecting rod 24 are pulled to restore the third connecting rod 25 to the horizontal direction, so that the water output in the water spraying pipe 131 and the injection pipe 282 returns to the original state again. This can ensure that during the process of water replenishment and nutrient solution injection, the seedlings will not be drowned due to the simultaneous increase in water volume on both sides. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is an overall three-dimensional schematic diagram of the water replenishing device for vegetable seedling raising of the present invention;

[0025] Figure 2 is a transverse cross-sectional schematic diagram of the water replenishing device for vegetable seedling raising of the present invention;

[0026] Figure 3 is a longitudinal cross-sectional schematic diagram of the water replenishing device for vegetable seedling raising of the present invention;

[0027] Figure 4 is an internal schematic diagram of the water replenishing device of the water replenishing device for vegetable seedling raising of the present invention;

[0028] Figure 5 is a three-dimensional schematic diagram of the water replenishing device of the water replenishing device for vegetable seedling raising of the present invention;

[0029] Figure 6 is a three-dimensional schematic diagram of the connection of various pipelines of the water replenishing device for vegetable seedling raising of the present invention;

[0030] Figure 7 is a three-dimensional schematic diagram of the water replenishing component of the water replenishing device for vegetable seedling raising of the present invention;

[0031] Figure 8 is an unfolded three-dimensional schematic diagram of the water replenishing component of the water replenishing device for vegetable seedling raising of the present invention;

[0032] The meanings of the various reference numerals in the figures are as follows:

[0033] 1. Seedling raising bin; 11. Water replenishing device; 111. First water storage tank; 112. Second water storage tank; 113. Horizontal plate; 12. Partition board; 13. Column; 131. Sprinkler pipe; 1311. Sprinkler head; 14. First water inlet; 15. Second water inlet; 2. Water replenishing component; 21. Fixed frame; 211. Square hole; 212. First spring; 213. Limit post; 22. First sliding block; 23. First connecting rod; 24. Second connecting rod; 25. Third connecting rod; 251. Protruding block; 26. Rotating column; 261. Strip-shaped groove; 262. Triangular protruding part; 27. Double-acting piston rod; 28. Lower piston body; 281. First connecting pipe; 282. Injection pipe; 29. Upper piston body; 291. Second connecting pipe; 292. Bent pipe;

[0034] 3. Fixed column; 31. Arch-shaped hole; 32. Second sliding block; 33. Protruding column; 34. Second spring. Specific implementation mode

[0035] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0036] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0037] Embodiment 1

[0038] Please refer to Figures 1 - 8As shown in the figure, this embodiment provides a water replenishing device for vegetable seedling raising, which includes a seedling raising bin 1. In the middle of the inner side of the seedling raising bin 1, a water replenishing device 11 is arranged. Inside the water replenishing device 11, a plurality of water replenishing components 2 for replenishing water to vegetable seedlings are arranged. The water replenishing component 2 includes an injection pipe 282 for replenishing bottom water or nutrient solution in the soil. At the top of the seedling raising bin 1, a water spraying pipe 131 and a nozzle 1311 for spraying and replenishing water for vegetable seedling raising are arranged. On one side of the water replenishing component 2, a fixed column 3 for adjusting the spraying amount is arranged, where: by starting the water replenishing component 2, the injection pipe 282 is used to complete the replenishment of bottom water or nutrient solution in the soil, and at the same time, the fixed column 3 is used to adjust the bottom water or spraying amount.

[0039] As Figures 3 - 6 shown, the water replenishing device 11 is fixedly connected to the middle position of the seedling raising bin 1. A plurality of partition plates 12 are fixedly connected to both sides inside the seedling raising bin 1 by the water replenishing device 11. A plurality of upright columns 13 are fixedly connected to the peripheral top of the seedling raising bin 1. On one side of each of the plurality of upright columns 13, a water spraying pipe 131 is fixedly connected. The bottom of the water spraying pipe 131 is communicated with a plurality of water spraying pipes 131. On one side of the seedling raising bin 1, a first water inlet 14 is opened. On the side of the seedling raising bin 1 far from the first water inlet 14, a second water inlet 15 is opened. On both sides inside the water replenishing device 11, a first water storage tank 111 and a second water storage tank 112 are fixedly connected. The first water storage tank 111 is communicated with the first water inlet 14, and the second water storage tank 112 is communicated with the second water inlet 15, where: a cross plate 113 is fixedly connected between the first water storage tank 111 and the second water storage tank 112, and a plurality of touch sensors are arranged at the bottom of the cross plate 113.

[0040] As Figures 6 - 8 shown, the water replenishing component 2 includes a fixing frame 21. The top of the fixing frame 21 is fixedly connected to the inner top wall of the water replenishing device 11. A square hole 211 is opened on the outer wall of the fixing frame 21. A first sliding block 22 is slidably connected in the square hole 211. A first spring 212 is fixedly connected to the top of the first sliding block 22. One end of the first spring 212 far from the first sliding block 22 is fixedly connected to the top of the square hole 211. One end of the first sliding block 22 far from the first spring 212 is rotatably connected to a first connecting rod 23. One end of the first connecting rod 23 far from the first sliding block 22 is rotatably connected to a second connecting rod 24. On both sides of one end of the second connecting rod 24 far from the first connecting rod 23, a third connecting rod 25 is fixedly connected. A limiting column 213 is fixedly connected to the inner side of the fixing frame 21, and the limiting column 213 is arranged on both sides of the second connecting rod 24, where: the second connecting rod 24 and the third connecting rod 25 are vertically distributed.

[0041] As Figure 8As shown in the figure, a rotating column 26 is provided at the bottom of the fixing frame 21. The bottom of the rotating column 26 is fixedly connected to the bottom inner wall of the seedling-raising bin 1. A strip-shaped groove 261 is formed on the outer wall of the rotating column 26. A triangular protrusion 262 is fixedly connected to the top of the rotating column 26. The triangular protrusion 262 and the protrusion block 251 are on the same arc vertical plane. The strip-shaped groove 261 is in an overall circular closed-loop shape. The middle end of the shape of the strip-shaped groove 261 and the protrusion block 251 are on the same vertical line. At the ends of both sides of the third connecting rod 25 away from the second connecting rod 24, a double-acting piston rod 27 is provided. The third connecting rod 25 is movably connected to the connection on one side of the double-acting piston rod 27. A lower piston body 28 is provided at the lower end of the double-acting piston rod 27. The double-acting piston rod 27 is slidably connected to the inner side of the lower piston body 28. An upper piston body 29 is provided at the upper end of the double-acting piston rod 27. The double-acting piston rod 27 is slidably connected to the inner side of the upper piston body 29. The lower piston body 28 is communicated with a first communication pipe 281. Multiple lower piston bodies 28 are communicated through the first communication pipe 281. The lower piston body 28 is communicated with the second water storage tank 112 through the first communication pipe 281. The upper piston body 29 is communicated with a second communication pipe 291. Multiple upper piston bodies 29 are communicated with each other through the second communication pipe 291. A bent pipe 292 is communicated with the side of the upper piston body 29. The upper piston body 29 is communicated with the first water storage tank 111 through the bent pipe 292. Among them: the top of the upper piston body 29 is communicated with the water spraying pipe 131.

[0042] For this explanation, a connecting seat is fixedly provided on the side of the double-acting piston rod 27 close to the third connecting rod 25. A pin shaft is rotatably provided inside the connecting seat. The end of the third connecting rod 25 penetrates and is provided with a strip-shaped groove, and the pin shaft passes through the strip-shaped groove, so that the pin shaft can move in the strip-shaped groove.

[0043] As Figure 8 shown, an arched hole 31 is formed on the outer wall of the fixed column 3. A second sliding block 32 is slidably connected to the inside of the fixed column 3. Two protruding columns 33 are fixedly connected to both sides of the second sliding block 32. The diameter of the protruding column 33 fits the width of the strip-shaped groove 261. A second spring 34 is fixedly connected to the bottom of the second sliding block 32. The end of the second spring 34 away from the second sliding block 32 is fixedly connected to the bottom inner wall of the fixed column 3.

[0044] It can be seen from this that when water needs to be replenished during the vegetable seedling-raising process, as Figures 5 - 6As shown, the staff fill the nursery trays 1 on both sides of the water replenishing device 11 with soil for seedling cultivation, and then sow seeds according to the layering of the partition board 12. The high-pressure pumps outside the first water inlet 14 and the second water inlet 15 are used to fill the first water storage tank 111 and the second water storage tank 112 with water or liquid medicine, and the water or liquid medicine is transported to the injection pipe 282 and the water spraying pipe 131 through the upper piston body 29, the lower piston body 28, the first connecting pipe 281 and the second connecting pipe 291. During the seedling cultivation process, the injection pipe 282 injects bottom water into the soil to ensure that the soil is moist, and the bottom nozzle 1311 of the water spraying pipe 131 regularly replenishes water for the seeds or seedlings at regular intervals under the control of the control room;

[0045] At this time, during the water replenishing process, when it is necessary to adjust the water replenishing amount, as Figures 7 - 8 shown, driven by a motor outside the inner side of the bottom of the nursery tray 1, the rotating column 26 rotates. During the rotation of the rotating column 26, the triangular protrusion 262 at its top will rotate. When the triangular protrusion 262 rotates to the bottom of the protruding block 251, the triangular protrusion 262 will push the protruding block 251 upward. At this time, the third connecting rod 25 tilts to this side. At the same time, a small distance slides inside the connection on one side of the double-acting piston rod 27 away from the double-acting piston rod 27, and drives the double-acting piston rod 27 on this side to slide upward together, while the double-acting piston rod 27 on the other side droops downward under the pry. At this time, the double-acting piston rod 27 squeezes the upper piston body 29, increasing the water pressure in the water spraying pipe 131. At this time, the water output of the water spraying pipe 131 increases. Similarly, the water output of the injection pipe 282 in the soil becomes smaller under the action of the lower piston body 28. After the triangular protrusion 262 passes the protruding block 251, the first sliding block 22 is pulled upward by the first spring 212, and the first connecting rod 23 and the second connecting rod 24 are pulled to restore the third connecting rod 25 to the horizontal direction, so that the water output in the water spraying pipe 131 and the injection pipe 282 returns to the original state again. This can ensure that during the water replenishing and nutrient solution injection processes, the seedlings will not be drowned due to the simultaneous increase in water volume on both sides;

[0046] In addition, the first water storage tank 111 and the second water storage tank 112 connected to the water spraying pipe 131 and the injection pipe 282 can replenish water or nutrient solution by spraying or injection methods, and the two can be switched and used at will.

[0047] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present invention and do not limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A water replenishing device for vegetable seedling cultivation, comprising a seedling cultivation chamber (1), characterized in that: A water replenishment device (11) is provided in the middle of the inner side of the seedling raising bin (1), and a plurality of water replenishment components (2) for replenishing water to the vegetable seedlings are provided inside the water replenishment device (11), and the water replenishment components (2) include injection tubes (282) for replenishing bottom water or nutrient solution in the soil, and a water spraying pipe (131) and a spray head (1311) for spraying water to the vegetable seedlings are provided at the top of the seedling raising bin (1), and a fixed column (3) for adjusting the spraying amount is provided on one side of the water replenishment component (2), wherein: By starting the water replenishment component (2), the injection tube (282) is used to replenish the bottom water or nutrient solution in the soil, and the fixed column (3) is used to adjust the bottom water or spraying amount.

2. A water replenishing device for vegetable seedling cultivation according to claim 1, characterized in that: The water replenishing device (11) is fixedly connected to the middle position of the seedling raising bin (1); the water replenishing device (11) is fixedly connected to a plurality of partitions (12) on both sides inside the seedling raising bin (1); a plurality of columns (13) are fixedly connected to the top of the periphery of the seedling raising bin (1); one side of each of the plurality of columns (13) is fixedly connected to a water spray pipe (131); and the bottom of the water spray pipe (131) is connected to a plurality of water spray pipes (131).

3. A water replenishing device for raising vegetable seedlings according to claim 2, characterized in that: A first water inlet (14) is provided on one side of the seedling raising warehouse (1), and a second water inlet (15) is provided on a side of the seedling raising warehouse (1) away from the first water inlet (14). A first water storage tank (111) and a second water storage tank (112) are fixedly connected to the two sides of the water replenishment device (11), the first water storage tank (111) is connected to the first water inlet (14), and the second water storage tank (112) is connected to the second water inlet (15), wherein: A transverse plate (113) is fixedly connected between the first water storage tank (111) and the second water storage tank (112), and a plurality of touch sensors are arranged at the bottom of the transverse plate (113).

4. A water replenishing device for raising vegetable seedlings according to claim 3, characterized in that: The water replenishment component (2) comprises a fixing frame (21), the top of the fixing frame (21) is fixedly connected to the top inner wall of the water replenishment device (11), the outer wall of the fixing frame (21) is provided with a square hole (211), a first sliding block (22) is slidably connected in the square hole (211), a first spring (212) is fixedly connected to the top of the first sliding block (22), and the first spring (212) is fixedly connected to the top of the square hole (211) at one end away from the first sliding block (22).

5. A water replenishing device for raising vegetable seedlings according to claim 4, characterized in that: The first sliding block (22) is rotatably connected to a first connecting rod (23) at one end away from the first spring (212), the first connecting rod (23) is rotatably connected to a second connecting rod (24) at one end away from the first sliding block (22), the second connecting rod (24) is fixedly connected to a third connecting rod (25) on both sides of one end away from the first connecting rod (23), the inner side of the fixed frame (21) is fixedly connected to a limiting column (213), and the limiting column (213) is arranged at two sides of the second connecting rod (24), wherein: The second connecting rod (24) and the third connecting rod (25) are vertically distributed.

6. A water replenishing device for raising vegetable seedlings according to claim 5, characterized in that: A rotating column (26) is provided at the bottom of the fixed frame (21); the bottom of the rotating column (26) is fixedly connected to the bottom inner wall of the seedling raising chamber (1); the outer wall of the rotating column (26) is provided with a strip groove (261); the top of the rotating column (26) is fixedly connected to a triangular protrusion (262); the triangular protrusion (262) and the protrusion block (251) are on the same arc-shaped vertical plane.

7. A water replenishing device for raising vegetable seedlings according to claim 6, characterized in that: The strip groove (261) is in the shape of a circular closed loop Z as a whole, and the Z-shaped middle end of the strip groove (261) is on the same vertical line as the protruding block (251).

8. A water replenishing device for raising vegetable seedlings according to claim 7, characterized in that: The No. 3 connecting rod (25) on both sides is provided with a bidirectional piston rod (27) at one end away from the No. 2 connecting rod (24); the No. 3 connecting rod (25) is movably connected to the connection on one side of the bidirectional piston rod (27); the lower end of the bidirectional piston rod (27) is provided with a lower piston body (28); the bidirectional piston rod (27) is slidably connected to the inner side of the lower piston body (28); the upper end of the bidirectional piston rod (27) is provided with an upper piston body (29); the bidirectional piston rod (27) is slidably connected to the inner side of the upper piston body (29).

9. A water replenishing device for raising vegetable seedlings according to claim 8, characterized in that: The lower piston body (28) is connected to a No. 1 connecting pipe (281), and a plurality of the lower piston bodies (28) are connected to each other through the No. 1 connecting pipe (281). The lower piston body (28) is connected to a No. 2 water storage tank (112) through the No. 1 connecting pipe (281). The upper piston body (29) is connected to a No. 2 connecting pipe (291), and a plurality of the upper piston bodies (29) are connected to each other through the No. 2 connecting pipe (291). The side of the upper piston body (29) is connected to a bent pipe (292), and the upper piston body (29) is connected to the No. 1 water storage tank (111) through the bent pipe (292), wherein: The top of the upper piston body (29) is connected to the water spray pipe (131).

10. A water replenishing device for raising vegetable seedlings according to claim 9, characterized in that: The outer wall of the fixed column (3) is provided with an arched hole (31), the inner side of the fixed column (3) is slidably connected to a No. 2 sliding block (32), both sides of the No. 2 sliding block (32) are fixedly connected to protruding columns (33), the diameter of the protruding columns (33) matches the width of the strip groove (261), the bottom of the No. 2 sliding block (32) is fixedly connected to a No. 2 spring (34), and the No. 2 spring (34) is fixedly connected to the bottom inner wall of the fixed column (3) at one end away from the No. 2 sliding block (32).

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