Energy-saving hydroponic vegetable planting seedling device

Abstract

This invention relates to the field of vegetable seedling technology, and more particularly to an energy-saving seedling device for hydroponic vegetable cultivation. The device includes a cultivation plate with cultivation holes for the roots of hydroponic vegetables to pass through. It also includes a support column and a support plate. Both sides of the hydroponic pool and the cultivation plate are slidably connected to the outer side of the support column via connecting ears. The front ends of both the hydroponic pool and the cultivation plate have grooves, and sliders are slidably connected to the inner side of the grooves. The front ends of the sliders on the hydroponic pool and the sliders on the cultivation plate are rotatably connected to the same L-shaped plate via a rotating shaft. In the initial position, the L-shaped plate can rotate around the rotating column. The two ends of the L-shaped plate form a lever mechanism around the rotating column. When the hydroponic pool descends, the cultivation plate rises relatively under the action of the lever mechanism. By changing the position of the rotating column in the initial position, the ratio between the power arm and the resistance arm at both ends can be changed when the hydroponic pool descends, thus changing the rise of the cultivation plate.

Description

Technical Field

[0001] This invention relates to the field of vegetable seedling technology, specifically to an energy-saving seedling device for hydroponic vegetable cultivation. Background Technology

[0002] Hydroponic vegetables refer to vegetables whose roots grow in a nutrient solution. Hydroponic vegetables are characterized by a short growth cycle and are rich in a variety of vitamins and minerals essential to the human body.

[0003] Application number 202210704710.7 discloses a water-saving hydroponic vegetable seedling device that promotes root density and addresses the problem of not being able to adjust the length of hydroponic vegetable roots submerged in the nutrient solution. The device includes a liquid storage box with a position adjustment mechanism, a height adjustment mechanism above the position adjustment mechanism, and a liquid circulation and collection mechanism below the position adjustment mechanism. This invention achieves half of the vegetable roots being submerged in the nutrient solution through the height adjustment mechanism.

[0004] However, different vegetables have different root-to-stem ratios (1a / 1b), such as Figure 1 As shown, the roots of hydroponically grown vegetables need to be half submerged in the nutrient solution and the other half exposed to the air, such as... Figure 2 As shown, only by providing the best environment for vegetable growth can existing seedling devices be made flexible and automatic according to different types of hydroponic vegetables. This invention uses the weight of the nutrient solution as a driving force, combined with the variety of vegetables and the seedling cycle, to automatically adjust the height of the vegetable roots in the nutrient solution.

[0005] Meanwhile, existing hydroponic vegetable seedling raising devices cannot ensure that vegetables are in the same nutrient solution concentration, which can easily lead to inconsistent growth of the same batch of hydroponic vegetables. Therefore, an energy-saving hydroponic vegetable seedling raising device is proposed to address the above problems. Summary of the Invention

[0006] The purpose of this invention is to provide an energy-saving seedling device for hydroponic vegetable cultivation. It can automatically adjust the height of vegetable roots in the nutrient solution by using the weight of the nutrient solution as a power source, combined with the vegetable variety and seedling cycle. It can also ensure that vegetables of the same batch are in the same nutrient solution concentration, thus ensuring that the hydroponic vegetables of the same batch grow uniformly.

[0007] To achieve the above objectives, the present invention provides the following technical solution: an energy-saving seedling raising device for hydroponic vegetable cultivation, comprising a hydroponic tank and a culture plate, wherein the hydroponic tank is disposed on the lower side of the culture plate, and the culture plate is provided with culture holes for the roots of hydroponic vegetables to pass through;

[0008] The seedling device also includes a support column and a support plate. Both sides of the hydroponic pool and the culture plate are slidably connected to the outside of the support column through connecting ears. The front end of the hydroponic pool and the culture plate are provided with a sliding groove. A slider is slidably connected to the inside of the sliding groove. The front ends of the slider on the hydroponic pool and the slider on the culture plate are rotatably connected to the same L-shaped plate through a rotating shaft.

[0009] The top of the support plate is fixedly connected to a horizontal plate. Both the horizontal plate and the L-shaped plate have several horizontally placed through holes on their inner sides. In the initial position, the through holes on the horizontal plate and the through holes on the L-shaped plate correspond to each other. The rotating column is inserted into one of the several horizontally placed through holes, and the rotating column is simultaneously in the through holes on both the horizontal plate and the L-shaped plate.

[0010] In the initial position, the L-shaped plate can rotate around the rotating column. When the hydroponic tank descends, the cultivation plate will rise relatively. By changing the position of the rotating column in the initial position, the rise of the cultivation plate when the hydroponic tank descends can be changed, which can be used to match hydroponic vegetables with different root-to-stem ratios.

[0011] Under the above settings, the present invention can use the weight of the nutrient solution as a power source, combined with the variety of vegetables and the seedling cycle, to automatically and reasonably adjust the height of the vegetable roots in the nutrient solution. In the initial position, the L-shaped plate can rotate around the rotating column. The two ends of the L-shaped plate form a lever mechanism around the rotating column. When the hydroponic pool descends, the cultivation plate will rise relatively under the action of the lever mechanism. By changing the position of the rotating column in the initial position, the ratio between the power arm and the resistance arm at both ends can be changed when the hydroponic pool descends, thereby changing the rising amplitude of the cultivation plate. This can be used to match hydroponic vegetables with different root-to-stem ratios, such as hydroponic vegetables with very long roots or hydroponic vegetables with very short roots, so that during the seedling process, about half of the roots of different hydroponic vegetables are in the nutrient solution and half are in the air, providing the best environment for vegetable growth.

[0012] The further to the right the rotating column is positioned, the less resistance arm there is, and the less sensitive the culture plate will be to rising when the hydroponic tank descends. The further to the left the rotating column is positioned, the more resistance arm there is, and the more sensitive the culture plate will be to rising when the hydroponic tank descends.

[0013] When using this invention, temporary support can be provided by an external temporary support frame during the adjustment of the rotating column position.

[0014] Preferably, as an energy-saving seedling raising device for hydroponic vegetable cultivation according to the present invention, the seedling raising device further includes an outer cylinder, a second piston is fixedly connected to the inner side of the outer cylinder, an inner cylinder is fixedly connected to the top of the second piston, the top of the inner cylinder is fixedly connected to the bottom of the hydroponic pool, and is used to realize the movable support of the hydroponic pool. A connection hole is opened at the top of the outer cylinder, and hydraulic oil is filled below the second piston on the inner side of the outer cylinder.

[0015] Under the above configuration, the inner side of the outer cylinder is filled with hydraulic oil below the second piston. When there is no flow outlet for the hydraulic oil, the height of the hydroponic tank will not decrease. When there is a flow outlet for the hydraulic oil, the height of the hydroponic tank will decrease.

[0016] Preferably, in this invention, an energy-saving seedling device for hydroponic vegetable cultivation is provided, wherein a side cylinder is fixedly connected to the bottom end of the outer cylinder, a first piston is slidably connected to the inner side of the side cylinder, a spring is provided on the inner side of the side cylinder, the spring is used to achieve the function of resetting, the two ends of the spring are fixedly connected to the inner side of one end of the side cylinder and one side of the first piston, respectively, and the inner side of one end of the side cylinder is connected to the inner side of the bottom end of the outer cylinder through a flow control valve;

[0017] When the flow control valve is fully closed, the outer and inner cylinders provide complete support for the hydroponic tank.

[0018] After the flow control valve opens and closes, the hydraulic oil in the outer cylinder will enter the side cylinder under the action of gravity to compensate, and the hydroponic tank will slowly descend. By changing the degree of opening and closing of the flow control valve, the descent cycle of the hydroponic tank can be changed to match hydroponic vegetables with different seedling cycles.

[0019] As a preferred embodiment of the energy-saving hydroponic vegetable cultivation seedling device of the present invention, a one-way reflux valve is fixedly connected to the inner side of one end of the side cylinder, and the hydraulic oil in the side cylinder can be refluxed through the one-way reflux valve.

[0020] The one-way reflux valve is designed to increase the reflux area and facilitate the repositioning of the hydroponic tank.

[0021] As a preferred embodiment of the energy-saving hydroponic vegetable cultivation seedling device of the present invention, a connecting cylinder is fixedly connected to one side of the hydroponic pool, and the inner side of one end of the connecting cylinder is connected to the inner side of the hydroponic pool through an opening. A sliding plate is slidably connected to the inner side of the connecting cylinder, and the flow and compensation of nutrient solution in the hydroponic pool can be realized by the sliding of the sliding plate.

[0022] As a preferred embodiment of the energy-saving hydroponic vegetable cultivation seedling device of the present invention, a level gauge is fixedly installed on the inner side of the hydroponic pool to obtain the height of the nutrient solution in the hydroponic pool.

[0023] Under the above configuration, the present invention has a level gauge fixedly installed on the inner side of the hydroponic tank. The level gauge is used to obtain the height of the nutrient solution in the hydroponic tank. When the nutrient solution drops, the slide can be moved towards the hydroponic tank to compensate for the nutrient solution. The concentration of the nutrient solution in the connecting cylinder can be set very high to achieve the function of nutrient solution concentration compensation.

[0024] At the same time, when the slide plate reciprocates in the connecting cylinder, it can make the liquid in the hydroponic tank flow continuously, thereby increasing the uniformity of the nutrient solution in the hydroponic tank, ensuring that the vegetables are in the same nutrient solution concentration, and ensuring that the same batch of hydroponic vegetables grows uniformly.

[0025] Preferably, in this invention, an energy-saving seedling device for hydroponic vegetable cultivation is provided, in which a screw is rotatably connected to the inner side of the connecting cylinder, the inner side of the screw is spirally connected to the inner side of the sliding plate, a limiting rod is fixedly connected to one side of the sliding plate, and the limiting rod is slidably connected to the inner side of one end of the connecting cylinder.

[0026] In a preferred embodiment of the energy-saving hydroponic vegetable cultivation device of the present invention, a motor is fixedly connected to one end of the connecting cylinder, and the end of the motor's main shaft is fixedly connected to one end of the screw, thereby realizing the left and right movement of the slide plate by the forward and reverse rotation of the motor.

[0027] With the above setup, when the motor rotates, it will drive the screw to rotate, and the rotation of the screw will force the slide to move to the left or right.

[0028] In a preferred embodiment of the energy-saving hydroponic vegetable cultivation device of the present invention, a sensing block is fixedly connected to one end of the connecting cylinder, and a potentiometer (not shown in the figure) is fixedly connected to the upper side of the limiting rod. The potentiometer is slidably connected to the sensing block to obtain the position of the sliding plate inside the connecting cylinder.

[0029] After determining the position of the skateboard inside the connecting cylinder, precise nutrient solution compensation can be achieved.

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

[0031] 1. This energy-saving seedling device for hydroponic vegetable cultivation, in its initial position, features an L-shaped plate that can rotate around a rotating column. As the hydroponic tank descends, the cultivation plate rises relatively. By changing the position of the rotating column in the initial position, the rise of the cultivation plate during the descent of the hydroponic tank can be altered, thus adapting to hydroponic vegetables with different root-to-stem ratios. This invention utilizes the weight of the nutrient solution as a driving force, combined with the vegetable variety and seedling cycle, to automatically and rationally adjust the height of the vegetable roots in the nutrient solution. In this invention, in the initial position, the L-shaped plate can rotate around the rotating column... The L-shaped plate rotates, forming a lever mechanism with the rotating column at both ends. When the hydroponic tank descends, the cultivation plate rises relatively under the action of the lever mechanism. By changing the position of the rotating column at the initial position, the ratio between the power arm and the resistance arm at both ends can be changed when the hydroponic tank descends, thus changing the rise of the cultivation plate. This can be used to match hydroponic vegetables with different root-to-stem ratios, such as hydroponic vegetables with very long roots or hydroponic vegetables with very short roots. This ensures that during the seedling process, about half of the roots of different hydroponic vegetables are in the nutrient solution and half are in the air, providing the best environment for vegetable growth.

[0032] 2. In this energy-saving seedling device for hydroponic vegetable cultivation, the more the rotating column is positioned to the right, the less resistance arm there is, and the lower the sensitivity of the culture plate to rising when the hydroponic tank descends. Conversely, the more the rotating column is positioned to the left, the more resistance arm there is, and the higher the sensitivity of the culture plate to rising when the hydroponic tank descends. When using this invention, a temporary external support frame can be used to provide temporary support during the adjustment of the rotating column position.

[0033] 3. This energy-saving seedling device for hydroponic vegetable cultivation has an outer cylinder filled with hydraulic oil below the second piston. When there is no flow outlet for the hydraulic oil, the height of the hydroponic tank will not decrease. When there is a flow outlet for the hydraulic oil, the height of the hydroponic tank will decrease. When the flow control valve is completely closed, the outer and inner cylinders provide complete support for the hydroponic tank. After the flow control valve opens and closes, the hydraulic oil in the outer cylinder will enter the side cylinder under the action of gravity for compensation, and the hydroponic tank will slowly descend. By changing the opening and closing degree of the flow control valve, the descent cycle of the hydroponic tank can be changed to match hydroponic vegetables with different seedling cycles. The one-way return valve is set to increase the return area and facilitate the repositioning of the hydroponic tank.

[0034] 4. This invention relates to an energy-saving seedling device for hydroponic vegetable cultivation. A level gauge is fixedly installed inside the hydroponic tank to obtain the height of the nutrient solution in the tank. When the nutrient solution level drops, a sliding plate can move towards the hydroponic tank to compensate for the nutrient solution level. The concentration of the nutrient solution in the connecting cylinder can be set very high to achieve nutrient solution concentration compensation. Simultaneously, the reciprocating motion of the sliding plate in the connecting cylinder creates a continuous flow of liquid in the hydroponic tank, thereby increasing the uniformity of the nutrient solution and ensuring that the vegetables are in the same nutrient solution concentration, guaranteeing consistent growth of the same batch of hydroponic vegetables. After obtaining the position of the sliding plate within the connecting cylinder, a potentiometer can achieve precise nutrient solution compensation. Attached Figure Description

[0035] Figure 1 A schematic diagram of the existing root-to-stem ratio in hydroponically grown vegetables;

[0036] Figure 2 This is a schematic diagram illustrating the desired effect of the present invention during the seedling stage;

[0037] Figure 3 This is a schematic diagram of the overall appearance and structure of the present invention;

[0038] Figure 4 This is a schematic diagram of the overall cross-sectional installation structure of the present invention;

[0039] Figure 5 For the present invention Figure 4 A schematic diagram of the structure at point A;

[0040] Figure 6 For the present invention Figure 4 A schematic diagram of the structure at point B;

[0041] Figure 7 This is a further structural schematic diagram of the hydroponic tank of the present invention;

[0042] Figure 8 For the present invention Figure 7 A schematic diagram of the structure at point C;

[0043] Figure 9 For the present invention Figure 7 A schematic diagram of the structure at point D.

[0044] In the picture: 1. Hydroponic vegetables; 1a. Stem; 1b. Root; 2. Hydroponic pond; 3. Culture plate;

[0045] 3a. Culture well; 4. Support column; 5. Support plate; 6. Horizontal plate; 7. Rotating column; 8. L-shaped plate; 9. Outer cylinder; 10. Side cylinder; 11. Inner cylinder; 12. Through hole; 13. Slide groove; 14. Sliding block; 15. First piston; 16. Spring; 17. Flow control valve; 18. One-way reflux valve; 19. Connecting hole; 20. Second piston; 21. Connecting cylinder; 22. Level gauge; 23. Sensing block; 24. Limiting rod; 25. Motor; 26. Screw; 27. Slide plate; 28. Opening. Detailed Implementation

[0046] 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.

[0047] Example 1, please refer to Figure 1-6 The present invention provides a technical solution: an energy-saving seedling device for hydroponic vegetable cultivation, including a hydroponic pool 2 and a cultivation plate 3. The hydroponic pool 2 is located on the lower side of the cultivation plate 3, and the cultivation plate 3 has cultivation holes 3a for a hydroponic vegetable 1b to pass through.

[0048] The seedling device also includes a support column 4 and a support plate 5. Both sides of the hydroponic pool 2 and the culture plate 3 are slidably connected to the outside of the support column 4 through connecting ears. The front end of the hydroponic pool 2 and the culture plate 3 are provided with a sliding groove 13. A slider 14 is slidably connected to the inside of the sliding groove 13. The front ends of the slider 14 on the hydroponic pool 2 and the slider 14 on the culture plate 3 are rotatably connected to the same L-shaped plate 8 through a rotating shaft.

[0049] A horizontal plate 6 is fixedly connected to the top of the support plate 5. Several horizontal through holes 12 are opened on the inner side of both the horizontal plate 6 and the L-shaped plate 8. In the initial position, the through holes 12 on the horizontal plate 6 and the through holes 12 on the L-shaped plate 8 correspond to each other. The rotating column 7 is inserted into one of the several horizontal through holes 12, and the rotating column 7 is simultaneously in the through holes 12 on both the horizontal plate 6 and the L-shaped plate 8.

[0050] In the initial position, the L-shaped plate 8 can rotate around the rotating column 7. When the hydroponic pool 2 descends, the culture plate 3 will rise relatively. By changing the position of the rotating column 7 in the initial position, the rise of the culture plate 3 when the hydroponic pool 2 descends can be changed, which is used to match hydroponic vegetables 1 with different root-to-stem ratios.

[0051] Under the above settings, the present invention can use the weight of the nutrient solution as a power source, combined with the variety of vegetables and the seedling cycle, to automatically and reasonably adjust the height of the vegetable roots in the nutrient solution. In the initial position, the L-shaped plate 8 can rotate around the rotating column 7. The two ends of the L-shaped plate 8 form a lever mechanism around the rotating column 7. When the hydroponic pool 2 descends, the cultivation plate 3 will rise relatively under the action of the lever mechanism. By changing the position of the rotating column 7 in the initial position, the ratio between the power arm and the resistance arm at both ends can be changed when the hydroponic pool 2 descends, thereby changing the rising amplitude of the cultivation plate 3. This can be used to match hydroponic vegetables 1 with different root-to-stem ratios, such as hydroponic vegetables 1 with very long roots 1b or hydroponic vegetables 1 with very short roots 1b, so that during the seedling process, about half of the roots 1b of different hydroponic vegetables 1 are in the nutrient solution and half are in the air, providing the best environment for vegetable growth.

[0052] The more right the rotating column 7 is, the less resistance arm there is. When the hydroponic tank 2 descends, the less sensitive the culture plate 3 is to rise. The more left the rotating column 7 is, the more resistance arm there is when the hydroponic tank 2 descends, and the more sensitive the culture plate 3 is to rise.

[0053] When using this invention, temporary support can be provided by an external temporary support frame during the process of adjusting the position of the rotating column 7.

[0054] Specifically, the seedling device also includes an outer cylinder 9, a second piston 20 is fixedly connected to the inner side of the outer cylinder 9, an inner cylinder 11 is fixedly connected to the top of the second piston 20, the top of the inner cylinder 11 is fixedly connected to the bottom of the hydroponic pool 2, and is used to realize the movable support of the hydroponic pool 2. A connection hole 19 is opened at the top of the outer cylinder 9, and hydraulic oil is filled below the second piston 20 on the inner side of the outer cylinder 9.

[0055] Under the above configuration, the inner side of the outer cylinder 9 is filled with hydraulic oil below the second piston 20. When there is no flow outlet for the hydraulic oil, the height of the hydroponic tank 2 will not decrease. When there is a flow outlet for the hydraulic oil, the height of the hydroponic tank 2 will decrease.

[0056] Specifically, a side cylinder 10 is fixedly connected to the bottom end of the outer cylinder 9, a first piston 15 is slidably connected to the inner side of the side cylinder 10, and a spring 16 is provided on the inner side of the side cylinder 10. The spring 16 is used to achieve the function of resetting. The two ends of the spring 16 are fixedly connected to the inner side of one end of the side cylinder 10 and one side of the first piston 15, respectively. The inner side of one end of the side cylinder 10 is connected to the inner side of the bottom end of the outer cylinder 9 through a flow control valve 17.

[0057] When the flow control valve 17 is fully closed, the outer cylinder 9 and the inner cylinder 11 provide complete support for the hydroponic tank 2;

[0058] After the flow control valve 17 opens and closes, the hydraulic oil in the outer cylinder 9 will enter the side cylinder 10 under the action of gravity for compensation, and the hydroponic tank 2 will slowly descend. By changing the degree of opening and closing of the flow control valve 17, the descent cycle of the hydroponic tank 2 can be changed to match the hydroponic vegetables 1 with different seedling cycles.

[0059] Specifically, a one-way return valve 18 is fixedly connected to the inner side of one end of the side cylinder 10, and the hydraulic oil in the side cylinder 10 can be returned through the one-way return valve 18.

[0060] The one-way reflux valve 18 is designed to increase the reflux area and facilitate the resetting of the hydroponic tank 2.

[0061] Example 2 is a further improvement upon Example 1. Please refer to Example 1. Figures 1-9 A connecting cylinder 21 is fixedly connected to one side of the hydroponic tank 2. The inner side of one end of the connecting cylinder 21 is connected to the inner side of the hydroponic tank 2 through an opening 28. A sliding plate 27 is slidably connected to the inner side of the connecting cylinder 21. The sliding of the sliding plate 27 can realize the flow and compensation of nutrient solution in the hydroponic tank 2.

[0062] Specifically, a level gauge 22 is fixedly installed on the inner side of the hydroponic tank 2 to obtain the height of the nutrient solution in the hydroponic tank 2.

[0063] Under the above configuration, a level gauge 22 is fixedly installed on the inner side of the hydroponic tank 2. The level gauge 22 is used to obtain the height of the nutrient solution in the hydroponic tank 2. When the nutrient solution decreases, the slide plate 27 can move towards the hydroponic tank 2 to compensate for the nutrient solution. The concentration of the nutrient solution in the connecting cylinder 21 can be set very high to achieve the function of nutrient solution concentration compensation.

[0064] At the same time, when the slide plate 27 reciprocates in the connecting cylinder 21, it can make the liquid in the hydroponic tank 2 flow continuously, thereby increasing the uniformity of the nutrient solution in the hydroponic tank 2, ensuring that the vegetables are in the same nutrient solution concentration, and ensuring that the same batch of hydroponic vegetables grows in a consistent manner.

[0065] Specifically, a screw 26 is rotatably connected to the inner side of the connecting cylinder 21, and the inner side of the screw 26 is helically connected to the inner side of the slide plate 27. A limit rod 24 is fixedly connected to one side of the slide plate 27, and the limit rod 24 is slidably connected to the inner side of one end of the connecting cylinder 21.

[0066] Specifically, a motor 25 is fixedly connected to one end of the connecting cylinder 21, and the end of the main shaft of the motor 25 is fixedly connected to one end of the screw 26. The left and right movement of the slide plate 27 is achieved by the forward and reverse rotation of the motor 25.

[0067] Under the above configuration, when the motor 25 rotates, it will drive the screw 26 to rotate, and the rotation of the screw 26 will force the slide plate 27 to move to the left or right.

[0068] Specifically, a sensing block 23 is fixedly connected to one end of the connecting cylinder 21, and a potentiometer (not shown in the figure) is fixedly connected to the upper side of the limiting rod 24. The potentiometer is slidably connected to the sensing block 23 to obtain the position of the slide plate 27 inside the connecting cylinder 21.

[0069] After determining the position of the skateboard 27 within the connecting cylinder 21, precise nutrient solution compensation can be achieved.

[0070] 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. An energy-saving seedling raising device for hydroponic vegetable cultivation, comprising a hydroponic tank (2) and a cultivation plate (3), characterized in that: The hydroponic tank (2) is located on the lower side of the cultivation plate (3), and the cultivation plate (3) has cultivation holes (3a) for the roots (1b) of the hydroponic vegetables (1) to pass through; The seedling device also includes a support column (4) and a support plate (5). Both sides of the hydroponic pool (2) and the culture plate (3) are slidably connected to the outside of the support column (4) through connecting ears. The front end of the hydroponic pool (2) and the culture plate (3) are provided with a sliding groove (13). The inner side of the sliding groove (13) is slidably connected to a slider (14). The front ends of the slider (14) on the hydroponic pool (2) and the slider (14) on the culture plate (3) are rotatably connected to the same L-shaped plate (8) through a rotating shaft. The top of the support plate (5) is fixedly connected to a horizontal plate (6). Both the horizontal plate (6) and the L-shaped plate (8) have several horizontally placed through holes (12) on their inner sides. In the initial position, the through holes (12) on the horizontal plate (6) and the through holes (12) on the L-shaped plate (8) correspond to each other. The rotating column (7) is inserted into one of the several horizontally placed through holes (12), and the rotating column (7) is simultaneously in the through holes (12) on both the horizontal plate (6) and the L-shaped plate (8). In the initial position, the L-shaped plate (8) can rotate around the rotating column (7). When the hydroponic pool (2) descends, the culture plate (3) will rise relatively. By changing the position of the rotating column (7) in the initial position, the rise of the culture plate (3) when the hydroponic pool (2) descends can be changed, which is used to match hydroponic vegetables (1) with different root-to-stem ratios. The seedling device also includes an outer cylinder (9), on the inner side of which a second piston (20) is fixedly connected. An inner cylinder (11) is fixedly connected to the top of the second piston (20). The top of the inner cylinder (11) is fixedly connected to the bottom of the hydroponic pool (2) to provide movable support for the hydroponic pool (2). A connection hole (19) is provided at the top of the outer cylinder (9). Hydraulic oil is filled below the second piston (20) on the inner side of the outer cylinder (9).

2. The energy-saving seedling raising device for hydroponic vegetable cultivation according to claim 1, characterized in that: The bottom end of the outer cylinder (9) is fixedly connected to a side cylinder (10), and the inner side of the side cylinder (10) is slidably connected to a first piston (15). A spring (16) is provided on the inner side of the side cylinder (10), and the two ends of the spring (16) are fixedly connected to the inner side of one end of the side cylinder (10) and one side of the first piston (15), respectively. The inner side of one end of the side cylinder (10) is connected to the inner side of the bottom end of the outer cylinder (9) through a flow control valve (17). When the flow control valve (17) is fully closed, the outer cylinder (9) and the inner cylinder (11) provide complete support for the hydroponic tank (2); After the flow control valve (17) opens and closes, the hydraulic oil in the outer cylinder (9) will enter the side cylinder (10) under the action of gravity for compensation, and the hydroponic tank (2) will slowly descend. By changing the degree of opening and closing of the flow control valve (17), the descent completion cycle of the hydroponic tank (2) can be changed to match the hydroponic vegetables (1) with different seedling cycles.

3. The energy-saving seedling raising device for hydroponic vegetable cultivation according to claim 2, characterized in that: A one-way return valve (18) is also fixedly connected to the inner side of one end of the side cylinder (10), and the hydraulic oil in the side cylinder (10) can be returned through the one-way return valve (18).

4. An energy-saving seedling raising device for hydroponic vegetable cultivation according to any one of claims 1-3, characterized in that: A connecting tube (21) is fixedly connected to one side of the hydroponic pool (2). The inner side of one end of the connecting tube (21) is connected to the inner side of the hydroponic pool (2) through an opening (28). A sliding plate (27) is slidably connected to the inner side of the connecting tube (21). The flow and compensation of nutrient solution in the hydroponic pool (2) can be realized by sliding the sliding plate (27).

5. The energy-saving seedling raising device for hydroponic vegetable cultivation according to claim 4, characterized in that: A level gauge (22) is fixedly installed on the inner side of the hydroponic tank (2) to obtain the height of the nutrient solution in the hydroponic tank (2).

6. The energy-saving seedling raising device for hydroponic vegetable cultivation according to claim 5, characterized in that: The inner side of the connecting cylinder (21) is rotatably connected to a screw (26), the inner side of the screw (26) is spirally connected to the inner side of the slide plate (27), and a limit rod (24) is fixedly connected to one side of the slide plate (27). The limit rod (24) is slidably connected to the inner side of one end of the connecting cylinder (21).

7. The energy-saving seedling raising device for hydroponic vegetable cultivation according to claim 6, characterized in that: One end of the connecting cylinder (21) is fixedly connected to a motor (25), and the end of the main shaft of the motor (25) is fixedly connected to one end of the screw (26). The left and right movement of the slide plate (27) is achieved by the forward and reverse rotation of the motor (25).

8. The energy-saving seedling raising device for hydroponic vegetable cultivation according to claim 7, characterized in that: One end of the connecting cylinder (21) is fixedly connected to a sensing block (23), and a potentiometer is fixedly connected to the upper side of the limiting rod (24). The potentiometer is slidably connected to the sensing block (23) to obtain the position of the sliding plate (27) inside the connecting cylinder (21).

Images