Energy-saving seedling raising device for hydroponic vegetable planting

Abstract

The invention relates to the technical field of vegetable seedling culture, in particular to an energy-saving seedling culture device for hydroponic vegetable planting, a culture plate is provided with culture holes allowing roots of hydroponic vegetables to penetrate through, the seedling culture device further comprises supporting columns and a supporting plate, and the two sides of a hydroponic pool and the two sides of the culture plate are slidably connected with the outer sides of the supporting columns through connecting lugs. The front end of the water culture pool and the front end of the culture plate are each provided with a sliding groove, sliding blocks are slidably connected to the inner sides of the sliding grooves, and the front ends of the sliding blocks on the water culture pool and the front ends of the sliding blocks on the culture plate are rotationally connected with the same L-shaped plate through rotating shafts. Lever mechanisms are formed at the two ends of the L-shaped plate with the rotating column as the center, when the water culture pond descends, under the action of the lever mechanisms, the culture plates can relatively ascend, and when the water culture pond descends, the ratio of the power arms to the resisting arms at the two ends can be changed by changing the position of the rotating column at the initial position, and the ascending amplitude of the culture plates can be changed.

Description

Technical Field

[0001] The invention relates to the technical field of vegetable seedling cultivation, and in particular to an energy-saving seedling cultivation device for hydroponic vegetable planting. Background Art

[0002] Hydroponic vegetables refer to the cultivation method in which the roots of vegetables grow in nutrient solution. Hydroponic vegetables have the characteristics of long growth cycle and short growth period, and are rich in a variety of vitamins and minerals necessary for the human body.

[0003] The application number is 202210704710.7, which is a water-saving hydroponic vegetable seedling raising device that can promote rooting density. It also solves the problem that the length of the hydroponic vegetable roots in the nutrient solution cannot be adjusted. It includes a liquid storage box, a position adjustment mechanism is provided on the liquid storage box, a height adjustment mechanism is provided on the upper part of the position adjustment mechanism, and a liquid circulation mechanism and a collection mechanism are provided on the lower part of the position adjustment mechanism. The present invention realizes that half of the vegetable roots are located in the nutrient solution through the height adjustment mechanism;

[0004] But different vegetables have different root-to-stem ratios (1a / 1b), such as Figure 1 As shown, the roots of hydroponic vegetables need to remain half in the nutrient solution and the other half exposed to the air. Figure 2 As shown, the best environment can be provided for the growth of vegetables. The existing seedling raising device cannot make flexible and automatic adjustments according to different types of hydroponic vegetables. The present invention uses the weight of the nutrient solution as the power, combined with the variety of vegetables and the seedling raising cycle, to automatically adjust the height of the vegetable root system in the nutrient solution.

[0005] At the same time, the existing hydroponic vegetable seedling raising device cannot ensure that the vegetables are in the same nutrient solution concentration, which easily leads to the problem of inconsistent growth of the same batch of hydroponic vegetables. Therefore, in order to solve the above problem, an energy-saving hydroponic vegetable seedling raising device is proposed. Summary of the invention

[0006] The object of the present invention is to provide an energy-saving seedling raising device for hydroponic vegetable planting, which can use the weight of the nutrient solution as power and, in combination with the variety of vegetables and the seedling raising cycle, can automatically adjust the height of the vegetable roots in the nutrient solution and can make the same batch of vegetables be in the same nutrient solution concentration, thereby ensuring the consistent growth of the same batch of hydroponic vegetables.

[0007] To achieve the above object, the present invention provides the following technical solutions: an energy-saving seedling raising device for hydroponic vegetable planting, comprising a hydroponic pool and a culture plate, wherein the hydroponic pool is arranged on the lower side of the culture plate, and the culture plate is provided with culture holes for hydroponic vegetable roots to pass through;

[0008] The seedling raising 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 outer side of the support column through connecting ears. The front ends of the hydroponic pool and the culture plate are provided with a slide groove, and the inner side of the slide groove is slidably connected with a slider. 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 with a horizontal plate, and the inner sides of the horizontal plate and the L-shaped plate are provided with a plurality of horizontal through holes. In the initial position, the through holes on the horizontal plate correspond to the through holes on the L-shaped plate, the rotating column is inserted into one of the plurality of horizontal through holes, and the rotating column is simultaneously in the through holes on the horizontal plate and the through holes on the L-shaped plate;

[0010] In the initial position, the L-shaped plate can rotate around the rotating column. When the hydroponic pool descends, the culture plate will rise relatively. By changing the position of the rotating column in the initial position, the rising amplitude of the culture plate when the hydroponic pool descends can be changed, which is 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 power, and in combination with the variety of vegetables and the seedling raising cycle, can automatically and reasonably adjust the height of the vegetable root system in the nutrient solution. In the present invention, in the initial position, the L-shaped plate can rotate with the rotating column as the center, and the two ends of the L-shaped plate form a lever mechanism with the rotating column as the center. When the hydroponic pool descends, under the action of the lever mechanism, the culture plate will rise relatively. 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, and the rising amplitude of the culture plate can be changed, so as 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. In the process of seedling raising, about half of the roots of different hydroponic vegetables are in the nutrient solution, and the other half are in the air, providing the best environment for vegetable growth;

[0012] The more the rotating column is positioned to the right, the smaller the resistance arm is, and when the hydroponic pool drops, the lower the sensitivity of the culture plate to rise will be. The more the rotating column is positioned to the left, when the hydroponic pool drops, the larger the resistance arm is, and the higher the sensitivity of the culture plate to rise will be.

[0013] When the present invention is used, during the process of adjusting the position of the rotating column, temporary support can be achieved in cooperation with an external temporary support frame.

[0014] As an energy-saving seedling raising device for hydroponic vegetable planting of the present invention, the seedling raising device preferably also includes an outer cylinder, the inner side of the outer cylinder is fixedly connected to a second piston, the top end of the second piston is fixedly connected to an inner cylinder, the top end of the inner cylinder is fixedly connected to the bottom end of the hydroponic pool, for realizing movable support for the hydroponic pool, the top end of the outer cylinder is provided with a connecting hole, and the inner side of the outer cylinder is filled with hydraulic oil below the second piston.

[0015] Under the above setting, 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 pool will not decrease. When there is a flow outlet for the hydraulic oil, the height of the hydroponic pool will decrease.

[0016] As an energy-saving hydroponic vegetable seedling raising device of the present invention, preferably, the bottom end of the outer cylinder is fixedly connected to a side cylinder, the inner side of the side cylinder is slidably connected to a first piston, the inner side of the side cylinder is provided with a spring, the spring is used to achieve a reset effect, the two ends of the spring are respectively fixedly connected to the inner side of one end of the side cylinder and one side of the first piston, 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 cylinder and the inner cylinder complete the support of the hydroponic pool;

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

[0019] As an energy-saving seedling raising device for hydroponic vegetable planting of the present invention, preferably, a one-way reflux valve is fixedly connected to the inner side of one end of the side tube, and the hydraulic oil in the side tube can reflux through the one-way reflux valve.

[0020] The one-way reflux valve is used to increase the reflux area and facilitate the reset of the hydroponic pool;

[0021] As an energy-saving seedling raising device for hydroponic vegetable planting of the present invention, preferably, a connecting tube is fixedly connected to one side of the hydroponic pool, the inner side of one end of the connecting tube is connected to the inner side of the hydroponic pool through an opening, and a slide plate is slidably connected to the inner side of the connecting tube, and the flow and compensation of the nutrient solution in the hydroponic pool can be achieved through the sliding of the slide plate.

[0022] As an energy-saving seedling raising device for hydroponic vegetable planting of the present invention, preferably, a liquid level meter is fixedly provided on the inner side of the hydroponic pool for obtaining the height of the nutrient solution in the hydroponic pool.

[0023] Under the above setting, the present invention is fixedly provided with a liquid level meter on the inner side of the hydroponic pool, and the liquid level meter is used to obtain the height of the nutrient solution in the hydroponic pool. When the nutrient solution is reduced, the slide plate can be moved toward the hydroponic pool to perform the nutrient solution compensation. The concentration of the nutrient solution in the connecting tube can be set very high to achieve the nutrient solution concentration compensation.

[0024] At the same time, when the slide plate reciprocates in the connecting tube, the liquid in the hydroponic pool can be continuously flowed, thereby increasing the uniformity of the nutrient solution in the hydroponic pool, ensuring that the vegetables are in the same nutrient solution concentration, and ensuring that the same batch of hydroponic vegetables grow uniformly;

[0025] As an energy-saving seedling raising device for hydroponic vegetable planting of the present invention, preferably, the inner side of the connecting tube is rotatably connected with a screw rod, the inner side of the screw rod is spirally connected to the inner side of the slide plate, one side of the slide plate is fixedly connected with a limiting rod, and the limiting rod is slidably connected to the inner side of one end of the connecting tube.

[0026] As an energy-saving seedling raising device for hydroponic vegetable planting of the present invention, preferably, one end of the connecting tube is fixedly connected to a motor, the end of the main shaft of the motor is fixedly connected to one end of the screw rod, and the left and right movement of the slide plate is achieved by the forward and reverse rotation of the motor.

[0027] Under the above settings, when the motor rotates, it will drive the screw to rotate, and the rotation of the screw will force the slide plate to move left or right;

[0028] As an energy-saving seedling raising device for hydroponic vegetable planting of the present invention, preferably, one end of the connecting tube is fixedly connected to a sensing block, and the upper side of the limiting rod is fixedly connected to a potentiometer (not shown in the figure), and the potentiometer is slidably connected to the sensing block for obtaining the position of the slide plate in the connecting tube.

[0029] After obtaining the position of the slide plate in the connecting tube, accurate nutrient solution compensation can be achieved.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] 1. This energy-saving seedling raising device for hydroponic vegetable planting, in the initial position, the L-shaped plate can rotate with the rotating column as the center. When the hydroponic pool descends, the culture plate will rise relatively. By changing the position of the rotating column in the initial position, the rising amplitude of the culture plate can be changed when the hydroponic pool descends, which is used to match hydroponic vegetables with different root-to-stem ratios. The present invention can use the weight of the nutrient solution as power, combined with the variety of vegetables and the seedling raising cycle, and can automatically and reasonably adjust the height of the vegetable root system in the nutrient solution. In the present invention, in the initial position, the L-shaped plate can rotate with the rotating column as the center. The L-shaped plate is rotated to form a lever mechanism at both ends with the rotating column as the center. When the hydroponic pool descends, the culture plate will rise 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 pool descends, and the rising amplitude of the culture plate can be changed, so as 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. During the seedling process, about half of the roots of different hydroponic vegetables are in the nutrient solution and the other half are in the air, providing the best environment for vegetable growth.

[0032] 2. In this energy-saving seedling raising device for hydroponic vegetable planting, the closer the position of the rotating column is to the right, the smaller the resistance arm is. When the hydroponic pool descends, the lower the sensitivity of the culture plate to rising will be. The closer the position of the rotating column is to the left, the longer the resistance arm is, and the higher the sensitivity of the culture plate to rising will be. When the present invention is used, during the process of adjusting the position of the rotating column, temporary support can be achieved in conjunction with an external temporary support frame.

[0033] 3. This is an energy-saving seedling raising device for hydroponic vegetable planting. 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 pool will not decrease. When there is a flow outlet for the hydraulic oil, the height of the hydroponic pool will decrease. When the flow control valve is completely closed, the outer cylinder and the inner cylinder support the hydroponic pool. After the flow control valve opens and closes, the hydraulic oil in the outer cylinder enters the side cylinder under the action of gravity for compensation, and the hydroponic pool slowly descends. By changing the opening and closing degree of the flow control valve, the descending completion cycle of the hydroponic pool is changed to match hydroponic vegetables with different seedling raising cycles. The one-way reflux valve is used to increase the reflux area to facilitate the resetting of the hydroponic pool.

[0034] 4. This is an energy-saving seedling raising device for hydroponic vegetable planting. The present invention has a liquid level meter fixedly arranged on the inner side of the hydroponic pool. The liquid level meter is used to obtain the height of the nutrient solution in the hydroponic pool. When the nutrient solution is reduced, the slide plate can be moved toward the direction of the hydroponic pool to compensate for the nutrient solution. The concentration of the nutrient solution in the connecting tube can be set very high to achieve the effect of nutrient solution concentration compensation. At the same time, when the slide plate reciprocates in the connecting tube, a continuous flow of liquid can be generated in the hydroponic pool, thereby increasing the uniformity of the nutrient solution in the hydroponic pool, ensuring that the vegetables are in the same nutrient solution concentration, and ensuring that the same batch of hydroponic vegetables grow consistently. After obtaining the position of the slide plate in the connecting tube, the potentiometer can achieve the effect of precise nutrient solution compensation. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a structural diagram of the existing root-to-stem ratio of hydroponic vegetables;

[0036] Figure 2 This is a schematic diagram of the effect that the present invention is intended to achieve in the seedling raising stage;

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

[0038] Figure 4 It 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 A;

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

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

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

[0043] Fig. 9 For the present invention Figure 7 Schematic diagram of the structure at D.

[0044] In the figure: 1. Hydroponic vegetables; 1a. Stems; 1b. Roots; 2. Hydroponic pool; 3. Culture plate;

[0045] 3a, culture hole; 4, support column; 5, support plate; 6, horizontal plate; 7, rotating column; 8, L-shaped plate; 9, outer tube; 10, side tube; 11, inner tube; 12, through hole; 13, slide groove; 14, slider; 15, first piston; 16, spring; 17, flow control valve; 18, one-way reflux valve; 19, connecting hole; 20, second piston; 21, connecting tube; 22, liquid level meter; 23, sensor block; 24, limit rod; 25, motor; 26, screw; 27, slide plate; 28, opening. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work 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 raising device for hydroponic vegetable planting, comprising a hydroponic pool 2 and a culture plate 3, wherein the hydroponic pool 2 is arranged at the lower side of the culture plate 3, and the culture plate 3 is provided with a culture hole 3a for a hydroponic vegetable 1b to pass through;

[0048] The seedling raising 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 outer side of the support column 4 through connecting ears. The front ends of the hydroponic pool 2 and the culture plate 3 are provided with a slide groove 13. The inner side of the slide groove 13 is slidably connected with 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.

[0049] The top of the support plate 5 is fixedly connected with a transverse plate 6, and the inner sides of the transverse plate 6 and the L-shaped plate 8 are provided with a plurality of transverse through holes 12. In the initial position, the through holes 12 on the transverse plate 6 correspond to the through holes 12 on the L-shaped plate 8, and the rotating column 7 is inserted into one of the plurality of transverse through holes 12, and the rotating column 7 is simultaneously in the through holes 12 on the transverse plate 6 and the through holes 12 on 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 rising amplitude 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 power, and in combination with the variety of vegetables and the seedling raising cycle, can automatically and reasonably adjust the height of the vegetable root system in the nutrient solution. In the present invention, in the initial position, the L-shaped plate 8 can rotate with the rotating column 7 as the center, and the two ends of the L-shaped plate 8 form a lever mechanism with the rotating column 7 as the center. When the hydroponic pool 2 descends, under the action of the lever mechanism, the culture plate 3 will rise relatively. 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, and the rising amplitude of the culture plate 3 can be changed, so as 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. In the seedling raising process, about half of the roots 1b of different hydroponic vegetables 1 are in the nutrient solution, and the other half are in the air, providing the best environment for vegetable growth;

[0052] The more the rotating column 7 is positioned to the right, the smaller the resistance arm is, and when the hydroponic pool 2 drops, the lower the sensitivity of the culture plate 3 to rise will be; the more the rotating column 7 is positioned to the left, when the hydroponic pool 2 drops, the larger the resistance arm is, and the higher the sensitivity of the culture plate 3 to rise will be;

[0053] When the present invention is used, during the process of adjusting the position of the rotating column 7, an external temporary support frame can be used to achieve temporary support.

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

[0055] Under the above setting, 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 pool 2 will not be reduced. When there is a flow outlet for the hydraulic oil, the height of the hydroponic pool 2 will be reduced.

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

[0057] When the flow control valve 17 is completely closed, the outer cylinder 9 and the inner cylinder 11 complete the support of the hydroponic pool 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 for compensation under the action of gravity, and the hydroponic pool 2 will slowly descend. By changing the opening and closing degree of the flow control valve 17, the descent completion cycle of the hydroponic pool 2 is changed to match the hydroponic vegetables 1 with different seedling raising cycles.

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

[0060] The one-way reflux valve 18 is provided to increase the reflux area, so as to facilitate the resetting of the hydroponic pool 2 .

[0061] Example 2: This example is a further improvement of Example 1. Figure 1-Figure 9 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 slide plate 27 is slidably connected to the inner side of the connecting tube 21. The sliding of the slide plate 27 can realize the flow and compensation of the nutrient solution in the hydroponic pool 2.

[0062] Specifically, a liquid level meter 22 is fixedly provided on the inner side of the hydroponic pool 2 for obtaining the height of the nutrient solution in the hydroponic pool 2 .

[0063] Under the above setting, the present invention is fixedly provided with a liquid level meter 22 on the inner side of the hydroponic pool 2, and the liquid level meter 22 is used to obtain the height of the nutrient solution in the hydroponic pool 2. When the nutrient solution is reduced, the slide plate 27 can be moved toward the hydroponic pool 2 to perform the nutrient solution compensation. The concentration of the nutrient solution in the connecting tube 21 can be set very high to achieve the nutrient solution concentration compensation.

[0064] At the same time, when the slide plate 27 reciprocates in the connecting tube 21, the liquid in the hydroponic pool 2 can be continuously flowed, thereby increasing the uniformity of the nutrient solution in the hydroponic pool 2, ensuring that the vegetables are in the same nutrient solution concentration, and ensuring that the hydroponic vegetables in the same batch grow uniformly;

[0065] Specifically, a screw rod 26 is rotatably connected to the inner side of the connecting tube 21 , and the inner side of the screw rod 26 is spirally 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 tube 21 .

[0066] Specifically, one end of the connecting tube 21 is fixedly connected to the motor 25 , and the end of the main shaft of the motor 25 is fixedly connected to one end of the screw rod 26 , and 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 drives the screw 26 to rotate, and the rotation of the screw 26 forces the slide plate 27 to move left or right.

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

[0069] After the position of the slide plate 27 in the connecting tube 21 is obtained, accurate nutrient solution compensation can be achieved.

[0070] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An energy-saving hydroponic vegetable seedling raising device, comprising a hydroponic pool (2) and a culture plate (3), characterized in that: The hydroponic pool (2) is arranged on the lower side of a culture plate (3), and the culture plate (3) is provided with culture holes (3a) for the roots (1b) of the hydroponic vegetables (1) to pass through; The seedling raising device further comprises a supporting column (4) and a supporting plate (5); both sides of the hydroponic pool (2) and the culture plate (3) are slidably connected to the outer side of the supporting column (4) via connecting ears; the front ends of the hydroponic pool (2) and the culture plate (3) are provided with a slide groove (13); the inner side of the slide 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) via a rotating shaft; The top end of the support plate (5) is fixedly connected to a transverse plate (6), and the inner sides of the transverse plate (6) and the L-shaped plate (8) are both provided with a plurality of transverse through holes (12). In an initial position, the through holes (12) on the transverse plate (6) correspond to the through holes (12) on the L-shaped plate (8), and the rotating column (7) is inserted into one of the plurality of transverse through holes (12), and the rotating column (7) is simultaneously located in the through holes (12) on the transverse plate (6) and the through holes (12) on the L-shaped plate (8); In the initial position, the L-shaped plate (8) can rotate around the rotating column (7), and 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 rising range of the culture plate (3) when the hydroponic pool (2) descends can be changed, so as to match hydroponic vegetables (1) with different root-to-stem ratios.

2. The energy-saving seedling raising device for hydroponic vegetable planting according to claim 1 is characterized in that: The seedling raising device further comprises an outer cylinder (9), the inner side of which is fixedly connected to a second piston (20), the top end of which is fixedly connected to an inner cylinder (11), the top end of which is fixedly connected to the bottom end of a hydroponic pool (2) for providing movable support for the hydroponic pool (2), a connecting hole (19) being provided at the top end of the outer cylinder (9), and the inner side of which is filled with hydraulic oil below the second piston (20).

3. The energy-saving seedling raising device for hydroponic vegetable planting according to claim 2 is characterized in that: The bottom end of the outer tube (9) is fixedly connected to a side tube (10), the inner side of the side tube (10) is slidably connected to a first piston (15), the inner side of the side tube (10) is provided with a spring (16), the two ends of the spring (16) are respectively fixedly connected to the inner side of one end of the side tube (10) and one side of the first piston (15), and the inner side of one end of the side tube (10) is connected to the inner side of the bottom end of the outer tube (9) through a flow control valve (17); When the flow control valve (17) is completely closed, the outer cylinder (9) and the inner cylinder (11) completely support the hydroponic pool (2); After the flow control valve (17) is opened and closed, the hydraulic oil in the outer cylinder (9) enters the side cylinder (10) under the action of gravity to compensate, and the hydroponic pool (2) slowly descends. By changing the opening and closing degree of the flow control valve (17), the descending completion cycle of the hydroponic pool (2) is changed to match the hydroponic vegetables (1) with different seedling raising cycles.

4. The energy-saving seedling raising device for hydroponic vegetable planting according to claim 3 is characterized by: A one-way reflux valve (18) is also fixedly connected to the inner side of one end of the side tube (10), and the hydraulic oil in the side tube (10) can be refluxed through the one-way reflux valve (18).

5. An energy-saving seedling raising device for hydroponic vegetable planting according to any one of claims 1 to 4, 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) via an opening (28); a slide plate (27) is slidably connected to the inner side of the connecting tube (21); and the sliding of the slide plate (27) can realize the flow and compensation of the nutrient solution in the hydroponic pool (2).

6. The energy-saving seedling raising device for hydroponic vegetable planting according to claim 5 is characterized in that: A liquid level meter (22) is fixedly arranged on the inner side of the hydroponic pool (2) for obtaining the height of the nutrient solution in the hydroponic pool (2).

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

8. The energy-saving seedling raising device for hydroponic vegetable planting according to claim 7 is characterized in that: One end of the connecting tube (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 a screw rod (26), so that the slide plate (27) can move left and right through the forward and reverse rotation of the motor (25).

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

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