Melon seedling raising device based on intelligent regulation

Abstract

The application discloses a melon seedling raising device based on intelligent regulation and control applied to the field of agriculture, is based on the principle that different humidity substrates cause different overall gravity of the seedling raising tray, makes the degree of gravity extrusion of the seedling raising tray with different humidity on the elastic assembly different, so that the height positions of the multiple seedling raising trays and the vertical rods on the seedling raising trays are different, through the moving detection operation of the dynamic monitor, the seedling raising tray in the abnormal height position can be effectively detected, whether the seedling raising tray has the situation of too low humidity is judged, compared with the way of detecting the overall gravity through the humidity sensor in the prior art, the detection means of the application has more comprehensive humidity detection effect, in addition, the person skilled in the art can use the device to perform single flow irrigation, overall flow irrigation or overall tidal irrigation and other operations on the seedling raising tray according to irrigation needs, and the economic practicability of the device is effectively improved.

Description

Technical Field

[0001] This invention relates to the field of agriculture, and in particular to a melon seedling raising device based on intelligent control. Background Technology

[0002] Seedling cultivation refers to the process of nurturing seedlings in nurseries, hotbeds, or greenhouses in preparation for transplanting into the ground. During seedling cultivation, suitable seed trays and a good substrate are selected and filled correctly. Seeds are sown in the center of the substrate within the seedholes, evenly covered, and watered appropriately. This completes the initial work of factory-style seedling cultivation using seed trays. Seed trays, also known as seedling trays, are an important tool for seedling cultivation. The shape of the seedholes should ideally be a square inverted trapezoid to guide the roots downwards.

[0003] For example, Chinese patent CN109548521B discloses a seedling raising device. By reasonably setting the structure of the seedling raising device, the seedling trays are placed inside the seedling trays. Seedling raising is not limited by the seedling raising site and scene. The number of seedling trays and seedling plugs and their placement can be adjusted according to the specific actual situation to maximize the use of existing sites and scenes and reduce the space occupation rate.

[0004] Common irrigation methods for seedling cultivation include sprinkler irrigation, drip irrigation, and bottom tidal irrigation (using a water pump to pump liquid from a water tank into the seedling bed, soaking the seedling trays, raising the liquid level to 1 / 3-1 / 2 of the height of the seedling trays, allowing the substrate to fully absorb water from bottom to top through the water absorption holes at the bottom of the seedling trays and its own capillary action, maintaining this for a few minutes, and then draining the water from the seedling bed using a water pump).

[0005] Water management is crucial in seedling production; both excessive dryness and excessive moisture can negatively impact seed and plant growth. Therefore, effective monitoring of substrate moisture is essential for seedling cultivation. Existing monitoring methods include direct substrate monitoring via soil moisture sensors, monitoring tray weight via gravity sensors, and manual inspection. However, all these methods have drawbacks: manual inspection is time-consuming, labor-intensive, and untimely; placing soil moisture sensors in only a few representative trays yields incomplete results, and using too many sensors increases costs; gravity sensors typically monitor the entire seedbed, making it difficult to measure individual trays, and substrate moisture varies between trays due to various factors (such as differences in seedling growth and tray placement). Therefore, existing moisture monitoring methods suffer from incomplete monitoring. Summary of the Invention

[0006] The core of this invention lies in utilizing the principle that different substrates with varying humidity levels cause different overall weights in the seedling trays. By combining this with a dynamic monitor to track the height of the seedling trays, the invention solves the problem of incomplete detection in existing technologies that rely on humidity sensors or overall weight detection. Furthermore, by using a tray, the invention enables single-unit irrigation from top to bottom, overall irrigation, or overall tidal irrigation from bottom to top, effectively improving the economic practicality of the device.

[0007] To solve the above problems, the present invention adopts the following technical solution.

[0008] A melon seedling raising device based on intelligent control includes multiple seedling trays, trays, pads, and support plates. There are multiple trays, and each tray has multiple rectangular holes for placing the seedling trays. There are a pair of pads arranged parallel to each other on the underside of the trays. There are at least a pair of support plates, both located on the underside of the pads. Each pair of support plates has a pair of drive components connected to its upper end. Multiple trays are arranged in a single row on the upper side of the pads. The first and last two trays are connected to the pads and drive components by a first bolt, and the remaining trays are connected to the pads by a second bolt.

[0009] Both ends of the two trays, which are far apart from each other, are connected to dynamic monitors. The dynamic monitors include a carrier plate, an electric slide rail, a slide base, and a laser detector. The carrier plate is connected to the side of the tray by a third bolt. The electric slide rail is fixedly connected to the upper end of the carrier plate. The slide base is slidably connected to the upper end of the electric slide rail. The laser detector is fixedly connected to the upper end of the slide base. The pair of laser detectors are an infrared laser source and a laser receiver, respectively. The support plate has multiple limiting grooves that correspond one-to-one with the seedling trays. Some limiting grooves contain elastic components. Some seedling trays have vertical bars glued to their upper ends. The number of elastic components and vertical bars are the same and they correspond one-to-one.

[0010] Furthermore, a fixed ring is fixedly connected to the inner wall of the rectangular hole, and a tray is placed on the upper end of the fixed ring, with the seedling tray placed on the upper end of the tray.

[0011] Furthermore, the elastic component includes a telescopic rod, a lower plate, an upper plate, and a compression spring. The telescopic rod is fixedly connected between the lower plate and the upper plate, the compression spring is movably sleeved on the outside of the telescopic rod, and the lower plate matches the limiting groove.

[0012] Optionally, a water trough is provided at the top of the tray, and a pair of water guiding channels communicating with the water trough are provided on the side of the tray away from the water trough. The openings of the pair of water guiding channels away from the water trough are respectively fixedly connected to a main water pipe and a secondary water guiding pipe. A pair of insertion holes communicating with the outside are provided on the inner wall of the water trough away from the water guiding channels, and the pair of insertion holes are respectively matched with the main water pipe and the secondary water guiding pipe.

[0013] Furthermore, the length of the main water pipe extending to the outside is less than the length of the secondary water pipe extending to the outside. When the main water pipe and the secondary water pipe on one tray are fully inserted into the socket on the other tray, the end of the main water pipe is located inside the water tank, and the end of the secondary water pipe passes through the water tank and is inserted into the interior of the water channel.

[0014] Furthermore, the edge of the water tank is provided with multiple movable plate sleeves, and each movable plate sleeve corresponds to a multiple rectangular hole. The movable plate sleeve includes an actuating plate, a horizontal plate, and a sealing plate. The sealing plate slides against the inner wall of the water tank. The actuating plate extends to the inner side of the multiple rectangular holes and is fixedly connected to the side end of the support plate. The horizontal plate is fixedly connected to the upper end of the actuating plate and the sealing plate.

[0015] Furthermore, a water inlet pipe is fixedly connected to the inner wall of the water tank. The end of the water inlet pipe extends into the interior of the rectangular hole and is fixedly connected to a flexible hose. The end of the flexible hose away from the water inlet pipe is fixedly connected to an outlet pipe.

[0016] Furthermore, the upper end of the seedling tray is provided with crisscrossing water channels, and the inner wall of the water channels is provided with water holes that communicate with the holes. The water outlet pipe is matched with the water channels.

[0017] Furthermore, a second water guide hole for connecting adjacent rectangular holes is provided on the inner wall of the rectangular hole, and a first water guide hole is provided on the inner wall of the rectangular hole near the secondary water guide pipe, and the first water guide hole is connected to the adjacent water guide channel.

[0018] Furthermore, the pallet includes a rigid plate, with a rubber ring plate fixedly connected to the lower end of the rigid plate, and multiple evenly distributed protrusions fixedly connected to the upper end of the rigid plate.

[0019] Compared with the prior art, the advantages of this invention are:

[0020] This solution is based on the principle that different substrate moisture levels cause different overall weights of the seedling trays. This results in different degrees of gravitational compression of the elastic components by the seedling trays with different moisture levels, thus causing different movement ranges of the multiple seedling trays within the rectangular holes and different height positions of the seedling trays and the vertical rods on their upper sides. Through the movement detection operation of the dynamic monitor, seedling trays and vertical rods at abnormal height positions can be effectively detected, thereby detecting whether there is a situation where the moisture level of the seedling trays is too low. Compared with the existing technology that uses humidity sensors or overall gravity detection methods, the detection method of this application has a more comprehensive humidity detection effect.

[0021] By incorporating water troughs, water channels, main water pipes, secondary water pipes, and outlet pipes on the tray, those skilled in the art can use this device to perform single-unit flow irrigation, overall flow irrigation, or overall tidal irrigation from the bottom up on the seedling tray according to irrigation needs, effectively improving the economic practicality of this device. Attached Figure Description

[0022] Figure 1 The three-dimensional representation of the first embodiment of the present invention Figure 1 ;

[0023] Figure 2 The three-dimensional representation of the first embodiment of the present invention Figure 2 ;

[0024] Figure 3 The three-dimensional representation of the first embodiment of the present invention Figure 3 ;

[0025] Figure 4 This is an exploded view of the first embodiment of the present invention;

[0026] Figure 5 This is a partial exploded view of the tray in the first embodiment of the present invention;

[0027] Figure 6 This is a side view of the structure during humidity detection according to the first embodiment of the present invention;

[0028] Figure 7 The two-dimensional representation of the second embodiment of the present invention Figure 1 ;

[0029] Figure 8 The three-dimensional structure at the tray in the second embodiment of the present invention Figure 1 ;

[0030] Figure 9 The three-dimensional structure at the tray in the second embodiment of the present invention Figure 2 ;

[0031] Figure 10 This is a partial exploded view of the tray in the second embodiment of the present invention;

[0032] Figure 11 This is a schematic diagram of a partial side structure at the tray in the second embodiment of the present invention. Figure 1 ;

[0033] Figure 12 This is a schematic diagram of a partial side structure at the tray in the second embodiment of the present invention. Figure 2 ;

[0034] Figure 13 This is a schematic diagram of the top surface structure during single-unit or overall flow irrigation in the second embodiment of the present invention;

[0035] Figure 14 This is a schematic diagram of the top surface structure during tidal irrigation in the second embodiment of the present invention;

[0036] Figure 15 This is a schematic diagram of the front structure of the tray during tidal irrigation in the second embodiment of the present invention;

[0037] Figure 16 This is a schematic diagram of the side structure of the tray in the second embodiment of the present invention.

[0038] Explanation of the labels in the diagram:

[0039] 1. Seedling tray, 101. Water inlet trough, 102. Water hole, 2. Tray, 201. Rectangular hole, 202. Fixed ring, 203. Water trough, 204. Water guide channel, 205. Insertion hole, 206. Water guide hole one, 207. Water guide hole two, 3. Pad, 4. Support plate, 401. Limiting groove, 5. Drive assembly, 6. Elastic assembly, 61. Telescopic rod, 62. Lower plate, 63. Upper plate, 64. Compression spring, 7. Dynamic monitor, 71. Carrier plate, 72. Electric slide rail, 73. Slide seat, 74. Laser detector, 8. Vertical bar, 9. Support plate, 91. Rigid plate, 92. Rubber ring plate, 93. Protrusion, 10. Moving plate sleeve, 1001. Actuating plate, 1002. Horizontal plate, 1003. Sealing plate, 11. Main water pipe, 12. Secondary water guide pipe, 13. Water inlet pipe, 14. Flexible hose, 15. Water outlet pipe. Detailed Implementation

[0040] The technical solutions will now be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention.

[0041] First embodiment:

[0042] Please see Figures 1-2 A melon seedling raising device based on intelligent control includes multiple seedling trays 1, a tray 2, a pad 3, and a support plate 4. The number of trays 2 is multiple, and each tray 2 has multiple rectangular holes 201 for placing the seedling trays 1. Figure 5 As shown, a fixed ring 202 is fixedly connected to the inner wall of the rectangular hole 201. A tray 9 is placed on the upper end of the fixed ring 202. The seedling tray 1 is placed on the upper end of the tray 9. A single tray 2 can be used to support multiple seedling trays 1.

[0043] Please see Figure 2 and Figure 4 There is a pair of pads 3 arranged parallel to each other on the underside of the trays 2. There is at least a pair of support plates 4, both located on the underside of the pads 3. Each pair of support plates 4 has a pair of drive assemblies 5 connected to its upper end. The support plates 4 and drive assemblies 5 support the pair of pads 3 and the multiple trays 2 above them. The multiple trays 2 are arranged in a single row neatly on the upper side of the pads 3. Figure 2 and Figure 4 As shown, the two trays 2 at the beginning and end are connected by the first bolt ( Figure 2 (represented by 'a') is connected to the pad 3 and the drive assembly 5, and the remaining trays 2 are connected by the second bolt ( Figure 2 (represented by b) is connected to the pad 3, and the second bolt passes through the pad 3 from bottom to top and is threaded into the lower end of the tray 2.

[0044] Combination Figure 2 and Figure 5 As shown, the drive assembly 5 includes a base plate, a top plate, and an electric push rod fixedly connected between the base plate and the top plate. Both the base plate and the top plate have mounting holes, which facilitate the installation of the drive assembly 5. Specifically, when connecting the drive assembly 5 and the pad 3, the first bolt is passed through the mounting holes of the base plate and the pad 3 from bottom to top until it is threaded into the lower end of the tray 2. A pair of square grooves for accommodating the base plate are provided at the upper corner of the support plate 4. The bottom surface of the square grooves has threaded grooves. After the base plate is placed inside the square grooves, the fourth bolt is passed through the mounting holes of the base plate from top to bottom and threaded into the threaded grooves.

[0045] Please see Figures 1 to 4 Each of the two trays 2, located at opposite ends, is connected to a dynamic monitor 7. The dynamic monitor 7 includes a carrier plate 71, an electric slide rail 72, a slide block 73, and a laser detector 74. The carrier plate 71 is connected to the side of the tray 2 by a third bolt. The electric slide rail 72 is fixedly connected to the upper end of the carrier plate 71. The slide block 73 is slidably connected to the upper end of the electric slide rail 72. The laser detector 74 is fixedly connected to the upper end of the slide block 73. The laser detectors 74 on the two dynamic monitors 7 are an infrared laser source and a laser receiver, respectively. When there is no external obstruction between a pair of laser detectors 74, the light signal emitted by the infrared laser source can be received by the laser receiver. By sliding the slide block 73 on the upper end of the electric slide rail 72, the corresponding infrared laser source and laser receiver can be moved. The speed and direction of their movement are the same, so that the laser receiver is always on the same straight line as the light signal, which facilitates the reception of the light signal.

[0046] Please see Figure 4 and Figure 5 The support plate 4 has multiple limiting grooves 401 that correspond one-to-one with the seedling trays 1. Some of the limiting grooves 401 contain elastic components 6, and some seedling trays 1 have vertical rods 8 glued to their upper ends. The number of elastic components 6 and vertical rods 8 are the same and they correspond one-to-one. Figure 6 As shown, the elastic component 6 includes a telescopic rod 61, a lower plate 62, an upper plate 63, and a compression spring 64. The telescopic rod 61 is fixedly connected between the lower plate 62 and the upper plate 63. The compression spring 64 is movably sleeved on the outside of the telescopic rod 61. The lower plate 62 matches the limiting groove 401. When the lower plate 62 is placed in the limiting groove 401 and the elastic component 6 is not subjected to other external forces, the compression spring 64 approaches its original length (only under the gravity of the upper plate 63, it is slightly deformed), and the telescopic rod 61 is in an extended state.

[0047] The seedling tray 1, pallet 2, pad 3, support plate 4, drive assembly 5, elastic assembly 6, and dynamic monitor 7 in this application all adopt a detachable connection method, which facilitates on-site assembly, structural replacement after disassembly, transportation, and storage, and has high economic and practical benefits. The specific assembly operation is as follows:

[0048] Operation 1, Combination Figure 4 As shown, first select a pair of support plates 4 and place them apart, but keep their central axes on the same horizontal line; select four drive components 5 and install them on the pair of support plates 4 respectively; select a pair of pads 3 and place a single pad 3 on the top of the pair of drive components 5 that are far apart; then place multiple trays 2 one by one on the top of the pair of pads 3. The first and last two trays 2 are fixed to the pads 3 and drive components 5 together with the first bolt, and the middle tray 2 is fixed to the pads 3 with the second bolt; Supplementary explanation: the pads 3 can be divided into various models according to their length, and the length of the pads 3 is an integer multiple of the width of the trays 2, so that different length models of pads 3 can be used for the installation of different numbers of trays 2. In actual use, the overall length of the installed device can be adjusted according to the size of the actual site.

[0049] Operation 2: After the tray 2 is installed, install a pair of dynamic monitors 7 on the side ends of the first and last pair of trays 2 that are far apart from each other. The dynamic monitors 7 are electrically connected to the external controller. Finally, place the seedling tray 1 filled with substrate and seeds into the rectangular hole 201.

[0050] Operation 3: According to monitoring requirements, install vertical rods 8 on multiple seedling trays 1, such as: combined with Figure 1 and Figure 5 As shown, vertical rods 8 can preferably be installed on the seedling trays 1 at the four corners and the middle position of the device (due to the uniformity of irrigation, local substrate humidity abnormalities are usually regional and related; therefore, by monitoring key points such as the four corners and the center, the overall humidity status can be effectively represented, which is an economical and efficient sampling and detection strategy). Of course, vertical rods 8 can also be added to the seedling trays 1 at other positions as needed. The more vertical rods 8 there are, the more comprehensive the humidity detection will be in the later stage. The vertical rods 8 can be vertically glued to the upper surface of the seedling tray 1 with waterproof adhesive (since the seedling tray 1 is in a static state during the seedling process, there is no need to worry too much about whether the vertical rods 8 will tip over or fall). When not needed, the adhesive layer can be broken to remove the vertical rods 8. Then, the elastic component 6 is placed in the limiting groove 401 on the lower side of the seedling tray 1 where the vertical rods 8 are installed.

[0051] The specific principle of humidity detection is as follows:

[0052] The initial state after installation of this application is as follows: Figure 6As shown in the upper part, under the support of the drive component 5, the elastic component 6 does not contact the lower end of the seedling tray 1 and is not subjected to the gravitational squeezing effect of the seedling tray 1.

[0053] After watering the device for a time T, periodically activate the drive assembly 5 and the dynamic monitor 7 to detect humidity, as follows:

[0054] Step 1, such as Figure 6 As shown in the lower half, the drive component 5 is first activated, causing the pad 3 and tray 2 to move downwards a certain distance (this distance is preset by those skilled in the art). At this time, the seedling tray 1 also moves downwards under its own gravity, and exerts gravity compression on the elastic component 6 through the tray 9, causing the elastic component 6 to shorten and deform. During this process, if the substrate moisture content in different seedling trays 1 is different, their gravity will be different, and the compression force on the elastic component 6 will also be different. Therefore, when each tray 2 moves downwards the same distance, the compression amplitude of the elastic component 6 by seedling trays 1 with different moisture content will be different, and the height position of the seedling tray 1 in the rectangular hole 201 will also be different. For multiple seedling trays 1 with vertical rods 8 installed, the seedling tray 1 with lower moisture content will be at a higher horizontal position, and the top of its upper vertical rod 8 will also be at a higher position. When there is a seedling tray 1 with excessively low substrate moisture content, the top of its upper vertical rod 8 will cross the horizontal plane where the laser detector 74 light is located. Figure 6 (represented by P in the text) The vertical rod 8 on the upper side of the seedling tray 1 with normal substrate moisture did not cross the horizontal plane where the laser detector 74 light is located;

[0055] Step 2: Activate the pair of dynamic monitors 7 again, causing the slide 73 to slowly move along the electric slide rail 72 with the laser detector 74. If one laser detector 74 consistently receives a light signal from the other laser detector 74 throughout the entire movement, it indicates that there is no obstruction between them by the vertical rods 8, and the substrate moisture inside the multiple seedling trays 1 with vertical rods 8 is normal. This further reflects that the moisture content of the remaining seedling trays 1 on this device is within the normal range. If the laser detector 74 does not receive a light signal when it moves to a certain position, it indicates that there is a pair of vertical rods 8. If the light signal is blocked, indicating that some seedling trays 1 have excessively low humidity, the external controller will issue an alarm. Staff can check the seedling trays 1 located between a pair of laser detectors 74 and equipped with vertical rods 8 based on the current position of the laser detectors 74 to further confirm whether their humidity is too low. If their humidity is too low, the surrounding seedling trays 1 should also be checked to determine the cause of the humidity abnormality, which will facilitate later management. The substrate in the seedling trays 1 with excessively low humidity should be irrigated and replenished in a timely manner. In this embodiment, the irrigation method can be the existing sprinkler irrigation method.

[0056] Second embodiment:

[0057] This embodiment adds the following structure based on the first embodiment: Please refer to Figure 7 and Figure 8 The upper end of the tray 2 is provided with a water trough 203. On the side of the tray 2 away from the water trough 203, a pair of water guiding channels 204 communicating with the water trough 203 are provided. The openings of the pair of water guiding channels 204 away from the water trough 203 are respectively fixedly connected to a main water pipe 11 and a secondary water guiding pipe 12. Figure 9 As shown, a pair of insertion holes 205 communicating with the outside are provided on the inner wall of the water tank 203 away from the water guiding channel 204. The pair of insertion holes 205 are respectively matched with the main water pipe 11 and the auxiliary water guiding pipe 12. The length of the main water pipe 11 extending to the outside is less than the length of the auxiliary water guiding pipe 12 extending to the outside. Figure 13 As shown, when the main water pipe 11 and the secondary water pipe 12 on one tray 2 are fully inserted into the socket 205 on the other tray 2, the end of the main water pipe 11 is located inside the water tank 203, and the end of the secondary water pipe 12 passes through the water tank 203 and is inserted into the interior of the water channel 204.

[0058] Please see Figures 8-9 as well as Figures 11-12 Multiple movable plate sleeves 10 are slidably fitted onto the edge of the water tank 203, and each movable plate sleeve 10 corresponds one-to-one with a multiple rectangular hole 201. Each movable plate sleeve 10 includes an actuating plate 1001, a horizontal plate 1002, and a sealing plate 1003. The sealing plate 1003 slides against the inner wall of the water tank 203. The actuating plate 1001 extends to the inner side of the multiple rectangular holes 201 and is fixedly connected to the side end of the support plate 9. The horizontal plate 1002 is fixedly connected to the upper ends of the actuating plate 1001 and the sealing plate 1003. When the driving component 5 drives the tray 2 downward, causing the support plate 9 to move upward inside the rectangular hole 201 under the support of the elastic component 6, the movable plate sleeves 10 will move upward along with the support plate 9 (e.g., ...). Figure 12 (As shown).

[0059] Please see Figure 8 , Figures 10-11 A water inlet pipe 13 is fixedly connected to the inner wall of the water tank 203. The end of the water inlet pipe 13 extends into the interior of the rectangular hole 201 and is fixedly connected to a flexible hose 14. The end of the flexible hose 14 away from the water inlet pipe 13 is fixedly connected to an outlet pipe 15. The water inlet pipe 13 is located on one side of the actuating plate 1001, and the horizontal length of the sealing plate 1003 is greater than the horizontal length of the actuating plate 1001. This makes it so that in the initial state, when the support plate 9 is in contact with the fixed ring 202, the sealing plate 1003 will cover the outside of one side port of the water inlet pipe 13. At this time, even if water is being injected into the water tank 203, the water flow will be difficult to enter the water inlet pipe 13.

[0060] Please see Figure 8The seedling tray 1 has a crisscrossing water channel 101 at its upper end, which surrounds the outside of each hole. The inner wall of the water channel 101 has water holes 102 that communicate with the holes. The water outlet pipe 15 is matched with the water channel 101. To improve the stability of the water outlet pipe 15 in the water channel 101, the water outlet pipe 15 can be set into a T-shaped structure to increase its contact area with the water channel 101, increase friction and movement restriction, so that the water outlet pipe 15 is stably placed at a certain T-shaped intersection in the water channel 101. Water can be injected into the water channel 101 through the water outlet pipe 15, and the water flows into the hole through the water holes 102. In addition, water holes 102 are provided around the hole, and the water flows into the hole from all sides, which can evenly moisten the substrate. Compared with the existing single-point drip irrigation method, it has better irrigation uniformity.

[0061] Please see Figure 10 and Figure 13 The inner wall of the rectangular hole 201 is provided with a second water guide hole 207 for connecting adjacent rectangular holes 201. The inner wall of the rectangular hole 201 near the auxiliary water guide pipe 12 is provided with a first water guide hole 206. The first water guide hole 206 is connected to the adjacent water guide channel 204. The lower inner walls of the first water guide hole 206 and the second water guide hole 207 are flush with the upper end of the fixed ring 202, which facilitates water to enter the rectangular hole 201 to irrigate the seedling tray 1 and also facilitates the drainage of water from the rectangular hole 201. Furthermore, when the tray 9 contacts the upper end of the fixed ring 202, the upper inner walls of the first water guide hole 206 and the second water guide hole 207 are higher than the upper end of the tray 9, making it less likely for the tray 9 to obstruct the flow of water.

[0062] Please see Figure 16 The tray 9 includes a rigid plate 91, with a rubber ring plate 92 fixedly connected to the lower end of the rigid plate 91 and multiple evenly distributed protrusions 93 fixedly connected to the upper end of the rigid plate 91. In the prior art, the lower end face of the holes in the seedling tray 1 is generally provided with holes (the function of the holes is to allow excess water in the holes to flow out, prevent root rot caused by water accumulation, and also to facilitate air circulation, provide sufficient oxygen to the plant roots, and promote their respiration). Therefore, combined with the upper end of the protrusions 93, there is a gap between the seedling tray 1 and the rigid plate 91, which facilitates the flow of air and water through the holes. When the tray 9 is placed on the upper end of the fixed ring 202, under the action of the gravity of the seedling tray 1, the rubber ring plate 92 and the fixed ring 202 are in close contact, which can improve the sealing between the two and make it difficult for the water in the rectangular hole 201 to overflow downward through the contact position between the tray 9 and the fixed ring 202.

[0063] This embodiment, through the addition of the above-mentioned structure, enables it to have three irrigation methods for the seedling tray 1, as detailed below:

[0064] Irrigation Method 1: Top-down single-unit flow irrigation:

[0065] In the first embodiment, when the humidity of the seedling tray 1 is too low, the height of this portion of the seedling tray 1 will be higher than the height of other seedling trays 1 with normal humidity. The support plate 9 on the lower side of this portion of the seedling tray 1 will also be higher than the other support plates 9, and the movable plate sleeve 10 connected to this portion of the support plate 9 will also be higher than the other movable plate sleeves 10. This ensures that the movable plate sleeve 10 with the higher position will no longer cover or obstruct the port of the sealing plate 1003, while the other movable plate sleeves 10 with the lower position will still cover or obstruct the corresponding water inlet pipe 13. At this time, if Figure 13 As shown, water is injected into the main water pipe 11 on the seedling tray 1 at the head position. The water flow is dispersed into each water tank 203 through multiple main water pipes 11. The pair of insertion holes 205 on the seedling tray 1 at the tail position can be sealed with sealing plugs A and B respectively, so that the water in the water tank 203 is not easy to overflow to the outside. In addition, sealing plug A does not contact the adjacent water guide channel 204, and sealing plug B needs to extend into the adjacent water guide channel 204; combined with Figure 12 As shown, for the unblocked water inlet pipe 13, when the water in the water tank 203 accumulates to a sufficient height, it can enter the hose 14, the outlet pipe 15, and the water inlet tank 101 in sequence through the water inlet pipe 13, and finally flow into each hole through the water hole 102 to replenish the substrate in the seedling tray 1 where the humidity is too low. However, for the seedling tray 1 where the humidity is normal and no water replenishment is required, no water replenishment is carried out because the corresponding water inlet pipe 13 is still blocked by the sealing plate 1003.

[0066] Supplementary Explanation 1: After the water level in the water tank 203 reaches the height of the water inlet pipe 13, the flow rate of water entering the main water pipe 11 is reduced so that the water in the water tank 203 is less likely to overflow its top.

[0067] Supplementary Explanation 2: As watering continues, the overall weight of the seedling tray 1 gradually increases, and the pressure exerted on the elastic component 6 increases, causing the elastic component 6 to continue to shorten. At this time, the seedling tray 1 gradually moves down in the rectangular hole 201, and the support plate 9 drives the moving plate sleeve 10 to move down until the moving plate sleeve 10 covers the port of the water inlet pipe 13 again. At this time, watering of the seedling tray 1 is no longer carried out. Finally, the residual water in the water tank 203 can be extracted through the main water pipe 11.

[0068] Irrigation Method Two: Bottom-up Overall Tidal Irrigation Method

[0069] Please see Figure 14 With the device in its initial state, i.e., the tray 9 is placed on the upper end of the fixed ring 202, water is injected into the secondary water guide pipe 12 on the seedling tray 1 at the head position. The water flows through the secondary water guide pipe 12 into the corresponding water guide channel 204, combined with... Figure 14 and Figure 15As shown, water in the water channel 204 flows into the adjacent rectangular holes 201, and finally through multiple water guide holes 207, so that water gradually accumulates in each rectangular hole 201. The water is absorbed by the soil through the holes at the bottom of the seedling tray 1, realizing tidal irrigation. The water level in the rectangular holes 201 is kept in the middle of the seedling tray 1. After a few minutes, the remaining water in the water channel 204 and rectangular holes 201 is discharged through the secondary water guide pipe 12, and irrigation stops.

[0070] Irrigation Method 3: Top-down monolithic irrigation method:

[0071] When using this method, a support plate 4 must first be installed on the underside of each tray 2, and an elastic component 6 must be placed in the limiting groove 401 on the underside of all seedling trays 1. Then, the drive component 5 is activated to retract, causing the tray 2 to move downwards. Supported by the elastic component 6, the tray 9 and seedling tray 1 move upwards inside the rectangular hole 201 until the sealing plate 1003 moves to the upper side of the water inlet pipe 13 port, thus removing the cover and obstruction of the water inlet pipe 13 (e.g., Figure 12 As shown in the figure, similar to the operation in irrigation method one, water is injected into the main water pipe 11 on the seedling tray 1 at the head position. The water flow gathers in the water tank 203 until it flows out into the water tank 101 through the water inlet pipe 13 and the water outlet pipe 15, thus replenishing the substrate in each seedling tray 1 with water.

[0072] Those skilled in the art can choose appropriate irrigation methods as needed. For example, when sowing is just done or when there is an urgent need for even and sufficient water replenishment, a bottom-up overall tidal irrigation method can be used to achieve comprehensive and sufficient irrigation of the substrate. Another example is that during the hardening-off period, when it is necessary to "train" the seedlings by reducing water supply and increasing ventilation, a top-down overall flow irrigation method can be used to maintain sufficient moisture while avoiding substrate saturation that could affect root respiration. Furthermore, none of the above water replenishment methods will cause the seedling leaves to get wet, effectively preventing fungal diseases caused by water droplets on the leaves.

[0073] The above description is merely a preferred embodiment of the present invention; it encompasses all the protection scope of the present invention. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in the present invention, based on the technical solutions and improved concepts of the present invention, should be covered within the protection scope of the present invention.

Claims

1. A melon seedling raising device based on intelligent control, comprising multiple seedling trays (1), characterized in that: It also includes a tray (2), a pad (3) and a support plate (4). There are multiple trays (2), and multiple rectangular holes (201) for placing seedling trays (1) are provided on the trays (2). There are a pair of pads (3) and they are arranged in parallel on the lower side of the trays (2). There are at least a pair of support plates (4) and they are all located on the lower side of the pads (3). A pair of drive components (5) are connected to the upper end of each pair of support plates (4). Multiple trays (2) are arranged in a single row on the upper side of the pads (3). The first and last two trays (2) are connected to the pads (3) and the drive components (5) by a first bolt. The remaining trays (2) are connected to the pads (3) by a second bolt. Both ends of the two trays (2) are connected to a dynamic monitor (7). The dynamic monitor (7) includes a carrier plate (71), an electric slide rail (72), a slide block (73), and a laser detector (74). The carrier plate (71) is connected to the side of the tray (2) by a third bolt. The electric slide rail (72) is fixedly connected to the upper end of the carrier plate (71). The slide block (73) is slidably connected to the upper end of the electric slide rail (72). The laser detector (74) is fixedly connected to the upper end of the slide block (73). The pair of laser detectors (74) are an infrared laser light source and a laser receiver, respectively. The support plate (4) has multiple limiting grooves (401) that correspond one-to-one with the seedling tray (1). Some of the limiting grooves (401) contain elastic components (6). Some of the seedling trays (1) have vertical rods (8) glued to the upper end. The number of elastic components (6) and vertical rods (8) are the same and correspond one-to-one. The upper end of the tray (2) is provided with a water tank (203). On the side of the tray (2) away from the water tank (203), a pair of water guiding channels (204) communicating with the water tank (203) are provided. The opening ends of the pair of water guiding channels (204) away from the water tank (203) are respectively fixedly connected to a main water pipe (11) and a secondary water guiding pipe (12). On the inner wall of the water tank (203) away from the water guiding channels (204), a pair of insertion holes (205) communicating with the outside are provided. The pair of insertion holes (205) are respectively matched with the main water pipe (11) and the secondary water guiding pipe (12). The length of the main water pipe (11) extending to the outside is less than the length of the secondary water pipe (12) extending to the outside. When the main water pipe (11) and the secondary water pipe (12) on one of the trays (2) are fully inserted into the socket (205) on the other tray (2), the end of the main water pipe (11) is located inside the water tank (203), and the end of the secondary water pipe (12) passes through the water tank (203) and is inserted into the interior of the water channel (204). Multiple movable plate sleeves (10) are slidably sleeved on the edge of the water tank (203), and the multiple movable plate sleeves (10) correspond one-to-one with multiple rectangular holes (201). The movable plate sleeve (10) includes an actuating plate (1001), a horizontal plate (1002) and a sealing plate (1003). The sealing plate (1003) slides against the inner wall of the water tank (203). The actuating plate (1001) extends to the inner side of the multiple rectangular holes (201) and is fixedly connected to the side end of the support plate (9). The horizontal plate (1002) is fixedly connected to the upper end of the actuating plate (1001) and the sealing plate (1003).

2. The melon seedling raising device based on intelligent control according to claim 1, characterized in that: A fixed ring (202) is fixedly connected to the inner wall of the rectangular hole (201), and a tray (9) is placed on the upper end of the fixed ring (202). The seedling tray (1) is placed on the upper end of the tray (9).

3. The melon seedling raising device based on intelligent control according to claim 1, characterized in that: The elastic component (6) includes a telescopic rod (61), a lower plate (62), an upper plate (63), and a compression spring (64). The telescopic rod (61) is fixedly connected between the lower plate (62) and the upper plate (63). The compression spring (64) is movably sleeved on the outside of the telescopic rod (61). The lower plate (62) matches the limiting groove (401).

4. The melon seedling raising device based on intelligent control according to claim 1, characterized in that: A water inlet pipe (13) is fixedly connected to the inner wall of the water tank (203). The end of the water inlet pipe (13) extends into the interior of the rectangular hole (201) and is fixedly connected to a flexible hose (14). The end of the flexible hose (14) away from the water inlet pipe (13) is fixedly connected to an outlet pipe (15).

5. The melon seedling raising device based on intelligent control according to claim 4, characterized in that: The upper end of the seedling tray (1) is provided with a crisscrossing water channel (101), and the inner wall of the water channel (101) is provided with a water hole (102) that communicates with the hole on the seedling tray (1). The water outlet pipe (15) is matched with the water channel (101).

6. The melon seedling raising device based on intelligent control according to claim 1, characterized in that: The inner wall of the rectangular hole (201) is provided with a second water guide hole (207) for connecting the adjacent rectangular holes (201), and the inner wall of the rectangular hole (201) near the auxiliary water guide pipe (12) is provided with a first water guide hole (206), which is connected to the adjacent water guide channel (204).

7. The melon seedling raising device based on intelligent control according to claim 2, characterized in that: The tray (9) includes a rigid plate (91), a rubber ring plate (92) is fixedly connected to the lower end of the rigid plate (91), and a plurality of evenly distributed protrusions (93) are fixedly connected to the upper end of the rigid plate (91).

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