Planting positioning device and method for agricultural science experiment planting

Abstract

The application discloses an agricultural scientific test planting positioning device and a planting positioning method, and relates to the technical field of agricultural machinery, which comprises a first supporting rod and a laser line projector. A mounting seat is rotatably installed at the upper end of the first supporting rod. A supporting plate is fixedly connected to the outer wall of the mounting seat. A ring-shaped water tank is fixedly installed on the upper end surface of the supporting plate. A screw thread is arranged on the inner wall of the ring-shaped water tank. An outer sleeve is fixedly connected to the outer portion of the laser line projector. The outer wall of the outer sleeve is threadedly connected to the inner wall of the ring-shaped water tank. An avoiding hole is formed in the supporting plate and used for allowing the laser line projector to penetrate through. The outer wall of the ring-shaped water tank is connected with a first pipeline and a second pipeline. The first pipeline and the second pipeline are respectively in communication with the water inlet and the water outlet of a circulating pump. The application has the advantages that the laser line is used as a guide line for operation, and the problems of knocking or cutting the pull rope, high ground clearance and poor reference effect caused by the pull rope operation are fundamentally solved.

Description

Technical Field

[0001] This invention relates to the field of agricultural machinery technology, and in particular to a planting positioning device and method for agricultural scientific experimental planting. Background Technology

[0002] In agricultural scientific experiments, planting furrows are typically dug for sowing or transplanting seedlings. If the furrows are not uniform, inconsistent row spacing between crops will result. Since row spacing affects the competition for water and nutrients among crops, inconsistency in row spacing can lead to significant errors in yield and quality, thus conflicting with the minimum margin of error required for scientific research. Therefore, ensuring that planting furrows are dug uniformly is a problem that needs to be solved in agricultural scientific experiments.

[0003] The current common practice for digging planting trenches in agricultural scientific experiments involves inserting bamboo poles or steel stakes at both ends of the trench and stringing a rope between them. Trenching is then carried out using tools such as hoes along the rope to ensure a neat planting trench. However, this method, relying on a rope, has three drawbacks: First, the trenching tools frequently hit the rope, causing the bamboo poles or steel stakes to loosen and the rope to slacken. Second, the trenching tools may even cut the rope, affecting the trenching operation. Third, while increasing the height of the rope and the distance between the rope and the ground can alleviate the above two problems, it reduces the rope's reference value for ensuring a neat trench. Therefore, agricultural scientific experiments urgently need a simple and easy-to-use planting positioning device for agricultural scientific experiments. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a planting positioning device and planting positioning method for agricultural scientific experimental planting, which uses a laser line as a guide line for operation, fundamentally solving the problems of easy knocking or cutting of the rope in rope operation and poor reference effect due to the high height above the ground.

[0005] This invention provides a planting positioning device for agricultural scientific experiments, comprising a first support rod and a laser line projector; the outer wall of the first support rod is threaded, and two locking nuts are installed opposite each other at its upper end; a mounting base is installed between the two locking nuts; a support plate is fixedly connected to the outer wall of the mounting base; an annular water tank is fixedly installed on the upper end face of the support plate; the inner wall of the annular water tank is threaded; an outer sleeve is fixedly fitted around the laser line projector; the outer wall of the outer sleeve is threadedly connected to the inner wall of the annular water tank; an clearance hole is provided on the support plate for the laser line projector to pass through; a first pipe and a second pipe are respectively connected to the outer wall of the annular water tank; the first pipe and the second pipe are respectively connected to the inlet and outlet of a circulating pump.

[0006] Furthermore, a chiller is also installed between the second pipe and the circulation pump; the first pipe and the second pipe are located on opposite sides.

[0007] Furthermore, it also includes a generator; the circulating pump, chiller, and generator are all mounted on a movable trolley. The laser projector is plug-in type; the generator can provide power to the circulating pump, chiller, and laser projector.

[0008] Furthermore, it also includes a second support rod; a connecting plate is fixedly connected to the outer wall of the second support rod; an indicator plate is fixedly installed at one end of the connecting plate; a vertical indicator line is provided on the indicator plate; a through groove is opened on the indicator plate; a roller is rotatably installed on the first support rod; a sunshade cloth is wrapped around the roller; a pressure plate is detachably installed on the side of the indicator plate near the connecting plate by fastening screws; one end of the sunshade cloth can pass through the through groove and is fastened and clamped between the pressure plate and the indicator plate.

[0009] Furthermore, a first fixing plate is fixedly installed on the lower part of the outer wall of the first support rod; a coil spring is installed on the outside of the first support rod; the coil roller is installed on the coil spring; the end of the inner ring of the coil spring is fixedly connected to the first support rod, and the end of the outer ring is provided with a second bend; a second sliding groove is opened on the inner wall of the coil roller, which is slidably connected to the second bend; a bearing is installed between the outer wall of the first support rod and the inner wall of the coil roller.

[0010] Furthermore, a rigid plate is fixedly connected to one end of the sunshade cloth; the rigid plate is sandwiched between the pressure plate and the indicator plate; and a through hole is provided on the rigid plate for fastening screws to pass through.

[0011] Furthermore, the inner ring of the coil spring has a first bend at its end; the outer wall of the first support rod has a first groove that slides in connection with the first bend.

[0012] Furthermore, a screw is installed between the inner ring of the coil spring and the outer wall of the first support rod.

[0013] Furthermore, both the first support rod and the second support rod are fitted with scales on their outer walls.

[0014] Furthermore, the annular water tank has a water inlet at its upper end, and a plug can be detachably installed inside the water inlet.

[0015] Furthermore, a handle is fixed to the top of the jacket.

[0016] Furthermore, the connecting plate and the indicator plate are detachably connected.

[0017] Furthermore, a wing plate is fixedly connected to the lower part of the outer wall of the annular water tank, and the wing plate is detachably installed on the upper end face of the support plate by screws.

[0018] Furthermore, the scale is flexible.

[0019] Furthermore, both the outer walls of the first support rod and the second support rod are fixed with retaining rings, and one end of the scale is attached to an openable hook; the openable hook is connected to the retaining ring.

[0020] Furthermore, a second fixing plate is fixedly connected to the lower part of the outer wall of the second support rod.

[0021] Furthermore, both the bottom of the first support rod and the second support rod are fixed with spikes.

[0022] This invention also provides a method for planting location in agricultural scientific experiments, comprising the following steps:

[0023] S1. Assembly: Install the bearing, coil spring, and roller with the sunshade cloth wrapped around it in sequence. Fill the annular water tank with water, put the outer sleeve into the annular water tank, install the annular water tank on the support plate, and then install the mounting base on the first support rod; install the indicator plate on the connecting plate and remove the pressure plate.

[0024] S2. Insert stakes and pull the shade cloth: Locate the two ends of the first row of planting furrows, insert the assembled first and second support rods into the two points respectively, and adjust the direction of the indicator plate so that it is directly facing the first support rod; pull the shade cloth so that the rigid plate connected to one end of the shade cloth passes through the through groove; then press the pressure plate on the rigid plate and install the fastening screws so that the rigid plate is firmly clamped between the pressure plate and the indicator plate.

[0025] S3. Debugging: Turn on the laser projector. The laser projector emits a visible laser line in a straight line. The laser line is projected onto the ground and extends towards the indicator board. It is refracted after encountering the indicator board. Determine whether the laser line's emission direction needs to be adjusted based on whether the laser line's position on the indicator board coincides with the indicator line. When the laser line's emission direction needs to be adjusted, you can loosen the locking nut and rotate the mounting base or the outer sleeve until the laser line projected on the indicator board coincides with the indicator line.

[0026] S4. Trenching: Turn on the circulating pump and the chiller. The circulating pump draws water from the annular water tank into the chiller, which cools the circulating water. The cooled water flows into the annular water tank to cool the laser line projector. The laser line projected on the ground is used as a guide line to dig trenches, completing the single-row trenching operation.

[0027] S5, Row Break: Use a ruler to determine the positions of the two ends of the next row of planting furrows according to the predetermined row spacing; then follow steps S2-S4 to complete the furrowing of the second row, and repeat this process until all rows of furrowing are completed.

[0028] S6. Reverse direction: Rotate the assembled first and second support rods 90 degrees, and insert the assembled first and second support rods into both sides of the planting trench respectively. Adjust the angle of the laser line projector according to steps S2-S3.

[0029] S7. Dig planting pits: Dig planting pits one by one at the intersection of the laser line projected on the ground in step S6 and all planting trenches, until the first row of planting pits is completed.

[0030] S8. Change row: Determine the two end positions of the next row of planting pits according to the predetermined plant spacing using a ruler. Similarly, dig planting pits according to the intersection of the laser line projected on the ground and all planting trenches, until the second row of planting pits is completed. Repeat this process until all planting pits are dug.

[0031] Beneficial effects of this invention:

[0032] This invention mounts a laser line projector into an annular water tank via an outer casing, and then onto a first support rod via a support plate and mounting base. The laser line projector projects a visible laser line onto the ground. The installation angle of the laser line projector can be adjusted by rotating the mounting base or the outer casing, thereby adjusting the direction of the projected laser line. A circulation pump circulates water within the annular water tank, cooling the laser line projector. This invention utilizes a laser line projected onto the ground, and the direction of the laser line can be adjusted. During trenching, the laser line can be used as a guide line, fundamentally solving the problems of accidental damage or breakage of ropes in rope-operated trenching, as well as the poor reference value due to its high elevation above the ground. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall structure of Example 1;

[0034] Figure 2 for Figure 1 A structural schematic diagram of the first support rod and related components;

[0035] Figure 3 This is a simplified structural diagram of the circulating pump, chiller, generator, and movable trolley in Example 1;

[0036] Figure 4 This is a top view of the first support rod, the roller, and the coil spring in Example 1;

[0037] Figure 5 for Figure 1 Enlarged view of the structure at point B in the middle;

[0038] Figure 6 This is a front view of the connecting plate in Example 1;

[0039] Figure 7 This is a three-dimensional structural diagram of the connecting plate and adjacent components in Example 1;

[0040] Figure 8 for Figure 1 Enlarged view of the structure at point A in the middle.

[0041] In the diagram, 1-first support rod, 101-first chute, 2-mounting base, 3-support plate, 4-laser projector, 5-outer casing, 6-annular water tank, 7-circulating pump, 8-first pipe, 9-second pipe, 10-refrigeration unit, 11-generator, 12-movable trolley, 13-wing plate, 14-cap, 15-handle, 16-first fixing plate, 17-roller, 1701-second chute, 18- Coil spring, 1801-First bend, 1802-Second bend, 19-Bearing, 20-Second support rod, 21-Second fixing plate, 22-Connecting plate, 23-Indicator plate, 24-Indicator line, 25-Through groove, 26-Pressure plate, 27-Scale, 28-Spike, 29-Fixing ring, 30-Openable hook, 31-Sunshade cloth, 32-Rigid plate; 33-Fasting screw; 34-Locking nut. Detailed Implementation

[0042] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding the present invention and do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0043] Example 1

[0044] A planting positioning device for agricultural scientific experimental planting, such as Figure 1-8 As shown, it includes a first support rod 1 and a laser projector 4; the outer wall of the first support rod 1 is threaded, and two locking nuts 34 are installed opposite each other at its upper end; a mounting base 2 is installed between the two locking nuts 34; a support plate 3 is fixedly connected to the outer wall of the mounting base 2; an annular water tank 6 is fixedly installed on the upper end face of the support plate 3; the inner wall of the annular water tank 6 is threaded; an outer sleeve 5 is fixedly fitted on the outside of the laser projector 4; the outer wall of the outer sleeve 5 is threadedly connected to the inner wall of the annular water tank 6; a clearance hole is opened on the support plate 3 for the laser projector 4 to pass through; a first pipe 8 and a second pipe 9 are respectively connected to the outer wall of the annular water tank 6; the first pipe 8 and the second pipe 9 are respectively connected to the inlet and outlet of the circulating pump 7.

[0045] The aforementioned planting positioning device for agricultural scientific experiments uses an outer casing 5 to mount a laser line projector 4 into an annular water tank 6. The laser line projector 4 is then mounted on a first support rod 1 via a support plate 3 and a mounting base 2. The laser line projector 4 projects a visible laser line onto the ground. The installation angle of the laser line projector 4 can be adjusted by rotating the mounting base 2 or the outer casing 5, thereby adjusting the direction of the laser line projected onto the ground. A circulating pump 7 circulates the water in the annular water tank 6, thus cooling the laser line projector 4. By using the visible laser line projected onto the ground by the laser line projector 4, and by adjusting the direction of the laser line, the laser line can be used as a guide line during trenching operations. This fundamentally solves the problems of accidental damage or breakage of ropes during rope-pulling operations, as well as the poor reference value due to its high height above the ground.

[0046] Specifically, to improve the cooling effect, a chiller 10 is installed between the second pipe 9 and the circulating pump 7; the first pipe 8 and the second pipe 9 are located on opposite sides. The laser projector 4 easily generates heat during prolonged operation, and the resulting temperature rise can affect its service life. The chiller 10 cools the circulating water, and the cooled water flows into the annular water tank 6, effectively improving the cooling effect on the laser projector 4.

[0047] Specifically, it also includes a generator 11; the circulating pump 7, the chiller 10, and the generator 11 are all mounted on the movable trolley 12. The laser projector 4 is plug-in type; the generator 11 can provide power to the circulating pump 7, the chiller 10, and the laser projector 4.

[0048] Specifically, it also includes a second support rod 20; a connecting plate 22 is fixedly connected to the outer wall of the second support rod 20; an indicator plate 23 is fixedly installed at one end of the connecting plate 22; a vertical indicator line 24 is provided on the indicator plate 23; a through groove 25 is opened on the indicator plate 23; a roller 17 is rotatably installed on the first support rod 1; a sunshade cloth 31 is wrapped around the roller 17; a pressure plate 26 is detachably installed on the side of the indicator plate 23 near the connecting plate 22 by fastening screws 33; one end of the sunshade cloth 31 can pass through the through groove 25 and is fastened and clamped between the pressure plate 26 and the indicator plate 23. When the laser projector 4 is turned on, it emits a visible, linear laser line. This line projects onto the ground and extends towards the indicator plate 23. Upon encountering the indicator plate 23, it refracts. The position of the laser line on the indicator plate 23 is checked against the indicator line 24 to determine if the laser's emission direction needs adjustment. If adjustment is necessary, the mounting base 2 or the outer casing 5 can be rotated until the projected laser line on the indicator plate 23 coincides with the indicator line 24. To improve the laser's visibility outdoors, a sunshade cloth 31 is used to block direct sunlight, effectively reducing light intensity and enhancing visibility. The indicator plate 23 and the pressure plate 26 work together to hold the sunshade cloth 31 in place. Furthermore, the indicator line 24 on the indicator plate 23 serves to detect whether the laser's direction is correct.

[0049] Specifically, a first fixing plate 16 is fixedly installed on the lower part of the outer wall of the first support rod 1; a coil spring 18 is installed on the outside of the first support rod 1; a roller 17 is installed on the coil spring 18; the end of the inner ring of the coil spring 18 is fixedly connected to the first support rod 1, and the end of the outer ring is provided with a second bending portion 1802; a second sliding groove 1701 is opened on the inner wall of the roller 17, which is slidably connected to the second bending portion 1802; a bearing 19 is installed between the outer wall of the first support rod 1 and the inner wall of the roller 17. The coil spring 18 can provide a certain tension for the sunshade cloth 31, so that the sunshade cloth 31 remains flat; the bearing 19 can improve the smoothness of the rotation of the roller 17. When inserting the stake, the first support rod 1 can be driven downward by pressing or tapping the first fixing plate 16; after insertion, the first fixing plate 16 can also provide support to prevent the first support rod 1 from tilting. In addition, the first fixing plate 16 also serves to support the bearing 19 and the roller 17.

[0050] Specifically, in order to facilitate the clamping of the sunshade cloth 31, a rigid plate 32 is fixedly connected to one end of the sunshade cloth 31; the rigid plate 32 is clamped between the pressure plate 26 and the indicator plate 23; and a through hole is provided on the rigid plate 32 for the fastening screw 33 to pass through.

[0051] Specifically, in order to facilitate the disassembly and assembly of the coil spring 18, the end of the inner ring of the coil spring 18 is provided with a first bending portion 1801; the outer wall of the first support rod 1 is provided with a first sliding groove 101 that is slidably connected to the first bending portion 1801.

[0052] Specifically, a screw is also installed between the inner ring of the coil spring 18 and the outer wall of the first support rod 1.

[0053] Specifically, in order to facilitate quick determination of the location of the next row of planting furrows and the next row of planting pits, the outer walls of the first support rod 1 and the second support rod 20 are both equipped with scale rulers 27 with graduation lines.

[0054] Specifically, the upper end of the annular water tank 6 is provided with a water inlet, and a plug 14 can be detachably installed inside the water inlet.

[0055] Specifically, for ease of installation, a handle 15 is fixed to the top of the outer casing 5.

[0056] Specifically, the connecting plate 22 and the indicator plate 23 are detachably connected.

[0057] Specifically, a wing plate 13 is fixed to the lower part of the outer wall of the annular water tank 6, and the wing plate 13 is detachably installed on the upper end face of the support plate 3 by screws.

[0058] Specifically, the 27-inch scale is flexible.

[0059] Specifically, the outer walls of the first support rod 1 and the second support rod 20 are both fixed with fixing rings 29, and one end of the scale 27 is attached to the openable hook 30; the openable hook 30 is connected to the fixing ring 29.

[0060] Specifically, a second fixing plate 21 is fixedly connected to the lower part of the outer wall of the second support rod 20. When inserting the stake, the second support rod 20 can be driven downward by pressing or tapping the second fixing plate 21; after insertion, the second fixing plate 21 can also play a supporting role to prevent the second support rod 20 from tilting.

[0061] Specifically, the bottom of both the first support rod 1 and the second support rod 20 are fixed with spikes 28.

[0062] Example 2

[0063] A method for planting location in agricultural scientific experiments, comprising the following steps:

[0064] S1. Assembly: Install the bearing 19, coil spring 18, and roller 17 with the sunshade cloth 31 wrapped around it in sequence. Fill the annular water tank 6 with water, put the outer jacket 5 into the annular water tank 6, install the annular water tank 6 on the support plate 3, and then install the mounting base 2 on the first support rod 1; install the indicator plate 23 on the connecting plate 22, and remove the pressure plate 26.

[0065] S2. Insert stakes and pull the shade cloth: Locate the two ends of the first row of planting furrows, insert the assembled first support rod 1 and second support rod 20 into the two points respectively, and adjust the direction of the indicator plate 23 so that it is directly facing the first support rod 1; pull the shade cloth 31 so that the rigid plate 32 connected to one end of the shade cloth 31 passes through the through groove 25; then press the pressure plate 26 on the rigid plate 32 and install the fastening screws 33 so that the rigid plate 32 is firmly clamped between the pressure plate 26 and the indicator plate 23;

[0066] S3. Debugging: Turn on the laser projector 4. The laser projector 4 emits a visible laser line in a straight line. The laser line is projected onto the ground and extends towards the direction of the indicator plate 23. It is refracted after encountering the indicator plate 23. The laser line emission direction needs to be adjusted based on whether the position of the laser line on the indicator plate 23 coincides with the indicator line 24. When the laser line emission direction needs to be adjusted, the locking nut 34 can be loosened and the mounting base 2 can be rotated, or the outer sleeve 5 can be rotated until the laser line projected on the indicator plate 23 coincides with the indicator line 24.

[0067] S4. Trenching: Turn on the circulating pump 7 and the chiller 10. The circulating pump 7 pumps the water in the annular water tank 6 into the chiller 10. The chiller 10 cools the circulating water. The cooled water flows into the annular water tank 6 to cool the laser line projector 4. The laser line projected on the ground is used as a guide line to dig trenches and complete the single-row trenching operation.

[0068] S5, Row Change: Determine the positions of the two ends of the next row of planting furrows according to the predetermined row spacing using ruler 27; then complete the furrowing of the second row according to steps S2-S4, and repeat the cycle until all rows of furrowing are completed.

[0069] S6. Reverse direction: Rotate the assembled first support rod 1 and second support rod 20 by 90 degrees, and insert the assembled first support rod 1 and second support rod 20 into both sides of the planting trench respectively. Adjust the angle of the laser line projector 4 according to the steps of S2-S3.

[0070] S7. Dig planting pits: Dig planting pits one by one at the intersection of the laser line projected on the ground in step S6 and all planting trenches, until the first row of planting pits is completed.

[0071] S8. Change row: Determine the two end positions of the next row of planting pits according to the predetermined plant spacing using the scale 27. Similarly, dig planting pits according to the intersection of the laser line projected on the ground and all planting trenches, until the second row of planting pits is completed. Repeat this process until all planting pits are dug.

[0072] Working principle of the invention:

[0073] In use, first locate the two ends of the first planting furrow, and insert the assembled first support rod 1 and second support rod 20 into the two points respectively. Adjust the direction of the indicator plate 23 so that it faces the first support rod 1. Pull the shade cloth 31 so that the rigid plate 32 connected to one end of the shade cloth 31 passes through the through groove 25. Then press the pressure plate 26 onto the rigid plate 32 and install the fastening screws 33 to secure the rigid plate 32 between the pressure plate 26 and the indicator plate 23. Turn on the laser line projector 4, the circulation pump 7, the refrigerator 10, and the generator 11. The generator 11 provides power to the laser line projector 4, the circulation pump 7, and the refrigerator 10. The laser line projector 4 emits a visible straight laser line. The laser line is projected onto the ground and extends towards the indicator plate 23. After encountering the indicator plate 23, it is refracted. Based on whether the position of the laser line on the indicator plate 23 coincides with the indicator line 24, it is determined whether the emission direction of the laser line needs to be adjusted. When the laser line emission direction needs to be adjusted, the locking nut 34 can be loosened, and the mounting base 2 or the outer sleeve 5 can be rotated until the laser line projected on the indicator plate 23 coincides with the indicator line 24. The circulating pump 7 pumps water from the annular water tank 6 to the chiller 10, which cools the circulating water. The cooled water then flows back into the annular water tank 6 to cool the laser line projector 4. Using the laser line projected on the ground as a guide line for trenching or planting pit digging fundamentally solves the problems of easy knocking or cutting of the rope and poor reference effect due to the high height above the ground in rope-pulling operations.

[0074] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and these variations still fall within the protection scope of the present invention.

Claims

1. A planting positioning device for agricultural scientific experimental planting, characterized in that: The system includes a first support rod (1) and a laser projector (4); the outer wall of the first support rod (1) is threaded, and two locking nuts (34) are installed opposite each other at its upper end; a mounting base (2) is installed between the two locking nuts (34); a support plate (3) is fixedly connected to the outer wall of the mounting base (2); an annular water tank (6) is fixedly installed on the upper end face of the support plate (3); the inner wall of the annular water tank (6) is threaded; an outer sleeve (5) is fixedly fitted on the outside of the laser projector (4); the outer wall of the outer sleeve (5) is threadedly connected to the inner wall of the annular water tank (6); a clearance hole is opened on the support plate (3) for the laser projector (4) to pass through; a first pipe (8) and a second pipe (9) are respectively connected to the outer wall of the annular water tank (6); the first pipe (8) and the second pipe (9) are respectively connected to the inlet and outlet of the circulating pump (7).

2. The planting positioning device for agricultural scientific experimental planting according to claim 1, characterized in that: A chiller (10) is also installed between the second pipe (9) and the circulating pump (7); the first pipe (8) and the second pipe (9) are located on opposite sides.

3. The planting positioning device for agricultural scientific experimental planting according to claim 2, characterized in that: It also includes a generator (11); the circulating pump (7), the chiller (10) and the generator (11) are all mounted on a movable trolley (12).

4. The planting positioning device for agricultural scientific experimental planting according to claim 1, characterized in that: It also includes a second support rod (20); a connecting plate (22) is fixedly connected to the outer wall of the second support rod (20); an indicator plate (23) is fixedly installed at one end of the connecting plate (22); a vertical indicator line (24) is provided on the indicator plate (23); a through groove (25) is opened on the indicator plate (23); a roller (17) is rotatably installed on the first support rod (1); a sunshade cloth (31) is wrapped around the roller (17); a pressure plate (26) is detachably installed on the side of the indicator plate (23) near the connecting plate (22) by fastening screws (33); one end of the sunshade cloth (31) can pass through the through groove (25) and be fastened and clamped between the pressure plate (26) and the indicator plate (23).

5. The planting positioning device for agricultural scientific experimental planting according to claim 4, characterized in that: A first fixing plate (16) is fixedly installed on the lower part of the outer wall of the first support rod (1); a coil spring (18) is installed on the outside of the first support rod (1); the coil roller (17) is installed on the coil spring (18); the end of the inner ring of the coil spring (18) is fixedly connected to the first support rod (1), and the end of the outer ring is provided with a second bending part (1802); the inner wall of the coil roller (17) is provided with a second sliding groove (1701) that is slidably connected to the second bending part (1802); a bearing (19) is installed between the outer wall of the first support rod (1) and the inner wall of the coil roller (17).

6. The planting positioning device for agricultural scientific experimental planting according to claim 5, characterized in that: One end of the sunshade cloth (31) is fixedly connected to a rigid plate (32); the rigid plate (32) is sandwiched between the pressure plate (26) and the indicator plate (23); the rigid plate (32) has a through hole for fastening screws (33) to pass through.

7. The planting positioning device for agricultural scientific experimental planting according to claim 5, characterized in that: The inner ring of the coil spring (18) is provided with a first bend (1801) at its end; the outer wall of the first support rod (1) is provided with a first groove (101) that is slidably connected to the first bend (1801).

8. The planting positioning device for agricultural scientific experimental planting according to claim 5 or 7, characterized in that: A screw is also installed between the inner ring of the coil spring (18) and the outer wall of the first support rod (1).

9. The planting positioning device for agricultural scientific experimental planting according to claim 4, characterized in that: Both the first support rod (1) and the second support rod (20) have scale rulers (27) with graduation lines installed on their outer walls.

10. A method for positioning planting in agricultural scientific experiments, characterized by: The method requires the use of the planting positioning device for agricultural scientific experiments as described in any one of claims 1-9, and includes the following steps: S1. Assembly: Install the bearing (19), coil spring (18), and the roller (17) wrapped with sunshade cloth (31) in sequence. Fill the annular water tank (6) with water, put the outer jacket (5) into the annular water tank (6), install the annular water tank (6) on the support plate (3), and then install the mounting base (2) on the first support rod (1); install the indicator plate (23) on the connecting plate (22), and remove the pressure plate (26); S2, Insert stakes and pull the shade cloth: Find the positions of the two ends of the first row of planting furrows, insert the assembled first support rod (1) and second support rod (20) into the two positions respectively, adjust the direction of the indicator plate (23) so that it faces the first support rod (1); pull the shade cloth (31) so that the rigid plate (32) connected to one end of the shade cloth (31) passes through the through groove (25); then press the pressure plate (26) on the rigid plate (32) and install the fastening screw (33) so that the rigid plate (32) is firmly clamped between the pressure plate (26) and the indicator plate (23); S3, Debugging: Turn on the laser projector (4). The laser projector (4) emits a visible laser line in a straight line. The laser line is projected onto the ground and extends towards the indicator plate (23). It is refracted after encountering the indicator plate (23). The laser line's emission direction needs to be adjusted based on whether the laser line's position on the indicator plate (23) coincides with the indicator line (24). When the laser line's emission direction needs to be adjusted, the locking nut (34) can be loosened, the mounting base (2) can be rotated, or the outer sleeve (5) can be rotated until the laser line projected on the indicator plate (23) coincides with the indicator line (24). S4. Trenching: Turn on the circulating pump (7) and the chiller (10). The circulating pump (7) pumps the water in the annular water tank (6) into the chiller (10). The chiller (10) cools the circulating water. The cooled water flows into the annular water tank (6) to cool the laser line projector (4). The laser line projected on the ground is used as a guide line to dig trenches and complete the single-row trenching operation. S5, line break: Use the ruler (27) to determine the positions of the two ends of the planting furrow in the next row according to the predetermined row spacing; then follow the steps of S2-S4 to complete the furrowing of the second row, and repeat in this way until the furrowing of all rows is completed. S6. Reverse direction: Reverse the assembled first support rod (1) and second support rod (20) by 90 degrees, and insert the assembled first support rod (1) and second support rod (20) into the two sides of the planting ditch respectively. Adjust the angle of the laser line projector (4) according to the steps of S2-S3. S7. Dig planting pits: Dig planting pits one by one at the intersection of the laser line projected on the ground in step S6 and all planting trenches, until the first row of planting pits is completed. S8. Change row: Determine the two end positions of the next row of planting pits according to the predetermined plant spacing using a ruler (27). Similarly, dig planting pits according to the intersection of the laser line projected on the ground and all planting trenches until the second row of planting pits is completed. Repeat this process until all planting pits are dug.

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