A convenient non-destructive rain shelter for rice nitrogen deficiency and compensation experimental fields

Abstract

The present invention relates to the technical field of rice nitrogen deficiency and compensation test equipment, and discloses a portable non-destructive rain shelter for a rice nitrogen deficiency and compensation test field, comprising a base frame, a roller frame fixedly connected to one side of the base frame, a rotating shaft fixedly installed in the middle of the base frame, and a rotating ring movably connected to the rotating shaft, and a rotating bracket fixedly connected to the top of the rotating ring. The present invention avoids damage to the fixed element by adding a fixed pressure rod with a telescopic adjustment distance to the rotating bracket, thereby extending the service life of the awning; the power generated by the rotation when the rotating bracket is unfolded is used to press and fix the awning, making the installation, fixing and disassembly steps of the awning simple and quick, thereby completing the operation of opening the awning on rainy days in a timely manner; rainwater is collected by adding a rain collecting trough, and the accumulation of rainwater in the rain collecting trough is used to press the awning to tighten it, ensuring that the awning is not easily flipped open and damaged in strong winds and rainstorms.

Description

Technical Field

[0001] The invention relates to the technical field of rice nitrogen deficiency and compensation test equipment, in particular to a convenient non-destructive rain shelter for a rice nitrogen deficiency and compensation test field. Background Art

[0002] Selecting appropriate efficient water-saving and nitrogen fertilizer management technologies and screening suitable rice varieties are important measures to ensure national food security. Rice's water demand patterns and water requirements are fundamental parameters for regional water and nitrogen resource allocation and the efficient use of water and nitrogen by crops. To accurately obtain data on rice's water demand patterns and water requirements, according to irrigation test specifications and experimental research requirements, suitable rice variety screening experiments are conducted in experimental fields that are isolated from the influence of natural rainfall from above and groundwater from below. Through different water treatments and regular observations, rice water demand patterns are studied to determine water requirements under different rice growth cycles and different nitrogen fertilizer application rates. During the experiment, waterproof underground waterproofing fabrics are used to isolate groundwater from upward recharge. To isolate the influence of natural precipitation, a rain shelter must be designed to prevent precipitation from falling into the rice experimental fields. After the rain stops, the rain shelter is automatically or manually moved 5 meters away from the experimental fields to ensure the natural effect of sunlight on the rice. Therefore, the installation of a movable rain shelter is of great significance to efficient water-saving and nitrogen fertilizer management technologies in rice experimental fields.

[0003] However, in the existing rice experimental fields, the design structure of the rain shelter is simple. After being supported by a simple steel bracket, the tarpaulin is fixed to the bracket with a retaining spring or screws. The tarpaulin is easily damaged during the fixing process, which affects the service life of the tarpaulin. In order to prevent the damaged tarpaulin from affecting the test results, the old tarpaulin is discarded each time after being removed, which causes waste. In addition, the installation, fixing and removal steps of the existing tarpaulin are cumbersome. In rainy weather or summer rainstorms, the tarpaulin cannot be laid quickly and in time, resulting in untimely rain protection in the experimental fields and affecting the test results. The current experimental field tarpaulin has poor installation firmness and is easily blown over in summer storms or crushed by accumulated rain, causing the test results to be affected by rainfall, which is not conducive to the efficient and accurate implementation of rice nitrogen tests. Summary of the Invention

[0004] The invention aims at the shortcomings of the existing rain shelter for rice nitrogen deficiency experimental fields during use as mentioned in the background technology.

[0005] The present invention provides the following technical solution: a portable non-destructive rain shelter for a rice nitrogen deficiency and compensation experimental field, comprising a base frame, one side of the base frame is fixedly connected to a roller frame, the middle of the base frame is fixedly installed with a rotating shaft, and is movably connected to a swivel through the rotating shaft, the top of the swivel is fixedly connected to a rotating bracket, the rotating bracket can rotate around the rotating shaft in the middle of the swivel, the inner side of the top of the rotating bracket is fixedly connected to a bracket cross bar, the top of the rotating bracket is provided with a telescopic slot, and a fixed pressure rod is movably sleeved through the telescopic slot, the bottom end of the fixed pressure rod is fixedly installed with a sealing plug, the bottom of the telescopic slot is fixedly installed with a bracket spring, the top of the bracket spring is fixedly connected to the bottom end of the fixed pressure rod, a rainproof cloth is movably passed through the middle of the fixed pressure rod and the bracket cross bar, and one side of the rotating bracket is fixedly connected with a piston Cylinder, the piston cylinder is connected to the bottom of the telescopic slot in the middle of the rotating bracket, the middle of the piston cylinder is movably sleeved with a first piston, the middle of the first piston is movably sleeved with a second piston, the other end of the second piston is fixedly connected to the right rotating bracket, and a storage roller is movably installed on one side of the base, the bottom end of the piston cylinder is fixedly connected to a connecting rod cylinder, the top of the connecting rod cylinder is connected to the piston cylinder, the middle of the connecting rod cylinder is movably sleeved with a supporting connecting rod, a slide rail is fixedly installed on the inner side of the rotating bracket, and a rain collecting trough is movably installed through the slide rail, the back of the rain collecting trough is fixedly installed with an extension slot, and the bottom of the front of the rain collecting trough is provided with a water pipe interface for connecting to a water collecting tank to collect rainwater, a connecting rod spring is fixedly installed on the top in the middle of the connecting rod cylinder, and the bottom of the connecting rod spring is fixedly connected to the supporting connecting rod.

[0006] Preferably, a fixing hole is provided on one side of the rotating ring. When all the rotating brackets are in a fan-shaped expanded state, the fixing holes on all the rotating rings are aligned with each other, and a fixing pin is movably sleeved in the middle of the fixing hole.

[0007] Preferably, when the bracket spring is not under stress, the gap between the supporting fixed pressure rod and the bracket cross bar can allow the awning to pass smoothly, and a hook is fixedly installed on one side of the leftmost rotating bracket for fixing the end of the awning.

[0008] Preferably, the piston cylinder, the first piston and the second piston are in an arc shape with a straight arc, and a sealing plug is fixedly installed on one end of the first piston and the second piston, and a sealing plug is fixedly installed on the top end of the supporting connecting rod.

[0009] Preferably, the tail end of the tarpaulin is wrapped around the outer side of the storage roller, and coil springs are fixedly installed at both ends of the storage roller, and the coil springs pull the tarpaulin to rotate completely to the outer ring of the storage roller when not under force.

[0010] Preferably, the bracket springs in the telescopic slots are provided with different elastic coefficients, and the elastic coefficients decrease in the expansion direction of the self-rotating bracket.

[0011] Preferably, the slide rail is installed above the piston cylinder, and the rain collecting trough is located on the inner side of the rotating bracket.

[0012] Preferably, the supporting link is an asymmetric "U" shape, with its short end movably sleeved into the connecting rod tube and the long end fixedly connected to the bottom of the rain collecting trough. In a static and unstressed state, the connecting rod tube pulls the supporting link to keep the rain collecting trough at the upper end of the slide rail.

[0013] The present invention has the following beneficial effects:

[0014] 1. The present invention avoids damage to the tarpaulin caused by the fixing elements by adding a fixed pressure rod with a telescopic adjustable distance to the rotating bracket, thereby extending the service life of the tarpaulin; the power generated by the rotation when the rotating bracket is unfolded is used to press and fix the tarpaulin, making the installation, fixing and disassembly steps of the tarpaulin simple and quick, so that the operation of opening the tarpaulin on rainy days can be completed in time; rainwater is collected by adding a rain collecting trough, and the accumulation of rainwater in the rain collecting trough is used to press the tarpaulin more tightly, ensuring that the tarpaulin is not easily turned over and damaged in strong winds and rainstorms.

[0015] 2. The present invention installs a fixed pressure rod with a telescopic adjustable distance on the rotating bracket, and utilizes the change in the distance between the fixed pressure rod and the bracket cross bar to tighten or loosen the tarpaulin. The clamping fixation of the two avoids the embedded operation of fixing items such as retaining springs or screws, so that the tarpaulin is effectively fixed while avoiding damage to it caused by the fixing elements, thereby extending the service life of the tarpaulin and avoiding unnecessary waste.

[0016] 3. The present invention utilizes the power generated by the rotation when the rotating bracket is unfolded to pull the piston group mounted between the rotating brackets, and utilizes the piston stretching movement between the piston cylinder and the first piston and the second piston to form a negative pressure in the telescopic groove, thereby pressing the fixed pressure rod downward close to the bracket cross bar, thereby pressing and fixing the tarpaulin while unfolding, making the installation, fixing and disassembly steps of the tarpaulin simple and quick, thereby completing the operation of opening the tarpaulin on rainy days in time.

[0017] 4. The present invention collects rainwater by adding a rain collecting trough, and collects excess rainwater for regular irrigation of the test, so that the water content of the test irrigation is more consistent with the content of natural precipitation, which is more conducive to the authenticity of the test. At the same time, the accumulation of rainwater in the rain collecting trough on a rainstorm day presses the rain collecting trough down along the slide rail, so that the fixed pressure rod is pressed downward, avoiding the problem of the tarpaulin being blown away by wind and rain due to loose fixation in rainstorm weather. The greater the water, the greater the downward pressure distance of the rain collecting trough, and the tighter the fixed pressure rod presses the tarpaulin, ensuring that the tarpaulin is not easily turned over and damaged in windy and rainy weather. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention;

[0020] Figure 3 Schematic diagram of the cross-section of the piston cylinder structure of the present invention;

[0021] Figure 4 For the present invention Figure 3 A partial enlarged schematic diagram of the structure at point A in the middle.

[0022] In the figure: 1. Base frame; 101. Roller frame; 2. Swivel; 201. Rotating bracket; 202. Bracket spring; 203. Bracket cross bar; 3. Fixed pressure rod; 4. Rain cover; 401. Storage roller; 5. Piston cylinder; 501. First piston; 502. Second piston; 503. Connecting rod cylinder; 6. Rain collecting trough; 601. Extension groove; 602. Support connecting rod; 603. Connecting rod spring. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0024] See also Figure 1-2A portable, non-destructive rain shelter for a rice nitrogen deficiency and compensation experimental field comprises a base frame 1, a roller frame 101 is fixedly connected to one side of the base frame 1, a rotating shaft is fixedly installed in the middle of the base frame 1, and a swivel 2 is movably connected to the rotating shaft, and a rotating bracket 201 is fixedly connected to the top of the swivel 2. The rotating bracket 201 can rotate around the rotating shaft in the middle of the swivel 2. A fixing hole is provided on one side of the swivel 2. When all the rotating brackets 201 are in a fan-shaped expanded state, the fixing holes on all the swivels 2 are aligned, and a fixing pin is movably sleeved in the middle of the fixing hole. The inner side of the top of the rotating bracket 201 is fixedly connected to the bracket cross bar 203. The top of the rotating bracket 201 A telescopic slot is provided, and a fixed pressure rod 3 is movably connected through the telescopic slot, a sealing plug is fixedly installed on the bottom end of the fixed pressure rod 3, a bracket spring 202 is fixedly installed on the bottom of the telescopic slot, the top end of the bracket spring 202 is fixedly connected to the bottom end of the fixed pressure rod 3, a tarpaulin 4 is movably passed through the middle of the fixed pressure rod 3 and the bracket cross bar 203, when the bracket spring 202 is not under force, the gap between the fixed pressure rod 3 and the bracket cross bar 203 can allow the tarpaulin 4 to pass smoothly, a hook is fixedly installed on one side of the leftmost rotating bracket 201 for fixing the end of the tarpaulin 4, a piston cylinder 5 is fixedly connected to one side of the rotating bracket 201, and the piston The cylinder 5 is connected to the bottom of the telescopic groove in the middle of the rotating bracket 201. The middle of the piston cylinder 5 is movably connected to the first piston 501, and the middle of the first piston 501 is movably connected to the second piston 502. The other end of the second piston 502 is fixedly connected to the right rotating bracket 201. The piston cylinder 5, the first piston 501 and the second piston 502 are in an arc shape with a straight arc, and one end of the first piston 501 and the second piston 502 is fixedly installed with a sealing plug, so that the inner space of the telescopic groove and the piston cylinder 5 is kept sealed. When the rotating bracket 201 rotates and expands in a fan shape, the first piston 501 and the second piston 502 originally retracted in the piston cylinder 5 are 02 are pulled outward in sequence, so that the air pressure in the telescopic groove is reduced, and the negative pressure adsorbs the fixed pressure rod 3 to move downward, thereby pressing the fixed pressure rod 3 downward close to the bracket cross bar 203, thereby pressing and fixing the middle tarpaulin 4, so that the tarpaulin 4 on the awning can be quickly installed and fixed, and the tarpaulin 4 can be quickly fixed without manually adding a retaining ring or other fixing devices. Similarly, when disassembling, the folding rotating bracket 201 is rotated in the opposite direction, so that the first piston 501 and the second piston 502 return to the piston cylinder 5 again, pushing the gas in the telescopic groove, so that it pushes the fixed pressure rod 3 to move upward, thereby realizing the rapid disassembly and cleaning of the tarpaulin 4.

[0025] See also Figure 3The tarpaulin 402 is fixedly mounted on both ends of the storage roller 401, and the tarpaulin 402 is pulled back to the outer ring of the storage roller 401 when the tarpaulin 402 is not under stress. The bracket spring 202 in the telescopic groove is set with different elastic coefficients, and the elastic coefficient decreases once in the expansion direction of the self-rotating bracket 201, ensuring that in the process of rotating the rotating bracket 201 to expand it, the bracket spring 202 in the uppermost group of rotating brackets 201 is first subjected to force and deformed and compressed, so that the fixed pressure rod 3 above it is first pressed and fixed, while there is still space for the tarpaulin 4 to pass through between the other groups of fixed pressure rods 3 and the bracket cross bar 203, until the first group of rotating brackets 201 is rotated. After the first piston 501 and the second piston 502 on one side of the rotating bracket 201 are fully expanded, continue to rotate the rotating bracket 201, pull the bracket spring 202 in the second group of rotating brackets 201 to compress, and pull the fixed pressure rod 3 above it to press down and fix it, so as to ensure that during the expansion process, the tarpaulin 4 between each group of rotating brackets 201 is in an open and taut state, and there is no need to manually stretch and straighten the tarpaulin 4 before fixing it, which greatly reduces the tediousness of installing the tarpaulin 4, and avoids the tarpaulin 4 being manually installed loosely, causing water accumulation on the top to crush and damage the tarpaulin 4, and ensures that the tarpaulin 4 is automatically pulled and straightened during the expansion of the rotating bracket 201, and the fixed pressure rod 3 is tightened one by one, so that the awning is easy to install and not easy to be damaged.

[0026] See also Figure 4The bottom end of the piston cylinder 5 is fixedly connected to the connecting rod cylinder 503, and the top of the connecting rod cylinder 503 is connected to the piston cylinder 5. The middle of the connecting rod cylinder 503 is movably connected with a supporting connecting rod 602. The top of the supporting connecting rod 602 is fixedly installed with a sealing plug to ensure that the piston cylinder 5 is in a sealed state. A slide rail is fixedly installed on the inside of the rotating bracket 201, and the installation position of the slide rail is above the piston cylinder 5. The rotating bracket 201 is movably installed with a rain collecting trough 6 through the slide rail. The rain collecting trough 6 is located on the inside of the rotating bracket 201 and does not affect the normal retraction and extension of the rotating bracket 201. The back of the rain collecting trough 6 is fixedly installed with an extension slot 6 01, used to extend the collection of rainwater flowing down from both sides of the awning 4, a water pipe interface is provided at the bottom of the front of the rain collecting trough 6, which is used to connect to the water collecting box to collect rainwater, and the supporting connecting rod 602 is asymmetrical "U" shape, with its short end movably sleeved into the connecting rod cylinder 503, and the long end fixedly connected to the bottom of the rain collecting trough 6, and a connecting rod spring 603 is fixedly installed on the top of the middle of the connecting rod cylinder 503, and the bottom of the connecting spring 603 is fixedly connected to the supporting connecting rod 602. In the static and unstressed state, the connecting rod cylinder 503 pulls the supporting connecting rod 602 to keep the rain collecting trough 6 at the upper end of the slide rail, and when the rotating bracket 201 is rotated During the process of opening the awning 4, since the rain collecting trough 6 and the top of the slide rail cannot move further upward, the supporting link 602 will not move upward, and the fixed pressure rod 3 will first press down and lock the awning 4. On rainy days, rainwater flows along the awning 4 to the extension grooves 601 on both sides and then enters the rain collecting trough 6, and enters the water collecting tank from the water pipe at the water pipe interface for collection. In heavy rain weather, rainwater accumulates in the rain collecting trough 6, and the baffle on the outside of the rain collecting trough 6 is lower than the inner baffle, so that part of the accumulated rainwater flows into the water collecting tank, and the excess part flows out from the outer baffle to the outside of the experimental field enclosure. At the same time, the rainwater that has accumulated The groove 6 presses the rain collecting trough 6 to move downward along the slide rail, so that the supporting connecting rod 602 moves downward with it, the space inside the piston cylinder 5 increases, and the air pressure decreases, so that the fixed pressure rod 3 is pressed downward, avoiding the problem of the tarpaulin 4 being blown away by wind and rain due to poor fixation in rainstorm weather. The greater the water, the greater the downward pressure distance of the rain collecting trough 6, and the tighter the fixed pressure rod 3 presses the tarpaulin 4, ensuring that the tarpaulin 4 is not easily turned over and damaged in strong winds and rainstorms, ensuring that the test process is not affected by rainwater, and at the same time, the excess rainwater is collected for regular irrigation of the test, so that the water content of the test irrigation is more in line with the content of natural precipitation, which is more conducive to the authenticity of the test.

[0027] The working principle of the method of use of the present invention is as follows:

[0028] When in use, an experimental planting area is marked out in the experimental field, and a waterproof cloth is laid at the bottom thereof to isolate the upward recharge of groundwater. The device is placed above the experimental planting area. On non-rainy days, the rotating bracket 201 is folded and stored, one end of the tarpaulin 4 is wound around the outside of the storage roller 401, and the other end is fixed to the hook on the first group of rotating brackets 201. At this time, the tarpaulin 4 does not affect the normal sunlight of the rice in the experimental field. When it is rainy, the rotating bracket 201 is rotated to unfold it in turn. During the unfolding process, the tarpaulin 4 is pulled out from the storage roller 401 and stretched and laid between the bracket cross bar 203 and the fixed pressure bar 3. Starting from the first group, the first piston 501 and the second piston 502 are rotated. 02 one side is pulled out, so that the negative pressure in the piston cylinder 5 pulls the fixed pressure rod 3 downward, thereby pressing and fixing the tarpaulin 4 in the middle, so that the tarpaulin 4 on the awning is quickly installed and fixed, until the first piston 501 and the second piston 502 on one side of the first group of rotating brackets 201 are fully expanded, and then the rotating bracket 201 is continued to be rotated, and the bracket spring 202 in the second group of rotating brackets 201 is compressed, and the fixed pressure rod 3 above it is pulled down to fix it, thereby ensuring that during the expansion process, the tarpaulin 4 between each group of rotating brackets 201 is in an open and taut state, and there is no need to manually stretch and straighten the tarpaulin 4 before fixing it, which greatly reduces the tediousness of installing the tarpaulin 4. 2. A latch is inserted into the fixing hole on one side to prevent the rotating bracket 201 from being blown away by strong winds in rainy days and causing it to fold. Rainwater flows along the tarpaulin 4 to the extension grooves 601 on both sides and then enters the rain collecting trough 6. The rainwater enters the water collecting tank from the water pipe at the water pipe interface for collection. In heavy rain, rainwater accumulates in the rain collecting trough 6. The rain collecting trough 6 with accumulated rainwater presses the rain collecting trough 6 to move down along the slide rail, causing the supporting connecting rod 602 to move down with it. The space in the piston cylinder 5 increases, the air pressure decreases, and the fixed pressure rod 3 is pressed downward, avoiding the problem that the tarpaulin 4 is blown away by wind and rain due to loose fixation in heavy rain. After the rain stops, the folding rotating bracket 201 is rotated in the opposite direction so that the first piston 501 and the second piston 502 It returns to the piston cylinder 5 again, pushing the gas in the telescopic groove, so that it pushes the fixed pressure rod 3 to move upward, so that it stops squeezing the tarpaulin 4. Since the two ends of the storage roller 401 are fixedly installed with coil springs, and the bracket spring 202 in the telescopic groove is set with different elastic coefficients, during the reverse rotation and folding process, the first piston 501 and the second piston 502 in a group of piston cylinders 5 close to the side of the storage roller 401 are retracted first, and the fixed pressure rod 3 is lifted so that the tarpaulin 4 at this location is not fixed. After that, it is rolled back by the elastic force of the coil springs at both ends of the storage roller 401, so that it can be quickly disassembled and stored, ensuring that the tarpaulin 4 is quickly folded up after the rain stops to avoid it affecting the normal light in the test field.

[0029] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0030] While 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 these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A portable, non-destructive rain shelter for a rice nitrogen deficiency and compensation experimental field, comprising a base frame (1), characterized in that: One side of the base frame (1) is fixedly connected to a roller frame (101), a rotating shaft is fixedly installed in the middle of the base frame (1), and a rotating ring (2) is movably connected to the rotating shaft, the top of the rotating ring (2) is fixedly connected to a rotating bracket (201), the rotating bracket (201) can rotate around the rotating shaft in the middle of the rotating ring (2), the inner side of the top of the rotating bracket (201) is fixedly connected to a bracket cross bar (203), the top of the rotating bracket (201) is provided with a telescopic slot, and a fixed bracket (203) is movably sleeved through the telescopic slot. A fixed pressure rod (3), a sealing plug is fixedly installed at the bottom end of the fixed pressure rod (3), a bracket spring (202) is fixedly installed at the bottom of the telescopic groove, the top end of the bracket spring (202) is fixedly connected to the bottom end of the fixed pressure rod (3), a rainproof cloth (4) is movably passed through the middle of the fixed pressure rod (3) and the bracket cross bar (203), a piston cylinder (5) is fixedly connected to one side of the rotating bracket (201), and the piston cylinder (5) is connected to the bottom of the telescopic groove in the middle of the rotating bracket (201). The middle of the piston cylinder (5) is movably connected to a first piston (501), the middle of the first piston (501) is movably connected to a second piston (502), the other end of the second piston (502) is fixedly connected to the right rotating bracket (201), one side of the base (1) is movably mounted with a storage roller (401), the bottom end of the piston cylinder (5) is fixedly connected to a connecting rod cylinder (503), the top of the connecting rod cylinder (503) is connected to the piston cylinder (5), and the middle of the connecting rod cylinder (503) is movably connected to the right rotating bracket (201). The movable sleeve is connected to a supporting connecting rod (602), a slide rail is fixedly installed on the inner side of the rotating bracket (201), and a rain collecting trough (6) is movably installed through the slide rail, an extension groove (601) is fixedly installed on the back of the rain collecting trough (6), and a water pipe interface is opened at the bottom of the front of the rain collecting trough (6) for connecting to a water collecting tank to collect rainwater, a connecting rod spring (603) is fixedly installed on the top of the middle of the connecting rod tube (503), and the bottom of the connecting rod spring (603) is fixedly connected to the supporting connecting rod (602).

2. The portable non-destructive rain shelter for rice nitrogen deficiency and compensation experimental fields according to claim 1, characterized in that: A fixing hole is provided on one side of the rotating ring (2). When all the rotating brackets (201) are in a fan-shaped expanded state, the fixing holes on all the rotating rings (2) are aligned with each other, and a fixing pin is movably sleeved in the middle of the fixing hole.

3. The portable non-destructive rain shelter for rice nitrogen deficiency and compensation experimental fields according to claim 1, characterized in that: When the bracket spring (202) is not under stress, the gap between the supporting fixed pressure rod (3) and the bracket cross bar (203) allows the tarpaulin (4) to pass smoothly. A hook is fixedly installed on one side of the leftmost rotating bracket (201) for fixing the end of the tarpaulin (4).

4. The portable non-destructive rain shelter for rice nitrogen deficiency and compensation experimental fields according to claim 1, characterized in that: The piston cylinder (5), the first piston (501) and the second piston (502) are in the shape of a straight arc, and a sealing plug is fixedly mounted on one end of the first piston (501) and the second piston (502), and a sealing plug is fixedly mounted on the top end of the supporting connecting rod (602).

5. The portable non-destructive rain shelter for rice nitrogen deficiency and compensation experimental fields according to claim 1, characterized in that: The tail end of the tarpaulin (4) is wound around the outer side of the storage roller (401), and coil springs are fixedly installed at both ends of the storage roller (401), and the coil springs pull the tarpaulin (4) to rotate completely to the outer ring of the storage roller (401) when the coil springs are not under force.

6. The portable non-destructive rain shelter for rice nitrogen deficiency and compensation experimental fields according to claim 1, characterized in that: The bracket spring (202) in the telescopic slot is provided with different elastic coefficients, and the elastic coefficient decreases once in the expansion direction of the self-rotating bracket (201).

7. The portable non-destructive rain shelter for rice nitrogen deficiency and compensation experimental fields according to claim 1, characterized in that: The installation position of the slide rail is above the piston cylinder (5), and the rain collecting trough (6) is located on the inner side of the rotating bracket (201).

8. The portable, non-destructive rain shelter for a rice nitrogen deficiency and compensation experimental field according to claim 1, characterized in that: The supporting connecting rod (602) is in an asymmetric "U" shape, with its short end movably sleeved into the connecting rod tube (503) and its long end fixedly connected to the bottom of the rain collecting trough (6). In a static and unstressed state, the connecting rod tube (503) pulls the supporting connecting rod (602) to keep the rain collecting trough (6) at the upper end of the slide rail.

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