Agricultural planting seedling irrigation device

Abstract

The invention relates to the technical field of seedling irrigation, in particular to an agricultural planting seedling irrigation device which comprises a supporting table and an irrigation unit. When the outside temperature is high, moisture in nursery soil volatilizes fast, a graphite heat conduction ring conducts heat to a cylinder sleeve, gas in the graphite heat conduction ring expands, a piston moves in the direction away from a water conveying pipe along the inner wall of the cylinder sleeve, a plunger is driven to move along the inner wall of a sliding hole, and the flow speed of an aqueous solution in a water storage tank passing through a water channel is increased; when the temperature is reduced, the volatilization speed of water in the nursery soil is reduced, and the external temperature is reduced, so that the temperature of the graphite heat conduction ring and the temperature of the cylinder sleeve are reduced, and therefore, the volume of gas in the cylinder sleeve shrinks, and the piston moves towards the direction close to the water conveying pipe along the interior of the cylinder sleeve to drive the plunger to move along the inner wall of the cylinder sleeve; the flow rate of the water solution in the water storage tank is reduced through the water channel, so that the irrigation water quantity for the soil is reduced, and the loss of the water solution is avoided.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of seedling irrigation, and particularly relates to an agricultural seedling irrigation device. BACKGROUND

[0002] Periodic irrigation is very important during agricultural seedling culture, and can ensure sufficient water in plants and soil, meet the normal requirements of plants in the growth process, and help promote the root growth of Xanthoceras sorbifolia Bunge seedlings, photosynthesis and nutrient absorption, and shorten the growth cycle of the seedlings. According to a Chinese patent with the application publication number 202210854170.0, a vegetable planting drip irrigation device and a drip irrigation method thereof are disclosed, which adopts a sponge layer to wrap a drip irrigation water outlet end, keeps water drops uniformly applied to the root of the vegetable, and avoids the blockage of the water outlet end caused by mud, branches and leaves and other sundries. A pressure boosting device is used to supply pressure to the water storage tank, and a pressure measuring device is used to measure the air pressure in the water storage tank, so that the water storage tank maintains stable water supply pressure and is used for implementing constant drip irrigation work. However, the irrigation device cannot automatically regulate the amount of irrigation water solution according to the external environment temperature. In fact, the water evaporation speed in the soil is much higher when the external environment temperature is high than when the external environment temperature is low. Therefore, the irrigation speed of the water amount in the soil needs to be adaptively adjusted. Therefore, the present application provides an agricultural seedling irrigation device to solve the above technical problems. SUMMARY

[0003] The application provides the following technical scheme: an agricultural seedling irrigation device, comprising: a support table and an irrigation unit, wherein the irrigation unit is fixedly arranged on the top of the support table; The irrigation unit comprises: a support cylinder, which is fixedly arranged at both ends of the top of the support table, and a guide groove is formed in the side wall of the support cylinder; a water storage tank, which is fixedly installed on the top of the support cylinder; a water delivery pipe, which is fixedly installed at the bottom of the water storage tank, and a water channel is vertically and longitudinally formed in the water delivery pipe; a sliding hole, which is vertically and longitudinally formed on the upper portion of the outer wall of the water delivery pipe and is in communication with the water channel; a plunger, which is symmetrically and slidably installed in the sliding hole with the center of the water delivery pipe as the center; a push rod, which is fixedly installed at the end of the plunger away from the water delivery pipe; a cylinder sleeve, which is fixedly installed in the support cylinder and is concentric with the push rod; a piston, which is fixedly installed at the end of the outer wall of the push rod away from the plunger and is slidably installed on the inner wall of the cylinder sleeve; a sliding cover, which is installed on the outer wall of the end of the cylinder sleeve close to the water delivery pipe.

[0004] As a preferred scheme of the present application, the water delivery pipe runs through the inside of the supporting cylinder, the diameter of the water channel is the same as that of the sliding hole, and a sealing ring is arranged between the plunger and the sliding hole.

[0005] As a preferred scheme of the present application, the irrigation unit further comprises: The spring is arranged inside the sliding cover and fixedly installed between the end of the cylinder sleeve and the inner side end surface of the sliding cover, the push rod is movably arranged through the side surface of the sliding cover, and a sealing ring is arranged on the inner wall of the through hole of the sliding cover and used for air sealing between the sliding cover and the push rod.

[0006] As a preferred scheme of the present application, a plurality of constant pressure holes are arranged at equal distances on the end of the cylinder sleeve away from the sliding cover, a metal support one is fixedly installed at the bottom of the water storage tank, the cylinder sleeve runs through the inside of the metal support one, and the cylinder sleeve is fixedly installed with the metal support one through bolts.

[0007] As a preferred scheme of the present application, a supporting plate is fixedly installed at the bottom of the supporting cylinder and fixedly installed with the top of the supporting table through bolts, and a graphite heat conducting ring is arranged on the outer wall of the cylinder sleeve and located at the periphery of the water storage tank.

[0008] As a preferred scheme of the present application, a dustproof cover is detachably installed at the top of the water storage tank through a plurality of angle-distributing fasteners, and the dustproof cover is used for sealing the top of the water storage tank.

[0009] As a preferred scheme of the present application, the cut-off unit comprises: The metal support two is fixedly installed at the side of the sliding cover away from the constant pressure hole and slidably arranged at the periphery of the push rod. The push pin is fixedly installed at the end of the side of the metal support two away from the cylinder sleeve; The metal support three is slidably arranged in the guide groove; The push block is fixedly installed at both ends of the bottom of the metal support three and corresponds to the position of the push pin; The pick plate is fixedly installed at the top of the push block; The metal groove tile is symmetrically installed at both ends of the top of the pick plate about the central axis of the pick plate; The corrosion-resistant sponge is fixedly arranged in the metal groove tile; The top spring is fixedly installed between the bottom of the metal support three and the top of the supporting plate, and the number of the top springs is two, and the two top springs are symmetrically distributed about the central axis of the metal support three.

[0010] As the preferred scheme of the present application, the bottom of the pick plate and the bottom of the sheet metal tile are both provided with draining holes for corrosion-resistant sponge draining, and the draining holes in the pick plate and the bottom of the draining hole are overlapped up and down, the top of the support plate is fixedly installed with two sponge covers, the two sponge covers are symmetrically distributed about the central axis of the support plate, and the two sponge covers are located between the two support cylinders, the sponge cover is located at the top of the corrosion-resistant sponge, and the top of the sponge cover is provided with a plurality of dustproof holes which are equidistantly distributed.

[0011] As the preferred scheme of the present application, the sheet metal support is integrally formed with a sheet metal support four on one side close to the push pin, and the sheet metal support four is provided with a path groove at one end close to the push pin, and the inner wall of the path groove is in sliding connection with the outer wall of the push pin.

[0012] As the preferred scheme of the present application, the bottom of the water conveying pipe is fixedly installed with an irrigation tank body, and the output end of the irrigation tank body is connected with the input end of the nursery irrigation drip pipe through a water pipe.

[0013] Compared with the prior art, the present application has the following advantages: 1. In the present application, when the external temperature is high, the water in the nursery soil volatilizes quickly, and the hot air radiates heat to the graphite heat conducting ring. Since the graphite heat conducting ring is made of graphite material, the heat absorption effect is better, so the absorption of heat in the air can be accelerated, thereby rapidly increasing the temperature. Since the graphite heat conducting ring is fixed on the outer wall of the cylinder sleeve, the graphite heat conducting ring conducts heat to the cylinder sleeve, so that the inside of the cylinder sleeve is heated, causing the gas inside to expand, so that the piston moves along the inner wall of the cylinder sleeve away from the water conveying pipe. At the same time, the piston also drives the plunger to move along the inner wall of the sliding hole, causing the flow rate of the water solution inside the water tank to increase, thereby increasing the irrigation water volume. When the temperature decreases, the water volatilization rate in the nursery soil decreases, and the external temperature decreases, causing the temperature of the graphite heat conducting ring and the cylinder sleeve to decrease, so that the volume of the gas inside the cylinder sleeve decreases, causing the piston to move along the inner wall of the cylinder sleeve towards the water conveying pipe. At the same time, the piston drives the plunger to move along the inner wall of the cylinder sleeve, causing the flow rate of the water solution inside the water tank to decrease, thereby reducing the irrigation water volume for the soil and avoiding the loss of water solution.

[0014] 2. In the present application, when irrigating in rainy days, rainwater passes through the dustproof hole at the top of the sponge cover to filter out dust, then wets the corrosion-resistant sponge at the bottom of the sponge cover. The originally dry corrosion-resistant sponge absorbs rainwater, causing the overall weight of the corrosion-resistant sponge to increase, thus increasing the downward pressure on the metal sheet groove tile and the metal sheet support three, causing the metal sheet support three to move downward and compress the two top springs. At the same time, the downward movement of the metal sheet support three also drives the two push blocks at the bottom of its two ends to move downward together. The two push pins move at the same speed in opposite directions during the downward movement of the push block. Since the push pin slides inside the path groove, it can ensure that the push pin moves more stably. At the same time, the two push pins also drive the two sliding covers to move at the same speed in opposite directions along the outer wall of the two cylinder sleeves towards the water delivery pipe through the two metal sheet supports two, causing the spring to be stretched and accumulate elastic force. After the sliding cover moves towards the water delivery pipe, the space inside the push rod is expanded, causing the internal negative pressure, so the piston moves along the inner wall of the cylinder sleeve towards the water delivery pipe, and drives the plunger to move along the inner wall of the sliding hole towards the center of the water delivery pipe through the connection of the push rod. Finally, the two plunger ends contact each other, completely cutting off the water channel inside. In this way, the water solution inside the water storage tank is interrupted to irrigate the nursery, realizing the reasonable use of the water solution inside the water storage tank and avoiding waste of the water solution. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a structural schematic diagram of the present application; Figure 2 is a cross-sectional structural schematic diagram of the irrigation unit in the present application; Figure 3 is a side cross-sectional structural schematic diagram of the water delivery pipe and the cylinder sleeve in the present application; Figure 4 is an enlarged structural schematic diagram of A part in the present application Figure 3 ; Figure 5 is a bottom structural schematic diagram of the cut-off unit in the present application; Figure 6 is an enlarged structural schematic diagram of B part in the present application Figure 5 ; Figure 7 is a structural schematic diagram of the sponge cover in the present application; Figure 8 is an enlarged structural schematic diagram of C part in the present application Figure 7 ; Figure 9 is a structural schematic diagram of the guide groove in the present application.

[0016] In the diagram: 100, support platform; 200, irrigation unit; 201, support cylinder; 2001, guide groove; 202, water storage tank; 203, water pipe; 204, waterway; 205, sliding hole; 206, plunger; 207, push rod; 208, cylinder liner; 209, piston; 2010, sliding cover; 2011, spring; 2012, constant pressure hole; 2013, sheet metal bracket one; 2014, support plate; 20 15. Dust cover; 2016. Graphite heat-conducting ring; 300. Flow interception unit; 301. Sheet metal bracket two; 302. Sales pitch; 303. Sheet metal bracket three; 304. Push block; 305. Cantilever plate; 306. Sheet metal channel tile; 307. Corrosion-resistant sponge; 308. Top spring; 309. Drain hole; 3011. Sponge cover; 3012. Sheet metal bracket four; 3013. Path groove; 400. Irrigation tank. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Please see Figures 1-9 The technical solution provided by the present invention specifically includes the following embodiments: An irrigation device for agricultural seedlings includes a support platform 100 and an irrigation unit 200. The irrigation unit 200 is fixedly mounted on the top of the support platform 100. The irrigation unit 200 includes a support cylinder 201, a water storage tank 202, a water delivery pipe 203, a water channel 204, a sliding hole 205, a plunger 206, a push rod 207, a cylinder liner 208, a piston 209, and a sliding cover 2010. The support cylinder 201 is fixedly mounted at both ends of the top of the support platform 100. A guide groove 2001 is provided on the side wall of the support cylinder 201. The water storage tank 202 is fixedly mounted on the top of the support cylinder 201. The water delivery pipe 203 is fixedly mounted on the bottom of the water storage tank 202. A water channel 204 is provided running vertically through the inside of the water delivery pipe 203. The water delivery pipe 203 passes through the inside of the support cylinder 201. The diameter of the water channel 204 is the same as the diameter of the sliding hole 205. An irrigation tank 400 is fixedly installed at the bottom of the water supply pipe 203. The output end of the irrigation tank 400 is connected to the input end of the nursery irrigation drip pipe through a water pipe. A sliding hole 205 is opened through the upper part of the outer wall of the water supply pipe 203 and is connected to the inside of the water channel 204. A plunger 206 is symmetrically slidably installed inside the sliding hole 205 about the center of the water supply pipe 203. A sealing ring is provided between the plunger 206 and the sliding hole 205. A push rod 207 is fixedly installed at the end of the plunger 206 away from the water supply pipe 203. A cylinder liner 208 is fixedly installed inside the support cylinder 201 and is concentric with the push rod 207. A piston 209 is fixedly installed at the end of the outer wall of the push rod 207 away from the plunger 206, and its outer wall is slidably installed with the inner wall of the cylinder liner 208. A sliding cover 2010 is installed on the outer wall of the cylinder liner 208 near the water supply pipe 203.

[0019] Specifically, the irrigation device is placed in a suitable location in the agricultural seedling nursery, the irrigation drip is inserted into the soil near the roots of the seedlings in the nursery, and the output end of the irrigation tank 400 is connected to the input end of the irrigation drip through a water pipe. Then, sufficient aqueous solution is added into the water storage tank 202. When the outside temperature is high, the moisture in the nursery soil evaporates quickly, and the hot air radiates heat to the graphite heat-conducting ring 2016. Because the graphite heat-conducting ring 2016 is made of graphite, it has better heat absorption, thus accelerating the absorption of heat from the air and causing rapid temperature rise. Since the graphite heat-conducting ring 2016 is fixed to the outer wall of the cylinder liner 208, it conducts heat to the cylinder liner 208, causing the internal temperature of the cylinder liner 208 to rise. This leads to the expansion of the internal gas, causing the piston 209 to move along the inner wall of the cylinder liner 208 away from the water pipe 203. Simultaneously, the piston 209 also drives the plunger 206 along the inner wall of the sliding hole 205 via the push rod 207. The movement of the piston 209 causes the water solution inside the water tank 202 to flow faster through the water channel 204, increasing the irrigation water volume. As the temperature decreases, the evaporation rate of water in the nursery soil slows down. The decrease in external temperature causes the temperature of the graphite heat-conducting ring 2016 and the cylinder liner 208 to drop. As a result, the gas volume inside the cylinder liner 208 contracts, causing the piston 209 to move along the inside of the cylinder liner 208 towards the water supply pipe 203. At the same time, the piston 209 drives the plunger 206 to move along the inner wall of the pick plate 305 via the push rod 207. This causes the water solution inside the water tank 202 to flow slower through the water channel 204, thereby reducing the amount of irrigation water to the soil and preventing water solution loss.

[0020] For further details, please refer to [link / reference]. Figure 4 As shown: The irrigation unit 200 also includes a spring 2011, which is located inside the sliding cover 2010 and fixedly installed between the end of the cylinder liner 208 and the inner end face of the sliding cover 2010. The push rod 207 moves through the side of the sliding cover 2010, and a sealing ring is provided on the inner wall of the through hole of the sliding cover 2010. The spring 2011 connects the sliding cover 2010 and the cylinder liner 208, achieving initial limiting of the sliding cover 2010. After the gas inside the cylinder liner 208 expands due to heat, the elastic force of the spring 2011 ensures that the sliding cover 2010 will not be pushed to move along the outer wall of the cylinder liner 208. The sealing ring is used for airtightness between the sliding cover 2010 and the push rod 207 to prevent air leakage and pressure loss between the sliding cover 2010 and the push rod 207.

[0021] For further details, please refer to [link / reference]. Figure 4 As shown: The cylinder liner 208, at the end furthest from the sliding cover 2010, has multiple equidistant constant pressure holes 2012. A sheet metal bracket 2013 is fixedly installed at the bottom of the water tank 202. The cylinder liner 208 passes through the sheet metal bracket 2013 and is fixedly installed to the sheet metal bracket 2013 with bolts. The constant pressure holes 2012 at the end of the cylinder liner 208 are provided to balance the air pressure between the end of the piston 209 furthest from the push rod 207 and the outside, so that the piston 209 can move smoothly inside the cylinder liner 208. The sheet metal bracket 2013 provides a fixing effect for the cylinder liner 208 to ensure the stability of the cylinder liner 208 during use.

[0022] For further details, please refer to [link / reference]. Figure 2 As shown: A support plate 2014 is fixedly installed at the bottom of the support cylinder 201. The support plate 2014 is fixedly installed to the top of the support platform 100 by bolts. Graphite heat-conducting rings 2016 are fitted on the outer wall of the cylinder liner 208, and the graphite heat-conducting rings 2016 are located around the water storage tank 202. By setting the support plate 2014 to connect with the support platform 100, a stable support effect is provided for the support cylinder 201 and the water storage tank 202, thereby ensuring the overall stability of the support cylinder 201 and the water storage tank 202.

[0023] For further details, please refer to [link / reference]. Figure 2 As shown: A dust cover 2015 is detachably installed on the top of the water tank 202 via multiple equally angled fasteners. The dust cover 2015 is used to seal the top of the water tank 202. After the water tank 202 is filled with aqueous solution, the dust cover 2015 is fixed to the top of the water tank 202 by multiple fasteners on the outside of the water tank 202. This is used to prevent dust or other foreign objects from entering the water tank 202, thereby ensuring the cleanliness of the inside of the water tank 202.

[0024] For further details, please refer to [link / reference]. Figures 2-8 As shown: The flow-stopping unit 300 includes a second sheet metal bracket 301, a pusher 302, a third sheet metal bracket 303, a push block 304, a cantilever plate 305, a sheet metal channel plate 306, a corrosion-resistant sponge 307, and a top spring 308. The second sheet metal bracket 301 is fixedly installed on the side of the sliding cover 2010 away from the constant pressure hole 2012 and slides around the push rod 207. The pusher 302 is fixedly installed on the end of the second sheet metal bracket 301 away from the cylinder liner 208. The third sheet metal bracket 303 is slidably disposed inside the guide groove 2001. The push block 304 is fixedly installed at both ends of the bottom of the third sheet metal bracket 303, corresponding to the position of the pusher 302. The cantilever plate 305 is fixedly installed on top of the push block 304. The sheet metal channel plate 306 is symmetrically installed at both ends of the top of the cantilever plate 305 about its central axis. The corrosion-resistant sponge 307 is fixedly disposed on the sheet metal channel plate 306. Inside 6, two top springs 308 are fixedly installed between the bottom of sheet metal bracket 303 and the top of support plate 2014. The two top springs 308 are symmetrically distributed about the central axis of sheet metal bracket 303. Sheet metal bracket 4 3012 is integrally formed on the side of sheet metal bracket 1 2013 near pusher 302. A path groove 3013 is opened at the end of sheet metal bracket 4 3012 near pusher 302. The inner wall of the path groove 3013 is slidably connected to the outer wall of pusher 302. Two sponge covers 3011 are fixedly installed on the top of support plate 2014. The two sponge covers 3011 are symmetrically distributed about the central axis of support plate 2014 and are located between two support cylinders 201, on top of corrosion-resistant sponge 307. Multiple dustproof holes are opened through the top of sponge covers 3011 at equal intervals.

[0025] Specifically, during rainy irrigation, rainwater filters out dust through the dustproof holes at the top of the sponge cover 3011, wetting the corrosion-resistant sponge 307 located at the bottom of the sponge cover 3011. The originally dry corrosion-resistant sponge 307 absorbs rainwater, increasing its overall weight and thus increasing the downward pressure on the sheet metal channel tile 306 and sheet metal bracket 303. This causes the sheet metal bracket 303 to move downward, compressing the two top springs 308. Simultaneously, the downward movement of the sheet metal bracket 303 also drives the two push blocks 304 located at its bottom ends to move downward together. During the downward movement of the push blocks 304, they push the two pushers 302 to move in opposite directions at the same speed. Since the pushers 302 slide inside the path groove 3013, the movement of the pushers 302 is more stable. At the same time, the two pushers 302 are also connected by the two sheet metal brackets. The two sliding covers 2010 move at a constant speed along the outer walls of the two cylinder liners 208 towards the water pipe 203, causing the spring 2011 to be stretched and store elastic force. After the sliding covers 2010 move towards the water pipe 203, the space inside the push rod 207 is expanded, resulting in negative pressure inside. Therefore, the piston 209 moves along the inner wall of the cylinder liner 208 towards the water pipe 203, and through the connection of the push rod 207, it drives the plunger 206 to move along the inner wall of the sliding hole 205 towards the center of the water pipe 203. Finally, the ends of the two plungers 206 contact each other, completely cutting off the water channel 204. In this way, the aqueous solution inside the water tank 202 is interrupted from irrigating the nursery, and the nursery is directly irrigated by rainwater, realizing the rational use of the aqueous solution inside the water tank 202 and avoiding waste of aqueous solution.

[0026] For further details, please refer to [link / reference]. Figure 5 As shown: Both the bottom of the cantilever plate 305 and the bottom of the sheet metal channel 306 have through-holes 309 for draining water from the corrosion-resistant sponge 307. The positions of the through-holes 309 on the bottom of the cantilever plate 305 and the bottom of the through-holes 309 overlap vertically. By providing through-holes 309 in the bottom of the cantilever plate 305 and the sheet metal channel 306, the corrosion-resistant sponge 307 is facilitated to drain water after being wet, thus aiding in the dehydration and drying of the corrosion-resistant sponge 307 after the weather clears up.

[0027] The specific operation of this agricultural seedling irrigation device is as follows: Installation process: Place the irrigation device in a suitable location in the agricultural seedling nursery, insert the irrigation drip into the soil near the roots of the seedlings in the nursery, and connect the output end of the irrigation tank 400 to the input end of the irrigation drip through a water pipe. Then, add enough aqueous solution to the inside of the water storage tank 202. After the water storage tank 202 is filled with aqueous solution, fix the dust cover 2015 to the top of the water storage tank 202 with multiple fasteners on the outside of the water storage tank 202 to prevent dust or other foreign objects from entering the inside of the water storage tank 202. Irrigation process: Irrigation is divided into two usage scenarios: sunny days and rainy days; During irrigation on sunny days, when the outside temperature is high, the water in the nursery soil evaporates quickly. The hot air radiates heat to the graphite heat-conducting ring 2016. Because the graphite heat-conducting ring 2016 is made of graphite, it has better heat absorption, thus accelerating the absorption of heat from the air and causing a rapid temperature rise. Since the graphite heat-conducting ring 2016 is fixed to the outer wall of the cylinder liner 208, it conducts heat to the cylinder liner 208, causing the internal temperature to rise. This leads to the expansion of the internal gas, causing the piston 209 to move along the inner wall of the cylinder liner 208 away from the water pipe 203. Simultaneously, the piston 209, through the push rod 207, drives the plunger 206 along the sliding hole 205. The movement of the inner wall increases the flow rate of the aqueous solution inside the water tank 202 through the water channel 204, thereby increasing the irrigation water volume. When the temperature drops, the evaporation rate of water in the nursery soil decreases, and the temperature of the graphite heat-conducting ring 2016 and cylinder liner 208 decreases. As a result, the gas volume inside the cylinder liner 208 contracts, causing the piston 209 to move along the inside of the cylinder liner 208 towards the water supply pipe 203. At the same time, the piston 209 drives the plunger 206 to move along the inner wall of the pick plate 305 through the push rod 207, which reduces the flow rate of the aqueous solution inside the water tank 202 through the water channel 204, thereby reducing the irrigation water volume to the soil and preventing the aqueous solution from being lost. During rainy irrigation: Rainwater filters out dust through the dustproof holes at the top of the sponge cover 3011, wetting the corrosion-resistant sponge 307 located at the bottom of the sponge cover 3011. The originally dry corrosion-resistant sponge 307 absorbs rainwater, increasing its overall weight. This increases the downward pressure on the sheet metal channel tile 306 and sheet metal bracket 303, causing the sheet metal bracket 303 to move downward, compressing the two top springs 308. Simultaneously, the downward movement of the sheet metal bracket 303 also drives the two push blocks 304 located at its bottom ends to move downward together. During the downward movement of the push blocks 304, they push the two pushers 302 to move in opposite directions at the same speed. Since the pushers 302 slide inside the path groove 3013, the movement of the pushers 302 is more stable. At the same time, the two pushers 302 are also connected by the two sheet metal brackets 302. 01 drives the two sliding covers 2010 to move at the same speed in opposite directions along the outer walls of the two cylinder liners 208 toward the water supply pipe 203, causing the spring 2011 to be stretched and store elastic force. After the sliding covers 2010 move toward the water supply pipe 203, the space inside the push rod 207 is expanded, resulting in negative pressure inside. Therefore, the piston 209 moves along the inner wall of the cylinder liner 208 toward the water supply pipe 203, and through the connection of the push rod 207, drives the plunger 206 to move along the inner wall of the sliding hole 205 toward the center of the water supply pipe 203. Finally, the ends of the two plungers 206 contact each other, completely cutting off the water channel 204. In this way, the aqueous solution inside the water storage tank 202 is interrupted from irrigating the nursery, and the nursery is directly irrigated by rainwater, realizing the rational use of the aqueous solution inside the water storage tank 202 and avoiding waste of aqueous solution.

[0028] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention.

Claims

1. An irrigation device for agricultural seedlings, characterized in that: include: A support platform (100) and an irrigation unit (200), wherein the irrigation unit (200) is fixedly mounted on the top of the support platform (100); The irrigation unit (200) includes: A support cylinder (201) is fixedly installed at both ends of the top of the support platform (100), and a guide groove (2001) is provided on the side wall of the support cylinder (201). A water storage tank (202) is fixedly installed on the top of the support cylinder (201); A water supply pipe (203) is fixedly installed at the bottom of the water storage tank (202), and a water channel (204) is opened through the inside of the water supply pipe (203) from top to bottom. A sliding hole (205) is opened through the upper part of the outer wall of the water pipe (203) and is connected to the inside of the waterway (204); The plunger (206) is symmetrically slidably installed inside the sliding hole (205) about the center of the water pipe (203); The push rod (207) is fixedly installed at the end of the plunger (206) away from the water pipe (203); The cylinder liner (208) is fixedly installed inside the support cylinder (201) and is concentric with the push rod (207); The piston (209) is fixedly installed on the outer wall of the push rod (207) at the end away from the plunger (206), and its outer wall is slidably installed with the inner wall of the cylinder liner (208); The sliding cover (2010) is installed on the outer wall of the cylinder liner (208) near the water pipe (203).

2. The irrigation device for agricultural seedlings according to claim 1, characterized in that: The water pipe (203) penetrates the interior of the support cylinder (201), the diameter of the water channel (204) is the same as the diameter of the sliding hole (205), and a sealing ring is provided between the plunger (206) and the sliding hole (205).

3. The irrigation device for agricultural seedlings according to claim 2, characterized in that: The irrigation unit (200) also includes: The spring (2011) is located inside the slide cover (2010) and is fixedly installed between the end of the cylinder liner (208) and the inner end face of the slide cover (2010). The push rod (207) moves through the side of the slide cover (2010), and a sealing ring is provided on the inner wall of the through hole of the slide cover (2010). The sealing ring is used for airtightness between the slide cover (2010) and the push rod (207).

4. The irrigation device for agricultural seedlings according to claim 3, characterized in that: The cylinder liner (208) has multiple equidistant constant pressure holes (2012) through one end away from the sliding cover (2010). A sheet metal bracket (2013) is fixedly installed at the bottom of the water tank (202). The cylinder liner (208) passes through the inside of the sheet metal bracket (2013) and is fixedly installed to the sheet metal bracket (2013) by bolts.

5. The irrigation device for agricultural seedlings according to claim 4, characterized in that: A support plate (2014) is fixedly installed at the bottom of the support cylinder (201). The support plate (2014) is fixedly installed to the top of the support platform (100) by bolts. Graphite heat-conducting rings (2016) are fitted on the outer wall of the cylinder liner (208). The graphite heat-conducting rings (2016) are located around the water storage tank (202).

6. The irrigation device for agricultural seedlings according to claim 5, characterized in that: The top of the water storage tank (202) is detachably fitted with a dust cover (2015) by a plurality of fasteners distributed at equal angles. The dust cover (2015) is used to seal the top of the water storage tank (202).

7. The irrigation device for agricultural seedlings according to claim 6, characterized in that: The interception unit (300) includes: Sheet metal bracket 2 (301) is fixedly installed on the side of the sliding cover (2010) away from the constant pressure hole (2012), and slides around the push rod (207); The promotion (302) is fixedly installed on the end of the sheet metal bracket (301) away from the cylinder liner (208); Sheet metal bracket three (303) is slidably disposed inside the guide groove (2001); The push block (304) is fixedly installed at both ends of the bottom of the sheet metal bracket three (303) and corresponds to the position of the push block (302); The cantilever plate (305) is fixedly installed on the top of the push block (304); Sheet metal channel tile (306) is symmetrically installed at both ends of its top about the central axis of cantilever plate (305); Corrosion-resistant sponge (307) is fixedly installed inside the sheet metal channel tile (306); Top springs (308) are fixedly installed between the bottom of sheet metal bracket three (303) and the top of support plate (2014), and there are two top springs (308) symmetrically distributed about the central axis of sheet metal bracket three (303).

8. The irrigation device for agricultural seedlings according to claim 7, characterized in that: The bottom of the cantilever plate (305) and the bottom of the sheet metal channel tile (306) are both provided with drainage holes (309). The drainage holes (309) are used for the corrosion-resistant sponge (307) to drain water. The drainage holes (309) at the bottom of the cantilever plate (305) and the drainage holes (309) are vertically overlapping. Two sponge covers (3011) are fixedly installed on the top of the support plate (2014). The two sponge covers (3011) are symmetrically distributed about the central axis of the support plate (2014). The two sponge covers (3011) are located between the two support cylinders (201). The sponge covers (3011) are located on the top of the corrosion-resistant sponge (307). The top of the sponge covers (3011) is provided with multiple dustproof holes that are evenly distributed.

9. The irrigation device for agricultural seedlings according to claim 8, characterized in that: The sheet metal bracket one (2013) has a sheet metal bracket four (3012) integrally formed on one side near the pusher (302). The sheet metal bracket four (3012) has a path groove (3013) at one end near the pusher (302). The inner wall of the path groove (3013) is slidably connected to the outer wall of the pusher (302).

10. An agricultural seedling irrigation device according to claim 9, characterized in that: An irrigation tank (400) is fixedly installed at the bottom of the water supply pipe (203), and the output end of the irrigation tank (400) is connected to the input end of the nursery irrigation drip pipe through a water pipe.

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