CN110344486A - Drainage arrangement is used in a kind of experiment of Coastal beach reclamation area field farmland - Google Patents

Abstract

The invention discloses a drainage device for field farmland experiments in coastal beach reclamation areas, relates to the technical field of agricultural production, and comprises a water absorption component, a drainage component and a water treatment component, and the water absorption component is used for pumping water from a water source into water treatment Cleaning treatment is carried out in the component, the water treatment component includes a primary filter component and a sand cleaning component, and the drainage component is used to discharge the treated water to the farmland, a kind of drainage system for field farmland experiments in coastal tidal flat reclamation areas according to the present invention The device can effectively treat the saline-alkali components contained in the water source when the overall device drains water in coastal tidal flat reclamation areas, effectively improve the production of crops, improve the practicability of the overall device, and bring better use prospects.

Description

A drainage device for field farmland experiments in coastal tidal flat reclamation areas

technical field

The invention relates to the technical field of agricultural production, in particular to a drainage device for field farmland experiments in coastal tidal flat reclamation areas.

Background technique

Farmland drainage refers to the artificial measures to remove excessive surface water, soil water and groundwater in the farmland, improve the relationship between water, fertilizer, air and heat in the soil, and facilitate the growth of crops. However, my country has a long coastline and a large proportion of plain coasts. However, coastal tidal flat soil contains more saline-alkali components, and its poor physical and chemical properties cause the growth of most plants to be inhibited to varying degrees, or even unable to survive.

There are certain disadvantages in the use of existing farmland drainage devices. When the existing farmland drainage devices drain the coastal tidal flat reclamation area, they may discharge the saline-alkali components in the coastal tidal flat soil into the paddy fields, which may cause plants to become unhealthy. It can be effectively produced, but the maximum output value cannot be obtained, so it is inconvenient, and it has brought a certain impact in the process of use. Therefore, those skilled in the art provide a drainage device for field farmland experiments in coastal tidal flat reclamation areas to solve the problems raised in the above-mentioned background technology.

Contents of the invention

The object of the present invention is to provide a drainage device for field farmland experiments in the beach reclamation area, so as to solve the problems raised in the above-mentioned background technology.

In order to achieve the above object, the present invention provides the following technical solutions: a drainage device for field farmland experiments in the coastal tidal flat reclamation area, which includes a water absorption component, a drainage component and a water treatment component, and the water absorption component is used to pump water from the water source into the The cleaning process is carried out in the water treatment assembly, the water treatment assembly includes a primary filter assembly and a sand cleaning assembly, and the drainage assembly is used to discharge the treated water to the farmland.

Further, preferably, the water absorbing assembly is arranged on a support frame, universal wheels are fixedly installed at the four corners of the bottom end of the support frame, the water absorbing assembly includes a water suction pipe, and the top side of the support frame A plurality of groups of water suction pipes are fixedly installed, and a first water pump is fixedly installed on one side of the water suction pipes, and a fixing frame is fixedly installed on the side near the top of the support frame to the water suction pipes, and a side of the inner wall of the fixing frame is fixedly installed There is a water treatment assembly, and the water treatment assembly communicates with the suction pipe through a connecting pipe.

Further, preferably, the water treatment assembly includes a filter box, the filter box is fixed in a fixed frame, a drainage assembly is fixedly installed on one side of the outer surface of the filter box, and the connecting pipe extends into the filter box, so that The top of the filter box is also provided with a feeding port.

Further, preferably, the water treatment assembly includes a primary filter assembly and a sand removal assembly, both of which are arranged in a filter box, the primary filter assembly includes an overflow plate, and the overflow plate Set inside the filter box on the side close to the connecting pipe, the overflow plate includes a left interceptor plate and a right interceptor plate, the left interceptor plate is fixed on the top of the filter box, and the bottom of the left interceptor plate is not in contact with the bottom of the filter box , the right intercepting plate connects the bottom and the top of the filter box, and the right intercepting plate separates the filter box into two parts, leaving a gap between the left intercepting plate and the right intercepting plate for placing filter stones, and the filter stone is composed of Wrapped in gauze, the right intercepting plate also has a through hole, which is used to introduce the water source flowing through the primary filter assembly into the sand cleaning assembly.

Further, as a preference, the sand cleaning assembly includes a motor, a hoist and a filter bucket, the motor is fixed on the bottom of the filter box, and the output end of the motor extends into the inside of the filter box, and the output end of the motor is connected to the bottom of the filter bucket. Fixedly connected, the hoist is fixed on the top of the filter box, and a stay rope is wound on the hoist, one end of the stay rope extends into the inside of the filter box and is fixedly connected with a limit seat, and the limit seat is slidably arranged on the limit rod , the limit rod is fixed on the filter box, and the limit rod is coaxially arranged with the filter bucket, and 1-3 elastic cleaning devices are fixed on the limit seat, and the elastic cleaning device is used to Clean the sand from the filter bucket.

Further, as a preference, an elastic cleaning device is fixedly arranged on the limit seat, the elastic cleaning device includes a support, the support is [-shaped, and one end of the support is connected to the limit seat through a connecting rod. Fixedly connected, the other end of the support is fixedly provided with a chute, and a slide bar is slidably provided in the chute, the slide bar passes through the support and the slide bar is slidably connected with the support, and the slide bar It is T-shaped, and its outer surface is covered with a spring one. The slide bar is also fixedly connected with a hinged seat, and the hinged seat is symmetrically provided with an angle-adjustable cleaning device. The cleaning device includes a cleaning head. The head is fixed on the sand cleaning seat, and the sand cleaning seat is fixed on the hinged plate, one end of the hinged plate is hinged with the hinged seat, and the other end of the hinged plate is hinged with an adjusting rod, and the adjusting rod is T-shaped , and the adjustment rod is slidably arranged in the adjustment seat, the other end of the adjustment seat is hinged to the hinge seat, a spring 2 is arranged in the adjustment seat, and a waterproof layer is sheathed on the outer surface of the adjustment rod.

Further, as a preference, a broom is fixedly arranged at the bottom end of the limit rod, and the broom is cylindrical, which is in contact with the bottom of the filter bucket, and a sand discharge port is provided under the filter bucket, and the filter box An annular groove is arranged below, a sand discharge outlet is arranged on the annular groove, and a plug is arranged on the sand discharge outlet.

Further, preferably, the drainage assembly includes a water outlet pipe, the water outlet pipe communicates with the inside and outside of the filter box, and a second water pump is fixedly installed on one side of the outer surface of the water outlet pipe, corresponding to one side of the water outlet pipe inside the filter box. A hose is fixedly installed on the side, and the top of the filter box is a double-layer structure. The hose passes through the top of the filter box and enters the filter box, and a filter cover is also fixedly installed at the end of the hose.

Further, as a preference, a threaded connecting rod is fixedly installed on the top end of the filter cover corresponding to the hose, and a thread groove is etched on the side of the inside of the hose corresponding to the threaded connecting rod, and the filter cover passes through the threaded connecting rod. Threaded connection with hose.

Further, preferably, a controller is fixedly installed on one side of the outer surface of the filter box, and the first water pump, the second water pump, the motor and the hoist are all electrically connected to the controller, and the support frame, the fixed frame and the filter box The outer walls are all coated with a rust-removing layer.

Compared with prior art, the beneficial effect of the present invention is:

1. This device is equipped with a multi-layer filter device, which is to filter through the overflow plate, filter bucket and filter cover respectively, so as to ensure the cleanliness of the water source. The overflow plate can make the water flow in from the bottom of the overflow plate. Then flow upwards, while the large impurities in the water are not easy to flow upwards with the water, and the impurities in the water can be further filtered by setting a filter stone, and the user can pour the neutralizer into the filter box through the feed port, so that Neutralize the salinity and alkali components in the water source to facilitate better plant growth and improve agricultural productivity;

2. The filter barrel set in this device is driven by a motor to rotate, so that the water in the filter barrel can be quickly thrown out to achieve rapid filtration. The sand and stone impurities attached to the inner wall of the filter barrel are cleaned by an elastic cleaning device. The head can contact the inner wall of the filter barrel at different angles, and the angle can be automatically adjusted by the second spring to ensure that the cleaning head is in contact with the inner wall of the filter barrel, and the elastic cleaning device can be driven by the hoist to slide up and down along the limit rod for comprehensive cleaning Filter barrel, improve cleaning efficiency;

3. Through the set filter cover, the outlet pipe will not be blocked during the drainage process, that is, the filter cover can effectively block impurities at the outer end of the hose, which is convenient for the user to drain effectively and continuously when draining. When the user needs to replace the filter cover, the filter cover can be easily unscrewed or installed through the threaded connection between the threaded connecting rod and the thread groove, which is convenient for the user to use, which is better than the traditional method.

Description of drawings

Fig. 1 is a structural schematic diagram of a drainage device for a field farmland experiment in a coastal tidal flat reclamation area;

Fig. 2 is a structural schematic diagram of a filter box in a drainage device for field farmland experiments in coastal tidal flat reclamation areas;

Fig. 3 is a structural schematic diagram of an elastic cleaning device for farmland in coastal tidal flat reclamation area;

Fig. 4 is a schematic diagram of the connection structure between the hose and the filter cover in the drainage device for the field farmland experiment in the coastal tidal flat reclamation area;

In the figure: 1. Support frame; 2. Universal wheel; 3. Suction pipe; 4. First water pump; 5. Fixed frame; 6. Filter box; 7. Connecting pipe; 8. Controller; 9. Outlet pipe; 10. Second water pump; 11. Feed inlet; 12. Overflow plate; 13. Pull rope; 14. Filter bucket; 15. Flexible hose; 16. Filter cover; 17. Threaded connecting rod; 18. Thread groove; 19 , filter stone; 20, motor; 21, broom; 22, hoist; 23, limit rod; 24, limit seat; 25, support; 26, connecting rod; 27, slide bar; 28, spring one; 29, Adjusting seat; 30, sand clearing seat; 31, spring two; 32, hinged seat; 33, adjusting rod; 34, hinged plate; 35, annular groove.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Please refer to Figures 1 to 4. In an embodiment of the present invention, a drainage device for field farmland experiments in coastal tidal flat reclamation areas includes a water absorption component, a drainage component and a water treatment component, and the water absorption component is used to pump water from the water source into to the water treatment assembly for cleaning treatment, the water treatment assembly includes a primary filter assembly and a sand cleaning assembly, and the drainage assembly is used to discharge the treated water to the farmland.

Wherein, the water-absorbing assembly is arranged on a support frame 1, universal wheels 2 are fixedly installed at the four corners of the bottom end of the support frame 1, the water-absorbing assembly includes a suction pipe 3, and the top of the support frame 1 There are multiple groups of suction pipes 3 fixedly installed on one side, the first water pump 4 (model: CDL(F)2-40) is fixedly installed on one side of the suction pipes 3, and the top of the support frame 1 is close to the suction pipe 3 A fixed frame 5 is fixedly installed on one side of the fixed frame 5 , and a water treatment assembly is fixedly installed on one side of the inner wall of the fixed frame 5 , and the water treatment assembly and the suction pipe 3 are also communicated through a connecting pipe 7 .

In this embodiment, the water treatment assembly includes a filter box 6, the filter box 6 is fixed in the fixing frame 5, a drainage assembly is fixedly installed on one side of the outer surface of the filter box 6, and the connecting pipe 7 extends into In the filter box 6, the top of the filter box 6 is also provided with a feed port 11, so that the overall device can be filled with a neutralizing agent through the feed port 11, which is convenient for the user to neutralize the salinity of the water source, and more Facilitate plant growth.

Wherein, the water treatment assembly includes a primary filter assembly and a sand removal assembly, the primary filter assembly and the sand removal assembly are all arranged in the filter box 6, the primary filter assembly includes an overflow plate 12, and the overflow plate 12 Set in the inside of the filter box 6 near the side of the connecting pipe 7, the overflow plate 12 includes a left interception plate and a right interception plate, the left interception plate is fixed on the top of the filter box 6, and the bottom of the left interception plate is not connected with the filter The bottom of the box 6 is in contact, the right intercepting plate connects the bottom and the top of the filter box 6, and the right intercepting plate separates the filtering box 6 into two parts, leaving a gap between the left intercepting plate and the right intercepting plate for placing the filter The filter stone is wrapped by gauze, which is convenient for taking out or placing the filter stone as a whole. By setting the overflow plate 12, the water can flow in from the bottom of the overflow plate, and then flow upward, while the large impurities in the water are not easy to move upward. It flows with the water, and the impurities in the water can be further filtered by setting a filter stone.

There is also a through hole on the right intercepting plate, which is used to introduce the water source flowing through the primary filter assembly into the sand cleaning assembly.

In this embodiment, the sand removal assembly includes a motor 20, a winch 22 and a filter barrel 14, the motor 20 is fixed on the bottom of the filter box 6, and the output end of the motor 20 extends into the inside of the filter box 6, the motor 20 The output end of the filter barrel is fixedly connected with the bottom of the filter barrel 14, and the filter barrel 14 can be driven to rotate by starting the motor 20, while the water in the filter barrel can be quickly thrown out to realize rapid filtration. The upper end of the filter barrel 14 is designed with an opening, and the sides are A plurality of through holes are used to pass water, and a filter screen is pasted on the inner wall of the filter barrel to block sand and gravel impurities, and the sand and gravel impurities attached to the inner wall of the filter barrel are cleaned by an elastic cleaning device.

In order to clean up the inner wall of the filter barrel more comprehensively, a winch 22 is arranged in the device, and the winch 22 is fixed on the top of the filter box 6, and a stay rope 13 is wound on the winch 22, and one end of the stay rope 13 stretches into the filter box 6 and is fixedly connected to the limit seat 24, the limit seat 24 is slidably arranged on the limit rod 23, the limit rod 23 is fixed on the filter box 6, and the limit rod 23 is connected with the filter barrel 14 Coaxially arranged, the limit rod 23 can be square, to prevent the limit seat 24 from rotating arbitrarily, and 1-3 elastic cleaning devices are fixedly arranged on the limit seat 24, and the elastic cleaning device is used to clean the filter barrel 14 grains of sand.

In this embodiment, an elastic cleaning device is fixedly arranged on the limit seat 24, and the elastic cleaning device includes a support 25, the support 25 is [-shaped, and one end of the support 25 passes through a connecting rod 26 is fixedly connected with the limit seat 24, and the other end of the support 25 is fixedly provided with a chute 35, and a slide bar 27 is slidably provided in the chute 35, and the slide bar 27 passes through the support 25 and the Slide bar 27 is slidably connected with support 25, and described slide bar 27 is T-shaped, and its outer surface is sheathed with spring 28, and described slide bar 27 is also fixedly connected with hinged seat 32, and symmetrical arrangement on described hinged seat 32 Angle-adjustable cleaning device is arranged, and described cleaning device comprises cleaning head, and described cleaning head is fixed on the sand cleaning seat 30, and described sand cleaning seat 30 is fixed on the hinged plate 34, and one end of described hinged plate 34 is hinged with The seat 32 is hinged, and the other end of the hinge plate 34 is hinged with an adjustment rod 33, which is T-shaped, and the adjustment rod 33 is slidably arranged in the adjustment seat 29, and the other end of the adjustment seat 29 Hinged with the hinge seat 32, the adjustment seat 29 is provided with a spring 2 31, and the outer surface of the adjustment rod 33 is also provided with a waterproof layer, and the two cleaning heads can contact the inner wall of the filter barrel at different angles. It can be automatically adjusted in real time through the spring two to ensure that the cleaning head is in contact with the inner wall of the filter barrel and improve cleaning efficiency.

In addition, a broom 21 is fixedly arranged at the bottom end of the limit rod 23, the broom 21 is cylindrical, and it is in contact with the bottom of the filter bucket 14, and a sand discharge port is arranged below the filter bucket 14, the The bottom of filter box 6 is provided with annular groove 35, and annular groove 35 is corresponding to the movement locus of the sand discharge port on filter bucket 14, and described annular groove 35 is provided with sand discharge port, and described sand discharge port is provided with There is a plug to discharge excess sand and other impurities after the drainage is completed.

In this embodiment, the drainage assembly includes a water outlet pipe 9, the water outlet pipe 9 communicates with the inside and outside of the filter box 6, and a second water pump 10 is fixedly installed on one side of the outer surface of the water outlet pipe 9. A hose 15 is fixedly installed on the side corresponding to the outlet pipe 9 inside. The top of the filter box 6 is a double-layer structure. The hose 15 passes through the top of the filter box 6 and enters the filter box 6. The hose 15 The end portion of 15 is also fixedly installed with filter cover 16, can prevent outlet pipe 9 from being blocked.

A threaded connecting rod 17 is fixedly installed on the top of the filter cover 16 corresponding to the side of the hose 15, and a threaded groove 18 is etched on the side of the inside of the flexible tube 15 corresponding to the threaded connecting rod 17, and the filter cover 16 passes through the screw thread. The connecting rod 17 is threadedly connected with the flexible pipe 15, which is convenient for quick replacement.

A controller 8 is fixedly installed on one side of the outer surface of the filter box 6, and the first water pump 4, the second water pump 10, the motor 20 and the hoist 22 are all electrically connected to the controller 8, and the support frame 1 and the fixed frame 5 All be coated with derusting layer with the outer wall of filter box 6, prevent equipment from getting rusty, improve its service life.

In practice, the device is moved to the working position through the universal wheel, the first water pump 4 is controlled by the controller 8 to operate, and the water source is pumped into the filter box 6 provided inside the fixed frame 5 through the suction pipe 3 and the connecting pipe 7 In the process, the impurities in the water source are precipitated through the overflow plate 12 and the filter stone, and the user pours the neutralizing agent into the filter box 6 through the feed port 11, so that the saline-alkali components in the water source can be neutralized, which is convenient for plants to be more Good growth, improve agricultural productivity, and then cooperate with the set filter barrel 14 to perform secondary filtration, so that the discharged water source can be made more pure. In addition, in order to prevent impurities such as sand and stones in the water source from clogging the filter barrel 14, this device is set There is an elastic cleaning device, the filter barrel is driven by a motor 20, and during the rotation of the filter barrel, its inner surface contacts with the cleaning head so that the sand attached to the filter barrel 14 falls, and the elastic cleaning device can be driven by a hoist 22 to move along The limit rod 23 slides up and down so that the filter bucket 14 can be fully cleaned to improve the filtration efficiency. The outer end of the pipe 15 is convenient for the user to discharge the water source from the outlet pipe 9 through the second water pump 10, so that the water can be effectively and continuously drained when the water is drained. When the user needs to replace the filter cover 16, it can be screwed The threaded connection between the rod 17 and the threaded groove 18 makes it easy to unscrew or install the filter cover 16, which is convenient for users to use and is more practical.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications and substitutions can be made to these embodiments without departing from the principle and spirit of the present invention. and modifications, the scope of the invention is defined by the appended claims and their equivalents.

Claims (10)

1. A drainage device for field farmland experiments in coastal tidal flat reclamation areas, characterized in that it includes a water absorption assembly, a drainage assembly and a water treatment assembly, and the water absorption assembly is used to pump water in the water source into the water treatment assembly for cleaning treatment, the water treatment component includes a primary filter component and a sand cleaning component, and the drainage component is used to discharge the treated water to the farmland. 2. A drainage device for field and farmland experiments in coastal tidal flat reclamation area according to claim 1, characterized in that, the water absorbing assembly is arranged on the support frame (1), and the bottom end of the support frame (1) has four Universal wheels (2) are fixedly installed at the corners, the water absorbing assembly includes a water suction pipe (3), and a plurality of groups of water suction pipes (3) are fixedly installed on the top side of the support frame (1). One side of (3) is fixedly installed with the first water pump (4), and the top of the support frame (1) is fixedly installed with a fixed mount (5) near the side of the suction pipe (3), and the fixed mount (5) A water treatment assembly is fixedly installed on one side of the inner wall of the water treatment assembly, and the water treatment assembly communicates with the suction pipe (3) through a connecting pipe (7). 3. A kind of drainage device for field and farmland experiment in coastal tidal flat reclamation area according to claim 2, characterized in that, the water treatment assembly includes a filter box (6), and the filter box (6) is fixed on the fixing frame (5 ), one side of the outer surface of the filter box (6) is fixedly installed with a drainage assembly, the connecting pipe (7) extends into the filter box (6), and the top of the filter box (6) is also provided with Feed port (11). 4. A drainage device for field and farmland experiments in coastal tidal flat reclamation areas according to claim 3, wherein the water treatment assembly includes a primary filter assembly and a sand removal assembly, and the primary filter assembly and the sand removal assembly are both provided with In the filter box (6), the primary filter assembly includes an overflow plate (12), the overflow plate (12) is arranged on the side of the filter box (6) close to the connecting pipe (7), the The overflow plate (12) includes a left intercepting plate and a right intercepting plate, the left intercepting plate is fixed on the top of the filter box (6), and the bottom of the left intercepting plate is not in contact with the bottom of the filter box (6), and the right intercepting plate is connected to the filter The bottom and the top of the box (6), and the filter box (6) is divided into two parts by the right intercepting plate, there is a gap between the left intercepting plate and the right intercepting plate for placing filter stones, and the filter stones are formed by Wrapped in gauze, the right intercepting plate also has a through hole, which is used to introduce the water source flowing through the primary filter assembly into the sand cleaning assembly. 5. A kind of drainage device for field and farmland experiments in coastal tidal flat reclamation area according to claim 4, characterized in that, the sand cleaning assembly includes a motor (20), a winch (22) and a filter bucket (14), and the motor (20) is fixed on the bottom of filter case (6), and the output end of motor (20) stretches into the inside of filter case (6), and the output end of motor (20) is fixedly connected with the bottom of filter barrel (14), The hoist (22) is fixed on the top of the filter box (6), the hoist (22) is wound with a stay rope (13), and one end of the stay rope (13) stretches into the inside of the filter box (6) and is fixedly connected Limit seat (24), described limit seat (24) is slidably arranged on the limit rod (23), and described limit rod (23) is fixed on the filter box (6), and described limit rod ( 23) It is arranged coaxially with the filter barrel (14), and 1-3 elastic cleaning devices are fixedly arranged on the limit seat (24), and the elastic cleaning devices are used to clean the sand grains on the filter barrel (14). 6. The drainage device for field and farmland experiments in coastal tidal flat reclamation area according to claim 5, characterized in that, one elastic cleaning device is fixedly arranged on the limit seat (24), and the elastic cleaning device includes a support seat (25), the support (25) is [shaped, one end of the support (25) is fixedly connected with the limit seat (24) through the connecting rod (26), and the other end of the support (25) One end is fixedly provided with chute (35), and slide bar (27) is slidably arranged in described chute (35), and described slide bar (27) passes bearing (25) and described slide bar (27) and The support (25) is slidingly connected, the slide bar (27) is T-shaped, and its outer surface is covered with a spring one (28), and the slide bar (27) is also fixedly connected with a hinged seat (32). Angle-adjustable cleaning devices are symmetrically arranged on the hinged seat (32), and the cleaning device includes a cleaning head fixed on the sand cleaning seat (30), and the sand cleaning seat (30) is fixed on the hinge plate (34), one end of the hinge plate (34) is hinged with the hinge seat (32), and the other end of the hinge plate (34) is hinged with an adjustment rod (33), and the adjustment rod (33) is T font, and the adjustment rod (33) is slidably arranged in the adjustment seat (29), the other end of the adjustment seat (29) is hinged with the hinge seat (32), and a spring is arranged in the adjustment seat (29). Two (31), the outer surface of the adjusting rod (33) is also sleeved with a waterproof layer. 7. The drainage device for field and farmland experiments in coastal tidal flat reclamation area according to claim 5, characterized in that, a broom (21) is fixedly arranged at the bottom end of the limit rod (23), and the broom (21) It is cylindrical, and it is in contact with the bottom of the filter bucket (14), and a sand outlet is provided below the filter bucket (14), and an annular groove (35) is provided below the filter box (6). A sand discharge port is provided on the annular groove (35), and a plug is provided on the sand discharge port. 8. A kind of drainage device for field and farmland experiments in coastal tidal flat reclamation area according to claim 2, characterized in that, the drainage assembly includes a water outlet pipe (9), and the water outlet pipe (9) communicates with the filter box (6) Inside and outside, a second water pump (10) is fixedly installed on one side of the outer surface of the outlet pipe (9), and a hose (15) is fixedly installed on the side corresponding to the outlet pipe (9) inside the filter box (6) , the top of the filter box (6) is a double-layer structure, the hose (15) passes through the top of the filter box (6) and enters the filter box (6), and the end of the hose (15) Also fixedly installed with filter cover (16). 9. a kind of drainage device for field farmland experiments in coastal reclamation area according to claim 8, is characterized in that, one side of the top corresponding hose (15) of the filter cover (16) is fixedly installed with a threaded connecting rod ( 17), the inner side of the flexible pipe (15) corresponding to the threaded connecting rod (17) is etched with a threaded groove (18), and the filter cover (16) is connected to the flexible pipe (15) through the threaded connecting rod (17) threaded connection. 10. a kind of drainage device for field farmland experiments in coastal reclamation area according to claim 2, is characterized in that, a controller (8) is fixedly installed on one side of the outer surface of the filter box (6), and the first water pump ( 4), the second water pump (10), the motor (20) and the winch (22) are all electrically connected with the controller (8), and the support frame (1), the fixed frame (5) and the filter box (6) The outer walls are all coated with a rust-removing layer.