Hydrophobic structure for water conservancy irrigation and hydrophobic irrigation method

Abstract

The invention discloses a drainage structure for water conservancy irrigation and a drainage irrigation method, and relates to the technical field of water conservancy irrigation, the drainage structure comprises a drainage pipeline, an irrigation canal and a mechanical floating assembly, the drainage pipeline is arranged in a dam body, one end of the drainage pipeline is connected with a water area, and the other end of the drainage pipeline is connected with the irrigation canal; two sealing plates are correspondingly arranged at the opening of the other end of the drainage pipeline, and the sealing plates are rotationally arranged at the opening of the other end of the drainage pipeline; the mechanical floating assembly comprises a connecting strip, a balancing weight and a floating block, a driving part is arranged at the bottom of the connecting strip, and the top of the connecting strip is connected with the balancing weight, the size of the water outlet can be automatically and adaptively adjusted according to the height of the water area liquid level, so that it is guaranteed that the water flow is unchanged, irrigation accuracy is guaranteed, and waste of water sources is avoided; the change of mechanical control water flow is more stable, the service life is long, and the structure is stable.

Description

Technical Field

[0001] The invention relates to the technical field of water conservancy irrigation, and in particular to a drainage structure for water conservancy irrigation and a drainage irrigation method. Background Art

[0002] Water conservancy projects usually refer to various engineering projects built to control, utilize and protect surface and underground water resources and the environment. In order to make full use of natural water resources, humans have established a water conservancy project system. Water conservancy projects can store and regulate natural water resources to a certain extent to cope with natural disasters such as floods and droughts. Among them, farmland ditches are also one of the conveniences of water conservancy projects. In the process of agricultural irrigation in rural areas, farmland ditches can manage and transport farmland water resources very well.

[0003] However, the following problems still exist in the current patent: when the water source flows into the drain pipe, the aquatic products and debris in the water source will block the filtering structure at the water inlet in the drain pipe. The filtering structure is located in the deep water area and is difficult to maintain. In addition, a solenoid valve is often used to control the amount of water flow. The electrical structure of the solenoid valve is unstable and the amount of water flow cannot be changed in time with the change of water pressure, which easily leads to a waste of water resources. Too much or too little water will affect the production of crops. Summary of the invention

[0004] The object of the present invention is to provide a drainage structure and a drainage irrigation method for water conservancy irrigation to solve the problems raised in the above background technology.

[0005] The technical solution of the present invention is: a drainage structure for water conservancy irrigation, comprising a drainage pipe, an irrigation canal and a mechanical floating assembly, wherein the drainage pipe is arranged in a dam body, one end of the drainage pipe is connected to a water area, and the other end of the drainage pipe is connected to the irrigation canal, and two sealing plates are arranged at the opening of the other end of the drainage pipe, and the sealing plates are rotatably arranged at the opening of the other end of the drainage pipe;

[0006] The mechanical floating assembly includes a connecting bar, a counterweight block and a floating block. A driving part is provided at the bottom of the connecting bar, the top of the connecting bar is connected to the counterweight block, the top of the counterweight block is connected to the floating block, the floating block floats on the water surface, and the floating block is used to drive the connecting bar to move up and down.

[0007] Preferably, a first mounting plate is fixedly connected to the drain pipe, and two rotating shafts are symmetrically rotatably connected to the first mounting plate. Vertical bars are fixedly connected to the ends of the rotating shafts, and the bottoms of the vertical bars are fixedly connected to the sealing plates on the corresponding sides. A transmission gear is fixedly connected to the outer peripheral wall of the rotating shaft, and the driving part includes a driving bar, and tooth plates are fixedly connected to the two outer walls of the driving bar, and the tooth plates are meshingly connected to the transmission gears on the corresponding sides.

[0008] Preferably, the drain pipe is also fixedly connected to a second mounting plate, the second mounting plate is slidably connected to a horizontal bar, and the end of the horizontal bar is fixedly connected to the outer wall of the connecting bar.

[0009] Preferably, a plurality of drainage outlets are provided on the irrigation channel, a filter screen is provided on the drainage outlet, and each drainage outlet is connected to a branch pipe.

[0010] Preferably, two mounting strips are symmetrically arranged on the irrigation channel, and a plurality of push plates are arranged on the mounting strips, wherein a concentric plate is arranged on one side of the top of the outermost push plate, one end of the concentric plate is rotatably connected to the outer sides of the two push plates, and the other end of the concentric plate is fixedly connected to the dam body, a linkage groove is arranged on one side of the push plate, a linkage rod is fixedly connected to the outer wall of the sealing plate, and the linkage rod drives the push plate to rotate synchronously through the linkage groove, and the drainage pipe is a telescopic sleeve structure.

[0011] Preferably, the drain pipe includes an outer tube and an inner tube, the inner tube can slide along the inner wall of the outer tube, a hydraulic push rod is fixedly connected to the outer wall of the outer tube, and the telescopic end of the hydraulic push rod is fixedly connected to the outer wall of the inner tube.

[0012] Preferably, it also includes a driving motor, a third mounting plate is fixedly connected to the drainage pipe, the third mounting plate is fixedly connected to the driving motor, a linkage gear is fixedly connected to the output shaft of the driving motor, a rack is provided on the connecting bar, the linkage gear is meshingly connected with the rack, and collecting troughs are provided on both sides of the irrigation channel, and a plurality of water outlets are opened in the collecting troughs.

[0013] Preferably, the rotation centers of the sealing plate and the push plate are on the same straight line.

[0014] Preferably, the push plates and the mounting strip are made of plastic, and a plurality of push plates are connected to the mounting strip by plastic snap-fitting, and the mounting strip is composed of a plurality of strip-shaped structures snap-fitted together.

[0015] A drainage irrigation method of a drainage structure for water conservancy irrigation, comprising the following steps:

[0016] S1: Water enters from the drainage pipe and then enters the irrigation canal;

[0017] S2: The height of the floating block changes with the change of the liquid level in the water area. The floating block drives the connecting bar to move up and down synchronously. When the connecting bar moves up and down, the connecting bar drives the two sealing plates to rotate through the driving part, thereby opening the outlet of the drain pipe. According to the height of the liquid level in the water area, the size of the outlet is automatically and adaptively adjusted;

[0018] S3: The water source enters the irrigation canal and then flows into multiple tributary pipes, realizing branched flow of water source and irrigation;

[0019] S4: After the irrigation work is completed, the drainage pipe is closed, and then the driving motor controls the linkage gear to rotate. The driving force of the driving motor can overcome the influence of buoyancy and gravity, driving the rack and the connecting strip to move up and down, thereby controlling the sealing plate to achieve an angle flip;

[0020] S5: First, the two sealing plates are controlled to be completely closed, the hydraulic push rod pushes the inner tube to move toward the irrigation channel, the linkage rod is plugged into the linkage groove, and then the driving motor controls the two sealing plates to flip outward, and drives multiple push plates to flip synchronously. When the push plates flip, they can clean and drive the debris in the irrigation channel, so that the debris enters the collection grooves on both sides. After the debris is cleaned and collected, the driving force of the driving motor is eliminated. Under the action of buoyancy, the two sealing plates flip and recover with the height of the liquid level to ensure the normal flow of water during water flow.

[0021] The present invention provides a drainage structure and drainage irrigation method for water conservancy irrigation through improvement, which has the following improvements and advantages compared with the prior art:

[0022] First, the liquid level of the present invention is lowered, the water pressure is reduced, but the water outlet becomes larger, that is, the flow rate through the drain pipe per unit time remains unchanged, on the contrary, the liquid level rises, the water outlet will become smaller, so that the size of the water outlet can be automatically and adaptively adjusted according to the height of the liquid level in the water area to ensure that the water flow rate remains unchanged, ensure the accuracy of irrigation, avoid waste of water resources, and compared with the solenoid valve control of the flow rate, the mechanical control of the water flow rate is more stable, has a long service life, and a stable structure.

[0023] Second, each branch pipe of the present invention conducts branch flow of water source to realize large-scale irrigation, and the filter net can filter out debris in the water source.

[0024] Thirdly, the hydraulic push rod of the present invention pushes the inner tube to move toward the irrigation channel, the linkage rod is plugged into the linkage groove, and then the driving motor controls the two sealing plates to flip outward, and drives multiple push plates to flip synchronously. When the push plates flip, they can clean and drive the debris in the irrigation channel, so that the debris enters the collection grooves on both sides. After the debris is cleaned and collected, the driving force of the driving motor is eliminated. Under the action of buoyancy, the two sealing plates flip and recover with the height of the liquid level, ensuring the normal flow of water during water flow.

[0025] Fourthly, the water inlet of the drain pipe in the present invention is not provided with a filtering structure. If a filtering structure is conventionally provided, impurities in the water will be adsorbed on the filtering structure. Since the water inlet of the drain pipe is generally located in the bottom area of ​​a deeper water area, cleaning is difficult. The filtering structure is provided on the irrigation channel. While ensuring smooth water flow, it is easy to clean the filtering structure and isolate debris from the water source channel, thereby ensuring the water quality of the water source.

[0026] Fifth, in the present invention, a plurality of push plates are connected to the mounting strip by plastic clipping, and the mounting strip is composed of a plurality of strip-shaped structures clipped together, which has low construction difficulty and is convenient for transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 It is a schematic diagram of the overall structure of the invention;

[0029] Figure 2 It is a top view schematic diagram of the overall structure of the invention;

[0030] Figure 3 It is a schematic plan view of the drain pipe and the sealing plate of the present invention;

[0031] Figure 4 It is a schematic diagram of the three-dimensional structure of the drainage pipeline of the present invention;

[0032] Figure 5 for Figure 4 A in the enlarged view;

[0033] Figure 6 It is a schematic diagram of the three-dimensional structure of the push plate and the mounting strip of the present invention;

[0034] Figure 7 It is a cross-sectional schematic diagram of the push plate and the mounting strip of the present invention.

[0035] In the figure: 1. drain pipe; 101. sealing plate; 102. connecting strip; 103. counterweight; 104. floating block; 105. first mounting plate; 106. rotating shaft; 107. vertical bar; 108. transmission gear; 109. driving bar; 110. tooth plate; 111. second mounting plate; 112. horizontal bar; 2. irrigation channel; 201. drain outlet; 202. branch pipe; 203. mounting strip; 204. push plate; 205. concentric plate; 206. linkage groove; 207. linkage rod; 208. hydraulic push rod; 209. third mounting plate; 210. driving motor; 211. linkage gear; 212. rack; 213. collecting tank. DETAILED DESCRIPTION

[0036] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0037] The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention.

[0038] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of the present invention.

[0039] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0040] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] Example

[0042] like Figure 1-Figure 7 As shown, the present invention provides a drainage structure for water conservancy irrigation, including a drainage pipe 1, an irrigation canal 2 and a mechanical floating assembly, wherein the drainage pipe 1 is arranged in the dam body, one end of the drainage pipe 1 is connected to the water area, and the other end of the drainage pipe 1 is connected to the irrigation canal 2, and two sealing plates 101 are arranged at the opening of the other end of the drainage pipe 1, and the sealing plates 101 are rotatably arranged at the opening of the other end of the drainage pipe 1;

[0043] The mechanical floating assembly includes a connecting bar 102, a counterweight block 103 and a floating block 104. A driving part is provided at the bottom of the connecting bar 102. The top of the connecting bar 102 is connected to the counterweight block 103. The top of the counterweight block 103 is connected to the floating block 104. The floating block 104 floats on the water surface. The floating block 104 is used to drive the connecting bar 102 to move up and down.

[0044] Specifically: the water source for irrigation enters from the drainage pipe 1, and then enters the irrigation channel 2, and the water source is distributed through the irrigation channel 2. The height of the floating block 104 changes with the change of the liquid level of the water area. The floating block 104 drives the connecting bar 102 to move up and down synchronously. When the connecting bar 102 moves up and down, the connecting bar 102 drives the two sealing plates 101 to rotate through the driving part, so as to open the water outlet of the drainage pipe 1;

[0045] That is, the water source flow at the outlet of the drain pipe 1 is related to the liquid level height of the water area. When the liquid level height of the water area decreases, the water pressure decreases, and the water flow rate will decrease. At this time, the floating block 104 drives the connecting bar 102 to descend, and the connecting bar 102 drives the two sealing plates 101 to achieve an angle flip, so that the outlet of the drain pipe 1 becomes larger to provide water flow. It can be understood that: the liquid level decreases, the water pressure decreases, but the water outlet becomes larger, that is, the flow through the drain pipe 1 per unit time remains unchanged. On the contrary, when the liquid level rises, the water outlet will become smaller, so that the size of the water outlet can be automatically and adaptively adjusted according to the height of the liquid level in the water area to ensure that the water flow rate remains unchanged, ensure the accuracy of irrigation, and avoid waste of water resources. Compared with the solenoid valve control of flow, the mechanical control of water flow change is more stable, has a long service life, and a stable structure.

[0046] A first mounting plate 105 is fixedly connected to the drain pipe 1, and two rotating shafts 106 are symmetrically connected to the first mounting plate 105 for rotation. A vertical bar 107 is fixedly connected to the end of the rotating shaft 106, and the bottom of the vertical bar 107 is fixedly connected to the sealing plate 101 on the corresponding side. A transmission gear 108 is fixedly connected to the outer peripheral wall of the rotating shaft 106. The driving part includes a driving bar 109, and tooth plates 110 are fixedly connected to the two outer walls of the driving bar 109. The tooth plates 110 are meshed with the transmission gears 108 on the corresponding sides. The tooth plates 110 move up and down synchronously with the driving bar 109, and the tooth plates 110 drive the two transmission gears 108 to rotate, thereby driving the sealing plate 101 to revolve around the center of the rotating shaft 106 to achieve a change in the size of the water outlet.

[0047] The drain pipe 1 is also fixedly connected to a second mounting plate 111 , to which a horizontal bar 112 is slidably connected. The end of the horizontal bar 112 is fixedly connected to the outer wall of the connecting bar 102 , and the connecting bar 102 can slide stably on the second mounting plate 111 through the horizontal bar 112 .

[0048] A plurality of drain outlets 201 are provided on the irrigation channel 2, and a filter net is arranged on the drain outlet 201. Each drain outlet 201 is connected to a branch pipe 202. The water source in the drainage pipe 1 flows into the irrigation channel 2, and then flows through each branch pipe 202 to branch the water source, thereby realizing large-scale irrigation. The filter net can filter out debris in the water source.

[0049] Two mounting bars 203 are symmetrically arranged on the irrigation channel 2, and a plurality of push plates 204 are arranged on the mounting bars 203, wherein a concentric plate 205 is arranged on one side of the top of the outermost push plate 204, one end of the concentric plate 205 is rotatably connected to the outer sides of the two push plates 204, and the other end of the concentric plate 205 is fixedly connected to the dam body, a linkage groove 206 is arranged on one side of the push plate 204, and a linkage rod 207 is fixedly connected to the outer wall of the sealing plate 101, and the linkage rod 207 drives the push plate 204 to rotate synchronously through the linkage groove 206, and the drainage pipe 1 is a telescopic sleeve structure.

[0050] The drain pipe 1 includes an outer pipe and an inner pipe. The inner pipe can slide along the inner wall of the outer pipe. A hydraulic push rod 208 is fixedly connected to the outer wall of the outer pipe. The telescopic end of the hydraulic push rod 208 is fixedly connected to the outer wall of the inner pipe.

[0051] It also includes a driving motor 210, a third mounting plate 209 is fixedly connected to the drainage pipe 1, the third mounting plate 209 is fixedly connected to the driving motor 210, a linkage gear 211 is fixedly connected to the output shaft of the driving motor 210, a rack 212 is provided on the connecting bar 102, the linkage gear 211 is meshingly connected with the rack 212, and collecting troughs 213 are provided on both sides of the irrigation channel 2, and a plurality of water outlets are opened in the collecting trough 213.

[0052] Specifically: after the irrigation work is completed, the drainage pipe 1 is closed, and then the driving motor 210 controls the linkage gear 211 to rotate. The driving force of the driving motor 210 can overcome the influence of buoyancy and gravity, and drive the rack 212 and the connecting bar 102 to move up and down, thereby controlling the sealing plate 101 to achieve an angle flip;

[0053] After the two sealing plates 101 are completely closed, the hydraulic push rod 208 pushes the inner tube to move toward the irrigation channel 2, the linkage rod 207 is plugged into the linkage groove 206, and then the driving motor 210 controls the two sealing plates 101 to flip outward, and drives multiple push plates 204 to flip synchronously. When the push plates 204 flip, they can clean and drive the debris in the irrigation channel 2, so that the debris enters the collection grooves 213 on both sides. After the debris is cleaned and collected, the driving force of the driving motor 210 is eliminated. Under the action of buoyancy, the two sealing plates 101 flip and recover with the height of the liquid level, ensuring the normal flow of water during the water flow period;

[0054] It is understandable that there will be aquatic products and debris in the water flow. If the aquatic products and debris are not treated for a long time in the irrigation channel 2, they will deteriorate. When the water source enters the irrigation channel 2 next time, the deteriorated aquatic products and debris will affect the water quality, resulting in a decline in irrigation quality.

[0055] In addition, no filtering structure is provided at the water inlet of the drain pipe 1. If a filtering structure is conventionally provided, impurities in the water will be adsorbed on the filtering structure. Since the water inlet of the drain pipe 1 is generally located in the bottom area of ​​a deeper water area, cleaning is difficult. In the present invention, the filtering structure is provided on the irrigation channel 2. While ensuring smooth water flow, the filtering structure can be easily cleaned and debris can be isolated from the water source channel, thereby ensuring the water quality of the water source.

[0056] The rotation centers of the sealing plate 101 and the push plate 204 are on the same straight line. When the centers are on the same straight line, the sealing plate 101 drives the push plate 204 to flip more stably.

[0057] The push plates 204 and the mounting strips 203 are made of plastic. The push plates 204 are connected to the mounting strips 203 by plastic snap-fitting. The mounting strips 203 are composed of a plurality of strip-shaped structures snap-fitted together.

[0058] A drainage irrigation method of a drainage structure for water conservancy irrigation, comprising the following steps:

[0059] S1: Water enters from drainage pipe 1 and then enters irrigation canal 2;

[0060] S2: The height of the floating block 104 changes with the change of the liquid level in the water area. The floating block 104 drives the connecting bar 102 to move up and down synchronously. When the connecting bar 102 moves up and down, the connecting bar 102 drives the two sealing plates 101 to rotate through the driving part, thereby opening the water outlet of the drain pipe 1. According to the height of the liquid level in the water area, the size of the water outlet is automatically and adaptively adjusted;

[0061] S3: The water source enters the irrigation channel 2 and then flows into the multiple branch pipes 202, thereby achieving branched flow of the water source and irrigation;

[0062] S4: After the irrigation work is completed, the drainage pipe 1 is closed, and then the driving motor 210 controls the linkage gear 211 to rotate. The driving force of the driving motor 210 can overcome the influence of buoyancy and gravity, and drive the rack 212 and the connecting bar 102 to move up and down, thereby controlling the sealing plate 101 to achieve an angle flip;

[0063] S5: First, the two sealing plates 101 are controlled to be completely closed, the hydraulic push rod 208 pushes the inner tube to move toward the irrigation channel 2, the linkage rod 207 is plugged into the linkage groove 206, and then the driving motor 210 controls the two sealing plates 101 to flip outward, and drives multiple push plates 204 to flip synchronously. When the push plates 204 flip, they can clean and drive the debris in the irrigation channel 2, so that the debris enters the collection grooves 213 on both sides. After the debris is cleaned and collected, the driving force of the driving motor 210 is eliminated. Under the action of buoyancy, the two sealing plates 101 flip and recover with the height of the liquid level to ensure the normal flow of water during water flow.

[0064] The above description enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A drainage structure for water conservancy irrigation, comprising a drainage pipe (1), an irrigation channel (2) and a mechanical floating assembly, characterized in that: The drainage pipe (1) is arranged in the dam body, one end of the drainage pipe (1) is connected to the water area, and the other end of the drainage pipe (1) is connected to the irrigation channel (2). Two sealing plates (101) are arranged at the opening of the other end of the drainage pipe (1), and the sealing plates (101) are rotatably arranged at the opening of the other end of the drainage pipe (1); The mechanical floating assembly comprises a connecting bar (102), a counterweight block (103) and a floating block (104); a driving unit is arranged at the bottom of the connecting bar (102); the top of the connecting bar (102) is connected to the counterweight block (103); the top of the counterweight block (103) is connected to the floating block (104); the floating block (104) floats on the water surface; and the floating block (104) is used to drive the connecting bar (102) to move up and down.

2. A drainage structure for water conservancy irrigation according to claim 1, characterized in that: The drain pipe (1) is fixedly connected to a first mounting plate (105), and two rotating shafts (106) are symmetrically rotatably connected to the first mounting plate (105). The ends of the rotating shafts (106) are fixedly connected to vertical bars (107), and the bottoms of the vertical bars (107) are fixedly connected to the sealing plates (101) on the corresponding sides. A transmission gear (108) is fixedly connected to the outer peripheral wall of the rotating shaft (106), and the driving part includes a driving bar (109), and the outer two walls of the driving bar (109) are fixedly connected to tooth plates (110), and the tooth plates (110) are meshingly connected to the transmission gears (108) on the corresponding sides.

3. The drainage structure for water conservancy irrigation according to claim 1, characterized in that: The drain pipe (1) is also fixedly connected to a second mounting plate (111), the second mounting plate (111) is slidably connected to a horizontal bar (112), and the end of the horizontal bar (112) is fixedly connected to the outer wall of the connecting bar (102).

4. The drainage structure for water conservancy irrigation according to claim 1, characterized in that: The irrigation channel (2) is provided with a plurality of drainage outlets (201), each of the drainage outlets (201) is provided with a filter screen, and each of the drainage outlets (201) is connected to a branch pipe (202).

5. The drainage structure for water conservancy irrigation according to claim 1, characterized in that: Two mounting strips (203) are symmetrically arranged on the irrigation channel (2), and a plurality of push plates (204) are arranged on the mounting strips (203), wherein a concentric plate (205) is arranged on one side of the top of the outermost push plate (204), one end of the concentric plate (205) is rotatably connected to the outer sides of the two push plates (204), and the other end of the concentric plate (205) is fixedly connected to the dam body, a linkage groove (206) is arranged on one side of the push plate (204), and a linkage rod (207) is fixedly connected to the outer wall of the sealing plate (101), and the linkage rod (207) drives the push plate (204) to rotate synchronously through the linkage groove (206), and the drainage pipe (1) is a telescopic sleeve type structure.

6. The drainage structure for water conservancy irrigation according to claim 1, characterized in that: The drainage pipe (1) comprises an outer pipe and an inner pipe, the inner pipe can slide along the inner wall of the outer pipe, a hydraulic push rod (208) is fixedly connected to the outer wall of the outer pipe, and the telescopic end of the hydraulic push rod (208) is fixedly connected to the outer wall of the inner pipe.

7. The drainage structure for water conservancy irrigation according to claim 1, further comprising a driving motor (210), characterized in that: A third mounting plate (209) is fixedly connected to the drainage pipe (1), the third mounting plate (209) is fixedly connected to the drive motor (210), a linkage gear (211) is fixedly connected to the output shaft of the drive motor (210), a rack (212) is provided on the connecting bar (102), the linkage gear (211) is meshingly connected to the rack (212), and collecting troughs (213) are provided on both sides of the irrigation channel (2), and a plurality of water outlets are provided in the collecting troughs (213).

8. The drainage structure for water conservancy irrigation according to claim 5, characterized in that: The centers of rotation of the sealing plate (101) and the push plate (204) are located on the same straight line.

9. The drainage structure for water conservancy irrigation according to claim 5, characterized in that: The push plates (204) and the mounting strips (203) are made of plastics. The plurality of push plates (204) are connected to the mounting strips (203) by means of plastic snap-fitting. The mounting strips (203) are composed of a plurality of strip-shaped structures snap-fitted together.

10. A drainage irrigation method using a drainage structure for water conservancy irrigation, characterized in that: The following steps are involved: S1: Water enters from the drainage pipe (1) and then enters the irrigation canal (2); S2: The height of the floating block (104) changes with the change of the liquid level in the water area, and the floating block (104) drives the connecting bar (102) to move up and down synchronously. When the connecting bar (102) moves up and down, the connecting bar (102) drives the two sealing plates (101) to rotate through the driving part, thereby opening the water outlet of the drainage pipe (1), and automatically and adaptively adjusting the size of the water outlet according to the height of the liquid level in the water area; S3: The water source enters the irrigation channel (2), and then flows into a plurality of branch pipes (202), thereby achieving branched flow of the water source and irrigation; S4: After the irrigation work is completed, the drainage pipe (1) is closed, and then the driving motor (210) controls the linkage gear (211) to rotate. The driving force of the driving motor (210) can overcome the influence of buoyancy and gravity, and drive the rack (212) and the connecting bar (102) to move up and down, thereby controlling the sealing plate (101) to achieve an angle flip; S5: First, the two sealing plates (101) are controlled to be completely closed, the hydraulic push rod (208) pushes the inner tube to move in the direction of the irrigation channel (2), the linkage rod (207) is plugged into the linkage groove (206), and then the driving motor (210) controls the two sealing plates (101) to flip outward, and drives the multiple push plates (204) to flip synchronously. When the push plates (204) flip, they can clean and drive the debris in the irrigation channel (2), so that the debris enters the collection grooves (213) on both sides. After the debris is cleaned and collected, the driving force of the driving motor (210) is eliminated. Under the action of buoyancy, the two sealing plates (101) flip and recover with the height of the liquid level, ensuring the normal flow of water during the water flow period.

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