Flow dividing irrigation gate and farmland ridge dividing irrigation method

Abstract

The invention relates to the technical field of agricultural water saving, and discloses a split-flow irrigation gate and a farmland ridge-dividing irrigation method. In each opening stage of the trunk canal gate, the opening degree of the trunk canal gate is gradually increased, so that the water runoff of the next opening stage of the trunk canal gate is larger than the water runoff of the previous opening stage of the trunk canal gate, and the opening degree of the trunk canal gate can be effectively adjusted according to the opening number of the branch canal gates; meanwhile, as the widths of the trunk canal gates from bottom to top are consistent, and the added value of the opening degree of the trunk canal gate in the next opening stage is smaller than the added value of the opening degree of the trunk canal gate in the previous opening stage, the change of the water flow velocity caused by the water flow height can be effectively balanced, and then distribution of irrigation water can be effectively guaranteed; and through the arrangement of the main canal desilting mechanism and the branch canal desilting mechanism, the irrigation capacity of the irrigation area where the irrigation device is located is effectively guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of agricultural water conservation, and particularly to a diversion irrigation gate and a farmland sub-ridge irrigation method. Background Art

[0002] The diversion irrigation gate is a key facility in farmland water conservancy projects, mainly used to regulate the water flow direction and flow distribution. In the traditional irrigation system, as the core facility for water flow distribution, the gate usually adopts a single gate opening independent control mode, which has significant defects in terms of water flow distribution accuracy, multi-region collaborative operation, and long-term operation and maintenance costs. Especially in the field of farmland sub-ridge irrigation, the diversion irrigation gate can be widely applied.

[0003] For example, in terraced fields or large-area farmland scenarios, multiple gates need to be manually adjusted one by one to meet the irrigation needs of different plots. Operators need to frequently shuttle between the gates, which not only takes time and effort (the average time-consuming for a single water distribution operation can reach 3 - 5 hours), but also is difficult to dynamically adjust according to real-time water level changes, resulting in unbalanced water volume distribution between upstream and downstream, frequent problems such as over-irrigation in some areas and insufficient water supply in other areas. According to statistics, the water resource waste rate caused by uneven distribution in the traditional gate system is as high as 25% - 40%.

[0004] The gate structure design has insufficient ability to prevent and control sediment deposition. Suspended particles in the water gradually accumulate at the bottom of the gate chamber. Especially in flood seasons or rivers with high sediment content, the sedimentation thickness can increase by 10 - 15 centimeters per year, resulting in an increase in the opening and closing resistance of the gate (in extreme cases, the load of the opening and closing motor increases by more than 30%), and even causing mechanical failures such as gate plate deformation or guide rail jamming, seriously affecting the reliability and service life of the irrigation system. Moreover, irrigation needs to be interrupted during silt cleaning, causing direct economic losses to agricultural production. Summary of the Invention

[0005] In view of the deficiencies of the prior art, the present invention provides a diversion irrigation gate and a farmland sub-ridge irrigation method.

[0006] To solve the above technical problems, the present invention provides the following technical solutions:

[0007] A diversion irrigation gate, comprising a diversion main canal and a plurality of diversion branch canals, the diversion main canal is communicated with each of the diversion branch canals, a main canal gate is arranged at one end of the diversion main canal away from each of the diversion branch canals, and a branch canal gate is arranged at one end of each of the diversion branch canals away from the diversion main canal; the main canal gate comprises a plurality of opening stages, and each time a branch canal gate is opened, the main canal gate enters the next opening stage from the previous opening stage; within each opening stage of the main canal gate, the opening degree of the main canal gate gradually increases, and the increase value of the opening degree of the main canal gate in the next opening stage is smaller than the increase value of the opening degree of the main canal gate in the previous opening stage; a main canal dredging mechanism is arranged at the bottom end of the main canal gate, and the main canal dredging mechanism can dredge a part of the diversion main canal on both sides of the main canal gate in the first opening stage of the main canal gate; branch canal dredging mechanisms are arranged at the bottom ends of the branch canal gates respectively, and the branch canal dredging mechanisms can dredge a part of the diversion branch canals on both sides of the corresponding branch canal gates during the opening process of the branch canal gates.

[0008] Preferably, the width of the main canal gate is the same from bottom to top, and the water flow rate in the next opening stage of the main canal gate is greater than that in the previous opening stage of the main canal gate; in each opening stage of the main canal gate, as the opening degree of the corresponding branch canal gate increases, the opening degree of the main canal gate also gradually increases; the main canal gate further comprises a plurality of closing stages, and each time a branch canal gate is closed, the main canal gate enters the next closing stage from the previous closing stage.

[0009] Preferably, a main canal receiving groove is arranged at the bottom end of the diversion main canal where the main canal gate is located, a main canal sealing plate is arranged at the center of the top end of the main canal receiving groove, and a main canal sealing groove is arranged at the top end of the main canal sealing plate; the main canal dredging mechanism is arranged inside the main canal receiving groove, and main canal dredging openings are respectively arranged at both sides of the main canal sealing plate at the top end of the main canal receiving groove.

[0010] Preferably, the main canal gate comprises a main canal gate frame, a main canal sealing plate and a main canal closing mechanism, the main canal sealing plate is movably installed inside the main canal gate frame, and the main canal closing mechanism is arranged at the top end of the main canal gate frame; the main canal closing mechanism comprises a main canal closing connecting rod and a main canal closing motor, the main canal closing motor is power-transmitted with the main canal closing connecting rod, main canal closing sprockets are respectively arranged at both ends of the main canal closing connecting rod, main canal driving chains are respectively arranged at both ends of one side of the main canal sealing plate close to the main canal closing mechanism, and one main canal driving chain is meshed with one main canal closing sprocket respectively.

[0011] Preferably, the main canal dredging mechanism includes two main canal opening sealing plates. A main canal installation rotating shaft is provided on one side of each main canal opening sealing plate, and a main canal rubber sealing strip is provided on the other side of each main canal opening sealing plate. A main canal sealing plate driving gear is provided on one side of each main canal installation rotating shaft. On one side of the main canal sealing plate and inside the main canal gate frame, two main canal driving racks are provided, and the main canal driving racks can extend from inside the main canal gate frame into the main canal accommodation groove.

[0012] Preferably, in the first opening stage of the main canal gate, the main canal dredging mechanism can be disengaged from the main canal sealing groove. The two main canal driving racks are respectively engaged with the two main canal sealing plate driving gears, driving the two main canal opening sealing plates to rotate towards the side close to each other, opening the two main canal dredging openings. The water flow inside the diversion main canal can pass through the main canal accommodation groove and the main canal gate, and flush away the silt accumulated by the main canal gate under the drop provided by the main canal accommodation groove. During the closing process of the main canal gate, the main canal gate can gradually extend into the main canal sealing groove, and the main canal dredging mechanism can gradually close the two main canal dredging openings respectively.

[0013] Preferably, a branch canal accommodation groove is provided at the bottom end of the branch canal of the diversion branch canal. A branch canal sealing plate is provided at the center of the top end of the branch canal accommodation groove, and a branch canal sealing groove is provided at the top end of the branch canal sealing plate. The branch canal dredging mechanism is arranged inside the branch canal accommodation groove. Branch canal dredging openings are respectively provided on both sides of the branch canal sealing plate at the top end of the branch canal accommodation groove. The branch canal gate includes a branch canal gate frame, a branch canal sealing plate, and a branch canal closing mechanism. The branch canal sealing plate is movably installed inside the branch canal gate frame, and the branch canal closing mechanism is provided at the top end of the branch canal gate frame.

[0014] Preferably, the branch canal closing mechanism includes a branch canal closing connecting rod and a branch canal closing motor. Power transmission is carried out between the branch canal closing motor and the branch canal closing connecting rod. Branch canal closing sprockets are respectively provided at both ends of the branch canal closing connecting rod. Branch canal driving chains are respectively provided at both ends of the side of the branch canal sealing plate close to the branch canal closing mechanism. One branch canal driving chain is respectively engaged with one branch canal closing sprocket. The branch canal dredging mechanism includes two branch canal opening sealing plates. A branch canal installation rotating shaft is provided on one side of each branch canal opening sealing plate, and a branch canal rubber sealing strip is provided on the other side of each branch canal opening sealing plate. A branch canal sealing plate driving gear is provided on one side of each branch canal installation rotating shaft.

[0015] Preferably, during the closing process of the branch canal gate, the branch canal gate can gradually extend into the interior of the branch canal sealing plate, and the branch canal dredging mechanism can gradually close the two branch canal dredging openings respectively; on one side of the branch canal sealing plate and inside the branch canal gate frame, there are two branch canal driving racks, and the branch canal driving racks can extend from inside the branch canal gate frame into the branch canal receiving groove, and the two branch canal driving racks are respectively engaged with the two branch canal sealing plate driving gears; during the process of the branch canal gate gradually opening, the branch canal dredging mechanism can disengage from the branch canal sealing groove, and the two branch canal opening sealing plates gradually rotate towards the side close to each other, gradually opening the two branch canal dredging openings, and the water flow inside the diversion branch canal can pass through the branch canal receiving groove and the branch canal gate, and wash away the silt accumulated by the branch canal gate under the drop provided by the branch canal receiving groove.

[0016] A farmland ridge irrigation method uses the above-mentioned diversion irrigation gate, and includes the following steps:

[0017] Connect the diversion main canal with the irrigation canals of the farmland, and connect each diversion branch canal with each ridge opening of the farmland respectively;

[0018] Open the branch canal gates corresponding to the ridges to be irrigated. Each time a branch canal gate is opened, the main canal gate enters the next opening stage from the previous opening stage;

[0019] While each branch canal gate is opened, the branch canal dredging mechanism dredges part of the diversion branch canals on both sides of the branch canal gate;

[0020] When the first branch canal gate is opened, the main canal gate is in the first opening stage, and the main canal dredging mechanism dredges part of the diversion main canals on both sides of the main canal gate.

[0021] Compared with the prior art, the present invention provides a diversion irrigation gate and a farmland ridge irrigation method, which have the following beneficial effects:

[0022] 1. When irrigation is required in a certain irrigation area, for this kind of diversion irrigation gate, by opening the corresponding branch canal gate, the main canal can be diverted. Each time a branch canal gate is opened, the main canal gate enters the next opening stage from the previous opening stage. During each opening stage of the main canal gate, the opening degree of the main canal gate gradually increases, so that the water flow rate in the next opening stage of the main canal gate is greater than that in the previous opening stage of the main canal gate. Thus, the opening degree of the main canal gate can be effectively adjusted according to the number of opened branch canal gates. At the same time, since the width of the main canal gate from bottom to top is the same, and the increase in the opening degree of the main canal gate in the next opening stage is less than that in the previous opening stage, the change in water flow velocity caused by the water height can be effectively balanced. Therefore, the distribution of irrigation water can be effectively guaranteed, and the purpose of saving water can be effectively achieved.

[0023] 2. In addition, for this kind of diversion irrigation gate, since the main canal dredging mechanism can dredge part of the diversion main canal on both sides of the main canal gate during the first opening stage of the main canal gate, and the branch canal dredging mechanism can dredge part of the diversion branch canal on both sides of the corresponding branch canal gate during the opening process of the branch canal gate, the resistance increase of the main canal gate and each branch canal gate caused by silt accumulation can be effectively avoided. While reducing the energy consumption of opening the main canal gate and each branch canal gate, mechanical failures such as gate plate deformation or guide rail jamming can be avoided, and the irrigation capacity of the irrigation area where it is located can be effectively guaranteed.

[0024] 3. Under the power output provided by the main canal closing motor, the main canal closing connecting rod drives the main canal closing sprocket to rotate. Thus, the main canal driving chain and the main canal sealing plate are driven to move synchronously through the main canal closing sprocket. In the first opening stage of the main canal gate, the two main canal driving racks arranged at the bottom end of the main canal sealing plate are respectively engaged with the two main canal sealing plate driving gears. During the upward lifting process of the main canal sealing plate, the two main canal installation rotating shafts can be driven to drive the two main canal opening sealing plates to rotate towards each other, so that the two main canal dredging openings can be opened. The water flow inside the diversion main canal can pass through the main canal accommodating groove and the main canal gate, and the silt accumulated on the main canal gate can be washed away under the drop provided by the main canal accommodating groove. Thus, the two sides of the main canal gate can be effectively dredged, reducing the energy consumption of opening the main canal gate and avoiding mechanical failures such as deformation of the main canal sealing plate, and effectively guaranteeing the irrigation capacity of the irrigation area where it is located.

[0025] 4. This method of farmland ridge irrigation can effectively reduce the waste of irrigation water in farmland ridge irrigation through the linkage between each branch canal gate and the main canal gate. And through the setting of the main canal dredging mechanism and the branch canal dredging mechanism, the dredging operation can be carried out for each branch canal gate and the main canal gate respectively, which can reduce the silt accumulation caused by being set in the farmland, avoid the increase of the opening and closing resistance of the gate and the resulting gate failure, and can also carry out dredging without stopping irrigation to ensure the continuity of irrigation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a three-dimensional structural schematic diagram of a diversion irrigation gate of the present invention;

[0027] Figure 2 is one of the assembly structural schematic diagrams of the diversion main canal, the main canal gate and the main canal dredging mechanism of a diversion irrigation gate of the present invention;

[0028] Figure 3 is the second of the assembly structural schematic diagrams of the diversion main canal, the main canal gate and the main canal dredging mechanism of a diversion irrigation gate of the present invention;

[0029] Figure 4 For the present invention Figure 3 is an enlarged view of part A;

[0030] Figure 5 is the assembly structural schematic diagram of the diversion branch canal, the branch canal gate and the branch canal dredging mechanism of a diversion irrigation gate of the present invention;

[0031] Figure 6 is one of the three-dimensional structural schematic diagrams of the diversion branch canal, the branch canal gate and the branch canal dredging mechanism of a diversion irrigation gate of the present invention;

[0032] Figure 7 is the second of the three-dimensional structural schematic diagrams of the diversion branch canal, the branch canal gate and the branch canal dredging mechanism of a diversion irrigation gate of the present invention;

[0033] Figure 8 is the sectional view of the diversion branch canal, the branch canal gate and the branch canal dredging mechanism of a diversion irrigation gate of the present invention.

[0034] In the figure: 1. Diversion main canal; 11. Main canal receiving groove; 111. Main canal silt cleaning opening; 12. Main canal sealing plate; 121. Main canal sealing groove; 2. Shunt branch canal; 21. Branch canal receiving groove; 211. Branch canal silt cleaning opening; 22. Branch canal sealing plate; 221. Branch canal sealing groove; 3. Main canal gate; 31. Main canal gate frame; 32. Main canal sealing plate; 321. Main canal driving chain; 322. Main canal driving rack; 33. Main canal closing mechanism; 331. Main canal closing connecting rod; 332. Main canal closing motor; 333. Main canal closing sprocket; 4. Branch canal gate; 41. Branch canal gate frame; 42. Branch canal sealing plate; 421. Branch canal driving chain; 422. Branch canal driving rack; 43. Branch canal closing mechanism; 431. Branch canal closing connecting rod; 432. Branch canal closing motor; 433. Branch canal closing sprocket; 5. Main canal silt cleaning mechanism; 51. Main canal opening sealing plate; 511. Main canal rubber sealing strip; 52. Main canal installation rotating shaft; 521. Main canal sealing plate driving gear; 6. Branch canal silt cleaning mechanism; 61. Branch canal opening sealing plate; 611. Branch canal rubber sealing strip; 62. Branch canal installation rotating shaft; 621. Branch canal sealing plate driving gear. Detailed implementation mode

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0036] As introduced in the background art, there are deficiencies in the prior art. To solve the above technical problems, this application proposes a shunt irrigation gate and a farmland sub-ridge irrigation method.

[0037] Embodiment 1:

[0038] Please refer to Figures 1-8, A split irrigation gate, comprising a diversion main canal 1 and several diversion branch canals 2. The diversion main canal 1 is connected to each of the diversion branch canals 2. At one end of the diversion main canal 1 away from each of the diversion branch canals 2, a main canal gate 3 is provided. At one end of each of the diversion branch canals 2 away from the diversion main canal 1, a branch canal gate 4 is provided. The main canal gate 3 includes several opening stages. Each time a branch canal gate 4 is opened, the main canal gate 3 enters the next opening stage from the previous opening stage. In each opening stage of the main canal gate 3, the opening degree of the main canal gate 3 gradually increases, and the increase in the opening degree of the main canal gate 3 in the next opening stage is less than the increase in the opening degree of the main canal gate 3 in the previous opening stage. At the bottom of the main canal gate 3, a main canal dredging mechanism 5 is provided. The main canal dredging mechanism 5 can dredge a part of the diversion main canal 1 on both sides of the main canal gate 3 in the first opening stage of the main canal gate 3. At the bottom of each of the branch canal gates 4, a branch canal dredging mechanism 6 is provided. The branch canal dredging mechanism 6 can dredge a part of the diversion branch canal 2 on both sides of the corresponding branch canal gate 4 during the opening process of the branch canal gate 4.

[0039] The width of the main canal gate 3 is the same from bottom to top. The water flow rate in the next opening stage of the main canal gate 3 is greater than the water flow rate in the previous opening stage of the main canal gate 3. In each opening stage of the main canal gate 3, as the opening degree of the corresponding branch canal gate 4 increases, the opening degree of the main canal gate 3 also gradually increases. The main canal gate 3 also includes several closing stages. Each time a branch canal gate 4 is closed, the main canal gate 3 enters the next closing stage from the previous closing stage.

[0040] During use, this split irrigation gate can be set at the position where split irrigation is required. Connect the diversion main canal 1 with the main irrigation canal (or it can also be a secondary irrigation branch canal), and connect each of the diversion branch canals 2 with each area that requires split irrigation. When irrigation is required in a certain irrigation area, by opening the corresponding branch canal gate 4, the diversion main canal 1 can enter the next opening stage from the previous opening stage each time a branch canal gate 4 is opened. In each opening stage of the main canal gate 3, the opening degree of the main canal gate 3 gradually increases, so that the water flow rate in the next opening stage of the main canal gate 3 is greater than the water flow rate in the previous opening stage of the main canal gate 3. Thus, it can effectively adjust the opening degree of the main canal gate 3 according to the number of opened branch canal gates 4. At the same time, since the width of the main canal gate 3 is the same from bottom to top, and the increase in the opening degree of the main canal gate 3 in the next opening stage is less than the increase in the opening degree of the main canal gate 3 in the previous opening stage, it can effectively balance the change in water flow velocity caused by the water height, and thus can effectively ensure the distribution of irrigation water and effectively achieve the purpose of saving water.

[0041] In addition, since the main canal dredging mechanism 5 can dredge the partial diversion main canals 1 on both sides of the main canal gate 3 during the first opening stage of the main canal gate 3; the branch canal dredging mechanism 6 can dredge the partial diversion branch canals 2 on both sides of the corresponding branch canal gate 4 during the opening process of the branch canal gate 4; it can effectively avoid the increase in the opening resistance of the main canal gate 3 and each branch canal gate 4 caused by silt accumulation, reduce the energy consumption for opening the main canal gate 3 and each branch canal gate 4, and avoid mechanical failures such as gate plate deformation or guide rail jamming, effectively ensuring the irrigation capacity of the irrigation area where it is located.

[0042] Embodiment 2:

[0043] Please refer to Figures 1-8 , which is different from the above embodiment in that a main canal receiving groove 11 is provided at the bottom end of the main canal gate 3 of the diversion main canal 1, a main canal sealing plate 12 is provided at the center of the top end of the main canal receiving groove 11, and a main canal sealing groove 121 is provided at the top end of the main canal sealing plate 12; the main canal dredging mechanism 5 is arranged inside the main canal receiving groove 11, and main canal dredging openings 111 are respectively provided at both sides of the main canal sealing plate 12 at the top end of the main canal receiving groove 11.

[0044] The main canal gate 3 includes a main canal gate frame 31, a main canal sealing plate 32 and a main canal closing mechanism 33. The main canal sealing plate 32 is movably installed inside the main canal gate frame 31, and the main canal closing mechanism 33 is provided at the top end of the main canal gate frame 31; the main canal closing mechanism 33 includes a main canal closing connecting rod 331 and a main canal closing motor 332, and power transmission is carried out between the main canal closing motor 332 and the main canal closing connecting rod 331. Main canal closing sprockets 333 are respectively provided at both ends of the main canal closing connecting rod 331, and main canal driving chains 321 are respectively provided at both ends of the side of the main canal sealing plate 32 close to the main canal closing mechanism 33, and one main canal driving chain 321 is meshed with one main canal closing sprocket 333 respectively.

[0045] The main canal dredging mechanism 5 includes two main canal opening sealing plates 51. A main canal installation rotating shaft 52 is provided on one side of each main canal opening sealing plate 51, a main canal rubber sealing strip 511 is provided on the other side of each main canal opening sealing plate 51, and a main canal sealing plate driving gear 521 is provided on one side of the main canal installation rotating shaft 52; two main canal driving racks 322 are provided inside the main canal gate frame 31 on one side of the main canal sealing plate 32, and the main canal driving racks 322 can extend from inside the main canal gate frame 31 into the main canal receiving groove 11.

[0046] In the first opening stage of the main canal gate 3, the main canal dredging mechanism 5 can disengage from the main canal sealing groove 121. The two main canal driving racks 322 are respectively engaged with the two main canal sealing plate driving gears 521, driving the two main canal opening sealing plates 51 to rotate towards the side close to each other, opening the two main canal dredging openings 111. The water flow in the main canal 1 can pass through the main canal accommodation groove 11 and the main canal gate 3, flushing away the silt accumulated on the main canal gate 3 under the drop provided by the main canal accommodation groove 11. During the closing process of the main canal gate 3, the main canal gate 3 can gradually extend into the main canal sealing groove 121, and the main canal dredging mechanism 5 can gradually close the two main canal dredging openings 111 respectively.

[0047] During specific use, the inner wall shape of the main canal accommodation groove 11 can be set to the same shape as the trajectory of the main canal rubber sealing strip 511 of the main canal opening sealing plate 51 during rotation. By the movement of the main canal rubber sealing strip 511, the silt that may remain on the inner wall of the main canal accommodation groove 11 can be removed, ensuring the sealing of the main canal dredging opening 111 by the main canal rubber sealing strip 511, effectively avoiding the entry of sludge and the blockage of the silt inside the main canal accommodation groove 11, and effectively improving the dredging effect of the main canal dredging mechanism 5.

[0048] Under the power output provided by the main canal closing motor 332, the main canal closing connecting rod 331 drives the main canal closing sprocket 333 to rotate, thereby driving the main canal driving chain 321 and the main canal sealing plate 32 to move synchronously through the main canal closing sprocket 333. In the first opening stage of the main canal gate 3, the two main canal driving racks 322 arranged at the bottom end of the main canal sealing plate 32 are respectively engaged with the two main canal sealing plate driving gears 521. During the upward lifting of the main canal sealing plate 32, the two main canal installation rotating shafts 52 can be driven to drive the two main canal opening sealing plates 51 to rotate towards the direction close to each other, thus opening the two main canal dredging openings 111. The water flow in the main canal 1 can pass through the main canal accommodation groove 11 and the main canal gate 3, flushing away the silt accumulated on the main canal gate 3 under the drop provided by the main canal accommodation groove 11, effectively dredging both sides of the main canal gate 3. On the contrary, during the closing process of the main canal gate 3, the main canal gate 3 can gradually extend into the main canal sealing groove 121, and the two main canal installation rotating shafts 52 drive the two main canal opening sealing plates 51 to rotate towards the direction away from each other, gradually closing the two main canal dredging openings 111 respectively, waiting for the next dredging process in the first opening stage of the main canal gate 3, reducing the energy consumption of the opening of the main canal gate 3 while avoiding mechanical failures such as deformation of the main canal sealing plate 32, and effectively ensuring the irrigation capacity of the irrigation area where it is located.

[0049] Embodiment Three:

[0050] Please refer to Figures 1-8, different from the above embodiments, a branch canal receiving groove 21 is provided at the bottom end of the branch canal gate 4 of the diversion branch canal 2. A branch canal sealing plate 22 is provided at the center of the top end of the branch canal receiving groove 21, and a branch canal sealing groove 221 is provided at the top end of the branch canal sealing plate 22. The branch canal dredging mechanism 6 is arranged inside the branch canal receiving groove 21. Branch canal dredging openings 211 are respectively provided at both sides of the top end of the branch canal receiving groove 21 and located on both sides of the branch canal sealing plate 22. The branch canal gate 4 includes a branch canal gate frame 41, a branch canal sealing plate 42 and a branch canal closing mechanism 43. The branch canal sealing plate 42 is movably installed inside the branch canal gate frame 41, and the branch canal closing mechanism 43 is arranged at the top end of the branch canal gate frame 41.

[0051] The branch canal closing mechanism 43 includes a branch canal closing connecting rod 431 and a branch canal closing motor 432. Power transmission is carried out between the branch canal closing motor 432 and the branch canal closing connecting rod 431. Branch canal closing sprockets 433 are respectively arranged at both ends of the branch canal closing connecting rod 431. Branch canal driving chains 421 are respectively arranged at both ends of the side of the branch canal sealing plate 42 close to the branch canal closing mechanism 43. One branch canal driving chain 421 is meshed with one branch canal closing sprocket 433 respectively. The branch canal dredging mechanism 6 includes two branch canal opening sealing plates 61. A branch canal installation rotating shaft 62 is arranged on one side of each branch canal opening sealing plate 61, a branch canal rubber sealing strip 611 is arranged on the other side of each branch canal opening sealing plate 61, and a branch canal sealing plate driving gear 621 is arranged on one side of the branch canal installation rotating shaft 62.

[0052] During the closing process of the branch canal gate 4, the branch canal gate 4 can gradually extend into the branch canal sealing plate 22, and the branch canal dredging mechanism 6 can gradually close the two branch canal dredging openings 211 respectively. Two branch canal driving racks 422 are arranged on one side of the branch canal sealing plate 42 and inside the branch canal gate frame 41. The branch canal driving racks 422 can extend into the branch canal receiving groove 21 from inside the branch canal gate frame 41, and the two branch canal driving racks 422 are meshed with the two branch canal sealing plate driving gears 621 respectively. During the process of the branch canal gate 4 gradually opening, the branch canal dredging mechanism 6 can disengage from the branch canal sealing groove 221, and the two branch canal opening sealing plates 61 gradually rotate towards the side close to each other, gradually opening the two branch canal dredging openings 211. The water flow inside the diversion branch canal 2 can pass through the branch canal receiving groove 21 and the branch canal gate 4, and flush away the silt accumulated on the branch canal gate 4 under the drop provided by the branch canal receiving groove 21.

[0053] Specifically, the process of the branch canal dredging mechanism 6 dredging the branch canal gate 4 is the same as the process of the main canal dredging mechanism 5 dredging the main canal gate 3 in the first opening stage of the main canal gate 3, and will not be elaborated here.

[0054] Embodiment 4:

[0055] A farmland ridge irrigation method uses a diversion irrigation gate as described in any one of Embodiment 1 to Embodiment 3, and includes the following steps:

[0056] Connect the diversion main canal 1 with the irrigation canals of the farmland, and connect each diversion branch canal 2 with each ridge opening of the farmland respectively;

[0057] Open the branch canal gates 4 corresponding to the ridges to be irrigated. Each time a branch canal gate 4 is opened, the main canal gate 3 enters the next opening stage from the previous opening stage;

[0058] While each branch canal gate 4 is opened, the branch canal silt cleaning mechanism 6 cleans the part of the diversion branch canal 2 on both sides of the branch canal gate 4;

[0059] When the first branch canal gate 4 is opened, the main canal gate 3 is in the first opening stage, and the main canal silt cleaning mechanism 5 cleans the part of the diversion main canal 1 on both sides of the main canal gate 3.

[0060] Thus, during use, through the linkage cooperation between each branch canal gate 4 and the main canal gate 3, the waste problem of irrigation water in farmland ridge irrigation can be effectively reduced. And through the settings of the main canal silt cleaning mechanism 5 and the branch canal silt cleaning mechanism 6, the silt cleaning operations can be carried out on each branch canal gate 4 and the main canal gate 3 respectively, which can reduce the silt accumulation caused by being set in the farmland, avoid the increase of the opening and closing resistance of the gates, and prevent gate failures. Also, the silt cleaning can be carried out without stopping irrigation, ensuring the continuity of irrigation.

[0061] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A diversion irrigation gate, comprising a main diversion channel and a plurality of diversion branches, wherein the main diversion channel is connected to each of the diversion branches, and characterized in that: A main channel gate is provided at one end of the main diversion channel away from each of the diversion branches, and a branch channel gate is provided at one end of each of the diversion branches away from the main diversion channel; The main channel gate includes several opening stages, and each time a branch channel gate is opened, the main channel gate enters the next opening stage from the previous opening stage; In each opening stage of the main canal gate, the opening degree of the main canal gate gradually increases, and the increase value of the opening degree of the main canal gate in the next opening stage is less than the increase value of the opening degree of the main canal gate in the previous opening stage; A main channel desilting mechanism is provided at the bottom of the main channel gate, and the main channel desilting mechanism can desilt part of the drainage main channel on both sides of the main channel gate in the first opening stage of the main channel gate; The bottom of the branch channel gate is provided with a branch channel desilting mechanism, and the branch channel desilting mechanism can desilt part of the diversion branch channels on both sides of the branch channel gate during the opening process of the corresponding branch channel gate.

2. A diversion irrigation gate according to claim 1, characterized in that: The width of the main channel gate from bottom to top is consistent, and the water runoff volume of the next opening stage of the main channel gate is greater than the water runoff volume of the previous opening stage of the main channel gate; In each opening stage of the main channel gate, as the opening degree of the corresponding branch channel gate increases, the opening degree of the main channel gate also gradually increases; The main channel gate also includes several closing stages. Each time a branch channel gate is closed, the main channel gate enters the next closing stage from the previous closing stage.

3. A diversion irrigation gate according to claim 1, characterized in that: The drainage main channel is provided with a main channel receiving groove at the bottom end of the main channel gate, a main channel sealing plate is provided at the center of the top end of the main channel receiving groove, and a main channel sealing groove is provided at the top end of the main channel sealing plate; The main channel desilting mechanism is arranged inside the main channel containing tank, and main channel desilting openings are respectively arranged at the top of the main channel containing tank and on both sides of the main channel sealing plate.

4. A diversion irrigation gate according to claim 3, characterized in that: The main channel gate comprises a main channel gate frame, a main channel sealing plate and a main channel closing mechanism, wherein the main channel sealing plate is movably installed inside the main channel gate frame, and the main channel closing mechanism is arranged at the top of the main channel gate frame; The main channel closing mechanism includes a main channel closing connecting rod and a main channel closing motor. Power is transmitted between the main channel closing motor and the main channel closing connecting rod. Main channel closing sprockets are respectively provided at both ends of the main channel closing connecting rod. Main channel driving chains are respectively provided at both ends of the main channel sealing plate on one side close to the main channel closing mechanism. One of the main channel driving chains is meshed with one of the main channel closing sprockets.

5. A diversion irrigation gate according to claim 4, characterized in that: The main channel desilting mechanism comprises two main channel opening sealing plates, one side of each main channel opening sealing plate is provided with a main channel installation shaft, the other side of each main channel opening sealing plate is provided with a main channel rubber sealing strip, and one side of each main channel installation shaft is provided with a main channel sealing plate driving gear; Two main channel driving racks are arranged on one side of the main channel sealing plate and inside the main channel gate frame. The main channel driving racks can extend from inside the main channel gate frame into the main channel receiving tank.

6. A diversion irrigation gate according to claim 5, characterized in that: In the first opening stage of the main channel gate, the main channel desilting mechanism can be separated from the main channel sealing groove, and the two main channel driving racks are respectively meshed with the two main channel sealing plate driving gears, driving the two main channel opening sealing plates to rotate toward each other, opening the two main channel desilting openings, and the water flow inside the drainage main channel can pass through the main channel receiving groove and the main channel gate, and the silt accumulated in the main channel gate can be flushed away under the drop provided by the main channel receiving groove; During the closing process of the main channel gate, the main channel gate can gradually extend into the main channel sealing groove, and the main channel desilting mechanism can gradually close the two main channel desilting openings respectively.

7. A diversion irrigation gate according to claim 1, characterized in that: The branch channel is provided with a branch channel receiving groove at the bottom end of the branch channel gate, a branch channel sealing plate is provided at the center of the top end of the branch channel receiving groove, and a branch channel sealing groove is provided at the top end of the branch channel sealing plate; The branch channel desilting mechanism is arranged inside the branch channel receiving tank, and branch channel desilting openings are respectively arranged at the top of the branch channel receiving tank and on both sides of the branch channel sealing plate; The branch channel gate comprises a branch channel gate frame, a branch channel sealing plate and a branch channel closing mechanism. The branch channel sealing plate is movably installed inside the branch channel gate frame, and the branch channel closing mechanism is arranged at the top of the branch channel gate frame.

8. A diversion irrigation gate according to claim 7, characterized in that: The branch channel closing mechanism comprises a branch channel closing connecting rod and a branch channel closing motor, power transmission is performed between the branch channel closing motor and the branch channel closing connecting rod, branch channel closing sprockets are respectively arranged at both ends of the branch channel closing connecting rod, branch channel driving chains are respectively arranged at both ends of a side of the branch channel sealing plate close to the branch channel closing mechanism, and one of the branch channel driving chains is respectively meshed with one of the branch channel closing sprockets; The branch channel dredging mechanism comprises two branch channel opening sealing plates, one side of each branch channel opening sealing plate is provided with a branch channel mounting shaft, the other side of each branch channel opening sealing plate is provided with a branch channel rubber sealing strip, and one side of the branch channel mounting shaft is provided with a branch channel sealing plate driving gear.

9. A diversion irrigation gate according to claim 8, characterized in that: During the closing process of the branch channel gate, the branch channel gate can gradually extend into the branch channel sealing plate, and the branch channel desilting mechanism can gradually close the two branch channel desilting openings respectively; Two branch channel driving racks are arranged on one side of the branch channel sealing plate and inside the branch channel gate frame, and the branch channel driving racks can extend from the inside of the branch channel gate frame into the inside of the branch channel receiving groove, and the two branch channel driving racks are respectively meshed with the two branch channel sealing plate driving gears; During the gradual opening process of the branch channel gate, the branch channel dredging mechanism can detach from the branch channel sealing groove, and the two branch channel opening sealing plates gradually rotate toward each other, gradually opening the two branch channel dredging openings, and the water flow inside the diversion branch channel can pass through the branch channel containing groove and the branch channel gate, and flush away the silt accumulated in the branch channel gate under the drop provided by the branch channel containing groove.

10. A method for irrigation of farmland ridges, characterized in that: A diversion irrigation gate as claimed in any one of claims 1 to 9 is used, comprising the following steps: Connect the main drainage channel with the irrigation channel of the farmland, and connect each branch channel with each ridge of the farmland; Open the gates of each branch canal corresponding to the ridge to be irrigated. Each time a gate of a branch canal is opened, the gate of the main canal enters the next opening stage from the previous opening stage. When the gates of each branch channel are opened, the branch channel desilting mechanism will desilt some of the diversion branches on both sides of the branch channel gates; When the first branch canal gate is opened, the main canal gate is in the first opening stage, and the main canal dredging mechanism dredges part of the drainage main canal on both sides of the main canal gate.

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