Automatic adjusting gate for irrigation canal
By designing a pure mechanical irrigation canal automatic adjustment gate, the combination of gate panels, support arms, floating boxes and counterbalance floating counterweights is solved, and the water volume adjustment of traditional irrigation canals is simple to operate and maintain, low cost and efficient water volume adjustment is achieved.
Patent Information
- Application Number
- CN202421362570.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-14
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2034-06-14
AI Technical Summary
The water volume regulation of existing irrigation canals relies on manual monitoring and manual operation, which has problems such as slow response speed, low regulation accuracy, large human resources consumption, and difficulty in operating under severe weather conditions. The automated gate control system is expensive to implement in remote areas or places with unstable power supply and difficult to maintain.
An automatic adjustment gate for irrigation canal is designed, using pure mechanical devices, through the combination of gate panel, support arm, floating box, counterbalance floating counterweight and rotating shaft, automatic adjustment of opening degree is achieved, reducing dependence on external energy and complex electronic equipment.
It achieves simple operation and maintenance, low cost, and is not prone to electrical failures, improves operation and maintenance efficiency and saves costs, and is suitable for irrigation canals with flows less than 300m³/S.
Smart Images
Figure CN222685441U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of valves, and particularly relates to an automatic regulating gate for an irrigation channel. Background Art
[0002] In current irrigation management systems, especially in areas that rely on seasonal rivers and limited water resources, traditional water regulation methods usually rely on manual monitoring and manual operation of gates on irrigation canals. This method has significant limitations, including slow response speed, low regulation accuracy, high human resource consumption, and difficulty in operation at night or in bad weather conditions. These factors not only affect irrigation efficiency, but may also lead to a great waste of water resources and uneven water supply in the irrigation area, which in turn affects the growth and yield of crops.
[0003] In recent years, with the development of Internet of Things technology, automated control technology and hydrology, automated irrigation management systems have begun to emerge, aiming to solve the above problems. However, some existing automated gate control systems often rely on external power supplies and complex sensor networks, which are costly to implement and difficult to maintain in remote areas or places with unstable power supply.
[0004] In view of this, there is an urgent need for an automatic regulating gate for irrigation canals that is highly adaptable and easy to maintain. The system should be able to make full use of natural forces and reduce dependence on external energy and complex electronic equipment. Summary of the invention
[0005] The technical problem to be solved by the utility model is to provide an automatic regulating gate for an irrigation channel. The utility model has a simple structure and is easy to operate and maintain. In addition, a purely mechanical device is used, and electrical failures will not occur, thus solving the problem of energy shortage and achieving the effect of improving operation and maintenance efficiency and saving costs.
[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is:
[0007] An automatic regulating gate for an irrigation canal comprises a gate panel, which is connected to a floating box, a counterbalancing floating weight and a shaft sleeve through a support arm. The shaft sleeve cooperates with a rotating shaft, and the floating box and the gate panel are respectively located on both sides of the rotating shaft.
[0008] Alternatively, the gate panel is connected to the floating box, the counter-floating weight and the rotating shaft through the supporting arm, and the floating box and the gate panel are respectively located on both sides of the rotating shaft.
[0009] Preferably, the counterbalancing floating weight is located above the rotation axis.
[0010] Preferably, the gate panel is a curved gate panel.
[0011] Preferably, the center of curvature of the arc door panel coincides with the axis of the rotation axis, and the elevation of the counterbalancing floating weight is the same as the elevation of the upstream regulating water level.
[0012] Preferably, water seals are provided on both sides of the gate panel.
[0013] Preferably, the weight of the gate panel and the buoyancy of the float box are balanced with the weight of the counter-balancing floating weight.
[0014] The utility model can achieve the following beneficial effects:
[0015] The utility model has a simple structure, convenient operation and maintenance, light weight, convenient installation and disassembly, a design weight of 2.5T, suitable for flow rates less than 300m³ / S, simple structure and long service life; the utility model is a purely mechanical device, will not have electrical failures, solves the problem of energy shortage, and achieves the effect of improving operation and maintenance efficiency and saving costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments:
[0017] Figure 1 It is a three-dimensional structural diagram of the utility model;
[0018] Figure 2 This is the force analysis diagram of the utility model.
[0019] In the figure: arc door panel 1, support arm 2, floating box 3, counterbalancing floating counterweight 4, and rotating shaft 5. DETAILED DESCRIPTION
[0020] The preferred solution is Figure 1 to Figure 2 As shown, an automatic regulating gate for an irrigation canal includes a gate panel, which is connected to a floating box 3, a counter-balancing floating weight 4 and a shaft sleeve through a support arm 2, the shaft sleeve cooperates with a rotating shaft 5, and the floating box 3 and the gate panel are respectively located on both sides of the rotating shaft 5. Alternatively, the gate panel is connected to a floating box 3, a counter-balancing floating weight 4 and a rotating shaft 5 through a support arm 2, and the floating box 3 and the gate panel are respectively located on both sides of the rotating shaft 5.
[0021] Specifically, the counterbalancing floating weight 4 is located above the rotating shaft 5. The gate panel is an arc gate panel 1. The design conditions of the utility model meet the following points:
[0022] 1. The rotation axis coincides with the center of curvature of the arc door panel, and the counterbalancing floating weight must be at the same elevation as the upstream regulating water level;
[0023] 2. The center of gravity of the gate must be located on a plane perpendicular to the lower end surface of the gate. The forces acting on the gate are: ① the gate's own weight (including counterweight); ② the water thrust acting on the blades and buoyant submerged parts; ③ the bearing transmission force.
[0024] To balance the gate, the moments produced by these forces must be kept zero relative to the axis of rotation. Balance depends only on the moments due to the weight of the gate and the thrust against the lower surface of the counterweight. The upstream water level is controlled as follows:
[0025] 1. If the upstream water level is at the elevation of the gate trunnion, the gate remains stationary at any position; the opening of the water outlet depends on the flow rate and the water level difference between the upstream and downstream water levels, that is, the greater the water level difference, the greater the opening, the greater the flow, and the smaller the hydraulic loss;
[0026] 2. When the inflow rate increases slightly or the downstream demand decreases, the upstream water level is higher than the set water level, and the buoyancy on the float increases and the moment exceeds the weight of the arc gate, causing the arc gate to open until the upstream horizontal plane coincides with the gate trunnion elevation;
[0027] 3. On the contrary, that is, the inflow rate decreases, the inflow rate increases, the downstream demand is large, and the upstream level decreases; this leads to an upward thrust on the counterbalancing floating weight and the arc gate closes until the upstream level is at the height of the trunnion. When the gate is open, the friction is limited to the friction of the bearing. On the other hand, in the closed position, the edge of the arc gate panel can be close to the walls on both sides of the irrigation channel (similar to a rubber water seal) and the gate at the opening requires an additional force, which is achieved by a 'starting float' to minimize oscillation when starting to open the gate, because these gates are very sensitive to the influence of wind and shake.
[0028] Working principle: The moment caused by the weight and buoyancy of the gate is balanced by the counterweight. If the downstream demand decreases, the gate will close. If the demand increases, the gate opens, always keeping the downstream water level consistent with the rotation axis elevation. Due to its simple operation and maintenance and light weight. The gate is closed by gravity.
[0029] Embodiment 1:
[0030] The various structural parts of this valve are rigidly connected, horizontal in the waterless state, and the bottom opening is at the same elevation as the counterweight block. This utility model is used in the Kaidaji Hydropower Station project, which includes the construction of a local main agricultural irrigation canal, in which the irrigation canal has a water volume regulating gate. The water volume demand downstream of the irrigation canal needs to be constantly adjusted, so a purely mechanical irrigation canal automatic regulating gate was invented. The principle is as follows:
[0031] (1) The arm connects the gate and the counterweight;
[0032] (2) The gate opening is automatically adjusted under the action of the gate's own buoyancy, water flow impact, and counterweight;
[0033] (3) If the upstream water level is at the elevation of the gate trunnion, the gate remains stationary at any position; the degree of water outlet opening depends on the flow rate and the water level difference between the upstream and downstream water levels. That is, the greater the water level difference, the greater the opening, the greater the flow rate, and the smaller the hydraulic loss;
[0034] (4) In the event of a slight increase in inflow or a decrease in downstream demand, the upstream water level is higher than the set water level, the buoyancy on the float increases and the moment exceeds the weight of the arc gate, causing the arc gate to open until the upstream horizontal plane coincides with the gate trunnion elevation.
[0035] As the inlet flow decreases, the inlet flow needs to increase, the downstream demand increases, and the upstream level decreases; this causes an upward thrust on the counterbalancing floating weight and the arc gate closes until the upstream level is at the height of the trunnion.
[0036] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limitations of the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.
Claims
1. An automatic regulating gate for an irrigation canal, comprising a gate panel, characterized in that: The gate panel is connected to the floating box (3), the counter-balancing floating weight (4) and the shaft sleeve through the support arm (2); the shaft sleeve cooperates with the rotating shaft (5); the floating box (3) and the gate panel are respectively located on both sides of the rotating shaft (5); Alternatively, the gate panel is connected to the floating box (3), the counter-floating weight (4) and the rotating shaft (5) through the supporting arm (2), and the floating box (3) and the gate panel are respectively located on both sides of the rotating shaft (5).
2. The automatic regulating gate for irrigation canals according to claim 1, characterized in that: The counterbalancing floating weight (4) is located above the rotating shaft (5).
3. The automatic regulating gate for irrigation canals according to claim 1, characterized in that: The gate panel is an arc gate panel (1).
4. The automatic regulating gate for irrigation canals according to claim 3, characterized in that: The center of curvature of the arc door panel (1) coincides with the axis of the rotation axis, and the elevation of the counterbalancing floating weight (4) is the same as the elevation of the upstream regulating water level.
5. The automatic regulating gate for irrigation canals according to claim 1, characterized in that: There are water seals on both sides of the gate panel.
6. The automatic regulating gate for irrigation canals according to claim 1, characterized in that: The weight of the gate panel and the buoyancy of the floating box (3) are balanced by the weight of the counter-floating weight (4).