Damping sand discharge flap gate based on hydraulic self-control
By designing a damped sand-discharging flap gate, adopting a structure that combines a flap gate with a weir, and using a rotary damper to control the opening and closing of the gate, the problems of water level rise and gate vibration caused by siltation were solved, achieving stable operation and effective water discharge.
Patent Information
- Application Number
- CN202423088341.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-14
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2034-12-14
AI Technical Summary
When existing hydraulically controlled flap gates are in operation in mountainous rivers, siltation causes the water level in front of the gate to rise, affecting the normal opening and discharge capacity of the gate, and there is also a risk of gate vibration and damage.
A damped sand-discharging flap gate was designed, which uses a flap gate in conjunction with a weir. The opening and closing of the gate is controlled by a rotating damper to ensure smooth flapping when the water level changes, avoid vibration, and allow sediment to be discharged smoothly at low water levels.
This technology enables the gate to rotate smoothly during water level changes, avoiding gate vibration and damage, ensuring the effective discharge of silt and debris, and improving the gate's operational reliability and drainage capacity.
Smart Images
Figure CN223867190U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of hydraulic engineering, and concretely is a damper sand releasing flap gate based on hydraulic automatic control. BACKGROUND
[0002] The hydraulic automatic control flap gate is a common gate in China, has the functions of water storage and flood discharge, and operates under the action of the water pressure of the upstream and downstream and its own weight, opens to discharge water when the water level in front of the gate rises to the design height, and automatically closes to block water when the water level in front of the gate drops to a certain position. The hydraulic automatic control flap gate has simple structure, low investment in maintenance and energy dissipation, high operation reliability, large discharge capacity and low water back-up. Based on the above advantages, the flap gate is widely used in various small and medium-sized hydraulic engineering such as spillway, hydropower station and landscape engineering. Especially in the mountainous area where the flood comes suddenly and the operation is inconvenient, the advantages of the flap gate are more prominent compared with the rubber dam and gravity dam of the same scale, and the flap gate has wide application prospect.
[0003] The slope of the river in the mountainous area is large, the water flow speed is fast, the flood flow is large, and a large amount of sediment and floating objects are carried. The task of the gate dam engineering running in the mountainous river during the large flow is not only to discharge flood, but also to discharge the sediment carried by the flood and the sediment accumulated in front of the gate during the small flow to the downstream and further river. After the hydraulic automatic control flap gate is opened and operates, the water flows through the gate at the same time, which is beneficial to the discharge of the floating objects and the bed load sediment.
[0004] The common hydraulic automatic control flap gate is suitable for application in the mountainous river, but when the gate operates in the mountainous river, some engineering problems still exist, for example, the gate is in the water blocking state before being opened, so that the water level in front of the gate is raised, the flow speed of the sediment-containing water is reduced under the block of the gate, the sediment carrying capacity is reduced, and thus the sediment is deposited at the bottom in front of the gate. The sediment accumulation will have harmful effects on the flap gate. TECHNICAL CONTENT
[0005] The utility model discloses a damper sand releasing flap gate based on hydraulic automatic control to overcome the defects in the prior art.
[0006] The utility model provides the following technical scheme:
[0007] A damper sand releasing flap gate based on hydraulic automatic control, characterized in that it comprises a groove-shaped main body, a check dam extending upward at one end of the main body, a flip gate plate arranged on the inner wall of the main body, the flip gate plate and the check dam are correspondingly matched, and the flip gate plate, the check dam and the main body form a water injection area.
[0008] On the basis of the above technical scheme, the following further technical scheme can also be provided:
[0009] The flip gate is L-shaped, which includes a longer section and a shorter end, and one end of the shorter end is correspondingly matched with the weir.
[0010] An arc surface is arranged on the inner side wall of the weir and correspondingly matched with the flip gate.
[0011] A rotation damper is arranged on the rotation shaft of the flip gate.
[0012] The utility model has the advantages of simple structure and convenient use.
[0013] The damper sand flip gate adopts the water power self-control mode to release water, and no matter the water level slowly rises or suddenly increases, the gate can be smoothly flipped stably and without vibration, so that the gate avoids sudden overturning, frequent swinging and beating, reduces the overall vibration of the engineering structure, and avoids the gate damage; meanwhile, the silt, waterweeds and other sundries under the low water level and low flow rate are discharged under various external forces. BRIEF DESCRIPTION OF DRAWINGS
[0014] Figure 1 It is the structural schematic diagram of the utility model. DETAILED DESCRIPTION
[0015] As Figure 1 shown in the figure, a damper sand flip gate based on water power self-control, which includes a groove-shaped main body 1, and a supporting leg 1a is arranged at the bottom of the main body 1. The weir 2 is arranged on the end of the main body 1 and extends upwards along the length direction.
[0016] The flip gate 3 is rotatably connected to the inside of the main body 1 at one side of the weir 2. The flip gate 3 is L-shaped, which includes a longer section a and a shorter end b. The rotation damper 5 is arranged on the rotation shaft of the flip gate 3. The opening degree of the flip gate 3 controlled by the rotation damper 5 should not be more than 16-18 degrees, so as to ensure the relative stability of the water flow and meet the requirement that no funnel type suction vortex appears in front of the water inlet and no negative pressure is generated in the waterway.
[0017] One end of the shorter end b is correspondingly matched with the weir 2 in water-tightness. The arc surface 2a is arranged on the inner side wall of the weir 2 and correspondingly matched with the flip gate 3, so that the shorter end b can still be correspondingly matched with the weir 2 in water-tightness when rotating.
[0018] The flip gate 3, the weir 2 and the main body 1 form the water injection area 4.
[0019] Device running experiment:
[0020] The main body is placed in the water tank 4, and the water inlet pipe 6 is inserted in the water injection area 4. The corresponding matched water pump 6a is connected to the water inlet pipe 6 outside the main body 1. The simulated water is sent to the water injection area 4 by the water pump 6a. As the water level in the water injection area 4, that is, the longer section a of the turnover gate 3, rises (the water level on the front side of the gate), when the water pressure torque on the rotation fulcrum is greater than the torque of the gate weight and friction on the rotation fulcrum (the rotating shaft), the turnover gate automatically opens to a certain inclination angle until the water pressure torque on the rotation fulcrum is equal to the torque of the turnover gate weight on the rotation fulcrum at this flow rate, reaching a new balance at this flow rate.
[0021] When the upstream flow rate decreases to a certain extent, the torque of the turnover gate weight on the rotation fulcrum is greater than the torque of the water pressure and friction on the fulcrum, and the hydraulic self-control flap gate can be automatically closed to a certain inclination angle, reaching a new balance at this flow rate. When silt and debris accumulate on the turnover gate 3, it will affect the normal flow area. At this time, under the action of gravity, water pressure and other forces, the damper of the rotating shaft rotates by a certain angle, and the accumulated material flows out from the gap between the leaves.
[0022] Experimental data:
[0023]
[0024] In order to eliminate the influence of water flow fluctuation on the experiment, the water pump is opened to the minimum during the experiment, and a water-blocking glass plate is arranged at the inlet of the water inlet of the water pump to ensure that the experimental water has a constant hydrostatic pressure; The model flow is determined according to the design flow of the water pump. The design flow of the model is 6000L / h, and the maximum experimental flow is equal to 1.1 times the design flow.
[0025] Through repeated tests, it is found that when the gate discharges flood, whether the upstream water flow gradually increases and the water level gradually rises, or the flow suddenly increases and the water level rapidly rises, the gate can smoothly and smoothly turn over without vibration. The opening and closing of the gate is only related to the water level. When the water level reaches the design water level, the gate is subjected to the torque of the water pressure in the direction of the flow on the rotating shaft, which is equal to the torque of the water pressure on the rotating shaft in the opposite direction. At this time, the gate is in a balanced state, but due to the impact of the water flow, the torque in the direction of the flow is slightly larger, so that the gate turns over, the water flows through, the water level drops, and the gate closes. The gate is kept at a small rotation angle.
Claims
1. A hydraulically self-controlled damping sand-discharging flap gate, characterized in that: It includes a trough-shaped main body (1), and a weir (2) extending upward from one end of the main body (1). A flip gate (3) is provided on the inner wall of the main body (1). The flip gate (3) and the weir (2) are correspondingly matched. A water injection zone (4) is formed between the flip gate (3), the weir (2) and the main body (1). The flip gate (3) is L-shaped and includes a longer section and a shorter end. One end of the shorter end is correspondingly matched with the weir (2). An arc surface (2a) corresponding to the flip gate (3) is provided on the inner side wall of the weir (2).
2. The hydraulically controlled damping sand-discharging flap gate according to claim 1, characterized in that: A rotation damper (5) is provided on the rotating shaft of the flip gate (3).