Large-sized hydraulic speed change floating box flap valve

Abstract

The invention discloses a large-sized hydraulic speed change floating box flap valve. The flap valve comprises a hinged support (1), a valve seat (3), an upper valve leaf (5) and a lower valve leaf (8), wherein both the valve seat (3) and the hinged support (1) are fixed on a pump station base; the upper valve leaf (5) is hinged with the hinged support (1) through a pin shaft (2); the lower valveleaf (8) is hinged with the upper valve leaf (5); the upper valve leaf (5) and the lower valve leaf (8) are hermetically contacted and matched with the valve seat (3) through a sealing structure, andthe upper valve leaf (5) is connected with the lower valve leaf (8) through at least one hydraulic mechanism (7); and one end of the hydraulic mechanism (7) is hinged with the upper valve leaf (5), and the other end of the hydraulic mechanism (7) is hinged with the lower valve leaf (8). After the structure is adopted, since the upper valve leaf and the lower valve leaf are provided with the hydraulic mechanism, the collision force of the valve leaves and the valve seat can be buffered by the hydraulic mechanism; thus water sealing rubber for sealing the valve leaves and the valve seat is prevented from being damaged so as to reduce the cost; meanwhile, the noise produced during collision is also reduced.

Description

technical field [0001] The invention relates to ancillary equipment of a drainage and irrigation pumping station, in particular to a large-scale hydraulic speed-variable buoyant flap valve which is used for shutting down the water pump of the drainage and irrigation pumping station. Background technique [0002] The irrigation and drainage pumping station is a complex of pumping devices, water inlet and outlet buildings, pump rooms and ancillary facilities for irrigation and drainage. The flap door is one of the important components in the drainage and irrigation pumping station. It is an accessory device used for shutting down the water pump in the drainage and irrigation pumping station. Its main function is to prevent the backflow of external river water. At present, commonly used flap doors include cast iron flap doors with hanging counterweights, pontoon flap doors and free-side flap doors, and the most commonly used ones are pontoon flap doors. Usually the floating bo...

AI Technical Summary

Problems solved by technology

[0004] 1) For a large floating box flap door, as the size gradually increases, the weight of the door leaf also gradually increases. Therefore, when the flap door is closed, that is, the door leaf is closed, the impact force between the door leaf and the door seat also increases. In this way, the damage to the water-sealing rubber used to seal the door leaf and the door seat is also very serious, resulting in frequent replacement of the water-sealing rubber, which increases the cost accordingly; There is a lot of noise, which affects the working environment of the pumping station

[0005] 2) The sealing structure of the door leaf and the door seat in the prior art is usually welded on the door seat with two upper and lower fixing plates of the same size, and a through hole is punched on the fixing plate. Put the water-sealing rubber between the two fixing plates, and then tighten the bolts and nuts through the through holes on the fixing plate, and there are multiple sealing structures on both sides of the door seat. In other words, many through holes need to be drilled. Therefore, the assembly process of this structure is very troublesome; meanwhile, the compression of the water-sealing rubber in this structure is small. Sealing requirements between door seats

[0006] 3) In the prior art, a round hole is usually provided at the hinge joint between the upper door leaf and the hinge seat, and the upper door leaf is hinged in the round hole through a pin shaft. This structure usually limits the hinge point of the upper door leaf to a certain position. One point cannot be moved, and the entire door leaf has a length dimension, and as the size of the door leaf becomes larger and larger, the sealing effect between the door leaf and the door seat near the hinge is good, but the door leaf far away from the hinge The sealing effect with the door seat is very poor, which will lead to leakage

[0007] 4) The ratio between the upper and lower door leaves of the door leaf in the prior art is usually that the upper door leaf is large and the lower door leaf is small. In this case, when the river flow is not too large, the lower door leaf is opened first, and when the flow increases Open the upper door page from time to time; however, when the lower door page is small, usually the lower door page cannot meet the traffic demand at all, and it is always necessary to open the upper door page again; in this way, the energy consumption is large, which is not conducive to energy saving

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