Small-hole-opening extra-high-water-head integral-casting plane operating gate with fixed wheel

Abstract

The invention discloses a small-hole-opening extra-high-water-head integral-casting plane operating gate with a fixed wheel. The gate comprises a casting gate body (10), a top side water seal mountingseat (12) is arranged on the upstream surface of the casting gate body, the cross section of the top side water seal mounting seat is in a rectangle shape provided with a groove (13), a top side water seal assembly (30) is mounted in the groove, the top side water seal assembly comprises a top side water seal (31), the shape of the cross section of the top side water seal is similar to the shapeof the Chinese character "shan", a pair of parallel hollow cavities (34) are formed in the bottom of the Chinese character "shan" shape, and the hollow cavities communicate with the inner side of thetop side water seal mounting seat through a communication hole (14) in the bottom of the groove. According to the gate, the top side water seal adopts a pressurized water seal which is in the shape ofthe Chinese character "shan", the communication hole is formed in the inner side of an approximately-concave convex body so that the top side water seal can communicate with an upstream water body, the water seal which is in the shape of the Chinese character "shan" extends to the upstream side through the water pressure to be in close contact with a water stop seat plate of the top side water seal, wherein the higher the water head, the closer the contact is, so that the water stopping effect of the gate under the extra-high water head is effectively guaranteed.

Description

technical field [0001] The invention relates to an integrally cast plane fixed-wheel working gate with a small orifice and extra-high water head, belonging to the technical field of metal structures of water conservancy and hydropower projects. Background technique [0002] At present, arc-shaped gates are generally used for vent holes or bottom-hole working gates in hydropower or water conservancy projects. The reason is that arc gates have no gate slots, good discharge flow, and good vibration resistance; Higher projects, because the arc gate hinges are vulnerable to water flow impact, do not use the safe operation of arc gates, it is not suitable to arrange arc gates, and planar gates are used instead. The size is small, the water pressure is high, the thickness of the steel plate will be thicker, the traditional welding gate structure is adopted, the welding space is narrow, the workers are difficult to operate, the welding quality is difficult to guarantee, and the manu...

AI Technical Summary

Problems solved by technology

[0002] At present, arc-shaped gates are generally used for vent holes or bottom-hole working gates in hydropower or water conservancy projects. The reason is that arc gates have no gate slots, good discharge flow, and good vibration resistance; Higher projects, because the arc gate hinges are vulnerable to water flow impact, do not use the safe operation of arc gates, it is not suitable to arrange arc gates, and planar gates are used instead. The size is small, the water pressure is high, the thickness of the steel plate will be thicker, the traditional welding gate structure is adopted, the welding space is narrow, the workers are difficult to operate, the welding quality is difficult to guarantee, and the manufacturing is difficult; in addition, the conventional P-type water seal pre-compression The amount is large and easy to damage, so there are still deficiencies in the existing technology and need to be further improved

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