Spiral groove type diversion structure and method thereof

Abstract

The invention relates to a spiral groove type diversion structure and method thereof. The spiral groove type diversion structure comprises an intake sump and a water pump; a water suction pipe of thewater pump extends into the intake sump, and the end, arranged at the intake sump, of the water suction pipe is provided with a bell mouth; the intake sump is internally provided with a diversion device which is conical and arranged at the lower part of the bell mouth in the intake sump; the upstream face, sides and downstream face of the diversion device are separately provided with an upstream face groove, side spiral grooves and a downstream face groove; the upstream face groove and the downstream face groove are separately arranged on the upstream face and the downstream face of the diversion device linearly; and the side spiral grooves are arranged on the sides of the diversion device spirally. Through the spiral groove type diversion structure, the spiral groove type diversion deviceis arranged in the intake sump, and can play a role in diversion and rectification; not only can the water flow state into a pump and the flow state near a flare pipe of the intake sump be improved so that a better inflow condition is provided, but also the generation of vortex at the bottom of the intake sump can be eliminated.

Description

technical field [0001] The invention relates to a flow diversion structure with a spiral groove and a method thereof, belonging to the technical fields of water conservancy engineering and municipal engineering. Background technique [0002] Inlet pool is the most common structure in medium and small vertical axial flow pumping stations. The uneven distribution of flow velocity in the inlet pool or the appearance of vortex will not only significantly reduce the energy performance and cavitation performance of the pump, but also may cause the pump unit to vibrate or even fail to work normally. Only with good water inlet conditions can the safe and efficient operation of the pump be guaranteed. In the specific engineering design, in order to obtain better water pump inflow conditions and eliminate the bottom vortex below the bell mouth, diversion cones and cross plates are often added to the bell mouth. [0003] In order to improve the flow state of the water inlet pool, the...

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Problems solved by technology

[0003] In order to improve the flow state of the water inlet pool, there are currently patents related to related measures: Authorized invention patent CN20152013402 Setting a new type of ω rear wall in the closed water inlet pool can effectively solve the problem of dead water area on the back wall of the closed water inlet pool, and can effectively improve the flow rate of the water inlet pool. The bad flow state near the back wall of the pool, but it cannot improve the bad flow state below the bell mouth and the flow state of the water entering the pump

The authorized invention patent CN201610060303 sets a new type of water pump beam in the water inlet pool, which can effectively improve the flow state around the water pump beam, prevent the occurrence of vortex, and improve the efficiency of the pump station. The vortex around the beam is not significantly improved for the flow pattern and vortex belt below the horn tube

The existing patents propose many engineering measures to improve the flow state of the water inlet forebay to improve the water inlet conditions of the water inlet pool, and the bad flow state under the trumpet tube and the flow state of the water flow into the pump are less

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