Metal hard-sealing ball valve

Abstract

The invention provides a metal hard-sealing ball valve used for increasing the gas dissolving efficiency of liquid with high flow rate. The metal hard-sealing ball valve comprises a valve body, a liquid inlet valve cover, a liquid outlet valve cover, a valve ball, a rotating mechanism and a driving device. The liquid inlet valve cover and the liquid outlet valve cover are respectively provided with flowing channels, the flowing channels are arranged at the two sides of the valve body, the valve ball is provided with an internal channel, the internal channel is arranged in the valve body, the rotating mechanism used for leading the valve ball to rotate is connected with the valve ball, and the driving device is used for driving the rotating mechanism to act. The metal hard-sealing ball valve is characterized in that: the metal hard-sealing ball valve further comprises an impeller mechanism, the impeller mechanism which is arranged in the internal channel of the valve ball comprises a pitch-changing spiral impeller, and the screw pitch of the pitch-changing spiral impeller is increased from the liquid inlet valve cover to the liquid outlet valve cover.

Description

technical field [0001] The invention relates to a ball valve, in particular to a metal hard-sealed ball valve which needs to improve the efficiency of gas dissolution, which is used for aeration of beverages, mixing and stirring of dissolved medicines and the like. Background technique [0002] At present, metal hard-sealed ball valves have been widely used in liquid or gas pipeline systems, and their main function is to conduct or cut off the flow of liquid or gas. The existing metal hard-sealed ball valve is usually composed of valve body, liquid inlet valve cover, liquid outlet valve cover, valve ball, valve seat, valve stem, rotating mechanism and driving device. For the liquid inlet valve cover and the liquid outlet valve cover with flow channels, the direction of the liquid passing through the ball valve does not need to be distinguished in general, that is, the liquid inlet valve cover and the liquid outlet valve cover can only be divided into left and right valve cov...

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Problems solved by technology

[0003] In existing industrial production, liquids with high gas solubility are sometimes required. For example, in the food industry, in order to produce oxygen-enriched water beverages, it is necessary to add oxygen gas to pure water to produce the health water that drinkers need, and In the industrial fermentation process, it is often necessary to provide a liquid with a higher oxygen concentration; however, the solubility of oxygen in water is very low. Generally, at 20 degrees Celsius, the solubility of oxygen in water under a standard atmospheric pressure is 9.2mg / L, so if you want To form high-solubility oxygen-enriched water, pressurized equipment is required; for industrial fermentation, a larger amount of oxygen-containing liquid is required, so that the entire fermentation equipment occupies a large area and the input cost is high

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