Single-circulation flow diversion plate type double water cooling butterfly valve

Abstract

The invention discloses a single-circulation flow diversion plate type double water cooling butterfly valve. The single-circulation flow diversion plate type double water cooling butterfly valve comprises a valve body, a valve plate arranged in the valve body, an upper valve rod and a lower valve rod, wherein the upper valve rod and the lower valve rod are arranged on the valve plate; the valve body is a welded valve body, an inner cavity of the valve body is internally provided with a jacket which is fixed to the inner wall of the valve body, and a first cooling circulation system is formed by a cavity between the jacket and the valve body; and the valve body is provided with two water inlet and outlet openings, and a baffle which is used for separating the two water inlet and outlet openings to enable the first cooling circulation system to form a single circulation cooling path is arranged between the two water outlet and inlet openings. By adopting the integrally welded valve body,the situation that a whole flange in split-type connection is a leaking point can be completely avoided, and it is guaranteed that no leakage exists in the valve body; and due to the fact that the valve body is internally provided with the first cooling circulation system, the valve plate is internally provided with a second cooling circulation system, the two water cooling circulation paths independently exist and do not interfere with each other, the cooling functions can coordinate with each other and complement each other, the valve carries out heat exchanging rapidly when a high-temperature medium passes through, and the rapid cooling effect is achieved.

Description

technical field [0001] The invention relates to a double-water-cooled butterfly valve of single-circulation guide plate type. Background technique [0002] Most of the water-cooled butterfly valves are cooled by water passing through the valve plate and the inner cavity of the valve, and the structure is roughly the same. In order to facilitate maintenance, the valve body mostly adopts a split structure. The valve is a pressure vessel, and its safety must be considered first, especially the particularity of the high-temperature medium. The safety during use should be the most important technical index. The two-half split structure of the valve body adopts flange connection, and the circumference of the flange connection is the leakage point. Since the water-cooled butterfly valve is mostly used in the working conditions where the medium temperature is above 700°C, it is easy to cause leakage of the valve, and there is a big problem. Security risks. In addition, due to the ...

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Problems solved by technology

[0003] In addition, some water-cooled butterfly valves are currently on the market for working conditions such as high-temperature flue gas in the petrochemical industry. It is easy to disassemble, but due to the particularity of the working conditions, the temperature of the medium is mostly above 700°C, and there are leaks on the entire circumference of the connection between the two flanges. The material will be more or less deformed due to long-term work at high temperature, so it is easy cause the valve to leak

In addition, the water cooling device of the valve plate and the valve body is a simple cavity without an ideal flow guide structure. The cooling water enters directly from the valve body or the water inlet pipe of the valve plate, and then flows out directly from the other direction, which cannot be well cooled. Control the circulation path of cooling water inside the valve plate, some parts of the inner cavity of the valve will not be able to circulate effectively due to cooling water, resulting in uneven heat transfer between parts of the inner cavity of the valve plate, and the heat exchange between the cooling water and the high-temperature medium is not large. Affect the heat transfer effect

The valve plate is more likely to be deformed due to uneven heating, which has certain limitations in use

Seriously affect the use effect and valve life

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