A multipurpose ball valve

Abstract

The invention relates to a novel multipurpose ball valve which comprises a valve body, a valve rod, a valve element and a valve seat, wherein the valve rod drives the valve element inside the valve body to rotate, the valve element is matched with the valve seat in a sealed mode, the valve seat is made of flexible graphite materials, the valve rod penetrates through the valve element, the valve rod inside the valve element is fixedly provided with a butterfly plate, an annular drive groove is formed in the upper end of the valve element, a matched annular drive disc is installed in the annular drive groove, two independent drive grooves are symmetrically formed between the disc wall of the annular drive disc and the groove wall of the annular drive groove, pin rollers are arranged in the drive grooves, and the valve rod drives the annular drive disc to rotate. The novel multipurpose ball valve overcomes the defects that for a common ball valve in the prior art, a valve seat is rushed to be damaged easily and the common ball valve is not suitable for being used in high-temperature media under the working conditions of large fluid pressure difference and high flow velocity; through the design, the novel multipurpose ball valve not only has the good adjusting function of a butterfly valve, but also has the sealing performance of a closed cycle ball valve, is suitable for being used in the high-temperature media, and has the advantages of being compact in structure, convenient to operate and use, high in reliability and long in service life.

Description

technical field [0001] The invention relates to a novel multipurpose ball valve. Background technique [0002] When the traditional ball valve is used as a regulating valve, the flow characteristics are poor, and when the ball is just opening or closing, the fluid pressure difference is large, the flow rate is high, and the valve seat is easy to be washed out. In actual use, it is often used. A butterfly valve and a closed-circuit valve are used in series to undertake the two functions of fluid flow regulation and closed-circuit sealing respectively, so that the cost is correspondingly increased. At the same time, the valve seat of the above-mentioned ball valve is generally made of special polymer materials, including polytetrafluoroethylene (PTFE-F4), polychlorotrifluoroethylene (PCTFE-F3), polyperfluoroethylene propylene (PFEP-F46), polyamide (N1010), para polyphenylene (PPL) and polyether ether ketone (PEEK), etc. , but the use temperature of the above-mentioned special...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the problem that the seat of the ordinary ball valve in the prior art is easy to be washed out under the condition of large fluid pressure difference and high flow rate, and the valve seat cannot meet the requirements of high-temperature medium use, the present invention provides a new type of multi-purpose ball valve, This multi-purpose ball valve not only has the excellent adjustment function of butterfly valve, but also has the sealing performance of closed-circuit ball valve, and is suitable for high-temperature medium and has strong reliability.

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