Self-pressure-balanced all-welded ball valve

一种自压力平衡式全焊接球阀

Abstract

本实用新型公开了一种自压力平衡式全焊接球阀,包括阀体、阀盖、球体、上阀杆和下阀杆,球体安装在阀体内腔,阀体内设置有流体通道,球体上设置有通孔,球体的通孔的两端位置与流体通道内壁面之间均设置有密封装置,所述密封装置包括阀座和固定安装在阀座上的密封件,阀体的内腔内壁面靠近球体位置设置有凸环,凸环靠近球体端设置有阀座安装槽,阀座背离密封件端开设有弹簧槽,弹簧槽内侧设置有调节槽,调节槽内穿设有滑块,滑块上套接有复位弹簧,调节槽内端与流体通道之间设置有调节通孔,滑块内端至少设置有一个第一环形密封槽,第一环形密封槽内套接有第一密封圈。上述技术方案,阀门结构设计合理、密封性能好,使用寿命长,制作成本低。
The utility model discloses a self-pressure-balanced all-welded ball valve which comprises a valve body, a valve deck, a ball, an upper valve rod and a lower valve rod. The ball is mounted in an inner cavity of the valve body. A fluid channel is arranged in the valve body. The ball is provided with a through hole. Sealing devices are arranged between the two ends of the through hole of the ball and the inner wall face of the fluid channel respectively. Each sealing device comprises a valve seat and a sealing element which is fixedly mounted on the valve seat. The position, close to the ball, of the inner wall face of the inner cavity of the valve body is provided with a bulge loop. The end, close to the ball, of the bulge loop is provided with a valve seat mounting groove. The end, deviating from the sealing element, of each valve seat is provided with a spring groove. A regulating groove is formed in the inner side of each spring groove. A sliding block penetrates through each regulating groove and is sleeved with a reset spring. A regulating through hole is formed between the inner end of each regulating groove and the fluid channel. The inner end of each sliding block is provided with at least one first annular sealing groove, and a first sealing ring is connected into the first annular sealing groove in a sleeved mode. By means of the technical scheme, the self-pressure-balanced all-welded ball valve is reasonable in structural design, good in sealing performance, long in service life and low in manufacturing cost.

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