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Sluice valve dual stem mechanism

A double-stem and gate valve technology, which is applied in the direction of sliding valves, valve devices, mechanical equipment, etc., can solve the problems of large space occupation, high space occupied by the valve stem lifting mechanism, and limited use, so as to achieve improved service life, stable operation, Avoid the effect of damage

Inactive Publication Date: 2006-03-08
邢毅栋
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AI Technical Summary

Problems solved by technology

[0004] Although the rising stem gate valve has many advantages in use, there are also some disadvantages: due to the large size of the rising stem gate valve, the stem lifting mechanism of the gate valve occupies a relatively high space, and when the valve is opened, the top of the stem must be at least Raise the height of one valve body bore size
Therefore, this large space occupation directly affects the arrangement of gas pipelines in the factory.
Therefore, the defect of taking up a large space brings some inconvenience to the application of rising stem gate valves, and the use is limited to a certain extent, which affects the application of rising stem gate valves in more occasions in metallurgy and coking industries.

Method used

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  • Sluice valve dual stem mechanism

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Embodiment Construction

[0011] Such as figure 1 As shown, the valve cover 3 is connected to the upper part of the valve body 2, and the gate plate 1 is installed in the valve body 2. This double valve rod mechanism is that the top of valve cover 3 is connected with the support 9 of a frame structure, and screw rod 8 is equipped with in the support middle part, and the upper end of screw rod passes support 9, and is screwed in the driving device 10 that is fixed on the support top. The driving device 10 can be an electric driving device driven by a motor, or a manual driving device including a hand wheel. The connecting piece 6 is flat, and a nut 7 is connected to the central hole in the middle, and the nut 7 is screwed and matched with the screw rod 8 . Both sides of the connecting piece 6 are fixedly connected to the top of a valve stem 5 respectively, and the two valve stems 5 should be kept parallel so as to drive the gate to go up and down smoothly. The lower end of the valve stem is connected ...

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Abstract

A double valve lever mechanism of gate valve used in valve device of pipeline, which features the driving device set on upper part of frame, the upper part of screw penetrated in driving device, the improvement is that the screw and valve lever are separated, connecter rotary jointed on screw, the valve lever lifting and lowering driven by connecter. Said invention can make gate board stable running and avoiding damage to the seal rubber ring resulting from swing and knocking.

Description

technical field [0001] The invention relates to a pipeline valve device, in particular to a double valve rod mechanism of a gate valve. Background technique [0002] Existing gate valves can be divided into two categories: rising stem gate valves and concealed stem gate valves, according to whether the valve stem is exposed. At present, most of the gate valves used on large-diameter gas pipelines are rising stem gate valves. This is because the rising stem gate valve can visually see the opening and closing situation and opening height of the gate plate in the valve body from the outside through the position of the valve stem, and because the trapezoidal thread part of the valve stem and the stem nut in the rising stem gate valve are both It is on the outside of the valve body and bonnet on the gate valve, so these parts can not be corroded by the pipeline medium, and the accumulation of dust and dirt in the medium will not occur. In addition, the rising stem gate valve al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K3/30
Inventor 邢毅栋
Owner 邢毅栋
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