Energy-saving balanced high-pressure single seated valve

Abstract

The invention provides an energy-saving balanced high-pressure single seated valve which comprises a valve body, a valve cover, a valve rod, a valve core and a valve seat. The valve rod penetrates through the valve cover and extends into the interior of the valve body, the valve core is arranged on the middle portion of the valve rod, and the valve seat matched with the valve core is arranged on the inner wall of the valve body. Two sets of piston devices are arranged in the valve body and on two sides of the valve core in a symmetrical mode, piston cylinders in the two sets of the piston devices are used for processing piston guide stroke holes along the action direction of the valve rod on the inner surface of the valve body, and corresponding pistons are arranged on the valve rod. Acting force generated when a medium in the valve acts on the pistons and the section of the valve core is balanced out mutually, driving force needed by an actuator is reduced and energy is saved, the high pressure difference bearing capability of the valve is improved, and the valve core is free from the phenomenon of oscillating when the high-pressure difference is generated. The valve body is simple in structure, compared with a traditional medium flow channel, a Z-shaped medium flow channel is simple, small in damping coefficient, and therefore energy consumption of the valve is reduced; and processing in the valve body is convenient and easy and the blocking phenomenon of the medium is reduced due to arrangement of the Z-shaped medium flow channel and the piston guide stroke holes.

Description

technical field [0001] The invention relates to a valve, in particular to an energy-saving and balanced high-pressure single-seat valve. Background technique [0002] Single-seat valves of the prior art such as figure 1 As shown, regardless of whether the pressure difference is large or small, as the valve pressure increases, the valve core and stem receive a large upward force, and the required output force of the actuator is greater, and vice versa. . When the pressure and pressure difference are too large and the output force of the actuator is required to be too large, it is easy to cause the valve core to vibrate. And its "S" type flow channel is complicated, which affects the flow of medium. [0003] Double-seat valves of the prior art such as figure 2 As shown, although it can be applied to high pressure difference, its internal structure is complex, its processing and assembly precision requirements are high, and the medium flow path is complicated. Due to the d...

AI Technical Summary

Problems solved by technology

When the pressure and pressure difference are too large, when the output force of the actuator is required to be too large, it is easy to cause the valve core to oscillate.

And its "S" type flow channel is complex, which affects the flow of media

[0003] Double-seat valves of the prior art such as figure 2 As shown, although it can be applied to high pressure difference, its internal structure is complex, its processing and assembly precision requirements are high, and the medium flow path is complicated. Due to the double-seat seal, its sealing level is not high compared with the single-seat structure. Easy to leak

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