An Intermittent Hard Sealed Zero-Friction Butterfly Valve

A hard-sealed, zero-friction technology, applied in the direction of lift valves, valve devices, engine components, etc., can solve the problems of high cost, high manufacturing and installation accuracy, and achieve good sealing, lower manufacturing accuracy, and easy manufacturing.

Active Publication Date: 2018-05-25
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this kind of butterfly valve still has the following disadvantages: incomplete gears require high manufacturing and installation accuracy, and the cost is high

Method used

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  • An Intermittent Hard Sealed Zero-Friction Butterfly Valve
  • An Intermittent Hard Sealed Zero-Friction Butterfly Valve
  • An Intermittent Hard Sealed Zero-Friction Butterfly Valve

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Embodiment Construction

[0018] Further describe the present invention below in conjunction with embodiment and accompanying drawing thereof, but it does not limit the claims of the present invention.

[0019] The intermittent hard-sealed zero-friction butterfly valve of the present invention (referred to as butterfly valve, see Figure 1-6 ) includes a driving device 1, a gland 2, a lower cover 10, a valve body 5, a valve stem 6, a butterfly plate 14 and a movable valve seat 17, the driving device 1 is provided with a handwheel 19, and the valve stem 6 passes through the valve body 5 , the upper and lower ends of the valve body 5 are equipped with a gland 2 and a lower cover 10, the upper end of the valve stem passes through the gland 2 and is connected to the drive device 1, and the lower part of the valve stem passes through the butterfly plate 14; the movable valve seat 17 can be The ring-shaped structure that moves axially along the inner wall of the valve body 5 is set in the valve body 5. The f...

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PUM

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Abstract

The invention relates to an intermittent hard-seal and zero-friction butterfly valve which comprises a driving device, a gland, a lower cover, a valve body, a valve rod and a butterfly plate. A hand wheel is arranged on the driving device, and the valve rod penetrates through the valve body. The gland and the lower cover are mounted at the upper end and the lower end of the valve body. The upper end of the valve rod penetrates through the gland to be connected with the driving device, and the lower portion of the valve rod penetrates through the butterfly plate. The intermittent hard-seal and zero-friction butterfly valve is characterized in that the butterfly valve further comprises a movable valve seat which is of an annular structure capable of making axial movement along the inner wall of the valve body and is arranged in the valve body; a side body is mounted at the front end of the valve body through a screw in a fastened mode; the rear end of the side body is inserted into the annular gap of the movable valve seat; movable matching gaps are reserved between the movable valve seat and the valve body and between the movable valve seat and the side body; sealing rings are mounted between the movable valve seat and the valve body and between the movable valve seat and the side body; and a spring is mounted between the outer end face of the valve seat and the side body.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to an intermittent hard-seal zero-friction butterfly valve. Background technique [0002] Existing hard seal butterfly valves generally include a valve body, a valve stem, a butterfly plate and a valve seat. The inner circle of the valve seat and the outer circle of the seal form a sealing pair. When the valve is closed, relying on the radial compression of the butterfly plate and the thrust of the positive medium, the sealing ring is elastically deformed to achieve an interference fit seal. Due to structural reasons, when the butterfly valve is opened and closed, there is always friction between the sealing pairs, which increases the torque of the opening and closing valve and slows down the opening and closing speed. The inevitable frequent opening and closing will cause accelerated wear of the sealing surface and improve the sealing performance. drop, eventually causing valve (l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K1/22F16K1/226
CPCF16K1/22F16K1/2261
Inventor 张建辉宋阳张万明王娟杨欣霖谭若诗
Owner HEBEI UNIV OF TECH
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