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Rotary plug valve

A plug valve and valve core technology, applied in the field of plug valves, can solve problems such as low service life of plug valves

Active Publication Date: 2017-06-09
ZHEJIANG DUNAN MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a plug valve to solve the problem of low service life of the plug valve in the prior art

Method used

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  • Rotary plug valve
  • Rotary plug valve
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Examples

Experimental program
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Embodiment Construction

[0026] Embodiments of the invention are described in detail below, but the invention can be practiced in many different ways as defined and covered by the claims.

[0027] The direction of the arrow in the figure indicates the rotation direction of the rod body.

[0028] Please refer to Figures 1 to 9 According to the embodiment of the present invention, the plug valve includes a seat body 10, a rod body 30, a guide sleeve 40, a drive sleeve 90, a first pin shaft 42 and a drive mechanism.

[0029] The rod body 30 is slidably arranged in the seat body 10 . The guide sleeve 40 is fixedly arranged on the first end of the base body 10 and is sleeved outside the rod body 30 , the guide sleeve 40 is provided with a guide groove 41 , and the projection of the guide groove 41 on the longitudinal midplane of the guide sleeve 40 is U Glyph or flat-bottomed U-shape.

[0030] The drive sleeve 90 is axially limited relative to the guide sleeve 40 , is sleeved with the guide sleeve 40 ,...

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PUM

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Abstract

The invention provides a rotary plug valve, which comprises a seat body, a rod body, a guide sleeve, a driving sleeve, a first pin shaft and a driving mechanism, wherein the rod body is glidingly arranged in the seat body; the guide sleeve sleeves the outside of the rod body; a guide groove is formed in the guide sleeve; the projection of the guide groove in the longitudinal plane of the guide sleeve is in a U shape, a V shape, a flat bottom V shape or a flat bottom U shape; the position of the driving sleeve is limited relative to the axial direction of the guide sleeve; the driving sleeve is rotationally arranged relative to the guide sleeve; a driving groove is formed in the driving sleeve; the projection of the driving groove in the longitudinal middle plane of the driving sleeve is a polygon-shaped hole; the polygon-shaped hole forms two driving inclined edges in a way of corresponding to the two groove edges of the U shape; the first pin shaft is arranged in the rod body in the radial direction of the guide sleeve; at least one end of the first pin shaft is simultaneously arranged in the guide groove and the driving groove in a penetrating way; the driving mechanism is in driving connection with the driving sleeve, and drives the driving sleeve to rotate relative to the guide sleeve. The rotary plug valve provided by the invention can solve the problem of low service life of the rotary plug valve in the prior art.

Description

technical field [0001] The invention relates to the technical field of switching valves, in particular to a plug valve. Background technique [0002] In the prior art, the plug valve uses a driving device to realize the lifting of the valve core and the pressing of the valve core, so as to realize the switching and reset sealing of the switching valve. The driving device includes a motor and a driving mechanism, and the reversing process of the switching valve mainly depends on the transmission and conversion of the rotation of the motor through the transmission structure. [0003] In the prior art, there is a plug valve. The guide sleeve cooperates with the valve stem to realize the rotation and pressing action of the valve stem, thereby driving the valve core to rotate. This structure can easily realize the state switching of the plug valve, and the structure Simple and low cost, but because the valve stem rotates and presses down at the same time, when the valve stem rot...

Claims

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Application Information

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IPC IPC(8): F16K5/02F16K5/08
CPCF16K5/02F16K5/0242
Inventor 王定军田鹏
Owner ZHEJIANG DUNAN MASCH CO LTD