Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Double-seal stop valve

A shut-off valve and double-seal technology, which is applied in the direction of lifting valves, valve devices, engine components, etc., can solve problems such as internal leakage of valves, crushing of sealing surfaces, and accelerated wear of sealing surfaces of valve seats.

Pending Publication Date: 2019-03-08
浙江双华阀门科技有限公司
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the globe valves used today, the valve seat has only one sealing surface that acts as a seal. When the valve is closed, the pressure difference of the medium is all concentrated on the sealing surface, so the medium has a greater scouring force on the sealing surface of the valve seat, thereby accelerating the valve. The wear of the sealing surface of the seat reduces its service life
In addition, most structures ignore the damage of solid particles in the medium to the sealing surface
There are many solid particles in the impurities. When the valve is closed, the particles are easily caught between the sealing surfaces, crushing the sealing surfaces or causing the valve to close laxly, causing high-speed media to wash the sealing surfaces for a long time, resulting in internal leakage of the valve.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Double-seal stop valve
  • Double-seal stop valve
  • Double-seal stop valve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] Such as Figure 1-Figure 3 A double-seal globe valve shown includes a valve body 1, a valve stem 2 and a valve seat 3, the valve stem 1 is provided with a disc 4, the valve stem 2 penetrates into the valve body 1, and the valve body 1 is provided with The inlet cavity 11, the outlet cavity 12 and the connecting cavity 13 connecting the inlet cavity 11 and the outlet cavity 12, the valve seat 3 is installed on the connecting cavity 13, the valve seat 3 includes a valve seat cone surface 31 and is arranged along the moving direction of the valve flap 4 The valve seat ring surface 32, the valve disc 4 includes a valve disc cone surface 41 and a valve disc annulus 42 arranged along the moving direction of the valve disc 4, the valve seat cone surface 31 and the valve disc cone surface 41 cooperate with each other to form a cone seal The ring surface 32 of the valve seat and the ring surface 42 of the valve disc cooperate with each other to form a ring surface sealing pair. ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a double-seal stop valve. A valve base comprises a valve base conical surface and a valve base annular surface which is arranged along a moving direction of a valve clack, thevalve clack comprises a valve clack conical surface and a valve clack annular surface which is arranged along the moving direction of the valve clack, the valve base conical surface and the valve clack conical surface are mutually cooperate to form a conical surface sealing pair, the valve base annular surface and the valve clack annular surface are mutually cooperate to form a ring surface sealing pair, relative to the annular surface sealing pair, the conical surface sealing pair is arranged on the side closer to an outlet cavity. The double-seal stop valve has a dual-sealing auxiliary structure, in a valve closing process, the annular surface sealing pair is firstly sealed, the effect of the pressure reducing throttling in advance is achieved, and then impurities are blocked from entering the area of the conical surface sealing pair, then a small amount of medium after throttling is used for flushing, so that the sealing surface is self-cleaned, and the impurities are effectively prevented from remaining on the sealing surface; and meanwhile, the problem that the valve is not tightly closed or the sealing surface is damaged by pressing is effectively solved, the flushing of thehigh-speed medium on the sealing surface is avoided as well, and the working reliability of the stop valve is greatly improved.

Description

technical field [0001] The invention relates to a stop valve, in particular to a double-seal stop valve. Background technique [0002] The opening and closing part of the globe valve is a plug-shaped disc, the sealing surface is flat or sea-cone, and the disc moves linearly along the centerline of the valve seat. In the globe valves used today, the valve seat has only one sealing surface that acts as a seal. When the valve is closed, the pressure difference of the medium is all concentrated on the sealing surface, so the medium has a greater scouring force on the sealing surface of the valve seat, thereby accelerating the valve. The wear of the sealing surface of the seat reduces its service life. In addition, most structures ignore the damage of solid particles in the medium to the sealing surface. Impurities contain a lot of solid particles. When the valve is closed, the particles are easily caught between the sealing surfaces, crushing the sealing surfaces or causing th...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): F16K1/36F16K1/42F16K1/32
CPCF16K1/32F16K1/36F16K1/42
Inventor 李仁贵李越鹏
Owner 浙江双华阀门科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com