Low temperature resistant butterfly valve

A technology of low temperature resistance and butterfly valves, which is applied in the direction of lift valves, valve devices, engine components, etc., can solve the problems that are difficult to meet this requirement, and achieve the effect of overcoming cold flow and stress relaxation, reliable and effective sealing

Active Publication Date: 2014-03-19
JIANGSU EVALVE GRP
View PDF3 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To the applicant's knowledge, existing technologies are difficult to meet this requirement

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
  • Low temperature resistant butterfly valve
  • Low temperature resistant butterfly valve
  • Low temperature resistant butterfly valve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] This embodiment is a highly reliable ultra-low temperature double eccentric butterfly valve based on shape memory alloy, and its structure is as figure 1 , figure 2 As shown, it includes a valve body 1, a circular butterfly plate 2, a valve stem 3, and a sealing ring 4, a spring ring 5, a pre-tightening ring 6, a support ring 7, a retaining ring 8 and a fixing screw 9 arranged in the valve body 1.

[0023] The two perforated protrusions of the circular butterfly plate 2 are fixedly connected to the valve stem 3 by the pins 10 and are biased and installed on the valve body 1 through the valve stem. The valve stem 3 can rotate in the valve body 1. The butterfly plate 2 has an open position of a circular flow channel deflected around the axis of the valve stem 3 ( Figure 4 Dotted line position) and closed position ( figure 1 ), its end away from the valve stem 3 has a peripheral chamfer. The circular flow channel has an annular sealing groove at the peripheral chamfer corre...

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 relates to a low temperature resistant butterfly valve and belongs to the technical field of fluid control valves. The low temperature resistant butterfly valve comprises a valve body (1); a butterfly plate (2) is arranged on the valve body (1) in a bias mode through a valve rod (3); the butterfly plate comprises a flow channel opening device and a flow channel closing device which deflect around the axis of the valve rod; one end of the butterfly plate, which is far away from the valve rod, comprises a peripheral chamfer; the position of the peripheral chamfer of a flow channel, which is corresponding to the closed position of the butterfly plate, comprises a sealing clamping groove; a U-shaped cross section of low temperature resistant non-metal sealing ring (4) with the circular arc end adhered to the chamfering surface of the butterfly plate of the low temperature resistant butterfly valve is inserted into the sealing clamping groove; a spring ring (5) and a supporting ring (7) are embedded into the non-metal sealing ring; the trend that the circular arc end is adhered to the chamfering surface is kept due to the spring ring (5); the two outer sides of the U-shaped cross section are adhered to the wall of the sealing groove due to the supporting ring (7). According to the low temperature resistant butterfly valve, the sealing ring is adhered to the butterfly plate in a sealing mode under the action of contraction of the spring ring and accordingly the reliable effective sealing under the ultra-low temperature conditions can be ensured.

Description

Technical field [0001] The invention relates to a low temperature resistant butterfly valve, in particular to a highly reliable ultra-low temperature resistant low temperature butterfly valve sealing structure based on a shape memory alloy, belonging to the technical field of fluid control valves. Background technique [0002] With the rapid development of the petroleum, chemical and gas industries, especially the wide application of liquefied natural gas (LNG) as an emerging energy source, the demand for ultra-low temperature valves for LNG has rapidly increased. Because the temperature of LNG under normal pressure is -162℃, it is not only extremely low temperature, but also flammable and explosive, so higher and stricter requirements are put forward for the low temperature sealing performance of the valve. [0003] In the prior art, butterfly valves operating at room temperature often use metal-non-metal sealing pairs. However, in the low temperature state, because the expansion...

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
IPC IPC(8): F16K1/22F16K1/46
CPCF16K1/2263F16K1/2265F16K1/2266F16K1/465
Inventor 张艳秋江树勇赵亚楠钱存根钱玉峰吴纪福张春芳
Owner JIANGSU EVALVE GRP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap