CN201535362U

CN201535362U - Tri-eccentric hard sealing butterfly valve

Info

Publication number: CN201535362U
Application number: CN2009201593140U
Authority: CN
Inventors: 邱慧鹏
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-06-10
Filing date: 2009-06-10
Publication date: 2010-07-28
Anticipated expiration: 2019-06-10

Abstract

The utility model discloses a valve, in particular a tri-eccentric hard sealing butterfly valve, which can be used for adjusting or cutting off the flow in a pipeline for production of high-temperature sulfuric acid. The butterfly valve comprises a valve body, a valve stem is arranged in the radial direction of the valve body, a valve plate which is arranged in the cavity of the valve body is fixedly connected with the valve stem, the peripheral side of the valve plate is provided with a valve plate opening, the inner side of the valve body is fixed with a seal ring with the section being of a groove shape, and the seal ring is matched with the valve plate opening. Since the valve plate opening is arranged on the peripheral side of the valve plate, and the seal ring with the section of the groove shape is matched with the valve plate opening and is also fixedly connected with the cavity of the valve body, thereby forming the face contact type hard sealing butterfly valve, the utility model solves the problems of easy aging and corrosion of the seal component in the prior art, prolongs the service life of the seal component, needs no frequent shutdown for replacement or maintenance, and improves the production efficiency.

Description

Three eccentric hard seal butterfly valves

Technical field

The utility model relates to a kind of valve, and particularly a kind of three eccentric hard seal butterfly valves utilize this valve regulation flow or dam in producing the pipeline of high-temperature concentrated sulfuric acid.

Background technique

In the production process of high-temperature concentrated sulfuric acid, must there be valve that its flow is advanced and controls or dam.At present commonly used three eccentric hard seal butterfly valve ubiquity working lifes are short, rotproofness is poor, need frequent maintenance or replacing, dead time long shortcoming, cause the cost of production height.

Summary of the invention

The purpose of this utility model provide a kind of long service life, rotproofness strong, need not often to shut down change, maintenance, the three eccentric hard seal butterfly valves that can enhance productivity, overcome the deficiencies in the prior art.

Of the present utility model three eccentric hard seal butterfly valves, comprise valve body, two ends of valve body is flange-like, it is characterized in that: the footpath of valve body is provided with cover upward, the below is provided with traps, valve rod and last cover and trapping matches, the bottom screw of valve body is connected with lower cover, be provided with sealing gasket between lower cover and the valve body, between the upper end valve rod of last cover and valve body, be provided with bearing on the valve body, and by upper press cover and bolt, on valve rod, be positioned at body cavity and be fixedly connected with valve plate by first pressing plate and set screw, the peripheral side of valve plate is a conical surface shape, be provided with one deck valve plate mouth on this conical surface, be fixed with seal ring at the inner chamber of valve body, the section of seal ring is channel form, one side of seal ring abuts on the side of body cavity and by second pressing plate and screw and connects, and matches with the valve plate mouth in the another side of seal ring.

Of the present utility model three eccentric hard seal butterfly valves; because the valve body of the ductile cast iron material that contains 0.5% bronze medal and 0.8% evanohm is arranged; the valve plate of the ductile cast iron material that contains 0.5% bronze medal and 0.8% evanohm is installed by valve rod in the valve body inboard; the valve plate mouth that the stainless steel material of one deck silicon content between 4%--8% arranged at the peripheral side of valve plate; is furnished with the seal ring that section is the stainless steel material of the silicon content of fixedlying connected with body cavity between 4%--8% of channel form mutually with the valve plate mouth; the hard seal butterfly valve of formation face contact; strengthened rotproofness; prolonged the working life of valve; need not often to shut down and change or maintenance, improved manufacturing efficiency.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment;

Fig. 2 is an A portion partial enlarged drawing shown in Figure 1.

Embodiment

As shown in Figure 1, 2: 1 is valve body, and the two ends of valve body 1 are flange-like, can join by flange and pipeline during installation.Be provided with upward in the footpath of valve body 1 and overlap 2, the below is provided with traps 10, and valve rod 5 and last cover 2 and trapping 10 matches, and its bottom screw is connected with lower cover 8, is provided with sealing gasket 9 between lower cover 8 and the valve body 1.Be provided with bearing 3 between the upper end valve rod 5 of last cover 2 and the valve body 1 on the valve body 1, and passing through upper press cover 4 and bolt.Be positioned at valve body 1 inner chamber and be fixedly connected with valve plate 11 by first pressing plate 6 and set screw 7 on valve rod 5, valve plate 11 can rotate with valve rod 5.The peripheral side of valve plate 11 is a conical surface shape, is provided with one deck valve plate mouth 12 on this conical surface, and valve plate mouth 12 can be the processing mode built-up welding of built-up welding on the conical surface, carries out the machining moulding after the built-up welding again.Inner chamber at valve body 1 is fixed with seal ring 13, and the section of seal ring 13 is channel form, and wherein a side abuts on the side of valve body 1 inner chamber and by second pressing plate 14 and screw and connects, and matching with valve plate mouth 12 in the another side, plays seal action.Consider the corrosive action of sulfuric acid, wherein the material selection of valve plate mouth 12 and seal ring 13 contains silicon stainless steel, and silicon content is 4%--8%; The material selection of valve body 1 and valve plate 11 contains the alloy nodular cast iron of 0.5% bronze medal and 0.8% chromium.

Claims

1. eccentric hard seal butterfly valve, comprise valve body (1), the two ends of valve body (1) are flange-like, it is characterized in that: the footpath of valve body (1) is provided with cover (2) upward, the below is provided with trap (10), valve rod (5) matches with last cover (2) and trap (10), the bottom screw of valve body (1) is connected with lower cover (8), be provided with sealing gasket (9) between lower cover (8) and the valve body (1), between upper end valve rod (5) that is positioned at cover (2) on the valve body (1) and valve body (1), be provided with bearing (3), and by upper press cover (4) and bolt, on valve rod (5), be positioned at valve body (1) inner chamber and be fixedly connected with valve plate (11) by first pressing plate (6) and set screw (7), the peripheral side of valve plate (11) is a conical surface shape, on this conical surface, be provided with one deck valve plate mouth (12), inner chamber at valve body (1) is fixed with seal ring (13), the section of seal ring (13) is channel form, one side of seal ring (13) abuts on the side of valve body (1) inner chamber and by second pressing plate (14) and screw and connects, and matches with valve plate mouth (12) in the another side of seal ring (13).