Valve seat sealing structure of glue-lined butterfly valve
A technology of sealing structure and valve seat, applied in the direction of shaft seal, lift valve, valve details, etc., to achieve the effect of reducing driving torque, prolonging service life and reducing height
Pending Publication Date: 2019-06-07
JIANGSU SHENTONG VALVE
View PDF0 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] In order to overcome the shortcomings of the existing rubber-lined butterfly valve seat sealing structure, the present invention provides a valve seat sealing structure with good sealing performance
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0015] like Figure 1-8 As shown, a valve seat sealing structure of a rubber-lined butterfly valve includes a valve seat 1 and a butterfly plate 2. The valve seat 1 is provided with an S-shaped sealing strip 3, and the S-shaped sealing strip 3 includes a main sealing strip 3-1, a sealing ring 3-2 and the auxiliary sealing strip 3-3, the main sealing strip 3-1 forms a sealing pair with the side edge 4 of the butterfly plate 2, the sealing ring 3-2 is in contact with the shaft seat 5 of the butterfly plate, and the sealing ring 3-2 is a spherical inner Concave, the butterfly plate shaft seat 5 is spherical and convex, the sealing ring 3-2 and the butterfly plate shaft seat 5 are consistent and sealed, and the junction of the butterfly plate shaft seat 5 and the side edge 4 of the butterfly plate 2 is a butterfly The transition portion 6 of the plate, the auxiliary sealing strip 3-3 is sealed and attached to the transition portion 6 .
[0016] The butterfly plate 2 starts to rot...
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
Login to View More Abstract
The invention provides a valve seat sealing structure of a glue-lined butterfly valve. The valve seat sealing structure of the glue-lined butterfly valve comprises a valve seat and a disc. The valve seat is provided with an S-shaped sealing strip. The S-shaped sealing strip comprises a main sealing strip, a sealing ring and an auxiliary sealing strip. A sealing pair is formed by the main sealing strip and side edges of the disc. The sealing ring is in contact with a disc shaft seat. The sealing ring is of a spherical inward-concave shape. The disc shaft seat is of a spherical outward-convex shape. The sealing ring and the disc shaft seat are matched with each other and attached in a sealed manner. The junction of the disc shaft seat and the side edges of the disc is a transitional portionof the disc, and the auxiliary sealing strip and the transitional portion are attached in a sealed manner. The valve seat sealing structure of the glue-lined butterfly valve has the beneficial effectsthat an S-shaped sealing strip is adopted, a sealing surface is pressed by the main sealing strip in a face-contact manner, abrasion of the sealing surface is reduced, and the service life of the glue-lined valve seat is prolonged; the sealing ring of a valve shaft inserting portion is of a spherical outward-convex shape, the protruding height of the valve seat can be lowered, and the driving torque is reduced; and one the one hand, airtightness of the transitional portion is guaranteed by the auxiliary sealing strip, and on the other hand, compared with the existing large-area pressing contact, the driving torque is reduced by the auxiliary sealing strip.
Description
Technical field [0001] The invention relates to a rubber-lined butterfly valve, in particular to its valve seat structure. Background technique [0002] like figure 1 As shown, the butterfly plate starts to rotate under the action of the driving device until the butterfly plate 2 presses the sealing surface of the valve seat 1 to achieve sealing. The seat will be worn due to long-term switching, which affects the sealing quality and shortens the service life of the valve seat, and when the valve is opened or closed, the driving torque is far greater than the torque required during the switching process; in addition, the seat where the valve shaft is inserted The sealing surface of the butterfly plate and the butterfly plate are processed into a flat type. In order to ensure the sealing of the joint, the interference here is relatively large; moreover, when there are impurities in the medium, it is easy to cause the valve seat and the butterfly plate to jam. Contents of 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
Login to View More IPC IPC(8): F16K1/226F16K41/02
Inventor 曹娟娟钱凯峰陈森林
Owner JIANGSU SHENTONG VALVE