Main sealing and auxiliary plane double-sealing structure for stop valve
A technology of double sealing and sealing structure, applied in the valve shell structure, lift valve, valve details, etc., can solve problems such as affecting the normal use of the valve and reducing the sealing performance of the main seal of the valve, achieve good initial sealing performance, improve sealing performance, The effect of reducing the likelihood of failure
Pending Publication Date: 2022-01-18
SUFA TECH IND CNNC
View PDF0 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, after this structure operates for a certain number of times, different degrees of indentations will be produced on the sealing surfaces of the valve disc and the valve seat, which will greatly reduce the sealing performance of the main seal of the valve, and the leakage rate will far exceed the system requirements, thus affecting the performance of the valve. Normal use
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
[0016] The utility model relates to a double seal structure of the main seal and auxiliary plane for the stop valve, which adopts the structure of C-shaped ring plane seal + metal plane seal. After tightening the bolts of the middle flange with a certain torque, the longitudinal dimensions of each part form a dimensional chain, and the longitudinal dimensions of each part are reasonably controlled so that the compression ring presses the compression ring II, and the compression ring II presses the compression ring I , The compression ring I then presses the fixed piece, and the fixed piece is inserted into the opening of the C-shaped ring to fix the C-shaped ring on the groove of the valve body to prevent the C-shaped ring from leaving the valve seat. At the same time, the valve disc and the pressing ring I form a valve disc guide structure, which controls the skew of the valve disc and ensures the sealing performance of the valve.
[0017] When the valve is closed, two flat s...
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 belongs to a double-sealing structure, and particularly relates to a low-leakage-rate main-sealing double-sealing structure suitable for a nuclear-grade helium isolating valve of a high-temperature gas cooled reactor nuclear power station. A main sealing and auxiliary plane double-sealing structure for a stop valve comprises a valve body, wherein a valve cover is arranged at the top end of the valve body, a valve clack is arranged in a cavity formed by the valve body and the valve cover, and a sealing structure is arranged at the position, making contact with the valve body, of the bottom end of the valve clack. The double-sealing structure has the remarkable effects that the valve has good initial sealing performance due to the double-sealing structure, the valve can still keep good sealing performance after acting for a certain number of times, the overall structure is compact, the sealing performance of a main sealing pair of the valve is improved, and meanwhile, the possibility that the main sealing pair fails is reduced.
Description
technical field [0001] The invention belongs to a double sealing structure, in particular to a low leakage rate main sealing double sealing structure suitable for a nuclear-grade helium isolation valve of a high-temperature gas-cooled reactor nuclear power plant. Background technique [0002] The nuclear-grade helium isolation valve is a wide-ranging and large-scale pressure-bearing equipment in the high-temperature gas-cooled reactor. It needs to operate under high-temperature and high-pressure conditions, and plays an important role in ensuring the normal, stable operation and safety of the high-temperature gas-cooled reactor. High-temperature reactor gas-cooled reactors have high requirements on the sealing performance of the helium isolation valve, but due to the strong permeability of helium, this puts forward high requirements on the sealing performance of the main sealing pair of the helium isolation valve. At present, the common helium isolation valve adopts a spheri...
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 Patent Type & Authority Applications(China)
IPC IPC(8): F16K1/46F16K27/02
CPCF16K1/46F16K1/465F16K27/02
Inventor 汤晓刚王悦琴高志岗张易阳汝强吴莘馨严新虹王兰群高健飞俞飞李俊
Owner SUFA TECH IND CNNC