Large-caliber large-differential-pressure steam adjusting shut-off valve
A technology with large pressure difference and large diameter, which is applied in the field of large diameter and large pressure difference steam regulating cut-off valve, can solve the problems of poor valve plug guidance and stability, complex steam flow state, tearing actuator diaphragm, etc., and achieve reduction The diameter of the spool, good guidance, and the effect of reducing the vibration force
Pending Publication Date: 2020-12-04
HUIZHENG AUTOMATIC CONTROL VALVE GRP CO LTD
View PDF0 Cites 1 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] However, when the existing cut-off valve is in use, due to the complex steam flow state, it will generate a rotational force on the valve plug, causing the valve stem to fall off and tear the diaphragm of the actuator; , the steam will impact the valve plug to generate high-frequency oscillation, resulting in noise and valve stem fracture; the existing valve is under high temperature conditions, anti-high temperature lock, the gap between the valve plug and the sleeve is large, the guidance and stability of the valve plug Extremely poor, prone to vibration under steam
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
[0040] Embodiment: When using the shut-off valve, the anti-rotation structure is used to prevent the valve plug from generating a rotational force due to the complicated steam flow state, causing the valve stem to fall off and tear the diaphragm of the actuator. When in use, the valve body 5 is used for Through the steam flow; when the valve stem 1 rotates, the square bushing 10 prevents rotation while ensuring the positioning of the valve plug; the balance chamber causes insufficient pressure relief when the small valve core 8 is opened, especially when the gas medium has high residual pressure, The valve plug 6 needs a huge opening force to prevent accidental conduction of the valve body 5 caused by misoperation and improve the safety of use. When the small valve core 8 is closed, the balance chamber 3 is in a balanced state, and the valve plug 6 is easy to open at this time; An H-shaped spring 13 is set between the sleeve 4 and the valve plug 6 to make the two flexibly conne...
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 discloses a large-caliber large-differential-pressure steam adjusting shut-off valve which comprises a valve body and is characterized in that a valve deck is fixed to the top of the valve body through a bolt; a valve rod is rotatably connected into the valve deck through a bearing; an anti-rotation structure is arranged at the top of the valve rod and comprises a square sleeve fixedto the bottom end of the valve rod in a welded mode; an upper bearing is connected to the outer part of the square sleeve in a sleeving mode;the outer circumferential face of the upper bearing is fixedly connected with the inner wall of the valve deck in a clamped mode; a sleeve is fixed to the inner wall of the valve body through a bolt; a balance cavity is formed in the sleeve; a balance end cover is arranged at the bottom of the balance cavity; a small valve element is connected to the bottom of the square sleeve; a buffer spring is connected to the outer part of the small valve element ina sleeving mode; a valve plug is further arranged on the inner wall of the sleeve; an annular groove is formed in the top of the valve plug; and an H-shaped spring is embedded into the annular groove. The large-caliber large-differential-pressure steam adjusting shut-off valve provided by the invention has the characteristics of breakage prevention and high stability.
Description
technical field [0001] The invention relates to the technical field of shut-off valves, in particular to a large-diameter and large-pressure-difference steam regulating shut-off valve. Background technique [0002] The shut-off valve is a kind of actuator in the automation system, which is composed of a multi-spring pneumatic film actuator or a floating piston actuator and a regulating valve. The shut-off valve has a wide range of uses and can be used to cut off gas, combustion air, cold air and flue gas. [0003] However, when the existing cut-off valve is in use, due to the complex steam flow state, it will generate a rotational force on the valve plug, causing the valve stem to fall off and tear the diaphragm of the actuator; , the steam will impact the valve plug to generate high-frequency oscillation, resulting in noise and valve stem fracture; the existing valve is under high temperature conditions, anti-high temperature lock, the gap between the valve plug and the sl...
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): F16K1/50F16K1/42F16K1/46F16K27/08F16K39/02F16K47/02F16K47/08
CPCF16K1/42F16K1/46F16K1/50F16K27/08F16K39/024F16K47/02F16K47/08
Inventor 熊文丰邹晓波文平李光明刘灯
Owner HUIZHENG AUTOMATIC CONTROL VALVE GRP CO LTD