Sealing structure of needle-shaped stop valve
A technology of sealing structure and stop valve, applied in the direction of valve shell structure, lift valve, valve details, etc., can solve the problems of natural operation wear of valve core and seat, aggravated wear of sealing belt, short service life of needle stop valve, etc., to achieve The effect of reducing the rapid failure of the seal and prolonging the service life
Active Publication Date: 2014-02-19
BEIJING XIONGCHUAN VALVE MFG
View PDF8 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
When shutting off the needle globe valve, the working pressure of the medium is different, the viscosity of the liquid is different, and the size of the gas molecule is different. Objectively, different operating torques are required to close the needle globe valve, and the operator only applies the sealing torque to achieve shutoff based on past experience. Purpose, in most cases, excessive sealing force is applied, which increases the wear of the sealing belt and reduces the service life of the needle globe valve
[0005] In the process of realizing the present invention, the inventor found that the prior art has at least the following problems: whether it is the natural operation wear of the valve core or the valve seat, or the wear caused by improper human operation, it will lead to rapid failure of the needle cut-off valve, so now The service life of the needle globe valve is relatively short
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
[0026] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0027] see figure 1 , a sealing structure of a needle cut-off valve, including a valve stem 3, a valve core 1 and a valve body 2, a valve core 3 is arranged inside the valve body 2, one end of the valve stem 3 is connected to the valve core 1, the valve core 1 and the valve body 2 A first sealing band 21 and a second sealing band 22 are arranged between them, a second sealing band 22 is arranged above the first sealing band 21, the first sealing band 21 and the second sealing band 22 are arranged on the valve body 2, the first The sealing tape 21 and the second sealing tape 22 successively realize the sealing function.
[0028] As a preference, see figure 2 , the valve body 2 includes a valve seat 24 , the valve seat 24 is an area o...
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
| Property | Measurement | Unit |
|---|---|---|
| Axial dimension | aaaaa | aaaaa |
Login to View More
Abstract
The invention discloses a sealing structure of a needle-shaped stop valve. The sealing structure comprises a valve rod, a valve core and a valve body, the valve core is arranged in the valve body, one end of the valve rod is connected with the valve core, a first sealing tape and a second sealing tape are arranged between the valve core and the valve body, the second sealing tape is arranged above the first sealing tape, and the first sealing tape and the second sealing tape are arranged on the valve body and realize sealing functions one after another. The sealing structure is provided with the two sealing tapes which can take part in sealing one after another when the needle-shaped stop valve works, and quick sealing failure caused by abrasion and wear of the valve core and a valve seat due to the fact that a handle is screwed excessively is reduced, so that service life of the needle-shaped stop valve is prolonged.
Description
technical field [0001] The invention relates to the field of valves, in particular to a sealing structure of a needle stop valve. Background technique [0002] The needle globe valve is well known in the field of instrument valves, and it realizes the shut-off and cut-off of the fluid medium by squeezing and deforming the head of the valve core with a taper to the orifice of the cylindrical valve seat. During the closing process, by rotating the handle installed at the other end of the valve core, a sealing force is exerted on the contact surface between the valve core and the valve seat, and elastic and plastic deformation occurs on the contact surface to form a sealing band to realize the sealing of the fluid medium. [0003] When the needle globe valve works at a medium temperature or ambient temperature above 300°C, the valve core and valve seat are required to be made of corrosion-resistant metal materials, and stainless steel or nickel-based alloys are generally used. ...
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): F16K1/00F16K1/38F16K27/02
CPCF16K1/385F16K1/42F16K1/48
Inventor 刘茯蔚赵曦赵强
Owner BEIJING XIONGCHUAN VALVE MFG