CN204985810U - Hard -sealing and high -temperature ball valve - Google Patents

Abstract

A hard-sealed high-temperature ball valve, including a turbine at the top, a bracket is fixed under the turbine, a bushing is connected to the bracket, the bushing is fixed on the middle body, side bodies are fixed at both ends of the middle body, a ball is arranged in the middle body, and a ball is mounted on the ball The valve stem connected to the turbine is fixed, and the valve seat is embedded on the inner end of the side body. A pre-tightening spring is provided between the installation surface of the valve seat and the side body, and a scraper is provided on the sealing surface of the valve seat. The front end fits the surface of the sphere, the upper half of the middle body is provided with a purge hole, the outside of the middle body is provided with a purge valve, the purge valve is connected to the purge hole, and the lower half of the middle body is provided with a drain hole , a drain valve is arranged outside the middle body, and the drain valve is connected with the drain hole. The structure of the utility model is reasonable and compact. With the advantage of small contact area of the scraper, the friction between the valve seat and the ball is reduced, and the particles attached to the surface of the ball are scraped off. The inner area, prolonging the service life, the effect is remarkable.

Description

Hard seal high temperature ball valve

technical field

The utility model relates to the field of valves, in particular to a hard-sealed high-temperature ball valve.

Background technique

At present, with the massive construction of industrial facilities, more and more valves are used, and there are more and more types of valves with more and more functions. Among them, the use of hard-sealed high-temperature ball valves is also increasing. As a component used to realize on-off and flow control of pipeline systems, it has been widely used in many fields such as petroleum, chemical industry, metallurgy, and hydropower. Due to the cooperation between the ball and the valve seat in the hard-sealed high-temperature ball valve, there will be wear and tear, which will shorten the service life of the valve seat, and the internal structure of the valve body is not easy to clean, and foreign matter is easy to remain, which affects the reliability of the ball valve.

Utility model content

The utility model aims to solve the above-mentioned problems in the prior art, and provides a hard-sealed high-temperature ball valve, which solves the current problems that the valve seat is easy to wear and the inside of the valve body is not easy to clean.

The technical solution adopted by the utility model to solve its technical problems: this hard-sealed high-temperature ball valve includes a turbine at the top, a bracket is fixed below the turbine, the bracket is connected with a shaft sleeve, the shaft sleeve is fixed on the middle body, and the two ends of the middle body are fixed There is a side body, a sphere is arranged in the middle body, a valve stem is fixed on the sphere, the valve stem is connected to the turbine, a valve seat is embedded on the inner end of the side body, and a valve seat on the side body is arranged between the installation surface of the valve seat and the side body. The spring is pre-tightened, the sealing surface of the valve seat is equipped with a scraper, the front end of the scraper fits the surface of the sphere, the upper half of the middle body is provided with a purge hole connecting the inside and outside of the middle body, and the outside of the middle body is provided with a purge valve. The purge valve is connected with the purge hole, the lower half of the middle body is provided with a blowdown hole communicating with the inside and outside of the middle body, and the outside of the middle body is provided with a blowdown valve connected with the blowdown hole. After setting in this way, while the horizontal position of the ball is fixed, the pre-tightening spring makes the valve seat float, and the setting of the scraper is used to scrape off the particles attached to the surface of the ball to ensure the sealing between the valve seat and the ball. Taking advantage of the small contact area of the scraper, it can not only scrape off the particles on the surface of the ball, but also reduce the friction between the ball and the valve seat while ensuring the sealing performance, and prolong the service life; the purge valve cooperates with the drain valve for cleaning. , The purge valve is first connected to the air pump, and the gas is used to blow the particles out of the drain valve for further cleaning, that is, connect the water pipe to the purge valve, clean the area between the middle body and the sphere with water, and the sewage flows out of the drain valve.

Nickel-based hard alloy is spray-welded on the surface of the ball, the sealing surface of the valve seat and the scraper. Since the surface of the ball and the scraper need to cooperate with the rotation, the sealing surface of the valve seat, the surface of the ball and the scraper are all spray-welded with hard alloy. After precision grinding, more reliable sealing can be achieved and the service life can be extended.

The beneficial effects of the utility model are: the structure of the utility model is reasonable and compact, and the friction between the valve seat and the sphere is reduced by the advantage of the small contact area of the scraper, which reduces the wear of the valve seat, and can also scrape off the debris attached to the surface of the sphere. For particulate matter, the purge valve cooperates with the drain valve to form a cleaning mechanism, which can effectively clean the internal area of the middle body and prolong the service life. The effect is remarkable and it is suitable for promotion.

Description of drawings

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

Fig. 2 is the structural representation of the exterior of the middle body of the present utility model;

FIG. 3 is an enlarged view of part A in FIG. 1 .

Explanation of reference numerals: middle body 1, side body 2, ball 3, valve seat 4, preload spring 5, valve stem 6, bushing 7, bracket 8, turbine 9, purge hole 10, drain hole 11, purge Valve 12, drain valve 13, scraper 14.

detailed description

Below in conjunction with accompanying drawing, the utility model is further described:

Referring to the accompanying drawings: the hard-sealed high-temperature ball valve in this embodiment includes a turbine 9 located at the top, a bracket 8 is fixed below the turbine 9, the bracket 8 is connected to a bushing 7, and the bushing 7 is fixed on the middle body 1. The two ends of the body 1 are fixed with side bodies 2, the middle body 1 is provided with a ball 3, the valve stem 6 is fixed on the ball 3, the valve stem 6 is connected with the turbine 9, the inner end of the side body 2 is embedded with a valve seat 4, and the valve seat Between the installation surface of 4 and the side body 2, there is a pre-tension spring 5 on the side body 2 axially, and a scraper 14 is arranged on the sealing surface of the valve seat 4, and the front end of the scraper 14 fits with the surface of the sphere 3, and the middle body 1 The upper half of the middle body 1 is provided with a purge hole 10 connected to the inside and outside of the middle body 1. The outside of the middle body 1 is provided with a purge valve 12. The purge valve 12 is connected to the purge hole 10. The lower half of the middle body 1 is provided with a There is a blowdown hole 11 connecting the inside and outside of the middle body 1 , and a blowdown valve 13 is arranged outside the middle body 1 , and the blowdown valve 13 is connected with the blowdown hole 11 .

The surface of the ball 3, the sealing surface of the valve seat 4 and the scraper 14 are all spray-welded with nickel-based hard alloy.

Although the present invention has been illustrated and described with reference to preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made within the scope of the claims.

Claims (2)

1. A hard-sealed high-temperature ball valve, including a turbine (9) at the top, a bracket (8) is fixed below the turbine (9), the bracket (8) is connected to a shaft sleeve (7), and the shaft sleeve (7) is fixed in the middle On the body (1), the two ends of the middle body (1) are fixed with side bodies (2), the middle body (1) is provided with a ball (3), the ball (3) is fixed with a valve stem (6), and the valve stem ( 6) Connected to the turbine (9), the feature is: a valve seat (4) is embedded on the inner end of the side body (2), and a There is a pre-tension spring (5) on the axial direction of the side body (2), a scraper (14) is provided on the sealing surface of the valve seat (4), and the front end of the scraper (14) is attached to the surface of the sphere (3) Together, the upper half of the middle body (1) is provided with a purge hole (10) connecting the inside and outside of the middle body (1), and the outside of the middle body (1) is provided with a purge valve (12), so The purge valve (12) is connected to the purge hole (10), and the lower half of the middle body (1) is provided with a drain hole (11) connecting the inside and outside of the middle body (1). A drain valve (13) is provided outside the body (1), and the drain valve (13) is connected to the drain hole (11). 2. The hard-sealed high-temperature ball valve according to claim 1, characterized in that: the surface of the ball (3), the sealing surface of the valve seat (4) and the scraper (14) are all spray-welded with nickel-based hard alloy.