The hard-seal high-pressure ball valve has two sealing surfaces. At present, the sealing surface materials of ball valves are widely used in various plastics. They have good sealing properties and can be completely sealed. They are also widely used in vacuum systems. Simple operation, fast opening and closing, only need to rotate 90 degrees from full switch to full switch, which is convenient for long-distance control.
The hard-seal high-pressure ball valve is easy to maintain, and the structure of the ball valve is simple. The sealing ring is generally movable, and it is more convenient to disassemble and replace. When fully opened or fully closed, the sealing surface of the ball and valve seat is isolated from the medium. When the medium passes, it will not cause corrosion of the valve sealing surface. It can be used in a variety of applications, ranging from small to a few millimeters in diameter, from high vacuum to high pressure. The ball valve can be used in media with suspended solid particles because it has wiping properties during opening and closing. Hard-seal high-pressure ball valves have been widely used in petroleum, chemical, electric power, metallurgy, papermaking and other industries.
Hard-seal high-pressure ball valves usually consist of a valve body, a valve cover, a ball, a valve seat and a valve stem. When in use, the ball at the bottom of the valve is driven to rotate by rotating the valve stem, so that the through hole on the ball corresponds to or staggers the flow path of the valve, so as to realize the opening or closing of the ball valve. Due to the friction between the ball and the valve seat during the rotation, severe wear can easily lead to leakage, which reduces the reliability of the ball valve and shortens the service life of the ball valve.
Although there is no wear ball valve, its structure is more complicated, and it is not very convenient to use and maintain. In order to overcome the shortcomings of the existing technology, we have developed a new type of hard-sealed high-pressure ball valve with no wear on the sealing surface. The utility model provides a hard-seal high-pressure ball valve with reasonable structure, no wear on the sealing surface of the ball valve and the sealing surface of the valve seat, long service life, convenient use and maintenance, good heat resistance, high pressure and sealing performance.
The body of the hard-seal high pressure ball valve is equipped with a through-hole ball. The upper end of the ball is connected with the transmission mechanism of the valve stem and the ball. The lower end of the ball is equipped with guide pins and the left and right bonnets with flow channels are installed on both sides of the valve body . The left and right seats are respectively installed on both sides of the left and right valve cover and the valve ball. The outer end of the seat is provided with a seat spring, and the sealing ring is arranged between the seat and the valve cover. The left and right valve covers are provided with supporting surfaces that contact the surface of the valve ball, which are characterized by spiral grooves on the surface of the valve ball and sealing surfaces recessed into the surface of the valve ball, and the corresponding spiral grooves and sealing surfaces are recessed into the end surfaces of the left and right valve seats, respectively. .
Post time: Mar-12-2021