Flange right angle throttle valve

Abstract

The invention relates to a flange right angle throttle valve. The flange right angle throttle valve comprises a valve body, a valve cover, a valve stem and a valve core. The valve cover is connected and fixed to the valve body. The valve stem is arranged at the center of the valve cover. The valve core is arranged at the lower end of the valve stem. The valve core is arranged between an inlet andan outlet of the valve body. The valve stem is movably connected with the valve cover in a threaded mode. A valve bonnet is arranged at the upper end of the valve stem. The valve bonnet is arranged onthe valve stem in a sleeving mode. A filtering screen is arranged at the inlet of the valve body. The filtering screen is formed by a round ring plate and a filtering screen main body. An annular concave surface of formed in the inlet flange of the valve body. The filtering screen is arranged in the annular concave surface. The filtering screen annular plate is connected and fixed to the valve body by screws. Compared with the prior art, the filtering screen is arranged at the inlet of the valve body, the valve bonnet is arranged at the upper end of the valve stem, so that impurities are notliable to enter a thread of the valve stem; and a abrasion resisting carburized layer is arranged on the contact surface between the valve core and an inner cavity of the valve body, abrasion is not liable to appear after longtime use, so that the service life of the flange right angle throttle valve is prolonged. The sealing effect is good, and the service life is long.

Description

technical field [0001] The invention relates to the technical field of throttle valves, in particular to a right-angle flange throttle valve with good sealing effect and long service life. Background technique [0002] The existing flange right-angle throttle valve is generally composed of a valve body, a valve cover, a valve stem, a hand wheel and a valve core. The valve cover is connected and fixed in a sealed manner with the valve body. There is a spool, the spool is arranged between the inlet and the outlet of the valve body, the spool can move up and down with the rotation of the valve stem, and forms a sealed connection with the inner cavity of the valve body. At present, the contact surface between the valve stem and the valve cover of the existing flange right-angle throttle valve is often exposed, and there is no filter screen at the inlet, and impurities are likely to enter the thread of the valve stem during use, affecting the sealing of the valve stem; On the on...

AI Technical Summary

Problems solved by technology

At present, the contact surface between the valve stem and the valve cover of the existing flange right-angle throttle valve is often exposed, and there is no filter screen at the inlet, and impurities are likely to enter the thread of the valve stem during use, affecting the sealing of the valve stem; On the one hand, the contact surface between the spool and the inner cavity of the valve is also prone to wear due to long-term use, thus affecting the service life of the flanged right-angle throttle valve

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