Low friction plate gate valve

Abstract

The invention relates to a low friction flat gate valve which comprises a valve body, a valve cap, valve seats, a flashboard, a valve rod and a hand wheel, wherein a pair of the valve seats is fixedly mounted inside the valve body in a coaxial and hermetic manner; the flashboard is mounted between the valve seats in the vertical direction in a sliding and guiding manner; the valve rod is fixedly mounted at the upper end of the flashboard in the vertical direction in a coaxial manner; the upper part of the valve rod extends out of the valve cap; the hand wheel is mounted at the upper part, positioned at the upper part of the valve cap, of the valve rod in a coaxial manner; combined filling material is mounted on the valve cap inner side between the valve rod and the valve cap; a spring hole is formed in one of the valve seat at the axial contact position with the valve body; a spring is mounted inside the spring hole in a propping manner; a wedge boss is arranged on the surface, in contact with the flashboard, of the valve seat; a guide bevel step is manufactured on the flashboard at the position corresponding to the wedge boss. According to the flat gate valve, the abrasion of the hermetic surfaces of the valve seats and the removal torque of the valve are effectively reduced, and the service life of the valve is greatly prolonged.

Description

technical field [0001] The invention belongs to the field of valves, in particular to a low-friction flat gate valve. Background technique [0002] At present, during the opening and closing process of most flat gate valves, the sealing surface of the valve seat and the gate is always in contact, that is, every time the valve is opened and closed, the sealing surfaces of the valve seat and the gate are constantly rubbing against each other. The switching torque of the valve is large, and the wear of the valve seat and the gate plate is accelerated, resulting in a short service life of the valve. SUMMARY OF THE INVENTION [0003] The object of the present invention is to overcome the disadvantages of the prior art and provide a low-friction slab gate valve with small torque, easy operation and long service life. [0004] The present invention solves its technical problem and realizes by taking the following technical solutions: [0005] A low-friction slab gate valve, inc...

AI Technical Summary

Problems solved by technology

[0002] At present, during the opening and closing process of most flat gate valves, the sealing surface of the valve seat and the gate is always in contact, that is, every time the valve is opened and closed, the sealing surfaces of the valve seat and the gate are constantly rubbing against each other. The switching torque of the valve is large, and the wear of the valve seat and gate is accelerated, resulting in a short service life of the valve

Images