Thick oil thermal recovery single gate slab gate valve

Abstract

The invention provides a thick oil thermal recovery single disc flat gate valve. A left step hole and a right step hole are symmetrically formed in the two ends of a passage arranged in a valve body 1 of the thick oil thermal recovery single disc flat gate valve, in addition, the outer step hole is larger, the inner step hole is smaller, the smaller hole is a round hole 22, the larger hole is a slotted hole 23, a left static valve seat 2 is in a circular ring shape and is arranged in the round hole 22 of the left step hole, a left movable valve seat 3 is in a circular ring shape and is arranged in the slotted hole 23 of the left step hole, a right static valve seat 4 is in a circular ring shape and is arranged in the round hole 22 of the right step hole, a right movable valve seat 5 is in a circular ring shape and is arranged in the slotted hole 23 of the right step hole, and in addition, contact surfaces of the left static valve seat 2 and the left movable valve seat 3 and the contact surfaces of the right static valve seat 4 and the right movable valve seat 5 are respectively inclined surfaces. A valve plate 6 is inserted and arranged between the left movable valve seat 3 and the right movable valve seat 5, and when the valve plate 6 downwards moves, the left movable valve seat 3 and the right movable valve seat 5 are driven to downwards move for realizing the sealing. The work requirements of the single disc flat gate valve at high temperature and at high viscosity are met.

Description

technical field [0001] The invention belongs to the technical field of slab gate valves, in particular to a slab gate valve with a single gate for thermal recovery of heavy oil. Background technique [0002] The corrugated spring type floating seal is used between the valve plate and the valve seat of the ordinary flat gate valve, and the corrugated spring provides an initial seal between the valve plate and the valve seat without medium pressure. The spring acts together on the seat to create a tighter seal between the seat and the disc. However, in the process of thermal recovery of heavy oil, the viscosity of heavy oil is high, and it is easy to fill into the groove of the corrugated spring, causing the corrugated spring to fail. Moreover, the temperature of the heavy oil is also around 400 degrees, and ordinary non-metallic seals cannot meet the high temperature requirements, so only heat insulation structures can be used to improve the working conditions of the flat ga...

AI Technical Summary

Problems solved by technology

However, in the process of heavy oil thermal recovery, the viscosity of heavy oil is high, and it is easy to fill into the groove of the corrugated spring, causing the corrugated spring to fail

And the temperature of the heavy oil is also around 400 degrees, the ordinary non-metallic seal can not meet the high temperature requirements, only the heat insulation structure can be adopted to improve the working conditions of the flat gate valve

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