Valve base springback type brake valve

Abstract

The invention discloses a valve base springback type brake valve which comprises a valve body, a brake plate and a springback type valve base assembly. A first groove is formed in the bottom of an inner cavity of the valve body, and a valve deck is connected to the valve body. The springback type valve base assembly comprises a valve base and a first elastic component. The valve base is located below the brake plate, and the upper surface and the lower surface of the first elastic component are connected with the valve base and the bottom of the first groove correspondingly. Meanwhile, the springback type valve base assembly has a first state and a second state; in the first state, the brake plate is disengaged from the valve base, and the upper surface of the valve base is flush with thebottom of the inner cavity of the valve body; and in the second state, the brake plate abuts against to the upper surface of the valve base to descend into the first groove. The structure is simple, water flow resistance loss can be reduced, the inlet pressure of a condensate pump is ensured, and the cavitation phenomenon is avoided.

Description

technical field [0001] The invention relates to the field of gate valves, in particular to a valve seat rebound type gate valve. Background technique [0002] The condensate system is to transport the saturated water in the condenser to the water supply system through the condensate pump. If the pressure of the inlet pipeline of the condensate pump drops to the saturated steam pressure of the water at the corresponding temperature, the water will start to vaporize and generate a large number of air bubbles. It moves forward with the water flow, and when it moves to a place with higher pressure, it will condense and collapse rapidly, forming cavitation, and generating noise, vibration and erosion of the condensate pump. Therefore, in order to ensure that the condensate pump does not suffer from cavitation, it is necessary to reduce the pressure loss of the inlet pipeline of the condensate pump during system design and ensure sufficient inlet pressure. The gate valve is the m...

AI Technical Summary

Problems solved by technology

The current valve design mainly changes the resistance of the valve by changing the valve gate structure (parallel type, wedge type), and does not take into account that when the valve seat is installed at the bottom of the valve body cavity, the valve body cavity is not a smooth passage. The unevenness caused by the valve seat will cause damage to the boundary layer of the water flow, turbulent flow, and the speed of the water flow will decrease, which will cause greater energy consumption, reduce the inlet pressure, and cause hidden dangers of cavitation

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