Bridging water hammer prevention valve group with filter backwash function

Abstract

The invention discloses a bridged water hammer prevention valve group with filtering and backflushing functions. The bridged water hammer prevention valve group comprise a main air exhaust valve and a buffer valve group connected with an inlet of the main air exhaust valve, wherein a filtering net is arranged between the inlet of the main air exhaust valve and the buffer valve group; a reverse water inlet is formed in a valve body at an inlet end of an overhauling valve; a sundry outlet is formed in a valve body at an outlet end of the overhauling valve; a micro-air exhaust valve and the reverse water outlet are communicated with a cavity of a body of the main air exhaust valve at the rear end of the filtering net through a pipeline; the buffer valve group comprises a buffer plate and throttling holes; back flow of a water column is restricted by the buffer plate and the throttling holes, a phenomenon that the water column is bridged and impacted is avoided, and a bridged water hammer is fundamentally eliminated; and water in the pipeline is reversely connected to the reverse backflushing filtering net in the main air exhaust valve through the reverse water inlet in the overhauling valve, and sundries in a filtering net filtering pipeline between the inlet of the main air exhaust valve and an outlet of the overhauling valve are discharged from the sundry outlet through the pipeline, so that a function of preventing blockage is realized.

Description

technical field [0001] The invention belongs to an exhaust valve in a pipeline, in particular to a composite exhaust valve. Background technique [0002] At present, the composite exhaust valve includes a valve body with a vertical channel, the valve body is connected to the valve cover, the valve body is provided with a bracket, the bracket is provided with a floating ball, and the flow channel hole wall of the valve cover is provided with a floating ball. The sealing pair between and the top of the valve body are connected with a micro exhaust valve. When the main exhaust valve exhausts a large amount, because the water flow in the pipeline is in an accelerated state at the initial stage of water supply, the compressed air in this state makes the exhaust valve enter a large amount of exhaust. When the flow rate is too high, it will cause a strong impact on the pipeline, especially when the air is exhausted. At the moment, the intensity of the impact reaches the maximum, a...

AI Technical Summary

Problems solved by technology

When the main exhaust valve exhausts a large amount, because the water flow in the pipeline is in an accelerated state at the initial stage of water supply, the compressed air in this state makes the exhaust valve enter a large amount of exhaust. When the flow rate is too high, it will cause a strong impact on the pipeline, especially when the air is exhausted. At the moment, the intensity of the impact reaches the maximum, and the pipeline is prone to burst at this time

At the same time, debris will be mixed in the pipeline, which will block the inlet of the exhaust valve during the exhaust process, thus affecting the normal operation of the exhaust valve

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