Diversion damper slowly-closed check valve

Abstract

The invention discloses a diversion damper slowly-closed check valve which comprises a valve body provided with medium circulation tubes at two ends. A valve seat is arranged in the valve body. The diversion damper slowly-closed check valve further comprises a diversion body check valve core arranged in the valve body, a support moving structure for supporting the diversion body check valve core, a sliding block connected with the diversion body check valve core, a sliding rod connected with the sliding block, and a non-return driving structure with one end contacted with the sliding block and used for driving the sliding block to perform non-return movement. The other end of the sliding rod is connected with a moving damper structure. The diversion body check valve core in the diversion damper slowly-closed check valve adopts a movable structure, namely the diversion effect and the sealing effect are played, the whole structure is convenient to install, the support moving structure is used for supporting the diversion body check valve core, the supporting is stable, and operation is stable. The moving damper structure can produce resistance to movement of the sliding block and the diversion body check valve core, quick movement is avoided, and dismantle of a pipeline water hammer and protection of a pipeline and a water pump are achieved through slow closing.

Description

Technical field [0001] The invention belongs to a water supply pipeline control valve, and particularly relates to a pipeline check valve in a large pipeline. Background technique [0002] Existing check valves used in large-scale water pipelines of more than 1 meter include butterfly check valves. The valve flap of this structure requires external power when it is closed, and the structural arrangement is more troublesome. In addition, when the valve flap is closed by rotation, Due to the effect of water flow, vibration will be generated, which will affect the normal operation of the valve. There is a quick-closing check valve in which the disc moves in a fixed guiding fluid, and the movement guiding structure of the disc is inconvenient to install. At the same time, the flow coefficient of the valve is small, and the water loss is relatively large when water passes through the valve through the pipeline; , The valve with the above structure cannot realize slow closing. Summar...

AI Technical Summary

Problems solved by technology

[0002] Existing check valves used in large water delivery pipelines over 1 meter include butterfly check valves. The disc of this structure requires external power when closing, and the structural layout is relatively troublesome. In addition, when the disc rotates to close, Vibration will be generated due to the action of water flow, which will affect the normal operation of the valve

There is an existing quick-closing check valve, the valve disc moves in a fixed guide body, and the movement guide structure of the valve disc is inconvenient to install. At the same time, the flow coefficient of the valve is small, and the water loss is relatively large during the process of water passing through the valve through the pipeline; at the same time , the valve with the above structure cannot realize slow closing

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