Self-flushing damping and wear-resistant swing check valve

Abstract

The invention relates to a self-washing damping and wear-resistant rotation type check valve, which belongs to the technical field of a control device on a medium pipeline. The self-washing damping and wear-resistant rotation type check valve comprises a valve body, a valve deck, a valve shaft, a tumbler and a valve clack, wherein the valve deck is arranged on the valve body; the valve shaft is arranged on the upper end in the valve body, which is near one end of a water inlet; the tumbler is fixedly connected to the valve shaft; the valve clack is fixedly connected to the outer side of the tumbler; the water inlet end of the valve body is provided with a valve seat used to be sealed with the valve clack; the valve shaft passes through the valve body to extend out of the valve body; the part of the valve shaft, which extends out of the valve body, is fixedly connected with a rotary arm; a rotary arm traction device is fixedly arranged out of the valve body. The automatic damping device in the self-washing damping and wear-resistant rotation type check valve disclosed by the invention has the characteristics of simple structure, low manufacture cost and blocking resistance, reliable adjustable damping can be realized without an externally-connected device, and the problem of the water hammer is solved. The valve clack mechanism is prevented from shaking under the hydraulic fluctuation via the rotary arm traction device so as to prevent the valve shaft from being abraded.

Description

technical field [0001] The invention belongs to the technical field of control devices on medium pipelines, and in particular relates to a self-flushing damping and wear-resistant swing-up check valve. Background technique [0002] The swing check valve is the most common and the most widely applicable check valve, and it is also the oldest check valve. It is widely used, but it has the following defects: 1. Vibration under fluctuations, so the valve shaft bears fatigue load for a long time, and is prone to wear and tear. Once the valve shaft is worn, it will affect the sealing of the disc at the slightest, and the valve will fail to close at all if it is severe; 2. The opening and closing space of the swing check valve Large, so the closing valve water hammer is very large every time it is closed, damaging the pumping station or pipeline. Contents of the invention [0003] The object of the present invention is to provide a self-flushing damping and wear-resistant swing-...

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Problems solved by technology

[0002] The swing check valve is the most common and the most widely applicable check valve, and it is also the oldest check valve. It is widely used, but it has the following defects: 1. Vibration under fluctuations, so the valve shaft bears fatigue load for a long time, and is prone to wear and tear. Once the valve shaft is worn, it will affect the sealing of the disc at the slightest, and the valve will fail to close at all if it is severe; 2. The opening and closing space of the swing check valve Large, so the closing valve water hammer is very large every time it is closed, damaging the pumping station or pipeline

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