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To provide a check valve configured to always close a flow path, which is easy to open even with a small amount of fluid from the upstream, and even when a large amount of fluid occurs, can cope with it quickly.SOLUTION: A check valve is composed of a flow path for fluid, a valve seat part provided around the flow path for fluid, and a valve body that prevents fluid from passing from the downstream side by contacting the valve seat part, and comprises an opening/closing mechanism that allows fluid from the upstream side to pass through and makes a first opening state by separating the valve body from the valve seat part, and an expansion mechanism that makes a second opening state of making the flow path for fluid wider than the first opening state when the opening/closing mechanism is opened.SELECTED DRAWING: Figure 1
【課題】常時流路を閉塞する構成の逆流防止弁において、上流からの流体が少量でも容易に開口し、且つ大量に流体が生じた場合でも迅速に処理することができる逆流防止弁を提供する。【解決手段】逆流防止弁を、流体の流路と、該流体の流路の周囲に設けた弁座部と、該弁座部に当接することで下流側からの流体の通過を防止する弁本体と、からなり、弁本体が弁座部から離間することで、上流側からの流体を通過させて第一の開口状態とする開閉機構と、開閉機構の開口時において、流体の流路を第一の開口状態よりも広くした第二の開口状態とする拡大機構と、を備えて構成する。【選択図】図1
To provide a check valve configured to always close a flow path, which is easy to open even with a small amount of fluid from the upstream, and even when a large amount of fluid occurs, can cope with it quickly.SOLUTION: A check valve is composed of a flow path for fluid, a valve seat part provided around the flow path for fluid, and a valve body that prevents fluid from passing from the downstream side by contacting the valve seat part, and comprises an opening/closing mechanism that allows fluid from the upstream side to pass through and makes a first opening state by separating the valve body from the valve seat part, and an expansion mechanism that makes a second opening state of making the flow path for fluid wider than the first opening state when the opening/closing mechanism is opened.SELECTED DRAWING: Figure 1
【課題】常時流路を閉塞する構成の逆流防止弁において、上流からの流体が少量でも容易に開口し、且つ大量に流体が生じた場合でも迅速に処理することができる逆流防止弁を提供する。【解決手段】逆流防止弁を、流体の流路と、該流体の流路の周囲に設けた弁座部と、該弁座部に当接することで下流側からの流体の通過を防止する弁本体と、からなり、弁本体が弁座部から離間することで、上流側からの流体を通過させて第一の開口状態とする開閉機構と、開閉機構の開口時において、流体の流路を第一の開口状態よりも広くした第二の開口状態とする拡大機構と、を備えて構成する。【選択図】図1
CHECK VALVE
逆流防止弁
FUJITA GENKI (Autor:in)
13.09.2021
Patent
Elektronische Ressource
Japanisch