| 摘要 |
An auxiliary disk sliding type non-return valve is provided to release adhesion between a valve seat of a valve and a seat ring of a valve body with a small force by installing a valve body opening unit on a valve. An auxiliary disk sliding type non-return valve comprises a valve(110), a rotary shaft(120), a valve body(130), a weight and a damper(150), an auxiliary valve body, an opening and closing unit(170), and a valve body opening unit(180). The valve includes an internal passage(111) with a valve seat(112) on the inner periphery of the passage. The rotary shaft is extended to horizontally penetrate the valve and to be projected outwardly. The valve body is rotatably combined around the rotary shaft to open and close the passage, having a port(131) penetrated in the middle and a rubber seat ring(132) combined on its outer periphery. The weight and the damper are connected at one end portion of the rotary shaft. The auxiliary valve body opens and closes the port of the valve body. The opening and closing unit consists of an auxiliary shaft(171) horizontally crossing the passage of the valve, so as to open and close the auxiliary valve body by the rotation of the rotary shaft, an arm(172) secured to the auxiliary shaft, a link member(173) whose one end is hinged to the arm and another end is hinged to the auxiliary valve body, and a guide member(174) supporting the opposite ends of the auxiliary valve body to the valve body while allowing sliding movements of the opposite ends. The valve body opening unit is installed on the vale to release the adhesion between the valve seat and the seat ring of the valve body caused by a long closure of the valve body to the valve.
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