US 11,867,318 B2
High-pressure fluid discharge device
Yoshitada Doi, Koshigaya (JP); Masayuki Oshima, Tsukuba (JP); Hiroaki Sasaki, Moriya (JP); and Naomi Hasegawa, Ishioka (JP)
Assigned to SMC CORPORATION, Chiyoda-ku (JP)
Appl. No. 17/764,408
Filed by SMC CORPORATION, Chiyoda-ku (JP)
PCT Filed Jun. 16, 2020, PCT No. PCT/JP2020/023523
§ 371(c)(1), (2) Date Mar. 28, 2022,
PCT Pub. No. WO2021/065090, PCT Pub. Date Apr. 8, 2021.
Claims priority of application No. 2019-181790 (JP), filed on Oct. 2, 2019.
Prior Publication US 2022/0333700 A1, Oct. 20, 2022
Int. Cl. F16K 7/17 (2006.01); F16K 31/385 (2006.01)
CPC F16K 7/17 (2013.01) [F16K 31/385 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A high-pressure fluid discharge device, comprising:
a body in which a first flow path communicating with an input port and a second flow path communicating with an output port are formed; and a diaphragm valve body configured to operate in conjunction with a valve seat provided in the body to switch between allowing and blocking communication between the first flow path and the second flow path,
wherein a valve chamber joined to the first flow path and a pilot chamber are defined. by the diaphragm valve body, a pilot passage configured to allow communication between the valve chamber and the pilot chamber is provided in the diaphragm valve body, and the high-pressure fluid discharge device comprises a pilot type spool valve configured to switch between allowing and blocking communication between the pilot chamber and a discharge port,
wherein the high-pressure fluid discharge device is configured to supply a pilot pressure from a drive unit of the pilot type spool valve to a first end side of a spool valve body of the pilot type spool valve, and is configured to introduce a pressure fluid in the pilot chamber into a second end side of the spool valve body, and
wherein the pressure fluid in the pilot chamber is introduced into the second end side of the spool valve body via a nap between an outer circumferential surface of the spool valve body and an inner circumferential surface of a valve housing.