| 摘要 |
A pressure control valve of a power sprayer is provided to easily execute spraying work with one operator by keeping pressure correspondent to the elastic power of a spring of a second pressure chamber in a spray hose in stopping spraying. In forming a first pressure chamber(15) in a body(10), a spacer cylinder(10-1) is inserted into the chamber. Lower parts of valve seats(8) are connected to a delivery port of a power sprayer and the valve seat is equipped with an O-ring at the upper side. A discharge passage(1-3) is formed in an equalizing piston(1) and connected to a passage(5-1). Second pressure chambers(6) are formed at the outer peripheries of large and small end portions of the equalizing piston by a spacer cylinder(1-2) and guide rings(1-1,7) equipped with O-rings. A poppet valve(2) equipped with an O-ring is installed at the upper part of the guide ring. An O-ring is installed at the large end portion of the poppet valve to prevent a water leakage. A pressure regulating unit is formed by using the tip of a lower end of the small end portion as a valve and a central portion of the guide ring as a valve seat and connected to the second pressure chamber to regulate pressure by a press rod(2-1). A filtering net(12) and a check valve mounting ring(4-1) are installed at the body by forming a passage at one side of the spacer cylinder and the body. A valve seat(4) having a passage and a check valve(3) are assembled to the check valve mounting ring by a guide(3-1) and a spring. The passage of the valve seat is connected to the second pressure chamber and the passage of the equalizing piston by a choke(5).
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