JPS633575U

JPS633575U -

Info

Publication number: JPS633575U
Application number: JP9666886U
Authority: JP
Priority date: 1986-06-26
Filing date: 1986-06-26
Publication date: 1988-01-11

Description

[Brief explanation of the drawing]

第１図ないし第５図はこの考案の実施例に関し
、第１図及び第２図はアンロード弁の正面の断面
図及び右側面図、第３図はアンロード弁の使用例
を示す図、第４図及び第５図はそれぞれガンノズ
ルの開時及び閉時においてアンロード弁内の弁体
等の位置を示す図、第６図は従来のアンロード弁
を示す図である。３０……アンロード弁、３４……入口、４０…
…出口、４２……第一の通路、４４……逆止弁、
５２……弁座、５３……第二の通路、５４……調
圧用弁体、５６……余液口、５８……ピストン、
６０……ピストンロツド、７０……調節ねじ（調
節手段）。 Figures 1 to 5 relate to an embodiment of this invention, Figures 1 and 2 are front sectional views and right side views of the unload valve, Figure 3 is a diagram showing an example of how the unload valve is used, FIGS. 4 and 5 are views showing the positions of the valve body, etc. in the unload valve when the gun nozzle is opened and closed, respectively, and FIG. 6 is a view showing a conventional unload valve. 30...Unload valve, 34...Inlet, 40...
...Outlet, 42...First passage, 44...Check valve,
52... Valve seat, 53... Second passage, 54... Valve body for pressure regulation, 56... Leftover liquid port, 58... Piston,
60...Piston rod, 70...Adjustment screw (adjustment means).

Claims

[Claims for Utility Model Registration] (1) A first passage that communicates the inlet and the outlet, a second passage that branches off from the first passage and leads to the leftover liquid port, and a second passage that is connected to the second passage. a pressure regulating valve body seated on the provided valve seat from the side opposite to the first passage;
a check valve that is disposed in the first passage on the outlet side of the branch point of the second passage and prevents backflow of liquid from the outlet to the inlet; a piston rod that separates the pressure regulating valve body from the valve seat; a piston that is fixed to the piston rod and receives hydraulic pressure on the inlet side and the outlet side from the check valve on each surface on the piston rod side and on the opposite side to the piston rod; and an adjusting means for adjusting the elasticity with which the pressure regulating valve body is brought into pressure contact with the valve seat. (2) The unload valve according to claim 1, wherein the valve body is spherical.