JPS6086874U

JPS6086874U - expansion valve

Info

Publication number: JPS6086874U
Application number: JP17956683U
Authority: JP
Inventors: 横田　正二; 松村　皓司; 鶴見　信夫
Original assignee: カルソニックカンセイ株式会社
Priority date: 1983-11-22
Filing date: 1983-11-22
Publication date: 1985-06-14

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は従来の膨張弁の一例を示す断面図、第□２図は
本考案の一実施例に係る膨張弁の要部を示す断面図、第
３図Ａ、　Ｂは第２図におけるボール弁の部分を示す拡
大断面図である。１・・・ケーシング、２・・・入口側流路、３・・・出
口側流路、４・・・スロート＆４ａ・・・弁座、５・・
・ボール弁、６・・・弁棒、訃・・ダイヤフラム、２０
・・・０リング、２３・・・第１軸受、２４・・・第２
軸受。Fig. 1 is a cross-sectional view showing an example of a conventional expansion valve, Fig. 2 is a cross-sectional view showing the main parts of an expansion valve according to an embodiment of the present invention, and Figs. 3 A and B are the balls in Fig. 2. FIG. 3 is an enlarged sectional view showing a portion of the valve. 1... Casing, 2... Inlet side flow path, 3... Outlet side flow path, 4... Throat & 4a... Valve seat, 5...
・Ball valve, 6...Valve stem, butt...Diaphragm, 20
...0 ring, 23...first bearing, 24...second
bearing.

Claims

[Scope of utility model registration request]

(1) A ball valve that connects the inlet side flow path and the outlet side flow path formed in the casing and opens and closes the throat portion in which the valve seat is formed is fixed to the tip of the valve stem, and the ball valve is fixed to the tip of the valve stem. A first bearing hole that fits into the rear end of the valve stem with a predetermined gap is attached to the front cage jig, and a first bearing hole that fits into the center part of the valve stem with a predetermined gap between the O-ring and the ball valve. A second bearing hole is formed in the casing to fit through a predetermined gap between the valve stem and the O-ring when the ball valve is separated from the valve seat. The first bearing hole or the second bearing hole is dimensioned so that the valve stem contacts the first bearing hole or the second bearing hole before the ball valve contacts the valve seat when the ball valve is tilted about the center. An expansion valve characterized by being set.

(2) The inner diameter of the throat part is a cusp, the radius of the ball valve is Ro, the diameter of the valve stem is 2d, the maximum dimension of the ball valve from the valve seat is Δy, and the distance between the center of the OIJ ring and the end face of the first bearing hole is When the distance is Ll, the distance between the center of the O-ring and the end face of the second bearing hole is L3, and the distance between the center of the O-ring and the end face of the valve seat is L3, the inner diameter of the first bearing hole is 2 Inner diameter of bearing hole 2
The expansion valve according to claim 1, wherein at least one of D2 and D2 is set to a value within a range determined by the following formula. d＜Dl〈d+L1/LJ
At f+2Δyd: Te sword