JPS62155276U

JPS62155276U -

Info

Publication number: JPS62155276U
Application number: JP4422886U
Authority: JP
Priority date: 1986-03-25
Filing date: 1986-03-25
Publication date: 1987-10-02

Description

[Brief explanation of the drawing]

第１図は本考案の背圧弁構造の実施例を示す断
面図、第２図は本考案の要部を示す第１図の部分
拡大図、第３図は本考案のバルブ構造のためのテ
スト流路を示すフロー線図、第４図及び第５図は
本考案の背圧弁の特性曲線図、第６図は従来の一
般的なガスクロマトグラフのキヤリヤガス流路を
示すフロー線図、第７図は最近の傾向として採用
されつつある典型的なキヤリヤガス流路を示すフ
ロー線図、第８図は第７図に示した流路構成中に
用いられる従来の背圧弁構造を示す部分断面図、
第９図はその動作状態の欠点を示すための部分断
面図、第１０図はその部分平面図である。１１……調圧ブロツク、１２……調整ねじ筒、
１３……調圧軸、１４……ダイヤフラム、１５…
…本体ブロツク、１６，１８……スプリングシー
ト、１７……スラストボール、１９……バルブ押
圧部材、２０……ナツト、２１……コイルスプリ
ング、２２……バルブ室、２３……ガス入口流路
、２４……ねじ穴、２５……ガス出口流路、２６
……バルブ流路部材、２７……Ｏリング、２８…
…バルブ体。 Figure 1 is a sectional view showing an embodiment of the back pressure valve structure of the present invention, Figure 2 is a partially enlarged view of Figure 1 showing the main parts of the present invention, and Figure 3 is a test for the valve structure of the present invention. Flow diagram showing the flow path, Figures 4 and 5 are characteristic curve diagrams of the back pressure valve of the present invention, Figure 6 is a flow diagram showing the carrier gas flow path of a conventional general gas chromatograph, and Figure 7. is a flow diagram showing a typical carrier gas flow path that is being adopted as a recent trend; FIG. 8 is a partial sectional view showing a conventional back pressure valve structure used in the flow path configuration shown in FIG. 7;
FIG. 9 is a partial sectional view showing the drawbacks of its operating state, and FIG. 10 is a partial plan view thereof. 11...Pressure regulating block, 12...Adjusting screw tube,
13...Pressure adjustment shaft, 14...Diaphragm, 15...
... Main body block, 16, 18 ... Spring seat, 17 ... Thrust ball, 19 ... Valve pressing member, 20 ... Nut, 21 ... Coil spring, 22 ... Valve chamber, 23 ... Gas inlet channel, 24...Screw hole, 25...Gas outlet channel, 26
...Valve passage member, 27...O ring, 28...
...Valve body.

Claims

[Claims for Utility Model Registration] A diaphragm pressed by a pressure regulating mechanism via a spring, an outer edge of the diaphragm supported from the opposite side of the pressure regulating mechanism, and a valve chamber partitioned by the diaphragm. a valve pressing member mounted on the diaphragm in the valve chamber; and a valve flow path with a through flow path mounted on the main body block so that its tip faces the valve pressing member in the valve chamber. an O-ring-shaped valve seat disposed on the distal end surface of the valve passage member; a perfectly round spherical valve fitted onto the valve seat; Connected to a carrier gas flow path of a gas chromatograph, characterized in that it includes a bored inlet flow path and an outlet flow path bored in the main body block so as to communicate with the through flow path of the valve flow path member. Back pressure valve for.