JPH0367779U

JPH0367779U -

Info

Publication number: JPH0367779U
Application number: JP12596689U
Authority: JP
Priority date: 1989-10-26
Filing date: 1989-10-26
Publication date: 1991-07-02

Description

[Brief explanation of drawings]

第１図はこの考案にかかるダブルチエツク弁の
たて断面図、第２図は第１図のＢ−Ｂ断面図、第
３図はこの考案の他実施例ダブルチエツク弁を示
す要部断面図、第４図は従来技術のチエツク弁の
たて断面図、第５図は第４図のＡより見た側面図
である。１……チエツク弁、２，１６……弁本体、３，
４，１７，１７′，３３……ポペツト、１５，３
２……ダブルチエツク弁、２０……ボール（バル
ブ）。 Fig. 1 is a vertical sectional view of a double check valve according to this invention, Fig. 2 is a sectional view taken along line BB in Fig. 1, and Fig. 3 is a sectional view of main parts showing another embodiment of the double check valve of this invention. , FIG. 4 is a vertical sectional view of a conventional check valve, and FIG. 5 is a side view as seen from A in FIG. 4. 1... Check valve, 2, 16... Valve body, 3,
4, 17, 17', 33...Poppet, 15, 3
2...Double check valve, 20...Ball (valve).

Claims

[Scope of utility model registration request]

Two poppets are installed in parallel in the middle of the hydraulic passage, and the two poppets are installed so that the opening operation directions are opposite to each other. In a check valve that is opened by pressure, the valve body is formed into a cylindrical shape, and a valve is provided at the tip of a poppet built into the valve body, and the valve is connected to the poppet axis hole and the poppet is opened. For pressure oil flowing in the forward direction, the poppet is opened to allow the oil to pass through, and for pressure oil flowing in the opposite direction, the poppet is opened in the opposite direction. A double check valve characterized in that the opening of the valve allows reverse pressure oil to pass through the center hole.