JPH0277368U

JPH0277368U -

Info

Publication number: JPH0277368U
Application number: JP15665388U
Authority: JP
Priority date: 1988-12-02
Filing date: 1988-12-02
Publication date: 1990-06-13
Anticipated expiration: 2003-12-02
Also published as: JPH0710136Y2

Description

[Brief explanation of drawings]

第１図〜第４図は本考案のボールバルブの実施
例を示したものであり、第１図はボールバルブの
１実施例を示す部分縦断面図、第２図は他の実施
例を示す部分縦断面図、第３図ａ乃至ｄは夫々第
１図に示した実施例の環状空間の断面形状を変え
た場合の部分縦断面図、第４図は更に他の実施例
を示す部分縦断面図であり、第５図は金属製環を
嵌装したボールシートを有するボールバルブの従
来例を示す部分縦断面図である。１……ボールバルブ、２……バルブ本体、２ａ
……流路、２ｂ……拡径段部、３……ボールシー
ト、３ａ……外周面、３ｂ……側面、３ｃ……直
角段部、３ｄ……突当面、３ｅ……外周溝、４…
…金属製環、５……リテーナ、５ａ……側面、５
ｂ……直角段部、６……環状板ばね、７……ボー
ル、８……環状空間、８ａ，８ｂ……側面、９…
…パツキン。 Figures 1 to 4 show embodiments of the ball valve of the present invention, with Figure 1 being a partial vertical sectional view of one embodiment of the ball valve, and Figure 2 showing another embodiment. 3a to 3d are partial longitudinal sectional views of the embodiment shown in FIG. 1 when the cross-sectional shape of the annular space is changed, and FIG. 4 is a partial longitudinal sectional view of yet another embodiment. FIG. 5 is a partial vertical sectional view showing a conventional example of a ball valve having a ball seat fitted with a metal ring. 1...Ball valve, 2...Valve body, 2a
...Flow path, 2b...Expanded diameter stepped portion, 3...Ball seat, 3a...Outer peripheral surface, 3b...Side surface, 3c...Right angle step, 3d...Abutting surface, 3e...Outer circumferential groove, 4 …
...Metal ring, 5...Retainer, 5a...Side surface, 5
b... Right angle step, 6... Annular leaf spring, 7... Ball, 8... Annular space, 8a, 8b... Side surface, 9...
...Patsukin.

Claims

[Scope of Claim for Utility Model Registration] (1) A ball valve equipped with a pair of ball seats with a cylindrical metal ring fitted on the outer circumferential surface, the ball side of the inflow channel and the outflow channel of the valve body. forming an enlarged-diameter stepped portion with an opening, the ball seat, the retainer, and the annular spring are sequentially attached to the enlarged-diameter stepped portion from the ball side, and a right-angled stepped portion is provided on the side surface of the ball seat facing the retainer. , a rectangular shape such as a substantially square or rectangular cross section opening in the outer circumferential direction between the retainer and the ball seat that fits into the right angle stepped portion of the ball seat and has the metal ring fitted on the side surface facing the ball seat of the retainer; 1. A ball valve characterized in that a right-angled stepped portion is provided to form an annular space, and a packing is attached to the annular space. (2) The ball valve according to claim 1, wherein the seal is made of expanded graphite. (3) The ball valve according to claim 1 or 2, wherein the right-angled stepped portion formed on the retainer is formed such that a side surface of the annular space on the retainer side is a convex or concave annular curved surface. (4) Claims 1 to 3, wherein the right-angled stepped portion formed on the ball seat is formed such that the side surface of the annular space on the ball seat side is a convex or concave annular curved surface.
Ball valve as described. (5) An outer circumferential groove having an abutting surface is formed on the ball side of a carbon ball sheet made of carbon and a carbon compound, and one end surface of the metal ring described above is abutted against the abutting surface, and the metal ring is inserted into the outer circumferential groove. The ball valve according to any one of claims 1 to 4, which is attached by shrink fitting.