JPS6340683U

JPS6340683U -

Info

Publication number: JPS6340683U
Application number: JP13254986U
Authority: JP
Priority date: 1986-08-29
Filing date: 1986-08-29
Publication date: 1988-03-16

Description

[Brief explanation of drawings]

第１図は本考案の実施例を示す縦断面図、第２
図は別の実施例を示す縦断面図、第３図は従来例
を示す縦断面図、第４図は第３図Ａ部の拡大断面
図である。１……弁体、１１……第１パツキン、２，３…
…弁箱、１２……パツキン押え、６……グランド
フランジ、１３……弁棒、７……ボンネツトフラ
ンジ、１４……軸穴、８……ガイド部、１５……
鍔、１０……ボンネツト、１６……操作穴、１８
……第２パツキン、２１……段部、１９……ボン
ネツト下端面、２６……皿バネ。 Fig. 1 is a vertical sectional view showing an embodiment of the present invention;
The figure is a longitudinal sectional view showing another embodiment, FIG. 3 is a longitudinal sectional view showing a conventional example, and FIG. 4 is an enlarged sectional view of section A in FIG. 3. 1... Valve body, 11... First seal, 2, 3...
... Valve box, 12 ... Seal holder, 6 ... Grand flange, 13 ... Valve stem, 7 ... Bonnet flange, 14 ... Shaft hole, 8 ... Guide part, 15 ...
Tsuba, 10...Bonnet, 16...Operation hole, 18
...Second packing, 21...Step part, 19...Bonnet lower end surface, 26...Disc spring.

Claims

[Claims for Utility Model Registration] 1. A valve body that can open and close fluid by rotating 90 degrees is provided in a valve box with a sealing mechanism, and has a shaft hole in the upper end surface of the operating hole in the valve box. A bonnet is fixed, and a valve stem that engages with the valve body is rotatably inserted into an axial hole of the bonnet, wherein a first packing is provided in the upper part of the bonnet and contacts the outer periphery of the valve stem, and A second packing is provided which is engaged with the lower end surface of the valve stem, and a collar is provided at the lower part of the valve stem which is larger than the shaft hole of the bonnet and whose upper surface is engaged with the lower end surface of the second packing. A packing holder is provided at a position that engages with the outer periphery of the valve stem, and by tightening the packing holder, a first packing at the top of the bonnet is pressed, and a second packing at the bottom of the bonnet is pressed by a collar provided on the valve stem. A valve having a bonnet characterized by: 2. A valve having a bonnet according to claim 1, characterized in that an elastic member is interposed between the upper part of the first packing and the packing retainer. 3. A valve having a bonnet according to claim 1 or 2, wherein an elastic member is interposed between the lower end face of the bonnet and the second packing. 4. A valve having a bonnet according to claims 1 to 3, wherein the lower end surface of the bonnet is inserted into an operation hole provided on the upper surface side of the valve box. 5. A valve having a bonnet as set forth in claims 1 to 4, which is a registered utility model, wherein the seal retainer is engaged with a male thread formed on the upper outer periphery of the valve stem.