JPS63106972U

JPS63106972U -

Info

Publication number: JPS63106972U
Application number: JP20385686U
Authority: JP
Priority date: 1986-12-26
Filing date: 1986-12-26
Publication date: 1988-07-11

Description

[Brief explanation of the drawing]

第１図は本考案を二床式バタフライ弁に適用し
た要部断面の正面図、第２図は同じく左側面図、
第３図は出力軸と駆動軸間に筒継手を介設して連
結する態様を示す斜視図、第４図は筒継手の展開
図、第５図乃至第１０図は弁体の位置に対する筒
継手、出力軸、駆動軸の作動状態を示す説明図、
第１１図および第１２図は筒継手の他の実施例を
示す図である。１…バタフライ弁、２…弁箱、４…弁軸、５…
弁体、７…開閉機台、８…ギヤケース、１０…開
閉機、１１…出力軸、１２…主動ベベルギヤ、１
３…従動ベベルギヤ、１４…垂直軸、１５…中間
軸、１８…ウエイトアーム、１９…ウエイト、２
１…ロツク装置、２２…ロツク解除装置、２６…
駆動軸、２６Ａ…キー、２７，２７Ａ…筒継手、
３０…カム溝、３１，３２…ピン（摺動部材）、
Ｓ…緊急遮断装置。 Figure 1 is a front view of a cross section of the main part of the invention applied to a two-bed butterfly valve, Figure 2 is a left side view,
Fig. 3 is a perspective view showing a mode in which a cylinder joint is interposed between the output shaft and the drive shaft to connect the cylinder joint, Fig. 4 is a developed view of the cylinder joint, and Figures 5 to 10 show the cylinder relative to the position of the valve body. Explanatory diagram showing the operating status of the joint, output shaft, and drive shaft,
FIGS. 11 and 12 are views showing other embodiments of the cylindrical joint. 1...Butterfly valve, 2...Valve box, 4...Valve shaft, 5...
Valve body, 7... Switching machine base, 8... Gear case, 10... Switching machine, 11... Output shaft, 12... Drive bevel gear, 1
3... Driven bevel gear, 14... Vertical shaft, 15... Intermediate shaft, 18... Weight arm, 19... Weight, 2
1...Lock device, 22...Lock release device, 26...
Drive shaft, 26A...key, 27, 27A...tube joint,
30...Cam groove, 31, 32...Pin (sliding member),
S...Emergency cutoff device.

Claims

[Scope of Claim for Utility Model Registration] (1) In a butterfly valve that opens and closes a pipeline by rotating the valve body together with the valve shaft, a gear case is mounted on a switchgear base provided above a valve box in which the valve body is housed. A vertical shaft is provided that passes through the gear case with a horizontal output shaft, and extends below the opening/closing machine base via a driven bevel gear that meshes with a driving bevel gear that is pivotally attached to the output shaft in the gear case. The valve shaft is connected to the vertical shaft, while a closing device is provided on one side of the output shaft to apply a biasing force to the valve body in the direction of closing the valve body, and a closing device is provided on one side of the output shaft to keep the valve body in the open state. An emergency shutoff device is provided, which includes a locking device for holding the valve, and a unlocking device for unlocking the locking device in an emergency, and on the other side of the output shaft, the valve body returns to the open state after the valve is closed. Install an opening/closing machine,
A cylindrical joint is interposed between the drive shaft of the opening/closing machine and the output shaft, which is inclined at a predetermined angle in the longitudinal direction of the shaft and has a cam groove formed through it in the circumferential direction with a length equal to or longer than the opening/closing angle of the valve body. The sliding members provided on the output shaft and the drive shaft are engaged with the cam groove of the cylinder joint, and the drive shaft is made to have play in the rotational direction and to be able to slide in the axial direction. An emergency shutoff device for a valve body, characterized by: (2) The cylindrical joint in which the cam groove is formed is provided integrally with either the output shaft or the drive shaft, and the sliding member provided on either the output shaft or the drive shaft is connected to the cam. An emergency shutoff device for a valve body as set forth in claim 1 of the utility model registration, characterized in that the device engages with a groove.