JPS6135276U

JPS6135276U - Shuttle valve for loading arm with emergency actuation device

Info

Publication number: JPS6135276U
Application number: JP11963584U
Authority: JP
Inventors: 博吉田; 祥一竹石
Original assignee: 日本エムコ・ウイ−トン株式会社
Priority date: 1984-08-03
Filing date: 1984-08-03
Publication date: 1986-03-04

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は本考案によるしゃ断弁の縦断面図、第２図はし
ゃ断弁を開閉するためのパイロット弁スプールの、ケー
シイグヘッドより突出する上端に取りつけられた操作握
りとストッパーからなる安全装置を示す部分縦断面図、
第３図は第２図の装置の部分平面図、第４図は第３図の
装置を矢印■の方向より見た部分側面図、第５図はしゃ
断弁とマンホールの密閉装置を有するドロップパイプの
縦断面図、第６図は第５図と異なる断面で示すしゃ断弁
とドロップパイプの部分縦断面図、第７図は本考案のし
ゃ断弁を有するローデングアームの全体図である。１５，１５ａ・・・・・・ドロップパイプ、３２・・・
・・・弁ケーシング、３２ａ・・・・・・入口、３２ｂ
・・・・・・出口、３４ａ・・・・・・シリンダ、３６
・・・・・・弁体、４０・・・・・・中空ピストン、４
１・・・・・・ばね、４２・・・・・・貫通孔、４４，
４５・・・・・・ケーシングヘッド、４６・・・・・・
案内部分、４８・・・・・・パイロット弁スプール、５
０・・・・・・グイヤムラム弁、５１・・・・・・ばね
、５６・・・・・・軸方向通路、６４・・・・・・半径
方向孔、８０，８２，８４．８６・・・・・・
絞り部、８９，９０・・・・・・第一通孔、９４，９６
・・・・・悌二通孔。Fig. 1 is a longitudinal sectional view of the shutoff valve according to the present invention, and Fig. 2 shows a safety device consisting of an operating grip and a stopper attached to the upper end of the pilot valve spool protruding from the casing head for opening and closing the shutoff valve. A partial longitudinal sectional view showing,
Fig. 3 is a partial plan view of the device shown in Fig. 2, Fig. 4 is a partial side view of the device shown in Fig. 3 seen from the direction of arrow ■, and Fig. 5 is a drop pipe with a shutoff valve and a manhole sealing device. 6 is a partial vertical sectional view of a cutoff valve and a drop pipe shown in a different cross section from FIG. 5, and FIG. 7 is an overall view of a loading arm having a cutoff valve of the present invention. 15, 15a...Drop pipe, 32...
...Valve casing, 32a...Inlet, 32b
...Exit, 34a...Cylinder, 36
... Valve body, 40 ... Hollow piston, 4
1... Spring, 42... Through hole, 44,
45... Casing head, 46...
Guide part, 48...Pilot valve spool, 5
0... Guyamram valve, 51... Spring, 56... Axial passage, 64... Radial hole, 80, 82, 84.86...・・・・・・
Squeezed portion, 89, 90...First through hole, 94, 96
・・・・Tei 2 through hole.

Claims

[Scope of utility model registration request]

A valve casing having an inlet and an outlet, a hollow piston having a valve body biased to permanently close the outlet by a spring and capable of sliding within the valve casing cylinder, and a through hole in the peripheral wall of the hollow piston. , a bypass passage having a larger cross-sectional area than the through hole and opening on the exit side, and an emergency actuation device, the emergency actuation device being constantly biased upward by a spring in an action chamber formed in the casing head. a diaphragm valve energized to a diaphragm valve, and a first passage communicating on the one hand with a lower chamber delimited by the diaphragm valve and on the other hand opening into a constriction of the passage downstream of the shutoff valve;
A shutoff valve for a loading arm, which is connected to a lower chamber delimited by a diaphragm valve on the one hand, and a second through hole opening to the outside at a predetermined level in a drop pipe downstream of the shutoff valve on the other hand, is located at the center of the casing head. A pilot valve spool is provided that is slidably guided within the valve casing, the upper end of the pilot valve spool is fixed to the center of the diaphragm valve, and the lower end of the pilot valve spool penetrates the lower end of the hollow piston and protrudes to the outside. As passages, an axial passage of a predetermined length is provided in the pilot valve spool so as to open at its lower end, and a radial hole is provided in the casing head guide part, and the cross-sectional area of these bypass passages is A loading arm characterized in that the cross-sectional area of the through hole in the peripheral wall of the hollow piston is larger than that of the through hole, and the radial hole is positioned so as to communicate with the axial passage of the pilot valve spool only when the pilot valve spool moves in one direction. Shutoff valve.