JPS6418678U

JPS6418678U -

Info

Publication number: JPS6418678U
Application number: JP11256287U
Authority: JP
Priority date: 1987-07-24
Filing date: 1987-07-24
Publication date: 1989-01-30
Anticipated expiration: 2002-07-24
Also published as: JPH0642146Y2

Description

[Brief explanation of the drawing]

第１図は、本考案の１実施例による安全弁のデ
イスクを示す一部の拡大断面図、第２図は、本考
案が改良を対象としている典型的な安全弁の例を
示す縦断面図、第３図は、そのデイスクの１例を
示す部分拡大断面図、第４図は、デイスクの他の
例を示す部分拡大断面図、第５図は、第４図に示
すデイスクの安全弁の吹き出し時の流出流体の流
れ状態を示す模型図である。５……弁座、５_０……弁座面、２０……デイス
ク、２１……デイスク本体、２１_０……底面、２
２……サーマル・デイスク、２２_０……環状シー
ル部分、２３，２４……環状段部。 FIG. 1 is a partially enlarged cross-sectional view showing a disc of a safety valve according to an embodiment of the present invention; FIG. 2 is a longitudinal cross-sectional view showing an example of a typical safety valve to be improved by the present invention; 3 is a partially enlarged sectional view showing one example of the disk, FIG. 4 is a partially enlarged sectional view showing another example of the disk, and FIG. 5 is a view of the disk shown in FIG. 4 when the safety valve is blown out. It is a model diagram showing the flow state of outflow fluid. 5... Valve seat, 5 ₀ ... Valve seat surface, 20... Disc, 21... Disk body, 21 ₀ ... Bottom surface, 2
2... Thermal disk, 22 ₀ ... Annular seal portion, 23, 24... Annular stepped portion.

Claims

[Claims for Utility Model Registration] 1. A main body 2 arranged in alignment on a vertical axis;
Consisting of a main body cover 3 and a spring box 4, inside the main body 2 there is a substantially cylindrical valve seat 5 and an annular seal portion ₂₂₀ that cooperates with the valve seat surface ₅₀ at the top thereof. A substantially cylindrical disk 20 having a lower surface penetrates the main body cover 3 and the spring box 4 in the vertical axis direction, and the upper portion is inserted into the spring box 4 so that the lower end presses the disk 20 onto the valve seat surface ₅₀ . A safety valve consists of a valve stem 8 pressed by a spring 9, and a disc 20 is formed from a conical bottom surface ₂₁₀ . An _annular step 23 is formed inside the bottom surface 21 of the main body _21. An annular step 24 is formed at a location smaller than the inner diameter d of the valve seat 5, and the bottom surface ₂₁₀ is connected to the annular seal portion ₂₂₀ of the thermal disk 22 and the annular step 23. , 24 to form a substantially continuous surface. 2. The safety valve according to claim 1, wherein the disk 20 comprises a main body 21 and a separate thermal disk 22 surrounding the main body 21. 3. The safety valve according to claim 1, wherein the disk 20 is composed of a main body 21 and a thermal disk 22 that surrounds the main body 21 and is integral with the main body 21.