JPH0443773U

JPH0443773U -

Info

Publication number: JPH0443773U
Application number: JP8350190U
Authority: JP
Priority date: 1990-08-06
Filing date: 1990-08-06
Publication date: 1992-04-14
Anticipated expiration: 2005-08-06
Also published as: JP2537395Y2

Description

[Brief explanation of the drawing]

第１図は本考案に係るサービスバルブの縦断側
面図、第２図〜第４図は弁杆のオネジと弁室のメ
ネジとの螺合関係を示す部分断面図である。１……弁座、２……流体導入口、３……弁室、
４……メネジ、５……上部開口、６……流体送出
口、７……試験用開口、８……弁本体、１０……
弁体、１１……オネジ、１２……Ｏリング、１３
……弁杆、１４……頭部外周縁、１５……凹溝、
１６……有端リング、１７……カシメ絞り。 FIG. 1 is a longitudinal sectional side view of a service valve according to the present invention, and FIGS. 2 to 4 are partial sectional views showing the screwing relationship between the male thread of the valve stem and the female thread of the valve chamber. 1...Valve seat, 2...Fluid inlet, 3...Valve chamber,
4...Female thread, 5...Top opening, 6...Fluid delivery port, 7...Test opening, 8...Valve body, 10...
Valve body, 11...Male thread, 12...O ring, 13
... Valve rod, 14 ... Head outer periphery, 15 ... Concave groove,
16... Ended ring, 17... Caulking aperture.

Claims

[Scope of utility model registration request]

A fluid inlet with a valve seat at the upper end is arranged below, the upper part of the valve seat is used as a valve chamber, and a female thread is formed on the inner peripheral surface thereof, and an upper opening is provided above the valve chamber. In the valve chamber of the valve body, which has a fluid outlet and a test opening arranged on the upper side, a valve body is provided at the lower end, a male screw is screwed into the female screw in the central body, and the upper part is provided on the upper outer periphery. A valve stem equipped with an O-ring that presses against the inner circumferential wall of the opening is screwed together, a groove is provided on the inner circumferential wall of the upper opening above the valve stem, and an end ring is provided in the groove, and the upper end of the upper opening is provided with a groove. In a service valve with a caulked peripheral edge, the end ring was pushed up on the outer periphery of the head of the valve rod as the valve rod rotated and came off the concave groove, and the O-ring reached the position of the concave groove of the end ring. In this state, the male thread of the valve stem and the female thread of the valve chamber are partially screwed together, and when the valve stem is rotated and further raised, the valve stem becomes idling and the valve stem becomes loose. A service valve for a room cooler in which the positions and lengths of the female thread of the valve chamber and the male thread of the valve rod are set so that the outer peripheral edge of the head does not come into contact with the lower end of the caulking aperture of the upper opening.