SU729412A1

SU729412A1 - Safety membrane device

Info

Publication number: SU729412A1
Application number: SU782625113A
Authority: SU
Inventors: Николай Иванович Блинов
Original assignee: Предприятие П/Я А-7114
Priority date: 1978-06-08
Filing date: 1978-06-08
Publication date: 1980-04-25

Description

1one

:1зобретение касаетс арматуростроени и может найти применение в област х техники , где используютс газы высокого давлени .A: The invention relates to valves and can be used in the fields of engineering where high pressure gases are used.

Известно предохранительное устройство, в котором между двум последовательно ус- , тановленными мембранами, образующими замкнутый объем, установлен шток, разрушающий при повышении давлени в емкости верхнюю мембрану, после чего разрушаетс нижн 1.A safety device is known in which between two successively installed membranes forming a closed volume, a rod is installed, which destroys the upper membrane with increasing pressure in the vessel, after which the bottom 1 is destroyed.

К недостаткам известного устройства от- 10 носитс то, что его невозможно пересматривать на другое давление без демонтаже.The disadvantage of the known device is the fact that it cannot be revised to another pressure without dismantling.

Известен предохранительный клапан, в котором разрывна мембрана установлена между корпусом и крышкой, ст нутых разрывным болтом 2.A safety valve is known in which a rupture disc is installed between the housing and the lid, collapsed by a rupture bolt 2.

Недостатком известного клапана вл етс низка точность срабатывани .A disadvantage of the known valve is the low response accuracy.

Цель изобретени - расширение диапазона контролируемых давлений.20The purpose of the invention is to expand the range of controlled pressures.

Это достигаетс тем, что устройство снабжено дополнительной опорной мембраной, образующей с внутренней полостью крышки замкнутый объем и штоком., расположенным между мембранами, торцовые поверхности которого вл ютс опорами мембран, причем давление газа в замкнуто.м объеме во столько раз больше рабочего давлени , во сколько раз площадь разрывной мембраны больше площади опорной мембраны.This is achieved by the fact that the device is equipped with an additional supporting membrane, which forms a closed volume and a stem with an internal cavity of the lid. The diaphragm is located between the membranes, the end surfaces of which are membrane supports, and the gas pressure in the closed volume is so many times the working pressure. how many times the area of the bursting membrane is larger than the area of the supporting membrane.

На чертеже приведена схема устройства.The drawing shows a diagram of the device.

Claims

The safety membrane device consists of a housing 1 with an input plug 2 and an output 3, a lid 4 with a fitting 5, in which a valve 6 with a spring 7 is located. A support membrane 8 is installed between the housing 1 and the cover 4 and forms with its inner surface a closed volume 9, moreover, the pressure of the gas injected into volume 9 exceeds the working pressure by as many times as the area of the bursting membrane 10 installed from the inlet nozzle is larger than the area of the supporting membrane 8. Between the supporting 8 and the bursting 10 membranes a rod 11 is installed, the end surfaces of which are membrane supports. The rupture disc 10 is welded to the flare of fitting 2. The volume 9 is the valve adjustment cavity. After gas injection is closed by the valve 6 under the action of gas and spring 7. The device works as follows. When the pressure rises, the rupture membrane 10 bends and pushes the rod 11, which cuts off during movement supporting membrane 8. Gas from volume 9 is discharged through nozzle 3, equilibrium is disturbed, and rod 11 moves further into volume 9. Membrane 10, without support, is broken and working pressure through nozzle 3 is discharged to atmosphere. Claims of the invention A safety membrane device in a casing equipped with a lid is ruptured by a rupture membrane, characterized in that, in order to expand the range controlled by pressure, it is provided with an additional supporting membrane forming a closed volume from the lid internal cavity and a stem located between the membranes the end surfaces of which are membrane supports: the gas pressure in a closed volume is so many times the working pressure, how many times the area of the bursting membrane more than the area of the supporting membrane. Sources of information taken into account during the examination 1. USSR author's certificate No. 479922, cl. F 16 K 17/14, 1972.

2. USSR author's certificate number 246229, cl. F 16 K 17/16, 1968.