CZ136891A3 - pressure reducing valve being controlled by a plate - Google Patents

Abstract

The valve designed for being used in respirators adapted to operate exclusively in the superatmospheric pressure breathing regime is controlled by a straight stay or stays (1) immediately confining a space or cavity (8). In inoperative state where the cavity inlet is not exposed to any medium pressure, the stays (1) are tight and hold a valve (6) open until the pressurized medium has entered therethrough the cavity (8) where a superatmospheric pressure is produced consequently. Thereby the straight stay or stays (1) are bent, get shorter and release the valve (6) which cuts off the medium flow. By aspirating from the apparatus, the superatmospheric pressure in the cavity (8) drops so that the stays begin to reassume their original shape and to reopen the valve (6). The cavity (8) is air-tightly separated from the ambient atmosphere by cementing an elastic fold onto the periphery of stay (1), which fold is followed by a sealed forechamber (9) closing the entire automatic stay system and allowing the medium to be let in and out. <IMAGE>

Description

pressure-operated pressure reducing valves are used on breathing apparatuses to reduce the inlet pressure from the

lo d-uby as pulmonary fatigue savage from the bloodstream can see what is being used;

on the one hand, a single-stage beverage automatics, where a single closing stage reduces the pressure from a pressure vessel, for example from 20 to pulmonary, or a two-stage, where the first stage is a pressure vessel and the second usually a mask; This is because the lever mechanisms have limited possibilities of further simplification · Up to the following sheeting solution according to AO 250 347, where the control cam plate is one, is dipped in a gas-tight bowl by a membrane, and AO 263063 where two cam plates are placed in a gas-tight · Both systems operate exclusively in vacuum breathing apparatus, but cannot be used for positive pressure breathing mode.

Vacuum devices in case of leakage add pollutants from the environment and thus endanger the worker in concentrated toxic environment. Overpressure devices guarantee user safety in toxic environment even in case of leakage in the circuit by constant overpressure under the mask, supplied by pulmonary automatics under any breathing mode. potential leaks to the environment.

SUMMARY OF THE INVENTION

The invention is based on the solution according to AO 262 063, with the aim of reversing the function of operation and removal of the bag. 7 The solutions AO 263 068 and AO 250 347 are Curved blades in the rest position The shortest valve actuated by them, the regulation is done by creating a vacuum in the bag, which compresses the bent blades to the plane while prolonging them and opening the valve. containers, straight planks are the longest and hold the valve open.

Closure occurs when pressure is injected from the vessel and the medium flows through the open valve into the lung reduced pressure area

· ~ · Λ / ·. · Λ rg>;

; Σϋ · Γ in tcs.tr.

steru. through the third, the length of the wall and the impeller is 10 sec., and the vent flow is the overpressure flow rate, which is a csdii, ss, and * -nc;

ledia.Opštnýu decline

-? • Can you return to the plane to lengthen the eggplant, thereby opening the throttle valve 3? lal-or-ukuj-2 are nu obrodo, gas tightly sealed by a flexible spline, they can move apart and create a variable center / bag / center. To this space are plyaotšsnd attached rubber dexter * rkn, which closes the other automation system and allow connection of input and output media. The proposed overpressure solution allows the valve to be actuated, after pressure, with the difference of attachment of the foil to the valve body on the opposite side of the connection with the holder, which then forms the valve stem.

BRIEF DESCRIPTION OF THE DRAWINGS FIG.

Fig. 2 is a section A-A of Fig. 1 showing the closing of the foils on the circumference.

Fig. 3 is a cross-sectional view of the pressure reducing valve in the closed state; Fig. 4 is a cross-sectional view of the pressure reducing valve with one foil; Fig. 5 is a cross-sectional view of the pressure reducing valve;

DETAILED DESCRIPTION OF THE INVENTION

As shown in FIG. 1, the straight blades 1 are rigidly connected at point 2 and a holder 5 which is rigidly connected to the valve body 6 with the free end of the blades 1 abutting a needle 6 which is supported against the valve & seat 6, are circumferentially sealed by a corrugation and thus enclose a space with a pre-chamber 6 hermetically connected to the straight blades 1, the reduced pressure outlet for the hose 10 and the valve body k.

Claims (3)

1. A chain operated pressure reducing valve with two straight n. # 4, q 4- p ar, ·? > ·. “·, - · [<jw, 'í v-:: <-t>' · -A. , - 'r? 1λ / * · ^: \ · za rn '· *? Ro * n * · ”» Λΐί n * »· < ¹ - 4 · -' \ *. * · Jj · m. «· G 'W * j>. V.uj ': * * k'ub <a href="http://www.i> t »v ú *> * ··» Jat ti 7, .- · «>< ó mw \ *> ^ 4. j «. A wedge perpendicular to the interior between the vacuum and reduced pressure space, characterized in that the straight uprights (1) are rigidly connected at one end in the housing (2) to the bracket (3) attached to the valve body (4). 2 second free end! The planets (l) are passed through the valve (5) of the valve (S) through the space of reduced pressure. and thus delimit the space (S) gas tightly connected to the valve body (4) and the reduced pressure outlet (S) via a line (9) to the surrounding atmosphere of the sphere. 2. A pressure-operated pressure reducing valve with one foil (1) asymmetrically fixed by one end at (2) to the holder (3) to the valve body (4) and the long end abutting the needle (6) on the valve (6) between inlet (11) and reduced pressure spaces. (8), being circumferentially plastically hermetically connected to the holder (3) and thus delimiting the space (8) gas-tightly connected to the valve body (1) and the outlet of the reduced pressure of the space (8) by the pre-chamber (9) from the ambient atmosphere. 3. Pressure-operated pressure reducing valve with one of two straight blades (l) with valve action after pressure (S) operated blades (l) fastened to the valve body (4) on the opposite side of the connection (2) with the bracket (3) abutting valve / 6 / seat / 7 / ·