SU454389A1 - Gas reducer - Google Patents

Description

one

The invention relates to systems for automatic control of pressurization of tanks emptied by pressurized gas.

Gas reducers are known, which are a housing with inlet and outlet nozzles, between which there is a seat blocked by a spring-loaded reducing valve, the stem of which interacts with the membrane sensor, which is on one side under the influence of reduced pressure, and on the other - command pressure.

The proposed gas reducer differs from the known ones in that the membrane sensing element is made in the form of an elastic tube attached to the ends and connected to the stem of the reducing valve by means of plates located but cylindrical forming its inner surface, the free ends of which alternate with hingedly mounted on the body, and the central parts are supported on the ends of the pushers, made in the form of a segment of a ring, sliding in a star-like manner relative to the rod, with a collar of which pushers, ring guides. The reducing valve is unloaded at the inlet pressure when it is fed both into the over-valve cavity and to the opposite side of the cavity of the axially movable piston that interacts with the valve stem. This increases the sensitivity of the gearbox.

FIG. 1 depicts the described gearbox, a longitudinal section; in fig. 2 is a section along A - A in FIG. one.

The reducer consists of a housing 1 with an inlet pipe 2 and an outlet pipe 3, between which saddle 4 is located, blocked by a spring-loaded spring 5 valve 6, on the collar 7 of the rod 8 of which rests the ends of the pushers 9, made in the form of ring segments sliding in star-shaped relative to the stem 8 of the annular guides 10 formed by annular grooves milled at the ends, pressed against one another and the lid 11 against the body 1 of the sleeves 12 and 13. The opposite ends of the pushers 9 rest on the central parts of the hinge prisoners pa case 1 plates 14, elastically covered by the sensitive element in the form of an elastic pipe 15 and located along its inner cylindrical forming so that their free

the ends alternate with the hinges. The thickened ends of the pipe 15 are clamped between the elements of the body, forming two cavities isolated one from the other — the command cavity 16 connected to the source of command pressure through fitting 17 and the cavity

a sensing element 18 associated with a cavity of reduced pressure through a system of channels 19 and a cavity 20 performed in the sleeve 12. In the latter there is a collar 7 of the rod 8, the continuation of which through axial drilling in the sleeve 13 goes into the cavity 21 with an axially movable piston 22 placed in it , one end of which rests on the rod 8, and on the other - under the influence of the input pressure of the working medium supplied to the cavity 21 through the nipple 23. In turn, the cavity behind the reducing valve 6 is also connected through the nipple 24 to the source ohm input pressure, which leads to a discharge valve 6 from the inlet pressure.

When the inlet pressure is supplied to the nozzle 2, the working medium is simultaneously supplied through pipes (not shown in the drawing) through fittings 23 and 24 into the cavity 21 and into the cavity behind the valve 6, balancing it with the inlet pressure. At this moment, the valve 6 is pressed against the saddle 4 by the spring 5, and there is no flow through the gearbox. To open the valve 6 into the command chamber 16, through the fitting 17, a command pressure is supplied that is perceived by an elastic sensing element (pipe) 15, which through the plates 14 and the pushers 9 transfers it to the rod 8 through the collar 7. The valve 6 opens and the reduced working medium enters the cavity to the fitting 3 and through the channels 19 and the cavity 20 enters the cavity of the sensing element 18, acting on the pipe 14 in the opposite direction caused by the command pressure. Depending on the difference between the commanded and reduced pressure, the valve 6 is moved, determining the operation of the reducer.

Subject invention

Claims (3)

1. Gas gearbox, which is a housing with inlet and outlet nozzles, between which there is a saddle, overlapped by a spring-loaded reducing valve, the stem of which interacts with a membrane sensitive element under the influence of the reduced pressure, and on the other, the command pressure, characterized in that, in order to increase the sensitivity, the membrane sensing element is designed as a fixed end in the body an elastic pipe connected to the stem of the reducing valve when knobs are located on its inner surface and are hinged at one end through one on the body, the free ends of which alternate with fixed at each end of the pipe, and the central parts of the plates rest on the ends of the pushers made in the form of segments of the ring, sliding in a star-shaped relative to the stem, with the collar of which the pushers interact, ring guides. 2. Reducer for l. 1, characterized in that the reducing valve is unloaded at the inlet pressure. 3. The gearbox according to claim 2, characterized in that, in order to transfer the unloading force to the reducing valve stem, an axially movable piston is installed in the gearbox housing, loaded on one side by the input pressure of the working medium, and on the other hand interacting with the valve stem. five nineteen lUig. one 15 il 3