WO1985004937A1

WO1985004937A1 - Valve of automatic pilots

Info

Publication number: WO1985004937A1
Application number: PCT/BR1985/000004
Authority: WO
Inventors: Karoly Karvaly
Original assignee: Karoly Karvaly
Priority date: 1984-04-24
Filing date: 1985-03-19
Publication date: 1985-11-07
Also published as: BR6400590U; EP0180589A1

Abstract

The valve of automatic pilots operates exclusively in pendency, and in proportional relation to the manometric (static) pressure dominant in the tubulation. The valve of automatic pilots operates in a zone - pre-established - of the manometric (static) pressure and functions as either the highest or the lowest limiter of all the manometric (static) pressures originating from the fluid in the tubulation. The valve of automatic pilots satisfies all the requirements of safety, preventing the occurrence of overpressure or the consequent rupture of the tubulation as well as obstructing the flux in case of considerable leakage.

Description

VALVE OF AUTOMATIC PILOTS

Description of the model of VALVE of AUTOMATIC PILOTS destined for use in industrial tubulation against high pressure anή/or rupture (in case there were excessive alteration, in the pre-established operative pressure).

This paper refers to the model of the VALVE of AUTOMATIC PILOTS of command utilizing the energy of the fluid proper (whether compressible or not) to maintain the function: Being the First Pilot - drafts 1 and 2 - to serve to limit the maximum pressure of the function and the Second Pilot - drafts 3 and 4 - to limit the lowest (minimum) pressure during the operation. The VALVE of AUTOMATIC PILOTS, besides operating as independent units, commands all valves of fluid equipped with "castles" and diaphragms for the dynamic pressure, i.e., with auxiliary circuits, "bypasses", with either fixed or varied orifices for the fluid in the "castle". Of the four drafts annexed, 1 and 2 show the cross-section of the VALVE of AUTOMATIC PILOTS destined to limiting the highest pressure in the tubulation, while drafts 3 and 4 illustrate the VALVE of AUTOMATIC PILOTS limiting the lowest pressure in the tubulation.

All PILOTS close and block the flux at once - without any auxiliary energy - when the pressure increases or diminishes overpassing the pre- established limit - be they the uppermost or the lowermost in the tubulation.

Intending to simplify the present description of the VALVE of AUTOMATIC PILOTS, draft 1 shows the OPEN position when in high pressure - the maximum pressure pre-established for operation - and draft 2 illustrates the CLOSED position of the same PILOT when the pressure in the tubulation reaches the pre-established estimate during the operation.

The draft 3 shows the OPEN position of the Pilot at LOW PRESSURE - the minimum limit of .the operation - while draft 4 illustrates the CLOSED Pilot Valve when the pressure in the tubulation is lowered beyond the pre-established level, such as in case of rupture.

The VALVE of AUTOMATIC PILOTS consisis of: main body (fig. 1), superior cap (fig.2), inferior cap (fig.3) and diaphragm (fig.4) — exposed only to static (manometric) pressure — being the diaphragm (fig. 4) destined to transfer the load of the manometric pressure from the tubulation to the piston (fig.5) equipped with a synthetic rubber cone (fig.6) either to close or to liberate the flux of fluid through the orifice (fig.16). The piston proper (fig.5) is yet equipped with two "O- Ring" (fig.15; in order to avoid that the fluid - when the PILOT is open - passes to the free recipient (fig.17) of the piston, thus that the fluid passes only through the entry (fig.13), chamber (fig.7) and exit (fig.14), when the pressure in the tubulation is between the pre- established minimum and maximum. In the upper part of the piston, which operates as a central axis, there is a chamber (fig.7), with an inferior disc (fig.8) of the spring (fig.9).

This spring leans against the upper disc (fig.10), which is equipped with two guides (fig.11) in the upper cap (fig.2) , eliminating the eventual alterations of modular elasticity ("G") tangential of the spring when the same oscillates within the limit of the precalculated flexion.

In order to regulate and/or vary the flexion of the spring, the screw-threaded shaft (fig.12) moves gyrating downwards, increasing the force (mechanical — pressure) of the spring against the load (manometric pressure X surface cm²) of the diaphragm originating from the tubulation.

The VALVE of AUTOMATIC PILOTS in function, is to limit the HIGH PRESSURE (drafts 1 and 2); the manometric (static) pressure of the tubulation when reaching the pre-established uppermost limit; the diaphragm (fig.4) receives the pressure via orifice (fig.18) transforming it to load (surface x kg) dislocating the piston (fig.5) together with the cone (fig.6) thus closing the flux of fluid in the orifice (fig.16), shutting of the flux between the entry (fig.13) and the exit (fig.14). The function of the VALVE of AUTOMATIC PILOTS to limit the lower pressure (drafts 3 and 4 ) :

Identical, though the manometric (static) pressure in the tubulation lowers (beyond the pre-established limit) the cone (fig.6) leans against the top of the orifice (fig.16), impending further flux; in general, in the latter case, this would happen only rupture or considerable leakage should occur.

Claims

C LA I M S

1. The VALVE of AUTOMATIC PILOTS is characterized by one UNIQUE CHAMBER in the line of DYNAMIC pressure.

2. The VALVE of AUTOMATIC PILOTS, in accordance with the claim 1, is characterized by one UNIQUE DIAPHRAGM which is exposed only to manometric (static) pressure dominant in the line of tubulation.

3. The VALVE of AUTOMATIC PILOTS, in accordance with the claims 1 and 2, is characterized by one UNIQUE PISTON to obstruct or liberate the flux.

4. The VALVE of AUTOMATIC PILOTS, in accordance with the claims 1, 2 and 3, is characterized by one UNIQUE SPRING with pre-established flexion, and, proportional to the correspondent manometric pressure of the tubulation.