SU1550491A1 - Direct-acting liquid pressure regulator - Google Patents

Abstract

This invention relates to control technology without auxiliary energy sources. The purpose of the invention is to improve the quality and ensure the stable operation of the fluid pressure control system. In the regulator, there are additionally installed two membranes 7 and 8, forming containers 12 and 13. Through fitting 10, the working medium is fed directly into containers 16 and 13 and through a variable choke 11 into container 12, which is also connected to the bellows 14 with a spring 15. Device allows to improve the quality of pressure stabilization in transient conditions. 1 il.

Description

(21) 4347257 / 24-24

(22) 21.J2.87

(46) 03/15/90. Bul Number 10

(71) Krasnodar Polytechnic Institute

(72) V.I. Pugachev

(53) 621.646.4 (083.8)

(56) USSR Copyright Certificate No. 1072010, cl. G 05 D 16/06, 1980.

Automatic devices, controllers and control machines / Ed. B.D. Kokarsky, Reference Guide, L .: Mashinostroenie, 1968, p. 348-350, fig. VI.2.

(54) DIRECT ACTION FLUID PRESSURE REGULATOR

(57) The invention relates to a control technique without auxiliary energy sources. The purpose of the invention is to improve the quality and ensure the stable operation of the fluid pressure control system. In the regulator, there are additionally installed two membranes 7 and 8, forming containers 12 and 13. Through fitting 10, the working medium is fed directly into containers 16 and 13 and through a variable choke 11 into container 12, which is also connected to the bellows 14 with a spring 15. Device allows to improve the quality of pressure stabilization in transient conditions. 1 Fig.

This invention relates to control technology without auxiliary energy sources.

The purpose of the invention is to improve the quality and ensure the stable operation of the fluid pressure control system.

The drawing is a schematic of a fluid pressure regulator.

The regulator consists of a housing 1 with inlet and outlet nozzles with a saddle 2, a regulating element 3, a stem 4, a setting unit 5, a spring setting 6, diaphragms with a rigid center 7-9, a fitting of the input channel 10, alternating throttle 11, a membrane unit, forming the capacitance 12 and 13, the bellows 14 and the spring 15, forming a variable capacitance. The membrane unit consists of loose membranes with large and small rigid centers. Between the membrane 7 and the housing is the capacity of 16.

In the process of control, the pressure of the fluid is supplied through the nozzle 10 to the membrane 7 into the container 13, which is formed by membranes with large and small centers, through an adjustable choke And into the container 12, which is formed by membranes with large and small centers, and a spring-loaded bellows. 3 steady-state forces on the stem from the pressure in the containers 12 and) 3 mutually balance each other, BECAUSE they form on the same effective areas and are directed towards each other. In this case, each pressure value will correspond to a certain position of the regulator stem, since the force created by the pressure on the membrane 7 is balanced by the force developed by the spring setting 6. In

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A transient mode causes an additional force on the rod from the now varying pressures in containers 12 and 13. For example, increasing the controlled pressure at the first moment will have a force on the rod exceeding that developed on the membrane 7, since the pressure in the tank 13 will increase. the same as the membrane 7, and in the vessel 12 - afterfeneHHo due to the presence of throttles and variable capacity. The pressure difference between capacitances 12 and 13 will be all the greater, jjeM changes the controlled pressure more quickly and, therefore, the force on the current from the additional membrane junction will be proportional to the output from the controlled value. | The present invention improves the Quality of pressure stabilization in transient modes, which provides an improvement in the flow of those technological processes where the regulators are installed. The use of this regulator in some cases eliminates the need for the use of indirect regulators, which provides an economic effect.

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Claims (1)

Invention Formula A direct-acting fluid pressure regulator, comprising a pipeline with an inlet and an outlet, between which a saddle is installed, a housing with a diaphragm with a rigid center, connected to the tuning unit and through a rod with a valve, and an inlet channel characterized in that In order to ensure stability and improve the quality of regulating the regulator coaxially with the main membrane, two membranes with rigid centers are installed, forming a membrane unit, the first and second outer membranes having a larger effective area than the average The migrant, variable choke and variable capacitance are made in the form of a bellows, spring-loaded to the body, and the inlet nozzle is connected directly to the chambers formed by the first extreme membrane and the body and the second extreme membrane and middle membrane, and through a variable choke - to the chamber formed the first extreme membrane and middle membrane, and also this chamber is connected to force 16 13 Number 15 .l. CCL-CHA-