SU1269109A1 - Amplifier for self-actuated gas pressure regulator - Google Patents

Abstract

This invention relates to automatic regulation and can be applied in gas industry to control gas pressure. The aim of the invention is to increase the sensitivity of speed and the expansion of the range of output pressures. The amplifier comprises a housing in which the output pressure chambers, the control pressure and the supply pressure are located, the reference assembly with a spring and a reference screw, a spring-loaded double channel resting on the saddle. The comparison element is made in the form of a hollow piston, a cover and a flat metal membrane sandwiched between them, the rigid center of which, on the one hand, is connected to the spring of the task assembly and, on the other hand, via a hollow rod having a discharge channel, to a spring-loaded double valve. The area of the hollow i piston is made equal to the effective area of the membrane in its neutral SL position. The use of a membrane in combination with a piston allows it to be used for movements that are unattainable for a single membrane, which makes it possible to expand the range of output pressures. 1 cl. to o; UD

Description

The invention relates to automatic control and can be applied in the gas industry to regulate gas pressure,

The aim of the invention is to increase the sensitivity of speed and the expansion of the range of output pressures.

The drawing shows an amplifier for an indirect gas pressure regulator.

The amplifier contains a housing 1, in which the chambers of the outlet pressure 2, the control pressure 3 and the supply pressure 4 are located, the reference unit with the spring 5 and the reference screw 6, a spring-loaded double valve 7, resting on the seat 8. Comparison element (combined membrane-piston sensitive element ) is made in the form of a hollow piston 9, a cover 10 and a flat metal membrane 11 sandwiched between them, the rigid center of which is connected on one side with the spring 5 of the job site and, on the other hand, through the hollow rod 12 having a discharge channel 13, with a spring loaded a war valve 7, and the area of the hollow piston 9 is made equal to the effective area of the membrane 11 in its neutral position.

The amplifier for the gas pressure regulator indirectly operates as follows.

In the initial position, the gas pressure at the outlet (in chamber 2) is equal to a predetermined one, while the membrane-piston sensing element is installed in such a position that the valve 7 rests on the seat 8 and simultaneously closes the channel 13 of the hollow rod 12, separating the chambers 2-4. The pressure in the chamber 3 of the control pressure is kept constant, corresponding to the gas flow through the regulator at the moment. With increasing pressure at the outlet of the regulator (in the outlet pressure chamber 2), the membrane 11 and the associated hollow rod 12 move upward, communicating the control pressure chamber 3 through the discharge channel 13 with the outlet pressure chamber 2. The control pressure 'decreases, causing the shutter to move the shutter of the actuator of the regulator in the closing direction.

When the pressure in the outlet pressure chamber decreases, the membrane 11 with the hollow stem 12 moves downward, blocking the discharge channel 13, while the chamber 3 is disconnected from the chamber

2, and the spring-loaded double valve 7, departing from the seat 8, connects the control pressure chamber to the supply pressure chamber and thus changes the magnitude of the control signal. Inertial objects are characterized by slow processes, and in this case, small displacements of the membrane are quite enough to control the actuator. For objects where deep and sharp disturbances at the output of the object are possible, the movement of the membrane 11 is not enough and the hollow piston 9 comes into operation, which sharply increases the rate of change of the control signal ”

Claims (1)

The invention relates to automatic regulation and can be applied in gas industry to control gas pressure. The aim of the invention is to increase the sensitivity of speed and the expansion of the range of output dj. The drawing shows an amplifier for an indirect-action gas pressure regulator. The amplifier includes a housing 1 in which the chambers of the outlet pressure 2, control pressure 3 and supply pressure 4 are located, the spring reference unit 5 and the task screw 6, a spring-loaded double valve 7 supported on the saddle 8. Comparison element (combined membrane-piston sensitive element ) made in the form of a hollow piston 9, a strut 10 and a flat metal membrane 11 sandwiched between them, the hard center of which, on the one hand, is connected to the spring 5 of the task assembly, and on the other through the rod 12, having a discharge channel 13, to a spring-loaded double valve 7, and the area of the hollow piston 9 is equal to the effective area of the membrane 11 in its neutral position. The booster for the indirect-action gas pressure regulator operates as follows. In the initial position, the gas pressure at the outlet (in chamber 2) is equal to the preset one, while the membrane-piston sensing element is set in such a position that the valve 7 rests on the saddle 8 and simultaneously closes the channel 13 of the hollow rod 12, the section of the chamber 2-4 . The pressure in the control chamber 3 is kept constant, corresponding to the flow rate of gas through the controller at the moment. With increasing pressure at the outlet of the regulator (in the outlet pressure chamber 2), membrane 11 and the hollow rod 12 connected with it move upward, communicating the control pressure chamber 3 through the discharge channel 13 with the outlet pressure chamber 2. The control pressure is reduced, causing the actuator of the regulator to move in the direction of closure. When the pressure in the outlet pressure chamber 2 decreases, the membrane 11 with the hollow stem 12 moves down, blocking the discharge channel 13, the chamber 3 being disconnected from the chamber 2, and the spring-loaded double valve 7, departing from the seat 8, connects the pressure regulating chamber 3 to the pressure chamber power and thus changes the value of the control signal. For inertial objects, slowly proceeding processes are characteristic, and in this case, quite small displacements of the membrane are enough to control the actuator. For objects where deep and sharp disturbances are possible at the output of the object, the displacement of the membrane 11 is not enough and a hollow piston 9 comes in, dramatically increasing the rate of change of the control signal. Invention Amplifier for an indirect pressure gas regulator, comprising a housing in which output, control pressure and supply pressure chambers, reference node, reference element and spring-loaded double valve, characterized in that, with the aim of increasing sensitivity, speed and expansion and the output pressure range, the comparison element is located in the output pressure chamber and is made in the form of a hollow piston with a membrane installed in it, the hard center of which is connected on one side with the spring of the task unit and on the other hand through the spring rod - with a spring-loaded double valve, and the area of the hollow piston is made equal to the effective area of the membrane in its neutral position.