SU451884A1 - Pressure Regulator - Google Patents

Description

The locking and regulating devices for liquid and gas are known with the unloading devices of the locking element made in the form of a piston with a rod connected to the locking element and unloading by: - its pressure of the medium supplied under the piston.

The proposed pressure regulator contains a locking element in the form of a thin-walled tube, in which a discharge element is located, executed in the form of a piston liner fixedly mounted relative to the housing with an axis that does not limit the movement of the locking element.

This eliminates the effect of dynamic flow forces on the locking element, increasing the accuracy and reliability of the regulator.

The drawing shows the proposed controller in longitudinal section.

The pressure regulator consists of a body of a throttling body and an actuator with a cover 2.

The throttling organ consists of the lower

the cover 3, which functions as a seat, elastic fitting 4, which is mounted in the recess of the cover with screw 5 with washer 6, and valve 7, made in the form of a thin-walled pipe with windows 8 for the passage of gas, in which the float is installed

insert 9, the movement of which is limited to the axis 1O, fixed in the drive housing.

The valve 7 is connected to the membrane 11 by the rod 12 through the disks 13 and 14 and, perceiving the movement of the membrane, moves in the guide sleeves 15 and 16 having seals 17 and 18.

The high pressure cavity A at the inlet 3 of the regulator is connected to the submembrane cavity B by the pipeline 19 through the pressure reducer 2 Constant pressure.

The low pressure cavity at the outlet of the regulator is connected by pipe 21 to the supramembrane cavity B of the drive.

The regulator works as follows.

An adjustable high-pressure environment stumbles into cavity A and further, passing through window 8 into valve 7 and the variable throttling gap between the seat and valve 7, is reduced and flows into the outlet piping.

The target output pressure is set by a constant pressure downstream of the reducer in the supramembrane cavity B, in which the pressure corresponds to the pressure of the medium at the outlet of the regulator.

The sensing element of the actuator (diaphragm) monitors the pressure changes at the outlet of the regulator, making the necessary valve permutation in the event of a deviation of the output pressure from a predetermined value.,

With constant gas flow, the movable regulator system is at rest, so; as the action of forces on the output pressure on the membrane is balanced by the force from the loading: of the general pressure. In this case, the flow area of the regulator is open by an amount corresponding to the established gas flow rate.

An increase in gas flow causes a pressure drop across the regulator, which upsets the balance of forces acting on the membrane. The diaphragm under the action of pressure difference begins to move upwards and increases the gap between the seat and the valve, increasing the flow through the regulator.

The forces acting on the membrane are balanced, and the movable system of the regulator is set to a new equilibrium position corresponding to the new flow through the regulator.

When reducing the gas intake, the regulator works in reverse order.

Thus, the regulator maintains a constant pressure downstream of the regulator regardless of the change in flow through the regulator.

Subject invention

A pressure regulator comprising a housing, a throttling body with a shut-off element made in the form of a thin-walled pipe, and a diaphragm actuator, which is also so as to increase the accuracy and reliability of the controller when the dynamic forces of the controlled medium change and the inlet pressure, the discharge element is made in the form of a gagging insert, located inside the locking element and fixed-fixed with respect to the housing by means of an axis that preserves the freedom of movement of the locking element.