SU43524A1 - Pressure regulator in steam power installation - Google Patents

Description

In the proposed controller, which serves to automatically maintain a constant steam pressure regardless of its flow rate at the places of consumption and operating using a steam servomotor whose piston is connected to a shut-off valve, this piston moves due to the piston valve inserted into the device, entering the hollow rod connecting the pistons. servomotor with shut-off valve.

In FIG. 1 shows a vertical section along the axis of the proposed controller and FIG. 2 is a side view of it.

A shut-off valve 2 and a steam servo motor are placed in the housing 1 of the device installed on the steam line, the piston 3 of which is connected to the valve common to both hollow stem 15. There is a gap between the piston and the walls of the sleeve 4, which is open at the top. At the bottom of the rod 15 and the piston 3 itself, windows 6 are made that extend under the piston 3 into chamber 5. These windows 6 can open more or less inserted inside the rod 15 by the same hollow valve 14, which,

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being permanently fastened to another piston 7, located at the bottom of the device and over which chamber 16 is formed, is piston rod 7. At the bottom of the 30 rod-14, there are also windows 9 that extend into chamber 16 above pressure 7. Protruding end of rod ( spool) 14 does not already have a channel inside it and is loaded with springs 8 (fig. 2), the tension of which is regulated by screw 12,

Fresh steam enters the device from the side of diaphragm 17 (it is placed in case of too high velocities of flowing steam, which adversely affect valve wear) and, filled with decreasing pressure through the gap between piston 3 of the servomotor and sleeve 4, chamber 5 passes into the cavity 13 of the device and then into the steam diversion network, through a check valve 2 raised to a certain height, at the same time, to the required degree, part of its pressure was lost. If the steam consumption in the network is reduced, the pressure downstream of the valve 2 rises and, passing through the channels inside both the rods 15 and 14 and through the ports 9 into the chamber 16 above the piston 7, causes the latter to descend. At the same time, the spool (rod) 14 connected to the piston 7 will lower, which will increase the opening of the windows 6, as a result of which the pressure in the chamber 5 under the piston 3 of the servomotor will decrease. And since the pressure of the fresh steam over the piston 3 remains the same, this piston will drop, together with it the valve 2 will also drop, so that the latter will let in less steam. Thus, both pistons and and 7 and their rods 15 and 14 will become new equilibrium until the next change in steam consumption.

In the event of an increase in this consumption, all the processes described will occur in the reverse order.

Since it is difficult to calculate the size of the necessary clearances between the piston 3 and the sleeve 4, the pressure required in the chamber 5 is established when the device is launched into the device by experiment through the throttle valves 10. The device is completely turned off when the valve 2 screw 11 is fixed.

The subject matter of the invention.

The pressure regulator in a steam-powered unit using a steam servomotor, the piston of which is mounted on a stem of a check valve, characterized in that, in order to control the steam in the chamber 5 placed under the piston 3 of the servomotor, the stem 15 of the check valve 2 is hollow and equipped with windows 6 that are blocked the hollow piston spool 14, which is moved in the cavities of the said stem and is integral with the piston 7, under the pressure of reducing steam and balanced by the springs 8.

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