SU76926A1 - Device for remote control of valves - Google Patents

Description

Devices are known for the stationary control of valves using hydraulic servomotors associated with valves and controlled by means of distribution spools.

The aim of the invention is to automate the remote control of valves according to a predetermined time schedule.

The drawing shows a diagram of a hydraulic device for digital valve control designed to automate the control of a recovery unit.

The device consists of three sections for controlling the switching of the valve-to adsorber to the recovery unit. The first section controls the inlet valves of the water vapor to the outlet of the heat recovery unit, the second section controls the inlet valves of the steam into the heater and the third through the inlet valves of the vapor-air mixture and the exhaust.

Every the section consists of a double piston spool /, rearranged by auxiliary servomotors 2 and 3 of one-way action. The servomotor shtacks are aligned with the spool rolling pins. The servomotors operate under the action of a predetermined head of fluid accumulating in a reservoir made in the form of a vertical section of pipe 4.

In the spool cylinder there is a system of openings, which, during the reciprocating movement of the spool, are reported by the cylinders 5 of the valves of the adsorber 6 alternately with running water and sewage.

The reciprocating movement of the spool takes place under the pressure of water flowing into the cylinder of the servomotor 2 from the water mains 7 under pressure or into the cylinder of the servomotor 3 from the constant level control valve with a free PLUM.

The displacement of the piston of the servomotor 2 under pressure of water from the water supply system begins as the gas analyzer 8 sends an electric pulse to the solenoid valve 9. The valve opens access to water from the line 7 to 10 and 11 and further under the piston of the servo motor 2. After moving the piston, the water goes to the sewer through the hole M and the pipe 12.

The solenoid valve 9 is energized for several minutes, which is required to complete more than a written process. Then the current is interrupted, the valve 9 is closed, and ab539

The valve 13 communicates the pipe 10 with the atmosphere.

Under the piston of the servomotor 3, water flows continuously from the tank 15 through the pipe 4, and the valve 14 is installed. Until the hole And is not blocked by the piston, the water freely goes through this hole into the sewer system. After closing the opening H, the water begins to accumulate in the aerial section of pipe 4. The accumulation of water continues until its level reaches a height sufficient to create the force required to move the pump 3 of the servomotor 3 and, consequently, the valve / in the opposite direction. This height is established empirically, and the time it reaches is controlled by the degree of opening of the valve 14.

The position of the controllable valves is signaled as follows.

For each cycle, an amount of water equal to the volume of the piston stroke is ejected from the non-working cavity of the servomotor. This water is directed to reservoir 16, the volume of which is slightly larger than the volume of incoming water.

In the tank, a pollava 17 is mounted, carrying a J8 brush. The upper end of the rod is hingedly connected to the ratchet -mechanism. A pointer 19 is mounted on the roller of this mechanism, on which the inscriptions are made: "open," closed, and t. P. When water enters, the cut, the air 16 float 17 pops up, and the ratchets turn the pointer 19, and the corresponding inscription appears - in the slot control board. To return the float 17 to its original position after moving the gauge, the reservoir 16 is connected through the throttle hole 20 to the drain channel.

Subject invention

Claims (7)

1. A device for remote control of valves using hydraulic servomotors coupled to valves and controlled by distributing spools, characterized in that, in order to automatic control of valves according to a predetermined time schedule, permutation of spools is performed by auxiliary servomotors operating under the action of a predetermined liquid head created by accumulating it in the reservoir for a period of time equal to the cycle time of the spool. 2. The form of the device according to claim 1, characterized in that, in order to maintain a constant accumulation time of the liquid in the reservoir to a predetermined level, the liquid is supplied under a constant hood. 3. The form of the device according to claim 1, clause 4 and partly with the fact that the ends of the rollers of the spools are conjugated with the syringes of the auxiliary drives, which are single-acting servomotors located coaxially with the spool at both ends of the rollers. 4. The form of the device according to claim 1, characterized in that the reservoir for the accumulation of liquid is made in the form of a vertical section of the inlet pipe. 5. A device according to claim I, characterized in that to implement the positioning of the controlled valves, the volume of fluid displaced from the non-working cavity of the hydraulic valve servomotor and directed to the reservoir 16 with the float 17 connected through the ratchet gear is used. with a pointer. 6. The form of the device according to claim 5, from l to h with the fact that to return the float to its original position after moving the pointer, the reservoir 16 through the throttle opening is connected to the drained channel. 7. The device according to p. 1-6, characterized in that in case of its use. In chemical production, where the process is controlled by a gas analyzer, an electromagnetic edge is used, controlled by a gas analyzer: and opening the supply of liquid under pressure to one of the auxiliary servomotors, controlling, 1 spool.