SU459766A1 - Pressure stabilizing device in pressure pipelines - Google Patents

Description

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through taps 4, 5 and 6, the diaphragm valve 8 controls and the piping system goes to irrigation in the drain pipe 12.

By adjusting the throttling wounds 4, 5 and 6 with the diaphragm valve 8 in the cavities A and B, the hydrocylander 3 is set to the same pressure (2-3 atm), and the nozzle of the valve 2 is at rest.

When the pressure increases in the pipeline to the valve, it temporarily increases the pressure after the valve, and, consequently, in the upper hollow of the diaphragm valve 8, which causes the diaphragm 11 to move and the gap between the end of the pipeline 13 and the diaphragm 11 to decrease.

Reducing the gap increases the hydraulic resistance of the valve 8, which causes a rise in the water pressure in the cavity B of the hydraulic actuator valve. A differential pressure equal to the pressure difference in the cavity of the hydraulic actuator of the valve occurs, and the valve begins to close, increasing the throttling of the main supply pipeline 1 and thereby equalizing the pressure to the desired value in the pipeline behind the valve.

Reducing the pressure in the main pipeline to a predetermined pressure and the diaphragm 11 of the valve 8 decreases and the gap between the diaphragm and the end of the pipeline increases. The pressure in the hydraulic cavity is equalized, and the valve is stopped in a new, definite position, having resettled the main pipeline 1 to the desired value.

When the pressure decreases to the valve, the pressure behind it decreases accordingly and the diaphragm of the valve 8 rises, increasing the gap between it and the end of the pipeline 13. This causes a decrease in pressure in the cavity B of the hydraulic actuator of the valve. The resulting pressure differential causes a partial opening of the valve and the restoration of pressure behind the valve to the desired value. When the pressure drops below a predetermined pressure in the cavity B of the hydraulic actuator of the valve, it drops to a minimum, and the maximum differential pressure created between the cavities A and B of the hydraulic actuator opens the valve completely. In order to operate in the pressure regulator mode, you need to connect the system according to the scheme shown in FIG. 2

The principle of operation of the device in the controller “is similar to the mode“ after itself.

In the device (Fig. 3), throttles, a diaphragm control valve and an additional solenoid of an emergency electrical protection of a sprinkler or other devices are combined in one block.

Hydraulically actuated valve 2, manual control valve 14 and shut-off valve 16 are located in the hydrant well, and a device with an executive solenoid of emergency protection is mounted on a pivot bearing of the sprinkler.

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When the sprinkler moves to another position, the connecting pipelines are disconnected, the device together with the sprinkler is transported to another position, and the pipes are connected to the valve of another hydrant.

In this scheme, the throttling valves 4 and 5 (Fig. 1) are replaced by permanent annular throttles 4 and 5 (Fig. 3), and the throttling valve (Fig. 1) by the throttling valve 6 connected to the diaphragm valve 8 controlling the shaft 17 (Fig. 3).

In addition, the rod 17 is brought out through the sealing collar 18 and is connected to the core of the solenoid 19 (Fig. 3) in order to be able to shut off the valve and fix the seal

20in an emergency.

Manual control of the valve in the absence of a machine on the hydrant is carried out by the operator using a crane 14.

The device works in the same way as above.

Water from the supply pipe 1 (Fig. 3), the shut-off valve 16 is supplied to the device. Through the ring chokes 4 and 5, the throttling valves 6 and 21, the distribution pipe water goes to the discharge.

When the pressure in the pipeline behind the valve is: at a given level, the pressure in cavities A and B of the hydraulic valve is the same. When the pressure rises to the valve, the pressure rises slightly behind the valve as well. This pressure is transmitted to the cavity of the diaphragm valve 8 and, by raising the diaphragm 11, covers the throttling valve.

21 and opens the throttling valve 6. In this case, an iodopor is created in the device cavity in front of the HOIM 21 valve, and a pressure drop in the cavity in front of valve 6.

Since the cavities of the device are connected by the conduits 7 and 13 to the cavities of the A and B hydraulic sliders, the resulting pressure differential will begin to close the valve until the pressure behind it is restored to the specified level. When the pressure drops, the process is repeated in the reverse order.

In an emergency situation, the voltage is applied to the coil of the solenoid 19 and its measles, retracted with the aid of a brush 17, completely closes the valve 21, opens the valve 6 and is fixed in this position by embedding 20.

The pressure in front of the valve 6 is reduced to a minimum, and in front of the valve 21 it rises to a maximum and is transmitted through pipelines 7 and 13 and cavities A and B of the hydraulic actuator of the valve 2. The maximum differential pressure reliably closes the valve and thereby stops the flow of water to the sprinkler.

Subject invention

Claims (3)

1. A device that stabilizes the pressure in the pressure pipelines according to the “before itself” or “after itself” schemes with an insignificant the discharge of the transported medium, consisting of a hydraulic valve, throttling devices, an expansion valve, and a system of connecting pipelines, characterized in that, in order to stabilize the pressure: and reduce the hydraulic resistances, a hydraulically actuated control is used as a regulator By means of the diaphragm valve. 2. Device 110 p. 1, characterized in that, for the purpose of automatic control with the valve I-of-a-c and i create permeable pressure drops in; The hydraulic actuator has two synchronized two annular throttles and two throttling valves interconnected by a rod. 3. A device according to claim 1, characterized in that, in order to be able to close the MOTOR IN THE EMERGENCY, the throttling valve plugs are connected to the solenoid coil of the emergency electrical protection of the sprinkler. / 2 and 12 , 2