SU1211388A2 - Hydrant - Google Patents

Description

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The invention relates to agriculture, in particular to irrigation, and can be used on automatic closed irrigation systems.

The purpose of the invention is to provide the possibility of dosing irrigation water at fluctuations in its pressure in the supply network.

The drawing shows a hydrant diagram.,:,

The hydrant contains a hrd pipe 1, a chamber 2 formed by a diaphragm 3 with a hard center 4 and a key 5 to which the stop ring 6 is attached and the hollow rod 7,

Above the lid 5, an autonomous hydrant control system is installed, comprising an upper tank 8 with a needle valve 9 mounted for vertical movement in a calibrated orifice 10; the middle tank 11, located on the hinge support 12 and equipped with a counterweight 13, the tank 11 is made with an opening 14 equipped with a float valve 15, has a discharge pipe 1 6 with a throttle 17 and a diaphragm 18 with a rigid center to which is attached a flexible ball 19 on the flexible connection 19 the valve 20, which overlaps the saddle 21 in the tube 22 with the hole 23 and the valve 24, the outlet 25 through the tube 26, the diffuser 27 and the tube 28 communicates with the sub-diaphragm cavity of the average tank 11,

The lower container has an upper cavity 29 communicated with the lower cavity 30 by an opening with a float valve 31, the lower cavity is formed by a septum 32 and a diaphragm actuator 33, the subdiaphragmatic cavity 34 of which is connected to the inlet nozzle 1 by the rod 7, and the supra-aphragm tube 35 is connected to the upper capacity eight,

Hydrant works as follows.

When water is supplied, its pressure in the inlet is increased. Through the gap between the rigid center 4 of the diaphragm 3 and the rod 7, water enters the chamber 2 and acts on the diaphragm actuator 3, Since the diaphragm actuator area is larger than the inlet pipe area, the hydrostatic pressure force acting on the diaphragm actuator from above is larger.

113882

which ensures that the hydrant is in the closed position.

Through the hollow core 7, the water enters the cavity 34, acts on

5, the diaphragm seal 33 and displaces the liquid from the cavity 30 through the tube 35 into the upper container 8,

The position of the needle 9 in the gap 10 sets the time after the end of 10

the hydrant must turn on in

five

work After a predetermined time has elapsed, the liquid from the container 8 is drained into the container 11, which turns around the support 12, the valve opens

5 24 and the water from chamber 2 through line 28 is discharged to the outlet. The pressure in chamber 2 drops. Under the action of water pressure in the inlet pipe 1, the diaphragm 3 of the hydrant rises, and the water supply to the consumer begins. At this time, from the container 11, the liquid flows through the calibrated opening 14 through the tube 16 into the container 29 under the action of excess

5 water pressure at the inlet. The valve 15 is closed. The time it takes for the liquid to be drawn from the tank 11 depends on the pressure acting on the diaphragm fy 18 from below. This pressure is proportional to the pressure of water in the inlet: the higher the water pressure, the greater its flow through the hydrant and through the throttle 17, and the emptying time of the tank 11, respectively, is shorter.

The flow rate of the hydrant and the flow rate of the liquid flowing through the choke 17 from the tank 11 are proportional and determined by calculation.

Q The fluid displacement bram from the tank 11 determines the operating time of the hydrant and is determined by the average flow and volume of the water supply. When water pressure changes, flow rate changes.

j hydrant and fluid displacement time. from the tank 11. With an increase in the hydrant water consumption above the average, the hydrant operation time decreases, and the volume of water supply calculated by the average flow rate will be constant.

Thus, a constant volume is issued to the consumer.

water.

When all the liquid is squeezed out of the container 11, the hard center of the diaphragm 18 will take the uppermost position and the ball valve 20 will close.

The water from under the diaphragm 18 is discharged through the tube 26 under the action of the weight of the hard center of the diaphragm 18 and the suction force of the diffuser 27 into the outlet nozzle 25. The water pressure on the bottom of the ball valve 20 is greater than the water pressure under the diaphragm 18, the valve 20 remains in the closed position . When emptying the container 11, it returns to its original position. Anti-Compiler E. Popova Editor N. Kishtulinets Tehred I. Astalosh Corrector A. Tsko

Order 618/36 Circulation 642 Subscription VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Branch PPP Patent, Uzhgorod, st. Project, 4

23 close11388

weight 13, valve.

The pressure in cavity 2 rises and the hydrant closes.

When pressure is removed in the inlet, the diaphragm 33 is lowered and the fluid from the cavity 29 through the float valve 31 merges into the diaphragm - cavity 30. The migrant is ready for the next watering cycle.

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Claims (1)

HYDRANT by author St. No. 1143801, characterized in that, in order to ensure the possibility of dosing irrigation water with pressure fluctuations in the supply network, the average capacity of the autonomous control system is equipped with a floating valve and a diaphragm with a rigid center and communicated with the hydrant inlet through a valve connected by a flexible connection with the rigid center of the specified diaphragm, and with the output- ^ through the diffuser. , 1211388