SU1188268A1 - Hydrant for closed watering systems - Google Patents

Description

The invention relates to land reclamation and

can be used on closed

irrigation systems to regulate

water consumption at consumers in places

the fence.

The purpose of the invention is to increase reliability by eliminating clogging of the flow ports, preventing hydraulic shocks and ensuring regulation and stabilization of water flow.

FIG. 1 representative hydrant in a closed ’’ position, abundant species; in fig. 2 - the same, in the open position.

Tidran consists of a housing 1 with a vertically located inlet pipe

2 having a saddle 3. A disc valve 4 and a diaphragm actuator 5 mounted on the stem 6 are placed inside the housing 1. The overmembrane cavity 7 is communicated through the throttle 8, having radial grooves 9 and the elastic element 10, with the inlet 2 and output 11 nozzles through a three-way valve 12 and tubes 13. Under the diaphragm actuator 5 there is a partition 14, which forms a submembrane cavity 15 above. The partition 14 has an opening

16 with spring loaded check valve

17. In the outlet pipe 11 coaxially placed the valve 18, moving and fixed in the sleeve 19.

Hydrant works as follows.

When the position of the three-way valve 12, communicating supramembrane cavity 7 through the choke 8 with the outlet 11, the water passes through the radial groove 9, pressed by the elastic element 10, into the outlet 11. Under the action of hydrostatic pressure from the bottom of the disc valve 4 begins to move slowly up, opening saddle opening

3. Water through the outlet pipe 11 is supplied to the consumer. At the initial time, through the opening 16 with a check valve 17, the submembrane cavity 15 also fills with water. When a pressure reaches sufficient to overcome the weight of the load or spring force of the check valve 17, it blocks water from entering the submembrane cavity 15, creating a pressure differential between the submembrane cavity 15 and the output cavity to the valve 18. The value of the pressure differential is not less than 0.005 MPa set by the mass of the load on the check valve & not

17 or springing it. Pressure fluctuations in the outlet pipe 11 are transmitted through the throttle 8 into the supramembrane cavity 7, which increases or decreases the pressure in it, i.e. moves the poppet valve 4 up or down, maintaining the value of the flow through the flow, the flow rate set by moving the valve 18 along the axis of the nozzle 11 in the sleeve 19, followed by fixing it.

To completely close the hydrant using a three-way valve 12, the inlet pipe 2 communicates with the supermembrane cavity 7 through the throttle 8. Water passes through the radial groove 9 pressed from the end by the elastic element into the supermembrane cavity 7. Under the action of the prevailing hydrostatic pressure on top of the membrane the actuator 5 of the disc valve 4 begins to slowly move down until the hydrant is completely locked. When this water from the submembrane cavity 15 passes into the outlet 11 through the opening 16 in the partition 14, thereby damping when closing the bore of the seat 3 with a poppet valve 4. The choke 8, which acts as a retarder to the processes of opening and closing the hydrant, helps prevent hydraulic impacts in the pressure pipeline with a wide range of pressures in it, i.e. with increasing pressure, the elastic element 10, pressing into the radial groove 9, reduces the rate of flow of water into the over-membrane cavity 7. Implementation of filling the supramembrane cavity 7 when closing the hydrant through the choke 8 and subsequent emptying when opening the hydrant through the same choke eliminates its clogging due to leaching of deposited particles with countercurrent, which increases its reliability in operation, the efficiency of the device is ensured by the fact that it allows delayed opening and closing of the poppet valve, which prevents the occurrence of water hammer. Expanded functionality of the hydrant due to the fact that its working body can be fixed in any intermediate position by moving the valve 18, and the flow can also be stabilized by introducing a partition 14 having an opening 16 with an elastic non-return valve 17. The choke holes are blocked.

1188268

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Claims (1)

HYDRANT FOR CLOSED IRRIGATION SYSTEMS, containing a housing with inlet and outlet nozzles, a stem with a disc valve and a diaphragm actuator located inside the housing, the supermembrane cavity of which is communicated by tubes with inlet and outlet nozzles, characterized in that, in order to increase reliability by eliminating clogging of the flow ports, preventing hydraulic impacts and ensuring regulation and stabilization of water flow, it is equipped with a septum located under the diaphragm actuator hermetically with a stem, with a hole in which a non-return valve is integrated, a throttle m, having a radial groove, an elastic member and a shutter movably installed and fixed in the outlet conduit. nineteen 00 OO KO 05 OO 14 1188268