SU954060A2 - Control pulse generator for closed sprinkling system - Google Patents

Description

(54) COMMAND PULSE GENERATOR FOR CLOSED RAIN SYSTEMS

The invention relates to the irrigation of agricultural crops by a method of sprinkling and can be used to form command pulses in a network of closed pipelines for switching over rain apparatus using hydraulically controlled devices.

On the main auth. 762809 a command pulse generator is known that includes a housing, a hydraulically operated shut-off valve, a time-control valve with a choke, kinematically connected with an adjusting screw bimetallic plate pack, a spool valve, a drain valve, a discharge valve with a hydraulic actuator installed before the shut-off valve, which controls the cavity. connected to the housing after the locking body 1.

A disadvantage of the known generator is the complexity of operation, caused by the need to reusable add-on the position of the throttle irrigation in the time limiter to set a new value for the irrigation time. In addition, the disadvantage of the known generator is a large water leak

through the drain hole of the valve.

The purpose of the invention is to simplify operation.

This goal is achieved by the fact that a check valve is installed in series with a watering throttle in the time rest valve, and the drain hole is equipped with an adjustable sub-spring valve.

The drawing shows a schematic diagram of a command pulse generator for closed sprinkler systems.

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The generator consists of a housing 1 with a locking member 2 and a stem 3. The stem of the locking member is rigidly connected to the diaphragm 4 of the hydraulic actuator 5. The hydraulic actuator cavity can be connected through the spool distributor 6 with the conduits 7 and 8 with the discharge pipeline or the atmosphere. The cavity of the body through the pipeline 9 hydraulically 25 is connected with the cavity B of the waste valve 10. with a membrane hydraulic conduit. The time relay consists of a housing 11, a piston 12 with a membrane stem 13, throttles 14 and 15 with spring-loaded

30 non-return valves 16 and 17 with a sealing ring, a bimetallic plate pack 18, an adjusting screw 19 with a nut 20 and section;: 1 bolt chamber 21 with a membrane 22 The time relay operates with a spool valve b through a lever system with springs 23 and 2 and through pipelines 25 and 7 is hydraulically connected to the spool valve b. An adjustable drain valve 26 is provided on the body of the shut-off valve. An adjustable spring 27 is installed on the relief valve 10,

The generator works as follows. .

In the closed position of the locking member 2, the water from the operating pumping station is discharged, which eliminates the breakdown of the pump vacuum. At the same time, the water under pressure enters the spool valve b, from which pipeline 7 enters the cavity A of the hydraulic line 5. In the hydraulic drive, the area of the membrane 4 is greater than the area of the valve body 2, therefore the force generated by the set pressure of the water from the membrane side is greater than that of the stop valve the organ and the locking organ is held in a closed position. From line 7, water under pressure flows through line 25 to separation chamber 21. From pressure chamber water pressure n the membrane 22, the oil is distilled into a time relay 11, from where through the throttle 15c, the check valve 16 enters the cavity above the piston 12 and moves it to the extreme right position. In this case, the rod acts on the lever system and, overcoming the force of the spring 23, expands it. As a result of the movement of the levers, the spool valve is switched b. When switching the switch, the spool valve connects the separating chamber 21 and cavity A of the hydraulic actuator 5 with the atmosphere, as a result of which the feedthrough or generator is opened from the water pressure on the shut-off organ 2.

When the valve body 2 is in the open position, the discharge valve 10 is closed by the pressure of water through the pipeline 9 due to the force generated by the pressure of water on the hydraulic membrane with a larger area and the spring 27. At the same time, due to the forces of the spring 23, the piston 12 moves to the left side, pressing the oil back into the separation chamber 21, the return oil is pressed through the choke 14 with the check valve 17. The choke 14 is made in the form of a thread along the outer contour of the housing. The displacement time pbrshn (watering time) depends on the length of the working part of the throttle 14, adjustable screw; ohm 19 with nut 20.

Upon reaching the leftmost position of the piston 12 through the lever system, the spool valve b is switched to the initial position, at which water under pressure again enters the cavity A of the membrane hydraulic line 5, and the locking member 2 blocks the generator through passage. The water supply to the system is stopped. The waste 10 and drain 26 valves are opened.

Further, the technological process of the generator is repeated.

Claims (2)

1. Command pulse generator for closed sprinkler systems on auth. I 762809, characterized in that, in order to simplify operation, a check valve is installed in series with the watering throttle in a time relay. 2. Generator according to claim 1, characterized in that, for the purpose. save irrigation water, the drain hole is equipped with an adjustable spring-loaded valve. Sources of information taken into account in the examination 1. USSR author's certificate W 762809, cl. A 01 G 25/06, 1979. Smb j CSpoc 2 G 1 ... t