SU976909A1 - Program apparatus hydraulic drive - Google Patents

Description

(54) HYDRAULIC DRIVE OF SOFTWARE

one

The invention relates to the field of agricultural irrigation and is intended for stand-alone water distribution devices with local software control.

Known hydraulic actuator control hydraulic valves closed irrigation systems, including a software disk with a drive mechanism in the form of an impeller, which interacts with the hydraulic distribution valves 1.

A disadvantage of the hydraulic drive of this device is the complexity of the design, since it requires a reduction gearbox.

A hydraulic actuator for maneuvering hydraulic locks is also known, including a supply pressure pipe, a chamber with a water pipe and a disk membrane with a stem connected through a throttling filling unit to the pressure pipe, and a siphon 2.

The disadvantage of this drive is the inaccuracy of the time intervals between the switch shifts due to the absence of the DEVICE

in the filling unit of the threshold element, which sharply increases the water supply at a certain filling of the chamber.

The purpose of the invention is to improve the quality of irrigation by increasing the accuracy of time intervals.

This goal is achieved by the fact that the filling unit is designed as a series-connected low-pressure stabilizer, an intermediate chamber with a throttling hole and an accumulating

10 tanks equipped with an inlet float valve.

FIG. 1 shows the drive, general view; in fig. 2a is a plot of pressure fluctuations in the device versus -OUT time; in FIG. 2, b - the diagram of oscillations of oscillations versus time.

The actuator contains a pressure supply line 1 connecting the main pipeline 2 with a filling unit consisting of a stabilizer 3 of reduced pressure, a tube 4 of the intermediate chamber 5 with a valve 6 with a rod 7, and also a float locking device with a float 8 having a rod 7 and a calibrated hole 9 connecting the chamber 5 s

cumulative capacity 10 having a pipe 11 with an air discharge valve 12 containing a calibrated orifice 13; the storage tank also contains a disc membrane 14 with a stem 15 and a siphon 16 having an outlet to the distribution pipes 17 and 18 through valves 19 and 20, with the siphon ridge located below the air release valve by the value of AH.

The device works as follows.

Water from the main pipeline 2 enters the stabilizer 3 of reduced pressure through the pressure pipe 1, then through the supply pipe 4 into the chamber 5 and through the calibrated opening 9 into the storage tank 10 and during the time O-1 (Fig. 2) it will fill it up to a certain the level from which the float 8 starts to float under the action of the buoyancy force of water and opens the valve 6, with the result that water will flow into the storage tank 10 with a large flow rate, which will correspond to a sharp increase in pressure and movement of the disk membrane from ohm up, the valve 12 around its axis povernuvschis upward pressure from below will release the air from the container; when the pressure in the tank reaches a value that exceeds the crest of the siphon on the АН after a time of 1-2, the siphon will charge and will start working with a hollow section, discharging water into one of the inactive distribution pipelines. For example, at 18, through valve 20, the flow rate of water consumed by the siphon will be greater than the flow rate of flow, with the result that the pressure in the tank will drop to 2-3 in time 2-3, and the membrane will drop to its zero mark, after which there is some surge in vacuum over time (3–4), as a result of which valve 6 drops and blocks the flow of water into the storage tank; then the siphon flow rate will be determined as O. ",. + d, where QoTB is the flow rate of water entering through the calibrated orifice from the chamber; Q - siphon flow rate, numerically equal to the flow rate of incoming air through the calibrated orifice 13; this emptying cycle will continue for a time 5-6, after which the siphon in connection with the complete emptying will capture air and discharge, then a new cycle of filling the tank will start during the time O-1, the pressure build-up with the siphon discharge 1-2 a drop in pressure to atmospheric 2–3, a surge in vacuum over time 3–4 and an emptying of capacity 5–6, etc.

The effectiveness of the design lies in the fact that when applying the proposed hydraulic drive, the force from the disc membrane diaphragm without any intermediate kinematic links will be removed by a basic software disk or by any other device that after a given number of cycles will move the corresponding contacts or valves, after which the signal will relevant working bodies (valves, valves in sprinklers or on pipelines of a closed irrigation network).

The proposed hydro-acting device also allows, by selecting calibrated holes and the volume of the storage capacity, to extend the time between individual cycles to several hours or more, depending on the duration of the program being compiled, which ultimately reduces the design and simplifies operation. In addition, the device can also be used on an open irrigation network when constructing water outlets with local software control.

Claims (2)

1. USSR author's certificate number 496021, cl. A 01 G 25/06, 1973. 2. USSR author's certificate number 537165, cl. E 02 B 13/02, 1973. a P 2