SU1764579A1 - Draw-out hydrant - Google Patents

Abstract

A retractable hydrant is agricultural, in particular irrigation, and can be used for irrigating agricultural crops from closed pressure pipelines. The purpose of the invention is to simplify the design of the engine return the retractable hydrant to its original position and ensure trouble-free operation of the engine, regardless of the presence in the water of mechanical and organic particles, salts. The extendable hydrant includes a telescopic four-piece case, hermetically connected to the supply pipeline, equipped with a spiral plate spring motor, in which the outer part of the spiral spring (one turn) slides along the needles of the needle bearing, the other layers slide one over the other. Engine forces are communicated to the upper section of the hydrant by cable transmission through a system of rollers.

Description

The invention relates to the field of agriculture and can be used for watering agricultural crops from closed pressure pipelines.

Known retractable hydrant (a. P. USSR № 1382447, A 01 G 25/06,1988), including a telescopic body mounted on the pipeline, the lower section of which is fixed to the discharge pipe, the upper section has a water outlet with a valve, each section of the telescopic body is equipped ring magnets installed in the lower parts, opposite stripes facing each other, and the valve is provided with a spring-loaded piston rod.

The disadvantage of this device is that the use of magnets as a means of returning sections to the initial position leads to the creation of a short hydrant intended for surface irrigation, the valve spring is in an aggressive environment - it is short-lived.

Known retractable hydrant (application N 4676482 / 30-15-052688, a positive decision from 10.27.89 is a prototype) in which a hydraulic engine is placed on the lower part of the fixed section from the outside - a high-pressure annular tank filled with air water is supplied. Compressed air is the backbone of the hydraulic engine. The stationary section has a bent tube, the lower part of which is placed under the bottom of the tank, and the upper section through the opening in the inner wall of the hydraulic motor communicates with the cavity formed by the lower stationary section and the first movable section of the hydrant. The first, second and third sections in the upper part have calibrated holes for ejecting water from the cavities between the sections when the hydrant extends into the working position after

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supplying pressure to the network and for transmitting the force upon returning the hydrant sections to the initial position.

The disadvantage of the hydrant is that calibrated holes require for clean up of water free from mechanical impurities to avoid clogging, pre-cleaning requires a complex filter system.

The aim of the invention is to simplify the design of the returning hydrant returning engine to the initial position and to ensure trouble-free operation of the engine regardless of the presence of mechanical impurities, organic particles, salts in the water.

The goal is achieved by supplying an automatic retractable sprinkler hydrant with a spiral plate spring motor.

FIG. 1 shows the circuit diagram of the device. The device contains a retractable hydrant 1, in which a spiral plate spring engine 2 is hermetically sealed on the lower part of the lower fixed section 5, the plate spring spring 18 of which, during watering, as the hydrant is removed, pressures the water to the upper working position to maximize compression. The outer part of the coil spring (one turn) slides along the needles of the needle-shaped bearing 21, the other layers slide one over the other, smeared with neutral oil, with which the ring capacity of the engine into which the spring is placed is filled to the top.

FIG. 2 shows a spiral plate spring motor, section A-A.

The extendable hydrant has a telescopic body 1, which includes a stationary section 5, rigidly, hermetically connected by means of a funnel 6 with a supply line 7, four movable coaxially mounted sections 8-11; limiters 19, contributing to the formation of working cavities between sections, pneumatic shut-off valve 15, which is installed in the upper movable section of the hydrant to regulate the supply of water to the sprinkler and the sprinkler 16 of circular action on the lid of the fourth movable section. Inside this section, a valve 14 is installed to regulate the supply of water to the cover of the casing 17 to soften the soil before the hydrant comes out and to clean the casing from the soil at the beginning of the irrigation. Outside, the fourth movable section of the hydrant and the spring engine are equipped with a system of blocks 4 for tensioning the cable 12 for transmitting the force to the pu 20 of the engine spring and to

pivot point on the spring motor cover. The tightness of the device is provided by cuff-seals 13 (1, 2, 3, 4, 5, 6, 7) mounted on the movable sections at both ends of the cylinders at the lower fixed section 5 in the upper part, at the fourth movable section 11 in the lower part of the cylinder .

The retractable telescopic automatic hydrant works as follows: after receiving a command to start irrigation after opening the hydraulic shutter when the pressure in the supply line 7 is increased, water exerts increasing pressure on the bottom of the fourth 11 section of the hydrant, as a result of which the sections of the hydrant move from the initial position to the upper standard position In this case, when the pressure in the cavity of the hydrant reaches half the maximum, pneumatic valve 15 opens the water supply hole to the sprinkler, which ensures the start of the sprinkling process. When a level close to the maximum pressure is reached, the hydrant sections are pulled out for a full working radius, the fourth section 11, being moved to the upper position through the system of blocks 4, pulls the cable 12, while transmitting the force on the spring of the spring 20, cocks the spring spiral in working position (for maximum force).

At the end of irrigation, the team closes the hydraulic lock, relieves the pressure in the hydrant cavity, which leads to a reduction in the engine spring and the return to the initial position of the hydrant section cables under pressure, and the water is pushed out of the hydrant cavity through the sprinkler channel. When the pressure in the supply line drops to half, the valve for supplying water to the sprinkler closes. The remainder of the pressure is removed by discharging the remaining water through the water supply valve to the casing cover.

The advantage of the proposed technical solution in comparison with the prototypes is that this device, like the prototype, ensures the automation of irrigation guarantees trouble-free operation regardless of whether there is sand or organic matter in the water, since special water purification is not required to ensure the operation of the engine spring. .

Claims (4)

1. A retractable hydrant containing those lescopic casing, the bottom stationary on the section of which is hermetically connected to the supply pipeline and on it is installed a motor having an annular a bone, and on the upper section a sprinkler is installed under the hood cover, characterized in that. in order to simplify the design and increase reliability, it is equipped with a needle bearing installed in its lower section, and the engine is made in the form of a spiral leaf spring placed in an annular container, which is filled with oil, while the outer part of the spiral spring is mounted for movement and interaction with sliding surfaces of needle bearing needles. 2, Hydrant pop, 1, characterized in that the upper mobile section is provided with five wife two tension rollers and a control cable. 3. Hydrant pop. 1, characterized in that the outer coil spring is provided with guide rollers for transmitting the force of the coiled leaf spring. 4. Hydrant pop. 1, characterized in that it is provided with a cable transfer of force from the spiral plate spring through the tension rollers of the lower fixed and upper movable sections to the fulcrum located on the engine cover. u 15g Phie.1 2