SU548242A1 - Retractable Underground Hydrant - Google Patents

Description

one

The invention relates to agriculture, in particular to irrigation of agricultural crops, and can be used on stationary irrigation systems.

Known retractable underground hydrant installed on stationary irrigation systems. It consists of a body, a control mechanism and a hollow pull-out stand 1.

The disadvantage of this hydrant is the absence of a drain from the hydrant stack at the end of its work, which can lead to freezing of water and its discharge when working with the onset of freezing temperatures.

A hydrant is also known, including a housing mounted on the pressure pipe, a hollow retractable stand and a drain valve placed in the housing, consisting of a coaxially fixed relative to the drain in the spring-loaded diaphragm housing and the valve itself.

This hydrant is the closest to that proposed by technical support. It allows the hydrant to drain at the end of its operation.

However, water is drained both from the hydrant itself and from the pressure pipeline, which leads to significant losses of irrigation water.

The purpose of the invention is to provide automatic draining of water from the hydrant at the end of its work without draining the water from the pipeline.

This is achieved by the fact that the drain valve diaphragm is fitted with a central hole in which a check valve rigidly fixed in the lower part of the body is installed.

The drawing shows the scheme of the proposed hydrant.

The extraction underground hydrant is mounted on the irrigation pipe 1 in well 2 and consists of a body 3, a single-acting hydraulic cylinder 4, a hollow stand 5 and a return spring 6; the housing 7 of the drain valve with a membrane 8, a check valve 9, a spring 10 with a face 11; racks

12dl sprinkler and control mechanism, consisting of a check valve

13 with a control pitch 14, a ratchet mechanical mechanism 15 with a cam 16, a membrane hydraulic motor 17 with a return spring 18 and a hook 19, connecting pipes 20, 21 and 22 and a membrane mechanism 23 with a membrane 24. The cavities of the hydraulic engine and membrane mechanism are filled with oil.

When the sprinkler is inoperative, the check valve 13 is closed, the return spring 6 of the cylinder 4 tightly holds the hollow one hundred to five in contact with the membrane 8, preventing

conductive fluid flow. The pressurized fluid in line 1 presses against the membrane 24, the latter deflecting, pushes the oil through tube 21 into the submembrane cavity of the hydraulic motor 17 of the pulse counter. The counter membrane, overcoming the force on the side of the return spring 18, changes zappe 19 relative to the ratchet mechanism 15 per tooth. When the fluid pressure in the pipeline returns, the spring 18 returns the counter membrane to its initial position, pushes the oil through the tube 21 into the membrane mechanism and simultaneously rotates the ratchet wheel 15 using the hook 19, and with it the cam 16 by the angle of one tooth of the wheel. Each subsequent impulse of the pressure drop caused by overlapping the beginning of the pipeline feeding the row of sprinklers installed on it causes a shift of the ratchet mechanism, and with it the turn of the cam at one step. After a certain number of steps in the ratchet hydrant, the cam 16 will move the pins 14, opening the valve itself 13. The oil enters the cavity of the cylinder 4 through the open non-return valve 13. Overcoming the spring force 6, it overcomes the force of the spring and opens the access of the liquid to be distributed through a hundred to 12 to the spraying apparatus.

With a subsequent impulse, as the fluid in the pipeline decreases, the cam 16 will release the check valve stem, force 1 and the return spring 6 will squeeze the oil out of cylinder 4 through pipes 21 and 22 and the check valve 13 to the diaphragm mechanism 23 will move the hollow stand to 5 and wilotnite it but the bottom end of the membrane 8, as well as acting through the membrane 8 on the clamp 11, overcome the force of the spring 10 slpvogo valve n creates an annular gap

between the membrane 8 and the clan 9, thereby blocking the access of fluid to the sprinkler and allowing the discharge of residual fluid from the hydrant as a whole.

Fluid through the corns 7 is drained into a well, the bottom of which may have a special prick, and is absorbed by the soil.

At the next hydraulic impulse in the pipeline, since the non-return valve is closed, the oil pz of the membrane mechanism 23 does not enter the hollow of the cylinder 4, therefore the hollow one-hundred to 5 under the action of the spring 6 of the flesh is adjacent to the sealing membrane 8. P so until ne click on

I1TOK 14 check valve 13.

In the proposed .m hydrant, the draining of the fluid is considerably simplified and occurs only from the hydrant itself without draining from the irrigation pipeline, which reduces unproductive water consumption. In addition, at the same time a hydrant can provide liquid transit throughput.

Claims (2)

1.Avt. St. No. 424951, cl. A 01G 25/00, 1974. 2. Avt. St. jNb 403823, class A 01G 25/06, 1974, 73 27