RU2330404C1 - Water outlet of flexible spraydown pipeline - Google Patents

Abstract

FIELD: agriculture.

SUBSTANCE: water outlet includes the gate which opens inside the pipeline. The gate is a traveling valve, which consists of cone shut-off head located in the body. The cone shut-off head is connected to the cylindrical body with an elastic perforated diaphragm which is set inside of the pipeline above the water outlet port and blocks its lead-in edge. The calibrated orifices are made full-circle of the bug diameter of the valve cylindrical body in the diaphragm, the total flow area of the calibrated orifices corresponds to preset flow through the water outlet. The cone shut-off head is fixed with the orbicular retainer outside of the body. The water outlet port in the pipeline has the cone shape.

EFFECT: providing preset flow along the whole pipeline.

2 dwg

Description

The invention relates to techniques for irrigation of crops using the drip method using flexible irrigation pipelines.

A water outlet of an irrigation pipeline is known, including a housing with a drain hole and a fastener connecting the housing to the pipeline, the housing being formed by two sidewalls connected by a vault consisting of a front horizontal part and a rear curved horizontal part smoothly conjugated with it directed outwardly, while the outlet hole of the housing is placed in it opposite the rear curvilinear part of the arch, and the fasteners are made in the form of a plate placed on the inside of the pipe water and connected to its last body by means of screws made flush, while the plate is equipped with a protrusion with an oblique cut located behind the inlet (SU 1501981 A1, 08.23.89).

Disadvantages of the water outlet are limited functionality, difficulty of installation, poor quality of irrigation.

A water outlet with a flexible conduit is known, including an elastic casing installed in the wall and attached to the edges of the water outlet, one of which is bent into the pipeline from its outer side, the elastic casing is made in the shape of a tube (SU 378592 A1, 04/18/1973).

The disadvantages of the outlet are limited functionality, low reliability.

Known water outlet, made in the form of a piston installed in a hole in the pipeline, equipped with a porous element that overlaps the pipeline hole and pressed against the piston, for example, using a rigid plate connected with it. (SU 471094 A1, 05/25/1975).

The disadvantages of this outlet are limited functionality, low operational reliability, lack of ability to control the water supply.

A valve is known for sprinkling and the like devices with a body and an elastic locking element overlapping the holes in the saddle, on which a central protrusion is formed, and an elastic elastic locking element in the form of a flat plate is attached to it, forming gaps with the walls of the housing (SU 360498 A1 , 11/28/1972).

The disadvantages of the valve include limited functionality, the lack of the possibility of a regulated water supply, depending on the actual pressure.

A well-known water outlet of the irrigation pipeline, comprising a corrugated pipe and a piston for reinforcing the hole, is provided with an elastic perforated membrane located under the pipe (SU 261015 A1, 01/06/1970).

The disadvantages of the outlet include the difficulty of maintaining a given flow rate, since significant pressure is required to overcome the resistance of the membrane fixed in the piston along its entire perimeter. In addition, the movement of the corrugated pipe requires manual adjustment, which greatly complicates the operating conditions and reduces the reliability of the outlet.

Known exhaust valve to a flexible supply pipe, including a locking element attached to the inner walls of the pipeline and opening inside the pipeline, while the locking element is made of elastic and attached to the walls of the pipeline by perforated along the edges of the diaphragm (SU 394493 A1, 08/22/1973).

The disadvantages of the water outlet valve are the complexity of the design when the perforated diaphragm is fixed to the pipe walls, the low probability of an adjustable water supply, since the diaphragm is fixed to the pipe walls along the entire perimeter, and the locking element can only be moved when the diaphragm walls break. In addition, flow control with a flat shut-off element is difficult.

This valve is accepted as the closest analogue.

The invention consists in the following.

The problem to which the invention is directed, is to increase the operational reliability and the possibility of a controlled water supply.

The technical result achieved by the implementation of this invention is to provide a given flow rate along the entire length of the irrigation pipeline and to simplify the design.

The specified technical result is achieved by the fact that the outlet of the flexible irrigation pipe, including a locking element that opens inside the pipeline, according to the invention is a movable valve consisting of a conical locking head located in a housing made in a covering bandage pipe, which is fixed above the water outlet with lock, while the conical locking head is connected by a cylindrical body with an elastic-elastic perforated diaphragm located inside water outlet pipe above the opening and the closure of its front edge, the diaphragm has rounded edges, and its diameter is D = 1,4d _BX, where d _BX - diameter of the inlet edge water outlet openings circumferentially larger diameter of the cylindrical valve body in the diaphragm formed calibrated holes, the total the cross-section of which corresponds to a given flow rate through the outlet, the conical locking head is fixed outside the housing with a ball stop, the water outlet in the pipeline is made conical, and its input one edge has a rounded radius R = 0.8d _H , where d _H is the outer diameter of the water outlet.

The invention is illustrated by drawings, where figure 1 shows a longitudinal section of an irrigation pipeline with a water outlet under reduced pressure in the pipeline; figure 2 is the same with increased pressure in the pipeline.

Information confirming the possibility of implementing this invention are as follows.

A water outlet, including a locking element that opens inside the pipeline, is placed on the wall of the pipeline 1 with a band 2, which is fixed above the water outlet with a lock 3. Under the water outlet in the band there is a cone 4 with a conical opening, inside which a conical locking head 5 is placed. The conical locking head 5 is connected by a cylindrical body 6 with an elastic-elastic perforated diaphragm 7, in which calibrated holes 8 are made, arranged around a circle, diameter, large shim the diameter of the cylindrical body 6. The total flow cross-section calibrated holes corresponds to a predetermined flow rate through the overflow. The conical locking head 5 is fixed from the outer part of the housing 4 by a ball stop 9. The water outlet in the pipeline 1 is made conical, having a decrease in diameter to the outer surface of the pipeline.

The inner inlet edge of the outlet is rounded with a radius of R = 0.8 d _H , where d _H is the outer diameter of the outlet.

The diaphragm has rounded edges, and its diameter is D = 1.4d _BX , where d _BX is the diameter of the inlet edge of the water outlet.

The outlet works as follows.

With reduced pressure inside the pipeline 1 (Fig. 1), the diaphragm 7 is in the free position and rests on the inner wall of the pipeline 1, while the openings 8 freely pass the predetermined flow rate, the water flows through the conical opening of the housing 4 to the ball stop 9 and is evenly distributed over the surface the soil.

With increased pressure (figure 2), the diaphragm 7 bends, while the holes 8 are deformed, their flow area decreases, and therefore the flow rate is reduced. At the same time, the diaphragm 7 through the cylindrical body 6 moves the locking head 5 and the flow area of the conical hole in the housing 4 is reduced, which causes a decrease in flow rate, since the flow rate depends on the pressure head according to the flow equation

where μ is the flow coefficient;

ω is the living area;

g is the acceleration of gravity;

N is the effective pressure.

The analysis of this equation in relation to the developed design of the water outlet shows that with a reduced pressure (Fig. 1), the living cross-sectional area is larger and, accordingly, the possibility of increased flow increases, however, the acting pressure is not enough for this. With increased pressure (Fig. 2), the living cross-sectional area decreases, which means that the possibility of supplying a given flow rate decreases, but increased pressure increases this possibility.

Thus, the water outlet will provide a given flow rate regardless of the pressure head, i.e. along the entire length of the irrigation pipeline.

Claims (1)

A water outlet of a flexible irrigation pipe, including a locking element opening inside the pipeline, characterized in that the water outlet is a movable valve consisting of a conical locking head located in a housing made in a brace covering the pipeline, which is fixed above the water outlet with a lock, while the conical locking head is connected by a cylindrical body with an elastic-elastic perforated diaphragm located inside the pipeline above the water outlet m and overlapping its front edge, the diaphragm has rounded edges, and its diameter is D = 1,4d _{BX, BX} where d - diameter of the inlet edge of the water outlet openings on the circumference of greater diameter of the cylindrical valve body are made in the diaphragm calibrated orifice, the total flow cross-section which corresponds to a given flow rate through a water outlet, a conical locking head is fixed on the outside of the housing by a ball stop, the water outlet in the pipeline is conical, and its inlet edge is radially rounded y _N R = 0,8d, where d _H - outer diameter water outlet openings.

Images