RU2417845C1 - Rain-generating device of sprinkling machine - Google Patents

Abstract

FIELD: agriculture.

SUBSTANCE: invention relates to agriculture and may be used in sprinkling irrigation, mostly in sprinkling far-reaching machines that operate in motion. The sprinkling nozzle (1) of the rain-generating device is equipped with a throttling element (5). It is made in the form of a double-chamber hollow body with inlet (10) and outlet (11) chambers of identical cross section. Between the chambers there is a partition (12) with holes (13). On the partition (12) in the conical diffuser of the sprinkling nozzle there is a truncated cone installed (14) with provided central angle α=13-15° and with the possibility of axial displacement.

EFFECT: making it possible to adjust the flow and pressure of irrigation water, simplified design.

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Description

The invention relates to agriculture and can be used for sprinkling irrigation, mainly in wide-sprinkler sprinklers operating in motion.

Known sprinkler nozzles of the sector type, comprising a housing with a longitudinal passage channel made in the form of a confuser passing into a cylindrical calibrated hole, a deflector with a reflective surface made in the form of an ellipsoid surface with an internal recess [1].

The number of sprinkler nozzles installed on the spans of the Kuban machine is different. For example, DN-6.0 is mounted on 1 span, starting from the numbers of fittings from the 3rd to the 14th; DN-6.5 - on the 1st flight from the 15th to the 20th, on the 11th - from the 2nd to the 19th and on 111 - from the 2nd to the 14th; DN-7.0 - on the 11th span from the 1st to the 20th, on 111 - from the 1.15th to the 19th, on 1V, V and V1 - from the 1st to the 20th.

A disadvantage of the known sprinkler nozzles is the limited technological use due to the impossibility of ensuring a low flow rate of irrigation water at high pressure in the pressure pipe, especially in its initial section.

Known short-jet sprinkler nozzle containing a housing with a longitudinal passage channel made in the form of a confuser passing into a cylindrical calibrated hole, a deflector with a reflective surface made in the form of an ellipsoid surface with an internal recess, the height of the calibrated cylindrical hole is selected less than 0.5d, and the angle between tangent to the surface of the internal recess at the points of intersection with the body of the deflector is selected equal to 155-160 °, while the distance from the top of the cone of the confuser to the plane fluid confluence is (3,3-3,6) d, and to the point of the reflecting surface of the deflector is equal to (2,2-2,3) d, where d - diameter of the cylindrical calibrated holes [2].

Irrigation water from the water supply line of the sprinkler machine enters the nozzle passage channel under the pressure necessary to ensure a given flow rate and the required quality of the rain formed. When moving along a conical confuser, the water flow, gradually compressing, increases its speed to a maximum in front of the calibrated hole and with the highest kinetic energy, the water flow hits the reflective surface of the deflector, changes the direction of movement, and decays into separate streams and drops, turns into artificial rain distributed on the surface of the irrigated area.

A disadvantage of the known short-jet irrigation nozzle is the limited technological use due to the impossibility of reducing the diameter of the calibrated hole to less than ⌀2.5 mm under the conditions of irrigation water treatment, and also because of the impossibility of ensuring a low flow rate of irrigation water at high pressure in the pressure pipe, especially in its initial section.

The aim of the invention is to expand the technological capabilities of the rain-forming device with increased pressure of irrigation water in the pressure pipe.

This goal is achieved by the fact that in a rain-forming device comprising a short-jet sprinkler nozzle containing a body with a longitudinal passage channel made in the form of a confuser passing into a cylindrical calibrated hole, a deflector with a reflective surface made in the form of an ellipsoid surface with an internal recess, an irrigation nozzle equipped with a throttling element made in the form of a two-chamber hollow body with inlet and outlet chambers of the same cross section, inter a partition which is placed with the openings, and the partition in a conical converging tube sprinkler nozzle set made truncated cone with a central angle α = 13 ° and with the possibility of axial displacement.

Comparative analysis with the prototype shows that the claimed water intake device meets the criterion of "Novelty", as it has differences from the prototype.

1. The rain forming device is equipped with a throttling element.

2. The throttling element is made in the form of a two-chamber hollow body with inlet and outlet chambers of the same cross section.

3. Between the input and output chambers of the throttling element, a partition is made.

4. The partition is made with holes.

5. The holes are made in a partition with a diameter of not more than 2.5 mm.

6. A truncated cone is mounted on the bulkhead in the throttle body.

7. The truncated cone is made with a central angle α - 13-15 °.

8. The truncated cone on the partition is mounted with the possibility of axial displacement.

9. A short-jet sprinkler nozzle is installed on the throttle element.

10. The truncated cone on the partition of the throttling element is installed in the conical confuser of the sprinkler nozzle.

11. The sprinkler nozzle is installed with the possibility of changing the gap between the surfaces of the confuser and the truncated cone of the throttling element.

In order to reduce the pressure (pressure) of irrigation water in the inlet chamber of the short-jet sprinkler nozzle, the rain-forming device is equipped with a throttling element. The working pressure of irrigation water in the pressure pipe, as well as before the sprinkler nozzle (selected for the prototype) is at least 0.4 ... 0.6 MPa.

Sprinkler nozzles used in wide-sprinkler sprinkler machines are made with various calibrated holes.

The pressure of the irrigation water in the pipeline of the wide-angle machine decreases with distance from the fixed support. Sprinkler nozzles are installed on a water supply pipe with a smaller diameter of the calibrated hole near the fixed support and with an increase in the diameter of the calibrated hole, respectively, with increasing distance from the fixed support.

The design of the known short-jet sprinkler nozzle selected for the prototype limits its use due to the impossibility of ensuring a low flow rate of irrigation water at high pressure in the pressure pipe, especially in its initial section.

In the proposed rain-forming device due to the installation of a throttling element, it is possible to change the pressure of irrigation water in the inlet chamber of the sprinkler nozzles installed along the entire length of the water supply pipe of the wide-sprinkler sprinkler.

In order to change the pressure of irrigation water in the inlet chamber of the sprinkler nozzle, the throttle element is made in the form of a two-chamber hollow body with inlet and outlet chambers with the same cross section.

The design of the throttling element represents local hydraulic resistance, characterizing the loss of pressure (pressure) with local resistance. The throttling element allows to reduce the pressure of the irrigation water in the inlet chamber of the short-jet sprinkler nozzle

In order to change the pressure of the irrigation water in the inlet and outlet chambers of the same cross section, a partition is placed in the throttling element.

In order to purify irrigation water from large mechanical impurities larger than 2.5 mm, the partition is made with holes.

When a partition with openings of no more than 2.5 mm is made, irrigation water is purified and the calibrated opening of the sprinkler nozzle is not clogged by mechanical impurities

In order to change the water pressure in the inlet chamber of the sprinkler nozzle, a truncated cone is installed on the partition of the throttling element. The truncated cone is made with a central angle α = 13 ° -15 °.

For the most common sizes in short-jet irrigation nozzles used on wide-grip irrigation machines, as well as in the irrigation nozzle selected for the prototype, the optimum value of the cone taper angle α = 13 ° -15 ° is provided. A truncated cone mounted on the partition of the throttling element is included in the confuser of the sprinkler nozzle. Therefore, the truncated cone is made with a central angle of 13 ° -15 °, that is, with the same angle as the sprinkler nozzle confuser.

With the aim of manufacturing a throttling element in the form of a two-chamber hollow body with input and output chambers and threads on the inner cylindrical part of the output chamber, the truncated cone is installed removable and with the possibility of changing axial displacement. In the manufacture of the throttling element, the inlet and outlet chambers and the partition with holes are made, and a thread is cut for connecting the sprinkler nozzle. Then a truncated cone with a threaded connection is installed. The truncated cone is screwed into the partition to the required position in the axial direction and tightened with a nut.

In order to obtain the possibility of issuing a small flow rate of irrigation water with a sprinkler device, for example in the range of 0.020 ... 0.100 l / s with a relatively high working pressure of irrigation water in the water supply pipe in the range of at least 0.4 ... 0.6 MPa, the rain-forming nozzle is mounted on a throttling element. Moreover, due to the truncated cone, it is possible to regulate the pressure of irrigation water in the inlet chamber of the sprinkler nozzle.

In order to obtain the possibility of changing the pressure of the irrigation water in the inlet chamber of the sprinkler nozzle, the truncated cone of the throttling element is installed in a conical confuser.

In order to ensure the possibility of water dispensing with a sprinkler nozzle, for example, in the range of 0.020 ... 0.100 l / s at a relatively high working pressure of irrigation water in the pipeline of the sprinkler machine in the range of 0.4 ... 0.6 MPa, the sprinkler nozzle is mounted on a throttling element with the possibility of changing the clearance between the surfaces of the confuser and the truncated cone of the throttling element.

With an increase in the gap, the pressure of the irrigation water in the inlet chamber of the sprinkler nozzle increases, and the flow of irrigation water to the sprinkler also increases.

With a decrease in the gap between the confuser and the truncated cone, the pressure of the irrigation water at the inlet chamber of the sprinkler nozzle decreases, and the flow of irrigation water with the sprinkler nozzle decreases.

The identified signs of a technical solution of the proposed rain-forming device allow us to conclude that the technical solution meets the criterion of "Significant differences".

Figure 1 shows a longitudinal section of a rain-forming device installed on the pressure pipe of the sprinkler; figure 2 is a cross section aa in figure 1.

The rain-forming device has a sector-specific irrigation nozzle 1. The case of the irrigation nozzle 1 has a deflector 2 with a reflective surface 3 in the upper part and a connecting threaded section 4 for connection to the throttling element 5. In the case of the irrigation nozzle 1, a passage 6 is made in the form of a straight conical confuser generatrix 7 with a calibrated cylindrical hole 8. The reflective surface 3 of the deflector is milled and represents a part of the surface of the ellipsoid Nia in the vertical plane. The central angle of the cone of the confuser is α = 13 ° -15 °, its peak A is at a distance hк = (3,3 ÷ 3,6) d from the plane of the outflow 9 of irrigation water from the calibrated hole 8.

The throttling element 5 is made in the form of a two-chamber hollow body with input 10 and output 11 cameras. A partition 12 is made between the inlet 10 and outlet 11 of the chokes of the throttling element. The partition 12 is made with holes 13. The holes 13 are made in the partition 12 with a diameter of not more than 2.5 mm. Holes 13 act as a filter. According to the conditions of irrigation water purification, mechanical impurities larger than 2.5 mm are not allowed.

In the case of the throttling element 5, a truncated cone 14 is installed on the partition 12. The truncated cone 14 is made with a central angle α = 13 °. The truncated cone 14 is mounted on the partition 12 with the possibility of axial displacement. To do this, the truncated cone 14 is screwed into the partition 12 and tightened with a nut 15.

A sprinkler nozzle 1 is installed on the throttling element 5, and a truncated cone 14 inserted into the partition 12 of the throttling element 5 enters the confuser.

The sprinkler nozzle is installed with the possibility of changing the gap between the surfaces of the confuser and the truncated cone 14 of the throttling element 5.

The throttling element 5 is fixed in the fitting 16 of the water supply pressure pipe 17 above its water outlet 18. On the outer surface of the body of the throttling element 5 from the inlet chamber 10, a thread is made for installation in the nozzle 16 of the pressure pipe 17. On the inner surface of the outlet AND chamber of the throttling element 5 is made thread for mounting and fixing the sprinkler nozzle 1.

Rain-forming device operates as follows.

The truncated cone 14 is screwed into the baffle 12 of the throttling element 5 to the required position and tightened with the nut 15. The throttling element 5 assembled with the truncated cone 14 is screwed into the fitting 16 of the pressure pipe 17. A sprinkler nozzle 1 is inserted into the outlet chamber 11 along the threaded section 4 and installed in operating position so that the gap between the surfaces of the confuser of the sprinkler nozzle 1 and the truncated cone 14 creates the necessary pressure (pressure) from the calibrated hole 8, i.e. on the flow of irrigation water with a sprinkler device in the required range. The sprinkler device is installed in the operating position so that the reflective surface 3 of the sprinkler nozzle 1 is directed perpendicular to the longitudinal axis of the water supply pipe 17.

Irrigation water under pressure from the hydrant of the closed irrigation network is supplied to the pressure head water pipe 17 of the sprinkler and through the water outlet 18 and the nozzle 16 enters the inlet chamber 10 of the throttling element 5. From the inlet chamber 10, irrigation water is supplied through the openings 13 made in the partition 12, into the output chamber 11 of the throttling element 5.

Irrigation water from the outlet chamber 11 of the throttling element 5 enters through a gap formed by the surfaces of the confuser with a rectilinear generatrix 7 and a truncated cone 14, necessary to ensure a given flow rate and the required quality of the formed rain. When moving along a conical confuser, the water flow, gradually compressing, increases its speed to a maximum in front of the calibrated hole 8. With the greatest kinetic energy, the water flow through the calibrated hole 8 hits the reflective surface 3 of the deflector 2, changes the direction of movement, and disintegrates into separate jets and drops It turns into artificial rain distributed over the surface of the irrigated area.

To obtain the required flow rate of irrigation water with a sprinkler device at a relatively high working pressure of irrigation water in the water supply pipe, the rain-forming nozzle is installed on the throttling element with the necessary clearance between the surfaces of the confuser and the truncated cone 14.

The gap between the surfaces of the truncated cone 14 and the conical confuser, made with a rectilinear generatrix 7, plays the role of local dynamic resistance to water flow. Depending on the size of the gap, the pressure (pressure) of the irrigation water changes in front of the calibrated hole 8.

The rain-forming device allows to reduce the water pressure (pressure) in front of the calibrated hole of the sprinkler nozzle and to establish the required flow rate of irrigation water at a relatively high water pressure in the pressure pipe of the sprinkler.

Information sources

1. Lutsky V.G., Ilyin S.P. Sprinkling machine "Kuban". - M.: Agropromizdat, 1985 .-- 64 p.

2. A.S. USSR No. 1729603, class B05B 1/04, 03.20.90.

Claims (1)

A rain-forming device comprising a short-jet irrigation nozzle containing a housing with a longitudinal passage channel made in the form of a confuser passing into a cylindrical calibrated hole, a deflector with a reflective surface made in the form of an ellipsoid surface, with an internal recess, characterized in that the irrigation nozzle is equipped with a throttling element made in the form of a two-chamber hollow body with inlet and outlet chambers of the same cross section, between which is placed and a partition with holes made, and a truncated cone with a made central angle α = 13-15 ° and with the possibility of axial displacement is installed on the partition in the conical confuser of the sprinkler nozzle.

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